JP4847252B2 - Luer connector connection structure and male connector used for it - Google Patents

Description

  The present invention relates to a connection structure for a luer connector that allows two tubes to communicate with each other via a detachable male connector and a female connector, and a male connector used therefor.

  2. Description of the Related Art Conventionally, a liquid such as a drug solution or blood is supplied to a patient using an infusion line or a transfusion line provided with a tube. In such a case, a luer connector comprising a male connector and a female connector that are connected to the ends of each tube constituting an infusion line or the like and communicated with each other is used ( For example, see Patent Document 1).

An elastic silicone sealing body is attached to an opening portion of the female luer connector included in the luer connector, and a spike portion having a sharp tip is disposed in the silicone sealing body. The spike portion has a flow channel formed therein, an opening formed in the vicinity of the distal end, and a medical tube connected to the flow channel connected to the proximal end portion. When the male luer member of the male luer connector presses the tip opening of the female luer connector, the elastic silicone sealing body is opened and connected to the male luer member.
JP 7-505064 gazette

  However, in the above-described conventional luer connector, the female luer connector is provided with a normally closed silicone sealing body, but the male luer connector is not provided with such a valve mechanism. This is because prior to connecting the male luer connector to the female luer connector, a pretreatment (priming) for filling the flow path in the male luer connector with a liquid is performed. As described above, the conventional luer connector described above is configured such that the tip of the male luer connector is opened and comes into contact with air, so that there is a possibility that bacteria may propagate in the tip opening of the male luer connector.

  Further, in actual priming, in order to completely fill the male luer connector with the chemical solution, the male luer connector is filled until the chemical solution is spilled, and the filling is stopped at the spilled stage. For this reason, the problem that a part of chemical | medical solution is consumed wastefully also arises. In addition, during priming, chemical liquid may spill from the tip opening of the male luer connector, and there is a possibility that bacteria may propagate on the portion of the male luer connector to which the spilled chemical liquid has adhered.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a luer connector connection structure capable of preventing the growth of bacteria and preventing wasteful consumption of a chemical solution, and a male connector used therefor There is to do.

In order to achieve the above-described object, the structural features of the connection structure of the luer connector according to the present invention include a male connector connected to the end of one tube and an end of the other tube. This is a luer connector connection structure that allows one tube body and the other tube body to communicate with each other by detachably engaging the female connector, and the male connector is connected to one tube body. A male connector body having a proximal end connecting portion and a cylindrical distal end supporting portion extending forward from the proximal end connecting portion; and a distal end supporting portion of the distal end supporting portion with the distal end portion protruding from the distal end of the distal end supporting portion. A male luer member formed in a taper shape in which the outer peripheral surface of the distal end side portion is provided so as to be slidable in the axial direction and gradually decreases from the portion located on the proximal end connecting portion side toward the distal end side, and the male side Proximal connection inside the connector body An elastic sealing member having a stretchable hole which is open by the pressure of the installed male luer member so as to close the flow path of the male-side connector main body near the boundary portion between the tip support portion and, on the outer peripheral surface of the male luer member It is provided on the rear side of the distal end side portion, and is configured with an entry restriction projection that abuts the distal end portion of the distal end support portion and regulates the entry of the male luer member to the proximal end coupling portion side . The peripheral surface is formed into a tapered surface that can be fluid-tightly contacted with the outer peripheral surface of the male luer member, and the male luer member is inserted into the female connector to engage with the inner peripheral surface of the female connector. to be able to open the stretchable hole of the elastic seal member by the pressing of the female connector through the male luer member with an outer peripheral surface of the male luer member can be fluid-tight contact, and female connector When the inner peripheral surface and the outer peripheral surface of the male luer member are in fluid-tight contact with each other, and the expansion hole portion of the elastic seal member is opened by the pressure of the male luer member, the entry restriction projection contacts the distal end portion of the distal end support portion. This is because the male luer member comes into contact with it and stops .

  In the connection structure of the luer connector according to the present invention configured as described above, the male connector body of the male connector is supported by the base end connecting portion connected to one pipe body and the male luer member on the inner peripheral surface. And a tip support portion. A male luer member for communicating with the female connector is provided slidably in the axial direction inside the tip support portion with the tip side portion protruding from the tip portion of the tip support portion. In addition, an elastic seal member having an expansion / contraction hole is provided in the vicinity of the boundary between the proximal end coupling portion and the distal end support portion inside the male connector body so as to block the flow path in the male connector body. Yes.

  Therefore, when the male connector and the female connector are not connected, no external force is applied to the elastic seal member, and the expansion / contraction hole of the elastic seal member is closed. The inner flow path is closed. For this reason, when performing priming, the chemical solution in the flow path of the male connector does not spill outside from the tip opening of the male luer member beyond the elastic seal member. As a result, it is possible to prevent the chemical solution from spilling and adhering to the outer surface of the male connector, and the bacteria from propagating from the attached portion. In addition, there is no need to spill chemical solutions.

  Further, the distal end portion of the outer peripheral surface of the male luer member is formed into a curved surface having a taper that gradually becomes thinner on the distal end side than the portion (rear end side portion) located on the proximal end connecting portion side. The inner peripheral surface of the side connector is formed into a curved surface having a taper that can be fluid-tightly contacted with the distal end portion of the outer peripheral surface of the male luer member. Then, by inserting the distal end portion of the male luer member into the female connector and engaging the female connector with the male luer member, the inner peripheral surface of the female connector and the outer peripheral surface of the male luer member are liquid-tight. At that time, the elastic seal member is pushed by the male luer member by the pressing of the female connector so that the expansion / contraction hole is opened.

That is, when the male luer member is inserted into the female connector and the inner peripheral surface of the female connector and the distal end portion of the outer peripheral surface of the male luer member are in fluid-tight contact, the male luer member is It is configured to open the expansion / contraction hole of the elastic seal member by being pushed by the connector. Thereby, since one tube body and the other tube body communicate with each other via the male connector and the female connector, a liquid such as a chemical solution can flow. At that time, the opening of the expansion / contraction hole of the elastic seal member is set to a size necessary for allowing the liquid to pass through in an appropriate state.
Furthermore, by providing an entry restricting protrusion, when connecting the male connector and the female connector, the male luer member is prevented from entering the proximal end side of the tip support portion more than necessary, and the male luer is prevented. The member can be stopped at an appropriate position. As a result, the expansion / contraction hole of the elastic seal member can be appropriately opened, and the male connector and the female connector can be communicated in good condition.

  In addition, another structural feature of the luer connector connection structure according to the present invention is that when the female connector via the male luer member is released, the male luer member is pushed back by the restoring force of the elastic seal member. This is because the telescopic hole is closed.

  According to this, when the male connector and the female connector are removed, the expansion / contraction hole is closed, so that the flow path in the male connector body is closed. For this reason, when the male connector and the female connector are removed, the chemical solution in the flow path does not spill from the front end opening of the male connector. As a result, it is possible to prevent the chemical liquid from spilling and adhering to the outer surface of the male connector, causing the bacteria to propagate from the adhering portion and the chemical liquid to be spilled and wasted. Similarly, even before the male connector and the female connector are connected, the expansion / contraction hole of the elastic seal member is kept closed.

  Further, another structural feature of the connection structure of the luer connector according to the present invention is that the inner diameter of the proximal end coupling portion at the boundary portion between the proximal end coupling portion and the distal end support portion is set larger than the inner diameter of the distal end support portion. In addition, a protrusion restriction that restricts the male luer member from coming out of the front end of the front end support portion by contacting the base end side portion of the front end support portion at a portion of the outer peripheral surface of the male luer member located on the base end connecting portion side. When the elastic seal member pushes back the male luer member forward and closes the telescopic hole by releasing the female connector via the male luer member, the protrusion regulating projection is The male luer member stops in contact with the end portion.

  According to this, when the male connector and the female connector are not connected, the male luer member is prevented from protruding beyond the front side of the tip support part or coming off the front side of the tip support part more than necessary. it can. Also, when the elastic seal member pushes back the male luer member forward and closes the expansion / contraction hole portion, the protrusion restricting projection comes into contact with the proximal end portion of the distal end support portion so that the male luer member stops. The male luer member is prevented from moving backward by the elasticity of the elastic seal member, and is prevented from moving forward by the proximal end side portion of the distal end support portion. For this reason, the male luer member is kept stationary without rattling. At this time, the elastic seal member comes into contact with the rear end portion of the male luer member, so that the expansion / contraction hole is more reliably closed.

  Further, another structural feature of the connection structure of the luer connector according to the present invention is that the lock ring having an internal thread formed on the inner peripheral surface is rotatable about the axis on the outer peripheral side of the male luer member. Attached to the outer peripheral surface of the tip support part, a screw engagement part is formed on the outer peripheral surface of the female connector, and the male and female connectors can be connected by engaging the female screw and the screw engagement part. It is to have done.

  According to this, by inserting a male luer member into the female connector and engaging the female screw with the screw engaging portion, the female connector enters the inner side of the lock ring, and the female connector When the peripheral surface and the outer peripheral surface of the male luer member are in fluid-tight contact, the elastic hole of the elastic seal member is pushed by the female connector to open. For this reason, the male connector and the female connector are firmly connected. In addition, the screw engaging part in this case may be comprised with an external thread, and may be comprised with the protrusion which can be engaged with an internal thread by rotating with respect to an internal thread.

  Further, as described above, by providing the entry restricting protrusion on the outer peripheral surface of the male luer member, the female screw and the screw engaging portion are strongly tightened, and the female connector or the lock ring is cracked, or the female screw and the screw engaging portion are engaged. It can be prevented that the tightening with the joint portion is too loose and a gap is formed between the lock ring and the female connector, and leakage of the chemical solution is caused from this gap. In this case, when the abutment restricting projection comes into contact with the distal end portion of the distal end support portion, the tightening degree between the female screw and the screw engaging portion does not become too strong or weak, and becomes an appropriate strength, and leakage also occurs. It is provided at a position where there is no state.

Further, the structural feature of the male connector according to the present invention is that the male connector includes a proximal end connecting portion connected to one tube body and a cylindrical distal end support portion extending forward from the proximal end connecting portion. A portion in which the main body and the distal end portion are projected from the distal end of the distal end support portion so as to be slidable in the axial direction inside the distal end support portion, and the outer peripheral surface of the distal end side portion is located on the proximal end coupling portion side A male luer member that is formed in a tapered shape that gradually narrows from the tip end side to the tip side and that can be fluid-tightly contacted with the tapered inner peripheral surface of the female connector, and a base inside the male connector main body. Installed in the vicinity of the boundary between the end connecting portion and the tip support portion so as to block the flow path in the male connector body, and a male luer member is inserted into the female connector so that the inner peripheral surface of the female connector and the male luer member When the outer peripheral surface is brought into liquid-tight contact with the male An elastic sealing member having a stretchable hole that opens by pushing the female connector through the over member, provided on the rear side of the distal portion of the outer peripheral surface of the male luer member, and the inner peripheral surface of the female connector When the male luer member comes into liquid-tight contact with the male luer member and when the expansion / contraction hole of the elastic seal member is opened by pressing the male luer member, the male luer member is stopped by abutting against the distal end portion of the distal end support portion. Thus, the male luer member is configured with an entry restricting protrusion that restricts entry of the male luer member toward the proximal end connecting portion .

  According to this, it is preferable that one tube body and the other tube body can communicate with each other by being detachably engaged with a female connector connected to one tube body and connected to the other tube body. A male connector can be obtained.

  Hereinafter, a luer connector connection structure according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an infusion line set 10 having a luer connector connection structure 20 according to the embodiment. The infusion line set 10 is for supplying a medical solution or the like to a patient's body, and includes an infusion tube 11, a roller clamp 12, a three-way cock 13 and the like. The drip tube 11 temporarily stores a chemical solution or the like inside and sends the chemical solution or the like to the roller clamp 12 through the tube 14 by a predetermined amount. The roller clamp 12 is used to adjust the flow rate of a chemical solution or the like flowing through the tube 14.

  Further, the three-way stopcock 13 is used for flowing the chemical solution sent from the drip tube 11 to the downstream side or stopping the flow, and is used for injecting another chemical solution into the infusion line set 10. That is, the three-way stopcock 13 has three flow paths, and the chemical liquid sent from the drip tube 11 flows through the two flow paths to the downstream side, and another chemical liquid is injected inside through the other flow path. Can do. A luer connector connection structure 20 is provided downstream of the three-way cock 13 via tubes 15 and 16.

  The luer connector connection structure 20 is attached to the female connector 21 attached to the distal end portion of the tube 16 as the other tubular body of the present invention and to the distal end portion of the tube 15 as the one tubular body of the present invention. It is composed of a male connector 22. As shown in FIGS. 2 and 3, the female connector 21 has a cylindrical female connector main body 23 and a cylindrical shape extending rearward from the rear end (base end) of the female connector main body 23. And the connecting portion 24. And the screw engaging part 25 which consists of a pair of protrusion is provided in the front-end | tip part in the outer peripheral surface of the female side connector main body 23 at intervals in the circumferential direction.

  Further, the inner peripheral surface 21a of the female connector main body 23 is formed in a gentle taper shape in which the diameter on the opening side is large and the diameter decreases toward the back side. The connection portion 24 is formed to be thinner than the female connector main body 23, and the distal end portion of the connection portion 24 is connected to the front side slightly from the base end portion on the inner surface of the female side connector main body 23. Therefore, a gap 24 a is formed between the inner peripheral surface of the proximal end portion of the female connector main body 23 and the outer peripheral surface of the female connector main body 23 side portion of the connection portion 24. The female connector 21 is connected to the tube 16 by engaging the tip of the tube 16 with the gap 24 a. That is, the connecting portion 24 enters the inside of the tube 16, and the proximal end portion of the female connector main body 23 is fixed by being sandwiched between the connecting portion 24 with the distal end portion of the tube 16 being put inside.

  The male connector 22 includes a male connector main body 26 formed in a substantially cylindrical shape, a male luer member 27 provided on the inner front end side of the male connector main body 26, and an outer periphery on the front end side of the male connector main body 26. The lock ring 28 is attached, and an elastic seal member 29 is provided on the inner center side of the male connector body 26. The male connector main body 26 includes a substantially cylindrical base end connecting portion 31 whose diameter gradually increases from the base end side portion connected to the tube 15 toward the front end side, and a tip end portion of the base end connecting portion 31. It is comprised with the step-shaped cylindrical front-end | tip support part 32 extended ahead. Here, for convenience of explanation, in the female connector 21, the left side in FIGS. 1 to 3 is the rear or base end side, the right side is the front or front end side, and the male connector 22 is in FIGS. The left side is the front or tip side, and the right side is the back or base side.

  The inside of the base end connection part 31 is formed in the flow path 31a for letting a chemical solution pass, and the front end side part is formed in the space part 31b with a large diameter. Further, a ring-shaped fixing recess 31c extending from the rear side toward the distal end side is formed in the outer peripheral side portion of the flow path 31a in the rear side portion of the proximal end connecting portion 31, and a tube is formed in the fixing recess 31c. The proximal end connecting portion 31 is connected to the tube 15 by engaging the 15 distal end portions. An assembling step 31d having a smaller outer diameter is formed on the outer periphery of the distal end of the base end connecting portion 31.

  The distal end support portion 32 includes a large-diameter fixed portion 33 that is fixed to the step portion 31 d of the proximal end coupling portion 31, and a small-diameter support portion 34 that extends forward from the distal end center of the fixed portion 33. The fixed portion 33 is formed with a small-diameter portion 33b in which both the diameter and the axial length are set smaller than the large-diameter portion 33a inside the large-diameter portion 33a that is fixed with the step portion 31d inside. Configured. The large-diameter portion 33a and the small-diameter portion 33b are connected at the front end portion, and the rear end portion is open.

  And the elastic seal member 29 is attached in the state which inserted the peripheral part between the large diameter part 33a and the small diameter part 33b. That is, the peripheral edge of the elastic seal member 29 is inserted between the large diameter portion 33a and the small diameter portion 33b, the elastic seal member 29 is attached to the fixed portion 33, and the large diameter portion 33a of the fixed portion 33 is in that state. The elastic seal member 29 is fixed between the fixing portion 33 and the base end connecting portion 31 by inserting the step portion 31 d of the base end connecting portion 31 and fixing the fixing portion 33 to the base end connecting portion 31. .

  In this case, the portion of the elastic seal member 29 located on the opening side between the large-diameter portion 33a and the small-diameter portion 33b is pressed by the tip end portion of the step portion 31d, and between the large-diameter portion 33a and the small-diameter portion 33b. It is prevented from coming off. The elastic seal member 29 is made of a plate-like rubber having elasticity and stretchability, and an expansion / contraction hole 29a that opens and closes by expanding and contracting is formed in the center thereof.

  For this reason, the elastic seal member 29 expands by applying a predetermined pressing force to the front surface to open the expansion / contraction hole 29a, and contracts by releasing the pressing force to close the expansion / contraction hole 29a. When the telescopic hole 29a is closed, the flow path 31a in the proximal end connecting portion 31 is blocked and the chemical solution does not flow. Further, a small conical protrusion 29b protruding rearward is formed at the central portion (the peripheral portion of the expansion / contraction hole 29a) on the rear surface of the elastic seal member 29. The protrusion 29b disperses the pressure applied to the central portion of the elastic seal member 29 when the flow path 31a is filled with a chemical solution, thereby improving the pressure resistance of the elastic seal member 29.

  The support portion 34 is formed in a cylindrical shape slightly narrower than the small diameter portion 33b of the fixed portion 33, and a step portion 34a is formed between the inner peripheral surface of the support portion 34 and the inner peripheral surface of the small diameter portion 33b. . In addition, a slide recess 34b having an outer diameter slightly smaller than that of the tip end portion is formed on the outer peripheral surface of the support portion 34 except for the tip end portion. A cylindrical male luer member 27 is attached in the support portion 34 so as to be slidable in the axial direction. The distal end portion 27 a of the male luer member 27 is formed so as to be in fluid-tight contact with the inner peripheral surface 21 a of the female connector main body 23. That is, the distal end side portion 27a of the male luer member 27 is formed in a cylindrical shape having a gradual taper whose diameter decreases from the proximal end side toward the distal end side.

  Further, the rear end portion of the male luer member 27 is formed in a cylindrical shape having a constant outer diameter that is in sliding contact with the inner peripheral surface of the support portion 34, and a protrusion 27b as a protrusion restricting protrusion of the present invention at the rear end thereof. Is formed along the circumference. The protrusion 27b is formed to have a size that fits into the small diameter portion 33b, and is movable in the axial direction within the fixed portion 33. Further, the protrusion 27b cannot enter the support portion 34. When the male luer member 27 moves forward with respect to the support portion 34, the protrusion 27b contacts the step portion 34a and the male luer member 27 moves. The luer member 27 is stopped. 2 and 3 show the state at that time. In this case, the elastic seal member 29 closes the expansion / contraction hole 29a in a state where the elastic seal member 29 is in contact with the rear end face of the male luer member 27. FIG.

  Further, a small protrusion 27c as an entry restricting protrusion of the present invention is formed along the circumference on the rear end side portion of the front end side portion 27a on the outer peripheral surface of the male luer member 27. Therefore, as shown in FIGS. 4 and 5, when the female connector 21 and the male connector 22 are connected, the male luer member 27 is pushed to the rear side of the support portion 34 by the female connector 21. Although it moves, when the protrusion 27 c comes into contact with the tip of the support portion 34, the male luer member 27 does not move further to the rear side of the support portion 34. In this state, the inner peripheral surface 21a of the female connector 21 and the distal end portion 27a of the male luer member 27 are in fluid-tight contact with each other, and the elastic seal member 29 is pressed by the male luer member 27 to expand and contract. The part 29a is opened.

  The lock ring 28 is formed in a substantially cylindrical shape capable of accommodating the distal end portion of the female connector 21 therein, and has a small diameter on the proximal end portion 28a side. That is, the lock ring 28 is set to a size that allows the distal end portion of the female connector 21 to be inserted between the lock lure member 27 and the base end portion 28 a slides into the recess 34 b of the support portion 34. Engage as possible. For this reason, the lock ring 28 is rotatable in the direction around the axis with respect to the support portion 34 and is also movable in the axial direction of the support portion 34.

  A female screw 35 that can be engaged (screwed) with the screw engaging portion 25 of the female connector 21 is formed from the distal end portion on the inner peripheral surface of the lock ring 28 to the central portion in the axial direction. An anti-slip protrusion 36 extending in the axial direction is formed on the outer peripheral surface of the lock ring 28 at a constant interval in the circumferential direction. The female connector 21, the male connector main body 26 and the lock ring 28 are made of polycarbonate, and the male luer member 27 is made of polypropylene.

  When connecting the female connector 21 and the male connector 22 in the connection structure 20 of the luer connector configured as described above, first, priming is performed, and the chemical solution is filled in the flow path 31a. As shown in FIG. 2 and FIG. 3, the front end opening of the female connector 21 and the front end opening of the male connector 22 are opposed to each other. Next, after the male luer member 27 is positioned inside the female connector 21 and the female screw 35 of the lock ring 28 and the screw engaging portion 25 of the female connector 21 are brought into contact with each other, the lock ring 28 is moved to a predetermined position. The female screw 35 and the screw engaging portion 25 are screwed together by rotating in the direction around the axis.

  When the female screw 35 and the screw engaging portion 25 are properly screwed together, the inner peripheral surface 21a of the female connector 21 and the distal end portion 27a of the male luer member 27 are connected as shown in FIG. Liquid-tight contact is made and the elastic hole 29a of the elastic seal member 29 opens. As a result, the female connector 21 and the male connector 22 communicate with each other in an appropriate connection state in which liquid leakage does not occur. When the infusion line set 10 is used, the downstream end of the tube 16 is connected to a puncture member (not shown) such as an indwelling needle that punctures the patient's body for placement.

  Next, after flowing the chemical solution from the drip tube 11 into each of the tubes 14, 15, and 16, the air in the female connector 21 and the tube 16 is discharged to the outside, and then the roller clamp 12 is adjusted to adjust the flow of the chemical solution. Stop. In this state, the puncture member is punctured at a predetermined site in the patient's body and the roller clamp 12 is adjusted so that the flow rate of the chemical flowing through the tube 14 and the like becomes an appropriate amount. As a result, a predetermined constant flow rate of the medical solution is supplied from the drip tube 11 into the patient's body.

  As described above, in the luer connector connection structure 20 according to this embodiment, when the male connector 22 and the female connector 21 are not connected, the elastic seal member 29 causes the flow path in the male connector main body 26 to flow. 31a is closed. For this reason, the chemical solution in the male connector 22 does not spill outside from the front end opening of the male luer member 27. As a result, it is possible to prevent the chemical liquid from spilling and adhering to the outer surface of the male connector 22 and causing bacteria to propagate from the adhering portion. In addition, there is no need to spill chemical solutions.

  Further, by inserting the male luer member 27 into the female connector 21, the inner peripheral surface 21a of the female connector 21 and the outer peripheral surface of the male luer member 27 come into liquid-tight contact, and at that time, an elastic seal member 29 is pushed by the male luer member 27, and the telescopic hole 29a is opened. For this reason, a chemical | medical solution can be poured with a moderate flow volume, without leaking a chemical | medical solution outside. Even when the male connector 22 and the female connector 21 are removed, the expansion hole 29a is closed, so that the flow path 31a in the male connector body 26 is closed. For this reason, when the male connector 22 and the female connector 21 are removed, the chemical solution does not spill from the front end opening of the male luer member 27.

  Furthermore, since the protrusions 27b and 27c are provided on the outer peripheral surface of the male luer member 27, it is possible to prevent the male luer member 27 from protruding more forward than necessary and entering the rear side. Further, when the elastic seal member 29 urges the male luer member 27 forward to close the telescopic hole 29a, the projection 27b contacts the rear end side portion of the support portion 34. It becomes possible to maintain a stationary state without rattling. Further, when the male connector 22 and the female connector 21 are connected, the male luer member 27 stops at an appropriate position, so that the elastic hole 29a of the elastic seal member 29 can be appropriately opened. The male connector 22 and the female connector 21 can be communicated in a good state.

  6 and 7 show a luer connector connection structure 40 according to a modification of the above-described embodiment. In this luer connector connection structure 40, the protrusion 47 b formed on the rear end portion of the outer peripheral surface of the male luer member 47 is formed of a small protrusion, and is formed on the rear side of the front end side portion 47 a on the outer peripheral surface of the male luer member 47. The projection 47c formed is a large flange-like projection. The rest of the configuration of the luer connector connection structure 40 is the same as that of the luer connector connection structure 20 described above. Accordingly, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  Since it comprised in this way, when attaching the male luer member 47 in the support part 34, the male luer member 47 can be pushed in from the front side of the support part 34 to the rear side. In this case, the protrusion 47 b passes through the support portion 34 so as to be crushed and protrudes toward the rear side of the support portion 34. When protruding to the rear side of the support portion 34, the protrusion 47b returns to the original state and prevents the male luer member 47 from coming out of the support portion 34. In the luer connector connection structure 20 described above, the male luer member 27 is attached to the support portion 34 by being pushed in from the rear side of the support portion 34 toward the front side. Other effects of the luer connector connection structure 40 are the same as those of the luer connector connection structure 20 described above.

  Moreover, the luer connector connection structure and the male connector used therefor according to the present invention are not limited to the above-described embodiments, and can be implemented with appropriate modifications. For example, in the above-described embodiment, the connection structure of the luer connector is provided in the infusion line set 10 provided with the drip tube 11, but this connection structure of the luer connector is used for the infusion line, the blood transfusion line, and other purposes. It can utilize also for connecting each tube member used. Further, the configuration of each part of the connection structure of the luer connector according to the present invention, materials used, and the like can be appropriately changed within the technical scope of the present invention.

It is the block diagram which showed the infusion line set provided with the connection structure of the lure connector which concerns on one Embodiment of this invention. It is the side view which showed the connection structure of the lure connector before connecting a female side connector and a male side connector. It is sectional drawing which showed the connection structure of the luer connector before connecting a female side connector and a male side connector. It is the side view which showed the state which connected the female side connector and the male side connector. It is sectional drawing which showed the state which connected the female connector and the male connector. It is sectional drawing which showed the state before connecting the female side connector and male side connector with which the connection structure of the luer connector which concerns on a modification is provided. It is sectional drawing which showed the state which connected the female side connector and male side connector with which the connection structure of the lure connector which concerns on a modification is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15,16 ... Tube, 20, 40 ... Luer connector connection structure, 21 ... Female side connector, 21a ... Inner peripheral surface, 22 ... Male side connector, 25 ... Screw engaging part, 26 ... Male side connector main body, 27, 47 ... male luer member, 27a, 47a ... distal end portion, 27b, 27c, 47b, 47c ... projection, 28 ... lock ring, 29 ... elastic seal member, 29a ... expansion / contraction hole, 31 ... proximal end coupling portion, 32 ... Tip support portion 34... Support portion 34 a. Step portion 35.

Claims (5)

By detachably engaging a male connector connected to the end of one tube and a female connector connected to the end of the other tube, the one tube and the other tube A connection structure of a luer connector capable of communicating with the body,
The male connector,
A male connector body including a base end connecting portion connected to the one tubular body and a cylindrical tip support portion extending forward from the base end connecting portion;
A portion in which the distal end portion is slidable in the axial direction inside the distal end support portion with the distal end portion protruding from the distal end of the distal end support portion, and the outer peripheral surface of the distal end side portion is located on the proximal end connecting portion side A male luer member formed in a tapered shape gradually becoming thinner from the tip side,
An expansion hole that is installed in the vicinity of the boundary between the base end connecting portion and the distal end support portion inside the male connector main body so as to close the flow path in the male connector main body and is opened by pressing the male luer member An elastic seal member having a portion ;
An entry restriction that is provided on the rear side of the distal end portion of the outer peripheral surface of the male luer member and abuts against the distal end portion of the distal end support portion to restrict the entry of the male luer member toward the proximal end connecting portion. It is composed of protrusions and
The inner peripheral surface of the female connector is formed into a tapered surface that can be fluid-tightly contacted with the outer peripheral surface of the male luer member,
By inserting and engaging the male luer member in the female connector, the inner peripheral surface of the female connector and the outer peripheral surface of the male luer member can be brought into liquid-tight contact and the male luer member stretch hole of the elastic seal member to be able to be opened by pushing the female connector through the, and
When the inner peripheral surface of the female connector and the outer peripheral surface of the male luer member are in fluid-tight contact with each other, and the elastic hole is opened by the pressing of the male luer member, the entry restriction protrusion The luer connector connection structure, wherein the male luer member stops by abutting against the distal end portion of the distal end support portion .   2. The expansion and contraction hole according to claim 1, wherein when the pressing of the female connector via the male luer member is released, the male luer member is pushed back by the restoring force of the elastic seal member to close the telescopic hole portion. Luer connector connection structure. An inner diameter of the proximal end coupling portion at a boundary portion between the proximal end coupling portion and the distal end support portion is set to be larger than an inner diameter of the distal end support portion, and the proximal end connection portion side of the outer peripheral surface of the male luer member A protrusion restricting protrusion that restricts the male luer member from coming out of the front end of the front end support portion in contact with the base end side portion of the front end support portion.
When the elastic seal member is released from the pressing of the female connector via the male luer member and pushes the male luer member forward to close the telescopic hole portion, the protrusion restricting projection is the tip support portion. The luer connector connection structure according to claim 2, wherein the male luer member stops in contact with a base end side portion of the lure. A lock ring having an internal thread formed on the inner peripheral surface is attached to the outer peripheral surface of the tip support portion in a state of being rotatable in the direction around the axis on the outer peripheral side of the male luer member, and screwed to the outer peripheral surface of the female connector Forming an engagement part,
The luer connector connection structure according to any one of claims 1 to 3 , wherein the male connector and the female connector can be connected by engaging the female screw and the screw engaging portion. . By detachably engaging a male connector connected to the end of one tube and a female connector connected to the end of the other tube, the one tube and the other tube A male connector used in a connection structure of a luer connector capable of communicating with the body ,
A male connector body including a base end connecting portion connected to the one tubular body and a cylindrical tip support portion extending forward from the base end connecting portion;
The distal end portion is provided to be slidable in the axial direction inside the distal end support portion with the distal end portion protruding from the distal end of the distal end support portion, and the outer peripheral surface of the distal end side portion is located on the proximal end coupling portion side. A male luer member that is formed in a tapered shape that gradually narrows from the portion toward the distal end side and that can be liquid-tightly contacted with the tapered inner peripheral surface formed on the female connector;
The male luer member is installed in the female connector so as to close the flow path in the male connector main body in the vicinity of the boundary between the base end connecting portion and the tip support portion in the male connector main body. When the inner peripheral surface of the female connector and the outer peripheral surface of the male luer member are brought into liquid-tight contact with each other, an expansion hole is provided that is opened by pressing the female connector via the male luer member. An elastic sealing member ,
Provided on the rear side of the tip side portion of the outer peripheral surface of the male luer member, the inner peripheral surface of the female connector and the outer peripheral surface of the male luer member are in fluid-tight contact with each other, When the expansion / contraction hole of the elastic seal member is opened by pressing, the male luer member enters the base end connecting portion side by contacting the distal end portion of the distal end support portion and stopping the male luer member. A male connector characterized in that it is composed of an entry restriction protrusion that restricts the movement.

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