Power supply communication system based on motor shaft and electric toothbrush

Abstract

The embodiment of the utility model discloses a power supply communication system based on a motor shaft and an electric toothbrush. The power supply communication system comprises a mounting groove and a conductive module, the mounting groove is positioned in the motor shaft and is used for arranging the conductive module in the motor shaft; one end of the conductive module is connected with the motor, the other end of the conductive module is connected with the toothbrush head, and the conductive module is used for transmitting electric energy and / or electric signals in the motor into the toothbrush head. The mounting groove is formed in the motor shaft, and the conductive module is arranged in the mounting groove, so that electric energy or electric signals in the motor are transmitted into the toothbrush head through the conductive module, and compared with existing wireless charging, the conductive module is used for supplying electric energy to ensure the effectiveness of power supply; and the cost and the manufacturing process of the conductive module are lower than those of wireless charging, and the conductive module has better electric energy and electric signal transmission performance.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to a power supply and communication system based on a motor shaft and an electric toothbrush. Background Art

[0002] In existing electric toothbrushes, the power supply to the toothbrush head usually uses wireless charging. However, it is difficult to provide a large amount of electric energy and high-speed data signal lines through the motor shaft in wireless charging, which cannot ensure the effectiveness of power supply. Moreover, the manufacturing cost and process requirements of wireless charging are relatively high, and the transmission efficiency is low. Summary of the Invention

[0003] In view of this, the utility model provides a power supply and communication system based on a motor shaft and an electric toothbrush to improve the transmission efficiency.

[0004] The specific technical solution of the first embodiment of the utility model is as follows: A power supply and communication system based on a motor shaft, which is applied to an electric toothbrush. The electric toothbrush includes a toothbrush head, a motor shaft, a motor and a control circuit. The motor drives the toothbrush head to work through the motor shaft. The control circuit is used to supply power to the motor and / or data connection. The system includes: an installation groove and a conductive module; the installation groove is located in the motor shaft, and the installation groove is used to set the conductive module in the motor shaft; one end of the conductive module is connected to the motor, and the other end of the conductive module is connected to the toothbrush head. The conductive module is used to transfer the electric energy and / or electrical signal in the motor to the toothbrush head.

[0005] Preferably, the conductive module includes a wire and a conductive electrode, and an elastic electrode is arranged on the toothbrush head; one end of the wire is connected to the control circuit, the other end of the wire is connected to the conductive electrode, and the conductive electrode is in elastic contact with the elastic electrode; the wire is used to transfer the electric energy and / or electrical signal in the control circuit to the conductive electrode and / or receive the electrical signal from the conductive electrode to the control circuit; the conductive electrode is used to transfer the electric energy and / or electrical signal to the toothbrush head through the elastic electrode and / or receive the electrical signal from the toothbrush head from the elastic electrode.

[0006] Preferably, the wire is a flexible wire or an FPC, and the FPC is a flexible printed circuit board.

[0007] Preferably, there are multiple conductive electrodes, and the multiple conductive electrodes are distributed in a single-row array or a multi-row array.

[0008] Preferably, there are multiple conductive electrodes, and the multiple conductive electrodes are distributed in a closed ring or an open ring.

[0009] Preferably, a waterproof sealing material is arranged in the installation groove.

[0010] Preferably, the system further includes: a fixing bracket for fixing the elastic electrode on the motor shaft.

[0011] Preferably, the system further includes: an electrode elastic hook located on the elastic electrode, and the motor elastic hook is used to provide an elastic pressure stroke for the elastic electrode.

[0012] Preferably, the system further includes: a waterproof ring; the waterproof ring is arranged in the middle area of the motor shaft between the conductive module and the motor, and the waterproof ring is used to waterproof the rear part of the motor shaft waterproof ring.

[0013] The specific technical solution of the second embodiment of the present invention is: an electric toothbrush, including a power supply and communication system based on the motor shaft as described in any one of the first embodiments of this application.

[0014] Implementing the embodiments of the present invention will have the following beneficial effects:

[0015] The present invention includes an installation groove and a conductive module; the installation groove is located in the motor shaft, and the installation groove is used to arrange the conductive module in the motor shaft; one end of the conductive module is connected to the motor, and the other end of the conductive module is connected to the toothbrush head. The conductive module is used to transmit electrical energy and / or electrical signals in the motor to the toothbrush head. By arranging the installation groove in the motor shaft and arranging the conductive module in the installation groove, the electrical energy or electrical signal in the motor is transmitted to the toothbrush head through the conductive module. Compared with the existing wireless charging, using the conductive module to ensure the effectiveness of power supply, and the cost and manufacturing process required for the conductive module are lower than those of wireless charging, and it has better electrical energy and electrical signal transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a power supply and communication system based on the motor shaft;

[0018] Figure 2 It is a schematic structural diagram of the conductive module;

[0019] Figure 3 It is a structural diagram of the fixing bracket;

[0020] Figure 4Schematic diagram of the voltage regulation circuit;

[0021] Figure 5 Schematic diagram of the structure of an electric toothbrush;

[0022] Wherein, 101 is the toothbrush head; 102 is the motor shaft; 103 is the motor; 104 is the control circuit; 105 is the installation groove; 106 is the conductive module; 201 is the wire; 202 is the conductive electrode; 203 is the waterproof sealing material; 204 is the elastic electrode; 301 is the fixing bracket; 401 is the brush head functional circuit board; 402 is the brush head decorative piece; 403 is the front section of the motor shaft; 404 is the rear section of the motor shaft; 405 is the rear bearing of the motor; 406 is the motor end cover. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In a specific embodiment, please refer to Figure 1 , which is a schematic diagram of the structure of a power supply and communication system based on a motor shaft in the first embodiment of the present application, applied to an electric toothbrush, so that the electric energy in the motor is transmitted to the toothbrush head through the conductive module. The electric toothbrush includes a toothbrush head 101, a motor shaft 102, a motor 103, and a control circuit 104. The motor 103 drives the toothbrush head 101 to work through the motor shaft 102. The control circuit 104 is used to supply power to the motor 103 and / or data connection. The power supply and communication system based on the motor shaft is arranged in the motor shaft 102. Specifically, the power supply and communication system based on the motor shaft includes: an installation groove 105 and a conductive module 106; the installation groove 105 is located in the motor shaft 102, and the installation groove 105 is used to arrange the conductive module 106 in the motor shaft 102; one end of the conductive module 106 is connected to the motor 103, and the other end of the conductive module 106 is connected to the toothbrush head 101. The conductive module 106 is used to transmit the electric energy and / or electrical signal in the motor 103 to the toothbrush head 101.

[0025] Specifically, the motor shaft is processed by drilling a cylindrical shaft or grooving a cylindrical through-hole shaft, or by turning / milling / polishing, etc., to set an installation groove in the motor shaft. A platform is provided at the front end of the installation groove for placing the conductive module. At the same time, one end of the conductive module is connected to the control circuit, and the other end of the conductive module is elastically in contact with the conductive electrode through an elastic electrode to be elastically connected to the internal control circuit of the toothbrush head, so that the conductive module transfers the electric energy in the control circuit to the toothbrush head, generating an electrical connection relationship. By setting the installation groove in the motor shaft and arranging the conductive module in the installation groove, the electric energy in the control circuit is transferred to the toothbrush head through the conductive module, and a communication electrical connection may also be formed. Compared with the existing wireless charging power supply method, using the conductive module to ensure the effectiveness of power supply and high-speed data electrical connection, and the cost and manufacturing process required by the conductive module are lower than those of wireless charging, and it has better electric energy and electrical signal transmission performance. Among them, the motor shaft can be a solid shaft processed with a shaft hole or directly use a through-hole shaft and then process it. The motor shaft can be directly processed by one shaft or formed by combining two shafts processed separately (including welding / gluing, etc.) to form a spliced shaft. Specifically, the through-hole shaft has lower strength than the solid shaft, and the shaft part inside the motor will be relatively thin, so using a spliced shaft is beneficial to control the shaft processing cost while ensuring the mechanical strength of the internal part of the motor shaft, thus ensuring the stability of setting the installation groove in the motor shaft.

[0026] In a specific embodiment, the motor shaft can be directly realized by using the metal die-casting molding method. After die-casting molding, surface treatment can be further carried out to make the motor shaft brighter, have higher surface hardness, better corrosion and oxidation resistance characteristics, etc. The motor shaft can also be directly processed from a metal tube to avoid the high-cost drilling process, and then realize the fixed connection of the area that can accommodate the gold fingers and the circuit by potting or in-mold injection molding, etc. The motor shaft can also be a spliced shaft, that is, the motor shaft of the exposed section outside the motor shaft is processed by a metal tube to form a through-hole shaft part, and the connection between the internal shaft section and the exposed section of the motor shaft is processed by a solid shaft, allowing the shaft diameter inside the motor shaft to be thinner and the strength to be higher. The two shafts are spliced and combined by welding or gluing and other processes to form a spliced straight shaft, and the spliced straight shaft has a better balance of cost and shaft mechanical strength.

[0027] The motor shaft electrode assembly can also be realized by the metal electrode wire and engineering plastic injection molding method.

[0028] Preferably, the motor shaft electrode assembly can also adopt the PCB process and use the combination method of a rigid PCB and a flexible PCB (FPC) to realize the motor shaft electrode assembly. Among them, the electrode gold finger part is realized by the rigid PCB using the immersion gold process, and the corrosion resistance and durability are improved by the immersion gold thickness.

[0029] In a specific embodiment, please refer to Figure 2, the conductive module includes a conductive wire 201 and a conductive electrode 202, and an elastic electrode is provided on the toothbrush head; one end of the conductive wire is connected to the control circuit, the other end of the conductive wire is connected to the conductive electrode, and the conductive electrode is in elastic contact with the elastic electrode and can be separated. The elastic electrode is a component inside the toothbrush head and can be replaced simultaneously with the replacement of the toothbrush head; the conductive wire is used to establish an electrical connection between the control circuit and the conductive electrode; the conductive electrode is used to transfer electrical energy to the toothbrush head through the elastic electrode or receive an electrical signal from the toothbrush head.

[0030] Specifically, the elastic electrode can be a gold finger. A gold finger similar to a plug-in terminal is formed at the head of the motor shaft, and a female head of the plug-in is correspondingly arranged at the corresponding position in the brush head to introduce the conductive signal of the motor shaft into the interior of the brush head. This circuit introduction into the brush head supports the transmission of signals with a relatively large current and a relatively high rate. The gold finger at the head of the motor shaft can be designed with a single-sided gold finger or a double-sided gold finger. Using the double-sided gold finger design can increase the number of gold finger pins, thus meeting more signal transmission requirements. Installing the gold finger in the drilled and grooved areas of the motor shaft can also use a mold to install the gold finger circuit board and lines, and directly injection molding can achieve the purpose of fixing the gold finger and protecting the lines as required by the above potting.

[0031] In a specific embodiment, please refer to Figure 2 , a waterproof sealing material 203 is provided in the installation groove. The waterproof sealing material 203 can be an injection molding material or a glue material. The injection molding material can be filled by injection molding using a mold, and the glue material can be processed by a dispensing process during the assembly process. Specifically, the drilled and grooved areas are filled with an insulating material to meet the waterproof and structural shaping requirements. There is a circuit lead-out area at the rear end of the grooved area of the motor shaft. Preferably, a planar area can be provided, and a circuit lead-out circuit board can be installed in this area, and circuit functions such as signal conversion, mechanical stress sensors, and torsional stress sensors can be installed on the circuit board. Installing the gold finger in the drilled and grooved areas of the motor shaft can also use a mold to install the gold finger circuit board and lines, and directly injection molding can achieve the purpose of fixing the gold finger and protecting the lines as required by the above potting.

[0032] Specifically, there is a circuit board on the bushing of the toothbrush head, and the circuit board contains an elastic electrode 204, which corresponds to the electrode of the motor shaft one by one, and 1-2 elastic electrodes can be added to the metal area of the motor shaft to increase the connection ability and contact performance. The toothbrush head is a regularly consumable accessory. Therefore, usually, the elastic electrode is arranged in the toothbrush head rather than on the side of the motor shaft. The circuit board in the toothbrush head can match the corresponding circuit functions for the lead-out circuit of the motor shaft. For example, it can be connected to an image sensor to take pictures, connected to a light for illumination, and connected to a sensor to obtain a sensing signal and send it to the toothbrush handle through the conductive electrode module of the motor shaft.

[0033] In a specific embodiment, the conductive wire is a flexible wire or an FPC (flexible printed circuit board). Specifically, it is difficult to provide electrical energy and high-speed data signal lines through the motor shaft in the prior art. Since the components driven by the motor shaft are in motion, and the currently mainly used motor is a swing motor, usually with a swing angle less than 10 degrees and a maximum of no more than 45 degrees, the lead wire does not need to use a brush. By adopting this solution, the front end of the motor shaft can be changed into a form of an electrical signal connector, and the manufacturing cost and process are not high. It can realize the electrical connection from the control circuit in the motor stator position area to the lead-out end of the conductive wire to provide electrical energy and high-speed signal connection ability to the moving components driven by the motor shaft, so that the moving components can use electrical equipment with high current consumption and electrical equipment with high-speed data interaction requirements. It is especially suitable for the motor shaft in the swing mode. Specifically, a rotary brush electrode method is adopted at the position of the motor shaft lead wire, so that it can be used for power supply in a rotary motor. The currently preferred solution is for a swing motor, that is, the motor shaft swings within a 20-degree angle range. Therefore, the flexible wire or FPC (flexible printed circuit board) will not be very entangled with the motor shaft and cause breakage, but will swing back and forth.

[0034] Specifically, there are two forms of circuit lead-out of the motor shaft. One is that the insulated split leads pass through the shaft hole for welding, and the other is that the FPC passes through the shaft hole for welding or connector connection. Both connection forms can form an electrical connection between the conductive electrode electrical signal and the control circuit in the toothbrush handle.

[0035] Specifically, the lead wire of the conductive electrode is connected from the motor shaft groove or the inside to the middle of the motor shaft (in front of the magnet coil area of the rotor and stator). There can be a flattened plane or a deep groove in the area where the electrode is led out. This plane or groove is suitable for assembling the circuit board to lead out the electrode and installing other circuit devices. The bearing can be one or more, and can be a rotary bearing or a linear bearing, etc.

[0036] In a specific embodiment, there are multiple conductive electrodes, and the multiple conductive electrodes are distributed in a single-row array or a multi-row array. Specifically, the conductive electrodes at the front of the motor shaft can be arranged in one or more vertical bar shapes, or one or more horizontal bar shapes, or distributed in a multiple island shape array. The lead-out conductive electrode is located in the power output area at the front of the motor shaft. The conductive electrode can be on the flattened plane of the output shaft of the motor shaft, or the conductive electrode can be led out on the non-flattened arc surface.

[0037] In a specific embodiment, there are multiple conductive electrodes, and the multiple conductive electrodes are distributed in a closed ring or an open ring. Specifically, when used for a continuous rotating motion motor, the electrode lead-out in the middle of the motor shaft adopts a ring-shaped (may be open) electrode and is led out by a brush, and better power supply and signal continuity can be obtained by saving the ring-shaped (360 degree) electrode. When the ring is not closed (less than 360 degrees, with a gap in the middle), the end receiving electricity can be used to increase the capacitor or inductor or capacitor + inductor, or a battery or other energy storage module to achieve instant power off when the signal is released.

[0038] In a specific embodiment, when there is only one conductive electrode, the motor shaft is used as another conductive electrode, and combined with the modulated signal communication on the power line of the electric toothbrush, the communication of electrical energy and electrical signals is realized.

[0039] In a specific embodiment, on a rotating motor, the electrode lead-out position shape can also be modified into a ring-shaped brush type, wherein the ring does not need to be continuous, and energy storage is used at the device end driven by the motor shaft to deal with wire breakage caused by ring discontinuity.

[0040] When used for a reciprocating toothbrush (rotational reciprocating or telescopic reciprocating or simultaneous rotational + telescopic reciprocating), the conductive electrode can be led out using a platform, and the soft wire can be directly led out and connected to the circuit unit by utilizing the characteristic of small swing amplitude.

[0041] In the specific embodiments, see Figure 3 The power supply communication system based on the motor shaft also includes: a fixing bracket 301, which is used to fix the conductive electrode on the motor shaft. Specifically, there is a shaft sleeve fixing part on the brush head, which matches and interlocks with the platform of the motor shaft.

[0042] In a specific embodiment, the motor shaft-based power supply communication system further includes: an electrode elastic hook, the electrode elastic hook is located on the conductive electrode, and the motor elastic hook is used to provide a pressure stroke for the elastic electrode. Specifically, the toothbrush head is a detachable and regularly replaced component, so the elastic electrode is for the reliability of the electrical connection on the one hand, and for the detachable design on the other hand, to achieve regular replacement of the toothbrush head.

[0043] In a specific embodiment, the power supply communication system based on the motor shaft further includes: a waterproof ring; the waterproof ring is arranged in the middle area of ​​the motor shaft between the conductive module and the motor, and the waterproof ring is used to waterproof the rear of the motor shaft waterproof ring. Specifically, the shaft end between the electrode at the front of the motor shaft and the electrode at the middle of the motor shaft is still cylindrical, so as to be suitable for installing the waterproof ring, and this part of the shaft can include an annular groove or protrusion for enhancing the waterproof performance, so as to prevent water from leaking into the motor through the motor shaft wall and causing damage to the motor.

[0044] Specifically, in one embodiment, the lead portion is implemented in the form of a flexible PCB. The electrical signal is passed through the motor shaft hole by using the flexible board (flexible circuit board), and the electrical signal is introduced to the rear of the motor shaft waterproof ring. The flexible circuit board design of the lead-out section can be a double-fork or triple-fork or multi-fork structure. After folding the multi-forks into the form of a long flexible circuit board that can pass through the shaft hole regularly, it is inserted into the shaft hole, and the multi-forks are used to achieve a larger electrode lead-out area, so as to realize the connection of multiple signals through the thinner holes of the shaft hole, and make the signal electrodes at both ends have a larger area for facilitating the operation of electrical signal connection.

[0045] The circuit board combination method can be realized by separately processing the PCB hard disk and the PCB software and then combining them by using the welding process, or by adopting the PCB rigid-flexible combination board process to directly manufacture the integrated combination of the rigid board and the flexible board.

[0046] The electrodes of the rigid circuit board are preferably processed with a pitch of 0.65 mm and a gold finger width of 0.35 mm, so as to meet the Micro USB standard at the physical layer and facilitate the use of mature microUSB connector elastic electrode accessories in the elastic electrode assembly.

[0047] The motor shaft electrode assembly can also use the precision connector injection molding manufacturing process. The mold is used to directly inject the stamping electrode wire and the plastic filling material to achieve the gold finger pitch and gold finger size required by the electrodes, and the led-out stamping electrode wire is welded to the flexible circuit board, so as to realize a structure similar to the above-mentioned PCB rigid-flexible combination process. The reason for preferring the PCB process is that the process cost is relatively lower. However, the electrode assembly manufactured by the precision connector injection molding process has better durability, and can be selected first in the case of products with high durability requirements when the cost can be increased.

[0048] For the elastic electrode assembly in the brush head, the elastic electrode fitting process of the microUSB processing standard is preferably adopted, and it supports up to 5 signal lines at most. Other elastic electrode designs can also be adopted. This embodiment is a preference from the cost perspective because the MciroUSB fitting process is mature and the molds are all existing molds without the need for additional design. However, when the double-sided arrangement of electrodes in the motor shaft is adopted for the electrodes in this case, the mold for processing the elastic electrodes needs to be redesigned.

[0049] Preferably, the power supply and communication system based on the motor shaft further includes an elastic electrode bracket, which can directly lock into an elastic electrode assembly of a MicroUSB, and provides an insertion guide groove and an elastic locking hook for the motor shaft, which can restrict the limiting position of the motor shaft insertion and control the insertion and extraction force.

[0050] Preferably, 5 signal lines are used for connecting the signal lines. Among them, 2 signal lines are respectively used for the positive and negative power supplies; the other three signals are high-speed signal lines, which can be used for USB differential signals, SPI high-speed clock and data signals, or low-speed UART signals, or analog signals (including signal transmission realized by using the power supply voltage or the signal line voltage level).

[0051] Preferably, the power supply comes from the handle end of the electric toothbrush. By using the voltage adjustable ability of the power supply in the handle, as an analog control signal, it is used to control the exposure time and photosensitivity control of the image sensor in the internal circuit of the brush head. In the circuit design, a voltage regulator is used inside the brush head to obtain a stable power supply voltage for the camera and the peripheral circuit. At the same time, the amplitude of the power supply signal before voltage regulation is used to control the photosensitivity and exposure of the image sensor. Typically, when the power supply is adjusted between 3V and 5V, the longest exposure time and photosensitivity can be obtained at 5V, and the shortest exposure time and photosensitivity can be obtained at 3V. A corresponding linear adjustment of the exposure time and photosensitivity is performed between 3V and 5V. The purpose of this design can save a signal line and complete the transmission of the analog control signal while using the power supply.

[0052] In a specific embodiment, the power supply and communication system based on the motor shaft further includes a voltage regulation circuit, such as Figure 4 shown, U1 is a voltage regulation chip, and the output voltage is 3V to 5V; the toothbrush handle controls the output voltage of the voltage regulation chip through two networks, I2C_SCL and I2C_SDA.

[0053] In a specific embodiment, please refer to Figure 5 , which is a schematic structural diagram of an electric toothbrush in the second embodiment of the present application, including the power supply and communication system based on the motor shaft as described in any one of the first embodiments of the present application.

[0054] Specifically, the toothbrush head 101 includes a brush head housing and bristles implantation. The brush head housing and bristles implantation are the processes of the toothbrush head. The bristles are fixed to the top of the brush head housing using production processes, and the function is to achieve the physical cleaning function of the teeth with the bristles. The toothbrush head 101 can be an intelligent brush head. In the intelligent brush head, in addition to different physical cleaning functions achieved by the bristles implantation process, a functional circuit part will be added inside: in the application, it is a brush head functional circuit board 401, such as a camera circuit board, which can achieve the function of taking pictures, and the content taken will pass through the elastic electrode 204, and then enter the control circuit in the electric toothbrush handle through the electrode piece of the motor shaft 102. The control circuit analyzes the image to achieve corresponding actions, such as analyzing the target tooth position number for brushing, the cleaning degree of the brushing area, whether there are health problems with the teeth, etc. The elastic electrode 204 is a component used to cooperate with the electrode piece on the motor shaft 102, and is made using the process of precision connectors, which can meet the connection of elastic multi-pin data lines with small dimensions. Elasticity is to avoid non-contact and ensure good electrical performance at the contact points. The electrode and the fixing bracket 301 contain electrodes. Actually, there are similar components in ordinary brush heads (only the electrodes are not considered), that is, different brush heads contain fixing brackets, which are used to establish a reasonable assembly relationship between the brush head housing and the shaft: by reasonable, it means controlling the force value when the motor shaft 102 is inserted and connected to and pulled out from the brush head. The insertion and extraction force cannot be too large (it will be difficult to use), nor too small (it is easy to fall off), usually controlled by a force of about 5N (Newton). The key control method is achieved through the structural design details of this fixing bracket 301, including the control of the fit tolerance and the design of the elastic locking hook in the fixing bracket. In this application, since it is an intelligent brush head, this fixing bracket is also used to fix the elastic electrode parts and control the positional relationship constraint between the elastic electrode and the motor shaft. The constraint accuracy requirement is very high to ensure that there will be no problem of misalignment of the elastic electrode pins when the motor shaft is inserted into the brush head. The shaft fixing bracket also has the function of guiding the insertion of the motor shaft to ensure that the motor shaft will not shake when inserted, even under the high-speed vibration of the motor shaft, there will be no abnormal noise and collision caused by gaps. The brush head decorative piece 102 is optional and may not exist. Its main purpose is for decoration. In some brush heads, an electronic tag may be implanted in the decorative piece for controlling the anti-counterfeiting of the brush head and recording the usage data of the brush head (NFC). The front section 403 and the rear section 404 of the motor shaft depend on the scheme and fall into two major scheme categories: 1. The motor shaft is an integral shaft; 2. The motor shaft is a spliced shaft. In this example of this application, it is a spliced shaft; the two schemes are mainly considered from the aspects of process cost. The purpose is to enable the front part of the motor shaft to install the electrode piece and thread the lead into the motor shaft and connect it to the inside of the toothbrush handle. The motor rear bearing 405 is a shaft fixing part used to reduce friction. Some motors have only one bearing, some have two, some can be rolling bearings (rotary motion), some can be linear bearings (linear motion), or fixed bearings that can perform both rotary and linear motions.The inner part of the motor shaft inside the motor 103 is used to fix the inner rotor assembly of the motor; the motor housing is used to fix the stator assembly of the motor, but in fact, there is also an outer rotor motor design; that is, the motor shaft still fixes the rotor assembly, but the rotor is not a connecting shaft to the rear motor end cover, but is exposed outside (bent), and the stator of the motor is installed in the avoided area in the middle. That is, for outer rotor motors and inner rotor motors, the motor end cover 406 is usually fixed for leading out the motor leads and for fixing the motor.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A power supply and communication system based on a motor shaft, applied to an electric toothbrush, wherein the electric toothbrush comprises a toothbrush head, a motor shaft, a motor and a control circuit, wherein the motor drives the toothbrush head to work through the motor shaft, and the control circuit is used to provide power and / or data connection for the motor, characterized in that: The system comprises: a mounting slot and a conductive module; The mounting groove is located in the motor shaft, and the mounting groove is used to set the conductive module in the motor shaft; One end of the conductive module is connected to the motor, and the other end of the conductive module is connected to the toothbrush head. The conductive module is used to transfer the electrical energy and / or electrical signals in the motor to the toothbrush head.

2. The motor shaft-based power supply communication system according to claim 1, characterized in that: The conductive module includes a conductive wire and a conductive electrode, and an elastic electrode is arranged on the toothbrush head; One end of the conductive wire is connected to the control circuit, the other end of the conductive wire is connected to the conductive electrode, and the conductive electrode is in elastic contact with the elastic electrode; The conductive wire is used to transfer the electric energy and / or electric signal in the control circuit to the conductive electrode and / or receive the electric signal from the conductive electrode to the control circuit; The conductive electrode is used to transfer the electrical energy and / or electrical signal to the toothbrush head through the elastic electrode and / or receive the electrical signal from the toothbrush head from the elastic electrode.

3. The motor shaft-based power supply communication system according to claim 2, characterized in that: The conductive wire is a soft wire or an FPC, and the FPC is a flexible printed circuit board.

4. The motor shaft-based power supply communication system according to claim 2, characterized in that: There are multiple conductive electrodes, and the multiple conductive electrodes are distributed in a single-row array or a multi-row array.

5. The motor shaft-based power supply communication system according to claim 2, characterized in that: There are multiple conductive electrodes, and the multiple conductive electrodes are distributed in a closed ring shape or an open ring shape.

6. The motor shaft-based power supply communication system according to claim 1, characterized in that: A waterproof sealing material is arranged in the installation groove.

7. The motor shaft-based power supply communication system according to claim 2, characterized in that: The system further comprises: a fixing bracket, which is used to fix the elastic electrode on the motor shaft.

8. The motor shaft-based power supply communication system according to claim 2, characterized in that: The system further comprises: an electrode elastic hook, wherein the electrode elastic hook is located on the elastic electrode and is used for providing an elastic pressure stroke for the elastic electrode.

9. The motor shaft-based power supply communication system according to claim 1, characterized in that: The system further includes: a waterproof ring; the waterproof ring is arranged in the middle area of ​​the motor shaft between the conductive module and the motor, and the waterproof ring is used to waterproof the rear part of the motor shaft waterproof ring.

10. An electric toothbrush, characterized in that: It comprises a motor shaft-based power supply communication system as claimed in any one of claims 1 to 9.

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