Sterilizable toothbrush

Abstract

The application relates to a sterilization toothbrush, which comprises a brush head assembly, a brush rod assembly and a sterilization assembly connected to the brush rod assembly, the brush head assembly comprises a brush head piece and a telescopic sub-rod connected to the brush head piece, the brush rod assembly comprises a telescopic main rod and a telescopic control part, the telescopic control part is used for controlling the telescopic sub-rod to telescope along the telescopic main rod, a sterilization position is arranged on the brush rod assembly, the brush head piece and the telescopic sub-rod can be overlapped or misaligned with the sterilization position, and the sterilization assembly is used for sterilizing the brush head piece or the telescopic sub-rod arranged at the sterilization position. The application has the effect of reducing the bacteria on the bristles of the toothbrush after use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of toothbrushes, and in particular to a bacteria-removing toothbrush. BACKGROUND

[0002] At present, brushing teeth in the morning and evening has become a habit of most people, and therefore toothbrushes are widely used in people's daily life as a tool for brushing teeth.

[0003] In the related art, a toothbrush includes a brush head for cleaning the oral cavity and a brush rod for being held by a person. When using the toothbrush, toothpaste is first applied to the bristles of the brush head, and then the bristles are brought into contact with the teeth. Then, the brush rod is controlled to move to drive the brush head to move in the oral cavity. The bristles rub against the teeth to complete the cleaning of the oral cavity.

[0004] In the related art, the toothbrush is repeatedly used, and after each use of the toothbrush, bacteria in the oral cavity are partially left on the bristles. The bacteria on the bristles are difficult to be washed away by water, and the bristles are wet during tooth brushing, which is easy to cause bacteria fermentation. Therefore, the toothbrush carries bacteria when it is used again. SUMMARY

[0005] In order to reduce the bacteria carried by the toothbrush after use, the present application provides a bacteria-removing toothbrush.

[0006] The bacteria-removing toothbrush provided by the present application adopts the following technical solution:

[0007] A bacteria-removing toothbrush includes a brush head assembly, a brush rod assembly, and a bacteria-removing assembly connected to the brush rod assembly. The brush head assembly includes a brush head piece and an extension sub-rod connected to the brush head piece. The brush rod assembly includes an extension master rod and an extension control part. The extension control part is used to control the extension of the extension sub-rod along the extension master rod. The brush rod assembly is provided with a bacteria-removing position. The brush head piece and the extension sub-rod can be overlapped or misaligned with the bacteria-removing position. The bacteria-removing assembly is used to remove bacteria from the brush head piece or the extension sub-rod placed in the bacteria-removing position.

[0008] By adopting the above technical scheme, the telescopic control component can control the extension length of the telescopic sub-shaft along the telescopic main-shaft, and the user can adjust the telescopic length of the telescopic sub-shaft according to own needs. After brushing teeth, bacteria may exist on the brush head and the telescopic sub-shaft in the oral cavity. The sterilization assembly is opened, and then the telescopic control component controls the telescopic sub-shaft to reciprocate along the telescopic main-shaft. The brush head and the telescopic sub-shaft overlap the sterilization position for multiple times, so that the sterilization assembly can effectively sterilize the brush head and the brush rod, thereby reducing the bacteria on the bristles of the toothbrush after use. In addition, when the sterilization toothbrush is not used, the telescopic control component controls the telescopic sub-shaft to retract along the telescopic main-shaft to the maximum extent. The space occupation rate of the sterilization toothbrush is small, and the sterilization toothbrush is convenient to carry or store.

[0009] Preferably, the telescopic control component is rotationally connected to one end of the telescopic main-shaft close to the telescopic sub-shaft, the telescopic control component is threadedly connected with the telescopic sub-shaft, and when the telescopic control component rotates relative to the telescopic main-shaft, the telescopic sub-shaft extends or retracts along the telescopic main-shaft.

[0010] By adopting the above technical scheme, the telescopic control component and the telescopic sub-shaft are threadedly connected, the telescopic control component can steplessly adjust the telescopic length of the telescopic sub-shaft, and the user can adjust the telescopic control component according to own preferences, so that the telescopic sub-shaft extends to an arbitrary length along the telescopic main-shaft. When the sterilization assembly is opened, the telescopic control component can adjust the telescopic sub-shaft to be placed at the sterilization position, so as to achieve more accurate sterilization effect.

[0011] Preferably, a dissolving cavity is formed in one end of the telescopic control component away from the telescopic main-shaft, and the sterilization position is arranged in the dissolving cavity.

[0012] By adopting the above technical scheme, when the brush head is placed in the dissolving cavity, the sterilization assembly can better sterilize the brush head. After sterilization, the brush head is placed in the dissolving cavity, and clean water is added into the dissolving cavity, so as to clean the brush head.

[0013] Preferably, the sterilization assemblies are uniformly distributed in the circumferential direction along the rotation axis of the telescopic control component, and the telescopic control component drives the sterilization assemblies to rotate when the telescopic control component rotates.

[0014] By adopting the above technical scheme, when the telescopic control component rotates relative to the telescopic sub-shaft, the sterilization assemblies also rotate with the telescopic control component, so as to realize multi-angle sterilization of the telescopic sub-shaft, thereby improving the sterilization efficiency and further reducing the bacteria on the bristles of the toothbrush after use. Meanwhile, the sterilization assemblies are uniformly distributed in the circumferential direction along the rotation axis of the telescopic control component, so that the sterilization assemblies can simultaneously perform multi-angle sterilization on the telescopic sub-shaft or the brush head, thereby further improving the sterilization rate.

[0015] Preferably, the vibration generating assembly is arranged in the telescopic female rod.

[0016] By adopting the above technical scheme, when the vibration generating assembly generates vibration, the telescopic female rod is driven to vibrate, then the telescopic male rod is driven to vibrate, and finally the vibration is transmitted to the brush head piece. During tooth brushing, the brush head piece can better clean the oral cavity through vibration. Adjusting the telescopic amount of the telescopic male rod along the telescopic female rod can change the distance from the brush head piece to the position where the telescopic male rod and the telescopic female rod are threadedly connected, so as to change the torque of vibration transmission between the telescopic female rod and the telescopic male rod, and finally adjust the vibration effect of the brush head piece. In addition, the brush head piece is arranged at the sterilization position. During the sterilization process of the brush head piece by the sterilization assembly, the vibration generating assembly can drive the brush head assembly to vibrate, so that the residual bacteria residues and residual toothpaste on the brush head piece are separated from the brush head piece, thereby further improving the cleaning effect of the brush head piece and reducing the possibility of bacteria breeding on the brush head piece.

[0017] Preferably, the telescopic control component is provided with a dissolving cavity at one end away from the telescopic female rod, the sterilization position is arranged in the dissolving cavity, and a bristle contact piece is protruded on the inner wall of the dissolving cavity. When the brush head piece is arranged in the dissolving cavity, the bristle contact piece contacts the bristles on the brush head piece.

[0018] By adopting the above technical scheme, when the brush head piece is arranged at the sterilization position, the bristles on the brush head piece contact the bristle contact piece. During the vibration of the vibration generating assembly, the bristle contact piece directly drives the bristles on the brush head piece to vibrate, thereby further improving the proportion of residual bacteria residues and residual toothpaste on the brush head piece, improving the sterilization efficiency, and improving the cleaning effect of the brush head piece.

[0019] Preferably, the telescopic female rod is provided with a guide groove at one end close to the telescopic control component, the guide groove is used for guiding the telescopic male rod, the vibration generating assemblies are uniformly distributed in the circumferential direction along the axis direction of the telescopic female rod, and the vibration generating assemblies are arranged on the inner wall of the guide groove.

[0020] By adopting the above technical scheme, along the axis direction of the telescopic female rod, the telescopic male rod partially overlaps the vibration generating assemblies, and the vibration generating assemblies are uniformly distributed in the circumferential direction along the axis direction of the telescopic female rod. The vibration generating assemblies can directly drive the telescopic male rod to vibrate, thereby improving the vibration transmission efficiency, improving the comfort of the user, and improving the proportion of residual bacteria residues and residual toothpaste. In addition, when the telescopic male rod is telescoped along the telescopic female rod, the direct contact section of the telescopic male rod and the vibration generating assemblies changes, so that the vibration effect of the brush head piece can be better adjusted through the extension length of the telescopic male rod.

[0021] Preferably, the brush rod assembly further comprises a water absorption member connected to the telescopic control component, the telescopic control component is provided with a threaded hole in the direction of the rotation axis, and the water absorption member is arranged at the opening of the threaded hole and used for absorbing liquid on the telescopic sub-rod.

[0022] By adopting the above technical solution, after the telescopic sub-rod completes the sterilization step, the telescopic sub-rod needs to be cleaned, and then the telescopic sub-rod is retracted along the telescopic main rod. During the retracting process of the telescopic sub-rod, the water absorption member can absorb water on the telescopic sub-rod, so that the part of the telescopic sub-rod retracted into the telescopic main rod remains dry, and the possibility of bacterial growth is reduced.

[0023] Preferably, the water absorption member is a water absorption sponge, and the water absorption member is detachably connected to the telescopic control component.

[0024] By adopting the above technical solution, the water absorption sponge can absorb more liquid on the telescopic sub-rod, and the water absorption sponge can also be replaced, so that the cleaning effect of the telescopic sub-rod is better.

[0025] Preferably, the brush head member is detachably connected to the telescopic sub-rod.

[0026] By adopting the above technical solution, the user can replace the used brush head member with a new brush head member or replace the brush head member of a different model.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The telescopic control component can control the extension length of the telescopic sub-rod along the telescopic main rod, and the user can adjust the telescopic length of the telescopic sub-rod according to his own needs. After brushing teeth, bacteria may exist on the brush head and the telescopic sub-rod in the oral cavity. The sterilization assembly is opened, and then the telescopic control component controls the reciprocating movement of the telescopic sub-rod along the telescopic main rod. The brush head member and the telescopic sub-rod overlap the sterilization position multiple times, so that the sterilization assembly can effectively sterilize the brush head member and the brush rod member, thereby reducing the bacteria on the bristles of the toothbrush after use. In addition, when the sterilization toothbrush is not used, the telescopic control component controls the telescopic sub-rod to retract along the telescopic main rod to the maximum extent, the space occupation rate of the sterilization toothbrush is small, and the sterilization toothbrush is convenient to carry or store.

[0029] 2. The telescopic control component and the telescopic sub-rod are connected through threads, the telescopic control component can steplessly adjust the telescopic length of the telescopic sub-rod, the user can adjust the telescopic control component according to his own preference, so that the telescopic sub-rod can extend to any length along the telescopic main rod. When the sterilization assembly is opened, the telescopic control component can adjust the telescopic sub-rod to be placed at the sterilization position in any section, so as to achieve a more precise sterilization effect.

[0030] 3. When the vibration generating assembly generates vibration, the vibration is transmitted to the telescopic mother rod, then to the telescopic son rod, and finally to the brush head assembly, so that the brush head assembly can better clean the oral cavity through vibration during tooth brushing; adjusting the telescopic amount of the telescopic son rod along the telescopic mother rod can change the distance from the brush head assembly to the position where the telescopic son rod and the telescopic mother rod are threadedly connected, so as to change the torque of vibration transmission between the telescopic mother rod and the telescopic son rod, and finally adjust the vibration effect of the brush head assembly. In addition, the brush head assembly is placed in the sterilization position, and during the sterilization process of the brush head assembly by the sterilization assembly, the vibration generating assembly can drive the brush head assembly to vibrate, so that the bacteria residues and residual toothpaste remaining on the brush head assembly are separated from the brush head assembly, further improving the cleaning effect of the brush head assembly and reducing the possibility of bacteria breeding on the brush head assembly. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a side view of a sterilization toothbrush.

[0032] Figure 2 is a sectional view of a sterilization toothbrush.

[0033] Figure 3 is a sectional view in the direction of A.

[0034] Figure 4 is a sectional view of the brush head assembly placed in the dissolving cavity.

[0035] BRIEF DESCRIPTION OF DRAWINGS: 1, brush head assembly; 11, brush head assembly; 12, telescopic son rod; 121, guide; 2, brush rod assembly; 21, telescopic mother rod; 211, guide groove; 22, telescopic control component; 221, dissolving cavity; 222, bristle contact; 23, end cover; 24, water absorption component; 25, sterilization position; 3, sterilization assembly; 4, vibration generating assembly; 41, vibration component; 42, power supply component. DETAILED DESCRIPTION

[0036] The application will be further described in detail below in combination with all the drawings.

[0037] The application discloses a sterilization toothbrush.

[0038] Referring to Figure 1 and 2 , a sterilization toothbrush comprises a brush rod assembly 2, a brush head assembly 1 capable of telescoping along the brush rod assembly 2, a sterilization assembly 3 for sterilizing the brush head assembly 1, and a vibration generating assembly 4 for generating vibration, wherein the sterilization assembly 3 and the vibration generating assembly 4 are both connected to the brush rod assembly 2.

[0039] Referring to Figure 1 and 2, specifically, the brush head assembly 1 includes a brush head piece 11 for cleaning the oral cavity and a telescopic sub-shaft 12 capable of moving relative to the brush rod assembly 2, the brush head piece 11 is detachably connected to the telescopic sub-shaft 12, in this embodiment, the brush head piece 11 is connected to the telescopic sub-shaft 12 by screwing, in other embodiments, the brush head piece 11 can also be clamped or inserted with the telescopic sub-shaft 12, when the brush head piece 11 is inserted with the telescopic sub-shaft 12, the brush head piece 11 is provided with a plug-in head, and the telescopic sub-shaft 12 is provided with a plug-in slot, and the plug-in head and the plug-in slot are in interference fit.

[0040] Referring to Figure 2 and 4 , the brush rod assembly 2 includes a telescopic female shaft 21 adapted to the telescopic sub-shaft 12, a telescopic control component 22 for controlling the telescopic movement of the telescopic sub-shaft 12 relative to the telescopic female shaft 21, a water absorption piece 24 for absorbing liquid on the surface of the telescopic sub-shaft 12, and a sterilization site 25, wherein the telescopic control component 22 is threadedly connected with the telescopic sub-shaft 12, and during the telescopic movement of the telescopic sub-shaft 12 along the telescopic female shaft 21, the brush head piece 11 and the telescopic sub-shaft 12 can be overlapped or misaligned with the sterilization site 25, and when the sterilization assembly 3 is turned on, the sterilization assembly 3 can sterilize the brush head piece 11 or the telescopic sub-shaft 12 placed on the sterilization site 25. Therefore, the sterilization assembly 3 can sterilize the telescopic sub-shaft 12 and the brush head piece 11 respectively, reduce the bacteria on the bristles of the toothbrush after use, and the user can adjust the extension length of the telescopic sub-shaft 12 according to the comfort level.

[0041] Referring to Figure 2 and 3 , specifically, the telescopic female shaft 21 is a cylinder, the telescopic female shaft 21 is provided with a guide groove 211 at one end close to the telescopic sub-shaft 12, the guide groove 211 is a cylinder, and the guide groove 211 is coaxially arranged with the telescopic female shaft 21. The vibration generating assembly 4 includes a vibration component 41 and a power supply component 42 for providing energy to the vibration component 41, in this embodiment, the number of vibration components 41 is four, and in other embodiments, the number of vibration components 41 can also be other integers greater than one. The vibration component 41 is a strip, the length of the vibration component 41 is adapted to the depth of the guide groove 211, there is a gap between two adjacent vibration components 41, the vibration component 41 is connected to the inner wall of the guide groove 211, the vibration components 41 are uniformly distributed in the circumferential direction along the axis of the telescopic female shaft 21, and the four vibration components 41 form a ring in the direction of the axis of the telescopic female shaft 21.

[0042] Referring to Figure 2 and 3In addition, the telescopic sub-rod 12 is provided with four guide members 121 at the end away from the brush head 11, the guide members 121 protrude along the side wall of the telescopic sub-rod 12, the guide members 121 are uniformly distributed along the axis of the telescopic sub-rod 12, the outer diameter of the section of the telescopic sub-rod 12 provided with the guide members 121 is adapted to the inner diameter of the annular ring surrounded by the four vibration members 41, the width of the guide members 121 is adapted to the gap width between the adjacent two vibration members 41, the telescopic sub-rod 12 is inserted into the guide groove 211 along the inner diameter of the annular ring surrounded by the four vibration members 41, and the gap between the guide members 121 and the vibration members 41 corresponds one by one.

[0043] Through the above structure, the telescopic sub-rod 12 is clamped by the annular ring surrounded by the four vibration members 41, and the two adjacent vibration members 41 limit the guide members 121, so that the vibration members 41 guide the telescopic sub-rod 12, and the cooperation between the vibration members 41 and the guide members 121 makes the telescopic sub-rod 12 not easy to rotate relative to the telescopic main rod 21, thereby improving the stability of the scheme. At the same time, the contact area between the vibration members 41 and the telescopic sub-rod 12 is larger; the vibration assembly can transmit axial vibration to the telescopic sub-rod 12 through the outer wall of the telescopic sub-rod 12, and the vibration members 41 can transmit circumferential vibration to the telescopic sub-rod 12 through the guide members 121, so that when the vibration members 41 drive the telescopic sub-rod 12 to vibrate, the telescopic sub-rod 12 simultaneously generates axial and circumferential vibration, the vibration effect is better, and finally the brush head 11 can better clean the oral cavity. In addition, since the vibration members 41 transmit vibration to the telescopic sub-rod 12 by transmitting force, the length of the telescopic sub-rod 12 placed in the guide groove 211 changes during the telescoping process along the telescopic main rod 21, which can change the moment of force of the vibration members 41 acting on the telescopic sub-rod 12, thereby changing the vibration amplitude of the brush head 11. Therefore, by controlling the telescoping of the telescopic sub-rod 12 relative to the telescopic main rod 21 through the telescopic control member 22, the vibration amplitude of the brush head 11 can also be adjusted, and finally the comfort degree during oral cleaning is adjusted.

[0044] Referring to Figure 2 and 4 , specifically, the telescopic control member 22 is a cylinder, the telescopic control member 22 is rotationally connected to the end face of the telescopic main rod 21 provided with the guide groove 211 through a bearing, and the end of the telescopic control member 22 away from the telescopic main rod 21 is provided with a cylindrical accommodation cavity 221, the accommodation cavity 221 is coaxially arranged with the telescopic control member 22, and the sterilization site 25 is arranged in the accommodation cavity 221. The sterilization assembly 3 is connected to the inner wall of the accommodation cavity 221, and the sterilization assembly 3 is uniformly distributed in the circumferential direction along the axis of the accommodation cavity 221; in this embodiment, the sterilization assembly 3 is an ultraviolet light generator, and in other embodiments, the sterilization assembly 3 can also be an ultrasonic sterilizer or other sterilization equipment.

[0045] Referring to Figure 2 and 4, the telescopic control component 22 is also provided with a threaded hole coaxial with the telescopic control component 22, and the telescopic sub-rod 12 is also provided with an external thread adapted to the threaded hole on the outer wall thereof; in the direction close to the brush head component 11, the telescopic sub-rod 12 is sequentially provided with a section of the guide 121 and a section of the external thread. In addition, the water absorption component 24 is a ring-shaped water absorption sponge provided with an opening in the circumferential direction, and the water absorption component 24 is provided with double-sided adhesive tape on one end surface thereof and is attached to the bottom of the dissolving cavity 221 by the double-sided adhesive tape; when the water absorption component 24 needs to be replaced, the water absorption component 24 only needs to be torn off along the bottom of the dissolving cavity 221 and a new water absorption component 24 is attached to the bottom of the dissolving cavity 221.

[0046] With reference to Figure 2 and 4 , the inner wall of the dissolving cavity 221 is protruded to form a bristle contact component 222 made of a light-transmitting material; when the brush head assembly 1 is placed in the dissolving cavity 221, the end of the bristles on the brush head component 11 can abut against the bristle contact component 222. The telescopic control component 22 is also provided with an end cover component 23 rotatably connected to the telescopic control component 22 by a hinge connection, and the end cover component 23 can cover the dissolving cavity 221 along the opening of the dissolving cavity 221.

[0047] Through the above structure, when the telescopic control component 22 rotates, the telescopic control component 22 drives the telescopic sub-rod 12 to move along the axis direction of the threaded hole through the cooperation of the internal and external threads, so that the telescopic sub-rod 12 extends or retracts along the telescopic main rod 21; under the action of the bearing, the resistance to rotation of the telescopic control component 22 is small, which is more labor-saving and easy to operate. In addition, the telescopic control component 22 can drive the sterilization assembly 3 to rotate along the axis direction of the telescopic sub-rod 12 while controlling the telescopic sub-rod 12 to extend or retract along the telescopic main rod 21, which can sterilize the telescopic sub-rod 123 by 360° without dead angle and improve the sterilization efficiency; at the same time, the water absorption sponge can absorb the liquid on the outer wall of the telescopic sub-rod 12 during the retraction of the telescopic sub-rod 12 along the telescopic main rod 21, which reduces the possibility of bacterial growth.

[0048] In addition, when the brush head assembly 1 is placed in the dissolving cavity 221, the sterilization assembly circumferentially distributed along the axis of the dissolving cavity 221 can more efficiently sterilize the brush head component 11; after sterilization is completed, clean water is poured into the dissolving cavity 221, and then the vibration generating assembly 4 is turned on, which can drive the bristles on the brush head component 11 to vibrate, so that the residual bacteria and toothpaste adhering to the bristles are separated from the bristles; at the same time, under the action of the bristle contact component 222, both ends of the bristles vibrate, so that the bristles vibrate more violently, which improves the falling rate of the residual bacteria and toothpaste, finally removes the bacteria on the bristles to the greatest extent and makes the organic matter adhering to the bristles fall off, thereby reducing the possibility of bacterial growth.

[0049] In conclusion, in the process of cleaning the oral cavity, the user can rotate the telescopic control component 22 to adjust the extension length of the telescopic sub-rod 12, so that the telescopic sub-rod 12 is at a length comfortable for the user; in the process of extension of the telescopic sub-rod 12, the vibration component 41 plays a guiding role on the telescopic sub-rod 12, and the vibration component 41 can better transmit the vibration to the telescopic sub-rod 12 through the guide 121, so that the brush head component 11 can have a better cleaning effect on the oral cavity; in addition, when the extension length of the telescopic sub-rod 12 changes, the torque of the force transmitted by the vibration component 41 to the telescopic sub-rod 12 changes, and the vibration effect of the brush head component 11 also changes, so that the user can also adjust the vibration effect of the brush head component 11 through the telescopic control component 22.

[0050] After the oral cavity is cleaned, the telescopic sub-rod 12 also partially extends into the oral cavity, so that the telescopic sub-rod 12 also has bacteria, residual toothpaste and liquid; the sterilization assembly 3 is opened, the telescopic control component 22 is rotated to drive the telescopic sub-rod 12 to retract along the telescopic main rod 21, in this process, the sterilization assembly can sterilize the telescopic sub-rod 12; at the same time, when the telescopic sub-rod 12 passes through the water absorption component 24, the water absorption component 24 can absorb the residual toothpaste and liquid adhered to the telescopic sub-rod 12, reducing the possibility of bacterial growth; finally, when the brush head component 11 is placed in the dissolving cavity 221, the sterilization assembly 3 can sterilize the brush head component 11, after sterilization, the vibration generating assembly 4 is opened, the residual material adhered to the brush head component 11 falls off, and under the action of the bristle contact component 222, the falling rate of the residual material on the bristles is higher, and finally clean water is added to the dissolving cavity 221 to clean the brush head component 11. Through the above process, not only the brush head assembly 1 is efficiently sterilized, but also the residual organic matter on the brush head assembly 1 is largely cleaned, reducing the possibility of bacterial growth.

[0051] The implementation principle of the sterilization toothbrush is: during the process of cleaning the oral cavity, first open the end cover 23, then rotate the telescopic control component 22, the telescopic sub-rod 12 extends along the telescopic main rod 21 to an appropriate length, and then the oral cavity is cleaned; after the oral cavity is cleaned, the sterilization assembly 3 is opened, the telescopic control component 22 is rotated, the telescopic sub-rod 12 slowly retracts along the telescopic main rod 21, when the brush head component 11 is placed in the sterilization position 25, clean water is added to the dissolving cavity 221 to clean the brush head component 11 and pour out the water in the dissolving cavity 221, and finally the vibration generating assembly 4 and the sterilization assembly 3 are closed, and the end cover 23 is covered.

[0052] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A germicidal toothbrush characterized by: The utility model provides a brush head assembly (1), brush rod assembly (2) and the sterilization assembly (3) of connection in brush rod assembly (2), brush head assembly (1) includes brush head piece (11) and the telescopic sub -rod (12) of connection in brush head piece (11), brush rod assembly (2) includes telescopic female rod (21) and telescopic control part (22), and telescopic control part (22) is used for controlling telescopic sub -rod (12) telescopic along telescopic female rod (21), and brush rod assembly (2) is equipped with sterilization position (25), and brush head piece (11) and telescopic sub -rod (12) can overlap or misposition with sterilization position (25), and sterilization assembly (3) is used for carrying out sterilization to brush head piece (11) or telescopic sub -rod (12) of being placed in sterilization position (25). Telescopic control part (22) is rotatably connected to one end of telescopic female rod (21) close to telescopic sub -rod (12), and telescopic control part (22) is threadedly connected with telescopic sub -rod (12), when telescopic control part (22) rotates relative to telescopic female rod (21), telescopic sub -rod (12) extends or retracts along telescopic female rod (21). Telescopic control part (22) is provided with a solution cavity (221) away from one end of telescopic female rod (21), and sterilization position (25) is arranged in the solution cavity (221). Further comprising a vibration generating assembly (4) arranged in the telescopic female rod (21). The brush rod assembly (2) further comprises a water absorbing member (24) connected to the telescopic control part (22), and the telescopic control part (22) is provided with a threaded hole in the direction of the rotation axis, and the water absorbing member (24) is arranged at the opening of the threaded hole, and the water absorbing member (24) is used for absorbing liquid on the telescopic sub -rod (12).

2. A germ-free toothbrush according to claim 1, characterized in that: The sterilization assembly (3) is uniformly distributed in the circumferential direction of the rotation axis of the telescopic control part (22), and the rotation of the telescopic control part (22) drives the rotation of the sterilization assembly (3).

3. The germ-free toothbrush according to claim 1, wherein: The inner wall of the solution cavity (221) is provided with a brush hair contact member (222), and when the brush head piece (11) is placed in the solution cavity (221), the brush hair contact member (222) contacts the brush hair on the brush head piece (11).

4. The germ-free toothbrush according to claim 1, wherein: The telescopic female rod (21) is provided with a guide groove (211) at one end close to the telescopic control part (22), and the guide groove (211) is used for guiding the telescopic sub -rod (12), and the vibration generating assembly (4) is uniformly distributed in the circumferential direction of the axis of the telescopic female rod (21), and the vibration generating assembly (4) is arranged on the inner wall of the guide groove (211).

5. The germ-free toothbrush according to claim 1, wherein: The water absorbing member (24) is a water absorbing sponge, and the water absorbing member (24) is detachably connected to the telescopic control part (22).

6. The germ-free toothbrush according to claim 1, wherein: The brush head piece (11) is detachably connected to the telescopic sub -rod (12).

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