Patent Abstract:
The present invention relates to a syringe, and more particularly, to a syringe, in which, when liquid medicine for treatment such as an analgesic is suctioned into a syringe by using a syringe needle and injected into a human body through the syringe needle, foreign substances generated in an ampule and the like are filtered in the syringe when the liquid medicine is injected into the human body when the foreign substances are suctioned into the syringe through the syringe needle. In addition, the filter for the filtering has a simple structure so that the filter can be simply installed into the syringe.

Full Description:
CROSS-REFERENCE TO RELATED APPLICATION(S)  
       [0001]    This application is a continuation application, claiming the benefit under §365(c), of an international application serial number PCT/KR2013/010669, filed on Nov. 22, 2013, which claimed the benefit of a Korean patent application filed on Dec. 3, 2012 in the Korean Intellectual Property Office and assigned Serial number 10-2012-0139188 and of a Korean patent application filed on May 24, 2013 in the Korean Intellectual Property Office and assigned Serial number 10-2013-0058698, the entire disclosure of each of which is hereby incorporated by reference. 
     
    
     TECHNICAL FIELD  
       [0002]    The present invention relates to a syringe, and more particularly, to a syringe, in which, when liquid medicine for treatment such as an analgesic is suctioned into a syringe by using a syringe needle and injected into a human body through the syringe needle, foreign substances generated in an ampule and the like are filtered in the syringe when the liquid medicine is injected into the human body when the foreign substances are suctioned into the syringe through the syringe needle. 
         [0003]    In addition, a filter for the filtering is installed in the syringe such that the syringe can be used for injecting medicine into a human body as well as a catheter, and the filter is prevented from being detached from the syringe during suctioning and injecting through a simple insertion of the filter. 
       BACKGROUND  
       [0004]    In general, a syringe includes a syringe body and a syringe needle, and is used in a hygienically packaged or stored state after coupling the syringe needle to the syringe or in a state that the syringe needle is assembled with the syringe when directly injecting the liquid medicine into a body of an infected patient to usually resolve concerns of secondary infections during the injection. 
         [0005]    However, an injection liquid to be injected to the infected patient is usually processed and stored as a powder for ease storage, and the powder is mixed with a liquid in use. In this case, a sealed ampule, in which the powder or the liquid is stored, is opened for use, and when the ampule is opened, since the ampule is made of glass or plastic, fine particles of glass powders or plastic powders are generated and contained in the ampule, and the particles are suctioned into the syringe when the liquid medicine is mixed or suctioned. As a result, the particles are injected into the body. 
         [0006]    Therefore, recently, as shown in  FIG. 7  and  FIG. 8 , there has been proposed a syringe, in which a filter is installed in a syringe needle fixing member, which is equipped with a syringe needle and detachably provided at a front end of the syringe, to filter foreign substances such as glass powders and the like when a mixed or a liquefied liquid medicine is suctioned into a cylinder of a syringe body by using a piston. However, the syringe needle used in this case is required to be exchanged before the liquid medicine is injected into the body, so the foreign substance attached to the filter may be injected again to a patient when the syringe needle is not exchanged due to carelessness or a mistake. 
         [0007]    In addition, when only the syringe needle is exchanged, the syringe may be contaminated by surrounding viruses, the series of work is very cumbersome, and emergency patients may not be quickly treated. In addition, many disposable syringes are used every day, and since a plurality of syringe needles are used for each syringe, medical wastes are exponentially increased thereby causing an adverse effect on the environment. 
         [0008]    Specifically, the medical wastes are separately classified and processed from normal wastes, thereby increasing the processing costs. 
         [0009]    In addition, when installing the filter, which is installed in the syringe needle, because an inner area of the fixing member to which the syringe needle is installed is too narrow, if the filter is installed, the pressure in the syringe needle becomes high when injecting the liquid medicine due to a bottleneck. Therefore, a large amount of strength is required to press the piston to inject the liquid medicine into the patient thereby bringing about discomfort to doctors, and, specifically, according to the amount of the liquid medicine to be injected into the infected patient, a lack of proper treatment and side effects to the infected patients may occur, thereby increasing the risk of safety accidents. 
         [0010]    Therefore, to solve these problems, the applicant of the present invention has proposed a bi-directional filter needle installed at a fixing member of the syringe needle, however, the filter needle cannot be used when a different liquid medicine is to be injected to a patient, who uses a catheter, during injection, and since the filter needle is installed to the syringe needle, alleviating the pressure is problematic due to the size limit. 
       SUMMARY  
       [0011]    Therefore, according to the present invention, a filter part for filtering foreign substances and the like is installed at a front end of a cylinder of a syringe body such that the filter part can be used for multipurpose and the filter part can filter only when the liquid medicine is injected into the body without filtering when the liquid medicine is suctioned. 
         [0012]    In addition, the filter part is subject to least pressure when the liquid medicine is injected into the body and the liquid medicine is suctioned without resistance so that convenience of usage is provided to the user. 
         [0013]    In addition, when assembling the filter part, the filter can be installed by only inserting the filter into a front end of the syringe body, so an arbitrary detachment of the filter part can be prevented when the liquid medicine is suctioned. 
         [0014]    To this end, a filter syringe of the present invention includes: a protruding part formed at a front end of a cylinder of a syringe body detachably provided thereon with a syringe needle fixing member to which a syringe needle is installed, an inserting part formed at a back end of the protruding part; a rib part protruding from an inner wall of the inserting part at a predetermined length to form a flow path; and a stepping surface formed at an upper end of the rib part. 
         [0015]    In addition, a filter part, which is inserted into the inserting part, includes a filter cover and a filter, wherein the filter cover has a predetermined length and includes a body having an inner space, a check wing formed at an end of the body, protruding to an outer circumference of the body, and seated on the step surface of the rib part, and a check valve formed by a step part at a center of an opposite end of the body, and the filter having a cup shape of a ∩ shape is inserted into and fixed to the inner space of the filter part. 
         [0016]    Therefore, when liquid medicine is suctioned, only the check wing is opened to open the flow path such that the liquid medicine is suctioned into the cylinder along with a foreign substance, and when the liquid medicine is injected, the check wing blocks the flow path and the check valve is opened such that the foreign substance is filtered by the filter so that only the liquid medicine is injected. 
         [0017]    In addition, the filter is installed in the inner space of the filter cover of the filter part, and due to the thickness of the body of the filter cover, a gap is formed at a side surface of the filter part so the pressure is dispersed by the gap thereby allowing ease of injection. 
         [0018]    Therefore, according to the present invention, the foreign substance can be filtered when the liquid medicine is suctioned and discharged by using only the syringe, the filter part is fixed to the syringe by a simple insertion, and the filter part is spaced apart from the inner wall of the inserting part of the syringe to form a gap such that resistance is uniformly applied to an entire part of the filter when the liquid medicine is injected, so the pressure is dispersed so that the syringe can be easily handled. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0019]      FIG. 1  is a sectional view showing a flow path formed by a rib part in an inserting part formed at a cylinder of a syringe of an embodiment of the present invention. 
           [0020]      FIG. 2  is a sectional view showing the flow path formed by the rib part of  FIG. 1 . 
           [0021]      FIG. 3  is a sectional view showing a filter part inserted into the inserting part of the syringe body of the present invention. 
           [0022]      FIG. 4  is an assembled perspective view showing a configuration of the syringe of the present invention. 
           [0023]      FIG. 5  is an exploded perspective view showing a configuration of the filter part of the present invention. 
           [0024]      FIG. 6  is a flow chart showing a flow of liquid medicine when suctioned and injected according to the present invention. 
           [0025]      FIGS. 7 and 8  are views showing the filter installed to a typical syringe needle, in which the filter is coupled to the syringe body. 
       
    
    
     DETAILED DESCRIPTION  
       [0026]    According to an embodiment of the present invention, a filter syringe includes: a protruding part formed at a front end of a cylinder of a syringe body detachably provided thereon with a syringe needle fixing member to which a syringe needle is installed, an inserting part formed at a back end of the protruding part; a rib part protruding from an inner wall of the inserting part in a predetermined length to form a flow path; a stepping surface formed at an upper end of the rib part; and a filter part, which is inserted into the inserting part, including a filter cover and a filter, wherein the filter cover has a predetermined length and includes a body having an inner space such that the filter cover is closely adhered to the inner wall of the inserting part of the cylinder of the syringe body, a check wing formed at an end of the body, protruding to an outer circumference of the body, and seated on the step surface of the rib part, and a check valve formed by a stepping part at a center of an opposite end of the body, and the filter having a cup shape is inserted into the inner space of the filter cover so that the filter is fixedly coupled to the filter cover while adhering to the filter cover without being arbitrarily detached from the filter cover. 
         [0027]    Hereinafter, an exemplary embodiment of the present invention is described in detail with reference to the accompanying drawings. 
         [0028]    The syringe of the present invention, as shown in  FIGS. 1 to 6 , includes: a protruding part  11  formed at a front end of a cylinder  10  of a syringe body detachably provided thereon with a syringe needle fixing member  30  to which a syringe needle  31  is installed, and an inserting part  12  formed at a back end of the protruding part  11 , wherein an inner side of the inserting part  12  is formed in a stepwise fashion with the protruding part  11 . 
         [0029]    In addition, a rib part  14  protrudes from an inner wall of the inserting part  12  in a predetermined length to form a flow path  13 , and a stepping surface  15  is slantly formed toward an inner side in the inner wall at an upper end of the rib part  14 , the stepping surface  5  is inclined inward and downward in such a manner that the syringe is easily opened when liquid medicine is suctioned and the filter is completely adhered to the syringe without separation when the liquid medicine is injected such that the liquid medicine easily flows when the liquid medicine is injected and no liquid medicine remain in the syringe. 
         [0030]    The flow path  13  is radially formed at a constant interval such that pressure is dispersed, and the rib part  14  forming the flow path  13  protrudes in such a manner that the inserting part  12  is stepped from the protruding part  11  coupled to the fixing member  30  of the syringe needle  31 . 
         [0031]    In this case, a depth of the flow path  13 , which is formed by the rib part  14  protruding in a predetermined interval, is formed such that the flow path  13  is completely covered when a check cover  20   a  of the filter part  20  covers the stepping surface  15  formed on an upper part of the rib part  14 . 
         [0032]    In other words, the depth of the flow path  13  is formed smaller than a protruding width of the check wing  23   a  of the filter part  20  such that the flow path  13  of the check wing  23   a  may be completely covered. 
         [0033]    In addition, the rib part  14  protruding in a predetermined length from the inner wall of the inserting part  12  is defined by multiple steps of the stepping surface  15  formed at the upper end of the inserting part  12  and a seating surface  16  formed at a lower end of the inserting part  12  so that when the filter cover  20   a  of the filter part  20  is press-fitted into the inserting part  12 , the check wing  23   a  formed on the filter cover  20   a  is adhered to the stepping surface  15  formed at the upper end of the inserting part  12  while the stepping part  24   a,  which is distinguished from the check valve  25   a  of the filter cover  20   a,  is adhered to the seating surface  16 , so the check valve  25   a  inserted into the inserting part  12  is exposed without being pressed so that an operation of the check valve  25   a  is not interrupted. 
         [0034]    The check valve  25   a  has a curved outer surface in such a manner that, when liquid medicine is suctioned, an external force is not transferred to the check valve  25   a.    
         [0035]    In addition, the flow path  13 , which is formed between the rib part  14 , is completely covered when the check wing  23   a  of the filter  20  covers the stepping surface  15  formed on the upper part of the rib part  14 . 
         [0036]    In addition, the filter part  20 , which is inserted into the inserting part  12 , having the described configuration includes a filter cover  20   a  constituted by an elastic material and a filter  20   b  having a predetermined hardness. 
         [0037]    In this case, the filter cover  20   a  has a predetermined length and includes a body  22   a  having an inner space  21  such that the filter cover  20   a  is closely adhered to the inner wall of the inserting part  12  of the cylinder of the syringe body, a check wing  23   a  formed at an end of the body  22   a,  protruding to an outer circumference of the body  22   a,  and seated on the stepping surface  15  of the rib part  14 , and a check valve  25   a  formed by a stepping part  24   a  at a center of an opposite end of the body  22   a,  and the filter  20   b  having a cup shape is inserted into the inner space  21   a  of the filter cover  20   a  so that the filter is fixedly coupled to the filter cover while closely adhering to the filter cover without being detached from the filter cover. 
         [0038]    In this case, the filter  20   b,  which is inserted into the inner space  21   a  of the filter cover, has a ∩ shape, in which an opened part is directed and inserted into the inner space  21   a  such that a front end  21   b  of the filter cover is closely adhered to a supporting surface  26   a  of the filter cover  20   a.    
         [0039]    In this case, a width of the supporting surface  26   a  and a width of the opened front end  21   b  of the filter  20   b  are identical so that resistance is not generated when the liquid medicine flows through the filter. 
         [0040]    In addition, the filter  20   b  is press-molded into a ∩ shape in a predetermined mold after a binder and a bead are make contact by pressure applied to the binder and the bead while a binder is coated on a small bead after the small bead is mixed with the binder so that the liquid medicine is filtered through a gap created between the beads. 
         [0041]    Thus, the inner wall of the body  22   a  of the filter cover  20   a  is closely adhered to the filter  20   b  so an arbitrary detachment does not occur. 
         [0042]    However, the filter  20   b  is precisely pressed into a ∩ shape by a press drawing scheme through using a net having a predetermined supporting strength, and in this case, the filter is not changed even when an interval of a mesh of the net is elongated, so an identical effect may be created even when the filter molded. 
         [0043]    In addition, when the filter  20   b  is inserted into the inner space  21   a  of the filter cover  20   a  in the ∩ shape, due to a thickness of the body  22   a  of the filter cover  20   a  and the protrusion of the rib part  14 , a gap space  1 , through which the liquid medicine may flow, is formed between the filter cover  20   a  and the inner wall of the inserting part  12  of the cylinder of the syringe body when the filter  20   b  is installed so the pressure is dispersed when the liquid medicine is injected, and the filter  20   b  is long so that the filter  20   b  protrudes to a backward direction even when the filter ( 20   b ) is inserted into and coupled to the inner space ( 21   a ) of the filter cover ( 20   a ) such that the filter  20   b  protrudes from the the inserting part  12  thus having an excellent dispersion of pressure. 
         [0044]    As described above, the filter cover  20   a  should have excellent elastic force and be hygienic, therefore, according to the present invention, silicon is used, however, various materials having identical characteristics with silicon may be used, and this does not limit the object of the present invention. 
         [0045]    In addition, by the elastic force of the filter cover  20   a,  when the filter  20   b  is coupled to the filter cover  20   a  and the filter cover  20   a  is inserted into the inserting part  12 , the filter  20   b  and the filter cover  20   a  are closely fixed. 
         [0046]    Therefore, when the liquid medicine is suctioned through the syringe needle  31 , the pressure is not transferred to the curved check valve  25   a  when the liquid medicine and the foreign substance is introduced through the protruding part, and when the pressure is generated through the flow path  13 , the flow path  13  is opened while the check wing  23   a  is pushed out so the liquid medicine is suctioned into the cylinder along with the foreign substance. In addition, when the liquid medicine is injected, the check wing  23   a  blocks the flow path  13  by a pressing force, the liquid medicine concentrates to a curved space  27   a  formed at a back of the check valve  25   a  through the filter  20   b  such that the check valve  25   a  is opened so only the foreign substance is filtered by the filter  20   b  and only the liquid medicine is injected through the check valve  25   a  through the filter  20   b.    
         [0047]    In this case, the liquid medicine is dispersed by the gap space  1 , by which the protrusion of the filter  20   b  and the protruded filter  20   b  are spaced apart from the inner wall of the inserting part  12 , so the syringe may inject the liquid medicine without pressure. 
         [0048]    In addition, the required liquid medicine may be simply inserted into the human body by using only the syringe even when used for a catheter, which does not require the syringe needle.

Technology Classification (CPC): 0