CN217660261U - Electric toothbrush - Google Patents

Abstract

The utility model provides an electric toothbrush, it includes toothbrush handle, toothbrush head, driving piece, brush head connecting piece, switch module and overvoltage protection subassembly. The first end of the brush head connecting piece extends into the toothbrush head, the second end of the brush head connecting piece is pivotally arranged in the inner cavity of the toothbrush handle, and the brush head connecting piece is in an overpressure state of rotating and tilting when the external force borne by the toothbrush head exceeds a preset threshold value. The switch assembly comprises a switch elastic sheet, the power supply circuit is switched on to enable the driving piece to be opened when the free end of the switch elastic sheet is stressed and attached to the driving piece, and the power supply circuit is switched off to enable the driving piece to be closed when the free end of the switch elastic sheet is stressed and detached from the driving piece. The overvoltage protection component is used for separating the free end of the switch elastic sheet from the driving piece or disconnecting the power supply circuit of the driving piece under the action of the brush head connecting piece when the brush head connecting piece is in an overvoltage state. Above-mentioned electric toothbrush can in time stop driving piece work when toothbrush head receives external force and surpasss and predetermine the threshold value to reach the mesh of protection tooth.

Description

Electric toothbrush

Technical Field

The utility model relates to a tooth cleaning device technical field especially relates to an electric toothbrush.

Background

At present, electric toothbrushes are increasingly popularized in the lives of people, and along with the popularization of the market, the traditional toothbrushes cannot meet the needs of people, people hope that the toothbrushes are more and more intelligent, and better services can be provided for the teeth of people. When a user brushes teeth, if the electric toothbrush presses the teeth too hard, the gum and the tooth neck can be damaged, so that the user experience is influenced. At present, most electric toothbrush does not possess the overvoltage protection function on the market, though has the subtotal to possess the overvoltage protection function, but often adopt pressure sensor's mode to detect, lead to the cost too high, thereby perhaps drive the motor skew through the toothbrush head skew, reach the purpose that makes the motor shut down, but the skew of motor can lead to the mounted position of motor in the production process hardly to obtain the guarantee, thereby cause the problem of circuit contact failure to take place. For example, chinese patent publication No. CN1443518A discloses an electric toothbrush including a handle, a neck having a longitudinal axis, and a head mounted on the neck, the bristles of the electric toothbrush rotating about an axis at an acute angle to the longitudinal axis of the neck. The electric toothbrush does not have an overvoltage protection function, cannot better protect teeth, and is poor in user experience.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the utility model provides an electric toothbrush, it possesses the overvoltage protection function, can in time stop driving piece work when the toothbrush head receives external force and surpasss and predetermine the threshold value to reach the mesh of protection tooth.

An embodiment of the utility model provides an electric toothbrush, include toothbrush handle, toothbrush head and locate driving piece in the toothbrush handle, electric toothbrush still includes brush head connecting piece, switch module and overvoltage protection subassembly. The first end of the brush head connecting piece extends into the inner cavity of the toothbrush head, the second end, opposite to the first end, of the brush head connecting piece is pivotally arranged in the inner cavity of the toothbrush handle, and the brush head connecting piece is provided with an overpressure state which can rotate and tilt when the external force applied to the toothbrush head exceeds a preset threshold value. The switch assembly is arranged on the toothbrush handle and comprises a switch elastic sheet which is connected in series with a power supply circuit for supplying power to the driving piece, the power supply circuit is switched on to enable the driving piece to be opened when the free end of the switch elastic sheet is stressed and attached to the driving piece, and the power supply circuit is switched off to enable the driving piece to be closed when the free end of the switch elastic sheet is stressed and separated from the driving piece. The overvoltage protection component is arranged on the brush head connecting piece and used for separating the free end of the switch elastic sheet from the driving piece or disconnecting the power supply circuit of the driving piece under the action of the brush head connecting piece when the brush head connecting piece is in an overvoltage state. Above-mentioned electric toothbrush can in time stop driving piece work when toothbrush head receives external force and surpasss and predetermine the threshold value to reach the mesh of protection tooth.

In some embodiments, the overvoltage protection assembly includes a first overvoltage protection element, the first overvoltage protection element includes a fin, one end of the fin abuts against the second end of the brushhead connector, and the other end abuts against the free end of the switch spring, so that when the brushhead connector is in an overvoltage state, the second end of the brushhead connector acts on one end of the fin, and the other end of the fin drives the free end of the switch spring to disengage from the driving element. The structure is stable and reliable, the fin has a simple structure, and the cost is lower.

In some embodiments, the overvoltage protection assembly includes a second overvoltage protection element including a reset switch and an electrical connection line connected thereto, the reset switch being connected in series with a power supply circuit for powering the drive element via the electrical connection line, such that when the brushhead connector is in an overvoltage condition, the reset switch of the second overvoltage protection element is triggered to turn from a closed state to an open state to open the power supply circuit. Therefore, the purpose of disconnecting the power supply power can be achieved by triggering the reset switch under the overvoltage state through additionally arranging the reset switch, so that overvoltage protection is realized.

In some embodiments, the reset switch includes a switch body and a button disposed thereon, the switch body is disposed on the brush head connecting member, a pressing surface of the button is disposed toward the driving member, so that when the brush head connecting member is in an overpressure state, the button moves toward the driving member, and the button triggers the reset switch under a reaction force of the driving member. The reset switch is simple in structure, and the mode of triggering the reset switch does not need extra operation, so that overvoltage protection is realized.

In some embodiments, the electric toothbrush further comprises a first sealing ring sleeved outside the second end of the brush head connecting member, and the periphery of the first sealing ring abuts against the inner wall of the toothbrush handle. Can enough make brush head connecting piece and toothbrush handle sealing connection through this first sealing washer, can also be at the first connecting piece excessive pressure perk back automatic re-setting of brushing, need not the first connecting piece of brush that the user resets manually, stable in structure.

In some embodiments, the electric toothbrush further comprises a second sealing ring sleeved outside the output shaft of the driving member, a groove is formed at the second end of the brush head connecting member, and the outer periphery of the second sealing ring abuts against the inner wall of the groove. Therefore, when the brush head connecting piece is in an overpressure state, the second sealing ring can be extruded and deformed as a stress point, the driving piece is protected from being influenced by the brush head connecting piece, and the purpose of protecting the driving piece is achieved.

In some embodiments, the electric toothbrush further comprises a positioning ring and a motor frame, the positioning ring is used for installing the first sealing ring, the motor frame is used for installing the driving piece, an accommodating cavity is formed between the positioning ring and the motor frame, and the second end of the brush head connecting piece is at least partially located in the accommodating cavity. The structure is simple, and the brush head connecting piece can be stably limited in the toothbrush handle.

In some embodiments, the second end of the brushhead connector has a pivot shaft, and the positioning ring and the motor mount cooperate to form a pivot hole through which the pivot shaft passes. The structure is simple and the design is reasonable.

In some embodiments, the toothbrush handle is provided with a mounting hole for penetrating through the brush head connecting piece, and a movable interval is formed between the hole wall of the mounting hole and the outer wall of the brush head connecting piece to provide a space for tilting the brush head connecting piece, so that the situation that the brush head connecting piece cannot tilt due to interference of the mounting hole when the toothbrush head is subjected to an excessive external force is avoided.

In some embodiments, the electric toothbrush further comprises a charging assembly, and the charging assembly, the switch assembly and the driving member are connected in series in sequence to form the power supply circuit. Need not to set up the mainboard in the above-mentioned electric toothbrush, adopt so simple supply circuit can realize driving the purpose of toothbrush head work through the driving piece, manufacturing cost is lower.

Compared with the prior art, the utility model discloses beneficial effect lies in: the utility model discloses a first connecting piece of brush stretches into in the toothbrush head for toothbrush head excessive pressure the time can drive first connecting piece of brush simultaneously and rotate and one end perk, thereby make the free end of switch shell fragment break away from under the effect of first connecting piece of brush the driving piece, or make the power supply circuit disconnection of driving piece, thereby realize when first connecting piece of brush is in overvoltage status, the driving piece can be closed in order to protect the tooth, has avoided electric toothbrush to the damage of the gum neck of the overweight institute of pressing down of tooth to cause, has improved user's use effectively and has experienced.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar parts throughout the different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

FIG. 1 is a schematic view of an electric toothbrush according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of an electric toothbrush according to an embodiment of the present invention;

fig. 3 is an exploded view of an electric toothbrush in accordance with an embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of an electric toothbrush in accordance with an embodiment of the present invention, the electric toothbrush being shown in an inoperative condition;

FIG. 5 is a partial cross-sectional view of an electric toothbrush in accordance with an embodiment of the present invention, the electric toothbrush shown in normal operation;

FIG. 6 is a partial cross-sectional view of an electric toothbrush in accordance with an embodiment of the present invention, showing a brushhead attachment member of the electric toothbrush in an over-pressure condition;

FIG. 7 is an exploded view of a second powered toothbrush in accordance with an embodiment of the present invention;

FIG. 8 is a partial cross-sectional view of a second electric toothbrush according to an embodiment of the present invention, the electric toothbrush shown in the figures being in a normal operating condition;

fig. 9 is a partial cross-sectional view of a second electric toothbrush in accordance with an embodiment of the present invention, showing a brushhead attachment member of the electric toothbrush in an over-pressure condition.

The members denoted by reference numerals in the drawings:

1-toothbrush handle; 101-mounting holes; 102-active interval; 2-toothbrush head; 3-a driving member; 301-a motor mount; 302-pivot holes; 4-a brushhead attachment member; 401-grooves; 402-a pivot shaft; 5-a switch assembly; 501-switch elastic sheet; 6-overvoltage protection components; 601-wane; 602-a reset switch; 603-electrical connection lines; 604-push button; 7-a first sealing ring; 701-a positioning ring; 8-a second sealing ring; 9-a charging assembly; 10-tail cap; 11-Brush head drive rod.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

The embodiment of the utility model provides an electric toothbrush, as shown in fig. 1 to 3, electric toothbrush includes toothbrush handle 1, toothbrush head 2 and locates driving piece 3 in toothbrush handle 1, and electric toothbrush still includes brush head connecting piece 4, switch module 5 and overvoltage protection subassembly 6. The first end of the brush head connecting piece 4 extends into the inner cavity of the toothbrush head 2, the second end, opposite to the first end, of the brush head connecting piece 4 is pivotally arranged in the inner cavity of the toothbrush handle 1, and the brush head connecting piece 4 is in an overpressure state of rotating and tilting when the external force borne by the toothbrush head 2 exceeds a preset threshold value. On switch module 5 located toothbrush handle 1, switch module 5 included the switch shell fragment 501 that concatenates in the power supply circuit for driving piece 3 power supply, and power supply circuit switched on when switch shell fragment 501's free end atress closed driving piece 3 and made driving piece 3 open, and power supply circuit disconnection made driving piece 3 close when switch shell fragment 501's free end atress broke away from driving piece 3. The overvoltage protection component 6 is arranged on the brush head connecting piece 4, and the overvoltage protection component 6 is used for enabling the free end of the switch elastic sheet 501 to be separated from the driving piece 3 or enabling a power supply circuit of the driving piece 3 to be disconnected under the action of the brush head connecting piece 4 when the brush head connecting piece 4 is in an overvoltage state.

Specifically, the electric toothbrush further comprises a tail cover 10 and a toothbrush head driving rod 11, the tail cover 10 is buckled at one end of the toothbrush handle 1 far away from the toothbrush head 2, and the driving piece 3 is connected with the toothbrush head 2 through the toothbrush head driving rod 11, so that the toothbrush head 2 is driven to move. Above-mentioned brush head actuating lever 11 is under the overpressure condition, and the one end of connecting toothbrush head 2 takes place the bending along with toothbrush head 2, and the one end of connecting driving piece 3 does not take place the bending, that is to say, under the overpressure condition, and driving piece 3 can not take place the change in position, the shape along with toothbrush head 2 to reach the purpose of protection driving piece 3, prolong driving piece 3's life, and do benefit to driving piece 3 and keep on a certain position in toothbrush handle 1.

Specifically, the preset threshold value can be set according to experience, under the condition that the external force applied to the toothbrush head 2 is lower than the preset threshold value, the teeth can be protected, the teeth cannot be damaged due to overlarge external force, once the external force exceeds the preset threshold value, it is indicated that the teeth can be damaged by the large external force, the purpose of protecting the teeth cannot be achieved, the electric toothbrush can be stopped to work in time by controlling the driving piece 3 to stop working, and the user is prompted to reduce the tooth brushing force. The external force may be a pressing force applied to the electric toothbrush when a user brushes the teeth with the electric toothbrush.

Specifically, the housing of the driving member 3 may be made of a metal material, and when the free end of the switch elastic sheet 501 is pressed and attached to the driving member 3, the switch elastic sheet 501 may be connected to the metal housing of the driving member 3, so that the power supply circuit connected in series to the switch elastic sheet 501 may be turned on, and the power supply circuit supplies power to the driving member 3. The end of the switch spring 501 opposite to the free end can be connected to the power supply circuit.

Specifically, the overvoltage protection component 6 is disposed on the brush head connecting member 4, when the brush head connecting member 4 is rotated to tilt, the brush head connecting member 4 will act on the overvoltage protection component 6, so as to achieve the purpose of overvoltage protection, and there are two specific implementation manners for overvoltage protection, which will be described in detail below and will not be described again.

The utility model discloses a brush head connecting piece 4 stretches into in toothbrush head 2, make toothbrush head 2 can drive brush head connecting piece 4 simultaneously and rotate and one end perk when excessive pressure, thereby make the free end of switch shell fragment 501 break away from driving piece 3 under the effect of brush head connecting piece 4, or make the power supply circuit disconnection of driving piece 3, thereby realize when brush head connecting piece 4 is in the overvoltage status, driving piece 3 can be closed in order to protect the tooth, the damage of the gum neck that the overweight caused of pressing down of electric toothbrush to the tooth has been avoided, user experience of using has been improved effectively.

The present application proposes two embodiments for the overvoltage protection component 6, which can be selectively adopted, and also can combine the technical features of the two embodiments without conflict to form other technical solutions capable of realizing overvoltage protection.

The first embodiment is as follows: with specific reference to fig. 4 to 6, in the first embodiment, the interaction between the switch dome 501 and the overvoltage protection component 6 is proposed to implement overvoltage protection. The electric toothbrush shown in fig. 4 is in a non-operating state, in which the free end of the switch spring 501 is not attached to the driving member 3 and is in contact with the overvoltage protection component 6, the power supply circuit is in an off state, and the driving member 3 is closed; the electric toothbrush shown in fig. 5 is in a normal operating state, at this time, the free end of the switch spring 501 is attached to the housing of the driving member 3 and the overvoltage protection component 6, the power supply circuit is in a conducting state, and the driving member 3 is opened; fig. 6 shows the toothbrush head 2 of the electric toothbrush being in an over-pressure state, the head connector 4 being in an over-pressure state, and the over-pressure protection assembly 6 will disengage the free end of the switch spring 501 from the driving member 3 under the action of the tilted end of the head connector 4, so that the driving member 3 is closed.

Specifically, as shown in fig. 4 to 6, the overvoltage protection assembly 6 includes a first overvoltage protection member, the first overvoltage protection member includes a fin 601, one end of the fin 601 abuts against the second end of the brush head connector 4, and the other end abuts against the free end of the switch elastic sheet 501, so that when the brush head connector 4 is in an overvoltage state, the second end of the brush head connector 4 acts on one end of the fin 601, and the other end of the fin 601 drives the free end of the switch elastic sheet 501 to separate from the driving member 3. The structure is stable and reliable, the fin 601 is simple in structure, and the cost is low.

Specifically, the above-mentioned fin 601 can adopt a metal sheet, which has a conductive function, and when the electric toothbrush works normally, the switch elastic sheet 501 can be electrically conducted with the driving member 3 through the fin 601, thereby achieving the purpose of conducting the power supply circuit.

Example two: with particular reference to fig. 7 to 9, this second embodiment proposes that the overvoltage protection is implemented by directly turning off the reset switch 602 in the power supply circuit under the action of the brushhead connector 4, instead of acting on the switch dome 501. The electric toothbrush shown in fig. 8 is in a normal working state, at this time, the free end of the switch spring plate 501 is attached to the housing of the driving member 3, the power supply circuit is in a conducting state, and the driving member 3 is turned on; in figure 9, the head 2 of the power toothbrush is shown in an over-voltage condition, the brushhead attachment 4 is in an over-voltage condition, and the reset switch 602 of the over-voltage protection assembly 6 is activated by the brushhead attachment 4 to open the power supply circuit to power the drive member 3, thereby causing the drive member 3 to close.

Specifically, as shown in fig. 7 to 9, the overvoltage protection assembly 6 comprises a second overvoltage protection element, which comprises a reset switch 602 and an electrical connection line 603 connected thereto, the reset switch 602 being connected in series via the electrical connection line 603 in the power supply circuit for powering the drive element 3, so that when the brushhead connector 4 is in an overvoltage state, the reset switch 602 of the second overvoltage protection element is triggered from the closed state to the open state, so as to open the power supply circuit. Thus, the purpose of disconnecting the power supply power can be achieved by additionally arranging the reset switch 602 and triggering the reset switch 602 in an overvoltage state, so that overvoltage protection is realized.

In alternative embodiments, the reset switch 602 may be located on the side of the brushhead attachment member 4 that will approach the drive member 3 under overpressure conditions, such that the brushhead attachment member 4 is pressed against the drive member 3 and thereby activated. In some other embodiments, the reset switch 602 may be disposed on a side of the brush head connector 4 that is tilted and raised under an overpressure condition, the reset switch 602 is disposed between the brush head connector 4 and an inner wall of the toothbrush handle 1, and the tilted side of the brush head connector 4 presses the reset switch 602 between the brush head connector 4 and the inner wall of the toothbrush handle 1 when the brush head connector 4 is in the overpressure condition, so that the reset switch 602 is triggered to disconnect the power supply circuit.

Specifically, the reset switch 602 is normally closed to avoid affecting the normal use of the electric toothbrush.

Specifically, as shown in fig. 8, the reset switch 602 includes a switch body and a button 604 disposed thereon, the switch body is disposed on the brush head connector 4, a pressing surface of the button 604 is disposed toward the driving member 3, so that when the brush head connector 4 is in an overpressure state, the button 604 moves toward the driving member 3, and the button 604 triggers the reset switch 602 under a reaction force of the driving member 3. The reset switch 602 is simple in structure, and the mode of triggering the reset switch 602 does not need additional operation, thereby being beneficial to realizing overvoltage protection.

In some embodiments, as shown in fig. 3 to 9, the electric toothbrush further comprises a first sealing ring 7 sleeved outside the second end of the brushhead connecting member 4, and the outer circumference of the first sealing ring 7 abuts against the inner wall of the toothbrush handle 1. Can enough make brush head connecting piece 4 and toothbrush handle 1 sealing connection through this first sealing washer 7, can also be at brush head connecting piece 4 excessive pressure perk back automatic re-setting, need not user's manual first connecting piece 4 of resetting, stable in structure.

In particular, the first sealing ring 7 is made of a material having good elasticity, and may have a certain thickness to apply a restoring elastic force to the brush head connecting member 4.

In some embodiments, as shown in fig. 3 to 9, the electric toothbrush further includes a second sealing ring 8 sleeved outside the output shaft of the driving member 3, a groove 401 is formed at the second end of the brush head connecting member 4, and the outer periphery of the second sealing ring 8 abuts against the inner wall of the groove 401. Therefore, when the brush head connecting piece 4 is in an overpressure state, the second sealing ring 8 can be extruded and deformed as a stress point, the driving piece 3 is protected from being influenced by the brush head connecting piece 4, the purpose of protecting the driving piece 3 is achieved, and the service life of the driving piece 3 is prolonged. And the second sealing ring 8 and the first sealing ring 7 can be matched to ensure that the brush head connecting piece 4 is reset after overpressure, so that the structural stability is stronger.

In particular, the second sealing ring 8 is made of a material with good elasticity and can have a certain thickness to better protect the driving member 3.

In some embodiments, as shown in fig. 3 and 7, the electric toothbrush further comprises a positioning ring 701 and a motor holder 301, the positioning ring 701 is used for installing the first sealing ring 7, the motor holder 301 is used for installing the driving member 3, a receiving cavity is formed between the positioning ring 701 and the motor holder 301, and the second end of the brush head connecting member 4 is at least partially located in the receiving cavity. The above structure is simple and the brushhead attachment 4 can be stably confined in the toothbrush handle 1.

In some embodiments, as shown in fig. 2 and 3, the second end of the brush head connector 4 has a pivot shaft 402, and the positioning ring 701 and the motor mount 301 cooperate to form a pivot hole 302 through the pivot shaft 402. The structure is simple and the design is reasonable.

Specifically, the positioning ring 701 forms a part of the pivot hole 302, the motor frame 301 forms another part of the pivot hole 302, and after the brush head connecting member 4 is placed between the positioning ring 701 and the motor frame 301, the positioning ring 701 and the motor frame 301 are fixed, so that the pivot shaft 402 can be limited in the pivot hole 302, thereby not only satisfying the rotation of the brush head connecting member 4, but also limiting the brush head connecting member 4.

In some embodiments, as shown in fig. 4, the toothbrush handle 1 has a mounting hole 101 for passing through the brush head connecting member 4, and a movable space 102 is formed between the hole wall of the mounting hole 101 and the outer wall of the brush head connecting member 4 to provide a space for tilting the brush head connecting member 4, so as to prevent the brush head connecting member 4 from tilting due to interference of the mounting hole 101 when the toothbrush head 2 is subjected to an excessive external force.

In some embodiments, as shown in fig. 3 and 7, the electric toothbrush further comprises a charging assembly 9, and the charging assembly 9, the switch assembly 5 and the driving member 3 are connected in series to form a power supply circuit.

Need not to set up the mainboard in the above-mentioned electric toothbrush, adopt so simple supply circuit can realize driving the purpose of 2 work of toothbrush head through driving piece 3, manufacturing cost is lower.

In the case where the overvoltage protection component 6 has the structure of the second embodiment, the reset switch 602 is also connected in series in the power supply circuit.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention. Various modifications and equivalents of the invention which may occur to those skilled in the art and which fall within the spirit and scope of the invention should be considered as falling within the scope of the invention.

Claims (10)

1. The utility model provides an electric toothbrush, includes toothbrush handle (1), toothbrush head (2) and locates driving piece (3) in toothbrush handle (1), its characterized in that still includes:

the toothbrush handle comprises a toothbrush head connecting piece (4), a first end of the toothbrush head connecting piece (4) extends into an inner cavity of the toothbrush head (2), a second end, opposite to the first end, of the toothbrush head connecting piece (4) is pivotally arranged in the inner cavity of the toothbrush handle (1), and the toothbrush head connecting piece (4) is in an overpressure state of rotating and tilting when the toothbrush head (2) is subjected to external force exceeding a preset threshold value;

the toothbrush handle comprises a toothbrush handle (1), a switch assembly (5) and a control circuit, wherein the toothbrush handle (1) is provided with a toothbrush handle cover, the switch assembly (5) comprises a switch elastic sheet (501) which is connected in series with a power supply circuit for supplying power to the driving part (3), the power supply circuit is conducted to open the driving part (3) when the free end of the switch elastic sheet (501) is stressed and attached to the driving part (3), and the power supply circuit is disconnected to close the driving part (3) when the free end of the switch elastic sheet (501) is stressed and separated from the driving part (3);

the overvoltage protection component (6) is arranged on the brush head connecting piece (4), and the overvoltage protection component (6) is used for enabling the free end of the switch elastic sheet (501) to be separated from the driving piece (3) or disconnecting the power supply circuit of the driving piece (3) under the action of the brush head connecting piece (4) when the brush head connecting piece (4) is in an overvoltage state.

2. The electric toothbrush according to claim 1, characterized in that the overvoltage protection assembly (6) comprises a first overvoltage protection element, the first overvoltage protection element comprises a fin (601), one end of the fin (601) abuts against the second end of the brushhead connector (4), and the other end abuts against the free end of the switch spring (501), so that when the brushhead connector (4) is in an overvoltage state, the second end of the brushhead connector (4) acts on one end of the fin (601), so that the other end of the fin (601) drives the free end of the switch spring (501) to disengage from the driving element (3).

3. The electric toothbrush according to claim 1, characterized in that the overvoltage protection assembly (6) comprises a second overvoltage protection element which comprises a reset switch (602) and an electrical connection line (603) connected thereto, the reset switch (602) being connected in series via the electrical connection line (603) in a supply circuit for supplying the drive element (3) such that, when the brushhead connector (4) is in an overvoltage state, the reset switch (602) of the second overvoltage protection element is triggered from a closed state to an open state for opening the supply circuit.

4. The electric toothbrush according to claim 3, characterized in that the reset switch (602) comprises a switch body and a button (604) arranged thereon, the switch body is arranged on the brushhead connector (4), a pressing surface of the button (604) is arranged towards the drive member (3) so that the button (604) moves towards the drive member (3) when the brushhead connector (4) is in an overpressure state, the button (604) triggers the reset switch (602) under the reaction force of the drive member (3).

5. The electric toothbrush according to claim 1, further comprising a first sealing ring (7) sleeved outside the second end of the brush head connecting member (4), wherein the outer circumference of the first sealing ring (7) abuts against the inner wall of the toothbrush handle (1).

6. The electric toothbrush according to claim 1, further comprising a second sealing ring (8) sleeved outside the output shaft of the driving member (3), wherein a groove (401) is formed at a second end of the brush head connecting member (4), and an outer circumference of the second sealing ring (8) abuts against an inner wall of the groove (401).

7. The electric toothbrush according to claim 5, characterized in that the electric toothbrush further comprises a positioning ring (701) and a motor holder (301), the positioning ring (701) being adapted to receive the first sealing ring (7), the motor holder (301) being adapted to receive the driving member (3), a receiving cavity being formed between the positioning ring (701) and the motor holder (301), the second end of the brush head connection member (4) being at least partially located in the receiving cavity.

8. The electric toothbrush according to claim 7, wherein the second end of the brushhead connector (4) has a pivot shaft (402), the positioning ring (701) and the motor mount (301) cooperating to form a pivot hole (302) for the pivot shaft (402) to pass through.

9. The electric toothbrush according to claim 1, wherein the toothbrush handle (1) has a mounting hole (101) for passing through the brush head connecting member (4), and a movable space (102) is formed between the hole wall of the mounting hole (101) and the outer wall of the brush head connecting member (4) to provide a space for the tilting of the brush head connecting member (4).

10. The electric toothbrush according to claim 1, further comprising a charging assembly (9), wherein the charging assembly (9), the switch assembly (5) and the driving member (3) are connected in series in sequence to form the power supply circuit.

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