CN220938218U - Electric oral cavity cleaning device - Google Patents

Abstract

The utility model discloses an electric oral cavity cleaning device. The electric oral cleaning device comprises: a handle, a cleaning head and a rotating shaft; the rotating shaft part is positioned in the handle, when the cleaning head is arranged on the handle, the rotating shaft part is positioned in the cleaning head, and the rotating shaft is configured to drive the cleaning head to move when moving; one end of the handle for mounting the cleaning head is provided with a permanent magnet; one end of the cleaning head, which is used for being arranged on the handle, is provided with at least one coil array, and the coil array is configured to cut magnetic force lines of the permanent magnet and generate electric energy when the cleaning head moves. The technical scheme of the embodiment of the utility model realizes self-sufficiency of power supply inside the cleaning head, improves the safety of power supply for the electric devices on the cleaning head, and saves energy.

Description

Electric oral cavity cleaning device

Technical Field

The utility model relates to the technical field of electric devices, in particular to an electric oral cavity cleaning device.

Background

With the rapid development of electric oral cleaning tools, the functions of electric oral cleaning tools are increasing.

The electric oral cavity cleaning tool not only comprises bristles for cleaning, but also can be provided with devices such as a sterilizing lamp for sterilizing the oral cavity.

The electric oral cavity cleaning tool has the advantages that devices such as a sterilizing lamp and the like need to be connected with a power supply for use, and as the cleaning head of the electric oral cavity cleaning tool is a moving part or has high waterproof requirement, bare electrodes cannot be directly manufactured for power supply, and a power supply module in a handle is used for power supply, a connecting wire is needed to be connected to an electric device in the brush head, so that electric wires are exposed; and the brush head moves continuously, so that direct electrical connection with the handle is not easy to establish, and power is difficult to supply to the electric device in the brush head.

Disclosure of utility model

The utility model provides an electric oral cavity cleaning device which is used for solving the problem that electric appliances in a brush head are difficult to supply power.

The present utility model provides an electric oral cleaning device comprising: a handle, a cleaning head and a rotating shaft; the rotating shaft part is positioned in the handle, when the cleaning head is mounted on the handle, the rotating shaft part is positioned in the cleaning head, and the rotating shaft is configured to drive the cleaning head to move when moving;

one end of the handle for mounting the cleaning head is provided with a permanent magnet;

The cleaning head is used for being installed on one end of the handle and is provided with at least one coil array, and the coil array is configured to cut magnetic force lines of the permanent magnet and generate electric energy when the cleaning head moves.

Optionally, the coil array comprises a plurality of coil units; all the coil units are connected in series or parallel; or part of the coil units are connected in series, and the other part of the coil units are connected in parallel.

Optionally, the coil unit comprises a multi-turn coil wound with at least one strand of semiconductor wire.

Optionally, when the cleaning head is mounted on the handle, a spacing between the coil array and the permanent magnet is less than a preset threshold.

Optionally, the electric oral cleaning device further comprises an energy storage module;

The energy storage module is positioned inside the cleaning head and connected with the coil array, and the energy storage module is configured to store electric energy generated by the coil array.

Optionally, the energy storage module comprises a capacitor and/or a battery.

Optionally, the electric oral cleaning device further comprises a rectifying module;

the rectification module is connected between the energy storage module and the coil array.

Optionally, the rectifying module includes a full bridge rectifying circuit or a half-wave rectifying circuit.

Optionally, the electric oral cleaning device further comprises a light emitting module;

The light emitting module is connected with the coil array, and the light emitting module is configured to emit light according to electric energy generated by the coil array.

Optionally, the light emitting module includes a first light emitting diode and a second light emitting diode;

The first pole of the first light-emitting diode is electrically connected with the first output end of the coil array, and the second pole of the first light-emitting diode is electrically connected with the second output end of the coil array;

The first pole of the second light emitting diode is electrically connected with the second output end of the coil array, and the second pole of the second light emitting diode is electrically connected with the first output end of the coil array.

According to the technical scheme, the permanent magnet is arranged on the handle of the electric cleaning device, at least one coil array is arranged on the cleaning head, when the cleaning head is fixed on the handle, the rotating shaft moves to drive the cleaning head to vibrate, so that the coil array is driven to vibrate, the coil array cuts magnetic force lines of the permanent magnet, and alternating current, namely electric energy, is generated. The electric energy generated by the coil array can supply power for the electric device on the cleaning head, so that a power supply module in the handle or external power supply equipment is not needed to supply power for the electric device on the cleaning head, self-sufficiency of power supply inside the cleaning head is realized, the exposure of electrodes or wires is avoided, the safety of the electric cleaning device is ensured, and energy sources are saved.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an electric oral cleaning apparatus according to an embodiment of the present utility model;

fig. 2 is a schematic view of a handle of an electric oral cleaning apparatus according to an embodiment of the present utility model;

Fig. 3 is a schematic view of a cleaning head of an electric oral cleaning apparatus according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a coil array according to an embodiment of the present utility model;

Fig. 5 is a schematic circuit diagram of an electric cavity cleaning device according to an embodiment of the present utility model;

FIG. 6 is a schematic circuit diagram of a further electric cavity cleaning apparatus according to an embodiment of the present utility model;

FIG. 7 is a schematic circuit diagram of a further electric cavity cleaning apparatus according to an embodiment of the present utility model;

FIG. 8 is a schematic circuit diagram of a further embodiment of an electric cavity cleaning apparatus;

FIG. 9 is a schematic circuit diagram of a further electric cavity cleaning apparatus according to an embodiment of the present utility model;

FIG. 10 is a schematic circuit diagram of a further embodiment of a powered cavity cleaning device;

Fig. 11 is a schematic circuit diagram of still another electric cavity cleaning apparatus according to an embodiment of the present utility model.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Along with people's importance to the oral cavity problem, electric oral cavity cleaning tool's function is more and more abundant, sets up the device such as camera or bactericidal lamp on the cleaning head and shoots the oral cavity, bactericidal lamp operation, but electric oral cavity cleaning tool's cleaning head is detachable relative to the handle, so be difficult to for the epaxial electrical equipment power supply of cleaning through the inside power module of handle, the waterproof requirement of cleaning head is higher moreover, can't use bare electrode power supply, the epaxial electrical equipment of cleaning has the problem of power supply difficulty.

In view of the above technical problems, the present embodiment provides an electric oral cleaning device, fig. 1 is a schematic structural view of the electric oral cleaning device provided by the embodiment of the present utility model, fig. 2 is a schematic structural view of a handle of the electric oral cleaning device provided by the embodiment of the present utility model, fig. 3 is a schematic structural view of a cleaning head of the electric oral cleaning device provided by the embodiment of the present utility model, and referring to fig. 1, fig. 2 and fig. 3, the electric oral cleaning device includes: a handle 110, a cleaning head 120, and a spindle 130; the rotating shaft 130 is partially positioned in the handle 110, when the cleaning head 120 is installed on the handle 110, the rotating shaft 130 is partially positioned in the cleaning head 120, and the rotating shaft 130 is configured to drive the cleaning head 120 to move when moving; one end of the handle 110 for mounting the cleaning head 120 is provided with a permanent magnet 140; the cleaning head 120 is provided with at least one coil array 150 at one end for mounting on the handle 110, the coil array 150 being configured to cut magnetic lines of force of the permanent magnet 140 and generate electrical energy when the cleaning head 120 is moved.

The cleaning head 120 may be provided with, for example, bristles, a camera, a sensor, a sterilizing lamp, or the like, so as to clean, sterilize, or photograph the oral cavity. The cleaning head 120 is detachable with respect to the handle 110, one end of the rotating shaft 130 is fixed inside the handle 110, and when the cleaning head 120 is to be mounted on the handle 110, the cleaning head 120 can be fixed at the other end of the rotating shaft 130, so that the rotating shaft 130 drives the cleaning head 120 to move when moving, thereby cleaning the inside of the oral cavity. When the cleaning head 120 is mounted on the handle 110, the coil array 150 is closely spaced from the permanent magnet 140, so that the coil array 150 cuts the magnetic lines of force of the permanent magnet 140. Wherein the permanent magnet 140 is, for example, a ring-shaped permanent magnet, and the coil array 150 is, for example, a ring-shaped coil array, so that the rotation shaft 130 passes through the permanent magnet 140 and the coil array 150, i.e., so that the cleaning head 120 is fixed on the rotation shaft 130. In some embodiments, the permanent magnet 140 and the coil array 150 may be circular, and in other embodiments, the permanent magnet 140 and the coil array 150 may be square, which may be determined according to the processing technology or the shapes of the handle 110 and the cleaning head 120, which is not limited in this example.

Specifically, a motor connected to the rotating shaft 130 is disposed in the handle 110, and the motor drives the rotating shaft 130 to move when running, so that the cleaning head 120 is driven to move when the rotating shaft 130 moves. When the cleaning head 120 moves, for example, the cleaning head 120 vibrates according to a certain frequency, so that the coil array 150 cuts the magnetic lines of force of the permanent magnet 140, and the magnetic field dynamic cutting is realized, thereby generating induced electromotive force, that is, generating an alternating current signal, and generating electric energy. In some embodiments, the output of the coil array 150 may be connected to an energy storage device that stores generated electrical energy, and the energy storage device provides power to electrical devices (e.g., cameras, germicidal lamps, or sensors, etc.) within the cleaning head 120 or on the cleaning head 120 when such devices are needed; in some embodiments, the output of the coil array 150 may be directly connected to and directly power the consumer device. Thus, self-sufficiency of power supply of the cleaning head 120 is realized, a power supply module inside the handle or external power supply equipment is not needed to supply power to the electric devices on the cleaning head 120, the exposure of electrodes or wires is avoided, and the safety of the electric cleaning device is ensured. Moreover, the vibration of the cleaning head 120 generates electric energy without providing a power supply battery or a charger, thereby saving energy. In addition, the characteristics of the permanent magnet 140 enable the permanent magnet 140 to generate a magnetic field without power connection, so that energy sources are further saved, and power consumption is reduced.

In addition, the number of the coil arrays 150 may be one or more, and when one coil array 150 is provided, the cost can be reduced, and the weight and volume of the electric cleaning apparatus can be reduced. When the plurality of coil arrays 150 are arranged, the plurality of coil arrays 150 can be connected in series or in parallel, so that the efficiency of electric energy generation can be improved, the output current can be increased, and the electric devices on the cleaning head 120 can be better powered; or the coil arrays 150 are independent of each other, each coil array 150 may supply power to one electric device, i.e., different coil arrays 150 supply power to different electric devices, thereby realizing simultaneous power supply to multiple electric devices. When the number of the coil arrays 150 is at least two, the sizes of the different coil arrays 150 are different, for example, so that the coil array 150 with a larger size is sleeved outside the coil array 150 with a smaller size, and thus each coil array 150 can cut magnetic force lines of the permanent magnet 140 when moving along with the cleaning head 120, thereby generating electric energy.

According to the technical scheme, the permanent magnet is arranged on the handle of the electric cleaning device, at least one coil array is arranged on the cleaning head, when the cleaning head is fixed on the handle, the rotating shaft moves to drive the cleaning head to vibrate, so that the coil array is driven to vibrate, magnetic lines of force of the permanent magnet are cut by the coil array, alternating current is generated, and electric energy is generated. The electric energy generated by the coil array can supply power for the electric device on the cleaning head, so that a power supply module in the handle or external power supply equipment is not needed to supply power for the electric device on the cleaning head, self-sufficiency of power supply inside the cleaning head is realized, the exposure of electrodes or wires is avoided, the safety of the electric cleaning device is ensured, and energy sources are saved.

On the basis of the above-mentioned scheme, fig. 4 is a schematic structural diagram of a coil array according to an embodiment of the present utility model, and optionally, referring to fig. 4, a coil array 150 includes a plurality of coil units 151; all the coil units 151 are connected in series or parallel; or a part of the coil units 151 are connected in series and another part of the coil units 151 are connected in parallel.

Specifically, a coil is wound into the coil units 151, and then a plurality of coil units 151 are connected to form the coil array 150. In some embodiments, the plurality of coil units 151 are connected end to form the coil array 150, i.e., the plurality of coil units 151 are connected in series to form the coil array 150, thereby facilitating control of the shape of the coil array 150. For example, when the coil array 150 is in a circular shape, the coil is first wound into a fan-shaped coil unit 151, and a plurality of coil units 151 are connected in series to form a circular coil array. In some embodiments, a plurality of coil units 151 may be connected in parallel to form the coil array 150, which is advantageous in reducing impedance and improving current output capability of the coil array 150. In some embodiments, a partial number of coil units 151 may be connected in series, another partial number of coil units 151 may be connected in parallel, and then two partial coil units 151 may be connected to form the coil array 150, thereby meeting the requirements of the power device for the power supply current and the power supply voltage.

The coil unit 151 may be a sector, a cube, or a cylinder, and the present embodiment is not limited thereto.

Alternatively, referring to fig. 4, the coil unit 151 includes a multi-turn coil wound with at least one strand of semiconductor wire.

Specifically, for example, a multi-turn coil formed by winding at least one semiconductor wire is etched on a wafer, and then an alloy material is filled to form the final coil unit 151. The coil unit 151 fabricated by the wafer is small in volume, compared to a conventional coil wound with an enamel wire, so that a plurality of coil arrays 150 are conveniently provided on the cleaning head 120, enhancing current output capability. In addition, the coil unit 151 can be a multi-turn coil formed by winding a strand of semiconductor wire, so that the cost can be reduced, and the preparation efficiency can be improved; the coil unit 151 may be a multi-turn coil formed by winding a plurality of strands of semiconductor wires, so that the impedance can be reduced and the current output capability can be enhanced.

It should be noted that fig. 4 exemplarily illustrates a case where the coil unit 151 includes four strands, that is, after all the coil units 151 are connected, four first output terminals A1 and four second output terminals A2 are left, the four first output terminals A1 of the coil unit 151 are commonly used as the first output terminals of the coil array 150, and the four second output terminals A2 of the coil unit 151 are commonly used as the second output terminals of the coil array 150. The first output terminal A1 is, for example, a positive electrode, and the second output terminal A2 is, for example, a negative electrode; alternatively, the first output terminal A1 is a negative electrode, and the second output terminal A2 is a positive electrode, which is not limited in this embodiment. In other embodiments, the coil unit 151 may also include three strands or five strands, which is not limited in this example.

Alternatively, with continued reference to FIG. 1, when the cleaning head 120 is mounted on the handle 110, the spacing between the coil array 150 and the permanent magnet 140 is less than a preset threshold.

Specifically, the distance between the coil array 150 and the permanent magnet 140 is a magnetic gap, and when the distance is smaller, the surface magnetic field of the permanent magnet 140 can be regarded as a uniform magnetic field, the swing amplitude of the cleaning head 120 can reach a movement range of ±5 degrees to ±10 degrees, the vibration frequency can reach 80 to 400Hz, and a stable alternating current signal can be generated along with the reciprocating cutting of magnetic lines of force by the coil array 150. Therefore, the smaller the magnetic gap, the stronger and more uniform the magnetic field that the coil array 150 cuts, and the higher the power generation efficiency of the coil array 150. Therefore, by setting the interval between the coil array 150 and the permanent magnet 140 to be smaller than the preset threshold value, the power generation efficiency of the coil array 150 can be improved. The preset threshold value is, for example, 0.6mm or 0.5mm, and this embodiment is not limited thereto.

Based on the above-mentioned aspects, in some implementations, fig. 5 is a schematic circuit diagram of an electric cavity cleaning device according to an embodiment of the present utility model, fig. 6 is a schematic circuit diagram of another electric cavity cleaning device according to an embodiment of the present utility model, fig. 5 shows a case where a plurality of coil units 151 are connected in series to form a coil array 150, and fig. 6 shows a case where a plurality of coil units 151 are connected in parallel to form a coil array 150. Optionally, referring to fig. 5 and 6, the electric oral cleaning apparatus further comprises an energy storage module 160; the energy storage module 160 is located inside the cleaning head 120 and is connected to the coil array 150, and the energy storage module 160 is configured to store electric energy generated by the coil array 150.

Specifically, the coil array 150 has a first output terminal, such as a positive output terminal, and a second output terminal, such as a negative output terminal. The energy storage module 160 is connected between the first output terminal and the second output terminal of the coil array 150, for example, so as to store the electric energy generated by the coil array 150, so as to supply power to the electric device on the cleaning head 120 when the electric device needs to operate.

Alternatively, referring to fig. 5 and 6, the energy storage module 160 includes a capacitor C1 and/or a battery BT1.

Specifically, in some embodiments, the energy storage module 160 includes a capacitor C1, and the capacitor C1 has high charging and discharging efficiency, so that rapid power supply can be realized. In some embodiments, the energy storage module 160 includes a battery BT1, where the battery BT1 may store a larger amount of energy and may provide a longer current to the powered device. In some embodiments, the energy storage module 160 includes a capacitor C1 and a battery BT1, where the capacitor C1 may also filter out clutter, so that the energy storage module 160 achieves a better energy storage effect. Fig. 5 and 6 exemplarily illustrate a case where the energy storage module 160 includes the capacitor C1 and the battery BT1, but are not limited thereto.

Optionally, referring to fig. 5 and 6, the electric oral cleaning apparatus further comprises a rectification module 170; the rectifying module 170 is connected between the energy storage module 160 and the coil array 150.

Specifically, the energy storage module 160 stores a dc signal, so the rectification module 170 is required to convert the ac signal generated by the coil array 150 into a dc signal, so that the storage module 160 stores the electric energy generated by the coil array 150, so that the storage module 160 can supply power to the electric device when the electric device on the cleaning head 120 works.

In one implementation, fig. 7 is a schematic circuit diagram of still another electric cavity cleaning apparatus according to an embodiment of the present utility model, and optionally, referring to fig. 7, the rectifying module 170 includes a full-bridge rectifying circuit. As shown in fig. 7, the full-bridge rectifier circuit includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4, wherein a first pole of the first diode D1 is grounded, and a second pole of the first diode D1 is connected to a first pole of the second diode D2; a first pole of the second diode D2 is connected to the first output terminal of the coil array 150, and a second pole of the second diode D2 is connected to the first terminal of the energy storage module 160; the first electrode of the third diode D3 is grounded, and the second electrode of the third diode D3 is connected with the second output end of the coil array 150; the first pole of the fourth diode D4 is connected to the second pole of the third diode D3, the second pole of the fourth diode D4 is connected to the first end of the energy storage module 160, and the second end of the energy storage module 160 is grounded. In this way, when the rectifying module 170 includes a full bridge rectifying circuit, all (forward and reverse) alternating currents can be converted into direct currents, so that the energy storage module 160 can better store the electric energy generated by the coil array 150.

Fig. 7 shows a case where a plurality of coil units 151 are connected in parallel to form a coil array 150, but is not limited thereto.

In another implementation, fig. 8 is a schematic circuit diagram of still another electric cavity cleaning device according to an embodiment of the present utility model, and fig. 9 is a schematic circuit diagram of still another electric cavity cleaning device according to an embodiment of the present utility model, and optionally, referring to fig. 8 and fig. 9, the rectification module 170 includes a half-wave rectification circuit. Fig. 8 shows a case where a plurality of coil units 151 are connected in parallel to form a coil array 150, and fig. 9 shows a case where a plurality of coil units 151 are connected in series to form a coil array 150. As shown in fig. 8 and 9, the half-wave rectification circuit includes a fifth diode D5, a first pole of the fifth diode D5 is connected to the first output terminal of the coil array 150, and a second pole of the fifth diode D5 is connected to the first terminal of the energy storage module 160; a second output of the coil array 150 is connected to a second end of the energy storage module 160. In this manner, when the rectification module 170 includes a half-wave rectification circuit, the alternating current in the forward direction or the reverse direction can be converted into the direct current.

In some implementations, fig. 10 is a schematic circuit diagram of still another electric cavity cleaning apparatus provided by an embodiment of the present utility model, and fig. 11 is a schematic circuit diagram of still another electric cavity cleaning apparatus provided by an embodiment of the present utility model, optionally, referring to fig. 10 and 11, the electric oral cavity cleaning apparatus further includes a light emitting module 180; the light emitting module 180 is connected to the coil array 150, and the light emitting module 180 is configured to emit light according to the power generated from the coil array 150.

Specifically, fig. 10 shows a case where a plurality of coil units 151 are connected in parallel to form a coil array 150, and fig. 11 shows a case where a plurality of coil units 151 are connected in series to form a coil array 150. The light module 180 may illuminate the interior of the oral cavity to perform sterilization or other functions, thereby allowing the cleaning head 120 to perform a better cleaning function. The light emitting module 180 may be directly powered by an ac signal, so that the light emitting module 180 is directly connected to the coil array 150, and the electric energy generated by the coil array 150 directly powers the light emitting module 180, so as to achieve self-sufficiency of power supply inside the cleaning head 120.

Alternatively, referring to fig. 10 and 11, the light emitting module 180 includes a first light emitting diode D6 and a second light emitting diode D7; a first pole of the first light emitting diode D6 is electrically connected to a first output terminal of the coil array 150, and a second pole of the first light emitting diode D6 is electrically connected to a second output terminal of the coil array 150; a first pole of the second light emitting diode D7 is electrically connected to the second output terminal of the coil array 150, and a second pole of the second light emitting diode D7 is electrically connected to the first output terminal of the coil array 150.

Specifically, the first pole of the first light emitting diode D1 is, for example, an anode, and the second pole of the first light emitting diode D1 is a cathode. The first pole of the second light emitting diode D2 is, for example, an anode, and the second pole of the second light emitting diode D2 is a cathode. The alternating current generated by the coil array 150 comprises forward current and reverse current, when the alternating current is forward current, the alternating current can supply power to the first light emitting diode D6, and when the alternating current is reverse current, the alternating current can supply power to the second light emitting diode D7, so that the electric energy generated by the coil array 150 can be fully utilized, the energy waste is avoided, the light emitting module 180 can be ensured to continuously emit light, and a better cleaning effect is achieved.

The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. An electric oral cleaning device, comprising: a handle, a cleaning head and a rotating shaft; the rotating shaft part is positioned in the handle, when the cleaning head is mounted on the handle, the rotating shaft part is positioned in the cleaning head, and the rotating shaft is configured to drive the cleaning head to move when moving;

one end of the handle for mounting the cleaning head is provided with a permanent magnet;

The cleaning head is used for being installed on one end of the handle and is provided with at least one coil array, and the coil array is configured to cut magnetic force lines of the permanent magnet and generate electric energy when the cleaning head moves.

2. The electric oral cleaning apparatus of claim 1, wherein the coil array comprises a plurality of coil units; all the coil units are connected in series or parallel; or part of the coil units are connected in series, and the other part of the coil units are connected in parallel.

3. The electric oral cleaning apparatus of claim 2, wherein the coil unit comprises a multi-turn coil of at least one strand of semiconductor wire.

4. The electric oral cleaning apparatus of claim 1, wherein,

When the cleaning head is mounted on the handle, the distance between the coil array and the permanent magnet is smaller than a preset threshold value.

5. The electric oral cleaning apparatus of claim 1, further comprising an energy storage module;

The energy storage module is positioned inside the cleaning head and connected with the coil array, and the energy storage module is configured to store electric energy generated by the coil array.

6. The electric oral cleaning apparatus of claim 5, wherein the energy storage module comprises a capacitor and/or a battery.

7. The electric oral cleaning apparatus of claim 5, further comprising a rectifying module;

the rectification module is connected between the energy storage module and the coil array.

8. The electric oral cleaning apparatus of claim 7, wherein the rectifying module comprises a full bridge rectifying circuit or a half wave rectifying circuit.

9. The electric oral cleaning apparatus of claim 1, further comprising a light module;

The light emitting module is connected with the coil array, and the light emitting module is configured to emit light according to electric energy generated by the coil array.

10. The electric oral cleaning device of claim 9, wherein the light module comprises a first light emitting diode and a second light emitting diode;

The first pole of the first light-emitting diode is electrically connected with the first output end of the coil array, and the second pole of the first light-emitting diode is electrically connected with the second output end of the coil array;

The first pole of the second light emitting diode is electrically connected with the second output end of the coil array, and the second pole of the second light emitting diode is electrically connected with the first output end of the coil array.