Abstract:
A portable interdental toothbrush according to the present invention can be earned conveniently since a cleaning solution tube is present in a sealed state when carried without using it, which provides convenience in use, simple structure, easy manufacture, and low production cost, thereby allowing any user to use it, which promotes the dental and oral health for citizens.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
       [0001]    This application claims the benefit of International Application No. PCT/KR2015/003664, filed on Apr. 13, 2015, based on Korean Patent Application No. 10-2014-0016234, filed on Feb. 12, 2014, and Korean Patent Application No. 10-2014-0016931, filed on Feb. 13, 2014, with the Korean intellectual Property Office, the disclosures of which are herein incorporated by reference in their entireties. 
     
    
     BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to a portable interdental toothbrush and is more particularly concerned with a portable interdental toothbrush in which a user can carry for portable use during travel or outing so as to clean and sterilize foreign materials and plaque that fit between teeth after meals; a cleaning solution tube for easily supplying a cleaning solution to the toothbrush in a state of carrying the interdental toothbrush is detachably attached, the cleaning solution is supplied to the interdental toothbrush via the cleaning solution tube, it is possible to separate the cleaning solution tube, replenish the cleaning solution and attach it again; its use is convenient, the structure becomes simple, and manufacturing cost is low. 
         [0004]    2. Description of the Related Art 
         [0005]    In general, the interdental toothbrush has small brush-shaped bristles for cleaning spaces between the teeth mounted on the end of the handle. They are orally hygiene instruments used to clean the oral cavity by washing interdental spaces using putting in and pulling out motions of the brush in the interdental space gaps. Use of the interdental toothbrush facilitates removal of food-residue and plaque of hard-to-reach areas of usual toothbrushes, sterilization after dental treatment such as scaling, prevention of plaque alter smoking, and cleaning of orthodontic instruments such as braces to maintain oral hygiene. 
         [0006]    However, looking at the actual state of use of the current interdental brush, there are problems that the cleaning is conducted only using the brush and thus gums become stimulated, bleeding occurs frequently and the ability to remove food-residue and plaque becomes insufficient. Further, if interdental brushes are continuously used, there is an unpleasant smell front the brush due to a had cleanliness, particularly, the growth of bacteria. 
         [0007]    In an attempt to solve the above-mentioned problems, as shown in  FIG. 1 , there has been developed, a toothbrush in which a lid  120  containing a cleaning solution  140  is coupled inside the toothbrush  110  coupled with bristles  130 , and each time the user uses it, the toothbrush  110  is immersed in the cleaning solution so that the toothbrush  110  is soaked with the cleaning solution  130 . However, this method has disadvantages in that the cleaning solution  140  is stored in the lid  120  of the toothbrush  110  and thus the cleaning solution can be discharged outside if the lid  120  is open due to the user&#39;s carelessness. Also, care should be taken for preventing loss of the cleaning solution stored in the lid  120  when using the toothbrush  110 . Further, it is troublesome to repeat the motions of putting in and pulling nut the toothbrush  110  in the lid  120  every time the user tries to soak the toothbrush  110  in the cleaning solution. 
         [0008]    To solve the above problems, Korean Patent No. 10-0468075 titled “An interdental toothbrush provided with a cleaning solution” has been suggested. The interdental toothbrush disclosed in this patent comprises, as shown in  FIG. 2 , a case  40  having both ends open, a storage tank  30  installed in the case  40 , on one side of which is formed a discharge hole  32 , and the other side of which is open, a pleated tube  70  coupled to the open outer circumferential face of the storage tank  30  and to a check valve  80  joined to an end thereof a spring  55  installed on the outer circumferential face of the discharge hole  32 , a coupling socket  50  installed on the outer circumferential face attic discharge hole  32  and having a screw part on the outer circumferential face thereof, a nozzle  60  screw-coupled to the discharge hole  32 , an end portion of which is split into upper and lower parts, and having a cone-shaped discharge hole inside and a slanted bump  62  on an outer circumferential face thereof, a fixing ring  65  coupled to the split outer circumferential face of the nozzle  60  and contacted with a side surface of the coupling socket  50 , and a nozzle cap  90  engaged in the screw portion formed on the coupling socket  50  and having a brush  95  assembled on the front surface thereof and a couple of injection holes  92  formed therein. This interdental toothbrush is effective in eliminating the inconvenience of handling cleaning solution of the prior art, however, the structure is complicated and the manufacturing cost is high, so it is not practical. Further, when the cleaning solution is all used up, the storage tank  30  should be replenished with a new cleaning solution, however, it is impossible to replenish the cleaning solution in the storage tank  30 , which makes it impossible to continuously use the interdental toothbrush purchased at a high price. 
       SUMMARY 
       [0009]    It is an object of the present invention to solve the above-described problems encountered with the prior arts and to provide a portable interdental toothbrush in which a cleaning solution containing fluoride is received in a sealed state and thus it is convenient to carry the toothbrush and ensure activity; the cleaning solution can be discharged during use by cutting an assembly tip of a cleaning solution tube storing the cleaning solution stored in a sealed state; the assembly groove for the cut assembly tip of the cleaning solution tube to be assembled is formed on the bottom surface, which enables the cleaning solution to easily supply to a brush of the brush body and provides simple structure, low manufacturing cost, and convenience in use. 
         [0010]    Another object of the present invention is to solve the above-described problems and to provide a portable interdental toothbrush capable of replenishing the cleaning solution containing fluoride after use, thereby allowing long term use and convenience in use. 
         [0011]    The above objects of the present invention is achieved by a portable interdental toothbrush according to the present invention comprising: a cleaning solution tube in which a cleaning solution containing fluoride is received in a sealed state to carry it conveniently, and a sealed assembly tip is formed to be cut out for use and a brush body to which a brush is fixed, an inflow hole is formed on the edge of the brush, and an assembly groove that the assembly tip of the cleaning solution tube is assembled is formed on a bottom surface, wherein, during use, the sealed assembly tip of the cleaning solution tube is cut, the cut assembly tip is inserted in the assembly groove on the bottom surface of the brush body, the cleaning solution stored in the cleaning solution tube is discharged through the inflow hole of the brush body to wet the brush, thereby the cleaning solution is supplied. 
         [0012]    The above objects of the present invention is achieved by a portable interdental toothbrush according to the present invention comprising: a cleaning Solution tube filled of a cleaning solution containing fluoride to enable a filling, thus allowing a long-term use, which tube is operated so as to discharge a small amount of the filled cleaning solution upon pressing a push button, and an assembly tip is formed on one end thereof; and a brush body to which a brush is fixed, an inflow hole is formed on the edge of the brush, and an assembly groove to which the assembly tip of the cleaning solution tube is assembled is formed on a bottom surface, wherein, the assembly tip is inserted in the assembly groove on the bottom surface of the brush body, the cleaning solution stored in the cleaning solution tube is discharged through the inflow hole of the brush body to wet the brush, thereby the cleaning solution is supplied. 
         [0013]    A portable interdental toothbrush according to the resent invention can be carried conveniently since a cleaning solution tube stays in a sealed state when carried without using it, which provides convenience in use, simple structure, easy manufacture, and low production cost, thereby allowing any user to use it, which promotes the dental and oral health for citizens. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    The above and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
           [0015]      FIG. 1  is a longitudinal cross-sectional view of a conventional interdental toothbrush. 
           [0016]      FIG. 2  is an exploded perspective view of another conventional interdental brush. 
           [0017]      FIGS. 3 and 4  are perspective views of a portable interdental toothbrush in accordance with the lint embodiment of the present invention during carrying and during use, respectively. 
           [0018]      FIG. 5  is an exploded perspective view of a portable interdental toothbrush in accordance with the first embodiment of the present invention. 
           [0019]      FIGS. 6 and 7  are longitudinal cross-sectional views of an assembly tip of a cleaning solution tube when it is carried and when it is assembled, respectively. 
           [0020]      FIG. 8  is a longitudinal cross-sectional view of a portable interdental toothbrush in accordance with the second embodiment of the present invention. 
           [0021]      FIG. 9  is a longitudinal cross-sectional view of a portable interdental toothbrush in accordance with the third embodiment of the present invention. 
           [0022]      FIG. 10  is an exploded perspective view of a portable interdental toothbrush in accordance with the fourth embodiment of the present invention. 
           [0023]      FIG. 11  is a perspective view of a portable interdental toothbrush in accordance with the fourth embodiment of the present invention. 
           [0024]      FIG. 12  is a cross-sectional view along I-I line of  FIG. 11 . 
           [0025]      FIG. 13  is a longitudinal cross-sectional view showing an operation state of a button unit of a portable interdental toothbrush in accordance with the fourth embodiment of the present invention. 
           [0026]      FIG. 14  is an operation view illustrating an operation of a portable interdental toothbrush in accordance with an embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0027]    Hereinafter, the configuration and operation of preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, in the case of assigning the reference numerals to the components of the drawings, it should be noted that, with respect to the same components, the same reference numerals are used even in different drawings. 
         [0028]    As shown in  FIGS. 3 and 5 , a portable interdental toothbrush A according to the first embodiment of the present invention comprises: a cleaning solution tube  1  in which a cleaning solution S containing fluoride is received in a sealed state and thus it is convenient to carry the toothbrush, and which tube is formed to enable the sealed assembly tip  11  to cut during use; and a blush body  2  to which a brush  21  is fixed, art inflow holes  22  are formed on the edge of the brush  21 , and an assembly groove  23  that the assembly tip  11  of the cleaning solution tube  1  is assembled is formed on a bottom surface. 
         [0029]    As shown in  FIG. 3 , the cleaning solution tube  1  is made of a transparent vinyl for easy manufacture. An assembly tip  11  is configured such that an assembly protrusion  11   a  is formed in the middle of the assembly tip  11 , and a cutting groove  12  is formed for easy cutting around the assembly tip  11 , thereby when pulling a protruded plate  13  of the upper part, the cutting groove  12  is cut and then an assembly portion  11   c  which is weakly coupled to an upper surface  11   b  of the assembly tip  11  is torn and the upper surface  11   b  is opened. Protrusions  11   bb  having a concavo-convex shape are formed on the cut upper surface  11   b  and are engaged with a side surface of an opening/closing plate  24  inserted into the brush body  2  to be described later, to prevent the rotation of the opening and shutting plate  24 . An extended plate portion  14  which can be used as a grip is formed under the cleaning solution tube  1 , thereby allowing insertion of an advertisement or other necessary contents. In this embodiment, the cleaning solution tube  1  is disposable to allow hygienic and convenient use. 
         [0030]    Another embodiment of the cleaning solution tube  1  is a structure which does not need the opening opening and shutting plate  24 , and the upper surface  11   b  of the assembly tip  11  is covered with a thin vinyl in a state where the cleaning solution S is filled, a perforating portion is marked at a location on the vinyl communicating with the inflow holes  22  of the brush body  2 , thereby allowing a user to perforate the perforating portion and insert into the assembly groove  23  of the brush body  2  to use. While it is not used, the brush body  2  may be rotated Slightly to close the inflow holes  22 . 
         [0031]    The brush body  2 . utilizes an elastic silicon material. The brush  21  is fixed to the middle at an upper part, and four inflow holes  22  for communicating with the assembly groove  23  and flowing the cleaning solution S are farmed on the edge of the brush  21 . An assembly groove  23  is formed in the bottom surface of the brush body  2 , and a ring shape assembly groove  23   a  is formed in the middle of the assembly groove  23  so that the assembly protrusion  11   a  is inserted and fixed. The opening and closing plate  24  is closely adhered to the bottom surface of the assembly groove  23  to perform opening and shutting operations of the inflow holes  22 . 
         [0032]    Grooves  24   c  for engaging with protrusions of the upper surface  11   b  are formed on the side of the opening and shutting plate  24  to fix the opening and shutting plate  24  without rotation. Four communicating holes  24   a  for communicating with the inflow holes  22  and press-fit protrusions  24   b  protruded between the communicating holes  24   a  are funned on the opening and shutting plate  24  such that the press-fit protrusions  24   b  close the bottom surface of the inflow holes  22  rotating, together when the brush body  2  rotates to prevent the cleaning solution S from discharging. 
         [0033]    The reference numeral  3  which is not described is a cover  3  for protecting the brush  21 . 
         [0034]    In this embodiment, the brush body  2  is made of a silicon material to enable a repetitive use. The operational effect of the portable interdental, toothbrush A according to the present invention having the above configuration will be described in detail below. 
         [0035]    When it is not used, but carried, the cleaning solution tube  1  and the brush body  2  are stored and carried in a separately separated state. When the protruded plate  13  of the cleaning solution tube  1  is pulled if the use is required, the cutting groove  12  formed Wong the outline of the assembly tip  11  is cut and concurrently the outline surface of the assembly tip  11  is cut, and further the upper surface  11   b  of the assembly tip  11  is torn, thereby the cleaning solution S is opened in a usable state. 
         [0036]    In the state as described above, if the open assembly tip  11  of the cleaning solution tube  1  is inserted in the assembly groove  23  of the lower part of the brush body  2 , this forces the assembly protrusion  11   a  of the assembly tip  11  to be mounted and inserted in a contracted state, and then again assembled in an expanded state while inserted in the ring shape assembly groove  23   a  formed in the middle of the assembly groove  23 , thereby the assembly of the cleaning solution tube  1  and the brush body  2  is completed. In a state where the assembly of the cleaning solution tube  1  and the brush body  2  is completed, if the brush body  2  is inclined downward, the cleaning solution S stared in the cleaning solution tube  1  flows downward through the inflow holes  22  to wet the brush  21 , thereby the cleaning solution S is wetted on the brush, which enables the portable interdental toothbrush A to use. By doing so, it is possible to easily use the portable interdental toothbrush. After use, if the brush body  2  is rotated slightly, the inflow holes  22  are closed to prevent the cleaning solution S from discharging, which allows the storage of the portable interdental toothbrush. 
         [0037]      FIG. 8  is a schematic longitudinal cross-sectional view of a portable interdental toothbrush in accordance with the second embodiment of the present invention. While the cleaning solution tube  1  is described as disposable in the first embodiment, a repeatedly usable structure of the portable interdental toothbrush A is suggested in the manner in which a lower assembly tip  15  having an injection hole  15   a  is formed in a lower part of the cleaning solution tube  1 , a sealing cover  4  made of a silicon material and having an upper assembly groove portion  41  formed in an upper part is formed to be inserted into and sealed with the lower assembly tip  15  such that, when the cleaning solution S inserted in the cleaning solution tube  1  is used up, the cleaning solution S can be replenished after taking off the sealing cover  4  and the sealing cover  4  is inserted and fixed again. 
         [0038]      FIG. 9  is a schematic longitudinal cross-sectional view of a portable interdental toothbrush A in accordance with the third embodiment of the present invention, and this also has a structure capable infusing by repeatedly injecting the cleaning solution S. The brush body  2  has the same structure as in the above-mentioned embodiment and thus the detailed description thereof is omitted. The cleaning solution tube  1  has an improved structure to use it conveniently. 
         [0039]    The cleaning solution tube  1  has a pipe type of a syringe shape in which the cleaning solution S is filled, one end of which is formed of an assembly tip  11  which can he inserted into the assembly groove  23  of the brush body  2 , and the other end is open. A pressing piston unit  5  for pressing the filled cleaning solution S to the assembly tip  15  is formed on the other open end. The pressing piston unit  5  includes a casing  51  coupled to the other end of the cleaning solution tube  1 ; a push button  53  Which is placed inside the casing  51  and one end of which is protruded through an assembly hole  51   a  of the one end of the casing  51  and supported elastically by a spring  52 ; and a pressing shah  54  Which is fixed to an inside end portion of the push button  53  and interlocked with an operation of the push button  53  and in which a pressing plate  55  for pressing the cleaning solution S is attached to one end thereof. 
         [0040]    Accordingly, upon pressing the protruded end of the push button  53 , the pressing plate  55  moves to press the filled cleaning solution  5 , the pressed cleaning solution S is discharged through the assembly tip  11  and supplied to the brush  21  through the inflow holes  22  of the brush body  2 . When the cleaning solution S is used up, the cleaning solution S is replenished through the assembly tip  11  alter taking off the brush body  2 , which allow repeated use. 
         [0041]    As shown in  FIGS. 10-12 , a portable interdental toothbrush A according to the fourth embodiment of the present invention comprises: a cleaning solution tube  1  in which a cleaning solution S containing fluoride is filled in the inside and, upon pressing a push button for use, the cleaning solution S is discharged through a discharge hole  15  of an assembly tip  11  formed on one end, and a brush body  2  to which a brush  21  is fixed, inflow holes  22  are formed on the edge of the brush  21 , and an assembly groove  23  to which the assembly tip  11  of the cleaning solution tube  1  is assembled is formed on a bottom surface. 
         [0042]    As shown in  FIG. 10 , the cleaning solution tube  1  is made of transparent synthetic resins; however, it may also be made of semi-transparent or opaque synthetic resins. 
         [0043]    The cleaning solution tube  1  includes a tubular shape tube body  10  which is filled with the cleaning solution S therein, one end of which is formed of the open assembly tip  11 , and the other end is open; and a cleaning, solution-pressing unit  120  assembled with the other open end for pressing the cleaning solution S in the direction of the assembly tip  11 . 
         [0044]    In the assembly tip  11  formed on one end of the tube body  10 , a discharge hole  15  is formed in a center, an assembly protrusion  16  is formed in the middle of outer surface, protrusions  11   d  having a concavo-convex shape are formed on an upper surface of the assembly tip  11  which engage with the sides of the opening and shutting plate  24  inserted to the brush body  2 , which will be described later, to prevent the opening and shutting plate  24  from rotating. 
         [0045]    The other end of the tube body  10  is open and the cleaning solution pressing unit  120  is fixed thereto. 
         [0046]    The cleaning solution-pressing unit  120  includes: a casing  121  coupled to the other open end of the tube body  10 ; a push button  122  in which one end thereof is located inside the casing  121  and the other end is protruded through the assembly hole  121   a  of one side end portion of the casing  121 ; a rotating member  123  for contacting the one end of the push button  122  located inside the casing  121  and interlocked with an operation of the push button  122 ; a spring  124  for supporting the rotating member  123 ; a rotating rod  125  which is inserted and fixed inside the rotating member  123  and rotating together with the rotation of the rotating member  123 , in which a pressing shall insertion hole  125   a  for a pressing shaft  126  to be inserted and fixed is formed; an inner casing  127 , one end of which is closed and a shaft fixing hole  127   a  for a pressing shaft  126  to be inserted and fixed thereto is formed, and the other end of which is open and one end of the rotating rod  125  is placed adjacent thereto; a pressing shall  126  which is inserted into the shall fixing hole  127   a  of the inner casing  127  to be inserted into the pressing shaft insertion hole  125   a  of the rotating rod  125  and in which a pressing plate  128  is formed on one end; and a pressing plate  128  fixed to one end of the pressing shall  126  and placed inside the tube body  10  to press the cleaning solution S in the direction of the assembly tip  11 . 
         [0047]    One end of the casing  121  is fixed to the open end of the tube body  10 , and an assembly hole  121   a  is perforated on the other end. Inside of the lower side end portion of the casing where the width is narrow, rotation guide protrusions  121   b  protruded inwardly haying an inclined surface filmed on one end thereof are formed with regular intervals. 
         [0048]    The push button  122  has a tubular shape having a hollow, one end of which is protruded outward through the assembly hole  121   a  of the casing  121 , a sawtooth contact portion  122   a  having an overlapping mountain shape is formed on the other end, and an engaging protrusion  122   b  is formed in the middle. Protrusion guide portions  122   c  protruded outward with regular intervals and pointed in the direction of the sawtooth contact portion  122   a  are formed on an outside surface of the end on which the sawtooth contact portion  122   a  of the push button  122  is formed. 
         [0049]    In the rotating member  123 , four half-sawteeth  123   a  which contact and rotate with the sawtooth contact portion  122   a  of the push button  122  are formed on the outside surface with regular intervals, four fixing grooves  123   b  for fixing the assembly protrusions  125   d  of the extended pipe portion  125   c  of the rotating rod  125  are formed inside with regular intervals, and a spring contact surface  123   c  is formed on a surface adjacent to the spring  124 . 
         [0050]    In the rotating rod  125 , a spring contact plate  125   b  for contacting the spring  124  is formed on one end, a pressing shaft insertion hole  125   a  is formed as a screw groove on a center of the spring contact plate  125   b,  the extended pipe portion  125   c  extended lengthily is formed in the rear of the spring contact plate  125   b,  an assembly protrusion  125   d  is formed outside the extended pipe portion  125   c,  and the assembly protrusion  125   d  is inserted into the fixing groove  123   b  of the rotating member  123 , whereby the rotating member  123  and the rotating rod  125  rotationally operate together. 
         [0051]    A thread  126   b  is formed outside of an extended rod  126   a  extended lengthily for screw-coupling to the pressing shall insertion hole  125   a  of the rotating rod  125 , which makes one end of the pressing shaft  126  to screw-couple to the rotating rod  125 , and a protruded assembly portion  126   c  for attaching and detaching the pressing plate  128  is formed on the other end of the pressing shaft  126 . 
         [0052]    The inner casing  127  is rotationally inserted into an inner surface of the tube body  10  and supports the rotating rod  125  to prevent from separating forwardly. On a contact surface adjacent to the rotating rod  125 , a shaft fixing hole  127   a  having an upper and lower cut circular shape which is the same as the cross section of the extended rod  126   a  of the pressing shaft  126  on the center of the contact surface  127   b  is formed and it rotates equally when the pressing shaft  126  rotates. 
         [0053]    The pressing plate  128  adheres closely to the inside of the tube body  10  to press the cleaning solution S in the direction of the brush body  2 . 
         [0054]    The brush body  2  is made of an elastic silicon material. The brush  21  is fixed on the center of the upper part, four inflow holes  22  for communicating an assembly groove  23  of the lower part and flowing the cleaning solution S are formed on the periphery of the brush  21 . The assembly groove  23  is formed on a bottom surface, and a ring shape assembly groove  23   a  for the assembly protrusion  16  formed in the middle of the assembly tip  11  to be fixed when the assembly tip  11  formed on one end of the tube body  10  is inserted is formed in the middle of the assembly groove  23 . 
         [0055]    An opening and shutting plate  24  is closely adhered to the bottom surface of the assembly groove  23  to perform opening and shutting operations of the inflow holes  22 . Grooves ( 24   c ) for engaging with protrusions  11   d  of the upper surface are formed on a side surface of the opening and shutting plate  24  to fix the opening and shutting plate  24  without rotation. On the opening and shutting, plate  24  are formed four communicating holes  24   a  for communicating with the inflow holes  22  and press-fit protrusions  24   b  protruded between the communicating holes  24   a,  whereby the press-fit protrusions  24   b  close the bottom surfaces of the inflow holes  22  which are rotated together during rotation of the brush body  2  to prevent the cleaning solution S from discharging. 
         [0056]    The operational effect of the portable interdental toothbrush A according to the present invention having the above configuration will be described below in 
         [0057]    In a state where the cleaning solution s is filled, the push button  122  is pressed to use the portable interdental toothbrush A. Then, the push button  122  descends, the sawtooth contact portion  122   a  of the lower part descends to press the half-sawteeth  123   a  of the rotating member  123  which is point-contacted. The half-sawteeth  123   a  rotate in the direction of the arrow to plane-contact with the descended sawtooth contact portion  122   a  (See  FIG. 12 ). When the rotating member  123  rotates, the rotating rod  125  connected integrally thereto rotates as a matter of course. Then, the pressing shaft  126  screw-coupled to the pressing shall insertion hole  125   a  of the rotating rod  125  to move the pressing plate  128  fixed to one end of the pressing shaft  126  forward in the direction of the cleaning solution S. The pressed cleaning solution S is supplied to the brush  21  through the inflow holes  22  of the brush body  2 . 
         [0058]    If the pressure on the push button  122  is released in the state that the half-sawteeth  123   a  and the sawtooth contact portion  122   a  are surface-contacted, the push button  122  is expelled by the spring  124  to one side and moved upward with the guidance of the rotation guide protrusions  121   b  formed on the inner snake of the casing  121 . By the repetition of the above-described operation, the push button moves upward and downward to discharge the cleaning solution S to the brush body  2 . 
         [0059]    If the cleaning solution S is used up, the brush body  2  is separated kali the cleaning solution tube  1  easily by pulling out the brush body  2 . After the cleaning solution S is replenished through the discharge hole  11   a  of the assembly tip  11  of the cleaning solution tube  1 , it may be continuously used. 
         [0060]    It is possible to manufacture the same products as the portable interdental toothbrush in accordance with the present invention repeatedly in the manufacturing field of the interdental toothbrush. Accordingly, the present invention possesses industrial applicability. 
         [0061]    Although the specific embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the an will appreciate that various modifications, additions and substitutions may be made to the invention without departing from the scope and spirit of the invention as disclosed in the accompanying claims.