Abstract:
A syringe with a filter is disclosed. When liquid medicine for treatment such as an analgesic is suctioned into the syringe by using a syringe needle and then injected into a human body through the syringe needle, foreign substances generated in an ampule and the like are filtered in the syringe prior to the liquid medicine being injected into the human body as the foreign substances are suctioned into the syringe through the syringe needle. In addition, the filter is configured so that the filter can be installed into the syringe with ease.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims the benefit under §365(c) of an international application filed on Nov. 22, 2013 and assigned serial number PCT/KR2013/010669, which claims 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 disclosures of which are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The present disclosure 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 then 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 and when the foreign substances are suctioned into the syringe through the syringe needle. 
     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 via a catheter, and the filter is prevented from being detached from the syringe during suctioning and injecting through a simple insertion of the filter in the syringe. 
     BACKGROUND 
     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 a patient to treat infections by the injection. 
     However, an injection liquid to be injected to the patient is usually processed and stored as a powder for easy storage, and the powder is mixed with a liquid prior to use. In such 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 (particles) or plastic powders (particles) 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 (contaminants) are injected into the body. 
       FIG. 7  and  FIG. 8  illustrate related art syringe device  1 ′, in which a filter  5  is installed in a syringe needle fixing member  3 , and which is equipped with a detachable needle sharp  7  comprising a syringe needle and a syringe needle fixing member and detachably provided at a front end of the syringe, to filter foreign substances such as glass powders (particles) and the like when a mixed or a liquefied medicine is suctioned into a cylinder  8  of a syringe body by using a piston  9 . However, the needle sharp  7  used in this case is required to be exchanged before the liquid medicine is injected into the body, to prevent the foreign substance attached to the filter from being injected into a patient when the needle sharp  7  is not exchanged due to carelessness or by mistake. 
     In addition, when only the needle sharp  7  is exchanged, the syringe may be contaminated by surrounding pathogens (e.g., viruses), and the procedures of use are 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 adverse effects to the environment.  FIGS. 7 and 8  illustrate a safety cover  6  for being placed over the needle sharp  7 . 
     Specifically, medical wastes are separately classified and processed from normal wastes, thereby increasing the processing costs. 
     In addition, when installing the filter  5 , which is installed in the needle sharp  7 , because an inner area of the fixing member  3  to which the needle sharp  7  is installed is narrow (as illustrated in  FIG. 8 ), if the filter  5  is installed, the pressure in the needle sharp  7  becomes very high when injecting the liquid medicine due to a bottleneck. Therefore, a large amount of strength is required to press the piston  9  to inject the liquid medicine into the patient, resulting in discomfort to both doctors and patients, 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 patients may occur, thereby increasing the risk of safety accidents. 
     Therefore, to solve these problems, in the present disclosure, a bi-directional filter needle is installed at a fixing member of the syringe needle, wherein 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 problem. 
     SUMMARY 
     Therefore, according to various embodiments of the present disclosure, 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 in multipurpose applications and the filter part can filter only when the liquid medicine is injected into the body without filtering when the liquid medicine is suctioned. 
     In addition, the filter part is subject to less 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. 
     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. 
     To this end, a filter syringe of the present disclosure 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. 
     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 (preferably having a cup shape) is inserted into and fixed to the inner space of the filter part. 
     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 the foreign substance (e.g., glass or plastic particles/contaminants existing in an ampule), 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. 
     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 that the pressure is dispersed by the gap, thereby allowing ease of injection. 
     Therefore, according to the various embodiments of the present disclosure, the foreign substance can be filtered when the liquid medicine is suctioned and then 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, to disperse pressure so that the syringe can be more easily handled by the medical professionals. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a sectional view illustrating 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 disclosure. 
         FIG. 2  is a sectional view taken along line A-A′ illustrating the flow path formed by the rib part of  FIG. 1 . 
         FIG. 3  is a sectional view illustrating a filter part after being inserted into the inserting part of the syringe body of the present disclosure. 
         FIG. 4  is an assembled perspective view illustrating a configuration of the syringe of the present disclosure. 
         FIG. 5  is an exploded perspective view illustrating a configuration of the filter part of the present disclosure. 
         FIG. 6  is a flow chart illustrating a flow of liquid medicine when suctioned and injected according to the present disclosure. 
         FIGS. 7 and 8  are views illustrating the filter installed to a typical syringe needle, in which the filter is coupled to the syringe body. 
     
    
    
     DETAILED DESCRIPTION 
     According to various embodiments of the present disclosure, 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. 
     Hereinafter, various embodiments of the present disclosure are described in detail with reference to the accompanying drawings. 
     The syringe  1 , in an embodiment of the present disclosure, as illustrated in  FIGS. 1 to 6 , generally 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, (the syringe needle fixing member  30  and the syringe needle  31  form a detachable needle sharp  7 , as illustrated in  FIG. 4 ), and an inserting part  12  (as illustrated in  FIGS. 1 and 4 ) 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 . 
     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 slantingly formed toward an inner side in the inner wall at an upper end of the rib part  14 , the stepping surface  15  is inclined inwardly and downwardly in such a manner that the syringe  1  is easily opened when liquid medicine is suctioned and the filter  20   b  is completely attached to the syringe  1  without separation when the liquid medicine is injected, such that the liquid medicine can easily flow when the liquid medicine is injected and no liquid medicine remain in the syringe. 
     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 needle sharp  7 . 
     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 filter cover  20   a  of the filter part  20  (illustrated in  FIG. 5 ) covers the stepping surface  15  formed on an upper part of the rib part  14 . 
     In other words, the depth of the flow path  13  is formed to be 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. 
     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 that 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. 
     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.    
     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 . 
     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. 
     In this case, the filter cover  20   a  has a predetermined length and includes a body  22   a  having an inner space  21   a  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. 
     In this case, the filter  20   b , which is inserted into the inner space  21   a  of the filter cover, has a cup 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  20   a  is closely adhered to a supporting surface  26   a  of the filter cover  20   a.    
     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. 
     In addition, the filter  20   b  is press-molded into a cup 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. 
     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. 
     However, the filter  20   b  is precisely pressed into a cup 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. 
     In addition, when the filter  20   b  is inserted into the inner space  21   a  of the filter cover  20   a  in the cup 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   a , 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 inserting part  12  thus having an excellent dispersion of pressure. 
     As described above, the filter cover  20   a  should have excellent elastic force and be hygienic, therefore, according to the present disclosure, silicon is used, however, various materials having identical characteristics with silicon may be used, and this does not limit the object of the present disclosure. 
     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. 
     Therefore, when the liquid medicine is suctioned through the syringe needle  31  (i.e., when the piston  9  is pulled or pushed inside the cylinder  10 ), 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 that the liquid medicine is suctioned into the cylinder along with the foreign substance (as illustrated in an upper portion of  FIG. 6 ). 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 (pressurizes) on a curved space or portion  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 that only the foreign substance (e.g., glass and plastic contaminants that may exist in an ampule or the cylinder  10  of the syringe  1 ) is filtered by the filter  20   b  and only the liquid medicine is injected through the check valve  25   a  after being filtered by the filter  20   b  (as illustrated in a lower portion of  FIG. 6 ). 
     In this case, the liquid medicine is dispersed by the gap space  1   a  (illustrated in  FIGS. 5 and 6 ), 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  1  may inject the liquid medicine without counter pressure. 
     In addition, the required liquid medicine, filtered in the manner above, may be delivered into the human body via a catheter, a syringe needle, or a combination thereof. 
     While the present disclosure has been shown and described with reference to various embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents.