Electric toothbrush and its combination structure

Abstract

The present invention relates to an electric toothbrush including: a head unit; and a handle unit detachably combined with the head unit to supply a driving voltage to the head unit according to a control of a user, the handle unit including: an insertion member including a base portion and at least one protrusion portion protruding from the base portion; and a connection terminal, a portion of which protrudes outward from the insertion member to be electrically connected with the head unit when the head unit is combined with the handle unit, the head unit including: a housing member including an introduction portion, an anti-disengagement portion, and an insertion portion, the introduction portion being introduced to a depth at which the insertion member can be inserted, the anti-disengagement portion protruding from an inner wall surface of the introduction portion, the anti-disengagement portion overlapping the protrusion portion with each other if the insertion member is rotated by a predetermined angle in a state in which the insertion member is inserted into the introduction portion, and the insertion portion penetrating a bottom surface of the introduction portion; and an electrode assembly disposed adjacent to the housing member inside the head unit, the electrode assembly being electrically connected with a terminal portion of the connection terminal by penetrating the insertion portion when the handle unit is combined with the head unit.

Description

Technical Field

[0001] This invention relates to electric toothbrushes and their connecting structures, and more specifically, to electric toothbrushes capable of effectively removing dental plaque and their connecting structures. Background Technology

[0002] Dental plaque is a sticky, transparent film that adheres to the surface of teeth. It is formed by the adhesion of numerous bacteria living in the mouth and specific components of saliva. Dental plaque forms on teeth, around teeth, in dental prostheses, around orthodontic appliances, and on dentures.

[0003] If plaque forms a very thin and transparent film, bacteria within it will multiply. Utilizing the sugars provided by ingested food, the bacteria in the plaque will increase exponentially in number. The acidic substances produced by the bacteria in the plaque dissolve the calcareous components of teeth, leading to cavities, and the toxins can cause gingivitis.

[0004] Dental plaque is not visible to the naked eye and mainly forms in large quantities in the deep bone of the teeth, between teeth, and in the narrow gaps between teeth and gums. In these confined spaces, it affects the teeth and surrounding tissues; therefore, removing plaque from every nook and cranny is extremely important, and it is difficult to effectively remove this plaque using only a regular toothbrush. Summary of the Invention

[0005] The present invention, proposed to solve the above problems, aims to provide an electric toothbrush and its combined structure that allows for the replacement of the toothbrush head containing the bristles.

[0006] Furthermore, another object of the present invention is to provide an electric toothbrush and its combined structure that can prevent tooth decay and periodontal disease by removing dental plaque.

[0007] The electric toothbrush of this invention may include: a head unit; and a handle unit, which is detachably connected to the head unit and supplies driving voltage to the head unit according to the user's control. The handle unit includes: an insertion member, including a base portion and at least one protrusion protruding from the base portion; and a plurality of connecting terminals, a portion of which protrudes outward from the insertion member and is electrically connected to the head unit when the head unit is connected to the handle unit. The head unit includes: a receiving member, including an introduction portion, an anti-detachment portion, and a plurality of insertion portions, wherein the introduction portion is inserted to a depth into which the insertion member can be inserted, the anti-detachment portion protrudes from the inner wall surface of the introduction portion, and if the insertion member is rotated by a predetermined angle while inserted into the introduction portion, the anti-detachment portion overlaps with the protrusion, and the insertion portions penetrate the bottom surface of the introduction portion; and an electrode assembly disposed adjacent to the receiving member inside the head unit, which, when the handle unit is connected to the head unit, electrically connects to the end portions of the plurality of connecting terminals located inside the head unit through the plurality of insertion portions.

[0008] Furthermore, the aforementioned handle unit may include: a handle cover, which is combined with the aforementioned insertion member; a battery, which is disposed on the aforementioned handle cover; a main circuit board, which is equipped with a signal supply unit that generates a drive voltage using the voltage of the aforementioned battery; and a connection module, which includes a contact block formed of a non-conductive material and contact terminals formed of a conductive material and surrounding the aforementioned contact block, wherein one side of the aforementioned contact terminals contacts the aforementioned main circuit board, and the other side contacts a plurality of the aforementioned connection terminals respectively.

[0009] Furthermore, the aforementioned head unit may include: a head cover, including a head with an opening on one side and a connecting portion communicating with the head; an auxiliary circuit board disposed inside the head cover; a head cap, closing the opening portion of the head; toothbrush bristles, attached to the head cap; and a first electrode and a second electrode, located in the auxiliary circuit board at positions corresponding to the head, for generating an electric field, wherein the electrode assembly is disposed adjacent to the portion in the connecting portion that is attached to the handle unit, and is attached to the auxiliary circuit board.

[0010] Furthermore, the electrode assembly may include: an insulating component formed of a non-conductive material, having a through hole for inserting a portion of the auxiliary circuit board; and a conductive component formed of a conductive material, having one side disposed in the portion of the insulating component with the through hole and electrically connected to the auxiliary circuit board, and the other side disposed adjacent to the receiving component, and electrically connected to a plurality of the connection terminals when the handle unit is combined with the head unit.

[0011] Furthermore, the conductive component may include: a gripping portion for gripping the portion of the insulating component in which the through hole is formed; a pressure-applying portion formed in a bent or folded manner on the portion of the gripping portion that contacts the auxiliary circuit board for applying pressure to the auxiliary circuit board; and a contact portion extending from the gripping portion and contacting the connection terminal.

[0012] Furthermore, the end portion of the contact portion can be separated from the insulating component, and the middle portion of the contact portion protrudes toward the plurality of connection terminals.

[0013] Furthermore, at least one rod-shaped extension can be formed on the aforementioned auxiliary circuit board to allow it to be inserted into the through hole of the aforementioned insulating component.

[0014] Furthermore, the first electrode and the second electrode can be spaced apart from each other along the length of the auxiliary circuit board.

[0015] Furthermore, the aforementioned head unit may also include a light-emitting device disposed on the aforementioned auxiliary circuit board and used to irradiate light to the outside.

[0016] Furthermore, the aforementioned head cover can be made of a transparent material.

[0017] Furthermore, the aforementioned handle unit may also include a sealing component, which is located in the handle cover at the portion that contacts the head unit and is used to seal between the handle cover and the head unit.

[0018] Furthermore, the plurality of the aforementioned connection terminals may include: a first connection terminal; and at least one second connection terminal, which is spaced apart from the first connection terminal.

[0019] Furthermore, the plurality of the aforementioned insertion portions may include: a first insertion portion, penetrating the bottom surface of the aforementioned inlet portion, for enabling the aforementioned first connecting terminal to be electrically connected to the aforementioned electrode assembly; and at least one second insertion portion, penetrating the bottom surface of the aforementioned inlet portion, for enabling the aforementioned second connecting terminal to be electrically connected to the aforementioned electrode assembly, and being arc-shaped so that when the aforementioned handle unit and the aforementioned head unit are rotated relative to each other while the aforementioned second connecting terminal is inserted, the aforementioned second connecting terminal can be moved from one end to the other end.

[0020] Furthermore, the second insertion portion may include: a first region, in which at least one of the second connecting terminals is located when the insertion member is inserted into the inlet portion of the receiving member; a second region, facing the intermediate portion protruding from the contact portion toward the plurality of connecting terminals, in which at least one of the second connecting terminals moves from the first region and eventually is located in the second region when the insertion member is inserted into the inlet portion of the receiving member and rotates by a predetermined angle; and a positioning protrusion, protruding from a portion of the portion in which the second region is located in the second insertion portion, which can disengage the second connecting terminal from the second region when an external force of a threshold or higher is applied while the second connecting terminal is located in the second region, and keeps the second connecting terminal in the second region when no external force of a threshold or higher is applied.

[0021] The electric toothbrush assembly structure of this invention includes a head unit and a handle unit that can be detached from each other. The handle unit includes: an insertion member having multiple protrusions; and a first connecting terminal and a pair of second connecting terminals exposed to the outside through the insertion member. The head unit includes a receiving member located at the assembly portion with the handle unit. The receiving member includes: multiple anti-detachment portions; a first insertion portion located at the center, into which the first connecting terminals are inserted; and a pair of second insertion portions symmetrical about the first insertion portion, having a first region and a second region. The pair of second connecting terminals can be located in the first region and the second region. In the initial state where the insertion member is inserted into the receiving member, the second connecting terminals are located in the first region. Subsequently, when the handle unit rotates relative to the head unit, the second connecting terminals located in the first region move towards the second region, and the protrusions are respectively inserted into the inner side of the anti-detachment portions.

[0022] According to the present invention described above, the present invention provides an electric toothbrush in which the head unit can be detached from the handle unit and easily replaced with a new head unit when the head unit needs to be replaced.

[0023] Moreover, the present invention can provide an electric toothbrush that can effectively remove dental plaque.

[0024] Furthermore, according to the present invention, an electric toothbrush is provided that can prevent tooth decay and periodontal disease by removing dental plaque.

[0025] Furthermore, according to the present invention, the present invention can provide an electric toothbrush that can stably maintain the engagement state of the handle unit and the head unit.

[0026] Furthermore, according to the present invention, an electric toothbrush can be provided that can prevent water from flowing in from the outside. Attached Figure Description

[0027] Figure 1 This is a perspective view of an electric toothbrush according to an embodiment of the present invention.

[0028] Figure 2 This is a perspective view showing the combined state of the head unit and handle unit included in the electric toothbrush of an embodiment of the present invention.

[0029] Figure 3 To show Figure 1 The image shows a 3D view of the electric toothbrush in its detached state.

[0030] Figure 4 To observe from above Figure 3 A diagram of the handle unit.

[0031] Figure 5 In order to be in Figure 3 A sectional view taken along line AA in the handle unit.

[0032] Figure 6 From Figure 3 An exploded perspective view showing the insertion component, main circuit board, connection terminal, and connection module selected from the handle unit.

[0033] Figure 7 From Figure 3 The diagram is shown by selecting the head unit.

[0034] Figure 8 In order to be in Figure 5 A sectional view taken along line BB in the head unit.

[0035] Figure 9 To show Figure 5 An exploded 3D view of the head unit.

[0036] Figure 10 To observe from the Z direction Figure 5 The diagram of the head unit.

[0037] Figure 11 This diagram illustrates the process of joining the insert component and the receiving component.

[0038] Figure 12 From Figure 9 The figure shows an electrode assembly selected from the head unit.

[0039] Figure 13 In order to be in Figure 12 A cross-sectional view taken along the CC line in the electrode assembly.

[0040] Figure 14 This is a front view of an electric toothbrush according to an embodiment of the present invention.

[0041] Figure 15This diagram illustrates the signal supply section mounted on the main circuit board.

[0042] Figures 16 to 18 A diagram illustrating the waveform of a signal according to an embodiment of the present invention.

[0043] Figure 19 and Figure 20 This is a diagram illustrating the biofilm removal effect of a driving signal composed of a mixture of AC and DC signals.

[0044] Figure 21 and Figure 22 The diagram illustrates a modified example of the signal supply unit.

[0045] Figure 23 A perspective view illustrating an example of the use of an electric toothbrush according to an embodiment of the present invention. Detailed Implementation

[0046] Hereinafter, embodiments relating to the present invention are illustrated in the figures and described in detail. However, it should be understood that the present invention is not limited to the embodiments disclosed below, but can be embodied in many different forms, and includes all modifications, equivalent technical solutions or alternative technical solutions within the scope of the present invention's ideas and technology.

[0047] In describing the structural elements of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are only used to distinguish between two structural elements, and the nature, sequence, or order of the corresponding structural elements is not limited to the aforementioned terms. Furthermore, in this specification, when a structural element is "connected," "joined," or "linked" with other structural elements, it can be a direct connection or link between the structural elements, or it can be a connection, joint, or link between various structural elements. In the case of "connection," "joined," or "linking," it can be a physical connection, joint, or link; if necessary, it can also be an electrical connection, joint, or link.

[0048] Hereinafter, an electric toothbrush according to an embodiment of the present invention will be described with reference to the accompanying drawings relating to the embodiments of the present invention.

[0049] Figure 1 To illustrate a perspective view of an electric toothbrush according to an embodiment of the present invention, Figure 2 This is a perspective view showing the combined state of the head unit and handle unit included in the electric toothbrush of an embodiment of the present invention.

[0050] Reference Figure 1 and Figure 2 The electric toothbrush 1 of this embodiment may include a head unit 100 and a handle unit 200.

[0051] At least a portion of the head unit 100 can be inserted into the user's mouth to remove dental plaque. The head unit 100 can be detachably attached to the handle unit 200, which will be described later. Therefore, if the head unit 100 needs to be replaced due to aging or other reasons, the user can easily replace the existing head unit 100 with a new one. A detailed description of the head unit 100 will be provided later.

[0052] The handle unit 200, serving as the main body of the electric toothbrush 1, can be designed to be held by the user during use. This handle unit 200 can be detachably attached to the head unit 100, supplying driving voltage to the head unit 100 according to the user's control. Furthermore, after a portion of the handle unit 200 is inserted into the head unit 100, it can be electrically connected to and mechanically secured to the head unit 100 when rotated relative to it.

[0053] More in detail, such as Figure 2 As shown, with the handle unit 200 and the head unit 100 side by side, the user moves the handle unit 200 in a first direction to insert the end portion of the handle unit 200 into the head unit 100. If the handle unit 200 is rotated in a second direction, the head unit 100 and the handle unit 200 can be combined. The process of separating the handle unit 200 from the head unit 100 can be performed in the reverse order of the above-described fastening process.

[0054] In contrast, for an electric toothbrush where the handle unit 200 and head unit 100 are integrated, if the bristles 160 of the head unit 100 are damaged due to repeated use, the entire electric toothbrush needs to be replaced. However, for the electric toothbrush 1 of this embodiment, if the bristles 160 of the head unit 100 are damaged due to repeated use, the existing head unit 100 is separated from the handle unit 200, and a new head unit 100 is attached to the handle unit 200 for use.

[0055] Hereinafter, with reference to the accompanying drawings, a detailed description will be provided of the handle unit 200 and head unit 100 included in an electric toothbrush 1 according to an embodiment of the present invention.

[0056] Figure 3 To show Figure 1 The image shown is a 3D view of the electric toothbrush in its detached state. Figure 4 To observe from above Figure 3 A diagram of the handle unit. Figure 5 In order to be in Figure 3 A cross-sectional view taken along line AA in the handle unit. Figure 6 From Figure 3 An exploded perspective view showing the insertion component, main circuit board, connection terminal, and connection module selected from the handle unit.

[0057] Reference Figures 3 to 6 As an example, the aforementioned handle unit 200 may include an insertion part 210, a handle cover 220, a battery 230, a main circuit board 240, an operating part 250, a connection terminal 260, and a connection module 280.

[0058] When the handle unit 200 is engaged with the head unit 100, the insertion member 210 can be inserted into the head unit 100. For this purpose, as an example, the insertion member 210 may include a base portion 211 and a protrusion 212.

[0059] The base portion 211 may be cylindrical. For example, the base portion 211 may be cylindrical. The connecting terminal 260, described later, may protrude outward through the base portion 211.

[0060] The protrusion 212 includes at least one plate-shaped protrusion 212 that protrudes from the protruding surface of the base portion 211. The protrusion 212 can protrude from the upper protruding surface of the base portion 211. When the handle unit 200 is engaged with the head unit 100, the protrusion 212 can be hooked onto a portion of the head unit 100 to engage the head unit 100 with the handle unit 200. This will be explained in detail in the description of the head unit 100.

[0061] The handle cover 220 can be combined with the aforementioned insertion part 210. The handle cover 220 can accommodate the battery 230, the main circuit board 240 and the connection terminal 260 and protect them from external contact.

[0062] The battery 230 may be installed in the handle cover 220 and can supply power to the main circuit board 240 described later. A separate sealing component 270 for replacing the battery 230 and the like may be provided in the handle cover 220, but it is not limited thereto.

[0063] As an example, this battery 230 can be a primary battery or a secondary battery. When the battery 230 is a primary battery, the user can replace the battery 230 periodically. When the battery 230 is a secondary battery, it can be charged through various charging methods.

[0064] For example, the battery 230 can be charged wirelessly or via wired charging, and can be detached from the handle cover 220 and charged via an additional charging device.

[0065] The main circuit board 240 can provide a drive voltage. Therefore, a signal supply unit SG1 (see reference 230) that generates the drive voltage using the voltage of the battery 230 can be installed on the main circuit board 240. Figure 15 Therefore, a detailed description of the main circuit board 240 will be provided later.

[0066] The operating component 250 can control the power supply from the battery 230 to the main circuit board 240. The operating component 250 may be located in a part of the handle cover 220.

[0067] As an example, the operating component 250 can be a button or a touch sensor. If the operating component 250 is a button, a switch 241 for detecting the pressing of the operating component 250 can be installed on the main circuit board 240. If a user presses the operating component 250, the switch 241 can detect the pressing and control the electric toothbrush 1 to be on / off.

[0068] When the user rinses their mouth, they can press the operating component 250 to turn on the power of the electric toothbrush 1. As a result, the driving voltage generated from the handle unit 200 is supplied to the first electrode 110 and / or the second electrode 120 of the head unit 100 to generate an electric field for removing dental plaque.

[0069] The connection terminal 260 is electrically connected to the main circuit board 240. A portion of the connection terminal 260 protrudes outward from the insertion member 210. That is, with Figure 5 Based on the indicated direction, the lower end of the connecting terminal 260 can be electrically connected to the main circuit board 240 and can pass through the insertion component 210.

[0070] The connection terminal 260 can be directly connected to the main circuit board 240, or indirectly connected to the main circuit board 240 through the connection module 280 described later. A detailed description of the connection module 280 will be provided later. However, the connection method between the connection terminal 260 and the main circuit board 240 can be varied and is not limited to a specific method.

[0071] When the head unit 100 and the handle unit 200 are combined, the connection terminal 260 can be electrically connected to the head unit 100, so that the driving voltage of the main circuit board 240 is transmitted to the head unit 100.

[0072] There may be one or more connection terminals 260. In the case of multiple connection terminals 260, as an example, the multiple connection terminals 260 may include a first connection terminal 261 and at least one second connection terminal 262 disposed spaced apart from the first connection terminal 261.

[0073] There can be two second connecting terminals 262. In this case, the two second connecting terminals 262A and 262B can be symmetrically arranged with respect to the first connecting terminal 261. The number of connecting terminals 260 can be changed according to the design of the electric toothbrush 1 and is not limited to a specific number.

[0074] On the other hand, the aforementioned connecting terminal 260 can be formed of a conductive material such as metal, and can be in the shape of a rod or bar with a specified length. Moreover, as an example, the material of the insertion member 210 can be formed of an insulating material such as non-conductive plastic, so as to prevent the first connecting terminal 261 from being energized with the plurality of second connecting terminals 262.

[0075] The connection module 280 is used to electrically connect the main circuit board 240 to the plurality of connection terminals 260. For this purpose, the connection module 280 may include a contact block 281 and at least one contact terminal 282.

[0076] The contact block 281 is formed of a non-conductive material. A portion of the contact block 281 may be coupled to the main circuit board 240 described above, while another portion may be disposed adjacent to the ends of the plurality of connection terminals 260 described above. As an example, the shape of this contact block 281 may be the same as that of the insulating component 171 included in the electrode assembly 170 described later, but is not limited thereto.

[0077] The contact terminal 282 is formed of conductive material and surrounds the contact block 281. One side is in contact with the main circuit board 240, and the other side is in contact with the connection terminal 260.

[0078] The contact terminal 282 can be formed of an elastically deformable material, such as a leaf spring. This improves the bonding force with the contact block 281 and enhances the contact stability when in contact with the connecting terminal 260.

[0079] On the other hand, the number of contact terminals 282 can correspond to the number of connection terminals 260. For example, if there are three connection terminals 260, there can also be three contact terminals 282, and the connection terminals 260 and contact terminals 282 can make contact in a one-to-one correspondence. As an example, the shape of such contact terminals 282 can be the same as that of the conductive components 172 included in the electrode assembly 170 described later, but is not limited thereto.

[0080] The main circuit board 240 and the connection terminal 260 can maintain a stable electrical connection through the aforementioned connection module 280.

[0081] On the other hand, the aforementioned handle unit 200 may also include a sealing component 290.

[0082] The sealing member 290 is located in the portion of the handle cover 220 that contacts the head unit 100, and seals the area between the handle cover 220 and the head unit 100. For this purpose, the sealing member 290 may be annular in shape and made of rubber or silicone. The sealing member 290 may be inserted into a portion of the handle cover 220. For example, the sealing member 290 may be located in the portion of the handle cover 220 adjacent to the insertion member 210.

[0083] During the use of the electric toothbrush 1, saliva or toothpaste may leak from the head unit. The sealing component 290 prevents the head unit 100 or handle unit 200 from being damaged by moisture by preventing substances such as saliva or toothpaste from flowing in between the handle cover 220 and the head unit 100.

[0084] Figure 7 From Figure 3 The diagram is shown by selecting the head unit. Figure 8 In order to be in Figure 5 A sectional view taken along line BB in the head unit. Figure 9 To show Figure 5 Exploded stereoscopic view of the head unit. Figure 10 To observe from the Z direction Figure 5 The diagram of the head unit, Figure 11 This diagram illustrates the process of joining the insert component and the receiving component.

[0085] Reference Figures 7 to 11 As an example, the head unit 100 may include a head cover 130, an auxiliary circuit board 140, a first electrode 110, a second electrode 120, a head cover 150, toothbrush bristles 160, an electrode assembly 170, and a housing component 180.

[0086] The head cover 130 may include a head 131 with an opening on one side and a connecting portion 132 communicating with the head 131. The head 131 and the connecting portion 132 may be integrally formed.

[0087] The connecting part 132 can be connected to the handle unit 200, and the head cover 150, toothbrush bristles 160, first electrode 110, and second electrode 120, which will be described later, can be provided on the head 131.

[0088] An auxiliary circuit board 140 may be disposed inside the head cover 130. The auxiliary circuit board 140 may have at least one rod-shaped extension 141 formed in such a way that it can be inserted into the through hole 171a of the insulating member 171.

[0089] The number of extensions 141 may correspond to the number of connection terminals 260. For example, in the case where the connection terminals 260 include one first connection terminal 261 and two second connection terminals 262, there may be three extensions 141. Conductive wires (not shown) may be formed in each extension 141, and each conductive wire may be electrically connected to the connection terminal 260 via the electrode assembly 170 described later.

[0090] The head cover 150 can close the opening portion of the head 131. For this purpose, the head cover 150 can be shaped to correspond to the opening portion in the head 131.

[0091] Toothbrush bristles 160 can be attached to the head cover 150. The toothbrush bristles 160 can be inserted into multiple bristle holes (not shown) formed on the outer surface of the head cover 150 for fixation. The configuration, number, size, etc. of these toothbrush bristles 160 are not particularly limited and can be varied in various forms.

[0092] The first electrode 110 and the second electrode 120 may be located in the auxiliary circuit board 140 at the portion corresponding to the head 131 and generate an electric field. The first electrode 110 and the second electrode 120 may be mounted on the auxiliary circuit board 140.

[0093] The first electrode 110 and the second electrode 120 can receive electrical energy from the handle unit 200 to generate an electric field. This electric field can weaken the structure of dental plaque, so that the user can effectively remove dental plaque from the oral cavity using the electric toothbrush 1 of the present invention.

[0094] Therefore, the first electrode 110 and the second electrode 120 can be formed of materials such as brass, aluminum, conductive polymer, conductive silicon, and stainless steel, but are not limited to these. Any material that is conductive can be used as an electrode material.

[0095] The first electrode 110 and the second electrode 120 can be configured as a positive electrode and a negative electrode, respectively. The first electrode 110 and the second electrode 120 can be formed at a height that allows them to protrude outward from the head cover 150. The height of the first electrode 110 and the second electrode 120 can be varied according to the design of the electric toothbrush 1, and is therefore not limited to a specific value.

[0096] The electrode assembly 170 is disposed adjacent to the receiving member 180 inside the head unit 100. When the handle unit 200 is combined with the head unit 100, it can pass through the plurality of insertion portions 184, 185 to electrically connect with the ends of the plurality of connection terminals 260 located inside the head unit 100. For this purpose, the electrode assembly 170 can be disposed adjacent to the portion of the connecting portion 132 adjacent to the handle unit 200 and combined with the auxiliary circuit board 140.

[0097] That is, the auxiliary circuit board 140 can receive the driving voltage transmitted from the handle unit 200 from the electrode assembly 170 to transmit the voltage to the first electrode 110 and the second electrode 120 described above. A detailed description of the electrode assembly 170 will follow later.

[0098] The receiving component 180 may be disposed adjacent to the electrode assembly 170 and may be coupled to the end portion of the coupling portion 132 that is coupled to the handle unit 200. The receiving component 180 may be fastened to the electrode assembly 170 or the head cover 130 by an additional bolt 186. When the handle unit 200 is coupled to the head unit 100, the receiving component 180 may be mechanically fastened to the handle unit 200.

[0099] Furthermore, the housing member 180 allows a portion of the electrode assembly 170 to be exposed to the outside. Thus, the aforementioned connection terminal 260 can penetrate the housing member 180 to contact the electrode assembly 170, as will be described in detail later.

[0100] On the other hand, as an example, the aforementioned receiving component 180 may include an introduction portion 181, an anti-detachment portion 182, and a plurality of insertion portions 184 and 185.

[0101] The insertion part 181 may be shaped to be inserted to the depth to which the insertion member 210 can be inserted.

[0102] The anti-detachment part 182 may be plate-shaped and protrude from the inner wall of the inlet part 181. If the insertion member 210 is inserted into the inlet part 181 and rotated by a predetermined angle, it will be located outside the protrusion 212 and overlap with the protrusion 212.

[0103] Multiple insertion portions 184 and 185 can penetrate the bottom surface of the aforementioned inlet portion 181. When multiple connection terminals 260 are inserted, and the handle unit 200 and the head unit 100 rotate relative to each other, they can be mechanically fastened to the multiple connection terminals 260. Through the combination of the multiple insertion portions 184 and 185 and the multiple connection terminals 260, the head unit 100 and the handle unit 200 can be mechanically coupled to each other.

[0104] On the other hand, the housing component 180 may also include a support portion 183.

[0105] The support portion 183 protrudes from the inner wall surface of the aforementioned inlet portion 181. The support portion 183 can support the surrounding surface of the base portion 211 to increase the fixing force on the base portion 211. Furthermore, during the movement of the handle unit 200 toward the head unit 100 along the first direction (refer to...), Figure 2 The support portion 183 allows the protrusion 212 of the insertion member 210 to be inserted into the M region of the introduction portion 181, and prevents it from being inserted into other regions.

[0106] On the other hand, the head unit 100 may also include a light-emitting device 190.

[0107] The light-emitting device 190 can be disposed on the auxiliary circuit board 140 for illuminating light to the outside.

[0108] In this case, the head cover 150 included in the head unit 100 can be formed of a transparent material. For example, the head cover 150 can be made of polycarbonate or a light-diffusing acrylic sheet. The outer surface of this head cover 150 can be formed with fine protrusions to easily diffuse light. Furthermore, the head cover 130 can also be formed of a transparent material so that the head unit 100 emits light when the electric toothbrush 1 is in operation.

[0109] On the other hand, one of the three connection terminals 260 can be connected to the ground terminal of the main circuit board 240, another can receive a driving voltage from the main circuit board 240 to generate an electric field, and the remaining one can receive power from the main circuit board 240 to drive the light-emitting device 190. For example, one of the two second connection terminals 262 is connected to the ground terminal of the main circuit board 240, and the remaining one can receive the aforementioned driving voltage from the main circuit board 240. Furthermore, the first connection terminal 261 can receive power from the main circuit board 240 to transmit it to the light-emitting device 190.

[0110] On the other hand, as described above, the receiving member 180 allows the connection terminal 260 included in the handle unit 200 to pass through, thereby electrically connecting to the head unit 100. To this end, the receiving member 180 will be described in further detail; the receiving member 180 may include a first insertion portion 184 and a second insertion portion 185.

[0111] The first insertion portion 184 can penetrate the bottom surface of the aforementioned introduction portion 181, and the aforementioned first connection terminal 261 is electrically connected to the aforementioned electrode assembly 170.

[0112] The second insertion portion 185 may penetrate the bottom surface of the aforementioned inlet portion 181. The second insertion portion 185 may be arc-shaped, so that when the handle unit 200 and the head unit 100 are rotated relative to each other while the second connecting terminal 262 is inserted, the second connecting terminal 262 can be moved from one end to the other. More specifically, the shape of the second insertion portion 185 may be formed with a radius of curvature corresponding to the movement trajectory of the second connecting terminal 262, and may be formed with a width greater than the diameter of the second connecting terminal 262. This second insertion portion 185 allows the second connecting terminal 262 to be electrically connected to the electrode assembly 170.

[0113] There can be one or more second insertion portions 185. When there are two second connecting terminals 262, there can also be two second insertion portions 185. The two second insertion portions 185 can be symmetrical about the first insertion portion 184. When the handle unit 200 is combined with the head unit 100, the two second connecting terminals 262 can respectively penetrate the two second insertion portions 185 to contact the electrode assembly 170. Furthermore, the first connecting terminal 261 can penetrate the first insertion portion 184 to contact the electrode assembly 170.

[0114] The following describes the process of inserting the insertion member 210 into the aforementioned receiving member 180 to combine the handle unit 200 with the head unit 100.

[0115] First, go back Figure 2 With the handle unit 200 and the head unit 100 side by side, the user moves the handle unit 200 in the first direction to insert the end portion of the handle unit 200 into the head unit 100.

[0116] On the other hand, refer to Figure 10 The second insertion portion 185 may include a first region 185a, a second region 185b, and a positioning protrusion 185c.

[0117] The first region 185a is the region where at least one of the second connecting terminals 260 is located when the insertion member 210 is inserted into the inlet portion 181 of the receiving member 180. Moreover, as described above, the protrusion 212 of the insertion member 210 cannot be inserted into other regions of the receiving member 180 due to the support portion 183, but is instead inserted into region M, which is the insertion target region. Therefore, the second connecting terminal 262 can be located in the first region 185a of the second insertion portion 185.

[0118] When the insertion member 210 is inserted into the inlet portion 181 of the receiving member 180 and rotated by a predetermined angle, such as Figure 11 As shown, the second region 185b is the region where at least one of the aforementioned second connection terminals 260 moves from the first region 185a and eventually resides. Furthermore, the second region 185b faces the intermediate portion protruding from the contact portion 172c toward the plurality of connection terminals 260.

[0119] Therefore, when the second connection terminal 260 is located in the second region 185b, pressure is applied to the middle portion protruding from the contact portion 172c, causing the contact portion 172c to elastically deform and maintain a state of strong contact with the second connection terminal 260.

[0120] The positioning protrusion 185c protrudes from a portion of the second insertion portion 185 where the second region 185b is located. When an external force exceeding a threshold is applied while the second connecting terminal 262 is located in the second region 185b, the second connecting terminal 260 can detach from the second region 185b. When no external force exceeding the threshold is applied, the second connecting terminal 262 can remain located in the second region 185b. Through the positioning protrusion 185c, the engagement between the second connecting terminal 262 and the receiving member 180 can be stably maintained.

[0121] Next, when the user rotates in the second direction (clockwise) (refer to...) Figure 2 When the handle unit 200 is in operation, the head unit 100 can rotate counterclockwise relative to the handle unit 200.

[0122] If the insertion member 210 is rotated and the second connecting terminal 262 is located in the second region 185b of the second insertion portion 185, the insertion member 210 can stop rotating. In this case, the protrusion 212 can be inserted into the inside of the anti-disengagement portion 182, so that the anti-disengagement portion 182 and the protrusion 212 can overlap each other. That is, the protrusions 212 located on both sides of the insertion member 210 are respectively inserted and coupled into the inside of the anti-disengagement portion 182 of the corresponding receiving member 180, so that even if the user pulls the handle unit 200 and the head unit 100 in the length direction respectively, they will not separate.

[0123] Figure 12 From Figure 9 The figure shows an electrode assembly selected from the head unit. Figure 13 In order to be in Figure 12 A cross-sectional view taken along the CC line in the electrode assembly.

[0124] Reference Figure 12 and Figure 13 As an example, the electrode assembly 170 described above may include an insulating component 171 and a conductive component 172.

[0125] The insulating component 171 may be formed of a non-conductive material and has a through hole 171a for inserting a portion of the auxiliary circuit board 140.

[0126] The conductive component 172 can be formed of a conductive material. One side is disposed in the portion of the insulating component 171 where a through hole 171a is formed. It is electrically connected to the auxiliary circuit board 140 through an extension 141 inserted into the through hole 171a. The other side is adjacent to the receiving component 180. When the handle unit 200 and the head unit 100 are combined, it is electrically connected to a plurality of the connection terminals 260. There can be more than one conductive component 172.

[0127] When there are multiple conductive components 172, the multiple conductive components 172 can be arranged spaced apart from each other. As an example, the conductive component 172 can be in the shape of a strip and can be bent multiple times.

[0128] The conductive component 172 can be formed of an elastically deformable material, such as a leaf spring. This improves the bonding force with the insulating component 171 and enhances contact stability when in contact with the connection terminal 260.

[0129] The number of conductive parts 172 can correspond to the number of connecting terminals 260. For example, if there are 3 connecting terminals 260, there can also be 3 conductive parts 172, and the connecting terminals 260 and conductive parts 172 can make one-to-one contact.

[0130] On the other hand, a spacer 171c and a locking portion 171b may be formed in the insulating member 171 to prevent adjacent conductive members 172 from contacting each other. The spacer 171c is formed to protrude between adjacent conductive members 172 on the outer surface of the insulating member 171. When the conductive member 172 is engaged with the insulating member 171, the locking portion 171b can be inserted into the mounting hole H formed in the conductive member 172.

[0131] The conductive component 172 can be continuously maintained in its initial position by the aforementioned separation portion 171c and locking portion 171b.

[0132] As an example, such a conductive component 172 may include a holding portion 172a, a pressing portion 172b, and a contact portion 172c.

[0133] The gripping portion 172a can grip the portion of the insulating member 171 in which the through hole 171a is formed. For this purpose, as an example, the shape of the gripping portion 172a can be similar to the letter "U," but it is not limited to this. Furthermore, the aforementioned hole H can pass through the gripping portion 172a.

[0134] The pressure-applying portion 172b is formed in a bent or folded manner on the portion of the gripping portion 172a that contacts the auxiliary circuit board 140, thereby applying pressure to the auxiliary circuit board 140. For this purpose, the shape of the pressure-applying portion 172b can be arc-shaped, and it can be formed in the portion of the gripping portion 172a where the through hole 171a is provided.

[0135] During the assembly of the head unit 100, a portion of the auxiliary circuit board 140 (e.g., extension 141) can be inserted into the through hole 171a of the insulating member 171, and the pressure-applying portion 172b can apply pressure to the auxiliary circuit board 140. Thus, the pressure-applying portion 172b can be electrically connected to the electrode pattern (not shown) formed on the auxiliary circuit board 140. That is, the pressure-applying portion 172b can improve the bonding force between the auxiliary circuit board 140 and the electrode assembly 170, and furthermore, it can electrically connect the auxiliary circuit board 140 to the conductive member 172.

[0136] A contact portion 172c extends from the grip portion 172a and can contact the connection terminal 260. The end portion of this contact portion 172c is separated from the insulating member 171 in an unsecured state. When the handle unit 200 and the head unit 100 are engaged, even if the connection terminal 260 applies pressure to the contact portion 172c, deformation of a portion of the contact portion 172c and the load generated on the connection terminal 260 can be reduced. Furthermore, when the handle unit 200 and the head unit 100 are engaged, stable contact between the connection terminal 260 and the conductive member 172 can be maintained.

[0137] Furthermore, the middle portion of the aforementioned contact portion 172c may protrude toward the plurality of aforementioned connection terminals 260. As a result, when the handle unit 200 is engaged with the head unit 100, the contact portion 172c undergoes elastic deformation and generates elastic force, thereby further improving the contact reliability between the connection terminals 260 and the contact portion 172c.

[0138] As described above, the head unit 100 does not use wires for electrical connections between the first electrode 110, the second electrode 120, and the electrode assembly 170; the auxiliary circuit board 140 and the electrode assembly 170 can be directly fastened together. Therefore, during the assembly of the head unit 100, the assembly process can be performed more easily without requiring workers to place wires inside the head unit 100.

[0139] Furthermore, unlike the above, when multiple components are connected by wires, the electric toothbrush may stop working due to a short circuit at the connection point between the wire and the component or a short circuit inside the wire. However, in the head unit 100 included in the electric toothbrush 1 of this embodiment, the auxiliary circuit board 140 and the electrode assembly 170 are mechanically fastened to each other, thereby preventing the above-mentioned problems from occurring in advance.

[0140] Figure 14 This is a front view of an electric toothbrush according to an embodiment of the present invention.

[0141] Reference Figure 14In the head unit 100 described above, the first electrode 110 and the second electrode 120 are spaced apart from each other along the length of the auxiliary circuit board 140. That is, with the direction shown in the figure as a reference, the first electrode 110 and the second electrode 120 can be arranged side by side on a virtual reference line.

[0142] To effectively remove plaque, the toothbrush bristles 160 can be more densely arranged in the middle portion of the head cap 150 compared to the upper and lower ends. Furthermore, in the head cap 150, it is difficult to form bristle pores (not shown) around the portion containing the first electrode 110 and the second electrode 120.

[0143] Therefore, unlike the above, when the first electrode 110 and the second electrode 120 are arranged side by side on the virtual reference line, the unused space in the middle part of the head cover 150 increases when the first electrode 110 and the second electrode 120 are arranged parallel in the left-right direction. Consequently, more bristle holes can be formed in the head cover 150, making it difficult to densely pack the toothbrush bristles 160.

[0144] However, in the case where the first electrode 110 and the second electrode 120 included in the head unit 100 of the electric toothbrush 1 of the present invention are spaced apart from each other along the length direction of the auxiliary circuit board 140, the toothbrush bristles 160 can be arranged relatively densely on the head cover 150 to further improve the plaque removal effect.

[0145] Figure 15 To show the diagram of the signal supply section mounted on the main circuit board, Figures 16 to 18 A diagram illustrating the waveform of a signal according to an embodiment of the present invention. In particular, Figure 16 The filtered AC signal Sac' is shown in the figure. Figure 17 The DC signal Sdc is shown in the figure. Figure 18 The diagram shows the drive signal Vd, which is a mixture of the filtered AC signal Sac' and the DC signal Sdc. Furthermore, Figure 19 and Figure 20 This is a diagram illustrating the biofilm removal effect of a driving signal composed of a mixture of AC and DC signals.

[0146] Reference Figure 15 The signal supply unit SG1 can be mounted on the main circuit board 240 (see reference). Figure 5 The drive signal Vd can be generated using the battery voltage Vb supplied from battery 230.

[0147] In particular, the signal supply unit SG1 can mix alternating current (AC) signals and direct current (DC) signals to generate a drive signal Vd.

[0148] Therefore, the driving signal Vd contains both AC and DC components. The simultaneous application of AC and DC components creates an interactive effect and resonance, thereby enhancing the removal of biofilms that form on the tongue or upper palate.

[0149] Reference Figure 19 Electric fields based on DC components can cause uneven distribution of local charge, thus increasing the structural stress on biomembranes. Electric fields based on AC components can increase the permeability of external protective bodies by generating specific vibrations.

[0150] The interaction effect of this alternating current and direct current components can be achieved... Figure 20 This was confirmed in the study. That is, compared with the biofilm removal effect when an electric field based on AC component and an electric field based on DC component are provided separately, the biofilm removal effect is significantly superior when an electric field based on AC component and an electric field based on DC component are provided simultaneously and in an overlapping manner.

[0151] Since the driving signal Vd supplied by the signal supply unit SG1 in this embodiment of the invention can be provided by the electric field generating component based on both the DC component and the AC component, the removal effect of the amplification related to the above-mentioned biofilm can be achieved.

[0152] Furthermore, as mentioned above, the drive signal Vd is set to an overlapping form of AC voltage and DC voltage, thereby reducing the risk of electric shock and potential pain compared to applying only DC voltage.

[0153] On the other hand, as an example, the signal supply unit SG1 may include a DC-DC converter SG1a, a signal generator SG1b, a filter SG1c, and a calibration unit SG1d, and additionally, may include a voltage distribution unit SG1e.

[0154] The DC-DC converter SG1a can receive battery voltage Vb and convert it into a specified output voltage Vo for output.

[0155] The signal generation unit SG1b can operate based on the voltage received from the DC-DC converter SG1a, and can generate an AC signal Sac with a specified frequency using the output voltage Vo of the DC-DC converter SG1a.

[0156] The signal generation unit SG1b can be implemented using known structures that can generate AC signals, such as oscillators or function generators.

[0157] For example, the AC signal Sac can be set to a frequency of 1 kHz to 1000 MHz. This is because when the AC signal Sac is set to a low frequency below 1 kHz, the biofilm removal efficiency will decrease, and when the AC signal Sac is set to an ultra-high frequency above 1000 MHz, the biofilm removal efficiency will also decrease. On the other hand, the frequency of the AC signal Sac can be set to a frequency of 5 MHz to 15 MHz suitable for biofilm removal.

[0158] Furthermore, the amplitude of the AC signal Sac can be set from 0.1mV to 3V. When the amplitude of the AC signal Sac is less than 0.1mV, it is difficult to expect a biofilm removal effect, and when the amplitude of the AC signal Sac is greater than 3V, there is a concern that toxins may be generated due to the electrolysis of body fluids.

[0159] The filter SG1c performs filtering of the AC signal Sac generated by the signal generator SG1b. For example, the filter SG1c may include a bandpass filter, which can convert the sawtooth wave AC signal Sac into a sine wave AC signal Sac'. However, the type of filter SG1c is not limited; various filters can be used depending on the design.

[0160] The calibration unit SG1d can generate a drive signal Vd by mixing the AC signal Sac' supplied through the filter SG1c with the DC signal Sdc. As an example, the calibration unit SG1d can be embodied as an operating amplifier capable of combining (or overlapping) the AC signal Sac' and the DC signal Sdc, but it is not limited to this.

[0161] Therefore, when the AC signal Sac' is offset corresponding to the DC signal Sdc, a drive signal Vd that retains both AC and DC components can be generated.

[0162] The driving signal Vd incorporates characteristics of the AC signal Sac. Therefore, the driving signal Vd can be set to a frequency of 1kHz to 1000MHz, and can be set to a frequency of 5MHz to 15MHz that is more suitable for removing biofilms. Furthermore, the amplitude of the driving signal Vd can be set to 0.1mV to 3V.

[0163] Reference Figure 16 The calibration unit SG1d can receive an AC signal Sac' with an amplitude of A volts V from the filter SG1c, and the corresponding AC signal Sac' overlaps as follows: Figure 17 The DC signal Sdc of B volts V shown can ultimately generate, as shown in the figure. Figure 18The driving signal Vd is shown.

[0164] In this case, the voltage value of the DC signal Sdc can be set to be greater than or equal to the amplitude of the AC signal Sac'. Therefore, the voltage value of the drive signal Vd can be set to be greater than or equal to 0.

[0165] As a result, the DC bias value of the drive signal Vd can be set to be the same as or greater than the amplitude of the drive signal Vd.

[0166] When the DC bias value of the drive signal Vd is less than the amplitude value of the drive signal Vd, a range in which the voltage of the drive signal Vd has a negative value occurs. As the voltage has a negative value in the above range, energy loss will occur.

[0167] However, as shown in the embodiments of the present invention, if the DC bias value of the drive signal Vd is set to be the same as or greater than the amplitude of the drive signal Vd, the voltage of the drive signal Vd will always be "0", thus minimizing power loss.

[0168] On the other hand, the DC signal Sdc can be generated by the voltage distribution unit SG1e. For example, the voltage distribution unit SG1e can receive the output voltage Vo of the DC-DC converter SG1a and perform voltage distribution on the output voltage Vo to generate the DC signal Sdc.

[0169] The voltage distribution unit SG1e can be configured as a resistor array for distributing the output voltage Vo, but is not limited to this.

[0170] When the output voltage Vo of the DC-DC converter SG1a is suitable for direct application to the generation of the drive signal Vd, the corresponding output voltage Vo can perform the function of the DC signal Sdc. In this case, the voltage distribution unit SG1e can be omitted, and the output voltage Vo of the DC-DC converter SG1a can be input to the calibration unit SG1d.

[0171] Figure 21 and Figure 22 The diagram illustrates a modified example of the signal supply unit.

[0172] Reference Figure 21 and Figure 22 In a modified example, the signal supply unit SG2 may include a DC-DC converter SG2a, a signal generator SG2b, a voltage drop unit SG2e, a filter SG2c, and a bias adjustment unit SG2d.

[0173] The DC-DC converter SG2a can receive battery voltage Vb from battery 230 and convert the battery voltage Vb into a specified level of output voltage Vo for output.

[0174] The signal generation unit SG2b operates based on the voltage supplied from the DC-DC converter SG2a, and can use the output voltage Vo of the DC-DC converter SG2a to generate a first AC signal Sa1 with a specified frequency.

[0175] The signal generation unit SG2b0 can be implemented using known structures that can generate AC signals, such as oscillators and function generators.

[0176] For example, the first AC signal Sa1 can be set to a frequency of 1 kHz to 1000 MHz. This is because if the first AC signal Sa1 is set to a low frequency below 1 kHz, the biofilm removal effect will decrease; if the first AC signal Sa1 is set to an ultra-high frequency above 1000 MHz, the biofilm removal effect will also decrease. On the other hand, the frequency of the first AC signal Sa1 can be set to a frequency of 5 MHz to 15 MHz suitable for biofilm removal.

[0177] The voltage drop section SG2e can be used to reduce the magnitude (e.g., peak-to-peak voltage) of the first AC signal Sa1 output from the signal generator SG2b. For example, the voltage drop section SG2e can be embodied as a resistor R, thereby supplying a second AC signal Sa2 with a reduced magnitude compared to the first AC signal Sa1 from the voltage drop section SG2e.

[0178] The filter SG2c can perform filtering of the second AC signal Sa2 output from the voltage drop section SG2e. For example, the filter SG2c can be configured as a low-pass filter including a capacitor C, thereby converting the sawtooth wave type second AC signal Sa2 into a sine wave type third AC signal Sa3.

[0179] Furthermore, the precision of the drive signal Vd can be improved by removing the unexpected DC offset of the second AC signal Sa2 through the filter SG2c.

[0180] The bias adjustment unit SG2d can generate a drive signal Vd by mixing a DC signal with a third AC signal Sa3 output from the filter SG2c. For example, the bias adjustment unit SG2d may include multiple resistors R1 and R2, which can perform voltage distribution on the output voltage Vo of the DC-DC converter SG2a to generate a DC signal of a specified level.

[0181] That is, the DC signal generated at the common node N of the first resistor R1 and the second resistor R2 is superimposed on the third AC signal Sa3 supplied by the filter SG2c to generate the final driving signal Vd.

[0182] In this case, the amplitude of the driving signal Vd can be set from 0.1mV to 3V. When the amplitude of the driving signal Vd is less than 0.1mV, it is difficult to expect a biofilm removal effect. When the amplitude of the driving signal Vd is greater than 3V, there is a concern that toxins may be generated due to the electrolysis of body fluids.

[0183] Figure 23 A perspective view illustrating an example of the use of an electric toothbrush according to an embodiment of the present invention.

[0184] Reference Figure 23 When the user is not using the electric toothbrush 1 of this embodiment, it can be stored in the head unit 100 with the protective cover 400. When the user is carrying the electric toothbrush 1, the protective cover 400 can protect the toothbrush bristles 160 from external sources of contamination such as dust or foreign objects.

[0185] Furthermore, when the electric toothbrush 1 of this embodiment needs charging, the user can place the electric toothbrush 1 on the charger 300. In this case, the battery 230 can be charged wirelessly or via wired communication.

[0186] On the other hand, when the electric toothbrush 1 uses a wired charging method, a charging terminal is provided on the outside of the handle unit 200, and a charging terminal is provided on the charger 300, so that the terminals are in contact with each other.

[0187] In contrast, when the electric toothbrush 1 uses a wired charging method, it can use electromagnetic (electric field) induction using coils, resonance using magnetic resonance, and propagation (RF / Micro Wave Radiation) to convert electrical energy into microwaves for transmission.

[0188] The magnetic resonance method utilizes the magnetic resonance (magnetic resonance phenomenon) between the transmission coil module Tx and the receiving coil module Rx. The transmission coil module Tx is configured in the charger 300, and the receiving coil module Rx is configured in the electric toothbrush 1, so that power can be transmitted between the coils.

[0189] Those skilled in the art to which this invention pertains can implement this invention in other specific forms without altering its technical concept or essential features. Therefore, the embodiments described above are illustrative in all respects and are not intended to limit the invention. The scope of this invention is defined by the claims described below, and not by the detailed description above. The meaning, scope, and all modifications or variations derived from the equivalent concepts of the claims are within the scope of this invention.

Claims

1. An electric toothbrush, characterized in that, include: Head unit; and The handle unit is detachably connected to the head unit and supplies drive voltage to the head unit according to the user's control. The aforementioned handle unit includes: An insertion member includes a base portion and at least one protrusion projecting from the base portion; and Multiple connection terminals, some of which protrude outward from the aforementioned insertion component, are electrically connected to the aforementioned head unit when the aforementioned head unit is combined with the aforementioned handle unit. The above header unit includes: A receiving component includes an introduction portion, an anti-disengagement portion, and multiple insertion portions. The introduction portion is inserted to a depth into which the insertion components can be inserted. The anti-disengagement portions protrude from the inner wall surface of the introduction portion. If the insertion component is rotated by a predetermined angle while inserted into the introduction portion, the anti-disengagement portion and the protrusion overlap each other. The insertion portions penetrate the bottom surface of the introduction portion. The electrode assembly is disposed adjacent to the receiving member inside the head unit. When the handle unit is combined with the head unit, it passes through the plurality of insertion portions to electrically connect with the end portions of the plurality of connection terminals located inside the head unit. The aforementioned handle unit includes: The handle cover is combined with the aforementioned insertion component; The battery is located in the outer cover of the aforementioned handle; The main circuit board is equipped with a signal supply unit that generates a drive voltage using the voltage of the aforementioned battery; and The connection module includes a contact block formed of a non-conductive material and contact terminals formed of a conductive material and surrounding the contact block. One side of the contact terminals contacts the main circuit board, and the other side contacts a plurality of the connection terminals. The above header unit includes: A head cover, including a head with an opening on one side and a connecting part communicating with the head; The auxiliary circuit board is located inside the aforementioned head cover; A head cover that closes the opening in the head. Toothbrush bristles, attached to the aforementioned head cap; and The first and second electrodes, located on the auxiliary circuit board at positions corresponding to the head, are used to generate an electric field. The electrode assembly is disposed adjacent to the portion of the joint that is coupled to the handle unit, and is coupled to the auxiliary circuit board. The above electrode assembly includes: An insulating component, formed of a non-conductive material, has through holes for inserting a portion of the aforementioned auxiliary circuit board; and The conductive component, formed of a conductive material, has one side disposed in the portion of the insulating component with a through hole and electrically connected to the auxiliary circuit board, and the other side disposed adjacent to the housing component. When the handle unit and the head unit are combined, it is electrically connected to the plurality of connection terminals. The aforementioned conductive components include: A holding part, used to hold the portion of the insulating component in which the through hole is formed; A pressure-applying portion, formed in a bent or folded manner on the portion of the gripping part that contacts the auxiliary circuit board, is used to apply pressure to the auxiliary circuit board; and A contact portion extends from the aforementioned holding portion and contacts the aforementioned connecting terminal.

2. The electric toothbrush according to claim 1, characterized in that, The end portion of the aforementioned contact is separated from the aforementioned insulating component. The middle portion of the aforementioned contact portion protrudes toward the plurality of aforementioned connection terminals.

3. The electric toothbrush according to claim 1, characterized in that, At least one rod-shaped extension is formed on the auxiliary circuit board to allow it to be inserted into the through hole of the insulating component.

4. The electric toothbrush according to claim 1, characterized in that, The first electrode and the second electrode are spaced apart from each other along the length of the auxiliary circuit board.

5. The electric toothbrush according to claim 1, characterized in that, The aforementioned head unit also includes a light-emitting device disposed on the aforementioned auxiliary circuit board for irradiating light to the outside.

6. The electric toothbrush according to claim 1, characterized in that, The aforementioned head cover is made of a transparent material.

7. The electric toothbrush according to claim 1, characterized in that, The aforementioned handle unit also includes a sealing component located in the handle cover at the portion that contacts the head unit and is used to seal between the handle cover and the head unit.

8. The electric toothbrush according to claim 1 or 2, characterized in that, The plurality of the above-mentioned connection terminals include: First connecting terminal; and At least one second connection terminal is disposed separately from the first connection terminal.

9. The electric toothbrush according to claim 8, characterized in that, The plurality of the above-mentioned insertion parts include: A first insertion portion penetrates the bottom surface of the aforementioned inlet portion, enabling the first connecting terminal to be electrically connected to the aforementioned electrode assembly; and At least one second insertion portion penetrates the bottom surface of the aforementioned inlet portion, enabling the aforementioned second connecting terminal to be electrically connected to the aforementioned electrode assembly. It is arc-shaped so that when the handle unit and the head unit are rotated relative to each other while the aforementioned second connecting terminal is inserted, the aforementioned second connecting terminal can be moved from one end to the other.

10. The electric toothbrush according to claim 9, characterized in that, The aforementioned second insertion part includes: In the first region, when the insertion member is inserted into the inlet portion of the receiving member, at least one of the second connection terminals is located in the first region. The second region, facing the intermediate portion protruding from the contact portion toward the plurality of connecting terminals, when the insertion member is inserted into the introduction portion of the receiving member and rotated by a predetermined angle, at least one of the second connecting terminals moves from the first region and ultimately resides in the second region; and The positioning protrusion protrudes from a portion of the second region of the second insertion part. When an external force of a threshold value or higher is applied while the second connection terminal is located in the second region, the second connection terminal can be disengaged from the second region. When no external force of a threshold value or higher is applied, the second connection terminal remains located in the second region.

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