Electric toothbrush

Abstract

The utility model discloses an electric toothbrush which comprises a main machine, a brush rod is arranged on the main machine, and a brush head used for stretching into an oral cavity to brush teeth is arranged at the top of the brush rod. A driving device is arranged in the main machine; a driving rod capable of rotating in the brush rod is arranged in the brush rod, and the driving rod is connected with a driving device and can be driven by the driving device to rotate; the brush head comprises a support, two extending support corners are arranged on the support, a cleaning space for teeth to enter is formed between the two support corners, and rolling brushes capable of rotating relative to the support corners are arranged on the support corners, so that the two rolling brushes can wrap and clamp the teeth after the teeth enter the cleaning space; the support is further provided with a transmission structure used for connecting the rolling brush and the driving rod, so that the driving rod drives the rolling brush to rotate when rotating, and the electric toothbrush aims at overcoming the defects in the prior art and is more efficient in cleaning and more convenient to use.

Description

Technical Field

[0001] This utility model specifically relates to an electric toothbrush. Background Technology

[0002] With the improvement of people's living standards and the enhancement of oral health awareness, electric toothbrushes have gradually replaced traditional manual toothbrushes and become one of the mainstream oral care tools due to their advantages such as high cleaning efficiency and ease of use. Currently, there are many types of electric toothbrushes on the market, with brush head structures mainly based on single-sided rotation, vibration, or sonic vibration. While these structures improve the convenience and cleaning effect of brushing to some extent, they still have some shortcomings in actual use. Traditional electric toothbrush heads typically use a single brush head and only have a unidirectional movement, making it difficult to clean multiple surfaces of the teeth simultaneously, especially when cleaning the inner and outer surfaces of teeth and the occlusal surfaces of posterior teeth, easily creating blind spots. Secondly, when the brush head can reach the outer side of the posterior teeth, it is difficult to guarantee the direction of bristle movement, ultimately leading to unsatisfactory cleaning results.

[0003] This utility model was developed precisely because of the aforementioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an electric toothbrush that is more efficient in cleaning and more convenient to use.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model provides an electric toothbrush, including a main unit, a brush handle, and a brush head at the top of the brush handle for brushing teeth in the oral cavity; a drive device is provided inside the main unit; a drive rod is provided inside the brush handle and is connected to and driven by the drive device to rotate; the brush head includes a support with two protruding corners forming a cleaning space for teeth to enter; roller brushes are provided on the corners and can rotate relative to them, so that when teeth enter the cleaning space, the two roller brushes can clamp the teeth; the support also has a transmission structure for connecting the roller brushes and the drive rod, so that the rotation of the drive rod drives the roller brushes to rotate.

[0007] As described above, the transmission structure of the electric toothbrush includes a drive gear connected to the drive rod, driven gears located on both sides of the drive gear and respectively connected to the roller brush, and a plurality of transmission gears located between the drive gear and the driven gears and forming a gear set that meshes with the two in sequence.

[0008] In the electric toothbrush described above, the distance D between the two support angles meets the following condition: 9.5mm < D < 20mm.

[0009] As described above, in the electric toothbrush, the brush handle and brush head form a component that can be detachably connected to the main unit, and a coupling structure is provided between the output shaft of the drive device and the drive rod.

[0010] As described above, the electric toothbrush has a shaft cavity that extends vertically through the brush handle and is used to insert and install the drive rod from bottom to top. The drive rod has an upper shaft shoulder, and the shaft cavity has an abutment part on the upper part for abutting against the upper shaft shoulder. A first sealing ring is provided between the upper shaft shoulder and the abutment part.

[0011] As described above, in the electric toothbrush, the upper part of the drive rod is fitted with a first bushing, the outer wall of the first bushing abuts against the side wall of the shaft cavity, and the bottom end of the first bushing abuts against the abutting part.

[0012] As described above, in the electric toothbrush, the lower part of the drive rod is connected to a support sleeve, and a second bushing is connected to the support sleeve. The outer wall of the second bushing abuts against the side wall of the shaft cavity, and the lower part of the shaft cavity is provided with a stepped portion for the second bushing to abut against.

[0013] As described above, the electric toothbrush has an upwardly protruding sealing ring around the top periphery of the second bushing, and the stepped portion has a receiving ring cavity for accommodating the sealing ring.

[0014] As described above, the electric toothbrush has a lower shoulder located above the support sleeve at the lower part of the drive rod, and a second sealing ring is provided between the lower shoulder and the top of the second bushing.

[0015] As described above, the electric toothbrush has a support composed of a base, a connecting seat, and a top seat. The base and the connecting seat form a transmission cavity for accommodating the transmission structure. The base and the brush handle are an integral structure, and the brush handle has a shaft cavity that communicates with the transmission cavity.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. Since the two roller brushes can be located on the inside and outside of the teeth respectively, or on one side at the same time, they can cover multiple surfaces of the teeth, such as the buccal and lingual surfaces, mesial and distal surfaces. Compared with traditional single-sided rotating brush heads, the cleaning area is greatly increased. Whether it is the front teeth or the back teeth, this structure can effectively wrap the teeth. It is especially suitable for the complex occlusal surface and inner and outer surfaces of the back teeth, which helps to remove food debris and dental plaque from hard-to-reach areas.

[0018] 2. When the teeth are positioned between the two roller brushes, the up-and-down movement of the bristles on the roller brush surface can more effectively remove plaque and food debris from the tooth surface. This movement can reach deep into the tiny depressions and crevices on the tooth surface. The up-and-down movement of the bristles can contact the tooth surface from different angles, including hard-to-reach areas such as below the gum line, ensuring a comprehensive cleaning effect. This helps prevent tooth decay and periodontal disease. Moreover, compared with the traditional strong horizontal brushing, the up-and-down movement puts less pressure on the gums, reducing the possibility of gum damage. It is especially suitable for people with sensitive gums.

[0019] 3. The two roller brushes can work simultaneously, which not only increases the cleaning area per unit time, but also reduces the need to move the brush head repeatedly, thereby shortening the overall brushing time. For users in today's fast-paced life, this structure is more suitable for the quick cleaning mode, meeting the need to complete high-quality cleaning in a short time. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the electric toothbrush of this utility model;

[0021] Figure 2 This is a schematic diagram of the electric toothbrush of this utility model in use. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the electric toothbrush of this utility model in use. Figure 2 ;

[0023] Figure 4 This is a cross-sectional schematic diagram of the electric toothbrush of this utility model;

[0024] Figure 5 This is an exploded view of the electric toothbrush of this utility model. Figure 1 ;

[0025] Figure 6 This is an exploded view of the electric toothbrush of this utility model. Figure 2 ;

[0026] Figure 7 This is an exploded view of the electric toothbrush of this utility model. Figure 3 . Detailed Implementation

[0027] The utility model will be further described below with reference to the accompanying drawings:

[0028] The orientations described in this utility model specification, such as "up," "down," "left," "right," "front," and "back," are based on the orientations in the accompanying drawings and are intended to facilitate the description of the relationships between the various components. They do not indicate the unique or absolute positional relationships between the various components, but are merely one embodiment of the utility model and are not a limitation on its implementation.

[0029] This embodiment describes an electric toothbrush, such as Figures 1 to 6 As shown, the device includes a main unit 1, which has a brush handle 2. The brush handle 2 has a brush head 3 at its top for brushing teeth A in the oral cavity. The main unit 1 contains a drive device 11, typically a small motor with an electrically rotating output shaft. The brush handle 2 contains a drive rod 21 that can rotate within it. The drive rod 21 is connected to and driven by the drive device 11. In this embodiment, the brush head 3 includes a support 31 with two protruding prongs 32. These prongs form a cleaning space 300 for teeth A to enter. Each prong 32 has a rotating roller brush 33 with bristles, allowing the two roller brushes to clamp teeth A when they enter the cleaning space 300. The support 31 also has a transmission structure 4 connecting the roller brush 33 and the drive rod 21, so that the rotation of the drive rod 21 drives the roller brush 33 to rotate. In use, as... Figure 2 As shown, when the two prongs 32 extend into the inner and outer sides of tooth A respectively, and tooth A enters the cleaning space 300, the roller brushes 33 on both sides can wrap around the tooth for cleaning. Multiple surfaces of the tooth are cleaned simultaneously by the two roller brushes 33, and the support of the two prongs 32 makes it easier for the roller brushes 33 to adhere to the tooth for cleaning. Figure 3 As shown, when both roller brushes 33 are located on the same side of the teeth at the same time, the teeth on that side can be cleaned simultaneously by both roller brushes 33, which can also improve the cleaning efficiency.

[0030] In this embodiment, the transmission structure 4 adopts the following structure: Figure 6 and Figure 7As shown, the transmission structure 4 includes a driving gear 41 connected to the drive rod 21, driven gears 42 located on both sides of the driving gear 41 and respectively connected to the roller brush 33, and several transmission gears 43 located between the driving gear 41 and the driven gears 42, forming a gear set that meshes sequentially with the two. One or more transmission gears 43 can be provided between the driving gear 41 and the driven gears 42, so that a traditional gear set that meshes sequentially between the driving gear 41 and the driven gears 42 is formed. Furthermore, to ensure that the two roller brushes 33 rotate in opposite directions, thereby enhancing the cleaning effect, the driven gears 42 and transmission gears 43 on both sides are arranged symmetrically.

[0031] As a preferred option, such as Figure 2 and Figure 3 As shown, the distance D between the two support angles 32 meets the following condition: 9.5mm < D < 20mm, so as to better adapt to the size of adult teeth and enable the roller brush 33 to effectively cover both sides of the teeth.

[0032] As a preferred option, such as Figure 5 As shown, the brush rod 2 and brush head 3 form a brush head assembly that can be detachably connected to the host 1. The brush head assembly can be replaced, and the brush head assembly and the host 1 can also be plugged in and snapped together, so that the two can be detachably connected. When the two are connected, the coupling structure 5 connects the output shaft of the drive device 11 to the drive rod 21 for transmission and rotation. The coupling structure 5 includes a coupling 51 connected to the drive rod 21 and a coupling 52 connected to the output shaft of the drive device 11. One of them is provided with a shaped post, and the other is provided with a shaped hole for the shaped post to be inserted.

[0033] Preferably, in order to ensure that the drive rod 21 can be stably installed, operate stably, and have a certain sealing performance, such as Figure 4As shown in the detailed structure: the brush rod 2 has a shaft cavity 200 that runs vertically through the shaft for inserting and mounting the drive rod 21 from bottom to top. The drive rod 21 has an upper shoulder 211 on its upper part, and the shaft cavity 200 has an abutment part 201 on its upper part for abutting against the upper shoulder 211. A first sealing ring 22 is provided between the upper shoulder 211 and the abutment part 201. A first bushing 23 is fitted on the upper part of the drive rod 21, and the outer wall of the first bushing 23 abuts against the side wall of the shaft cavity 200. The bottom end of the first bushing 23 abuts against the abutment part 201. A support sleeve 24 is connected to the lower part of the drive rod 21, and a second bushing 25 is connected to the support sleeve 24. The outer wall of the second bushing 25 abuts against the side wall of the shaft cavity 200, and the lower part of the shaft cavity 200 has a stepped part 202 for the second bushing 25 to abut against. The second bushing 25 has an upwardly protruding sealing ring 251 around its top periphery, and the stepped portion 202 has a receiving ring cavity 203 for accommodating the sealing ring 251. The lower part of the drive rod 21 has a lower shoulder 212 located above the support sleeve 24, and a second sealing ring 26 is provided between the lower shoulder 212 and the top of the second bushing 25.

[0034] As a preferred option, such as Figure 7 As shown, the support 31 is composed of a base 311, a connecting seat 312 and a top seat 313. The base 311 and the connecting seat 312 form a transmission cavity 400 for accommodating the transmission structure 4. The base 311 and the brush rod 2 are an integral structure. The brush rod 2 has a shaft cavity 200 that communicates with the transmission cavity 400.

[0035] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An electric toothbrush, characterized in that: It includes a main unit (1), on which a brush rod (2) is provided, and a brush head (3) for inserting into the oral cavity to brush teeth (A) is provided at the top of the brush rod (2); The host (1) is equipped with a drive device (11); The brush rod (2) is provided with a drive rod (21) that can rotate inside it. The drive rod (21) is connected to the drive device (11) and can be driven by the drive device (11) to rotate. The brush head (3) includes a support (31), on which two protruding corners (32) are provided. The two corners (32) form a cleaning space (300) for the tooth (A) to enter. The corners (32) are provided with roller brushes (33) that can rotate relative to them, so that when the tooth (A) enters the cleaning space (300), the two roller brushes (33) can clamp the tooth (A). The support (31) is also provided with a transmission structure (4) for connecting the roller brush (33) and the drive rod (21), so that when the drive rod (21) rotates, it drives the roller brush (33) to rotate.

2. The electric toothbrush according to claim 1, characterized in that: The transmission structure (4) includes a drive gear (41) connected to the drive rod (21), driven gears (42) located on both sides of the drive gear (41) and connected to the roller brush (33) respectively, and a number of transmission gears (43) located between the drive gear (41) and the driven gears (42) and forming a gear set that meshes with the two in sequence.

3. The electric toothbrush according to any one of claims 1-2, characterized in that, The distance D between the two support angles (32) meets the following condition: 9.5mm < D < 20mm.

4. The electric toothbrush according to any one of claims 1-2, characterized in that: The brush rod (2) and brush head (3) form a component that can be detachably connected to the host (1), and a coupling structure (5) is provided between the output shaft of the drive device (11) and the drive rod (21).

5. The electric toothbrush according to any one of claims 1-2, characterized in that: The brush rod (2) has a shaft cavity (200) that runs through it from bottom to top and is used to insert and install the drive rod (21) from bottom to top. The drive rod (21) has an upper shaft shoulder (211) on its upper part. The shaft cavity (200) has an abutment part (201) on its upper part for abutting against the upper shaft shoulder (211). A first sealing ring (22) is provided between the upper shaft shoulder (211) and the abutment part (201).

6. The electric toothbrush according to claim 5, characterized in that: The drive rod (21) is fitted with a first bushing (23) on its upper part. The outer wall of the first bushing (23) abuts against the side wall of the shaft cavity (200), and the bottom end of the first bushing (23) abuts against the abutment part (201).

7. The electric toothbrush according to any one of claims 1-2, characterized in that: The drive rod (21) is connected to a support sleeve (24) at its lower part, and a second bushing (25) is connected to the support sleeve (24). The outer wall of the second bushing (25) abuts against the side wall of the shaft cavity (200), and the lower part of the shaft cavity (200) is provided with a stepped part (202) for the second bushing (25) to abut against.

8. The electric toothbrush according to claim 7, characterized in that: The second bushing (25) has an upwardly protruding sealing ring (251) around its top edge, and the stepped portion (202) has a receiving ring cavity (203) for accommodating the sealing ring (251).

9. The electric toothbrush according to claim 7, characterized in that: The drive rod (21) has a lower shoulder (212) located above the support sleeve (24) at its lower part, and a second sealing ring (26) is provided between the lower shoulder (212) and the top end of the second bushing (25).

10. The electric toothbrush according to any one of claims 1-2, characterized in that: The support (31) is composed of a base (311), a connecting seat (312) and a top seat (313). The base (311) and the connecting seat (312) form a transmission cavity (400) for accommodating the transmission structure (4). The base (311) and the brush rod (2) are an integral structure. The brush rod (2) has a shaft cavity (200) that communicates with the transmission cavity (400).

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