A micro-current brush head and a power toothbrush

Abstract

The utility model provides a kind of micro-current brush head and electric toothbrush, it is related to personal care technical field, it is applied to swing or rotary electric toothbrush, and with the detachable connection of electric toothbrush's brush handle, including brush head main body, the rotating member of being installed in the brush head main body and the swing head of being linked with the rotating member setting, the brush head main body has installation cavity, permanent magnet is configured in the installation cavity, the swing head is connected with the installation cavity, and coil is configured on the swing head, the positive pole and negative pole of the coil are at least partially exposed to the bristle surface of the swing head, when the driving structure of the brush handle drives the rotating member rotation, synchronously drive the swing head swing, to make the coil swing relative to the permanent magnet to cut magnetic induction line, and when the coil and liquid form energized loop, micro-current is released to liquid. To improve the problem that the internal circuit of existing micro-current brush head is long, manufacturing cost is high and is difficult to be applied to aftermarket.

Description

Technical Field

[0001] This utility model relates to the field of personal care technology, and more specifically, to a microcurrent brush head and an electric toothbrush. Background Technology

[0002] Traditional electric toothbrushes mostly use a motor to drive the brush head to vibrate or oscillate for oral cleaning. To enhance the cleaning effect, existing electric toothbrushes have added a microcurrent function to the brush head vibration or oscillation. This utilizes a weak current to alter the oral environment, upgrading cleaning from physical to a "bioelectric" level, achieving more efficient antibacterial and oral health maintenance effects than traditional electric toothbrushes. For example, Chinese patent CN120022098A discloses a microcurrent teeth-strengthening electric toothbrush that replaces the motor's output shaft with a hollow shaft. A specially designed copper pillar is used as the positive electrode through the hollow shaft, and the surface of the motor's output shaft is used as the negative electrode. Two negative electrode plates are added to the brush head for connection, and a special chip on the main unit's PCBA board transmits the microcurrent, thus generating a microcurrent while the toothbrush oscillates at high frequency. In this type of structure, the generation of the microcurrent at the brush head relies on the internal circuitry of the brush handle, resulting in long internal wiring, which is not conducive to assembly and brush head shaping. At the same time, many parts need to be modified, such as motors, PCBAs, and brush heads, which is costly. Moreover, brush heads with microcurrents are difficult to adapt to the previous brush handles and cannot be used in the aftermarket. Utility Model Content

[0003] This utility model discloses a microcurrent brush head, which aims to improve the problems of existing microcurrent brush heads having long internal circuits, high manufacturing costs, and difficulty in being applied to the aftermarket.

[0004] The present invention adopts the following solution:

[0005] A microcurrent brush head is applied to an oscillating or rotary electric toothbrush and is detachably connected to the handle of the oscillating or rotary electric toothbrush. It includes a brush head body, a rotating component installed within the brush head body, and an oscillating head linked to the rotating component. The brush head body has a mounting cavity containing a permanent magnet. The oscillating head is connected to the mounting cavity and has a coil disposed thereon. At least partially, the positive and negative poles of the coil are exposed on the bristle-embedded surface of the oscillating head. When the drive structure of the brush handle drives the rotating component to rotate, it synchronously drives the oscillating head to oscillate, causing the coil to oscillate relative to the permanent magnet to cut magnetic field lines. A microcurrent is released into the liquid when the coil forms an electrical circuit with the liquid.

[0006] As a further improvement, the coil is confined within the mounting slot of the oscillating head, with its positive and negative terminals arranged to pass downwards through mounting holes on the oscillating head from the top of the oscillating head and exposed on the flocked surface.

[0007] As a further improvement, the positive and negative poles of the coil extend no more than 1 mm beyond the flocking surface.

[0008] As a further improvement, the top of the mounting cavity is provided with a through hole for liquid to enter.

[0009] As a further improvement, the swing head is housed in the mounting cavity, and its rotation center is concentric with the opening of the mounting cavity. The side of the swing head is provided with a slot, and one end of the rotating member is inserted into the slot to drive the swing head to swing.

[0010] As a further improvement, a pivot is provided along the center of the opening, and the swing head is provided with a shaft hole for fitting the pivot.

[0011] As a further improvement, one end of the rotating member extends axially to form a socket for connection with the drive structure, and the other end has an eccentrically positioned insertion portion that is inserted into the slot.

[0012] As a further improvement, a limiting groove is formed by recessing the swing head on the other side wall of the slot. A limiting member is embedded in the mounting cavity to cooperate with the limiting groove. The limiting member extends into the limiting groove so that the swing head is limited along the axial direction of the mounting cavity and the swing angle of the swing head is restricted.

[0013] As a further improvement, the limiting member is configured to insert inwardly into the limiting groove from the side wall of the brush head body.

[0014] Another electric toothbrush is provided, including a handle and a brush head detachably connected to the handle, the brush head being a microcurrent brush head as described in any of the preceding claims.

[0015] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0016] 1. The coil of this application does not require connection to other circuit structures. The brush head is placed in the oral cavity, and the body inside the cavity connects the positive and negative terminals of the coil, forming an electrical circuit between the coil and the liquid. When the coil oscillates relative to the permanent magnet, it can release a microcurrent into the liquid. This simplifies the wiring within the brush head body, facilitating its production. Compared to existing technologies, it eliminates the need to change the structure within the brush handle, enabling the microcurrent brush head to be used in the aftermarket, thus reducing costs. Furthermore, since the coil generates current through oscillation without connection to a circuit board or battery, energy consumption is reduced.

[0017] 2. The top of the mounting cavity is provided with a through hole for liquid to enter, so as to ensure that the positive and negative terminals of the coil can contact the liquid to form an electrical circuit during use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of one embodiment of the present utility model;

[0020] Figure 2 and Figure 3 This is a partial structural schematic diagram of one embodiment of the present invention from different perspectives;

[0021] Figures 4 to 6 This is a cross-sectional view of one embodiment of the present invention along different sections;

[0022] Figure 7 and Figure 8 This is a cross-sectional view of the swing head swinging to different angles according to one embodiment of this utility model;

[0023] Figure 9 This is a schematic diagram of the structure of the swing head according to one embodiment of the present invention;

[0024] Figure 10 This is an exploded view of one embodiment of the present invention;

[0025] Figure 11 This is a schematic diagram of the structure of an electric toothbrush according to one embodiment of the present invention;

[0026] Figure 12 This is a cross-sectional view of an electric toothbrush according to one embodiment of the present invention.

[0027] Icons: 1-Brush head body; 11-Mounting cavity; 111-Permanent magnet; 12-Through hole; 13-Spindle; 14-Limiting component;

[0028] 2-Rotating component; 21-Insertion hole; 22-Insertion part; 23-Positioning shaft;

[0029] 3-Oscillating head; 31-Coil; 311-Positive pole; 312-Negative pole; 32-Flocking surface; 33-Assembly groove; 34-Slot; 35-Shaft hole; 36-Limiting groove;

[0030] 4-Brush handle; 41-Drive rod; 42-Circuit board; 43-Motor; 44-Positioning component; 45-Button. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] The terms “top,” “bottom,” “upper,” “lower,” “left,” “right,” “front,” “back,” and similar expressions used in this document are for illustrative purposes only. The terms “first,” “second,” etc., are only used to distinguish different objects and should not be construed as indicating or implying relative importance or the quantity, specific order, or primary or secondary relationship of the indicated technical features. The term “several” means one or more, and “multiple” means two or more, unless otherwise explicitly specified.

[0033] Example

[0034] Combination Figures 1 to 12This embodiment provides a microcurrent brush head for use in oscillating or rotating electric toothbrushes and is detachably connected to the handle 4 of the oscillating or rotating electric toothbrush. It includes a brush head body 1, a rotating component 2 installed in the brush head body 1, and an oscillating head 3 linked to the rotating component 2. The brush head body 1 has a mounting cavity 11, in which a permanent magnet 111 is disposed. The oscillating head 3 is connected to the mounting cavity 11 and a coil 31 is disposed on the oscillating head 3. The positive pole 311 and the negative pole 312 of the coil 31 are at least partially exposed on the bristle-embedded surface 32 of the oscillating head 3. When the driving structure of the handle 4 drives the rotating component 2 to rotate, it synchronously drives the oscillating head 3 to oscillate, so that the coil 31 oscillates relative to the permanent magnet 111 to cut magnetic field lines, and releases a microcurrent into the liquid when the coil 31 forms an electric circuit with the liquid. The drive structure inside an oscillating or rotary electric toothbrush is existing technology and will not be described in detail here. The oscillation of the oscillating head 3 is a high-frequency oscillation, with an oscillation frequency of 2000-4000 times / minute, to ensure that the microcurrent released into the liquid can achieve a cleaning effect. During use, the brush head is placed in the mouth, and the liquid in the mouth connects the positive terminal 311 and the negative terminal 312 of the coil 31, so that the coil 31 and the liquid form an electric circuit. When the coil 31 oscillates relative to the permanent magnet 111, it can release a microcurrent into the liquid. This achieves the generation of a microcurrent while the oscillating head 3 is oscillating and brushing the teeth, thereby enhancing the cleaning effect and improving the user experience.

[0035] It should be noted that in this embodiment, the coil 31 does not need to be connected to other circuit structures, which simplifies the wiring within the brush head body 1 and facilitates its production. Compared to the prior art, there is no need to change the structure within the brush handle 4, enabling the microcurrent brush head to be applied to the aftermarket, thereby reducing costs. Furthermore, since the coil 31 generates current through oscillation without needing to be connected to a circuit board or battery, energy consumption can be reduced.

[0036] In a preferred embodiment, the coil 31 is confined within the mounting groove 33 of the oscillating head 3, with its positive electrode 311 and negative electrode 312 arranged to extend downwards from the top of the oscillating head 3 through mounting holes on the oscillating head 3 and exposed on the flocked surface 32. For example, the coil 31 can be integrally molded with the oscillating head 3 by injection molding to facilitate the fixation of the coil 31 and prevent the positive electrode 311 and negative electrode 312 from loosening. The permanent magnet 111 can be embedded in the side wall of the mounting cavity 11 or fixed by adhesive, without specific limitation. Furthermore, the length of the positive electrode 311 and negative electrode 312 extending out of the flocked surface 32 of the coil 31 is no more than 1 mm to avoid the protruding part of the coil 31 touching teeth or gums and causing discomfort.

[0037] In one embodiment, the top of the mounting cavity 11 is provided with a through hole 12 for liquid to enter, so as to ensure that during use, the positive terminal 311 and the negative terminal 312 of the coil 31 can contact the liquid and form an electrical circuit through the liquid. Preferably, three through holes 12 are arranged in an array along the circumference of the mounting cavity 11, which can further ensure that an electrical circuit is formed between the coil 31 and the liquid while reducing the weight of the brush head body 1.

[0038] Based on the above embodiments, in an optional embodiment of the present invention, the swing head 3 is housed in the mounting cavity 11, and its rotation center is concentrically arranged with the opening of the mounting cavity 11. A slot 34 is provided on the side of the swing head 3, and one end of the rotating member 2 is inserted into the slot 34 to drive the swing head 3 to swing. For example, a rotating shaft 13 is provided along the center of the opening, and the swing head 3 is provided with a shaft hole 35 for fitting with the rotating shaft 13. During installation, the swing head 3 is inserted along the opening, and the shaft hole 35 is fitted onto the rotating shaft 13, so that the swing head 3 swings around the rotating shaft 13.

[0039] Furthermore, one end of the rotating member 2 extends axially to form a socket 21 for connection with the drive structure, and the other end has an eccentrically positioned insertion part 22, which is inserted into the slot 34. The drive structure within the brush handle 4 includes a drive rod 41, which is inserted into the socket 21 to drive the rotating member 2 to rotate within a certain angle, causing the insertion part 22 to drive the oscillating head 3 to reciprocate within a certain angle. A positioning shaft 23 is inserted into one end of the rotating member 2 at the insertion part 22 along the axial direction. This positioning shaft 23 is inserted into the brush head body 1. During use, the brush head body 1 is fixed relative to the brush handle 4. The positioning shaft 23 ensures that the rotating member 2 rotates around the axis of the brush head, preventing the rotating member 2 from wobbling and ensuring the stability of the transmission.

[0040] In another embodiment, a limiting groove 36 is recessed on the opposite side wall of the oscillating head 3 relative to the slot 34. A limiting member 14 is embedded in the mounting cavity 11 to cooperate with the limiting groove 36. The limiting member 14 extends into the limiting groove 36 to limit the oscillating head 3 along the axial direction of the mounting cavity 11 and restrict the oscillation angle of the oscillating head 3. Preferably, the limiting member 14 is configured to be inserted into the limiting groove 36 from the side wall of the brush head body 1. For example, the limiting groove 36 and the slot 34 are integrally formed with the oscillating head 3 to simplify the structure. During installation, the oscillating head 3 is inserted along the opening and fitted with the rotating shaft 13, and then the limiting member 14 is inserted into the limiting groove 36 to realize the installation of the oscillating head 3. During disassembly, the limiting member 14 can be pulled out, which is convenient for disassembly and assembly and facilitates the replacement of the oscillating head 3.

[0041] Reference Figure 11 and Figure 12This utility model also provides an electric toothbrush, including a handle 4 and a brush head detachably connected to the handle 4. The brush head is a microcurrent brush head as described in any of the above embodiments. Exemplarily, the handle 4 has a drive structure, which includes a circuit board 42, a motor 43, a drive rod 41, and a positioning member 44. The motor 43 is electrically connected to the circuit board 42. The circuit board 42 is triggered by a button 45 on the handle 4 to control the start / stop and rotation speed of the motor 43. The positioning member 44 is connected to the output shaft of the motor 43 and is used to limit the rotation angle of the drive rod 41, so that the drive rod 41 rotates back and forth within a limited rotation angle, correspondingly causing the oscillating head 3 to oscillate reciprocally within a limited angle, thereby realizing the oscillation of the oscillating head 3 and the release of microcurrent. The circuit principle between the circuit board 42 and the motor 43 is prior art and will not be described further here.

[0042] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions that fall within the scope of this utility model's concept are protected by this utility model.

Claims

1. A microcurrent brush head, characterized in that, An electric toothbrush, applicable to oscillating or rotary electric toothbrushes and detachably connected to the handle of the toothbrush, includes a brush head body, a rotating component installed within the brush head body, and an oscillating head linked to the rotating component. The brush head body has a mounting cavity containing a permanent magnet. The oscillating head is connected to the mounting cavity and has a coil disposed thereon. At least partially, the positive and negative poles of the coil are exposed on the bristle-embedded surface of the oscillating head. When the drive structure of the brush handle drives the rotating component to rotate, it synchronously drives the oscillating head to oscillate, causing the coil to oscillate relative to the permanent magnet to cut magnetic field lines. A microcurrent is released into the liquid when the coil forms an electrical circuit with the liquid.

2. The microcurrent brush head according to claim 1, characterized in that, The coil is confined within the mounting slot of the oscillating head, with its positive and negative terminals arranged to extend downwards from the top of the oscillating head through mounting holes on the oscillating head and exposed on the flocked surface.

3. The microcurrent brush head according to claim 2, characterized in that, The positive and negative terminals of the coil extend no more than 1 mm beyond the hair-planting surface.

4. The microcurrent brush head according to claim 2, characterized in that, The top of the mounting cavity is provided with a through hole for liquid to enter.

5. The microcurrent brush head according to claim 1, characterized in that, The swing head is housed in the mounting cavity, and its rotation center is concentric with the opening of the mounting cavity. The side of the swing head is provided with a slot, and one end of the rotating component is inserted into the slot to drive the swing head to swing.

6. The microcurrent brush head according to claim 5, characterized in that, A pivot is provided along the center of the opening, and the swing head is provided with a shaft hole for fitting the pivot.

7. The microcurrent brush head according to claim 5, characterized in that, One end of the rotating member extends axially to form a socket for connection with the drive structure, and the other end has an eccentrically positioned insertion portion that is inserted into the slot.

8. The microcurrent brush head according to claim 5, characterized in that, The swing head is recessed into the other side wall of the slot to form a limiting groove. A limiting member is embedded in the mounting cavity to cooperate with the limiting groove. The limiting member extends into the limiting groove so that the swing head is limited along the axial direction of the mounting cavity and the swing angle of the swing head is restricted.

9. The microcurrent brush head according to claim 8, characterized in that, The limiting member is configured to insert inwardly into the limiting groove from the side wall of the brush head body.

10. An electric toothbrush, characterized in that, It includes a brush handle and a brush head detachably connected to the brush handle, wherein the brush head is a microcurrent brush head as described in any one of claims 1-9.

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