Novel electric toothbrush

Abstract

A novel electric toothbrush comprises an electric toothbrush body, a contact piece, a force sensitive resistor, a control circuit, a voltage regulating circuit and a prompt circuit, a mounting hole is formed in the front side end of the brush handle, the force sensitive resistor is mounted in the mounting hole, and the contact piece is mounted at the front side end of the rubber mat; and the control circuit, the voltage regulating circuit and the prompting circuit are arranged in the circuit board bin and are electrically connected with the storage battery and the motor of the electric toothbrush body respectively. According to the novel toothbrush, the on-off working mode of the motor can be conveniently controlled in a touch mode, the rotating speed of the motor can be adjusted, then the purpose of adjusting the rotating speed or the up-and-down moving speed of the brush head is achieved, convenience is brought to a user, the experience of the user is correspondingly improved, and the market competitiveness of the product is improved; when water enters the circuit board bin, a user can be prompted to process (for example, the lower end cover of the circuit board bin is opened to replace and clear water in the circuit board bin, and a sealing rubber ring is replaced subsequently), damage to related electronic components in the circuit board is reduced, and the service life of the electric toothbrush body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of toothbrush equipment, in particular to a novel electric toothbrush. Background Art

[0002] Electric toothbrushes are generally divided into two categories: electric toothbrushes and sonic vibration toothbrushes. Electric toothbrushes rely on motors and related mechanisms to drive the brush head to rotate at high speed or move up and down, and use toothpaste to clean teeth; sonic vibration toothbrushes use the ultrasonic converter in the brush head to make the brush head vibrate at high frequency, and use toothpaste to clean the surface of teeth.

[0003] Although the existing electric toothbrushes have brought convenience to people to a certain extent and improved the effect of cleaning teeth, they are limited by the structure and still have some shortcomings that need to be improved. First, the speed of the brush head rotating or moving up and down cannot be adjusted, that is, the brush head is in a fixed working mode, which will more or less bring inconvenience to the user and cannot improve the user's experience (for example, some people need the brush head to rotate or move up and down faster to increase the speed of cleaning the toothbrush, while some people are not used to the faster brushing speed and need to reduce the brushing speed). Second, it is necessary to manually turn or press the button of the power switch before the corresponding motor can be powered on. The user's finger operation will also affect the user's experience to some extent. Third, although the battery and the circuit board of the corresponding electronic components installed in the circuit board compartment have a certain waterproof function, with the extension of the use time and the aging of the corresponding seals, there is a probability that the water used for brushing teeth will enter the interior. In this way, since the user cannot timely understand the situation and clear the water entering the circuit board compartment, there is a probability that the battery and the corresponding electronic components will be damaged by water. In addition, with the maturity of industrial technology, the competitiveness of the same products produced by different manufacturers is also increasing. In summary, it is particularly necessary to provide an electric toothbrush that is easy to use and has adjustable speed to bring convenience to users. Utility Model Content

[0004] In order to overcome the drawbacks of existing electric toothbrushes as described in the background technology due to structural limitations, the utility model provides an electric toothbrush body based on which the user can conveniently control the internal motor to turn on or off and adjust the speed of the motor by touching and pressing with fingers, thereby achieving the purpose of adjusting the rotation speed or up and down movement speed of the brush head, and can remind the user when water enters the internal circuit board compartment, thereby minimizing damage to related electronic components in the circuit board and correspondingly increasing the service life of the new electric toothbrush.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A new type of electric toothbrush, comprising an electric toothbrush body, a contact piece, and a force-sensitive resistor, characterized in that it also has a control circuit, a voltage regulating circuit and a prompt circuit; a mounting hole is provided on the front side of the handle of the electric toothbrush body, the force-sensitive resistor is installed in the mounting hole, and the force-bearing surface of the force-sensitive resistor and the rear side of the contact piece are installed together; the prompt circuit is equipped with at least two metal sheets, and the two metal sheets and the control circuit, the voltage regulating circuit and the prompt circuit are installed in a circuit board compartment; the power input end of the voltage regulating circuit is electrically connected to the power output end of the control circuit, and the power output end of the voltage regulating circuit is electrically connected to the motor power input end of the electric toothbrush body; the contact piece is electrically connected to the signal input end of the control circuit, and the two signal ends of the force-sensitive resistor are electrically connected to the two signal input ends of the voltage regulating circuit respectively.

[0007] Furthermore, the force-sensitive resistor is smaller than the inner diameter of the mounting hole, the outer diameter of the contact piece is larger than the outer diameter of the mounting hole, and the contact piece is made of metal.

[0008] Furthermore, the control circuit includes an electrically connected field effect tube, an adjustable resistor, a transistor, and a capacitor, the drain of the field effect tube is connected to one end of the adjustable resistor and the base of the transistor, the other end of the adjustable resistor is connected to the collector of the transistor, the source of the field effect tube is connected to the negative electrode of the capacitor, and the emitter of the transistor is connected to the positive electrode of the capacitor.

[0009] Furthermore, the voltage regulation circuit includes an electrically connected capacitor, a three-terminal adjustable voltage regulation module, and a resistor, wherein the power input end of the three-terminal adjustable voltage regulation module is connected to one end of the first capacitor, the output end of the three-terminal adjustable voltage regulation module is connected to one end of the second capacitor, the regulation end of the three-terminal adjustable voltage regulation module is connected to one end of the resistor, and the other end of the resistor is connected to the other ends of the two capacitors.

[0010] Furthermore, the prompt circuit includes an electrically connected resistor, a light-emitting diode, and a transistor, and is connected to two metal sheets, the first metal sheet is connected to one end of the first resistor, the other end of the first resistor is connected to the positive electrode of the light-emitting diode, the second metal sheet is connected to one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, and the collector of the transistor is connected to the negative electrode of the light-emitting diode.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention is based on an electric toothbrush body. The user can touch and press the contact piece and the force-sensitive resistor with his fingers. Under the action of the control circuit and the voltage regulating circuit, the user can not only conveniently control the internal motor on or off, but also adjust the motor speed, thereby achieving the purpose of adjusting the rotation speed or up and down movement speed of the brush head, which brings convenience to the user, improves the user experience accordingly, and improves the market competitiveness of the product; (2) When water enters the circuit board compartment of the electric toothbrush body due to various reasons, the two metal copper sheets of the prompt circuit will detect it, and the light-emitting diode of the prompt circuit will light up to prompt the user to deal with it (such as opening the lower end cover of the circuit board compartment to clear the water in the circuit board compartment, and then replacing the sealing rubber ring of the cover), thereby minimizing the damage to the relevant electronic components in the circuit board and correspondingly improving the service life of the electric toothbrush body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure and the partially enlarged structure of the utility model.

[0014] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0015] Figure 1 , 2 As shown in the figure, a new type of electric toothbrush includes an electric toothbrush body 1 with a brush head 101 that rotates or moves up and down (the brush head in this embodiment moves up and down), a contact piece M, a force-sensitive resistor RT, and also has a control circuit 2, a voltage regulating circuit 3 and a prompt circuit 4; the brush handle 102 (plastic material) of the electric toothbrush body has a rear concave mounting hole 103 in the middle of the front side end, the rear side end of the force-sensitive resistor RT is glued to the rear end of the mounting hole 103 and its force-bearing surface is located at the front, and the force-bearing surface of the force-sensitive resistor RT is The end of the electric toothbrush body is glued with a rubber pad 5, and the rear end of the contact piece M is glued to the front end of the rubber pad 5; the prompt circuit is equipped with two copper metal sheets T, and the lower ends of the two metal sheets T are glued to the lower side of the circuit board compartment 104 (plastic material) of the electric toothbrush body with a left and right spacing (not in contact with the side end of the circuit board), and the control circuit 2, the voltage regulating circuit 3 and the prompt circuit 4 are installed on the circuit board in the circuit board compartment 104 (the circuit board compartment 104 is slightly larger than the circuit board compartment of the existing electric toothbrush).

[0016] Figure 1 , 2As shown in , the outer diameter of the force-sensitive resistor RT and the rubber pad 5 is smaller than the inner diameter of the mounting hole 103, the outer diameter of the contact piece M is larger than the outer diameter of the mounting hole 103, the thickness of the force-sensitive resistor RT and the rubber pad 5 is greater than the depth of the mounting hole 103, the contact piece M is a copper sheet, and the wire welded to the middle of the rear end of the contact piece M and the wire connected to the force-sensitive resistor RT enter the hollow brush handle 102 through the threading hole on the side of the mounting hole 103 (the threading hole is sealed with sealant). The control circuit includes a field effect transistor Q1, an adjustable resistor RP1, a transistor Q2, and a capacitor C connected via circuit board wiring. The drain of the field effect transistor Q1 is connected to one end of the adjustable resistor RP1 and the base of the transistor Q2, the other end of the adjustable resistor RP1 is connected to the collector of the transistor Q2, the source of the field effect transistor Q1 is connected to the negative electrode of the capacitor C, and the emitter of the transistor Q2 is connected to the positive electrode of the capacitor C. The voltage regulating circuit includes capacitors C1 and C2, a three-terminal adjustable voltage regulating module A1, and a resistor R1 connected via circuit board wiring. The power input terminal 2 of the three-terminal adjustable voltage regulating module A1 is connected to one end of the first capacitor C1, the output terminal 3 of the three-terminal adjustable voltage regulating module A1 is connected to one end of the second capacitor C2, the regulating terminal 1 of the three-terminal adjustable voltage regulating module A1 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the other ends of the two capacitors C1 and C2. The prompt circuit includes resistors R2 and R3, a light-emitting diode VL1, and a transistor Q3 connected via circuit board wiring, and connected to two metal sheets T via wires. The first metal sheet T is connected to one end of the first resistor R3, and the other end of the first resistor R3 is connected to the positive electrode of the light-emitting diode VL1. The second metal sheet T is connected to one end of the second resistor R2, and the other end of the second resistor R2 is connected to the base of the transistor Q3, and the collector of the transistor Q3 is connected to the negative electrode of the light-emitting diode VL1. The other end of the adjustable resistor RP1 at the power input end of the control circuit and the negative electrode of the capacitor C, the other end of the resistor R3 at the power input end of the prompt circuit and the emitter of the transistor Q3 are respectively connected to the two poles of the battery G1 in the electric toothbrush body through the power switch S1 in series and then connected through wires. The two poles of the capacitor C1 at the power input end of the voltage regulating circuit and the positive and negative poles of the capacitor C at the power output end of the control circuit are respectively connected through wires. The two poles of the capacitor C2 at the power output end of the voltage regulating circuit and the two ends of the power input of the motor M1 of the electric toothbrush body are respectively connected through wires. The contact piece M and the gate of the field effect transistor Q1 at the signal input end of the control circuit are connected through wires. The two signal ends of the force sensitive resistor RT and the 1st and 3rd feet of the three-terminal adjustable voltage regulating module A1 at the two signal input ends of the voltage regulating circuit are respectively connected through wires.

[0017] Figure 1 , 2As shown, the new type is based on an electric toothbrush body, and the electric toothbrush body relies on a motor M and related mechanisms to drive the brush head 101 to move up and down, and to clean teeth in combination with toothpaste (the above is an existing mature technology, and this application does not elaborate on the working principle, nor does it provide any technical protection for the electric toothbrush body 1. After the 5V power supply output by the battery G1 in the electric toothbrush body enters the power input end of the control circuit and the prompt circuit, the control circuit and the prompt circuit are powered on and work. After the prompt circuit is powered on and works, if there is no water in the circuit board compartment 104, the resistance between the two metal sheets T (2 mm apart) is infinite, so that the 5V power supply will not enter the base of the transistor Q3, the transistor Q3 will not be turned on, and the light-emitting diode VL1 (the light-emitting surface is located outside the front end opening of the circuit board compartment 104, and the opening and the light-emitting diode The side contact of the transistor is sealed with sealant) and will not emit light, indicating that there is no water in the circuit board compartment 104. When water enters the circuit board compartment 104, the resistance value between the two metal sheets T becomes smaller due to water flooding, so that the 5V power supply will enter the base of the transistor Q3 (higher than 0.7V) through the resistor R2 for voltage reduction and current limiting, and the transistor Q3 is turned on. The collector outputs a low level and enters the negative power input end of the light-emitting diode VL1, and the light-emitting diode VL1 will emit light, indicating that water has entered the circuit board compartment 104 (resistor R3 reduces voltage and limits current); the user can deal with it in time (for example, open the lower end cover of the circuit board compartment to clear the water in the circuit board compartment, and then replace the sealing rubber ring of the cover), which minimizes the probability of damage to related electronic components in the circuit board and correspondingly increases the service life of the electric toothbrush body.

[0018] Figure 1 , 2As shown in the control circuit, when the new type is not in use, when the user's finger (thumb) does not touch the front end of the contact piece M, no induced noise signal enters the gate of the field effect tube Q1, the field effect tube Q1 is in a zero bias state, the resistance between its drain and source is small, and the voltage division of the adjustable resistor RP1 is relatively small (less than the 0.7V starting voltage of the transistor Q2), the base voltage entering the transistor Q2 is lower than 0.7V, the transistor Q2 will not be turned on, then, the subsequent voltage regulation circuit and the motor M1 of the electric toothbrush body will not be powered on and work. When the present invention is used, when the user's finger (thumb) touches the front end of the contact piece M, the inductive noise signal of the human body will enter the gate of the field effect tube Q1, the field effect tube Q1 is no longer in a zero bias state, the resistance between its drain and source is large, and the voltage division of the adjustable resistor RP1 is relatively large (greater than the 0.7V starting voltage of the transistor Q2), the base voltage entering the transistor Q2 is higher than 0.7V, the transistor Q2 will turn on the emitter to output a high level, which will enter the power input end of the voltage regulating circuit through filtering by the capacitor C, and the voltage regulating circuit will be powered on and work. After the voltage regulating circuit is powered on, the three-terminal adjustable voltage regulating module A1, under the joint action of its internal circuit and peripheral components (capacitors C1 and C2 act as filters, resistor R1 is the regulating end resistor of the three-terminal adjustable voltage regulating module, and force-sensitive resistor RT is used as a sampling feedback resistor), can change the output voltage of pin 3 of the three-terminal adjustable voltage regulating module A1 by changing the resistance value of resistor R1 or force-sensitive resistor RT. The larger the resistance value of resistor R1, the higher the output voltage, and vice versa. The larger the resistance value of force-sensitive resistor RT, the lower the output voltage, and vice versa. The specific formula is U=1.25×(1+(R1÷RT)), where U is the output voltage of pin 3 of the three-terminal adjustable voltage regulating module A1; it can be seen from the above formula that the smaller the resistance value of the force-sensitive resistor RT, the higher the voltage output of pin 3 of the three-terminal adjustable voltage regulating module A1, and vice versa. In actual applications, when the user needs the voltage output from pin 3 of the three-terminal adjustable voltage regulation module A1 to be relatively high, that is, the motor M1 of the electric toothbrush body operates in a higher power mode and the brush head 101 moves up or down relatively quickly, the user's finger presses the contact piece M with a relatively large force (the rubber pad buffers and resets the effect). In this way, the resistance value of the force-sensitive resistor RT becomes smaller, and the voltage output from pin 3 of the three-terminal adjustable voltage regulation module A1 is relatively high. The motor M1 of the electric toothbrush body will operate in a higher power mode and the brush head will move up or down relatively quickly. When the user requires that the voltage output from pin 3 of the three-terminal adjustable voltage regulating module A1 be relatively low, that is, when the motor M1 of the electric toothbrush body operates in a relatively low power mode and the brush head 101 moves up or down relatively slowly, the force exerted by the user's finger on the contact piece M is relatively small. In this way, the resistance value of the force-sensitive resistor RT becomes larger, and the voltage output from pin 3 of the three-terminal adjustable voltage regulating module A1 is relatively low. The motor M1 of the electric toothbrush body will operate in a relatively low power mode and the brush head will move up or down relatively slowly.Through the above, the user can press the contact piece and the force-sensitive resistor by touching the finger, and under the action of the control circuit and the voltage regulating circuit, not only can the internal motor on or off mode be conveniently controlled, but also the motor speed can be adjusted, thereby achieving the purpose of adjusting the up and down movement speed of the brush head, which brings convenience to the user, improves the user experience accordingly, and improves the market competitiveness of the product.

[0019] Figure 2 As shown, transistors Q2 and Q3 are NPN transistors of model 9013; resistor R1 has a resistance of 2K; three-terminal adjustable voltage regulator module A1 has a model of CW317; capacitor C is an electrolytic capacitor with a capacity of 470μF / 25V (filtering function); capacitors C1 and C2 have capacities of 0.1μF and 1μF respectively (filtering function); field effect tube Q1 has a model of 3DJ6; adjustable resistor RP1 has a resistance of 10K; resistor R2 has a resistance of 300Ω; resistor R3 has a resistance of 400Ω; light-emitting diode VL1 is a red light-emitting diode; force-sensitive resistor RT has a model of RP-C18.3-LT. The standby current of this new type is only about 10μA, so even if the power switch S1 is not turned off, the power consumption is very low.

[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the utility model.

[0021] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A new type of electric toothbrush, comprising an electric toothbrush body, a contact sheet, and a force-sensitive resistor, characterized in that: It also has a control circuit, a voltage regulating circuit and a prompt circuit; the front side of the handle of the electric toothbrush body is provided with a mounting hole, the force-sensitive resistor is installed in the mounting hole, and the force-bearing surface of the force-sensitive resistor and the rear side of the contact piece are installed together; the prompt circuit is equipped with at least two metal sheets, and the two metal sheets and the control circuit, the voltage regulating circuit and the prompt circuit are installed in the circuit board compartment; the power input end of the voltage regulating circuit is electrically connected to the power output end of the control circuit, and the power output end of the voltage regulating circuit is electrically connected to the motor power input end of the electric toothbrush body; the contact piece is electrically connected to the signal input end of the control circuit, and the two signal ends of the force-sensitive resistor are electrically connected to the two signal input ends of the voltage regulating circuit respectively.

2. A new electric toothbrush according to claim 1, characterized in that: The force-sensitive resistor is smaller than the inner diameter of the mounting hole, the outer diameter of the contact piece is larger than the outer diameter of the mounting hole, and the contact piece is made of metal.

3. A new type of electric toothbrush according to claim 1, characterized in that: The control circuit includes an electrically connected field effect tube, an adjustable resistor, a transistor, and a capacitor. The drain of the field effect tube is connected to one end of the adjustable resistor and the base of the transistor, the other end of the adjustable resistor is connected to the collector of the transistor, the source of the field effect tube is connected to the negative electrode of the capacitor, and the emitter of the transistor is connected to the positive electrode of the capacitor.

4. A new type of electric toothbrush according to claim 1, characterized in that: The voltage regulating circuit includes an electrically connected capacitor, a three-terminal adjustable voltage regulating module, and a resistor. The power input end of the three-terminal adjustable voltage regulating module is connected to one end of the first capacitor, the output end of the three-terminal adjustable voltage regulating module is connected to one end of the second capacitor, the regulating end of the three-terminal adjustable voltage regulating module is connected to one end of the resistor, and the other end of the resistor is connected to the other ends of the two capacitors.

5. A new electric toothbrush according to claim 1, characterized in that: The prompt circuit includes an electrically connected resistor, a light-emitting diode, and a transistor, and is connected to two metal sheets. The first metal sheet is connected to one end of the first resistor, and the other end of the first resistor is connected to the positive electrode of the light-emitting diode. The second metal sheet is connected to one end of the second resistor, and the other end of the second resistor is connected to the base of the transistor, and the collector of the transistor is connected to the negative electrode of the light-emitting diode.

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