Patent Publication Number: US-2016235507-A1

Title: Interdental cleaning apparatus using both hands

Description:
CROSS REFERENCES 
     This application claims priority to and the benefit of Korean Patent Application Nos. 10-2015-0023609 and 10-2015-0155077 respectively filed in the Korean Intellectual Property Office on Feb. 16, 2015 and Nov. 5, 2015, the entire contents of which are incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an interdental cleaning apparatus using both hands, and more particularly, to an interdental cleaning apparatus using both hands, which supports dental, floss with a dental floss supplying stick and a dental floss collecting stick instead of fingers, wherein the dental floss supplying stick provides unused dental floss and the dental floss collecting stick collects used dental floss, a length of the dental floss supported by being connected to the dental floss supplying stick and the dental floss collecting stick is controllable, such that a user is able to care teeth with various flossing motions as well as to control the tension of dental floss easily by utilizing feeling of the user&#39;s hand as it is. 
     2. Discussion of the Related Art 
     Dental floss, a sort of oral care products, has a thin thread shape, and is a tool for caring portions between teeth intensively where it is hard to care with a tooth brush only. The dental floss has no side effects of opening teeth, which is different from using a toothpick, and enables to remove plague between teeth efficiently, and accordingly, it helps to prevent dental calculus. 
     An interdental brush, another sort of oral care products, is designed to remove food remains or dental calculus formed in a triangle zone between two teeth and gum, but the dental floss is designed to remove food remains or dental calculus between teeth. 
     In addition, the interdental brush itself must be cleaned for repetitive use. However, the dental floss is cut as much as it is needed whenever it is used and discarded after using, it is portable and convenient to be used regardless of place. 
     Commonly, the dental floss is contained in a case considering sanitation, and therefore, it is easy to carry, except for disposable one. The dental floss is designed to be used by being cut as much as it is needed or by being tied to a holder. 
     Such a conventional case for dental floss is just a case to contain dental floss, and a user extracts dental floss contained in the case and cuts it with a cutter attached to the case, then use it. 
     When the user uses the dental floss cut from the case by winding the dental floss on fingers, it is available to adjust tension of the dental floss by utilizing feeling of hands. Accordingly, there is a merit of effectively caring teeth by adjusting a length of the dental floss in various angle positions. 
     However, when using the conventional case for dental floss, there is inconvenience that a user should extract and cut dental floss with a suitable length, and use the dental floss by winding it on both fingers every time, further, there is a drawback of inducing pain on fingers since tension is exerted to the dental floss winded on the fingers when cleaning teeth with tension being maintained after passing through the dental floss between teeth. 
     In addition, a user should cut dental floss longer than actual length required in order to fix it by winding on fingers, and so it causes a problem that dental floss is wasted more than needs. Further, in case that a user uses dental floss from loosening what is winded on fingers in order to adjust length of the dental floss, it also causes sanitary problems. 
     Moreover, there is a case that a user inserts fingers where the dental floss is winded to use the dental floss, which causes displeasure such as inducing vomiting as well as the sanitary problems. 
     As another conventional case of dental floss, a dental floss holder of ‘Y’ shape has been used. This works in a way that the dental floss is fixed on two pillars spaced apart at an upper part of main body in which the dental floss is contained. 
     However, this type of case has a problem that a user has to unwind dental floss and re-fix the dental floss since the dental floss fixed on two pillars tends to be loosen, as well as there is an inconvenience of fixing dental floss on two pillars every time. 
     In addition, there are inconveniences that it is not allowed to adjust a length of dental floss since the distance between two pillars is fixed, and the two pillars pierce inside of mouth when the dental floss holder is deeply inserted into mouth. 
     Accordingly, the present invention is to overcome the problems, and has an object to provide an interdental cleaning apparatus using both hands, which is sanitary since a user is able to use dental floss by holding a dental floss supplying stick and a dental floss collecting stick by both hands, enables the length and tension to be easily controlled, different from the conventional dental floss holder of ‘Y’ shape, and provides various flossing motions by utilizing feeling of the user&#39;s hand as it is. 
     In addition, an object of the present invention is to provide an interdental cleaning apparatus using both hands, which can solve the problem of inconvenience that a user should cut dental floss and use it by winding it on both fingers every time or a user should use dental floss by winding on a separate dental floss holder and discard it by cutting, since clean dental floss is continuously supplied from dental floss bundle contained in the dental floss supplying stick and used dental floss is stored in the dental floss collecting stick or discarded after being extracted outside, and which can minimize the waste of the dental floss 
     Furthermore, an object of the present invention is to provide an interdental cleaning apparatus using both hands where dental care products are equipped since separate storage space is provided in the dental floss supplying stick and/or the dental floss collecting stick, and interdental brushes, an oral refresher spray, a vibrator unit. etc. can be stored in the storage space. 
     The object of the present invention is not limited thereto, but the other objects not mentioned herein can be clearly understood from the description below for an ordinary stilled person in this an. 
     SUMMARY OF THE INVENTION 
     According to an embodiment of the present invention to attain the objects, an interdental cleaning apparatus using both hands is provided. The apparatus includes a dental floss supplying stick including a dental floss storing space where dental floss is stored, an open mg for extracting the dental floss stored in the dental floss strong space, and a dental floss fixing means that controls movement of the dental floss; and a dental floss collecting stick separately provided from the dental floss supplying stick and including a returnable dental floss fixing means, wherein the dental floss is respectively fixed at the dental floss fixing means of the dental floss supplying stick and the returnable dental floss fixing means of the dental floss collecting stick. 
     The embodiments of the present invention has an effect that is sanitary since a user is able to use dental floss by holding a dental floss supplying stick and a dental floss collecting stick by both hands, the length and tension is available to be easily controlled, different from the conventional dental floss holder of ‘Y’ shape, and various flossing motions are provided by utilizing feeling of the user&#39;s hand as it is. 
     In addition, the embodiments of the present invention has an effect that can solve the problem of inconvenience that a user should cut dental floss and use it by winding it on both fingers every time or a user should use dental floss by winding on a separate dental floss holder and discard it by cutting, since clean dental floss is continuously supplied from dental floss bundle contained in the dental floss supplying stick and used dental floss is stored in the dental floss collecting stick or discarded after being extracted outside. 
     Furthermore, the embodiments of the present invention has an effect of being stored and used together with dental care products since a separate storage space is provided in the dental floss supplying stick and/or the dental floss collecting stick, and interdental brushes, an oral refresher spray, a vibrator unit, etc. can be stored in the storage space. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of specifications of the present invention, illustrate embodiments of the present invention and together with the corresponding descriptions serve to explain the principles of the present invention. 
         FIG. 1  is a perspective view illustrating an interdental cleaning apparatus using both hands according to a first embodiment of the present invention. 
         FIG. 2  is an exploded perspective view illustrating a first embodiment of a dental floss supplying stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 . 
         FIG. 3  is a sectional view illustrating an engagement of the dental floss supplying stick shown in  FIG. 2 . 
         FIG. 4  is a drawing illustrating an operation process of the dental floss supplying stick shown in  FIG. 2 . 
         FIG. 5  is an exploded perspective view illustrating a second embodiment of a dental floss supplying stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 . 
         FIG. 6  is a drawing illustrating an operation process of according to a first modified embodiment of the dental floss supplying stick shown in  FIG. 2 . 
         FIG. 7  is a partial sectional view illustrating a second modified embodiment of the dental floss supplying stick shown in  FIG. 2 . 
         FIG. 8  is an exploded perspective view illustrating a first embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 . 
         FIG. 9  is a sectional view illustrating an engagement of the dental floss collecting stick shown in  FIG. 8 . 
         FIG. 10  is an exploded perspective view illustrating a second embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 . 
         FIG. 11  is a perspective view illustrating an interdental cleaning apparatus using both hands according to a second embodiment of the present invention. 
         FIG. 12  is an exploded perspective view illustrating a first embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 11 . 
         FIG. 13  is a sectional view illustrating an engagement of a part of the dental floss collecting stick shown in  FIG. 12 . 
         FIG. 14  is an exploded perspective view illustrating a second embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 11 . 
         FIG. 15  is a perspective view illustrating an example of use of a vibration unit shown in  FIG. 14 . 
         FIG. 16  is an exploded perspective view illustrating a third embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 11 . 
         FIG. 17  is a perspective view illustrating an interdental cleaning apparatus using both hands according to the third embodiment of the present invention. 
         FIG. 18  is an exploded perspective view illustrating a first embodiment of a dental floss supplying stick that is applicable to the interdental cleaning apparatus shown in  FIG. 17 . 
         FIG. 19  is an exploded perspective view illustrating a first embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 17 . 
         FIG. 20  is a drawing illustrating an operation process of the dental floss collecting stick shown in  FIG. 19 . 
         FIG. 21  is an exploded perspective view illustrating a second embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 17 . 
         FIG. 22  is a drawing illustrating an operation process of the dental floss collecting stick shown in  FIG. 21 . 
         FIG. 23  is an exploded perspective view illustrating an interdental cleaning apparatus using both hands and a storage case according to the embodiments of the present invention. 
         FIG. 24  is a partially exploded perspective view illustrating an interdental cleaning apparatus using both hands according to the fourth embodiment of the present invention. 
         FIG. 25  is a drawing illustrating an operation process of the dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 24 . 
         FIG. 26  is a perspective view illustrating a stored state of the interdental cleaning apparatus shown in  FIG. 25 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that in the drawings, when adding reference numerals to elements in each drawing, the same elements are denoted by the same reference numerals although the elements are shown in different drawing if it is possible. 
     In addition, in describing the present invention, if it is determined that detailed description for related known elements or functions makes the purport of the present invention obscure, the detailed description will be omitted. 
     Further, terms such as “a first”, “a second”, “A”, “B”, “(a)”, “(b)”, etc. may be used for describing elements of the present invention. Such terms are only designated to distinguish an element from another element, but the nature or order of the corresponding terms is not limited to the terms. 
     When it is described that an element is “connected” or “coupled” to another element, it should be understood that the element may be directly connected or coupled, but the other element may be “connected” or “coupled” between each of the elements. 
     Hereinafter, by reference to  FIG. 1  to  FIG. 10 , an interdental cleaning apparatus using both hands according to a first embodiment of the present invention will be described. 
       FIG. 1  is a perspective view illustrating an interdental cleaning apparatus using both hands according to the first embodiment of the present invention.  FIG. 2  is an exploded perspective view illustrating a first embodiment of a dental floss supplying stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 .  FIG. 3  is a sectional view illustrating an engagement of the dental floss supplying stick shown in  FIG. 2 . 
       FIG. 4  is a drawing illustrating an operation process of the dental floss supplying stick shown in  FIG. 2 .  FIG. 5  is an exploded perspective view illustrating a second embodiment of a dental floss supplying stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 .  FIG. 6  is a drawing illustrating an operation process of according to a first modified embodiment of the dental floss supplying stick shown in  FIG. 2 . 
       FIG. 7  is a partial sectional view illustrating a second modified embodiment of the dental floss supplying stick shown in  FIG. 2 .  FIG. 8  is an exploded perspective view illustrating a first embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 .  FIG. 9  is a sectional view illustrating an engagement of the dental floss collecting stick shown in  FIG. 8 .  FIG. 10  is an exploded perspective view illustrating a second embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 1 . 
     As shown in the drawings above, an interdental cleaning apparatus  100  using both hands according to a first embodiment of the present invention includes a dental floss supplying stick  105  including an opening  101  for extracting dental floss, a dental floss storing space  301  where dental floss  103  is stored and a dental floss fixing means  303  that controls movement of the dental floss  103 ; and a dental floss collecting stick  109 , which is physically separately provided from the dental floss supplying stick (preferably, perfectly physically separately provided), and including an opening  107  for inserting returnable dental floss and a returnable dental floss fixing means  903  for controlling movement of the dental floss  103  therein, wherein the dental floss  103  stored in the dental floss storing space is respectively fixed at the dental floss fixing means of the dental floss supplying stick and the returnable dental floss fixing means of the dental floss collecting stick, and used dental floss is stored in the dental floss collecting stick  109  via the opening  107  for inserting returnable dental floss. 
     Hereinafter, the dental floss supplying stick  105  and the dental floss collecting stick  109  will be described sequentially. 
     The dental floss supplying stick  105  performs a function of supplying the dental floss  103 . At an upper part of the dental floss supplying stick  105 , the opening  101  for extracting dental floss is formed to extract the dental floss  103 , and inside of the dental floss supplying stick  105 , the dental floss storing space  301  where the dental floss (dental floss bundle)  103  is stored is provided. 
     In addition, the dental floss fixing means  303  for controlling movement of the dental floss  103  is provided inside of the dental floss supplying stick  105 . 
     Such a dental floss supplying stick  105  may be provided in a long rod shape so as to be held by one hand. 
     Meanwhile, in describing an example of a structure of the dental floss supplying stick  105  in more detail, the dental floss supplying stick  105  may include a dental floss supply-side upper case  111  and a dental floss supply-side lower case  113 , which are engaged with or released from each other. 
     Here, the dental floss supply-side upper case  111  and the dental floss supply-side lower case  113  may be engaged with or released from each other with a engaging means such as a screw thread engaging means, a tight fit engaging means, etc., and beside, may be engaged with or released from each other with various engaging means. 
     Of course, different from this, the dental floss supplying stick  105  may form a stick shape in which a plurality of covers is integrally coupled in upper and lower direction or left and right direction. 
     At an upper part of the dental floss supply-side upper case  111 , the opening  101  for extracting dental floss is formed, and a lower part of the dental floss supply-side upper case  111  is formed with an opening shape. 
     Accordingly, when the dental floss supply-side upper case  111  is engaged with the dental floss supply-side lower case  113 , the dental floss storing space  301  where the dental floss (dental floss bundle)  103  is stored is formed, and a dental floss movement route where the dental floss  103  supply moves is formed. 
     Here, the dental floss movement route signifies a passage through which the dental floss  103  moves toward the opening  101  for extracting dental floss, and a passage where the dental floss  103  supply (i.e., unused dental floss) is not exposed to outside. 
     The dental floss supply-side lower case  113  is engaged with or released from the dental floss supply-side upper case  111 , and a dental floss supply-side inner pillar  201 , which is inserted into the dental floss supply-side upper case  111  and guides movement of the dental floss  103  stored in the dental floss storing space  301 , is provided in the dental floss supply-side lower case  113 . 
     At the moment, the dental floss supply-side inner pillar  201  may be provided in a shape of being extended from the dental floss supply-side lower case  113  to the upper part, as shown in  FIG. 3 , or extended with being protruded from the center to the upper part after being engaged at an upper end of the dental floss supply-side lower case  113  with a cap shape, as shown in  FIG. 5 . 
     Of course, in case of the dental floss supply-side inner pillar  201  shown in  FIG. 5 , a dental floss passing groove  503  of a grooved shape may be formed on a body part  501  which is supported at the upper end of the dental floss supply-side lower case  113 . 
     Meanwhile, as an example, the dental floss fixing means  303  that controls movement of the dental floss  103  may include a first upper case dental floss fixing part  305  formed at an inner circumference of the dental floss supply-side upper case  111  and a first inner pillar dental floss fixing part  203  which is engaged with or released from the first upper case dental floss fixing part  305  and formed at an outer circumference surface of the dental floss supply-side inner pillar  201 . 
     Here, the first upper case dental floss fixing part  305  and the first inner pillar dental floss fixing part  203  may be formed in an uneven structure that is engaged with each other, and owing to the uneven structure, the first upper case dental floss fixing part  305  and the first inner pillar dental floss fixing part  203  may be firmly and tightly coupled with each other, and accordingly, available to fix the dental floss  103 . 
     In addition, when the first upper case dental floss fixing part  305  and the first inner pillar dental floss fixing part  203  are coupled, an upper end of the first inner pillar dental floss fixing part  203  (i.e., an upper end of the dental floss supply-side inner pillar  201 ) is inserted into and seals the opening  101  for extracting dental floss, which prevents foreign substances from penetrating into the dental floss supplying stick  105 . 
     And the upper end of the first inner pillar dental floss fixing part  203  (i.e., an upper end of the dental floss supply-side inner pillar  201 ) may be protruded outside of the dental floss supply-side upper case  111  when the first upper case dental floss fixing part  305  and the first inner pillar dental floss fixing part  203  are coupled. A groove  603 , which is laterally inserted as shown in  FIG. 6 , is formed at an outer circumference of the protruded part  601 , and accordingly, when a user uses it, the dental floss  103  which is extracted from the dental floss supplying stick  105  is winded in the groove  603 , and then, a length of it may be adjusted. 
     Of course, a protrusion may be formed at an outer circumference of the opening  101  for extracting dental floss, instead of the groove  603 , and the dental floss  103  placed between the dental floss supplying stick  105  and the dental floss collecting stick.  109  is winded, and then, a length of it may be adjusted. 
     In addition, the dental floss fixing means  303  described above may replace or assist the function of a engaging means (a screw thread engaging means or a tight fit engaging means) that the dental floss supply-side upper case  111  and the dental floss supply-side lower case  113  may be engaged with or released from. 
     That is, when either one of the engaging means or the dental floss fixing means  303  that engages or releases the dental floss supply-side upper case  111  and the dental floss supply-side lower case  113  is strongly engaged or loosely engaged, or release the engagement, the rest of them is also strongly engaged or loosely engaged, or release the engagement, which is interconnected thereto. 
     Also, even if the dental floss fixing means  303  is released, the dental floss supply-side upper case  111  and the dental floss supply-side lower case  113  are prevented from being completely separated by maintaining loose engagement. 
     In other words, the engaging means and the dental floss fixing means  303  that engages or releases the dental floss supply-side upper case  111  and the dental floss supply-side lower case  113  engage or release with a screw thread engaging way or a tight fit engaging way, respectively, as shown in  FIG. 7 . By interconnecting the operation, when the engaging means is released or switched from a strong engagement to a loosen engagement, then the coupling force of the dental floss fixing means  303  may be released or switched to a loose engagement. 
     Accordingly, the dental floss  103  provided in the dental floss storing space  301  may be extracted outside through the opening  101  for extracting dental floss since the movement of the dental floss  103  is free. And when the engaging means is strongly engaged again, the dental floss fixing means  303  is also strongly engaged, then, the dental floss  103  is firmly fixed to the dental floss supplying stick  105 . 
     Or, in case that the dental floss fixing means  303  is a screw thread engaging type, since the dental floss  103  is fixed by the dental floss fixing means  303  and simultaneously, the dental floss supply-side upper case  111  and the dental floss supply-side lower case  113  are also coupled, separate engaging means may not required. 
     Meanwhile,  FIG. 7 ( a )  illustrates an example that the engaging means and the floss supply fixing means  303  are a screw thread engaging type.  FIG. 7 ( b )  illustrates an example that the engaging means is a tight fit engaging type and the floss supply fixing means  303  is a screw thread engaging type, and  FIG. 7( c )  illustrates an example that the engaging means is a tight fit engaging type and the floss supply fixing means  303  is also a tight fit engaging type. 
     Further, a storage space  307  may be provided at a lower part of the dental floss supplying stick  105 . In the storage space  307 , an interdental brush  205  may be stored in order to increase user&#39;s convenience. 
     The dental floss collecting stick  109  performs the role of collecting the dental floss  103 . The opening  107  for inserting returnable dental floss is formed at the upper part of the dental floss collecting stick  109  so as to insert the dental floss  103 , and a returnable dental floss storing space  901  where a returnable dental floss (dental floss bundle)  103  for collecting the dental floss  103  may be provided inside of the dental floss collecting stick  109 . 
     In addition, the returnable dental floss fixing means  903  that controls movement of the dental floss  103  is provided inside of the dental floss collecting stick  109 . 
     Such a dental floss collecting stick  109  may be provided in a long rod shape such that a user easily holds it with one hand. 
     Meanwhile, when describing an example of a structure of the dental floss collecting stick  109  in more detail, the dental floss collecting stick  109  may include a dental floss collecting-side upper case  115  and a dental floss collecting-side lower case  117  which are engaged with or released from each other. 
     Here, the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  may be engaged with or released from each other with a engaging means such as a screw thread engaging means, a tight fit engaging means, etc., and beside, may be engaged with or released from each other with various engaging means. 
     Of course, different from this, the dental floss collecting stick  109  may form a stick shape in which a plurality of covers is integrally coupled in upper and lower direction or left and right direction. 
     The opening  107  for inserting returnable dental floss is formed at an upper part of the dental floss collecting-side upper case  115 , and a lower part of the dental floss collecting-side upper case  115  is formed with an opening shape. 
     Accordingly, when the dental floss collecting-side upper case  115  is engaged with the dental floss collecting-side lower case  117 , the returnable dental floss storing space  901  where the dental floss (dental floss bundle)  103  is stored may be formed, and a dental floss movement route where the returnable dental floss  103  moves is formed. 
     Here, the dental floss movement route where the returnable dental floss  103  moves signifies a passage through which the dental floss  103  inserted through opening  107  for inserting returnable dental floss moves, and a passage where the returnable dental floss  103  (i.e., used dental floss) is not exposed to outside. 
     The dental floss collecting-side lower case  117  is engaged with or released from the dental floss collecting-side upper case  115 , and a dental floss collecting-side inner pillar  801 , which is inserted into the dental floss collecting-side upper case  115  and guides movement of the dental floss  103  inserted through opening  107  for inserting returnable dental floss, is provided in the dental floss collecting-side lower case  117 . 
     At the moment, the dental floss collecting-side inner pillar  801  may be provided with a structure that a lower end that passes through a lower surface of the dental floss collecting-side lower case  117  is coupled to a peg knob  803 , as shown in  FIG. 9 , or may be provided with a structure that a lower end of the dental floss collecting-side inner pillar  801  is coupled to the lower surface of the dental floss collecting-side lower case  117 , as shown in  FIG. 10 . 
     Here, in case that the lower end of the dental floss collecting-side inner pillar  801  is coupled to the peg knob  803  through the lower surface of the dental floss collecting-side lower case  117 , when the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  engage in order to fix the dental floss  103  after the dental floss is collected with being winded on the dental floss collecting-side inner pillar  801 , the problem that is hard to adjust a length of the dental floss  103  since the dental floss collecting-side lower case  117  excessively rotates can be solved. 
     And a dental floss inducing groove  807  for inducing the collected dental floss  103  to the dental floss collecting-side inner pillar  801  may be formed on any one side or both sides that the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  face each other. In the drawings, an example is shown that the dental floss inducing groove  807  is formed on the dental floss collecting-side upper case  115 , particularly. 
     As such, since the dental floss inducing groove  807  is formed, the collecting dental floss  103  is not influenced by the rotation of the dental floss collecting-side lower case  117  or the peg knob  803 , and can be winded on the dental floss collecting-side inner pillar  801  without being entangled. 
     Meanwhile, the returnable dental floss fixing means  903  that controls movement of the dental floss  103  may include, for example, a second upper case dental floss fixing part  905  formed on an inner circumference of the dental floss collecting-side upper case  115 , and a second inner pillar dental floss fixing part  805  formed on an outer circumference of the dental floss collecting-side inner pillar  801  engaged with or released from the second upper case dental floss fixing part  905 . 
     Here, the second upper case dental floss fixing part  905  and the second inner pillar dental floss fixing part  805  may be formed in an uneven structure that is engaged with each other, and owing to the uneven structure, the first upper case dental floss fixing part  305  and the second inner pillar dental floss fixing part  805  may be firmly and tightly coupled with each other, and accordingly, available to fix the dental floss  103 . 
     In addition, when the second upper case dental floss fixing part  905  and the second inner pillar dental floss fixing part  805  are coupled, an upper end of the second inner pillar dental floss fixing part  805  (i.e., an upper end of the dental floss collecting-side inner pillar  801 ) is inserted into and seals the opening  107  for inserting returnable dental floss, which prevents foreign substances from penetrating into the dental floss collecting stick  109 . 
     And, although it is not depicted in the drawings, similar to the structure shown in  FIG. 6 , the upper end of the second inner pillar dental floss fixing part  805  (i.e., an upper end of the dental floss collecting-side inner pillar  801 ) may be protruded outside of the dental floss collecting-side upper case  115  when the second upper case dental floss fixing part  905  and the second inner pillar dental floss fixing part  805  are coupled. A groove which is laterally inserted is formed at an outer circumference of the protruded part, and accordingly, when a user uses it, the dental floss  103  which is inserted into the dental floss collecting stick  109  is winded in the groove, and then, a length of it may be adjusted. 
     Of course, a protrusion may be formed at an outer circumference of the opening  107  for inserting returnable dental floss, instead of the groove, and the dental floss  103  placed between the dental floss collecting stick  109  and the dental floss supplying stick  105  is winded, and then, a length of it may be adjusted. 
     In addition, the returnable dental floss fixing means  903  described above may replace or assist the function of a engaging means (a screw thread engaging means or a tight fit engaging means) that the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  may be engaged with or released from. 
     That is, when either one of the engaging means or the returnable dental floss fixing means  903  that engages or releases the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  is strongly engaged or loosely engaged, or release the engagement, the rest of them is also strongly engaged or loosely engaged, or release the engagement, which is interconnected thereto. 
     Also, even if the returnable dental floss fixing means  903  is released, the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  are prevented from being completely separated by maintaining loose engagement. 
     In other words, the engaging means and the returnable dental floss fixing means  903  that engages or releases the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  engage or release with a screw thread engaging way or a tight fit engaging way, respectively. By interconnecting the operation, when the engaging means is released or switched from a strong engagement to a loosen engagement, then the coupling force of the returnable dental floss fixing means  903  may be released or switched to a loose engagement. Accordingly, movement of the dental floss  103  is free, and the dental floss  103  may be inserted into the returnable dental floss storing space  901  through the opening  107  for inserting returnable dental floss. 
     And when the engaging means is strongly engaged, the returnable dental floss fixing means  903  is also strongly engaged, then, the dental floss  103  is firmly fixed to the dental floss collecting stick  109 . 
     Or, in case that the returnable dental floss fixing means  903  is a screw thread engaging type, since the dental floss  103  is fixed by the returnable dental floss fixing means  903  and simultaneously, the dental floss collecting-side upper case  115  and the dental floss collecting-side lower case  117  are also coupled, separate engaging means may not required. 
     Hereinafter, by reference to  FIG. 11  to  FIG. 16 , an interdental cleaning apparatus using both hands according to a second embodiment of the present invention will be described. 
       FIG. 11  is a perspective view illustrating an interdental cleaning apparatus using both hands according to the second embodiment of the present invention.  FIG. 12  is an exploded perspective view illustrating a first embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 11 .  FIG. 13  is a sectional view illustrating an engagement of a part of the dental floss collecting stick shown in  FIG. 12 . 
       FIG. 14  is an exploded perspective view illustrating a second embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 11 .  FIG. 15  is a perspective view illustrating an example of use of a vibration unit shown in  FIG. 14 .  FIG. 16  is an exploded perspective view illustrating a third embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 11 . 
     While the interdental cleaning apparatus according to the first embodiment described above shown in  FIG. 1  to  FIG. 10  has the structure that the returnable dental floss  103  (i.e. used dental floss) is stored in the returnable dental floss storing space provided inside of the dental floss collecting stick, the interdental cleaning apparatus according to the second embodiment has a structure that the returnable dental floss is not stored in the dental floss collecting stick, but is removed. 
     As shown in  FIG. 11  to  FIG. 16 , an interdental cleaning apparatus  100  using both hands according to a second embodiment of the present invention includes a dental floss supplying stick  105  which is applied to the first embodiment described above; and a dental floss collecting stick  109  including an opening  107  for inserting returnable dental floss and a returnable dental floss fixing means  903  for controlling movement of the dental floss  103  therein. 
     As mentioned above, since the dental floss supplying stick  105  is identical to the dental floss supplying stick according to the first embodiment described above, only the dental floss collecting stick  109  will be described below. 
     A denial floss collecting-side inner pillar  1201  is provided with a structure that an upper portion is extended with being protruded from an upper surface of the dental floss collecting-side lower case  117  to an upper part, and a cutting part  1101  that cut the returnable dental floss  103  (i.e., used dental floss) is provided on an outer surface of the dental floss collecting stick  109 , for example, an outer surface of the dental floss collecting-side lower case  117 . 
     And, in the dental floss collecting-side lower case  117 , an incision part is formed to extract the dental floss inserted into the dental floss collecting-side upper case  115  toward outside of the dental floss collecting stick  109 . 
     Accordingly, the returnable dental floss  103  (i.e., used dental floss) may be simply cut by using the cutting part  1101  in a state of being extracted outside of the dental floss collecting stick through the incision art which is formed in the dental floss collecting-side lower case  117 . 
     In addition, a storage space  1301  may be provided at a lower part of the dental floss collecting stick  109 , and the interdental brush  205  may be stored in the storage space  1301 . On the other hand, an oral refresher spray  1701  or a vibrator unit  1501 , etc. may be connected or stored in the dental floss collecting-side lower case  117 , and a groove  1503  that may mount the interdental brush  1601  may be formed in the vibrator unit  1501 . 
     Hereinafter, by reference to  FIG. 17  to  FIG. 22 , an interdental cleaning apparatus using both hands according to a third embodiment of the present invention will be described. 
       FIG. 17  is a perspective view illustrating an interdental cleaning apparatus using both hands according to the third embodiment of the present invention.  FIG. 18  is an exploded perspective view illustrating a first embodiment of a dental floss supplying stick that is applicable to the interdental cleaning apparatus shown in  FIG. 17 .  FIG. 19  is art exploded perspective view illustrating a first embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 17 . 
       FIG. 20  is a drawing illustrating an operation process of the dental floss collecting stick shown in  FIG. 19 .  FIG. 21  is an exploded perspective view illustrating a second embodiment of a dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 17 .  FIG. 22  is a drawing illustrating an operation process of the dental floss collecting stick shown in  FIG. 21 . 
     The interdental cleaning apparatus shown in  FIG. 17  to  FIG. 22  is constructed such that the returnable dental floss (i.e., used dental floss) is not collected or stored in an inner space of the dental floss collecting stick, but is removed, similar to the second embodiment described above. 
     First, referring to  FIG. 17  to  FIG. 20 , an interdental cleaning apparatus using both hands according to a third embodiment of the present invention includes a dental floss supplying stick  2105  and a dental floss collecting stick  2109 . 
     The dental floss supplying stick  2105  is provided with a dental floss supply-side upper case  2111  and a dental floss supply-side lower case  2113  that may be engaged with or released from each other with various engaging means such as a screw thread engaging means, a tight fit engaging means, etc. 
     An opening  2101  for extracting dental floss is formed at an upper part of the dental floss supply-side upper case  2111 , and a dental floss storing space  2301  where the dental floss (dental floss bundle)  2103  is stored is provided in the dental floss collecting-side lower case  2113 . 
     And an incision part  2119  is provided in the dental floss collecting-side lower case  2113  so as to extract the dental floss  103  through the opening  2101  for extracting dental floss as well as store the dental floss  103  supply in the dental floss storing space  2301 . Adjacent to incision part  2119 , a dental floss supply-side inner pillar  2201  that includes a first inner pillar dental floss fixing part  2203  that controls movement of the dental floss  2103  is provided. 
     Accordingly, when the dental floss collecting-side upper case  2111  is coupled with the dental floss collecting-side lower case  2113 , the inner pillar  2201  is located inside of the dental floss supply-side upper case  2111 . 
     Meanwhile, although it is not shown, on an inner circumference of the dental floss supply-side upper case  2111 , a first upper case dental floss fixing part (refer to reference numeral  303  in  FIG. 3 ) that is engaged with or released from a first inner pillar dental floss fixing part  2203  formed on the dental floss supply-side inner pillar  2201  may be further formed. 
     Since the operation of fixing and releasing dental floss by the first inner pillar dental floss fixing part  2203  and the first upper case dental floss fixing part is the same or similar to the first embodiment described above, detailed description will be omitted. 
     The dental floss collecting stick  2109  includes a dental floss collecting-side upper case  2115  and a dental floss collecting-side lower case  2117  that may be engaged with or released from each other with various engaging means such as a screw thread engaging means, a tight fit engaging means, etc. 
     Since an opening  2107  is formed at an upper part of the dental floss collecting-side upper case  2115  and a lower part of the dental floss collecting-side upper case  2115  is formed with an open shape, when the dental floss collecting-side upper case  2115  is coupled to the dental floss collecting-side lower case  2117 , a dental floss collecting-side inner pillar  2801  is located therein. 
     The dental floss collecting-side inner pillar  2801  is coupled to the dental floss collecting-side lower case  2117 . In order to properly maintain the coupling state of the dental floss collecting-side inner pillar  2801  and the dental floss collecting-side lower case  2117 , a groove  2118  where a lower end of the dental floss collecting-side inner pillar  2801  is coupled is formed in a polygon shape, for example, a quadrangle. 
     Meanwhile, the returnable dental floss fixing means that controls movement of the dental floss  103  may include, for example, a second upper case dental floss fixing part  2905  formed on an outer circumference of the dental floss collecting-side upper case  2115 , and a second inner pillar dental floss fixing part  2805  which is engaged with or released from the second upper case dental floss fixing part  2905  and formed on the dental floss collecting-side inner pillar  2801 . 
     And a dental floss hole  2806  is formed on the second inner pillar dental floss fixing part  2805 , and a cutting part  1101  that cut the returnable dental floss (i.e., used dental floss) is provided on an outer surface of the dental floss collecting stick  2109 , for example, an outer surface of the dental floss collecting-side lower case  2117 . 
     Accordingly, the returnable dental floss (i.e., used dental floss) may be easily cut by using the cutting part  1101 . 
     Hereinafter, by reference to  FIG. 21  and  FIG. 22 , a dental floss collecting stick according to a second embodiment that is applicable to the interdental cleaning apparatus shown in  FIG. 17  will be described. 
     The dental floss collecting stick  3109  according to the embodiment includes a dental floss collecting-side upper case  3115  and a dental floss collecting-side lower case  3117  that may be engaged with or released from each other with various engaging means such as a screw thread engaging means, a tight fit engaging means, etc. 
     Since a longitudinal opening  3107  and a lateral opening  3108  are formed at an upper part of the dental floss collecting-side upper case  3115  and a lower part of the dental floss collecting-side upper case  3115  is formed with an open shape, when the denial floss collecting-side upper case  3115  is coupled to the dental floss collecting-side lower case  3117 , a dental floss collecting-side inner pillar  3801  is located therein. 
     The dental floss collecting-side inner pillar  3801  is integrally formed with the dental floss collecting-side lower case  3117 . 
     Meanwhile, the returnable dental floss fixing means that controls movement of the dental floss  103  may include, for example, a second upper case dental floss fixing part  3905  formed on the dental floss collecting-side upper case  3115 , and a second inner pillar dental floss fixing part  3805  which is engaged with or released from the second upper case dental floss fixing part  3905  and formed on the dental floss collecting-side inner pillar  3801 . 
     And a cutting part  1101  that cut the returnable dental floss (i.e., used dental floss) is provided on an outer surface of the dental floss collecting stick  3109 , for example, an outer surface of the dental floss collecting-side lower case  3117 . 
     Accordingly, the returnable dental floss (i.e., used dental floss) may be easily cut by using the cutting part  1101 . 
     The dental floss supplying stick that is applicable to the interdental cleaning apparatus according to the third embodiment may be applied instead of the dental floss supplying stick of the interdental cleaning apparatus according to the first embodiment and the second embodiment described above, and the dental floss collecting stick that is applicable to the interdental cleaning apparatus according to the third embodiment may be applied instead of the dental floss collecting stick of the interdental cleaning apparatus according to the first embodiment and the second embodiment described above. 
     Meanwhile, as shown in  FIG. 23 , the dental floss supplying stick  105  and  2105  and the dental floss collecting stick  109 ,  2109  and  3109  may be stored by being received in a storage case  1401 , and the storage case  1401  may include a body part  1403  where the dental floss supplying stick  105  and  2105  and the dental floss collecting stick  109 ,  2109  and  3109  are engaged with tight fit; and a handle part  1407  extendedly formed from the body part  1403 , and a tongue cleaner  1405  is formed at an end part. 
     Here, the tongue cleaner  1405  may be formed in ‘T’ shape or ‘O’ shape, and a scraping part which is protruded in a lateral direction with a predetermined height may be formed. 
     Such a storage case  1401  enables to use the tongue cleaner  1405  independently as well as to store the dental floss supplying stick  105  and  2105 , the dental floss collecting stick  109 ,  2109  and  3109  and the exposed dental floss  103  simultaneously and hygienically, and accordingly, more efficient dental care becomes available. 
     Hereinafter, by reference to  FIG. 24  to  FIG. 26 , an interdental cleaning apparatus using both hands according to a fourth embodiment of the present invention will be described. 
       FIG. 24  is a partially exploded perspective view illustrating an interdental cleaning apparatus using both hands according to the fourth embodiment of the present invention  FIG. 25  is a drawing illustrating an operation process of the dental floss collecting stick that is applicable to the interdental cleaning apparatus shown in  FIG. 24 .  FIG. 26  is a perspective view illustrating a stored state of the interdental cleaning apparatus shown in  FIG. 25 . 
     The interdental cleaning apparatus according to the embodiment has a structure that the returnable dental floss (i.e., used dental floss) is not stored in an inner space of the dental floss collecting stick, but is removed, similar to the interdental cleaning apparatus according to the second embodiment described above. 
     The interdental cleaning apparatus according to the third embodiment includes a dental floss supplying stick  105  which is applied to the interdental cleaning apparatus according to the first embodiment or a dental floss supplying stick  2105  which is applied to the interdental cleaning apparatus according to the second embodiment, and a dental floss collecting stick  4109  of a new structure. 
     The dental floss collecting stick  4109  includes a dental floss collecting-side upper case  4115  and a dental floss collecting-side lower case  4117  that may be engaged with or released from each other with a tight fit engaging means. 
     Since a lower part of the dental floss collecting-side upper case  4115  is formed with an open shape, when the dental floss collecting-side upper case  4115  is coupled to the dental floss collecting-side lower case  4117 , a part of the dental floss collecting-side lower case  4117  is located therein. 
     The returnable dental floss fixing means that controls movement of the dental floss  4103  may include, for example, a second upper case dental floss fixing part  4905  and an incision part  4119  respectively formed on the dental floss collecting-side upper case  4115 . 
     Accordingly, when the dental floss collecting-side lower case  4117  is engaged with the dental floss collecting-side upper case  4115  in a state that a part of the dental floss is located at the incision part  4119  after the dental floss is winded on the second upper case dental floss fixing part  4905  once or twice, the dental floss  4103  is fixed. 
     When the interdental cleaning apparatus having such a construction is not used, the apparatus may be stored by assembling the dental floss collecting-side upper case  4115  to the dental floss supplying stick  105  or  2105  and assembling the dental floss collecting-side lower case  4117  to the dental floss collecting-side upper case  4115 . 
     And a cutting part  1101  that cut the returnable dental floss (i.e., used dental floss) may be provided on an outer surface of the dental floss supplying stick  105  or  2105 . 
     The embodiments of the present invention having such structures and shapes has an effect that is sanitary since a user is able to use dental floss by holding a dental floss supplying stick and a dental floss collecting stick by both hands, the length and tension is available to be easily controlled, different from the conventional dental floss holder of ‘Y’ shape, and various flossing motions are provided by utilizing feeling of the user&#39;s hand as it is. 
     In addition, the embodiments of the present invention has an effect that can solve the problem of inconvenience that a user should cut dental floss and use it by winding it on both fingers every time or a user should use dental floss by winding on a separate dental floss holder and discard it by cutting, since clean dental floss is continuously supplied from dental floss bundle contained in the dental floss supplying stick and used dental floss is stored in the dental floss collecting stick or discarded after being extracted outside. 
     Furthermore the embodiments of the present invention has an effect of being stored and used together with dental care products since a separate storage space is provided in the dental floss supplying stick and/or the dental floss collecting stick, and interdental brushes, an oral refresher spray, a vibrator unit, etc. can be stored in the storage space. 
     So far, the description that all elements that construct the embodiments of the present invention are combined into one or operated by being combined into one does not signify that the present invention is limited to the embodiments. 
     That is, within the object of the present invention, all of the elements may be operated by being selectively combined into one or more constructions. 
     In addition, the term, “include”, “construct”, “have”, etc. described so far signifies that the corresponding element may be included, unless otherwise described. Accordingly, the term should be interpreted inclusively, not exclusively. 
     Generally used terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. 
     It will be further understood that the terms such as those defined in commonly used dictionary should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     So far, the description of the present invention has been exemplary presented, many modifications and variations may be made by those of ordinary skill in the art without departing from the spirit and scope of the present invention. 
     Accordingly, the embodiments disclosed in the present invention are not intended to limit the inventive concept of the present invention, but rather to describe the invention, and the inventive concept is not limited by the embodiments. 
     The scope of the present invention should be interpreted by the claims below, and it should be interpreted that all inventive concepts which are equivalent to it falls into the scope of the present invention.