KR102203708B1 - Multi cleaning type interdental brush - Google Patents

Abstract

A toothbrush body comprising a head portion and a handle portion, which proposes a multi-cleaning-type interdental toothbrush capable of simultaneously cleaning a plurality of interdental teeth and massaging a tooth or gum, and not one interdental tooth; And a plurality of interdental brushes which are provided in the head and are inserted into the interdental to clean the interdental, and are arranged in a state spaced apart from each other while being composed of a plurality of teeth.

Description

Multi-cleaning type interdental toothbrush{MULTI CLEANING TYPE INTERDENTAL BRUSH}

The embodiments disclosed in the present specification relate to an interdental toothbrush, and more particularly, to a multi-cleaning type interdental toothbrush capable of simultaneously cleaning a plurality of interdentals rather than a single interdental toothbrush and massaging a tooth or gum.

Typically, a toothbrush is a tool for cleaning the surface of a tooth with toothpaste.

However, with such a toothbrush, there is a limit to removing food or foreign substances such as plaque or tartar between teeth, that is, between teeth.

Therefore, it is required to use an interdental toothbrush or dental floss separately from a general toothbrush to remove foreign substances between teeth.

Here, the interdental toothbrush is directly inserted between the teeth to remove food or foreign substances between the teeth, thereby being effective in the management of natural teeth, and especially effective in the management of implants.

In other words, since surgery is performed on the gums during the implant procedure, food or foreign substances between the teeth must be removed so that inflammation does not occur during the healing process of the gums, and blood circulation must be promoted by lightly massaging the gums. Is required.

A typical interdental toothbrush is formed as an awl-shaped brush and inserted into the interdental to remove foreign substances while reciprocating in the longitudinal direction by the user.

However, since a conventional interdental toothbrush is composed of one brush, there is a limitation in that only one interdental toothbrush can be cleaned.

In addition, a conventional interdental toothbrush only cleans the space between the teeth, and can massage the cervical (the boundary where the teeth and the gums meet) or the gums on the labial (lip side) or tongue (tongue side) of the teeth. There are no limits.

As a related prior art, looking at the interdental toothbrush disclosed in Korean Laid-Open Patent Publication No. 10-2017-0009824, there is a limit to cleaning only one interdental toothbrush since the interdental toothbrush is composed of a single brush.

On the other hand, toothbrushes or interdental toothbrushes are effective in maintaining teeth only when the growth of bacteria or bacteria is suppressed, and for this purpose, they must be dried quickly after use. However, since the prior art interdental toothbrush lacks a configuration capable of quickly drying the bristles, bacteria or bacteria may grow on the brush.

Accordingly, a new technology is required to overcome the limitations of the prior art as described above.

On the other hand, the above-described background technology is technical information that the inventor possessed for derivation of the present invention or acquired during the derivation process of the present invention, and is not necessarily known to be publicly known before filing the present invention. .

The embodiments disclosed in the present specification are intended to provide a multi-cleaning type interdental toothbrush capable of simultaneously cleaning a plurality of interdentals instead of one interdental toothbrush.

In addition, the embodiments disclosed in the present specification are intended to provide a multi-cleaning type interdental toothbrush capable of cleaning the interdental and massaging the cervical or gums on the face or tongue.

In addition, the embodiments disclosed in the present specification are intended to provide a multi-cleaning type interdental toothbrush that can quickly dry the head or brush by discharging moisture from the head or brush of the toothbrush body, and stably grip the handle. There is this.

In addition, the embodiments disclosed in the present specification aim to provide a multi-cleaning type interdental toothbrush in which the head portion is bent at a predetermined angle with the handle portion so that the head portion can face in parallel with the teeth.

In addition, embodiments disclosed in the present specification aim to provide a multi-cleaning type interdental toothbrush capable of converting the angle of the head portion into various angles.

As a technical means for achieving the above-described technical problem, a multi-cleaning type interdental toothbrush according to an embodiment includes: a toothbrush body comprising a head portion and a handle portion; And a plurality of interdental brushes that are provided in the head and are inserted into the interdental to clean the interdental, and are configured in a plurality and are disposed to be spaced apart from each other to be simultaneously inserted into the plurality of interdental brushes.

In addition, as a technical means for achieving the above-described technical problem, the plurality of interdental brushes form a pair of a plurality of interdental brushes spaced apart in the width direction of the head portion, so that a pair of interdental brushes is formed at the upper and lower portions of one tooth. It is inserted at the same time, and the set of interdental brushes forms a plurality of sets in the longitudinal direction of the head and is formed in a spaced state, so that a plurality of sets of interdental brushes can be simultaneously inserted into the plurality of teeth.

In addition, as a technical means for achieving the above-described technical problem, the interdental brush is formed of a material having elasticity while having a set length, the elastic stick is fixed to the lower end of the head portion; And a cleaning protrusion protruding along the longitudinal direction of the elastic stick to perform cleaning.

In addition, as a technical means for achieving the above-described technical problem, the interdental brush may have a lower end fixed to the head portion while a plurality of wires having a set length form one group.

In addition, as a technical means for achieving the above-described technical problem, the interdental toothbrush is formed to have a length shorter than the length of the interdental brush and is disposed between the interdental brushes, and faces the tooth or gum while facing the tooth or gum It may further include a plurality of massage brushes for massaging.

In addition, as a technical means for achieving the above-described technical problem, the toothbrush body may include a drain hole formed through the head to discharge moisture from a surface on which the interdental brush is formed to an opposite surface.

In addition, as a technical means for achieving the above-described technical problem, the toothbrush body may be formed to be bent in a direction orthogonal to the bristles while the handle portion and the head portion form a predetermined angle.

In addition, as a technical means for achieving the above-described technical problem, the toothbrush body may further include a grip portion formed while being curved along the length direction of the handle portion to provide a seating portion of the finger.

In addition, as a technical means for achieving the above-described technical problem, the toothbrush body may further include an angle adjusting unit that allows the angle adjustment of the head unit and the handle while detachably coupling the head unit and the handle unit. have.

In addition, as a technical means for achieving the above-described technical problem, the angle adjustment unit is formed to protrude in a cylindrical shape on the head portion, the head rotation shaft forming the rotation center of the head portion; A shaft holder formed in the shape of a groove or a hole in the handle portion to which the head rotation shaft is rotatably coupled; An angle setting protrusion protruding from the head portion and protruding in an equiangular radial shape around the head rotation axis to set the angle of the head portion; And a protrusion holder formed on the handle portion while forming a groove shape corresponding to the angle setting protrusion to match the angle setting protrusion.

According to any one of the above-described problem solving means, it is possible to provide an interdental toothbrush capable of simultaneously cleaning a plurality of interdental brushes since the interdental brushes are formed in a plurality and are spaced apart from each other and inserted simultaneously into a plurality of interdentals.

In addition, according to any one of the above-described problem solving means, since a pair of interdental brushes are simultaneously inserted into one upper and lower interdental while forming a pair, a multi-cleaning type interdental toothbrush that can be cleaned more quickly and cleanly. Can be presented.

In addition, according to any one of the above-described problem solving means, since massage brushes of a short length are provided between the interdental brushes, it is possible to massage the cervical or gums of the teeth at the same time as the interdental cleaning. It is possible to propose a multi-cleaning type interdental toothbrush that is effective for maintenance and maintenance.

In addition, according to any one of the above-described problem solving means, the moisture of the brush is discharged as the drain hole is formed in the head, so that the brush can be dried smoothly and quickly, so that the growth of bacteria or bacteria in the brush is suppressed and maintained. Is effective for

A multi-cleaning interdental toothbrush capable of stably holding the handle through the grip portion can be presented.

In addition, according to any one of the above-described problem solving means, it is possible to present a multi-cleaning type interdental toothbrush capable of reducing the angle of movement of the arm by bending the head portion and the handle portion at a predetermined angle.

In addition, according to any one of the above-described problem solving means, since the angle between the head and the handle can be switched to various angles by the angle adjustment unit, the angle of the head portion to correspond to the left or right side of the tooth row or the pure surface or the tongue surface of the tooth row. A multi-clean interdental toothbrush that can be converted can be presented.

The effects that can be obtained in the disclosed embodiments are not limited to the above-mentioned effects, and other effects not mentioned are obvious to those of ordinary skill in the art to which the embodiments disclosed from the following description belong. Can be understood.

1 is a front view showing the configuration of a multi-cleaning type interdental toothbrush according to an embodiment.
2 is a longitudinal sectional view showing a multi-cleaning type interdental toothbrush according to an embodiment.
3 is a longitudinal cross-sectional view showing another embodiment of the interdental brush shown in FIG. 2.
4 is a view showing a state of use of a multi-cleaning type interdental toothbrush according to an embodiment.
5 is a block diagram showing an angle adjustment unit of a multi-cleaning type interdental toothbrush according to an embodiment.
6 is an exploded perspective view showing an angle adjusting part of a multi-cleaning type interdental toothbrush according to an embodiment.
7 is a longitudinal sectional view showing another embodiment of the interdental brush shown in FIG. 2.
8 is a view showing a state of use of the multi-cleaning type interdental toothbrush shown in FIG. 7.

Hereinafter, various embodiments will be described in detail with reference to the accompanying drawings. The embodiments described below may be modified and implemented in various different forms. In order to more clearly describe the features of the embodiments, detailed descriptions of matters widely known to those of ordinary skill in the art to which the following embodiments belong are omitted. In addition, parts not related to the description of the embodiments are omitted in the drawings, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a configuration is said to be "connected" with another configuration, this includes not only a case of being'directly connected' but also a case of being'connected with another configuration in between'. In addition, when a certain configuration "includes" a certain configuration, this means that other configurations may be further included rather than excluding other configurations, unless otherwise specified.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a front view showing the configuration of a multi-cleaning type interdental toothbrush according to an embodiment, FIG. 2 is a longitudinal sectional view showing a multi-cleaning type interdental toothbrush according to an embodiment, and FIG. 3 is a view of the interdental brush shown in FIG. It is a longitudinal sectional view showing another embodiment. In addition, Figure 4 is a view showing a state of use of a multi-cleaning type interdental toothbrush according to an embodiment.

A multi-cleaning type interdental toothbrush according to an embodiment is for massaging the cervical or gums of a tooth while simultaneously cleaning a plurality of interdentals formed by teeth 1 as shown in FIG. 4. As shown, it may be configured to include the toothbrush body 100, the interdental brush 200, and the massage brush 300.

The toothbrush body 100 may include a head portion 110 and a handle portion 120.

Specifically, the head portion 110 is a component that is introduced into the oral cavity by implanting the interdental brush 200 to be described later.

The head part 110 may be fixed while the interdental brush 200 is planted on one side, and a separate plate on which the interdental brush 200 is planted is buried on one side, so that the interdental brushes 200 are fixed together. May be.

Meanwhile, as shown in FIGS. 1 and 2, the head part 110 has at least one drain hole 115 formed therethrough, so that moisture from the interdental brush 200 may be discharged to the opposite surface.

These drainage holes 115 may dry the interdental brush 200 and the massage brush 300 by communicating air together with the discharge of moisture, and unlike shown, a plurality of drainage holes 115 may be formed to penetrate through the head part 110. May be.

Here, the drain hole 115 may be formed while penetrating from the surface of the head portion 110 to the rear surface as shown in FIG. 2 and forming a downward slope in the direction of the handle portion 120.

Accordingly, when the interdental toothbrush is vertically mounted, the drain hole 115 can smoothly discharge moisture from the head surface downward.

Of course, the drain hole 115 may be formed in a horizontal direction as shown in FIG. 3.

The handle part 120 is held by the user, and is fixed to one end of both ends in the longitudinal direction of the head part 110 and extends long, thereby being gripped by the user.

As shown in FIG. 2, the handle part 120 may be stably gripped by forming a grip part 125 that is curved along the length direction.

Specifically, the grip unit 125 may be configured to include a thumb seating groove 125a formed on the front surface of the handle unit 120 and a finger locking groove 125b formed on the rear surface of the handle unit 120, and the surface It is also possible to prevent slipping by protruding a plurality of protrusions not shown.

Here, the handle portion 120 may be formed in a bent state while forming a predetermined angle with the head portion 110 as shown in FIG. 1.

Specifically, the head part 110 may be fixed to the handle part 120 while being bent in a direction orthogonal to the interdental brush 200, and may be manufactured for right-handed or left-handed users while being bent to the left or right.

The interdental brush 200 is provided in the head portion 110 of the toothbrush body 100 and is a component for removing food or foreign substances such as plaque or tartar that are stuck between the teeth while being inserted between the teeth.

The interdental brush 200 may include an elastic stick 210 and a cleaning protrusion 220 as shown in FIGS. 1 and 2.

The elastic stick 210 is inserted into the interdental, and is formed of a material having elasticity while having a predetermined length, so that the lower end may be fixed to the head portion 110.

The elastic stick 210 may be made of a synthetic rubber or silicone material that is harmless to the human body and has elasticity, and as shown in FIG. 2, it is formed sharply from the root to the tip and can be inserted between the teeth.

The cleaning protrusion 220 is a member that performs interdental cleaning, and is formed on the outer peripheral surface of the elastic stick 210 in a plurality of protrusions along the longitudinal direction, as shown enlarged in FIG. Can be washed.

The cleaning protrusion 220 may be formed of the same material as the elastic stick 210 to have elasticity.

Here, the cleaning protrusion 220 may protrude in a longitudinal direction and a vertical direction of the elastic stick 210, as shown enlarged in FIG. 2, while forming an inclination toward the front end or the root of the elastic stick 210 It can protrude.

In addition, the cleaning protrusion 220 may be formed to become shorter in length toward the front end of the elastic stick 210.

Meanwhile, the interdental brush 200 may be configured to include a metal wire 230 and a metal brush 240 as shown in FIG. 3.

The metal wire 230 is formed in the form of a metal rod having an elasticity while having a thickness thinner than the elastic stick 210 described above, so that the lower end may be fixed to the head portion 110, and formed to a predetermined length and inserted between the teeth. Can be.

The metal brush 240 is a member that performs interdental cleaning, and is formed on the outer peripheral surface of the metal wire 230 in a plurality of protrusions along the longitudinal direction as shown enlarged in FIG. 3 to prevent foreign substances while facing the teeth and gums between the teeth. Can be washed.

The metal brush 240 may be formed of a metal material having a thickness thinner than that of the metal wire 230 and may protrude while forming a vertical direction with the metal wire 230. Unlike this, the metal brush 240 is inclined toward the front end or the root of the metal wire 230. It can protrude while forming.

In addition, the metal brush 240 may be formed to become shorter in length toward the front end of the metal wire 230.

On the other hand, Figure 7 is a longitudinal sectional view showing another embodiment of the interdental brush shown in Figure 2, Figure 8 is a view showing a state of use of the multi-cleaning type interdental toothbrush shown in FIG.

The interdental brush 200 may be composed of a plurality of wires 250 as shown in FIG. 7.

The wire 250 may be made of synthetic resin or plastic material while having a predetermined length, and the plurality of wires 250 form one group and the lower end of the head 110 is planted to form one interdental brush 200. Can be formed.

Here, as shown in FIGS. 2 and 3, the interdental brush 200 is configured in plural and disposed in a spaced state, so that the interdental brush 200 may be simultaneously inserted into a plurality of interdentals to simultaneously clean a plurality of interdentals.

That is, a plurality of interdental brushes 200 may be simultaneously inserted into a plurality of interdentals as shown in FIGS. 4 and 8 by being disposed in a state spaced apart from each other along the longitudinal direction of the head portion 110.

Here, in the drawings of the present specification, the interdental brush 200 is configured to form three rows, and is illustrated as an embodiment in which the interdental brushes 200 are simultaneously inserted into three interdentals, but the present invention is not limited thereto. The interdental brush 200 may be inserted at the same time between the teeth or the interdental brush 200 may be configured to exceed three rows.

Meanwhile, as shown in FIG. 1, the interdental brush 200 may be configured such that a plurality of spaced apart states in the width direction of the head unit 110 form a pair.

That is, as the interdental brush 200 forms a pair, a pair of brushes can be simultaneously inserted in the upper and lower portions of one interdental to perform cleaning, and a pair of brushes is the length of the head portion 110 As they are spaced apart while forming a plurality of pairs in the direction, they may be simultaneously inserted into a plurality of teeth.

For example, as shown in FIG. 1, the interdental brush 200 is spaced apart in the longitudinal direction of the head unit 110 while a set of brushes forms three rows, thereby simultaneously cleaning the upper and lower portions of each of the three interdentals.

Of course, the interdental brush 200 may be configured such that one or more pairs form a pair.

The massage brush 300 is a component for massaging the teeth or gums when cleaning through the interdental brush 200.

Specifically, the massage brush 300 is formed to have a length shorter than the length of the interdental brush 200 described above and is disposed between the interdental brushes 200 to perform a function of massaging a tooth, a gum, or a cervical region.

The massage brush 300 may include an elastic stick 210 and a cleaning protrusion 220 in the same manner as the above-described interdental brush 200.

In addition, the massage brush 300 may be configured in the same manner when the interdental brush 200 is composed of a metal wire 230 and a metal brush 240 as shown in FIG. As described above, when the interdental brush 200 is composed of a plurality of wires 250, it may be configured in the same manner.

Here, the massage brush 300 has a length shorter than that of the interdental brush 200 and is disposed between the interdental brushes 200 in a plurality, so that when the interdental brush 200 is inserted into the interdental, it faces a tooth, a cervical region, or a gum While doing so, it is possible to provide an effect of massaging the contact area by contacting the facing area.

On the other hand, Figure 5 is a configuration diagram showing the angle adjustment unit of the multi-cleaning type interdental toothbrush according to an embodiment, Figure 6 is an exploded perspective view showing the angle adjustment unit of the multi-cleaning type interdental toothbrush according to an embodiment.

The aforementioned toothbrush body 100 may be configured such that the head portion 110 and the handle portion 120 are detachable, and the head portion 110 and the handle portion 120 are angle adjusting portions as shown in FIG. 5. Can be combined by 500.

That is, the angle adjustment unit 500 is a component that allows the angle adjustment of the head unit 110 while detachably coupling the head unit 110 and the handle unit 120.

For example, the angle adjustment unit 500 may be configured to include a head rotation shaft 310, a shaft holder 320, an angle setting protrusion 330, and a protrusion holder 340 as shown in FIGS. 5 and 6 .

The head rotation shaft 310 may protrude while forming a cylindrical shape on the head portion 110 to provide a center of rotation together with a fixed portion of the head portion 110.

The shaft holder 320 may be formed in the shape of a groove or a hole in the handle portion 120 so that the head rotation shaft 310 is rotatably fitted and fixed.

That is, the head unit 110 may be detachably coupled by being coupled to the shaft holder 320 of the handle unit 120 through the head rotation shaft 310, and rotates in a forward or reverse direction around the head rotation shaft 310 While doing it, the angle with the handle part 120 can be adjusted.

Here, the head rotation shaft 310 is fitted with a locking groove 321 formed in the shaft holder 320 by having a locking projection 311 formed at the tip portion as shown enlarged in FIG. It may not be separated, and when it is separated from the shaft holder 310, it may be configured to be separated through pressure by a user.

The angle setting protrusion 330 and the protrusion holder 340 are components for setting the angle of the head unit 110 to a set angle.

Specifically, the angle setting protrusion 330 may protrude from the head portion 110 as shown in FIG. 6 and protrude in an equiangular radial shape around the head rotation shaft 310, and the protrusion holder 340 is an angle While forming a groove shape corresponding to the setting protrusion 330, while being formed in the handle portion 120, it may be formed on the outer periphery of the shaft holder 320.

That is, the angle setting protrusion 330 can prevent the head unit 110 from rotating arbitrarily as it is fitted into the protrusion holder 340, and the angle of the head unit 110 is formed by a plurality of equiangular radial types. Can be set by dividing into plural.

For example, when the angle setting protrusion 330 is formed into eight as shown in FIG. 6, the angle may be set at intervals of 45 degrees, but the present invention is not limited thereto, and the angle of the head part 110 is the handle part ( 120) may be formed to be adjusted at intervals of 5 degrees in a range of 45 degrees to the left and right.

Accordingly, the head portion 110 may be switched to an optimum angle with the handle portion 120 according to the cleaning position.

A method of using a multi-cleaning type interdental toothbrush according to an embodiment including the above components will be described.

The user may adjust the angle of the head unit 110 according to the position of the cleaning target, that is, the pure surface, the tongue surface, the left and right sides of the teeth.

Specifically, the user presses the head unit 110 and the handle unit 120 to separate the head rotation shaft 310 from the shaft holder 320, and then rotates the head unit 110 at a set angle. The rotation shaft 310 is fitted by fitting the shaft holder 320 to be coupled.

In this case, the head unit 110 may be fixed at a set angle as the angle setting protrusions 330 are fitted to the protrusion holder 340.

Then, the user inserts the interdental brush 200 into the interdental of the tooth while holding the grip portion 125 formed on the handle 120 to clean the interdental.

At this time, as a plurality of interdental brushes 200 form a pair, the upper and lower portions of one tooth may be cleaned at the same time, and as a plurality of teeth are simultaneously inserted into a plurality of teeth, a plurality of interdental teeth may be cleaned at the same time. .

At the same time, the massage brush 300 is in contact with the teeth or gums, thereby massaging the contact area, thereby improving blood circulation.

As described above, in the multi-cleaning type interdental toothbrush according to an embodiment, since the interdental brush 200 is formed in a plurality and is spaced apart from each other and inserted at the same time into a plurality of interdentals, a plurality of interdental teeth can be cleaned at the same time, and a massage brush Since 300 massages the gums or teeth during interdental cleaning, it may be particularly suitable for dental care of patients undergoing implant surgery.

The above-described embodiments are for illustrative purposes only, and those of ordinary skill in the art to which the above-described embodiments belong can easily transform into other specific forms without changing the technical idea or essential features of the above-described embodiments. You can understand. Therefore, it should be understood that the above-described embodiments are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope to be protected through the present specification is indicated by the claims to be described later rather than the detailed description, and should be interpreted as including all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof. .

100: toothbrush body
110: head
115: drain hole
120: handle
125: grip part
200: Interdental brush
210: elastic stick
220: washing protrusion
230: metal wire
240: metal brush
250: wire
300: massage brush
500: angle adjustment unit
310: head rotation shaft
311: locking jaw
320: shaft holder
321: locking groove
330: angle setting protrusion
340: protruding holder

Claims (10)

Toothbrush body consisting of a head portion and a handle portion; And
It includes a plurality of interdental brushes that are provided in the head and are inserted into the interdental to clean the interdental, but are arranged in a state spaced apart from each other while being composed of a plurality, and are simultaneously inserted into the plurality of interdental brushes,
The interdental brush,
A single elastic stick formed of a material having an elasticity while having a set length and fixed at a lower end to the head portion;
A cleaning protrusion protruding along the longitudinal direction of the elastic stick to perform cleaning, the cleaning protrusion protruding while being inclined toward the front end or the root of the elastic stick; And
A plurality of massage brushes formed to have a length shorter than the length of the interdental brush and disposed between the interdental brushes and for massaging the tooth or gum while facing the surface or the gum of the tooth,
The plurality of massage brushes,
A multi-cleaning type interdental toothbrush whose length gradually decreases as the distance from the interdental brush increases.
The method of claim 1,
The plurality of interdental brushes,
A plurality of teeth spaced apart in the width direction of the head portion form a pair, so that a set of interdental brushes is simultaneously inserted into the upper and lower portions of one of the teeth, and the set of interdental brushes forms a plurality of sets in the longitudinal direction of the head. A multi-cleaning type interdental toothbrush that is formed in a spaced state so that a plurality of sets of interdental brushes are simultaneously inserted between a plurality of teeth.
delete delete delete The method of claim 1,
The toothbrush body,
Multi-cleaning type interdental toothbrush comprising a drain hole formed through the head portion to discharge moisture from a surface on which the interdental brush is formed to an opposite surface.
The method of claim 1,
The toothbrush body,
A multi-cleaning type interdental toothbrush formed by bending the handle portion and the head portion in a direction perpendicular to the interdental brush while forming a predetermined angle.
The method of claim 1,
The toothbrush body,
Multi-cleansing type interdental toothbrush further comprising a grip portion formed while being curved along the length direction of the handle portion to provide a seating portion of the finger.
The method of claim 1,
The toothbrush body,
Multi-cleansing type interdental toothbrush further comprising an angle adjusting part allowing angle adjustment of the head part and the handle while detachably coupling the head part and the handle part.
The method of claim 9,
The angle adjustment unit,
A head rotation shaft protruding from the head portion in a cylindrical shape to form a rotation center of the head portion;
A shaft holder formed in the shape of a groove or a hole in the handle portion to which the head rotation shaft is rotatably coupled;
An angle setting protrusion protruding from the head portion and protruding in an equiangular radial shape around the head rotation axis to set the angle of the head portion; And
Multi-cleaning type interdental toothbrush comprising a protrusion holder formed on the handle portion and mated with the angle setting protrusion while forming a groove shape corresponding to the angle setting protrusion.

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