KR20190060454A - Oral cleaner - Google Patents

Abstract

Discloses an oral cleanser. An oral cleanser according to one embodiment comprises: a housing including an opening formed in one side; A body positioned within the housing; A head part connected to the body part at one side and to the outside of the housing at the other side; And a vibrating part connected to the head part and vibrating the head part. The vibration displacement of the other end of the head part located outside the housing may be larger than the vibration displacement of the head part located in the housing.

Description

ORAL CLEANER

The following example relates to an oral cleanser.

Generally, a toothbrush used for removing food residue, plaque, and calculus between teeth after eating food has played a major role in preventing tooth decay, periodontal disease and gingivitis as an oral hygiene tool.

Toothbrush is a tool used for brushing teeth with toothpaste for health care and hygiene cleansing of teeth. It is composed of a stick-shaped handle and a brush formed of a thin body member formed on the body formed at the tip of the handle brush.

When the tooth is cleaned, the brush is rubbed against the tooth and rubbed to remove the tooth in the mouth. When the brushing operation is completed, the inside of the mouth is cleaned with the cleansing water and the tooth is spit out.

The electric toothbrush is an apparatus that automatically performs such brushing operation. The electric toothbrush generates vibrations of the brush through a motor that operates with electricity, thereby cleaning the surface of the tooth. In this case, the greater the vibration displacement of the brush due to the vibration, the more effective tooth cleaning can be performed.

On the other hand, the vibration of the brush is transmitted to the grip connected to the brush. As the vibration energy transmitted to the grip increases, the vibration displacement of the brush decreases, and the inconvenience of the user gripping the grip also increases.

Accordingly, there is a need for a device that can maximize the vibration of the brush for effective tooth cleaning while minimizing the intensity of the vibration transmitted to the handle held by the user.

In this regard, Korean Patent Registration No. 10-0999270 discloses a powered toothbrush having a flat vibration motor between a toothbrush plate on which bristles are planted and a toothbrush head.

An object according to an embodiment is to provide a mouth washer capable of maximizing the vibration of a brush for wiping a user's teeth.

An object according to an embodiment is to provide a mouth washer capable of minimizing vibration of a housing held by a user.

An oral cleanser according to one embodiment comprises: a housing including an opening formed in one side; A body positioned within the housing; A head part connected to the body part at one side and to the outside of the housing at the other side; And a vibration part connected to the head part to vibrate the head part. The vibration displacement at the other end of the head part located outside the housing may be larger than the vibration displacement of the head part located in the housing.

In one aspect of the present invention, the head unit includes: a connecting member having one side connected to the body and extending in the longitudinal direction, and connected to the vibrating unit; A supporting member connected to the other side of the connecting member so as to be spaced apart from the body portion; And a tip connected to the support member and extending longitudinally to pass through the opening.

On one side, the center of the tip and the connecting portion of the connecting member with respect to the supporting member may be spaced apart from each other.

The contacting portion of the vibrating portion and the connecting member may be eccentric from an imaginary axis passing through the center of the opening.

In one aspect of the present invention, the body portion may include: a slit formed on an outer surface; And a damping member having one side fixed to the body portion and the other side positioned in the slit, and the connecting member can be connected to the damping member.

In one side, the damping member may vibrate in the slit according to the vibration of the connecting member, thereby attenuating the vibration transmitted to the body.

In one aspect of the present invention, the vibrating portion includes an electric motor and a contact member connected to a rotating shaft of the electric motor, and the contact member can selectively contact the connecting member in accordance with rotation of the electric motor.

[0027] In one aspect of the present invention, the electric motor further includes a housing member connected to the connecting member, and the electric motor can be fixed to the housing member.

On one side, an end of the tip located outside the housing may include a curved surface bent against the longitudinal direction of the tip.

In one aspect of the present invention, the oral cleaner may further include a buffer part disposed between the opening and the tip for attenuating an impact force due to vibration of the tip.

In one aspect, the oral cleaner may further include a brush portion connected to the tip, the brush portion having a brush for cleaning the mouth of the user.

In one aspect of the present invention, the oral cleaner may further include an impact absorbing member disposed between the housing and the body portion, the impact absorbing member reducing the impact force due to the vibration of the body portion.

The oral cleaner according to one embodiment can maximize the vibration of the head portion by directly connecting the vibration source that generates the vibration to the head portion.

The oral cleanser according to an embodiment attenuates the vibration transmitted through the connecting portion of the body portion and the head portion, thereby minimizing the vibration transmitted to the body portion.

The oral cleanser according to one embodiment can minimize vibrations transmitted to the housing by attenuating vibrations between the body and the housing.

The effects of the oral cleanser according to one embodiment are not limited to those mentioned above, and other effects not mentioned may be clearly understood by those of ordinary skill in the art from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 is a perspective view of an oral cleanser according to one embodiment.
2 is a plan view of a head according to one embodiment.
3 is a plan view of the head according to one embodiment.
4 is a perspective view of a head and a body according to one embodiment.
5 is a side view of the head and body according to one embodiment.
6 is a perspective view showing a vibrating part according to an embodiment.
7 is a perspective view showing a buffer unit according to one embodiment.
8 is a plan perspective view of an oral cleanser according to one embodiment.
9 is a perspective view showing a brush part according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments, detailed description of known functions and configurations incorporated herein will be omitted when it may make the best of an understanding clear.

In describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be " connected, " " coupled, " or " connected. &Quot;

The components included in any one embodiment and the components including common functions will be described using the same names in other embodiments. Unless otherwise stated, the description of any one embodiment may be applied to other embodiments, and a detailed description thereof will be omitted in the overlapping scope.

1 is a perspective view of an oral cleanser according to one embodiment.

Referring to FIG. 1, the oral cleanser 1 according to one embodiment can effectively clean the oral cavity of a user. For example, the oral cleanser 1 can automatically clean the user's teeth through a brushing action according to vibration, without the user's separate action. In addition, the oral cleanser 1 minimizes the inconvenience that the user may feel during operation, by minimizing the transmission of vibration due to brushing to the user's hand holding the oral cleanser. The oral cleaner 1 according to an embodiment includes a housing 100, a body 110, a head 120, a fluid 140, a vibrator 130, a buffer 150, 160 < / RTI >

The housing 100 can form the appearance of the mouth washer 1 so that the user can grasp it. The housing 100 may be formed in the form of a handle having a longitudinal direction so that the user can easily grasp it. The housing 100 is made of an insulating material, for example, a plastic material, so that the problem of electric shock due to the electronic parts disposed therein can be prevented. A switch (not shown) or the like which can be operated by the user for operating the oral care appliance 1 may be provided on the outer surface of the housing 100.

The housing 100 may include a receiving space 102 provided therein, an opening 101 formed at one side, and an insertion port (not shown) formed at the other side.

The body portion 110 of the oral cleanser 1 may be disposed in the accommodation space 102. The receiving space 102 is formed to correspond to the shape and size of the body 110 so that the position of the body 110 inserted into the housing 100 can be firmly maintained. In this case, the body portion 110 can be inserted through the insertion opening.

The opening 101 is formed to penetrate through one side of the housing 100 and can communicate with the accommodation space 102. A part of the head part 120 connected to the body part 110 through the opening part 101 may be disposed outside the housing 100. [ Hereinafter, an oral care appliance 1 according to an embodiment will be described with reference to a state where the body 110 is installed inside the housing 100.

The body 110 may be located inside the housing 100. The body portion 110 may be formed of a module comprising respective component elements for operation of the mouth washer 1. [ For example, the body portion 110 may include various components such as a PCB circuit board for operation of the oral care appliance 1, an operation switch, a portable battery for supplying electric power, a charging means, and the like. However, this is merely an example, and the component elements included in the body portion 110 may include various kinds substantially applicable to the oral care cleanser 1. This should be omitted.

The head portion 120 can perform a brushing operation for cleaning the user's mouth by vibrating the vibrating portion 130. [ For example, the head portion 120 may be connected to a brush portion 180 (FIG. 9) described later to thereby transmit vibration into the user's mouth. Meanwhile, the head 120 may be connected to a fluid unit 140, which will be described later, to provide a path for fluid flow between the user's mouth and the body 110.

 One side of the head part 120 may be disposed in the housing space 102 of the housing 100 by being connected to the body part 110 and the other side may be located outside the housing 100 by passing through the opening part 101 . The head portion 120 may include a connecting member 121, a supporting member 122, and a tip 123. [

The connecting member 121 can connect the body 110 and the supporting member 122. In other words, the head part 120 can be connected to the body part 110 by the connecting member 121. One end of the connecting member 121 may be connected to the body 110 and the other end may be connected to the supporting member 122. The connecting member 121 may have a longitudinal direction extending from the body 110 toward the support member 122, for example, a longitudinal direction perpendicular to one end of the body 110. In this case, the connecting member 121 may be located inside the housing 100.

The support member 122 may be connected to the other side of the connection member 121 so as to be spaced apart from the body 110. The support member 122 may be spaced apart from the body 110 by a predetermined distance. The support member 122 may be located inside the housing 100. In this case, the support member 122 may have a larger area than the opening 101 so as not to be detached from the housing 100 through the opening 101.

The tip 123 may be connected to the support member 122 on one side and may extend in the longitudinal direction to pass through the opening 101. In other words, one side of the tip 123 connected to the support member 122 is located in the housing space 102 of the housing 100, and the other side of the tip 123 passes through the opening 101, Lt; / RTI >

The tip 123 may include a flow hole 1231 formed to penetrate along the longitudinal direction. In this case, the support member 122 may include a hollow formed through the outer surface so as to communicate with the flow port 1231. The flow port (1231) and the hollow are connected to the flow portion (140), thereby providing a flow path of the wastewater or the cleaning liquid.

The lubrication portion 140 can generate a flow of the fluid in the mouth washer 1. For example, the moving part 140 can change the flow pressure of the fluid to suck the wastewater in the user's mouth or spray the cleaning liquid into the user's mouth. The fluid section 140 may include a fluid pump 141, a flow tube 142, and a discharge tube 143.

The fluid pump 141 may provide a pressure for fluid flow. The fluid pump 141 may include, for example, a housing container and a motor for varying the pressure in the housing container. The flow tube 142 is connected to the receiving container and the flow port 1231 formed in the head portion 120, for example, the tip 123, thereby providing a flow path from the head portion 120 to the receiving container, 143 may be connected to the receptacle and the other may be connected to the outside of the body 110 to provide a fluid flow path from the receptacle to the outside of the body 110.

However, the configuration of the fluid flow through the above-described fluid portion 140 is merely an example, and the oral cleaner 1 according to one embodiment may be provided with various fluid flow methods.

The vibration unit 130 may vibrate the head unit 120 so that the brushing operation of the oral cleanser 1 is performed. The vibration unit 130 may be connected to the head unit 120 to vibrate the head unit 120 directly. In this case, since the vibration unit 130 does not directly contact the body 110, it is possible to minimize the transmission of vibration due to the vibration of the vibration unit 130 to the body 110. The vibration unit 130 may include an electric motor 131 that is operated by receiving power and a contact member 132 that is connected to the rotation axis of the electric motor 131.

The buffer unit 150 may be disposed between the head unit 120 and the housing 100 so as to attenuate vibration between the head unit 120 and the housing 100. For example, the buffer unit 150 is disposed in the opening 101 of the housing 100 so as to surround the tip 123 passing through the opening 101, so that an impact force due to the vibration of the tip 123 is transmitted to the housing 100 can be attenuated.

The light emitting portion 160 can irradiate light into the oral cavity of the user using the oral cleanser 1. The light emitting portion 160 is disposed between the body portion 110 and the head portion 120 and is capable of emitting light in the direction of the head portion 120. In this case, the head part 120 may be made of a transparent material so that light emitted by the light emitting part 160 can be transmitted. According to this structure, since the light emitting unit 160 is positioned inside the housing 100, it is possible to irradiate light into the oral cavity of the user while preventing damage caused by the use of the oral cleanser 1.

2 is a plan view of a head according to one embodiment.

Referring to FIG. 2, the head 120 according to an embodiment of the present invention is configured such that the vibration displacement of the head portion 120 located outside the housing 100 is less than the vibration displacement of the head portion 120 located in the housing 100 It can be big.

For example, the connecting member 121 of the head portion 120 can be provided with an exciting force by contacting the contact member 132 in accordance with the rotation of the electric motor 131. [ The supporting member 122 can transmit the vibration energy of the connecting member 121 to the tip 123 by connecting the connecting member 121 and the tip 123. [ In this case, the respective connection points of the tip 123 and the connecting member 121 to the support member 122 may be spaced from each other. For example, when the support member 122 has a circular cross-sectional shape, the tip 123 may be connected to the center of the support member 122, and the connection member 121 may be connected to the outside of the support member 122 have.

In other words, as shown in Fig. 2, the vibrating portion of the connecting member 121 by the contact member 132 can be eccentric from a virtual axis Y passing through the center of the opening 101 (see Fig. 1). The vibration displacement A2 of the end portion of the tip 123 is larger than the vibration displacement A1 of the vibration portion of the connecting member 121 because the tip 123 has a length longer than the length of the connecting member 121 have. As a result, the head portion 120 can improve the vibration displacement at a portion connected to the brush portion 180 (Fig. 9). That is, the vibration of the tip of the tip 123 is maximized, so that the brushing operation for cleaning the user's teeth can be effectively performed. In addition, since the magnitude of the force transmitted to the connection member 121 is limited by the contact member 132, the vibration transmitted to the user holding the mouth washer 1 can be alleviated.

On the other hand, when the connection member 121 and the tip 123 are connected to the support member 122 so as to be spaced apart from each other, fluid flow through the tip 123 is prevented from being interfered by the connection member 121 .

3 is a plan view of the head according to one embodiment.

Referring to FIG. 3, the head 120 'according to an embodiment is configured such that the end portion of the tip 123' is curved in the longitudinal direction so as to increase the vibration displacement of the end portion of the tip 123 ' Plane. As shown in FIG. 3, when the end of the tip 123 'includes a curved surface, the vibration displacement A2 at the end of the tip 123' may increase by the length of the curved surface. In other words, the distance of the end of the eccentric tip 123 'with respect to the imaginary axis Y may increase. Therefore, the vibration displacement of the end of the tip 123 'by the excitation force can be further improved.

FIG. 4 is a perspective view of a head part and a body part according to an embodiment, and FIG. 5 is a side view of a head part and a body part according to an embodiment.

4 and 5, the head part 120 and the body part 110 according to the embodiment can attenuate the impact force transmitted to the body part 110 according to the vibration of the head part 120 . The body 110 may include a slit 111 formed on the outer surface and a damping member 112 located within the slit 111. [

The slit 111 may be formed through a part of the outer surface of the body 110. In other words, the slit 111 may be in the form of a groove that is formed to penetrate the inner surface from the outer surface of the body portion 110.

 One side of the damping member 112 is fixed to the outer surface of the body 110 and the other side of the damping member 112 can be extended corresponding to the shape of the slit 111. The other side of the damping member 112 is located in the slit 111, so that it can move in the slit 111 by an external force.

The connecting member 121 may be connected to the other side of the damping member 112. In this case, the receiving member 124 for receiving the electric motor 131 may be connected to the connecting member 121. The housing member 124 is formed in a shape corresponding to the electric motor 131 so as to accommodate the electric motor 131 and is connected to the damping member 112 and the connecting member 121 on both sides, And the damping member 112 can be connected to each other.

The slit 111 and the damping member 112 may be provided on the body 110 in pairs. For example, as shown in FIG. 4, a pair of slits 111 are formed to face each other on the opposite side of the outer surface of the body 110, and a pair of the damping members 112 can be located in the respective slits 111 have. In this case, the housing member 124 is connected to the body portion 110 through the pair of dampers 112, thereby ensuring a stable support state.

When the connecting member 121 vibrates in accordance with the operation of the electric motor 131, the damping member 112 vibrates in the slit 111 in response to the vibration of the connecting member 121, The transmitted vibration can be attenuated. In other words, the damping member 112 serves as a damping material absorbing the vibration energy transmitted from the connecting member 121 to the body 110, thereby reducing vibration generated in the body 110 .

When the electric motor 131 is housed in the housing member 124, the electric motor 131 does not directly contact the body 110, but contacts the head 120 only, It can vibrate. According to this structure, since the vibration energy due to the tremble of the electric motor 131 itself is not transmitted directly to the body portion 110 but is transmitted to the body portion 110 through the damping member 112, 110 can be reduced.

6 is a perspective view showing a vibrating part according to an embodiment.

Referring to Fig. 6, the contact member 132 can come into contact with the connecting member 121, thereby causing vibration of the head portion. The contact member 132 is disposed between the body portion 110 and the support member 122 of the head portion 120 and can selectively contact the connection member 121 in accordance with the rotation.

As shown in FIG. 6, the contact member 132 may be formed to have one side protruding. In other words, the contact member 132 may have a cross-sectional shape in which a part of the outer side protrudes from the center of rotation. In this case, the contact member 132 can contact the connecting member 121 through the protruded outer surface. According to this structure, the head portion 120 can be vibrated while the outer surface protruding along the rotation of the contact member 132 repeatedly contacts the connecting member 121. As a result, the vibration generated in the connection member 121 by the contact member 132 can be transmitted to the tip 123 through the support member 122. [ However, the shape of the contact member 132 shown in the figure is merely an example, and various shapes capable of performing the same function can be applied to the contact member 132. [

The vibration unit 130 (FIG. 1) can adjust the period of vibration of the head unit. Specifically, by controlling the rotational speed of the electric motor in accordance with the set control conditions, the contact period of the connecting member 121 and the contact member 132 can be adjusted. For example, when a higher intensity of vibration is required, by increasing the rotational speed of the electric motor 131, the frequency according to the vibration of the head 120 can be increased, The frequency corresponding to the vibration of the head 120 can be reduced by reducing the rotational speed of the electric motor 131 when required.

7 is a perspective view showing a buffer unit according to one embodiment.

Referring to FIG. 7, the buffer unit 150 may attenuate the impact force transmitted to the housing 100 according to the vibration of the tip 123. The buffer portion 150 may be disposed between the opening portion 101 and the tip. For example, the buffer unit 150 may include a hollow formed through the inside thereof. A portion of the tip 123 located in the opening 101 may be inserted into the hollow of the buffer unit 150. The buffer unit 150 is made of an elastic material, and can function as a buffer material between the tip 123 and the housing 100. In addition, the buffer unit 150 prevents the tip 123 from colliding with the housing 100 while vibrating, thereby preventing the housing 100 and the tip 123 from being damaged. As a result, the buffer unit 150 can reduce the unpleasantness felt by the user holding the housing 100 due to the vibration of the housing 100.

The buffer portion 150 is formed in a shape and size corresponding to the opening portion 101 so that the space between the tip portion 123 and the opening portion 101 can be sealed. According to such a structure, the buffer unit 150 prevents the foreign substances from flowing into the housing 100 through the opening 101 between the use of the oral cleanser, thereby preventing the parts inside the oral cleanser 1 from being damaged can do.

8 is a plan perspective view of an oral cleanser in accordance with one embodiment.

8, an oral cleanser according to one embodiment may include a shock absorbing member 170 disposed between a housing 100 and a body portion 110. The shock absorbing member 170 may be provided on the inner surface of the housing 100 to serve as a shock absorber for absorbing vibration of the body 110 inserted into the housing space of the housing 100. The shock absorbing member 170 may be, for example, a foam of a soft elastic material, for example, a porous elastic material including an elastic polymer such as polyurethane. In this case, when the impact force due to the vibration of the body portion 110 is transmitted, the impact absorbing member 170 absorbs the impact while being compressed. When the impact force is removed, the impact absorbing member 170 is restored to its original shape and can repeatedly absorb the impact force. However, this is merely an example, and the shock absorbing member 170 may include various materials capable of absorbing impact.

As a result, the impact absorbing member 170 absorbs the impact transmitted to the housing 100 by the body 110, thereby reducing the inconvenience experienced by the user holding the housing 100. On the other hand, when the housing 100 receives an impact, the impact absorbing member 170 may mitigate the impact transmitted to the body 110, thereby preventing the body 110 from being damaged.

9 is a perspective view showing a brush part according to an embodiment.

Referring to FIG. 9, a brush 180 may be included in the mouth of a user according to an embodiment to clean a mouth of a user. The brush part 180 is connected to the tip 123, so that the brush part 180 receives the vibration due to the vibration of the tip 123 and can vibrate in the user's mouth. The brush part 180 extends along the longitudinal direction, thereby maximizing the movement of the vibration transmitted from the tip 123. [ In other words, the vibration transmitted from the connecting member 121 is transmitted to the brush portion 180 through the tip 123, so that the displacement due to the vibration of the brush portion 180 can be further increased.

The brush portion 180 may include a hollow portion 181 formed in the longitudinal direction. In this case, by inserting the tip 123 into the hollow portion 181, the head portion and the brush portion 180 can be connected. In this case, the hollow portion 181 and the tip 123 may be provided with engageable members.

A plurality of through holes 182 communicating with the flow port 1231 may be formed at one side of the brush portion 180. The through hole 182 can communicate with the flow port 1231 through the hollow portion 181 when the tip 123 is formed with a flow port 1231 for fluid flow. Each of the through holes 182 may be provided with a plurality of brushes for cleaning the teeth by contacting the user's teeth. In this case, since the brush and the through-hole 182 are formed in the same direction, tooth cleaning through the brush and injection of the fluid through the through-hole 182 can be performed simultaneously.

In summary, the oral cleanser according to one embodiment can achieve effective oral cleansing by increasing the vibration transmitted to the user's mouth through the head portion. In addition, since the vibrations transmitted from the head portion to the body portion are attenuated through the attenuating member, and the vibrations transmitted to the housing through the buffer portion and the shock absorbing member are attenuated in a double manner, the inconvenience due to the vibration felt by the user holding the housing Can be reduced.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. For example, it is contemplated that the techniques described may be performed in a different order than the described methods, and / or that components of the described structures, devices, and the like may be combined or combined in other ways than the described methods, Appropriate results can be achieved even if they are replaced or replaced.

Therefore, other implementations, equivalents to other embodiments and the claims are also within the scope of the following claims.

1: Oral cleanser
100: Housing
110:
120:
130:
140:
150:
160:
170: shock absorbing member
180: Brush part

Claims (12)

A housing including an opening formed in one side;
A body positioned within the housing;
A head part connected to the body part at one side and to the outside of the housing at the other side; And
And a vibration part connected to the head part to vibrate the head part,
Wherein the vibration displacement at the other end of the head portion located outside the housing is larger than the vibration displacement of the head portion located within the housing.
The method according to claim 1,
Wherein:
A connecting member connected to the body part at one side and extending in the longitudinal direction, the connecting member being connected to the vibrating part;
A supporting member connected to the other side of the connecting member so as to be spaced apart from the body portion; And
And a tip connected to the support member and extending longitudinally to pass through the opening.
3. The method of claim 2,
Wherein a center of a connection portion of the tip and the connection member with respect to the support member is spaced apart from each other.
3. The method of claim 2,
Wherein the contact portions of the vibrating portion and the connecting member are eccentric from an imaginary axis passing through the center of the opening.
3. The method of claim 2,
The body portion
A slit formed on the outer surface; And
Wherein one side is fixed to the body part and the other side is a damping member located in the slit,
Wherein the connecting member is connected to the damping member.
6. The method of claim 5,
Wherein the damping member vibrates in the slit in accordance with the vibration of the connecting member to attenuate vibration transmitted to the body.
3. The method of claim 2,
The vibrating unit may include:
An electric motor, and a contact member connected to a rotating shaft of the electric motor,
Wherein the contact member selectively contacts the connecting member in accordance with rotation of the electric motor.
8. The method of claim 7,
And a receiving member connected to the connecting member,
Wherein the electric motor is fixed to the housing member.
3. The method of claim 2,
Wherein an end of the tip located outside the housing comprises a curved surface that is bent relative to the longitudinal direction of the tip.
3. The method of claim 2,
Further comprising a buffer portion disposed between the opening and the tip, for damping an impact force due to vibration of the tip.
3. The method of claim 2,
Further comprising a brush portion coupled to the tip, the brush portion having a brush for cleaning a user ' s mouth.
The method according to claim 1,
Further comprising an impact absorbing member disposed between the housing and the body portion, the impact absorbing member reducing the impact force due to the vibration of the body portion.

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