CN115568970A - Electric toothbrush capable of discharging toothpaste - Google Patents

Abstract

The invention discloses an electric toothbrush capable of discharging toothpaste, which comprises a driving body, a hollow brush rod and a brush head, wherein the brush rod is connected with the driving body, the brush head comprises a brush disc and brush bristles, the brush disc is rotatably connected on the brush rod, the brush disc is provided with a central through hole, an air pump is arranged in the driving body, the lower part of the driving body is provided with a connecting block, the middle position of the connecting block is provided with a toothpaste head connecting hole, the connecting block is provided with an air inlet channel and a toothpaste outlet channel, the middle of the brush rod is provided with a toothpaste outlet tube, one end of the toothpaste outlet tube corresponds to the central through hole and is connected with the brush disc, the other end of the toothpaste outlet tube is communicated with the toothpaste outlet channel, and the air outlet of the air pump is communicated with the air inlet channel through a pipeline; the connecting block is also connected with a barrel-shaped shell; when the head of the toothpaste is arranged on the connecting hole, the toothpaste outlet channel is communicated with the toothpaste opening part, and the air inlet channel is communicated with the outer surface of the toothpaste; or the toothpaste outlet channel is inserted into the toothpaste through a pipeline, and the air inlet channel is communicated with the toothpaste opening. The invention improves the reliability of toothpaste, and the toothpaste outlet pipeline is convenient to clean and has better sanitation.

Description

An electric toothbrush capable of dispensing toothpaste

technical field

The invention relates to the technical field of electric toothbrush manufacture, in particular to an electric toothbrush capable of dispensing toothpaste.

Background technique

The electric toothbrush uses the rapid rotation or vibration of the motor core to make the brush head rotate or vibrate at high frequency, instantly decompose the toothpaste into fine foam, and deeply clean the gaps between the teeth. At the same time, the vibration of the bristles can promote blood circulation in the oral cavity. Gum tissue has a massaging effect. Therefore electric toothbrush begins to be gradually accepted and used by the masses.

In order to further improve the convenience of using electric toothbrushes, electric toothbrushes that can automatically dispense toothpaste have appeared on the market. For example, on March 22, 2022, a patent No. ZL202122057888. Toothbrush" Chinese invention patent, which includes a toothpaste bottle (1), a main body installation shell (2), a foam pump (3), an ultrasonic vibration motor (4) and a hollow toothbrush head (5); the toothpaste bottle (1 ) is installed under the main body installation shell (2), the foam pump (3) and the ultrasonic vibration motor (4) are both arranged in the main body installation shell (2), and one end of the foam pump (3) passes through the main body installation shell (2) Placed in the toothpaste liquid bottle (1), the other end of the foam pump (3) is equipped with a hollow vibration shaft (6), and the hollow vibration shaft (6) passes through the ultrasonic vibration motor (4) to connect to the hollow toothbrush head (5). The electric toothbrush uses the foam pump to extract the toothpaste liquid from the bottle to form a foam liquid that flows through the middle of the vibration shaft to the toothpaste head and overflows onto the toothbrush bristles, thereby achieving the effect of saving trouble without squeezing the toothpaste. However, the toothpaste channel of the electric toothbrush with this structure needs to pass through the middle of the vibration shaft, the channel cross-sectional area is relatively limited, and the toothpaste liquid is pumped out by a foam pump, and the toothpaste liquid must pass through the inside of the foam pump. Blockage and pollution are generated in the channel, and the toothpaste is not smooth, the reliability of the toothpaste is affected, and the cleaning of the toothpaste channel is also inconvenient, which will affect the hygienic situation of the toothpaste.

Contents of the invention

The technical problem to be solved by the present invention is to provide an electric toothbrush capable of dispensing toothpaste, which can effectively improve the reliability of dispensing toothpaste, and the pipeline of dispensing toothpaste is also more convenient to clean, and it is not easy to contaminate the toothpaste, and has better hygiene.

In order to achieve the above object, the technical solution of the present invention is: an electric toothbrush capable of producing toothpaste, comprising a hand-held drive body, a hollow brush rod and a bristle head, a driving motor and a battery are housed in the drive body, and the bristle head includes a brush plate and a bristle head. Bristles, the bristles are mounted on the front of the brush tray, one end of the brush rod is connected to the drive body, the other end of the brush rod is provided with a head, the rear part of the brush tray is rotatably connected to the head of the brush rod, the drive body and the brush rod There is a transmission mechanism in the middle, and the drive motor drives the brush plate to rotate back and forth through the transmission mechanism. The brush plate is provided with a central through hole, and an air pump is installed in the drive body. hole, the connection block is also provided with an air inlet channel and a toothpaste outlet channel, a toothpaste outlet tube is installed in the middle of the brush rod, one end of the toothpaste outlet tube corresponds to the central through hole to connect to the brush tray or is in contact with the brush tray, and the toothpaste outlet tube is the other One end extends into the drive body and communicates with the toothpaste outlet channel, and the air pump outlet communicates with the air intake channel through a pipeline; the connecting block is also connected with a barrel-shaped housing;

When the head of the toothpaste is installed on the connecting hole, the connection between the head of the toothpaste and the connecting hole forms a seal, and the toothpaste body is in the space surrounded by the barrel-shaped housing and the connecting block; The channel communicates with the mouth of the toothpaste, the air intake channel communicates with the outer surface of the toothpaste and the connection between the barrel-shaped housing and the connecting block forms a seal; mouth of toothpaste;

The drive body is equipped with a control circuit board and at least one control switch, the control switch, battery, drive motor and air pump are all electrically connected to the control circuit board, and the control switch is used to control the action of the drive motor or the action of the air pump.

Preferably, the transmission mechanism includes a rotating rod and an L-shaped linkage rod. One end of the L-shaped linkage rod is connected to the brush plate, the other end of the L-shaped linkage rod is connected to the upper part of the rotation rod, and the other end of the L-shaped linkage rod is connected to the rotation center axis of the rotation rod. No coincidence; the rotating rod is installed in the brush rod, and a driving shaft is installed on the driving body. One end of the driving shaft is connected to the driving motor, and the other end extends into the brush rod and is connected to the rotating rod. The rotating rod is driven by the driving shaft along the circumferential direction. Turn around, and the rotating rod drives the brush plate to rotate back and forth through the L-shaped linkage rod. Through this transmission mechanism, the brush disc can be driven to rotate back and forth more reliably.

Further, the brush plate is provided with a first insertion hole, and the upper part of the rotating rod is provided with a second insertion hole, one end of the L-shaped linkage rod is inserted into the first insertion hole, and the other end of the L-shaped linkage rod is inserted into the first insertion hole. on the second socket.

As a further improvement, internal threads are provided on the inner surface of the connecting hole, and the head of the toothpaste is connected to the connecting hole by screwing. This facilitates the installation of the toothpaste, and also facilitates the formation of a sealed connection between the head of the toothpaste and the connecting hole.

As a further improvement, the upper end of the barrel-shaped housing is clamped on the lower part of the drive body, the outer peripheral surface of the lower part of the connecting block is provided with an annular groove, and a sealing ring is installed on the annular groove, and the inner surface of the upper end of the barrel-shaped housing is connected by a sealing ring. the connection block. It is convenient for the barrel-shaped housing and the connecting block to form a sealed space.

As a further improvement, one end of the brush rod is connected to the drive body by clamping; the rear side of the upper part of the brush rod is also provided with a through hole for installation. to improve installation performance.

As a further improvement, a window is provided on the rear side of the head of the brush rod, and a camera assembly is installed on the inner rear side of the head of the brush rod. The lens of the camera assembly corresponds to the window. The camera assembly includes a PCB circuit board and a lens, and the lens is installed on the PCB circuit On the board, the PCB circuit board is electrically connected to the control circuit board through wires, and the camera assembly is controlled to shoot through the control switch. In this way, the electric toothbrush can increase the camera function of teeth and oral cavity, further enhance the functional characteristics of the electric toothbrush, and the overall structure is also compact.

As a further improvement, a circular tube body is provided at the rear of the brush plate, at least two connecting through holes or connecting grooves are provided on the circular tube body along the circumference, an inner cylindrical surface is provided on the inner side of the head of the brush rod, and an inner cylindrical surface is provided on the inner cylindrical surface. There are at least two first matching protrusions. After the round tube body is inserted into the head of the brush holder, each first matching protrusion is matched with one of the connection through holes or the connection groove. This facilitates making the brush disc rotatably connected to the head of the brush rod.

Still further, the brush tray is further provided with a connecting column in the middle of the circular tube body, the central through hole extends from the front end of the brush tray to the rear end of the connecting column, and the connecting column can be movably inserted into one end of the toothpaste outlet tube. This is convenient for one end of the toothpaste outlet tube to connect to the central through hole of the brush tray, so that the toothpaste outlet is smoother.

Still further, a plurality of second matching protrusions are arranged at intervals along the circumferential direction on the front side of the outer periphery of the circular tube body, the outer surfaces of the plurality of second matching protrusions are on the same cylindrical surface, and the outer surfaces of the plurality of second matching protrusions are simultaneously Cooperate with the inner cylindrical surface; the rear end of the circular tube also extends outwards with two limiting protrusions. The friction force between the brush plate and the head of the brush rod can be reduced by a plurality of second matching protrusions, and the rotation shaking can also be reduced; the rotation angle of the brush plate can be limited by combining two limiting protrusions with the head of the brush rod , to prevent the brush disc from being over-rotated to protect the brush rod and brush disc.

In the present invention, since the brush plate is provided with a central through hole, an air pump is installed in the drive body, a connection block is provided at the lower part of the drive body, a toothpaste head connection hole is provided in the middle of the connection block, and an air inlet channel and a toothpaste outlet are also provided on the connection block. Channel, a toothpaste outlet pipe is installed in the middle of the brush rod, one end of the toothpaste outlet pipe corresponds to the central through hole to connect to the brush plate or is in contact with the brush plate, the other end of the toothpaste outlet pipe extends into the drive body and communicates with the toothpaste outlet channel, the air pump The air outlet communicates with the air inlet passage through a pipeline; the connection block is also connected with a barrel-shaped housing; when the head of the toothpaste is installed on the connection hole, the connection between the head of the toothpaste and the connection hole forms a seal, The body is in the space surrounded by the barrel-shaped housing and the connecting block; the toothpaste outlet channel communicates with the mouth of the toothpaste, the air intake channel communicates with the outer surface of the toothpaste and the connection between the barrel-shaped housing and the connecting block A seal is formed; or the toothpaste outlet channel is inserted into the toothpaste through a pipe, and the air inlet channel communicates with the mouth of the toothpaste. When the air intake passage communicates with the outer surface of the toothpaste, start the air pump, and the air pressure can extrude the outer surface of the toothpaste, so that the toothpaste enters the toothpaste outlet pipe and then outputs to the middle of the bristles from the center through hole of the brush tray; when the outlet toothpaste passage passes through a The pipe is inserted into the inside of the toothpaste, and when the air intake channel is connected to the mouth of the toothpaste, the air pump is started, and the air pressure can drive the toothpaste through the pipe into the toothpaste outlet pipe and then output from the center through hole of the brush plate to the middle of the bristles, so the toothpaste is all discharged through the toothpaste Pipe for transmission, set the output cross-sectional area of the toothpaste pipe, the toothpaste is not easy to block, the reliability of the toothpaste is better; it is more convenient to clean the toothpaste pipeline when it is not used for a long time, and the toothpaste does not pass through the air pump at the same time. It will not pollute the toothpaste, and the sanitation is better.

Description of drawings

Fig. 1 is a perspective view of the first embodiment of the present invention;

Fig. 2 is a top view of the first embodiment of the present invention;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is a perspective view of the brush tray detached from the brush rod in the first embodiment of the present invention;

Fig. 5 is another perspective view of the brush plate detached from the brush rod in the first embodiment of the present invention;

Fig. 6 is an enlarged view at B of Fig. 4;

Fig. 7 is an enlarged view at C of Fig. 5;

Fig. 8 is a perspective view of the hidden part of the drive body, the brush holder, the barrel case, and the toothpaste in the first embodiment of the present invention;

Fig. 9 is a perspective view from another angle of the hidden part of the driving body, the brush holder, the barrel case and the toothpaste in the first embodiment of the present invention;

Fig. 10 is a cross-sectional view of the structure of the second embodiment of the present invention.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 to Fig. 9, a kind of electric toothbrush that can produce toothpaste, comprises the drive body 1 of holding, hollow brush rod 2 and bristle head 3, drive motor 11, battery 12 are housed in drive body 1, and bristle head 3 includes The brush plate 31 and the bristles 32, the bristles 32 are planted on the front of the brush plate 31, one end of the brush rod 2 is connected to the drive body 1, the other end of the brush rod 2 is provided with a head, and the rear part of the brush plate 31 is rotatably connected to the brush rod 2, a transmission mechanism 4 is installed in the drive body 1 and in the middle of the brush rod 2, and the drive motor 11 drives the brush plate 31 to rotate back and forth through the transmission mechanism 4. The brush plate 31 is provided with a central through hole 311, and the drive body 1 is equipped with Air pump 5, the bottom of driving body 1 is provided with connection block 6, and the middle position of connection block 6 is provided with toothpaste head connection hole 6a, and connection block 6 is also provided with air intake passage 61 and outlet toothpaste passage 62, and brush rod 2 is installed in the middle. There is a toothpaste outlet pipe 21, one end of the toothpaste outlet pipe 21 corresponds to the central through hole 311 to connect to the brush plate 31, one end of the toothpaste outlet pipe 21 corresponds to the central through hole 311 and can also be in contact with the brush plate 31, and the toothpaste outlet pipe 21 is another One end extends into the drive body 1 and communicates with the toothpaste outlet channel 62, and the air outlet of the air pump 5 communicates with the air intake channel 61 through a pipeline; the connecting block 6 is also connected with a barrel-shaped housing 7;

When the head of the toothpaste 10 was installed on the connecting hole 6a, the inner surface of the connecting hole 6a was provided with an internal thread, and the head of the toothpaste 10 could be connected to the connecting hole 6a by screwing, so the screwed When tighter, the joint of the head of the toothpaste 10 and the connecting hole 6a forms a seal;

The toothpaste 10 body is in the space enclosed by the barrel-shaped housing 7 and the connecting block 6; the toothpaste passage 62 communicates with the mouth of the toothpaste 10, the air intake passage 61 communicates with the outer surface of the toothpaste 10 and the barrel The connection between the barrel-shaped housing 7 and the connecting block 6 forms a seal; specifically, the upper end of the barrel-shaped housing 7 is clamped on the lower part of the driving body 1, and the outer peripheral surface of the lower part of the connecting block 6 is provided with an annular groove 63, A sealing ring 6b is installed on the annular groove 63, and the inner surface of the upper end of the barrel-shaped housing 7 is connected to the connecting block 6 through the sealing ring 6b.

The drive body 1 is equipped with a control circuit board 8 and a control switch 81, the control switch 81, the battery 12, the drive motor 11 and the air pump 5 are all electrically connected to the control circuit board 8, and the control switch 81 is used to control the action of the drive motor 11 or control the air pump 5 actions. According to the needs of the control function, multiple control switches 81 can be provided, and multiple corresponding indicator lights can also be provided on the control circuit board 8 . Two batteries 12 are provided and connected together. The battery 12 can also be set as a rechargeable battery, and then a charging port is set on the drive body 1 .

The transmission mechanism 4 includes a rotating rod 41 and an L-shaped linkage rod 42. One end of the L-shaped linkage rod 42 is connected to the brush plate 31, the other end of the L-shaped linkage rod 42 is connected to the upper part of the rotation rod 41, and the L-shaped linkage rod 42 is connected to the top of the rotation rod 41. One end does not coincide with the rotation center axis of the rotating rod 41; the rotating rod 41 is installed in the brush rod 2, and a driving shaft 43 is pivotally connected to the driving body 1. One end of the driving shaft 43 is connected to the driving motor 11, and the other end extends into the brush rod 2 and connected to the rotating rod 41, the rotating rod 41 is driven by the drive shaft 43 to rotate back and forth in the circumferential direction, and the rotating rod 41 drives the brush plate 31 to rotate back and forth through the L-shaped linkage rod 42. The lower end of the rotating rod 41 can be pivotally connected to the driving body 1 .

The brush plate 31 is provided with a first insertion hole 312, and the upper part of the rotating rod 41 is provided with a second insertion hole 411. One end of the L-shaped linkage rod 42 is inserted on the first insertion hole 312, and the L-shaped linkage The other end of the rod 42 is inserted into the second insertion hole.

One end of the brush rod 2 is connected to the drive body 1 by clamping; the upper rear side of the brush rod 2 is also provided with an installation through hole 22 . In order to facilitate the installation of the rotating rod 41 and the L-shaped linkage rod 42.

The rear side of the head of the brush bar 2 is provided with a window 23, and the rear side of the head of the brush bar 2 is installed and fixedly connected with a camera assembly 9, the lens of the camera assembly 9 corresponds to the window 23, and the camera assembly 9 includes a PCB circuit board and a lens , the lens is installed on the PCB circuit board and waterproofed, then the PCB circuit board is electrically connected to the control circuit board 8 through the wire 91, and the camera assembly 9 is controlled by the control switch 81 to shoot. A wireless receiving module can be set on the control circuit board 8, and then wirelessly communicate with the mobile phone, and the photos taken by the camera assembly 9 can be displayed by the mobile phone.

The rear portion of the brush plate 31 is provided with a round tube body 313, and the round tube body 313 is provided with two connecting through holes 314 along the circumference, and the connecting through holes 314 can also be set as connecting grooves. There is an inner cylindrical surface 24, and two first matching protrusions 25 are arranged on the inner cylindrical surface 24. After the round pipe body 313 is inserted into the head of the brush rod 2, each first matching protrusion 25 is connected with one of the connecting through holes. 314 match.

The brush plate 31 is also provided with a connecting post 315 in the middle of the round tube body 313, the central through hole 311 extends from the front end of the brush plate 31 to the rear end of the connecting post 315, and the connecting post 315 can be movably inserted into the toothpaste outlet tube 21 one end.

The front side of the outer peripheral surface of the circular tube body 313 is provided with a plurality of second mating protrusions 316 at intervals along the circumferential direction, the outer surfaces of the plurality of second mating protrusions 316 are on the same cylindrical surface, and the outer surfaces of the plurality of second mating protrusions 316 At the same time, it cooperates with the inner cylindrical surface 24; the rear end of the circular tube body 313 also extends outwards with two limiting protrusions 317 to prevent the brush plate 31 from being over-rotated.

When this embodiment is in use, press the control switch 81 to one side to start the air pump 5, and the space surrounded by the barrel-shaped housing 7 and the connecting block 6 is inflated, and the air pressure squeezes the toothpaste 10 body, and the toothpaste Just enter the toothpaste outlet pipe 21 from the toothpaste outlet channel 62 and then output to the middle of the bristles 32 from the central through hole 311 of the brush plate 31; then release the control switch 81, and the toothpaste output stops; Start the drive motor 11, the drive motor 11 drives the brush plate 31 to rotate back and forth by the transmission mechanism 4, and carries out electric brushing;

Embodiment 2, as shown in FIG. 10 , is an electric toothbrush capable of producing toothpaste. The difference from Embodiment 1 is that the toothpaste outlet channel 62 is inserted into the toothpaste 10 through a pipe 621, and the air inlet channel 61 communicates with the toothpaste. 10 of the mouth.

When using this embodiment, press the control switch 81 to one side to start the air pump 5, and the air pressure can drive the toothpaste through the pipeline 621 into the toothpaste outlet pipe 21 and then output it from the center through hole 311 of the brush plate 31 to the middle of the bristles 32, and then release it. Control switch 81, stop toothpaste; Then press the other side of control switch 81, just can start drive motor 11, drive motor 11 drives brush plate 31 to rotate back and forth through transmission mechanism 4, carries out electric brushing; When wanting to take pictures, press control switch 81 On another side, the photos taken by the camera assembly 9 can be displayed on the mobile phone.

Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art will understand that the present invention may be modified in form and detail without departing from the spirit and scope of the present invention as defined by the appended claims. Making various changes is within the protection scope of the present invention.

Claims (10)

1. The utility model provides an electric toothbrush that can go out toothpaste, including the drive body of holding, cavity brush-holder stud and brush hair head, be equipped with driving motor in the drive body, a battery, the brush hair head is including brush dish and brush hair, the brush hair dress is on brush dish front portion, brush-holder stud one end is connected on the drive body, the brush-holder stud other end is equipped with the head, brush dish rear portion rotatable coupling is on the head of brush-holder stud, this internal and brush-holder stud centre of drive is equipped with drive mechanism, driving motor drives brush dish through drive mechanism and makes a round trip to rotate its characterized in that: the toothbrush is characterized in that the brush disc is provided with a central through hole, an air pump is arranged in the driving body, the lower part of the driving body is provided with a connecting block, the middle position of the connecting block is provided with a toothpaste head connecting hole, the connecting block is also provided with an air inlet channel and a toothpaste outlet channel, the middle of the brush rod is provided with a toothpaste outlet pipe, one end of the toothpaste outlet pipe corresponds to the central through hole and is connected with the brush disc or is contacted with the brush disc, the other end of the toothpaste outlet pipe extends into the driving body and is communicated with the toothpaste outlet channel, and the air outlet of the air pump is communicated with the air inlet channel through a pipeline; the connecting block is also connected with a barrel-shaped shell;

when the head part of the toothpaste is arranged on the connecting hole, the connection part of the head part of the toothpaste and the connecting hole forms a seal, and the toothpaste body is positioned in a space enclosed by the barrel-shaped shell and the connecting block; the toothpaste outlet channel is communicated with the toothpaste opening, the air inlet channel is communicated with the outer surface of the toothpaste, and the joint of the barrel-shaped shell and the connecting block forms a seal; or the toothpaste outlet channel is inserted into the toothpaste through a pipeline, and the air inlet channel is communicated with the toothpaste opening;

the driving body is provided with a control circuit board and at least one control switch, the battery, the driving motor and the air pump are all electrically connected with the control circuit board, and the control switch is used for controlling the driving motor to act or controlling the air pump to act.

2. The electric toothbrush capable of discharging toothpaste as claimed in claim 1, wherein: the transmission mechanism comprises a rotating rod and an L-shaped linkage rod, one end of the L-shaped linkage rod is connected with the brush disc, the other end of the L-shaped linkage rod is connected with the upper part of the rotating rod, and the other end of the L-shaped linkage rod is not coincident with the rotating central axis of the rotating rod; the dwang dress is in the brush-holder stud, and a drive shaft dress is on the drive body, and driving motor is connected to the one end of drive shaft, the other end stretch into in the brush-holder stud and connect the dwang, and the dwang passes through the drive shaft and drives and make a round trip to rotate along circumference, and the dwang passes through L shape gangbar and drives the brush dish and make a round trip to rotate.

3. The electric toothbrush capable of discharging toothpaste as claimed in claim 2, wherein: the brush disc is provided with a first inserting hole, the upper portion of the rotating rod is provided with a second inserting through hole, one end of the L-shaped linkage rod is inserted into the first inserting hole, and the other end of the L-shaped linkage rod is inserted into the second inserting hole.

4. The electric toothbrush capable of discharging toothpaste as claimed in claim 1, wherein: the inner surface of the connecting hole is provided with internal threads, and the toothpaste head is connected to the connecting hole in a screwing mode.

5. The electric toothbrush capable of discharging toothpaste as claimed in claim 1, wherein: the upper end of the barrel-shaped shell is connected with the lower portion of the driving body in a clamping mode, an annular groove is formed in the outer peripheral face of the lower portion of the connecting block, a sealing ring is arranged on the annular groove, and the inner surface of the upper end of the barrel-shaped shell is connected with the connecting block through the sealing ring.

6. The electric toothbrush capable of discharging toothpaste as claimed in claim 1, wherein: one end of the brush rod is connected to the driving body in a clamping manner; and the rear side of the upper part of the brush rod is also provided with a mounting through hole.

7. The electric toothbrush capable of discharging toothpaste as claimed in claim 1, wherein: the brush-holder stud head rear side is equipped with a window, and the rear side is equipped with a camera subassembly in the brush-holder stud head, and the camera lens of camera subassembly corresponds the window, camera subassembly include PCB circuit board and camera lens, and the camera lens is adorned on the PCB circuit board, and the PCB circuit board passes through wire electricity connection control circuit board, through control switch control camera subassembly shooting.

8. An electric toothbrush capable of discharging toothpaste according to any one of claims 1 to 7, wherein: the rear part of the brush disc is provided with a round pipe body, at least two connecting through holes or connecting grooves are formed in the round pipe body along the circumferential direction, the inner side of the head of the brush rod is provided with an inner cylindrical surface, at least two first matching convex parts are arranged on the inner cylindrical surface, and after the round pipe body is inserted into the head of the brush rod, each first matching convex part is matched with one connecting through hole or one connecting groove.

9. The electric toothbrush capable of discharging toothpaste as claimed in claim 8, wherein: the brush disc is also provided with a connecting column in the middle of the circular tube body, the central through hole extends to the rear end of the connecting column from the front end of the brush disc, and the connecting column can be movably inserted into one end of the toothpaste outlet tube.

10. The electric toothbrush capable of discharging toothpaste as claimed in claim 8, wherein: a plurality of second matching convex parts are arranged on the front side of the outer peripheral surface of the circular pipe body at intervals along the circumferential direction, the outer surfaces of the second matching convex parts are positioned on the same cylindrical surface, and the outer surfaces of the second matching convex parts are simultaneously matched with the inner cylindrical surface; the rear end of the round pipe body also extends outwards to form two limiting convex parts.

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