An electric toothbrush

Abstract

The present invention discloses an electric toothbrush, which relates to the field of washing tools. The electric brush head includes: a mounting head, a brush rod, a bristle assembly, a connecting assembly and a transmission rod. The mounting head is connected to the brush rod, the mounting head is provided with a mounting cavity, the brush rod is provided with a power hole, and the power hole is connected to the mounting cavity; the bristle assembly includes bristles, a brush plate and an external part, the bristles and the external part are both connected to the brush plate, the brush plate is arranged in the mounting cavity and connected to the mounting head through the connecting assembly; the transmission rod is arranged in the power hole and is connected to the external part at one end away from the brush rod; the width of the power hole is greater than the width of the transmission rod, and a flexible connection layer is provided between the transmission rod and the inner wall of the power hole. The electric toothbrush head disclosed by the present invention is more comfortable to use, the transmission rod is used to transmit power, the thickness of the mounting head is reduced, and the teeth can be cleaned deeply; when replacing the bristle assembly, there is no need to completely replace the electric brush head, which reduces the use cost of the electric toothbrush.

Description

Technical Field

[0001] The invention relates to the field of washing tools, in particular to an electric toothbrush. Background Art

[0002] It is difficult to remove dental plaque with a traditional toothbrush. If you use a traditional toothbrush and adopt an improper way to brush your teeth, the cleaning effect of the traditional toothbrush will be greatly reduced, and it may even cause serious damage to the gums and teeth. With the advancement of technology, people's requirements for living standards are constantly improving. Electric toothbrushes have gradually been recognized by the market because they can avoid the harm of traditional toothbrushes and bring fun and enjoyment to people.

[0003] In the prior art, electric toothbrushes are not very comfortable to use and the cost of replacing brush heads is high; therefore, it is necessary to improve the prior art and propose more reasonable technical solutions to solve the problems existing in the prior art. Summary of the invention

[0004] The invention provides an electric toothbrush, which is used to solve the technical problems in the prior art that the electric toothbrush has low comfort level in use and high cost for replacing the brush head.

[0005] In the first aspect, an embodiment of the present invention provides an electric brush head, comprising: a mounting head, a brush rod, a bristle assembly, a connecting assembly and a transmission rod, the mounting head is connected to the brush rod, the mounting head is provided with a mounting cavity, the brush rod is provided with a power hole, and the power hole is connected to the mounting cavity; the bristle assembly comprises bristles, a brush plate and an external component, the bristles and the external component are both connected to the brush plate, the brush plate is arranged in the mounting cavity and connected to the mounting head through the connecting assembly; the transmission rod is arranged in the power hole and is connected to the external component at one end away from the brush rod; the width of the power hole is greater than the width of the transmission rod, and a flexible connecting layer is provided between the transmission rod and the inner wall of the power hole.

[0006] In an embodiment of the present invention, the brush plate is disposed in the installation cavity and connected to the installation head through a connecting assembly. When the transmission rod is driven by the power assembly to swing at high speed, the brush plate can be driven to swing at high speed in the installation cavity through the external connection member, thereby driving the bristles connected to the brush plate to clean the teeth. In order to ensure that the end of the transmission rod close to the brush plate can swing in the installation cavity, the width of the power hole should be greater than the width of the transmission rod. At the same time, in order to ensure that the transmission rod does not deviate in the power hole, a flexible connection layer should be provided on the outer wall of the transmission rod, and the position of the transmission rod is limited by the flexible connection layer, and when the transmission rod swings at high speed, it will not be separated from the external connection member.

[0007] The electric toothbrush head disclosed in the present invention has a mounting head that does not rotate during use, and is more comfortable to use than the electric toothbrush head in the prior art; moreover, the mounting head can be set to different shapes without affecting the brushing experience. Since the transmission rod is used to transmit power, the thickness of the mounting head is reduced, and the teeth can be cleaned deeply; when replacing the bristle assembly, the electric toothbrush head does not need to be completely replaced, which reduces the use cost of the electric toothbrush.

[0008] Preferably, the flexible connection layer is a silicone layer, and the silicone layer is sleeved on the outer circumference of the transmission rod.

[0009] The flexible connection layer is mainly used to restrict the transmission rod in the power hole, and the transmission rod can swing in the power hole under the drive of the driving component, and then drive the brush plate to swing through the connection component through the external component. At the same time, the silicone layer can also prevent moisture or dirt from the electric brush head from entering the brush handle.

[0010] Preferably, the electric brush head further comprises a waterproof layer, which is arranged between the bristle assembly and the mounting head.

[0011] The waterproof layer is mainly used to prevent external moisture or dirt from entering the installation cavity through the gap between the bristle assembly and the installation head; the waterproof layer can be made of silicone material. It is clear that the waterproof layer should have a certain degree of flexibility and should not prevent the bristle assembly from swinging through the connecting assembly.

[0012] Preferably, the bristle assembly is detachably connected to the mounting head via a connecting assembly.

[0013] The bristle assembly can be detachably connected to the mounting head through the connecting assembly, which is convenient for the installation and production of the bristle assembly. It is clear that by setting the connecting assembly, the brush plate can be pressed into the mounting cavity by pressing the bristle assembly, and the external connector is connected to the transmission rod; at the same time, when the bristle assembly needs to be replaced, a certain pulling force is applied to the bristles of the bristle assembly, and the brush plate can be pulled out and replaced through the external connector 183. Among them, the waterproof layer can be connected to the brush plate, so that the waterproof layer can be replaced at the same time as the bristle assembly is replaced; of course, the waterproof layer can also be connected to the inner wall of the mounting head, and there is no need to replace the waterproof layer when replacing the bristle assembly.

[0014] Preferably, the connecting assembly comprises: a recessed structure provided on the brush plate, and a convex structure provided on the inner wall of the mounting head and matching with the recessed structure.

[0015] In order to facilitate the installation or replacement of the bristle assembly, the connecting assembly includes a recessed structure provided on the brush plate and a convex structure provided on the inner wall of the mounting head; the recessed structure and the convex structure are made of flexible material, so that when the bristle assembly is pressed, the bristle assembly can be connected to the mounting head through the adaptation of the recessed structure and the convex structure.

[0016] Preferably, the concave structure is a transversely arranged groove, and the convex structure is a convex strip matching the groove; the transmission rod is driven by the transmission rod through the external component to slide along the convex strip through the groove.

[0017] In order to allow the bristle assembly to swing left and right on the mounting head when the transmission rod swings, thereby improving the comfort and effect of cleaning the oral cavity, the concave structure is a transversely arranged groove, and the convex structure is a convex strip. The transmission rod is driven by the transmission rod through the external member to slide along the convex strip through the groove. It is clear that the concave structure and the convex structure can be columnar structures, and under the drive of the transmission rod, the concave structure and the convex structure can be matched to swing left and right around the connecting assembly, thereby cleaning the oral cavity.

[0018] Preferably, the external connection part is a protrusion arranged at the bottom of the brush plate, the transmission rod is provided with an external connection hole matching the protrusion, and the protrusion is connected to the transmission rod through the external connection hole.

[0019] In order to facilitate the connection between the external part and the transmission rod; at the same time, when the bristle assembly is removed from the mounting head, the external part is easy to separate from the transmission rod. The external part can be a protrusion arranged at the bottom of the brush plate, and the transmission rod is provided with an external hole matching the protrusion, and the external hole is adapted to the protrusion.

[0020] In a second aspect, an embodiment of the present invention provides an electric toothbrush, comprising a brush handle, a power assembly, an adjusting member, and the electric brush head disclosed in the above embodiment, wherein the adjusting member is arranged on the brush rod; wherein the electric brush head is detachably connected to the brush handle;

[0021] The power assembly is connected to the transmission rod and is used to drive the transmission rod to swing in the power hole with the adjustment member as a fulcrum.

[0022] The brush handle is provided to facilitate holding the brush handle to clean the teeth and improve the grip; at the same time, the adjustment member is provided mainly to adjust the swing amplitude of the bristle assembly in the mounting head. It is clear that since a waterproof layer is provided between the bristle assembly and the mounting cavity, a certain swing space is reserved, and the waterproof layer can be made of silicone material, so that the bristle assembly can adjust the swing amplitude through the adjustment member in the swing space under the drive of the transmission rod, thereby cleaning the teeth.

[0023] Preferably, the adjusting member includes one or more groups of buttons; the brush rod is provided with a button hole, and the button is connected to the brush rod through the button hole; wherein,

[0024] The button is provided with a positioning protrusion, and the transmission rod is provided with a positioning hole matching the positioning protrusion. The positioning protrusion is used as a fulcrum of the transmission rod when the power component drives the transmission rod to rotate.

[0025] In order to adjust the swing arc of the bristle assembly in the installation cavity, multiple groups of buttons are set, and the buttons are connected to the brush rod through the button holes. Multiple groups of buttons can be set, specifically according to the length of the transmission rod and the width of the power hole, and the transmission rod must be made of high-strength hard material. The button is set on the brush rod, and the button is provided with a positioning protrusion, and the transmission rod is provided with a positioning hole matching the positioning protrusion. When the positioning protrusion is pressed into the corresponding positioning hole, the positioning protrusion position corresponding to the button can be used as the fulcrum for the swing of the transmission rod, thereby adjusting the swing arc of the transmission rod close to one end of the bristle assembly, thereby controlling the swing strength and amplitude of the bristle assembly.

[0026] Preferably, the power assembly includes a motor, a transmission member and a limit bearing, the transmission member is connected to the inner wall of the brush handle through the limit bearing, the transmission rod is provided with a transmission hole, and the distance of the transmission hole in the extension direction of the transmission rod is smaller than the distance perpendicular to the direction of the transmission rod; wherein,

[0027] The transmission member is provided with a supporting structure, which is used to sequentially support the two side walls of the transmission hole perpendicular to the direction of the transmission rod when the transmission member rotates under the drive of the motor, and drive the transmission rod to swing with the positioning protrusion as the fulcrum.

[0028] The power assembly includes a motor, a transmission member and a limit bearing. The limit bearing is used to limit the position of the transmission member, and drives the transmission member to rotate at high speed under the action of the motor. When the transmission member rotates at high speed, the supporting structure arranged on the outer wall of the transmission member squeezes the two side walls of the transmission hole in turn, thereby driving the transmission rod to rotate at high speed with the button as a fulcrum, thereby cleaning the teeth. The electric toothbrush disclosed in the present invention only swings the bristle assembly during use, and the mounting head does not swing, which is highly comfortable to use; at the same time, since the transmission rod is used to transmit power, the thickness of the mounting head is reduced, and the teeth can be deeply cleaned; when replacing the bristle assembly, there is no need to completely replace the electric brush head, which reduces the cost of using the electric toothbrush.

[0029] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 A schematic diagram of the structure of an electric toothbrush provided by an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of the structure of a transmission rod provided by an embodiment of the present invention;

[0033] Figure 3 An enlarged view of a part A of an electric toothbrush provided by an embodiment of the present invention;

[0034] Figure 4 An enlarged view of a part B of the electric toothbrush provided in an embodiment of the present invention;

[0035] Figure 5 An enlarged view of a part C of an electric toothbrush provided by an embodiment of the present invention;

[0036] Figure 6 An enlarged view of a part D of the electric toothbrush provided by an embodiment of the present invention;

[0037] Figure 7 A partial cross-sectional view of an electric toothbrush provided by an embodiment of the present invention;

[0038] Figure 8 A partial cross-sectional view of an electric toothbrush provided in an embodiment of the present invention.

[0039] Icons: 10-electric brush head; 16-mounting head; 17-brush rod; 18-bristle assembly; 19-connecting assembly; 20-transmission rod; 21-installation cavity; 22-power hole; 181-bristles; 182-brush plate; 183-external parts; 24-flexible connection layer; 241-silicone layer; 25-waterproof layer; 26-recessed structure; 27-convex structure; 29-external hole; 1-electric toothbrush; 11-brush handle; 12-power assembly; 13-adjusting part; 30-button; 31-button hole; 32-positioning protrusion; 33-positioning hole; 121-motor; 122-transmission part; 123-limit bearing; 124-transmission hole; 125-supporting structure. DETAILED DESCRIPTION

[0040] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] See also Figures 1 to 8 , an electric brush head 10 provided by an embodiment of the present invention comprises: a mounting head 16, a brush rod 17, a bristle assembly 18, a connecting assembly 19 and a transmission rod 20, the mounting head 16 is connected to the brush rod 17, the mounting head 16 is provided with a mounting cavity 21, the brush rod 17 is provided with a power hole 22, and the power hole 22 is communicated with the mounting cavity 21; the bristle assembly 18 comprises bristles 181, a brush plate 182 and an external component 183, the bristles 181 and the external component 183 are both connected to the brush plate 182, the brush plate 182 is arranged in the mounting cavity 21 and connected to the mounting head 16 through the connecting assembly 19; the transmission rod 20 is arranged in the power hole 22 and is connected to the external component 183 at one end away from the brush rod 17; the width of the power hole 22 is greater than the width of the transmission rod 20, and a flexible connecting layer 24 is provided between the transmission rod 20 and the inner wall of the power hole 22.

[0044] In the embodiment of the present invention, the brush plate 182 is disposed in the mounting cavity 21 and connected to the mounting head 16 through the connecting assembly 19. When the transmission rod 20 is driven by the power assembly 12 to swing at a high speed, the brush plate 182 can be driven to swing at a high speed in the mounting cavity 21 through the external connection 183, thereby driving the bristles 181 connected to the brush plate 182 to clean the teeth. In order to ensure that the end of the transmission rod 20 close to the brush plate 182 can swing in the mounting cavity 21, the width of the power hole 22 should be greater than the width of the transmission rod 20. At the same time, in order to ensure that the transmission rod 20 does not deviate in the power hole 22, a flexible connection layer 24 should be provided on the outer wall of the transmission rod 20, and the position of the transmission rod 20 is limited by the flexible connection layer 24, and when the transmission rod 20 swings at a high speed, it will not be separated from the external connection 183.

[0045] The electric brush head 10 disclosed in the present invention has a mounting head 16 that does not swing during use, and is more comfortable to use than the electric toothbrush head 1 in the prior art; and the mounting head 16 can be set to different shapes without affecting the brushing experience. In addition, since the transmission rod 20 is used to transmit power, the thickness of the mounting head 16 is reduced, and the teeth can be cleaned deeply; when replacing the bristle assembly 18, the electric brush head 10 does not need to be completely replaced, which reduces the use cost of the electric toothbrush 1.

[0046] Preferably, the flexible connection layer 24 is a silicone layer 241 , and the silicone layer 241 is sleeved on the outer circumference of the transmission rod 20 .

[0047] The flexible connection layer 24 is mainly used to restrict the transmission rod 20 in the power hole 22, and the transmission rod 20 can swing in the power hole 22 under the drive of the driving assembly, and then drive the brush plate 182 to swing through the connection assembly 19 through the external component 183. At the same time, the silicone layer 241 can also prevent moisture or dirt of the electric brush head 10 from entering the brush handle 11.

[0048] Preferably, the electric brush head 10 further includes a waterproof layer 25 , which is disposed between the bristle assembly 18 and the mounting head 16 .

[0049] The waterproof layer 25 is mainly used to prevent external moisture or dirt from entering the installation cavity 21 through the gap between the bristle assembly 18 and the installation head 16; the waterproof layer 25 can be made of silicone material. It is clear that the waterproof layer 25 should have a certain degree of flexibility and should not prevent the bristle assembly 18 from swinging through the connecting assembly 19.

[0050] Preferably, the bristle assembly 18 is detachably connected to the mounting head 16 via a connecting assembly 19 .

[0051] The bristle assembly 18 can be detachably connected to the mounting head 16 through the connecting assembly 19, which is convenient for the installation and production of the bristle assembly 18. It is clear that by setting the connecting assembly 19, the brush plate 182 can be pressed into the mounting cavity 21 by pressing the bristle assembly 18, and the external connector 183 is connected to the transmission rod 20; at the same time, when the bristle assembly 18 needs to be replaced, a certain pulling force is applied to the bristles 181 of the bristle assembly 18, and the brush plate 182 can be pulled out and replaced through the external connector 183. Among them, the waterproof layer 25 can be connected to the brush plate 182, so that the waterproof layer 25 can be replaced at the same time as the bristle assembly 18 is replaced; of course, the waterproof layer 25 can also be connected to the inner wall of the mounting head 16, and the waterproof layer 25 does not need to be replaced when the bristle assembly 18 is replaced.

[0052] Preferably, the connecting assembly 19 includes: a recessed structure 26 provided on the brush plate 182 , and a convex structure 27 provided on the inner wall of the mounting head 16 and matching with the recessed structure 26 .

[0053] In order to facilitate the installation or replacement of the bristle assembly 18, the connecting assembly 19 includes a recessed structure 26 provided on the brush plate 182 and a convex structure 27 provided on the inner wall of the mounting head 16; the recessed structure 26 and the convex structure 27 are made of flexible material, so that when the bristle assembly 18 is pressed, the bristle assembly 18 can be connected to the mounting head 16 through the adaptation of the recessed structure 26 and the convex structure 27.

[0054] Preferably, the concave structure 26 is a transversely arranged groove, and the convex structure 27 is a convex strip matching the groove; the transmission rod 20 is driven by the transmission rod 20 through the external component 183 to slide along the convex strip through the groove.

[0055] In order to allow the bristle assembly 18 to swing left and right on the mounting head 16 when the transmission rod 20 swings, thereby improving the comfort and effect of cleaning the oral cavity, the concave structure 26 is a transversely arranged groove, and the convex structure 27 is a convex strip. The transmission rod 20 is driven by the transmission rod 20 through the external connection member 183, and slides along the convex strip through the groove. It can be clearly seen that the concave structure 26 and the convex structure 27 can be columnar structures, and under the drive of the transmission rod 20, the concave structure 26 and the convex structure 27 can be matched to swing left and right around the connecting assembly 19, thereby cleaning the oral cavity.

[0056] Preferably, the external connection member 183 is a protrusion provided at the bottom of the brush plate 182 , and the transmission rod 20 is provided with an external connection hole 29 matching the protrusion, and the protrusion is connected to the transmission rod 20 through the external connection hole 29 .

[0057] In order to facilitate the connection between the external component 183 and the transmission rod 20; at the same time, when the bristle assembly 18 is removed from the mounting head 16, the external component 183 is conveniently separated from the transmission rod 20, the external component 183 can be a protrusion arranged at the bottom of the brush plate 182, and the transmission rod 20 is provided with an external hole 29 matching the protrusion, and the external hole 29 is adapted to the protrusion.

[0058] In a second aspect, an embodiment of the present invention provides an electric toothbrush 1, comprising a brush handle 11, a power assembly 12, an adjusting member 13 and the electric brush head 10 disclosed in the above embodiment, wherein the adjusting member 13 is arranged on a brush rod 17; wherein the electric brush head 10 is detachably connected to the brush handle 11;

[0059] The power assembly 12 is connected to the transmission rod 20 and is used to drive the transmission rod 20 to swing in the power hole 22 with the adjustment member 13 as a fulcrum.

[0060] The brush handle 11 is provided to facilitate holding the brush handle 11 to clean the teeth and improve the grip; at the same time, the adjustment member 13 is provided mainly for adjusting the swing amplitude of the bristle assembly 18 in the mounting head 16. It is clear that since a waterproof layer 25 is provided between the bristle assembly 18 and the mounting cavity 21, a certain swing space is reserved, and the waterproof layer 25 can be made of silicone material, so that the bristle assembly 18 can adjust the swing amplitude through the adjustment member 13 in the swing space under the drive of the transmission rod 20, thereby cleaning the teeth.

[0061] Preferably, the adjusting member 13 includes one or more groups of buttons 30; the brush rod 17 is provided with a button hole 31, and the button 30 is connected to the brush rod 17 through the button hole 31; wherein,

[0062] The button 30 is provided with a positioning protrusion 32 , and the transmission rod 20 is provided with a positioning hole 33 matching the positioning protrusion 32 . The positioning protrusion 32 is used as a fulcrum of the transmission rod 20 when the power assembly 12 drives the transmission rod 20 to rotate.

[0063] In order to adjust the swinging arc of the bristle assembly 18 in the installation cavity 21, multiple groups of buttons 30 are set, and the buttons 30 are connected to the brush rod 17 through the button holes 31. Multiple groups of buttons 30 can be set, specifically according to the length of the transmission rod 20 and the width of the power hole 22, and the transmission rod 20 should be made of high-strength hard material. The button 30 is set on the brush rod 17, and the button 30 is provided with a positioning protrusion 32, and the transmission rod 20 is provided with a positioning hole 33 matching the positioning protrusion 32. When the positioning protrusion 32 is pressed into the corresponding positioning hole 33, the position of the positioning protrusion 32 corresponding to the button 30 can be used as the fulcrum for the swing of the transmission rod 20, thereby adjusting the swinging arc of the transmission rod 20 close to one end of the bristle assembly 18, thereby controlling the swinging force and amplitude of the bristle assembly 18.

[0064] Preferably, the power assembly 12 includes a motor 121, a transmission member 122 and a limit bearing 123, the transmission member 122 is connected to the inner wall of the brush handle 11 through the limit bearing 123, the transmission rod 20 is provided with a transmission hole 124, and the distance of the transmission hole 124 in the extension direction of the transmission rod 20 is less than the distance perpendicular to the direction of the transmission rod 20; wherein,

[0065] The transmission member 122 is provided with a supporting structure 125 for supporting two side walls of the transmission hole 124 perpendicular to the transmission rod 20 in sequence when the transmission member 122 rotates under the drive of the motor 121, so as to drive the transmission rod 20 to swing around the positioning protrusion 32 as a fulcrum.

[0066] The power assembly 12 includes a motor 121, a transmission member 122 and a limit bearing 123. The limit bearing 123 is used to limit the position of the transmission member 122, and drives the transmission member 122 to rotate at high speed under the action of the motor 121. When the transmission member 122 rotates at high speed, the supporting structure 125 provided on the outer wall of the transmission member 122 squeezes the two side walls of the transmission hole 124 in turn, thereby driving the transmission rod 20 to rotate at high speed with the button 30 as a fulcrum, thereby cleaning the teeth. The electric toothbrush 1 disclosed in the present invention, when in use, only the bristle assembly 18 swings, and the mounting head 16 does not swing, and the use comfort is high; at the same time, because the transmission rod 20 is used to transmit power, the thickness of the mounting head 16 is reduced, and the teeth can be cleaned deeply; when replacing the bristle assembly 18, there is no need to completely replace the electric brush head 10, which reduces the use cost of the electric toothbrush 1.

[0067] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric toothbrush, characterized in that: It includes a brush handle, a power assembly, an adjusting member and an electric brush head, and the electric brush head includes: a mounting head, a brush rod, a bristle assembly, a connecting assembly and a transmission rod, the mounting head is connected to the brush rod, the mounting head is provided with a mounting cavity, the brush rod is provided with a power hole, and the power hole is communicated with the mounting cavity; the bristle assembly includes bristles, a brush plate and an external member, the bristles and the external member are both connected to the brush plate, the brush plate is arranged in the mounting cavity and connected to the mounting head through the connecting assembly; the transmission rod is arranged in the power hole and is connected to the external member at one end away from the brush rod; the width of the power hole is greater than the width of the transmission rod, and a flexible connecting layer is provided between the transmission rod and the inner wall of the power hole; the adjusting member is arranged on the brush rod; wherein, The electric brush head is detachably connected to the brush handle; The power assembly is connected to the transmission rod and is used to drive the transmission rod to swing in the power hole with the adjustment member as a fulcrum; The bristle assembly is detachably connected to the mounting head via the connecting assembly; The connecting assembly comprises: a concave structure provided on the brush plate, and a convex structure provided on the inner wall of the mounting head and matching with the concave structure; The concave structure is a groove arranged transversely, and the convex structure is a convex strip matching the groove; The external connection member is a protrusion arranged at the bottom of the brush plate, the transmission rod is provided with an external connection hole matching the protrusion, and the protrusion is connected to the transmission rod through the external connection hole; the adjustment member includes a plurality of sets of buttons; the brush rod is provided with a button hole, and the button is connected to the brush rod through the button hole; wherein, The button is provided with a positioning protrusion, and the transmission rod is provided with a positioning hole matching the positioning protrusion; the button is arranged through the brush rod, and when the positioning protrusion is pressed into the corresponding positioning hole, the positioning protrusion position corresponding to the button is used as the fulcrum for the swing of the transmission rod, thereby adjusting the swing arc of the transmission rod close to one end of the bristle assembly, thereby controlling the swing force and amplitude of the bristle assembly.

2. The electric toothbrush according to claim 1, characterized in that: The flexible connection layer is a silicone layer, and the silicone layer is sleeved on the outer circumference of the transmission rod.

3. The electric toothbrush according to claim 1, characterized in that: The electric brush head also includes a waterproof layer, which is arranged between the bristle assembly and the mounting head.

4. The electric toothbrush according to claim 1, characterized in that: The power assembly includes a motor, a transmission member and a limit bearing, the transmission member is connected to the inner wall of the brush handle through the limit bearing, the transmission rod is provided with a transmission hole, and the distance of the transmission hole in the extension direction of the transmission rod is smaller than the distance perpendicular to the direction of the transmission rod; wherein, The transmission member is provided with a supporting structure, which is used to sequentially support the two side walls of the transmission hole in a direction perpendicular to the transmission rod when the transmission member is driven by the motor to rotate, so as to drive the transmission rod to swing with the positioning protrusion as a fulcrum.

Images