CN210962396U

CN210962396U - Electric toothbrush

Info

Publication number: CN210962396U
Application number: CN201921558497.3U
Authority: CN
Inventors: 李欣华
Original assignee: Guangzhou Huixin Electronic Technology Co ltd
Current assignee: Guangzhou Huixin Electronic Technology Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-07-10
Anticipated expiration: 2029-09-19

Abstract

The utility model discloses an electric toothbrush, which comprises a toothbrush handle and a toothbrush head which are connected, wherein an induction end is arranged on the toothbrush head near the bristles; the toothbrush handle is provided with a controller, an operating switch, an inductive switch circuit and a driving device of the toothbrush head; the driving device and the operation switch are both electrically connected with the controller, and the induction end is electrically connected with the controller through the induction switch circuit. The utility model provides an electric toothbrush can let the toothbrush head just begin work after getting into the oral cavity, avoids the overhead toothpaste foam of toothbrush to splash everywhere, is favorable to keeping the clean health of the environment of washing one's face and rinsing one's mouth.

Description

Electric toothbrush

Technical Field

The utility model relates to a toothbrush field especially relates to an electric toothbrush.

Background

Teeth are important parts of human bodies, and because the teeth have the characteristic that the teeth cannot be repaired by themselves after being worn, people pay more and more attention to the health of the teeth. The electric toothbrush has superior tooth cleaning performance to the conventional passive toothbrush, and thus consumers who use the electric toothbrush have been increasing in recent years. However, the existing toothbrushes are provided with a timing switch, and if the set time is not reached after the toothbrush is started, the toothbrush cannot be automatically turned off unless the switch is manually operated. In the process of brushing teeth, people may break the teeth midway and need to take out the toothbrush head from the mouth, and at the moment, if the electric toothbrush is not stopped by the manual switch in time, the toothbrush head vibrating ceaselessly can throw toothpaste foam out to enable the toothpaste foam to splash everywhere. This can soil the surrounding environment, and because the toothpaste foam particles are small, they are not easy to be found in time, and the cleaning difficulty is large. In addition, after people extrude the toothpaste to the toothbrush head and before the toothbrush head is put into an oral cavity, if the switch of the electric toothbrush is operated by mistake and the toothbrush head starts to vibrate, the toothpaste on the toothbrush head can easily fall off due to vibration, the toothpaste is wasted, and the cleaning is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electric toothbrush can let the toothbrush head just begin work after getting into the oral cavity, avoids the overhead toothpaste foam of toothbrush to splash everywhere, is favorable to keeping the clean health of environment of washing one's face and rinsing one's mouth.

In order to achieve the purpose, the utility model provides an electric toothbrush, which comprises a toothbrush handle and a toothbrush head which are connected, wherein the toothbrush head is provided with an induction end near the brush hair; the toothbrush handle is provided with a controller, an operating switch, an inductive switch circuit and a driving device of the toothbrush head; the driving device and the operation switch are both electrically connected with the controller, and the induction end is electrically connected with the controller through the induction switch circuit.

As a further improvement, the induction end is made of metal, and the induction switch circuit is a capacitive induction switch circuit.

As a further improvement of the utility model, the toothbrush handle is detachably connected with the toothbrush head; an elastic part is arranged in an inner cavity of the toothbrush head, one end of the elastic part is a sensing end, and the other end of the elastic part is in conductive contact with the driving device.

As a further improvement of the utility model, the driving device is a sound wave device, and a sound wave vibration shaft of the sound wave device extends out of the toothbrush handle; one end of the elastic piece is in conductive contact with a sound wave vibration shaft of the sound wave device; the sound wave vibration shaft of the sound wave device is made of a conductive material; the sound wave vibration shaft of the sound wave device is electrically connected with the controller.

As a further improvement of the utility model, an inner cavity opening of the toothbrush head is arranged at one end of the toothbrush head facing the toothbrush handle, and the inner cavity opening of the toothbrush head is connected with an end cover; the end cover is provided with a through hole, and the top end of the sound wave vibration shaft of the sound wave device penetrates through the through hole and is in conductive contact with one end of the elastic element in the inner cavity of the toothbrush head.

As a further improvement of the present invention, the sound wave device further comprises a stator and a rotor which are matched with each other, and the sound wave vibration shaft penetrates through the rotor and is fixedly connected with the rotor; the stator is connected with a fixed seat; one end of the sound wave vibration shaft is in conductive contact with one end of the elastic piece, the other end of the sound wave vibration shaft is rotationally connected with the fixed seat, and the fixed seat is provided with a conductive piece in conductive contact with the other end of the sound wave vibration shaft; the conductive piece is electrically connected with the controller.

As a further improvement of the utility model, a circuit board is arranged in the toothbrush handle, and the controller and the induction switch circuit are arranged on the circuit board.

As a further improvement of the present invention, the operation switch includes an on-off key and a mode key.

As a further improvement of the utility model, a rechargeable battery is arranged in the toothbrush handle; the toothbrush handle is also provided with a wireless charging induction part, and the wireless charging induction part and the rechargeable battery are both connected with the controller.

Advantageous effects

Compared with the prior art, the utility model discloses an electric toothbrush's advantage does:

1. because drive arrangement and operating switch all with controller electric connection, the response end passes through inductive switch circuit and controller electric connection, after the user made the controller electrified through operating switch, only when the people stretches into the mouth back to the toothbrush head, the response end is because of environmental change through inductive switch circuit to controller send signal, the controller just controls drive arrangement and starts and drive toothbrush head work. When the toothbrush head is taken out of the mouth, the induction end sends a signal to the controller through the induction switch circuit again, and the controller closes the driving device. The electric toothbrush can ensure that the toothbrush head only works when stretching into the oral cavity, thereby not only avoiding the problem that toothpaste foam splashes around because the toothbrush head is taken out during tooth brushing, but also avoiding the problem that toothpaste falls off from the toothbrush head because the toothbrush head is started by mistake after the toothpaste is squeezed, and being beneficial to keeping the clean and sanitary washing environment. After the controller is started by operating the switch, the induction end starts to work, so that the driving device is prevented from being started due to careless touch of the induction end in the transportation or other non-tooth brushing processes, a double-safety effect is achieved, and the waste of electric energy is avoided.

2. The inductive switch circuit is capacitive inductive switch circuit electric connection, and when the toothbrush head was close to or touched the oral cavity, the inductive terminal just passed through capacitive inductive switch circuit signals, let the controller start drive arrangement, circuit structure is simple, and job stabilization nature is good, is difficult to break down.

3. The toothbrush handle and the toothbrush head are detachably connected, so that the toothbrush head can be conveniently and periodically replaced. The sensing end is in conductive contact with the driving device through the elastic piece, so that the sensing end can be conveniently replaced along with the toothbrush head.

4. The driving device is a sound wave device, and a sound wave vibration shaft of the sound wave device extends out of the toothbrush handle, so that the sound wave device is conveniently contacted or connected with the elastic part, the length of the elastic part is favorably shortened, and the cost is reduced. Even if the sound wave vibration shaft of the sound wave device vibrates continuously, the elastic piece and the sound wave vibration shaft can be ensured to be electrified continuously.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the internal structure of an electric toothbrush;

FIG. 2 is an enlarged schematic view of the internal structure of the head of the powered toothbrush;

FIG. 3 is a schematic diagram of a main control chip of the electric toothbrush;

FIG. 4 is a schematic diagram of a charging power supply circuit and a capacitive inductive switch circuit for a power toothbrush;

fig. 5 is a partial cross-sectional view of an acoustic wave device.

Detailed Description

Embodiments of the present invention will now be described with reference to the accompanying drawings.

Examples

The utility model discloses a specific implementation mode as shown in figures 1 to 5, an electric toothbrush, which comprises a toothbrush handle 1 and a toothbrush head 3 which are connected, wherein a sensing end 4 is arranged on the toothbrush head 3 near the bristles. The toothbrush handle 1 is provided with a controller, an operating switch 7, an inductive switch circuit 11 and a driving device 5 of the toothbrush head 3. The driving device 5 and the operation switch 7 are both electrically connected with the controller, and the sensing terminal 4 is electrically connected with the controller through a sensing switch circuit 11. The controller is also connected with status indicator lamps D1 and D2, and the status indicator lamps D1 and D2 are arranged on the wall body of the toothbrush handle 1. A circuit board 8 is arranged in the toothbrush handle 1, and a controller and an inductive switch circuit 11 are arranged on the circuit board 8.

In this embodiment, the sensing terminal 4 is made of metal. The inductive switch circuit 11 is a capacitive inductive switch circuit, and the inductive terminal 4 is electrically connected to the capacitive inductive switch circuit.

The toothbrush handle 1 and the toothbrush head 3 are detachably connected, and a clamping connection structure is adopted. A drive means 5 is provided within the toothbrush handle 1. An elastic part 6 is arranged in the inner cavity of the toothbrush head 3, one end of the elastic part 6 is a sensing end 4, and the other end of the elastic part 6 is in conductive contact with a driving device 5. The elastic member 6 is made of metal.

In this embodiment, the drive means 5 is a sonic device, the sonic vibration shaft 51 of which extends out of the toothbrush handle 1. The contact end 61 of the elastic member 6 is in contact with the end of the acoustic vibration shaft 51 of the acoustic device. The acoustic vibration shaft 51 of the acoustic device is made of a conductive material.

The end of the toothbrush head 3 facing the toothbrush handle 1 is provided with an inner cavity opening of the toothbrush head 3. An end cover 31 is connected with the inner cavity opening of the toothbrush head 3. The end cap 31 is provided with a through hole 32, and the top end of the sound wave vibration shaft 51 of the sound wave device passes through the through hole 32 and is in conductive contact with one end of the elastic element 6 in the inner cavity of the toothbrush head 3. The contact end 61 of the elastic member 6 faces the through hole 32, and the size of the contact end 61 is larger than that of the through hole 32, thereby preventing the elastic member 6 from falling out of the through hole 32.

The sound wave vibration shaft 51 of the sound wave device is electrically connected with the controller. Specifically, the acoustic wave device further comprises a stator 52 and a rotor 53 which are matched, and the acoustic wave vibration shaft 51 penetrates through the rotor 53 and is fixedly connected with the rotor 53. The stator 52 is connected to a fixed seat 54. One end of the sound wave vibration shaft 51 is in conductive contact with the contact end 61 of the elastic member 6, the other end of the sound wave vibration shaft 51 is rotatably connected with the fixed seat 54, and in addition, the middle part of the sound wave vibration shaft 51 is also rotatably connected with the fixed seat 54. The part of the rotational connection between the sound wave vibration shaft 51 and the fixed seat 54 is sleeved with a bearing, and the bearing is positioned outside the end part of the rotor 53. The fixed seat 54 is provided with a conductive member 55 in conductive contact with the end surface of the other end of the acoustic vibration shaft 51. The conductive member 55 is electrically connected to the controller through a wire 56. In this embodiment, the conductive member 55 is made of metal and has an elastic structure, such as a spring, so that the conductive member 55 and the end surface of the acoustic vibration shaft 51 are always in contact.

The sound wave device is a sound wave motor, and the sound wave vibration shaft 51 is a metal rotating shaft. The elastic member 6 is a coil spring, and even if the acoustic wave vibration shaft 51 of the acoustic wave device is continuously vibrated, the continuous conduction between the contact end 61 of the elastic member and the acoustic wave vibration shaft 51 can be ensured. In this embodiment, the sensing terminal 4 and the elastic member 6 are integrally formed as a spring. Be equipped with on the toothbrush head 3 inner chamber lateral wall and be the bellied spacing portion 31 of annular, thereby the elastic component 6 of spring form is through passing spacing portion 31 and toothbrush head 3 fixed connection.

An electric toothbrush employing a sonic device is a vibrating toothbrush. In addition, the electric toothbrush can also adopt a rotary toothbrush head, and the driving device is a rotating device, in particular a rotating motor. Since the output shaft of the rotating device needs to rotate, the elastic member 6 cannot be directly contacted with the output shaft of the rotating device, and one end of the elastic member 6 is connected or conductively contacted with the housing of the rotating device.

The sensing end 4 is located in the inner cavity of the toothbrush head 3. When the toothbrush head 3 extends into the oral cavity, although the sensing end 4 is not in direct contact with the oral cavity, the capacitance current in the capacitance type sensing switch circuit changes, so that a signal can be transmitted to the controller. In addition, the induction end 4 made of metal materials can also be arranged on the outer wall of the toothbrush head 3, and the induction end 4 is also close to the oral cavity or can generate a starting signal when contacting with the oral cavity.

The circuit board 8 and the operation switch 7 are provided on the toothbrush handle 1. The operation switch 7 includes a switch key S1 and a mode key S2.

A rechargeable battery 2 is arranged in the toothbrush handle 1. The toothbrush handle 1 is also provided with a wireless charging induction part 10, and the wireless charging induction part 10 and the rechargeable battery 2 are both connected with the controller. The wireless charging inductor 10 is an induction coil.

Besides the inductive switch circuit 11, the circuit board 8 is also provided with a main control chip U1 and a charging power supply circuit, and the controller is a main control chip U1. Pins OUT _ A and OUT _ B of the main control chip U1 are respectively connected with the cathode and the anode of the driving device 5, and the driving device 5 is connected with a capacitor C1 in parallel. The main control chip U1 is also connected with status indicator lamps D1 and D2.

The wireless charging sensor 10 is connected to the terminal CON 1. The terminal CON1 is connected to the VCC terminal of the battery charge management IC through a rectifying circuit composed of diodes D3, D4, D5, and D6. The VCC end of the battery charging management IC and the common end of the rectifying circuit are grounded through resistors R11 and R12 which are connected in sequence. The common terminal of the resistors R11 and R12 is connected to the V _ DCin terminal of the main control chip U1.

The BAT terminal of the battery charge management IC is grounded via the battery BT 1. Battery BT1 is the rechargeable battery 2. The battery BT1 is also connected in parallel with capacitors C7, C8 and C3, respectively. The common terminal of the capacitor C3 and the battery BT1 is connected to the VBAT terminal of the main control chip U1.

The CHRG terminal of the battery charging management IC is connected with the Charge terminal of the main control chip U1. One end of the switch key S1 and one end of the Mode key S2 are connected to the K _ Power terminal and the K _ Mode terminal of the main control chip U1, respectively. The other ends of both the on-off key S1 and the mode key S2 are grounded. The PROG terminal of the main control chip U1 is connected to the ground terminals of both the on/off key S1 and the mode key S2 through a resistor R7. A diode D7, a capacitor C4 and a capacitor C2 are respectively connected in parallel between the resistor R7 and the VCC end of the main control chip U1. The GND terminal of the main control chip U1 is grounded.

The capacitive sensing switch circuit includes a touch chip U3. The OUT terminal of the Touch chip U3 is connected to the K _ Touch terminal of the main control chip U1 through a resistor R9. The GND terminal of the touch chip U3 is grounded. The KEY terminal of the touch chip U3 is connected to the sensing terminal 4 through a resistor R10, and the sensing terminal 4 is SW1 in fig. 4. The OP1 terminal of the touch chip U3 is grounded through the capacitor C9. The VCC terminal of the touch chip U3 is connected to the Vout terminal of the power management chip Q1 through a resistor R8. The Vin terminal of the power management chip Q1 is connected to the BAT terminal of the battery charge management IC. The GND terminal of the power management chip Q1 is grounded. The two ends of the resistor R8 are grounded through capacitors C5 and C6 respectively.

In addition, the output power of the sound wave motor of the electric toothbrush can be adjusted according to the tooth brushing strength, so that the problem of gum injury caused by overlarge tooth brushing strength is solved. The specific implementation mode is as follows: and a current detector is arranged on the circuit board 8 and used for detecting the working current of the sound wave motor, and the current detector is connected with the main control chip U1. When the user uses the electric toothbrush to brush teeth with too large force, the load of the sound wave motor is increased, and the rotating speed and the vibration frequency of the metal rotating shaft of the sound wave motor are reduced. According to the working principle of the motor, the working current of the sound wave motor can be increased at the moment, namely the working current of the sound wave motor is positively correlated with the tooth brushing force. The current detector supplies the measured operating current to the main control chip U1. The main control chip U1 converts the real-time detected working current into corresponding pressure parameter information and analyzes the pressure parameter information. When the pressure parameter information is larger than the preset pressure threshold value of the electric toothbrush, the main control chip U1 judges that the tooth brushing force of the user exceeds the proper pressure, and the main control chip U1 sends a signal to the sound wave motor, so that the rotating speed and the amplitude of the sound wave motor are reduced. The electric toothbrush can automatically adjust the tooth brushing force without the operation of a client, and the tooth brushing force is ensured to be always kept in a proper range, so that the function of protecting the gum is achieved.

In addition to the above embodiments, the sensing terminal 4 may also be a photoelectric sensor, and the circuit board 8 is not provided with a capacitive sensing switch circuit, and the photoelectric sensor is connected to the controller. When the toothbrush head 3 is inserted into the oral cavity, the light becomes dark, and the photoelectric sensor sends a signal to the main control chip U1. The main control chip U1 starts the driving device 5 of the electric toothbrush according to the signal of the photoelectric sensor. In addition, the electric toothbrush may also be provided with a non-rechargeable battery or powered by an external power source. The inductive switching circuit may also be a resistive inductive switching circuit.

The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to the above-disclosed embodiments, and various modifications, equivalent combinations, which are made according to the essence of the present invention, should be covered.

Claims

1. An electric toothbrush comprises a toothbrush handle (1) and a toothbrush head (3) which are connected, and is characterized in that an induction end (4) is arranged on the toothbrush head (3) close to bristles; the toothbrush handle (1) is provided with a controller, an operating switch (7), an inductive switch circuit (11) and a driving device (5) of the toothbrush head (3); the driving device (5) and the operation switch (7) are both electrically connected with the controller, and the induction end (4) is electrically connected with the controller through an induction switch circuit (11).

2. The electric toothbrush according to claim 1, wherein the sensing terminal (4) is made of metal, and the sensing switch circuit (11) is a capacitive sensing switch circuit.

3. An electric toothbrush according to claim 1 or 2, characterized in that the handle (1) is detachably connected to the head (3); an elastic part (6) is arranged in an inner cavity of the toothbrush head (3), one end of the elastic part (6) is the sensing end (4), and the other end of the elastic part (6) is in conductive contact with the driving device (5).

4. A power toothbrush according to claim 3, characterised in that the drive means (5) is a sonic device, the sonic vibration shaft (51) of which projects out of the toothbrush handle (1); one end of the elastic piece (6) is in conductive contact with a sound wave vibration shaft (51) of the sound wave device; the sound wave vibration shaft (51) of the sound wave device is made of conductive materials; the sound wave vibration shaft (51) of the sound wave device is electrically connected with the controller.

5. A power toothbrush according to claim 4, characterized in that the toothbrush head (3) is provided with an inner cavity opening of the toothbrush head (3) at one end facing the toothbrush handle (1), and the inner cavity opening of the toothbrush head (3) is connected with an end cover (31); the end cover (31) is provided with a through hole (32), and the top end of a sound wave vibration shaft (51) of the sound wave device penetrates through the through hole (32) and is in conductive contact with one end of an elastic piece (6) in the inner cavity of the toothbrush head (3).

6. An electric toothbrush according to claim 4 or 5, characterized in that the sonic device further comprises a stator (52) and a rotor (53) adapted to each other, the sonic vibration shaft (51) extending through the rotor (53) and being fixedly connected thereto; the stator (52) is connected with a fixed seat (54); one end of the sound wave vibration shaft (51) is in conductive contact with one end of the elastic piece (6), the other end of the sound wave vibration shaft (51) is rotatably connected with the fixed seat (54), and a conductive piece (55) in conductive contact with the other end of the sound wave vibration shaft (51) is arranged on the fixed seat (54); the conductive piece (55) is electrically connected with the controller.

7. An electric toothbrush according to claim 1 or 2 or 4 or 5, characterized in that a circuit board (8) is provided in the toothbrush handle (1), and the controller and the inductive switch circuit (11) are provided on the circuit board (8).

8. An electric toothbrush according to claim 1 or 2 or 4 or 5, characterized in that the operation switch (7) comprises a switch key (S1) and a mode key (S2).

9. An electric toothbrush according to claim 1 or 2 or 4 or 5, characterized in that a rechargeable battery (2) is provided in the toothbrush handle (1); the toothbrush handle (1) is also provided with a wireless charging induction piece (10), and the wireless charging induction piece (10) and the rechargeable battery (2) are both electrically connected with the controller.