JP2012034738A - Medical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly cause loosening of screwing by a screw and to suppress local projection in a radial direction when screw lock connection is made, in a case where three types of connection including slip connection, screw lock connection, and pawl lock connection can be carried out.SOLUTION: An adaptor 50 is removably provided to a male luer assembly 11 where a lock nut 30 is arranged around a male luer 20 so as to be rotatable. The adaptor includes: a cylindrical part 51 to which the distal end of the male luer is inserted; an insertion part 56 which communicates with the cylindrical part and can be inserted to the slit of an elastic partitioning member of a needleless port; engagement pawls 67 which can be engaged with engagement projections formed on the outer peripheral surface of the needleless port; grip parts 60 which covers at least a part of the outer peripheral surface of the lock nut, and an engagement structure 53 which is engaged with the lock nut.

Description

  The present invention relates to a medical connector used for various medical devices, infusion containers, liquid delivery devices, and the like.

  When a patient is transfused or transfused, or when extracorporeal blood circulation is performed during surgery, it is necessary to form a route (transport line) for transporting a liquid substance such as a drug solution or blood. The transportation line is generally formed by connecting containers, various instruments, tubes, and the like. Connectors are used to connect different members.

  As such a connector, there is known a connector comprising a male luer whose outer peripheral surface is a tapered surface and a female luer whose inner peripheral surface is a tapered surface, and the male luer is inserted into the female luer and the two tapered surfaces are in close contact with each other. It has been. In general, such a connector is called a “slip type” connector, and its connection method is called “slip connection”. In ISO 594-1, the shape of each tapered surface of the male luer and female luer constituting the slip connector is defined.

  There is known a “screw lock type” connector in which a male luer and a female luer constituting a slip-type connector are further fixed by screw connection, thereby connecting the two more firmly and securely. In the screw lock type connector, a substantially cylindrical lock nut is provided to be rotatable around the male luer. A female thread is formed on the inner peripheral surface of the lock nut. On the other hand, a male screw is formed on the outer peripheral surface of the female lure. Similar to the slip connector, the male luer is inserted into the female luer to bring the tapered surfaces into close contact with each other, and the lock nut is rotated so that the female screw of the lock nut and the male screw of the female luer are screwed together. As a result, the degree of adhesion between the tapered surface of the male luer and the tapered surface of the female luer is higher than that of the slip connector, and the possibility that the male luer and the female luer are unintentionally separated is reduced. The connection method using the screw lock type connector is generally called “screw lock connection”. ISO 594-2 defines the shape of the female screw formed on the lock nut, the allowable range of the relative positional relationship between the tip of the male luer and the female screw, the shape of the male screw formed on the female luer, and the like. .

  On the other hand, in Patent Document 1, as shown in FIGS. 19A and 19B, a disk-shaped partition wall member (hereinafter referred to as “a”) made of an elastic member such as rubber having a linear slit (cut) 811 formed in the central portion. A needleless port 800 with 810 (referred to as a septum) is described. The septum 810 is sandwiched and fixed between the port body 801 and the cap 805. The slit 811 is exposed in the central opening of the cap 805. A flexible tube 809 is connected to the lower end of the port 801. The outer peripheral surface of the needleless port 800 is a cylindrical surface, and a pair of engaging protrusions 807 which are protrusions extending in the circumferential direction are formed on the outer peripheral surface. If a tubular body (not shown) made of a hard material is inserted into the slit 811 of the septum 810, the needleless port 800 and the tubular body can be communicated with each other. When the tubular body is removed from the needleless port 800, the slit 811 of the septum 810 is immediately closed. Thus, the septum 810 has resealability and can repeatedly insert and remove the tubular body.

  Patent Document 1 further describes a rotation lock nut that is rotatably provided around a tubular body that is inserted into the slit 811 of the septum 810. The rotary lock nut is formed with a pair of engaging claws that can engage with the pair of engaging protrusions 807 of the needleless port 800. After the tubular body is inserted into the slit 811 of the septum 810, the rotary lock nut is rotated to engage the pair of engaging claws with the pair of engaging projections 807, thereby strengthening the tubular body and the needleless port 800. It can be securely connected. In the present invention, a connector that rotates the rotation lock nut and engages the pair of engagement protrusions 807 of the needleless port 800 with the pair of engagement claws formed on the rotation lock nut is a “claw lock type” connector in the present invention. The connection method is called “claw lock connection”.

  In the slip type, screw lock type, and claw lock type connectors described above, the male member and the female member are designed to match each other.

  On the other hand, a common male luer can be (1) slip-connected to a female luer compliant with ISO594-1, (2) can be screw-locked to a female luer compliant with ISO594-2, and (3) a needleless port It is desired to be able to connect the claw lock to the door.

  Patent Document 2 enables both a slip connection without using a lock nut and a screw lock connection using a lock nut by enabling the lock nut to move to the base end side of the male luer. A connector has been proposed. However, Patent Document 2 does not describe the claw lock connection of the male luer to the needleless port.

  Patent Document 3 describes a connector that can be connected by the above three connection methods. This will be described below.

  20A is a perspective view of an example of a conventional male luer assembly 910 as viewed from above, and FIG. 20B is a perspective view as viewed from below. 21A is a side view of the male luer assembly 910 shown in FIG. 20A, FIG. 21B is a cross-sectional view taken along the plane including line 21B-21B in FIG. 21A, and FIG. 21C includes line 21C-21C in FIG. It is arrow sectional drawing along the surface. FIG. 22 is a perspective view showing a state in which the lock nut 930 of the male luer assembly 910 shown in FIG. 20A is retracted so as not to overlap the male luer 920.

  The male luer assembly 910 includes a substantially cylindrical male luer 920 in which a through hole 921 is formed, and a lock nut 930 in which the male luer 920 is inserted.

  As shown in FIGS. 20B and 22, a 6% taper surface 922 conforming to ISO594-1 is formed on the outer peripheral surface of the male luer 920, and a flexible tube 929 is formed at the base end 923 thereof. It is connected. An annular protrusion 924 that is continuous in the circumferential direction is formed at the maximum diameter portion of the tapered surface 922. A pair of guide protrusions 926 extending in parallel with the longitudinal direction of the male luer 920 are formed on the outer peripheral surface on the base end 923 side of the annular protrusion 924.

  As shown in FIGS. 21A to 21C, the lock nut 930 includes a substantially cylindrical base portion 931 and a substantially cylindrical lock portion 940 having a larger diameter than the base portion 931.

  A female screw 932 conforming to ISO594-2 is formed on the inner peripheral surface of the base 931. On the upper side of the female screw 932, a position restricting protrusion 933 extending in the circumferential direction is formed. As shown in FIG. 21C, a pair of guide paths 934 are formed at substantially symmetrical positions on the position restricting protrusion 933, and the position restricting protrusion 933 is divided in the circumferential direction by the pair of guide paths 934. Yes.

  A pair of engaging claws 941, which are protrusions extending in the circumferential direction, are formed on the inner peripheral surface of the lock portion 940.

  As shown in FIG. 21B, the male luer 920 is locked to the lock nut 930 so that the position restricting protrusion 933 is positioned between the annular protrusion 924 formed on the outer peripheral surface of the male luer 920 and the pair of guide protrusions 926. Interpolate to At this time, the lock nut 930 can freely rotate around the male luer 920.

  On the other hand, since the annular protrusion 924 and the position restricting protrusion 933 collide, the lock nut 930 is restricted from moving toward the tip (tapered surface 922) side of the male luer 920. Accordingly, the tapered surface 922 of the male luer 920 protrudes from the base 931 of the lock nut 930 by a predetermined length.

  Further, since the pair of guide protrusions 926 and the position restricting protrusions 933 collide, the lock nut 930 is restricted from moving toward the base end 923 with respect to the male luer 920. However, when the lock nut 930 is rotated with respect to the male luer 920 and the positions of the pair of guide protrusions 926 and the pair of guide paths 934 coincide, the pair of guide protrusions 926 pass through the pair of guide paths 934. Can do. Therefore, the lock nut 930 can be moved onto the tube 929 as shown in FIG.

  A method of using the male luer assembly 910 configured as described above will be described.

  As shown in FIG. 22, the slip connection between the male luer assembly 910 and the female luer having a tapered surface in conformity with ISO 594-1 is performed with the tapered surface 922 of the male luer 920 being female with the lock nut 930 retracted. This can be done by inserting it into a lure (not shown).

  A method of screw lock connection between the male luer assembly 910 and a female luer having male threads according to ISO 594-2 will be described.

  FIG. 23 is a schematic perspective view of an example of a female luer 850 conforming to ISO594-2. The female luer 850 has a substantially cylindrical shape, and a through hole 851 (see FIG. 24B described later) is formed at the center. A tapered surface 852 conforming to ISO 594-1 is formed on the inner peripheral surface on the distal end side of the female luer 850, and a male screw 853 conforming to ISO 594-2 is formed on the outer peripheral surface thereof. On the outer peripheral surface between the male screw 853 and the base end 855, a pair of wing-like projections 856 are erected in a partition shape. A flexible tube 859 is connected to the base end 855 of the female luer 850 (see FIGS. 24A and 24B described later).

  24A is a perspective view of a state in which the male luer assembly 910 and the female luer shown in FIG. 23 are screw-locked as seen from above, and FIG. 24B is a cross-sectional view thereof. 24A and 24B, the tapered surface 922 of the male luer 920 is inserted into the tapered surface 852 of the female luer 850, and the female screw 932 of the lock nut 930 and the male screw 853 of the female luer 850 are screwed. Match. Thus, the screw lock connection based on ISO594-2 between the male luer assembly 910 and the female luer 850 can be performed.

  A method of claw lock connection between the male luer assembly 910 and the needleless port 800 shown in FIGS. 19A and 19B will be described.

  FIG. 25A is a perspective view of the male luer assembly 910 and the needleless port 800 as viewed from above in a claw lock connection state, and FIG. 25B is a cross-sectional view thereof. As shown in FIGS. 25A and 25B, the tip of the male luer 920 where the tapered surface 922 is formed is inserted into the slit of the septum 810 of the needleless port 800. The pair of engaging claws 941 of the lock nut 930 are engaged with the pair of engaging protrusions 807 of the needleless port 800. In this way, a claw lock connection between the male luer assembly 910 and the needleless port 800 can be made.

Japanese Patent No. 3389983 JP 7-148271 A Japanese Patent Laying-Open No. 2008-29607 (FIG. 5)

  As described above, the conventional male luer assembly 910 can perform three types of connection: slip connection, screw lock connection, and claw lock connection.

  However, the male luer assembly 910 has the following problems when screw-locked with the female luer 850 as shown in FIGS. 24A and 24B.

  First, the region where the female screw 932 of the lock nut 930 and the male screw 853 of the female luer 850 are screwed together cannot be increased. The reason is as follows. In order to perform the claw lock connection shown in FIGS. 25A and 25B, the tip of the male luer 920 needs to be inserted into the slit of the septum 810 and penetrate the septum 810. For this purpose, it is advantageous that the protruding length from the base 931 of the lock nut 930 at the tip of the male luer 920 is longer. On the other hand, in the screw lock connection shown in FIGS. 24A and 24B, the tapered surface 922 of the male luer 920 and the tapered surface 852 of the female luer 850 are in close contact with each other. There is an upper limit. Therefore, when the protruding length of the male luer 920 from the base 931 of the lock nut 930 is increased so that the male luer 920 can securely penetrate the septum 810 in the claw lock connection, the female screw 932 and the male screw 853 are connected in the screw lock connection. The area that can be screwed is reduced. As a result, there is a problem that the screwing of the female screw 932 and the male screw 853 is easy to loosen.

  Secondly, as can be understood from FIGS. 24A and 24B, the lock portion 940 of the lock nut 930 that does not function when the screw lock is connected projects locally in the radial direction. Therefore, for example, when the male luer assembly 910 that is screw-locked is fixed to the patient's arm or the like with an adhesive tape, the protruding lock portion 940 may hit the patient's skin and cause discomfort to the patient. .

  The present invention solves the above-mentioned problems, and can be connected in three ways: slip connection, screw lock connection, and claw lock connection. And it aims at providing the medical connector in which the local protrusion of radial direction was suppressed.

  The medical connector according to the present invention includes a male luer having a through-hole formed in a longitudinal direction, a male luer assembly including a lock nut rotatably provided around the male luer, and the male luer assembly. A medical connector that includes a removable adapter and is connectable to a needleless port that includes an elastic partition member (septum) having a slit. A tapered surface is formed on the outer peripheral surface of the tip of the male luer. A female screw is formed on the inner peripheral surface of the lock nut. The lock nut is movable relative to the male luer in the longitudinal direction of the male luer. The male luer assembly includes a movement restricting mechanism that restricts a range in which the lock nut can move with respect to the male luer toward the tip side of the male luer. The adapter is attached to the male luer assembly from the distal end side of the male luer. The adapter includes a cylindrical portion into which the tip of the male luer is inserted, an insertion portion that communicates with the cylindrical portion and can be inserted into the slit of the elastic partition wall member, and an outer peripheral surface of the needleless port. An engagement claw that can be engaged with the formed engagement protrusion, a grip portion that covers at least a part of the outer peripheral surface of the lock nut, and an engagement structure that engages with the lock nut.

  The medical connector of the present invention can be slip-connected without using an adapter and with the lock nut retracted, and without using the adapter, and can be screw-locked using the lock nut. And can use an adapter to make a claw lock connection.

  In addition, it is possible to secure a sufficient area where the female screw of the lock nut and the male screw of the female luer are screwed together when the screw lock is connected, thereby reducing the possibility of loosening of the screwing of the female screw and the male screw. Can do.

  Furthermore, since an adapter is not used at the time of screw lock connection, there is no local protrusion in the radial direction and the diameter is small. Therefore, the possibility of making the patient feel uncomfortable is reduced.

1A is a perspective view of the connector according to Embodiment 1 of the present invention as viewed from above, and FIG. 1B is a perspective view of the connector as viewed from below. FIG. 2 is a cross-sectional view of the connector according to Embodiment 1 of the present invention. 3A is an exploded perspective view of the connector according to Embodiment 1 of the present invention as viewed from above, and FIG. 3B is an exploded perspective view of the connector as viewed from below. FIG. 4 is an exploded cross-sectional view of the connector according to Embodiment 1 of the present invention. FIG. 5 is a perspective view showing a male luer constituting the connector according to Embodiment 1 of the present invention. 6A is a perspective view seen from above the lock nut constituting the connector according to Embodiment 1 of the present invention, FIG. 6B is a perspective view seen from below, FIG. 6C is a plan view thereof, and FIG. 6D is a sectional view thereof. is there. FIG. 7 is a perspective view showing a state in which the lock nut of the male luer assembly constituting the connector according to Embodiment 1 of the present invention is retracted so as not to overlap the male luer. 8A is a side view showing a state in which a male luer assembly and a female luer constituting the connector according to Embodiment 1 of the present invention are screw-locked, and FIG. 8B is a cross-sectional view thereof. FIG. 9A is a perspective view of the connector according to Embodiment 1 of the present invention and the needleless port as viewed from above in a claw lock connection state, and FIG. 9B is a sectional view thereof. FIG. 10 is a cross-sectional view of a connector according to Embodiment 2 of the present invention. 11A is an exploded perspective view of the connector according to Embodiment 2 of the present invention as viewed from above, and FIG. 11B is an exploded cross-sectional view thereof. FIG. 12 is a side view of a lock nut constituting the connector according to Embodiment 2 of the present invention. 13A is a perspective view of the connector according to Embodiment 3 of the present invention as viewed from above, and FIG. 13B is a perspective view of the connector as viewed from below. FIG. 14 is a cross-sectional view of a connector according to Embodiment 3 of the present invention. 15A is an exploded perspective view of the connector according to Embodiment 3 of the present invention as viewed from above, and FIG. 15B is an exploded perspective view of the connector as viewed from below. FIG. 16 is an exploded cross-sectional view of a connector according to Embodiment 3 of the present invention. FIG. 17A is a perspective view of the connector according to Embodiment 3 of the present invention and a needleless port as viewed from above in a claw lock connection state, and FIG. 17B is a cross-sectional view thereof. FIG. 18 is a perspective view of another adapter constituting the connector according to Embodiment 3 of the present invention as viewed from above. FIG. 19A is a perspective view showing a schematic configuration of an example of a needleless port, and FIG. 19B is a sectional view thereof. FIG. 20A is a perspective view of an example of a conventional male luer assembly as seen from above, and FIG. 20B is a perspective view as seen from below. 21A is a side view of the male luer assembly shown in FIG. 20A, FIG. 21B is a cross-sectional view taken along the plane including line 21B-21B in FIG. 21A, and FIG. 21C is a plane including line 21C-21C in FIG. FIG. FIG. 22 is a perspective view showing the male luer assembly shown in FIG. 20A in a state where the lock nut is retracted so as not to overlap the male luer. FIG. 23 is a schematic perspective view of an example of a female luer conforming to ISO594-2. FIG. 24A is a perspective view of the male luer assembly shown in FIGS. 20A and 20B and the female luer shown in FIG. 23 as viewed from above, and FIG. 24B is a sectional view thereof. FIG. 25A is a perspective view of the male luer assembly shown in FIGS. 20A and 20B and the needleless port shown in FIGS. 19A and 19B in a claw-lock connection state, as viewed from above, and FIG. 25B is a sectional view thereof. .

  The medical connector of the present invention includes an adapter that can be attached to and detached from the male luer assembly.

  The adapter includes a grip portion that covers at least a part of the outer peripheral surface of the lock nut. Therefore, when the nail lock connection is made to the needleless port of the medical connector of the present invention in which the adapter is attached to the male luer assembly, or when the separation is performed, the outer peripheral surface of the adapter is held. Can do.

  The adapter includes an engagement structure that engages with the lock nut. Thereby, when the adapter is mounted on the male luer assembly, the possibility that the adapter and the male luer assembly are unintentionally separated can be reduced.

  It is preferable that the engagement structure includes a male screw formed on the outer peripheral surface of the cylindrical portion and screwed into the female screw formed on the inner peripheral surface of the lock nut. Thus, the adapter can be firmly attached to the male luer assembly by using the female screw provided on the lock nut for screw lock connection. In the above, it is preferable that the male screw conforms to ISO594-2.

  Alternatively, the engagement structure may include a member that engages with an outer peripheral surface of the lock nut. Thereby, engagement structures other than a screw can be adopted, and the degree of freedom in designing the engagement structure is improved.

  The engagement structure may include a member constituting a snap fit. Thereby, the operator can easily recognize that the adapter is engaged with the lock nut (or male luer assembly).

  It is preferable that the grip portion includes an annular body that is continuous in the circumferential direction. Thereby, the strength of the adapter is improved. Further, in a state where the adapter is mounted on the male luer assembly, the possibility that the operator accidentally touches the lock nut and the adapter and the male luer assembly are unintentionally separated is reduced.

  The grip portion may include a pair of grip arms that can swing elastically. In this case, it is preferable that the engagement structure that engages with the lock nut is provided at one end of each of the pair of grip arms. Moreover, it is preferable that the engaging claws that can engage with the engaging protrusions formed on the outer peripheral surface of the needleless port are formed at the other ends of the pair of grip arms. Even in this configuration, the operator can easily recognize that the adapter is engaged with the lock nut (or the male luer assembly).

  In the above, when the engagement structure is engaged with the lock nut and the engagement claw is engaged with an engagement protrusion formed on an outer peripheral surface of the needleless port, the pair of grip arms are rocked. It is preferable that movement is restricted. Thereby, since the engagement between the adapter and the lock nut (or male luer assembly) cannot be released when the claw lock is connected, the possibility that the operator performs an erroneous operation is reduced, and the safety is improved.

  In the above, it is preferable that a male screw threadedly engaged with the female screw formed on the inner peripheral surface of the lock nut is formed on the outer peripheral surface of the cylindrical portion. As a result, the possibility that the adapter and the lock nut (or male luer assembly) are unintentionally separated due to the application of an external force or the like can be reduced. In addition, since the operator can easily recognize that the engagement structure is engaged with the lock nut, the female screw and the male screw can always be screwed together with an appropriate tightening torque regardless of the operator. it can.

  It is preferable that the taper surface formed on the outer peripheral surface at the tip of the male luer conforms to ISO594-1. Thereby, the slip connection based on ISO594-1 and the female luer in which the taper surface based on ISO594-1 was formed can be performed.

  It is preferable that the inner peripheral surface of the cylindrical portion of the adapter is formed with a tapered surface that matches the tapered surface formed on the outer peripheral surface of the distal end of the male luer. As a result, when the adapter is mounted on the male luer assembly, a liquid-tight seal is formed between the male luer and the cylindrical portion of the adapter, thereby preventing liquid leakage.

  It is preferable that the female screw formed on the inner peripheral surface of the lock nut conforms to ISO594-2. Thereby, the screw lock connection based on ISO594-2 and the female luer in which the male thread based on ISO594-2 was formed can be performed.

  When the adapter is attached to the male luer assembly, a part of the outer peripheral surface of the lock nut is preferably exposed in the radial direction. Thereby, the operation | work which attaches / detaches an adapter with respect to the said male luer assembly can be performed easily.

  Below, this invention is demonstrated in detail, showing suitable embodiment. However, it goes without saying that the present invention is not limited to the following embodiments. For convenience of explanation, the drawings referred to in the following description show only the main members necessary for explaining the present invention in a simplified manner among the constituent members of the embodiment of the present invention. Therefore, the present invention can include any member not shown in the following drawings. In addition, the dimensions in the following drawings do not faithfully represent actual dimensions, dimension ratios, and the like.

(Embodiment 1)
1A is a perspective view of a medical connector (hereinafter simply referred to as “connector”) 1 according to Embodiment 1 of the present invention as viewed from above, FIG. 1B is a perspective view of the medical connector as viewed from below, and FIG. is there. The connector 1 according to the first embodiment includes a male luer assembly 11 including a male luer 20 and a lock nut 30, and an adapter 50. 3A is an exploded perspective view seen from above the connector 1 disassembled into the male luer assembly 11 and the adapter 50, FIG. 3B is an exploded perspective view seen from below, and FIG. 4 is an exploded sectional view thereof. For convenience of the following description, the upper side of the paper surface of FIG. 2 is referred to as the “upper side” of the connector 1, and the lower side of the paper surface of FIG. Note that this vertical direction of the connector 1 does not mean a posture in a situation where the connector 1 is actually used.

  FIG. 5 is a perspective view showing the male luer 20. The male luer 20 has a substantially cylindrical shape as a whole in which a through hole 21 is formed along the longitudinal direction thereof. A 6% tapered surface 22 conforming to ISO594-1 is formed on the outer peripheral surface of one end (ie, the tip) of the male luer 20, and a flexible tube 29 is connected to the other end (ie, the base end 23). (See FIGS. 3A, 3B, and 4). An annular protrusion 24 that is continuous in the circumferential direction is formed at the maximum diameter portion of the tapered surface 22. The outer peripheral surface of the portion closer to the base end 23 than the annular protrusion 24 is a cylindrical surface having a constant outer diameter, and a pair of guide protrusions 26 extending in parallel in the longitudinal direction are formed on the cylindrical surface at symmetrical positions. Yes. The male luer 20 may be the same as the male luer 920 constituting the conventional male luer assembly 910 shown in FIGS. 20A and 20B.

  6A is a perspective view seen from above the lock nut 30, FIG. 6B is a perspective view seen from below, FIG. 6C is a plan view thereof, and FIG. 6D is a sectional view thereof. The lock nut 30 has a substantially cylindrical shape as a whole. On the inner peripheral surface of the lock nut 30, a female screw 32 conforming to ISO 594-2 is formed from the lower end to the substantially central portion. A position restricting projection 33 extending in the circumferential direction is formed above the female screw 32. A pair of guide paths 34 are formed at substantially symmetrical positions on the position restricting protrusions 33, and the position restricting protrusions 33 are divided in the circumferential direction by the pair of guide paths 34. The upper part of the outer peripheral surface of the lock nut 30 is a cylindrical surface 36, and the lower part is a regular hexagonal cylinder surface 37 for easy gripping and application of rotational torque. The regular hexagonal column surface 37 has a larger outer diameter than the cylindrical surface 36, and as a result, a shoulder portion 38, which is a portion where the outer diameter changes, is formed at the boundary between the cylindrical surface 36 and the regular hexagonal column surface 37. In addition, the shape of the outer peripheral surface of the lock nut 30 is not limited to the above configuration.

  The base end 23 of the male luer 20 is inserted into the opening of the lock nut 30 on the side where the female screw 32 is formed. When the lock nut 30 is rotated around the male luer 20, the pair of guide protrusions 26 formed on the outer peripheral surface of the male luer 20 and the pair of guide paths 34 on the inner peripheral surface of the lock nut 30 are matched. The guide protrusions 26 can pass through a pair of guide paths 34. Therefore, as shown in FIG. 4, the male luer 20 is positioned so that the position restricting protrusion 33 of the lock nut 30 is positioned between the annular protrusion 24 formed on the outer peripheral surface of the male luer 20 and the pair of guide protrusions 26. The luer 20 can be inserted into the lock nut 30. At this time, the lock nut 30 can freely rotate around the male luer 20.

  On the other hand, since the annular protrusion 24 and the position restricting protrusion 33 collide, the lock nut 30 is restricted from moving toward the tip (tapered surface 22) side with respect to the male luer 20. Therefore, the annular protrusion 24 and the position restricting protrusion 33 constitute a movement restriction mechanism that restricts the range in which the lock nut 30 can move relative to the male luer 20 toward the distal end side of the male luer 20. In a state where the annular protrusion 24 and the position restricting protrusion 33 collide, the relative positional relationship between the distal end of the male luer 20 and the female screw 32 including the protruding length of the distal end of the male luer 20 from the lock nut 30 is ISO594- 2 compliant.

  Further, since the pair of guide protrusions 26 and the position restricting protrusions 33 collide with each other, the lock nut 30 is restricted from moving toward the base end 23 with respect to the male luer 20. However, when the lock nut 30 is rotated with respect to the male luer 20 and the positions of the pair of guide protrusions 26 and the pair of guide paths 34 coincide, the pair of guide protrusions 26 pass through the pair of guide paths 34. Can do. Accordingly, the lock nut 30 can be moved onto the chew 929 as shown in FIG.

  As shown in FIGS. 3A, 3B, and 4, the adapter 50 includes a cylindrical portion 51 and an insertion portion 56, both of which have a substantially cylindrical shape. A tapered surface 52 conforming to ISO 594-1 is formed on the inner peripheral surface of the tubular portion 51, and a male screw 53 conforming to ISO 594-2 is formed on the outer peripheral surface of the tubular portion 51. The insertion portion 56 is provided coaxially with the tubular portion 51 and communicates with the tubular portion 51.

  A substantially disc-shaped bottom plate 55 is provided projecting outward at the boundary where the cylindrical portion 51 and the insertion portion 56 are connected. A grip portion 60 is provided on the outer peripheral edge of the bottom plate 55.

  The grip portion 60 includes an outer cylinder portion 61 disposed on the same side as the cylindrical portion 51 with respect to the bottom plate 55 and a pair of lock pieces 65 disposed on the same side as the insertion portion 56 with respect to the bottom plate 55. .

  The outer cylinder part 61 has a substantially cylindrical shape as a whole, and the inner peripheral surface 62 is a cylindrical surface coaxial with the cylindrical part 51 so that the adapter 50 can be easily grasped with two fingers on the outer peripheral surface. A pair of gripping surfaces 63 is formed on the surface. Since the outer cylinder part 61 is an annular body that is continuous in the circumferential direction, the adapter 50 has a high mechanical strength.

  The surfaces (inner peripheral surfaces) facing the insertion portion 56 of the pair of lock pieces 65 constitute a cylindrical surface coaxial with the insertion portion 56. An engagement claw 67 extending in the circumferential direction and a stopper portion 68 extending from one end in the circumferential direction of the engagement claw 67 to the bottom plate 55 are formed on the inner peripheral surface of each lock piece 65. Both the locking claw 67 and the stopper portion 68 protrude toward the insertion portion 56 on the inner peripheral surface of the lock piece 65. The pair of lock pieces 65 may be continuous in the circumferential direction similarly to the lock portion 940 shown in FIGS. 21A to 21C, and the locking claw 67 and the stopper portion 68 may be formed on the inner peripheral surface thereof.

  The adapter 50 is detachable from the male luer assembly 11.

  A method for attaching the adapter 50 to the male luer assembly 11 will be described.

  As shown in FIG. 4, the lock nut 30 is disposed on the male luer 20 so that the position restricting projection 33 of the lock nut 30 is positioned between the annular protrusion 24 of the male luer 20 and the pair of guide protrusions 26. At this time, the lock nut 30 can rotate around the male luer 20 as described above, but the movement of the male luer 20 along the longitudinal direction is limited. The male luer assembly 11 and the adapter 50 in this state are fitted together in the directions shown in FIGS. 3A, 3B, and 4. The lock nut 30 is inserted into the outer cylindrical portion 61 of the adapter 50, and the tapered surface 22 of the male luer 20 is inserted into the cylindrical portion 51 of the adapter 50. Next, when the adapter 50 is rotated with respect to the lock nut 30, the male screw 53 formed on the outer peripheral surface of the cylindrical portion 51 of the adapter 50 and the female screw 32 formed on the inner peripheral surface of the lock nut 30 are screwed. Start to join. Accordingly, the lock nut 30 further enters the outer cylinder portion 61 of the adapter 50. Since the position restricting protrusion 33 of the lock nut 30 and the annular protrusion 24 of the male luer 20 are engaged, the male luer 20 moves together with the lock nut 30, and the tapered surface 22 of the male luer 20 is also a cylindrical portion of the adapter 50. Enter 51 further. When the tapered surface 22 of the male luer 20 is in close contact with the tapered surface 52 formed on the inner peripheral surface of the tubular portion 51 of the adapter 50, the male luer 20 cannot enter deeper into the tubular portion 51. . Therefore, the male screw 53 of the adapter 50 and the female screw 32 of the lock nut 30 cannot be screwed deeper than this. Thus, the adapter 50 can be attached to the male luer assembly 11 as shown in FIGS. 1A, 1B and 2.

  When the adapter 50 is attached to the male luer assembly 11, since the male screw 53 and the female screw 32 are screwed together, the adapter 50 and the male luer assembly 11 are not intended by applying an external force or the like. It is possible to reduce the possibility of separation. Moreover, since the outer cylinder part 61 of the adapter 50 surrounds the periphery of the lock nut 30, the operator may accidentally touch the lock nut 30 and unintentionally separate the adapter 50 and the male luer assembly 11. Can be reduced.

  The male luer assembly 11 and the adapter 50 may be separated from each other by the reverse operation. That is, when the adapter 50 is attached to the male luer assembly 11 as shown in FIGS. 1A, 1B, and 2, the adapter 50 is rotated with respect to the lock nut 30 in the opposite direction to the above, The screwing between the male screw 53 and the female screw 32 of the lock nut 30 may be released.

  Even when the adapter 50 is mounted on the male luer assembly 11, a part of the lock nut 30 (for example, the cylindrical surface 36) is exposed in the radial direction without being covered by the adapter 50. Therefore, the adapter 50 can be rotated with respect to the lock nut 30 by holding the lock nut 30 with one hand and the adapter 50 with the other hand.

  As described above, in this embodiment, the adapter 50 is fitted to the male luer assembly 11 in the directions shown in FIGS. 3A, 3B, and 4, and the adapter 50 is simply rotated with respect to the lock nut 30. 50 can be easily attached to the male luer assembly 11. If the adapter 50 is further rotated with respect to the lock nut 30 until it cannot be rotated, the tapered surface 22 of the male luer 20 and the tapered surface 52 of the adapter 50 are brought into close contact with each other. Since the taper surfaces 22 and 52 conform to ISO594-1, a liquid-tight seal is formed, and the male luer 20, the tubular portion 51, and the insertion portion 56 can communicate with each other. The male luer assembly 11 and the adapter 50 can be easily separated simply by rotating the adapter 50 with respect to the lock nut 30 in the opposite direction.

  A method of slip-connecting, screw-locking connection, and claw-locking connection of the connector 1 of the present embodiment configured as described above will be described below.

  A slip connection with a female luer (not shown) having a tapered surface in conformity with ISO594-1 will be described. Without attaching the adapter 50, the lock nut 30 is moved onto the tube 29 as shown in FIG. In this state, the tapered surface 22 at the tip of the male luer 20 may be inserted into the female luer. Since the taper surface 22 conforms to ISO594-1, a liquid-tight seal can be formed with the taper surface of the female luer.

  A screw lock connection with the female luer 850 shown in FIG. 23 having a male screw conforming to ISO594-2 will be described. Also in this case, without attaching the adapter 50, as shown in FIGS. 3A, 3B, and 4, the position restricting protrusion 33 of the lock nut 30 is located between the annular protrusion 24 of the male luer 20 and the pair of guide protrusions 26. The lock nut 30 is placed on the male luer 20 so that it is positioned. In this state, the tapered surface 22 of the male luer 20 is inserted into the tapered surface 852 of the female luer 850, and the female screw 32 of the lock nut 30 and the male screw 853 of the female luer 850 are screwed together. FIG. 8A is a side view showing a state in which the male luer assembly 11 and the female luer 850 are screw-locked, and FIG. 8B is a cross-sectional view thereof. Since the female screw 32 of the lock nut 30 complies with ISO594-2, it can be screwed with the male screw 853 of the female luer 850 conforming to ISO594-2. Since the position restricting protrusion 33 of the lock nut 30 and the annular protrusion 24 of the male luer 20 are engaged, the male luer 20 moves together with the lock nut 30. If the lock nut 30 is rotated with respect to the female luer 850 until it cannot be further rotated, the tapered surface 22 of the male luer 20 and the tapered surface 852 of the female luer 850 are brought into close contact with each other. Since the taper surfaces 22 and 852 conform to ISO594-1, a liquid-tight seal is formed. To release the screw lock connection, the lock nut 30 may be rotated in the opposite direction to the female luer 850.

  A claw lock connection with the needleless port 800 shown in FIGS. 19A and 19B will be described. In this case, the adapter 50 is attached to the male luer assembly 11 as shown in FIG. 1A, FIG. 1B, and FIG. Then, the insertion portion 56 of the adapter 50 is inserted into the slit 811 of the septum 810 of the needleless port 800. The adapter 50 is pressed against the needleless port 800 so that the bottom plate 55 of the adapter 50 contacts the upper surface of the needleless port 800. In this state, the adapter 50 is rotated with respect to the needleless port 800. Thereby, the engagement claw 67 formed on the inner peripheral surface of the lock piece 65 of the adapter 50 and the engagement protrusion 807 of the needleless port 800 can be engaged. If the adapter 50 is rotated with respect to the needleless port 800 until one end of the engaging projection 807 comes into contact with the stopper portion 68 adjacent to one end of the engaging claw 67, the engaging claw 67 and the engaging projection 807 are sufficient. Can be engaged deeply. FIG. 9A is a perspective view of the connector 1 and the needleless port 800 in a claw lock connection state as viewed from above, and FIG. 9B is a cross-sectional view thereof. To release the claw lock connection, the adapter 50 is rotated with respect to the needleless port 800 in the reverse direction to release the engagement between the engaging claw 67 and the engaging projection 807, and then the adapter 50 is moved to the needleless port 800. Just pull out from.

  As described above, the connector 1 of this embodiment includes the male luer assembly 11 and the adapter 50 that can be attached to and detached from the male luer assembly 11. The male luer assembly 11 includes a male luer 20 and a lock nut 30 movable in the longitudinal direction of the male luer 20. Therefore, the slip connection can be performed without using the adapter 50 and without using the lock nut 30 (that is, with the lock nut 30 retracted), and the screw lock connection can be performed without using the adapter 50. In addition, the lock nut 30 can be used, and the claw lock connection can be made using the adapter 50.

  When the claw lock is connected (FIGS. 9A and 9B), not the male luer 20 but the insertion portion 56 of the adapter 50 is inserted into the slit 811 of the septum 810. Therefore, the protruding length of the male luer 20 from the lock nut 30 (more precisely, the distance from the tip of the male luer 20 to the female screw 32) needs to consider the relationship with the septum 810 when the claw lock is connected. Unlike the conventional male luer assembly 910 shown in FIG. 20A, FIG. 20B, and FIG. 21, from the viewpoint of realizing a desirable screw lock connection (FIGS. 8A and 8B) within the range allowed by ISO594-2. Can be designed. As a result, it is possible to sufficiently secure a region where the female screw 32 of the lock nut 30 and the male screw 853 of the female luer 850 are screwed together when the screw lock is connected, so that the screwing of the female screw 32 and the male screw 853 is possible. The possibility of loosening can be reduced.

  In addition, when the screw lock is connected, the adapter 50 is not used as shown in FIGS. 8A and 8B. Therefore, as can be understood by comparing with FIGS. It is. Therefore, the possibility of making the patient feel uncomfortable is reduced.

(Embodiment 2)
In the first embodiment, the connection between the lock nut 30 and the adapter 50 uses screw threading. That is, a female screw 32 conforming to ISO594-2 formed on the inner peripheral surface of the lock nut 30 and a male screw 53 conforming to ISO594-2 formed on the outer peripheral surface of the cylindrical portion 51 of the adapter 50 are screwed. Combined.

  In contrast, in the second embodiment, the lock nut and the adapter are snap-fit connected. Hereinafter, the present embodiment will be described with a focus on differences from the first embodiment.

  FIG. 10 is a cross-sectional view of the connector 2 according to the second embodiment. Similar to the connector 1 of the first embodiment, the connector 2 of this embodiment includes a male luer assembly 12 including a male luer 20 and a lock nut 40, and an adapter 70. 11A is an exploded perspective view as seen from above the connector 2 disassembled into the male luer assembly 12 and the adapter 70, and FIG. 11B is an exploded sectional view thereof. FIG. 12 is a side view of the lock nut 40. In these drawings, the same members and parts as those constituting the connector 1 of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof is omitted.

  As shown in FIGS. 11A, 11B, and 12, the lock nut 40 is different from the lock nut 30 of the first embodiment in that a continuous protrusion 41 that is continuous in the circumferential direction is formed on the outer peripheral surface thereof. Different. In FIG. 12, the continuous protrusion 41 is formed at the lower end of the lock nut 40, but the vertical position thereof is not limited to this.

  The adapter 70 is different from the adapter 50 of the first embodiment in the following points. First, as shown in FIG. 11B, a pair of locking protrusions 71 are formed at symmetrical positions on the inner peripheral surface of the outer cylinder portion 61 of the adapter 70. Secondly, the external thread 53 provided in the adapter 50 of the first embodiment is not formed on the outer peripheral surface of the cylindrical portion 51.

  Similar to the male luer assembly 10 of the first embodiment, the male luer assembly 12 of the present embodiment is assembled by inserting the male luer 20 into the lock nut 40.

  Similarly to the first embodiment, in this embodiment, the adapter 70 can be attached to and detached from the male luer assembly 12.

  A method for attaching the adapter 70 to the male luer assembly 12 will be described.

  As shown in FIG. 11B, the lock nut 40 is disposed on the male luer 20 so that the position restricting projection 33 of the lock nut 40 is positioned between the annular projection 24 of the male luer 20 and the pair of guide projections 26. The male luer assembly 12 and the adapter 70 in this state are fitted in the directions shown in FIGS. 11A and 11B. The lock nut 40 is inserted into the outer cylindrical portion 61 of the adapter 70, and the tapered surface 22 of the male luer 20 is inserted into the cylindrical portion 51 of the adapter 70. When the lock nut 40 is inserted deeply into the outer cylindrical portion 61 of the adapter 70, the continuous protrusion 41 formed on the outer peripheral surface of the lock nut 40 and a pair formed on the inner peripheral surface of the outer cylindrical portion 61 of the adapter 70. And the locking projection 71 collide with each other. At this time, when the lock nut 40 is pushed into the adapter 70 by applying a force, the pair of locking protrusions 71 of the adapter 70 get over the continuous protrusion 41 of the lock nut 40, and the continuous protrusion 41 and the locking protrusion 71 are connected. Engage. Since the position restricting protrusion 33 of the lock nut 40 and the annular protrusion 24 of the male luer 20 are engaged, the male luer 20 moves together with the lock nut 40 and the continuous protrusion 41 and the locking protrusion 71 are engaged. At the same time, the tapered surface 22 of the male luer 20 and the tapered surface 52 formed on the inner peripheral surface of the cylindrical portion 51 of the adapter 70 are in close contact with each other. Thus, the adapter 70 can be attached to the male luer assembly 12 as shown in FIG.

  The male luer assembly 12 and the adapter 70 may be separated from each other by the reverse operation. That is, when a force is applied to separate the lock nut 40 and the adapter 70 in a state where the adapter 70 is mounted on the male luer assembly 12 as shown in FIG. The engagement of the continuous protrusion 41 and the locking protrusion 71 is released.

  As described above, in this embodiment, the adapter 70 can be easily attached to the male luer assembly 12 simply by pushing the lock nut 40 into the adapter 70 until the continuous protrusion 41 and the locking protrusion 71 are engaged. Can do. The operator can easily recognize that the continuous protrusion 41 and the locking protrusion 71 are engaged with each other by tactile sensation, preferably with a “click” sound. At the same time as the continuous protrusion 41 and the locking protrusion 71 are engaged, the tapered surface 22 and the tapered surface 52 conforming to ISO594-1 are brought into close contact with each other, and a liquid-tight seal is formed.

  In the first embodiment, by rotating the adapter 50 with respect to the lock nut 30, the male screw 53 of the adapter 50 and the female screw 32 of the lock nut 30 are screwed together, and the tapered surface 22 and the tapered surface 52 are brought into close contact with each other. It was. In this configuration, it is difficult for the operator to determine how much torque the adapter 50 needs to be fastened to the lock nut 30 in order for the tapered surface 22 and the tapered surface 52 to form a liquid-tight seal. If the tightening force is too strong, it may be difficult to separate the lock nut 30 and the adapter 50. On the other hand, if the tightening force is too weak, the screws 32 and 53 are likely to loosen and liquid leakage may occur from between the tapered surface 22 and the tapered surface 52.

  On the other hand, in this embodiment, since the operator can easily recognize that the continuous protrusion 41 and the locking protrusion 71 are engaged, the tapered surface 22 and the tapered surface 52 are independent of the operator. Can always be properly adhered.

  Similarly to the connector 1 of the first embodiment, the connector 2 of the present embodiment can perform three types of connection: slip connection, screw lock connection, and claw lock connection.

  Similarly to the first embodiment, when the screw lock is connected, it is possible to secure a sufficient area where the female screw 32 of the lock nut 40 and the male screw 853 of the female luer 850 are screwed together. The possibility that the screwing with 853 is loosened can be reduced.

  Furthermore, since the adapter 70 is not used at the time of screw lock connection, there is no local protrusion in the radial direction and the diameter is small. Therefore, the possibility of making the patient feel uncomfortable is reduced.

  In the specific example of the second embodiment, the male screw 53 is not formed on the outer peripheral surface of the cylindrical portion 51. However, the present invention is not limited to this, and the male screw 53 provided in the adapter 50 of the first embodiment may be formed on the outer peripheral surface of the cylindrical portion 51 of the adapter 70. When the adapter 70 is attached to the male luer assembly 12, the male screw 53 is screwed with the female screw 32 of the lock nut 40 as in the first embodiment. Accordingly, it is possible to reduce the possibility that the adapter 70 and the male luer assembly 12 are unintentionally separated due to external force or the like.

  When the male screw 53 is formed on the outer peripheral surface of the cylindrical portion 51, when the adapter 70 is attached to and detached from the male luer assembly 12, the adapter 70 is attached to the male luer assembly 12 as in the first embodiment. Need to be rotated. When the locking protrusion 71 of the adapter 70 collides with the continuous protrusion 41 of the lock nut 40 and subsequently the locking protrusion 71 gets over the continuous protrusion 41, the rotational torque changes. The operator can recognize this as a click feeling. Accordingly, when the adapter 70 is attached to the male luer assembly 12, the taper surface 22 and the taper surface 22 can be tapered regardless of the operator if the adapter 70 is rotated with respect to the male luer assembly 12 until this click feeling is felt. The surface 52 can always be properly adhered.

  Further, once the adapter 70 is attached to the male luer assembly 12, the locking protrusion 71 and the continuous protrusion 41 are engaged. Therefore, even if vibration or the like is applied, the screwing of the male screw 53 and the female screw 32 is difficult to loosen.

  In the above specific example of the second embodiment, the continuous protrusion 41 of the lock nut 40 and the locking protrusion 71 of the adapter 70 are engaged, but the engagement structure provided on each of the lock nut 40 and the adapter 70 is a snap. It is only necessary that a fit can be configured, and the present invention is not limited to the above embodiment. For example, the number of the locking protrusions 71 is not limited to two, and may be more or less than this. A continuous protrusion may be formed on the inner peripheral surface 62 of the outer cylindrical portion 61 of the adapter 70, and one or more protrusions that can be engaged with the continuous protrusion may be formed on the outer peripheral surface of the lock nut 40. Instead of engaging the protrusion with the protrusion, a protrusion may be formed on one of the lock nut 40 and the adapter 70 and a recess into which the protrusion is fitted may be formed on the other. As for the engagement structure provided in each of the lock nut 40 and the adapter 70, either one is continuous in the circumferential direction as in the above embodiment, and the other is not necessarily separated in the circumferential direction. They may be continuous or both may be discrete in the circumferential direction.

(Embodiment 3)
The grip portions 60 of the adapters 50 and 70 of the first and second embodiments have an annular outer cylinder portion 61 that surrounds the periphery of the lock nut 40. On the other hand, the adapter of the third embodiment includes a pair of grip arms that can be elastically swung as a grip portion. Hereinafter, the present embodiment will be described with a focus on differences from the first embodiment.

  13A is a perspective view seen from above the connector 3 according to the third embodiment, FIG. 13B is a perspective view seen from below, and FIG. 14 is a sectional view thereof. Similar to the connector 1 of the first embodiment, the connector 3 of this embodiment includes a male luer assembly 11 including a male luer 20 and a lock nut 30, and an adapter 80. 15A is an exploded perspective view seen from above the connector 3 disassembled into the male luer assembly 11 and the adapter 80, FIG. 15B is an exploded perspective view seen from below, and FIG. 16 is an exploded sectional view thereof. In these drawings, the same members and parts as those constituting the connector 1 of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof is omitted.

  As shown in FIGS. 15A, 15B, and 16, the adapter 80 includes a pair of grip arms 81 at opposite edges of the bottom plate 55. The grip arm 81 extends in the vertical direction with respect to the bottom plate 55.

  A portion (engagement piece 82) on the upper side (tubular portion 51 side) with respect to the bottom plate 55 of the grip arm 81 is curved so as to approach each other, and an engagement end 83 is formed at the tip thereof. The engaging end 83 is an arc having a radius substantially the same as the cylindrical surface 36 (see FIG. 6A) of the lock nut 30 with the point on the central axis of the cylindrical portion 51 as the center. Also, as shown in FIG. 16, the surface of each engagement end 83 is inclined so as to approach the bottom plate 55 as it approaches the other party.

  The surface (inner peripheral surface) facing the insertion portion 56 of the lower portion (the insertion portion 56 side) of the grip arm 81 (on the insertion portion 56 side) (the lock piece 85) constitutes a cylindrical surface coaxial with the insertion portion 56. . On the inner peripheral surface of the lock piece 85, similarly to the lock piece 65 of the first embodiment, an engagement claw 67 extending in the circumferential direction and a stopper portion 68 extending from one end in the circumferential direction of the engagement claw 67 to the bottom plate 55. And are formed.

  The grip arm 81 including the engagement piece 82 and the lock piece 85 can be regarded as a substantially rigid body. On the other hand, the bottom plate 55 holding the grip arm 81 can be bent elastically. Therefore, when the bottom plate 55 is curved, the pair of grip arms 81 are elastically swung. That is, when the engagement pieces 82 are displaced so as to approach each other, the lock pieces 85 are displaced so as to be separated from each other, and conversely, when the engagement pieces 82 are displaced so as to be separated from each other, the lock pieces 85 are approached. Displace.

  The external thread 53 provided in the adapter 50 of the first embodiment is not formed on the outer peripheral surface of the cylindrical portion 51 of the adapter 80.

  Except for the above, the adapter 80 of the present embodiment is the same as the adapter 50 of the first embodiment.

  The male luer assembly 11 of this embodiment is the same as that of the first embodiment.

  Similarly to the first embodiment, in this embodiment, the adapter 80 can be attached to and detached from the male luer assembly 11.

  A method for attaching the adapter 80 to the male luer assembly 11 will be described.

  As shown in FIG. 16, the lock nut 30 is disposed on the male luer 20 so that the position restricting projection 33 of the lock nut 30 is positioned between the annular protrusion 24 of the male luer 20 and the pair of guide protrusions 26. The male luer assembly 11 and the adapter 80 in this state are opposed to each other as shown in FIGS. 15A, 15B, and 16. The engagement end 83 at the upper end of the pair of grip arms 81 contacts the lower end of the regular hexagonal column surface 37 on the outer peripheral surface of the lock nut 30. The engaging end 83 has an inclined surface as described above. Therefore, when the male luer assembly 11 is further pushed into the adapter 80 in a state where the lower end of the regular hexagonal column surface 37 is in contact with the inclined surface of the engagement end 83, a pair of engagement ends 83 is expanded. The grip arm 81 is displaced. As a result, the regular hexagonal prism surface 37 of the lock nut 30 is inserted between the pair of engagement ends 83. Alternatively, the pair of lock pieces 85 are pinched with two fingers and displaced so as to approach each other to widen the distance between the pair of engagement ends 83, and then the regular hexagonal column of the lock nut 30 between the pair of engagement ends 83. Surface 37 may be inserted.

  The male luer assembly 11 is pushed into the adapter 80 with the regular hexagonal prism surface 37 of the lock nut 30 sandwiched between the pair of engagement ends 83. After a while, the tapered surface 22 of the male luer 20 is inserted into the tubular portion 51 of the adapter 80. When the male luer assembly 11 is further pushed into the adapter 80, the pair of engaging ends 83 that have slid on the regular hexagonal cylinder surface 37 of the lock nut 30 reach the shoulder portion 38 of the lock nut 30, and the bottom plate 55 is elastic. It recovers and the pair of engagement ends 83 and the shoulder portion 38 are engaged. Since the position restricting protrusion 33 of the lock nut 30 and the annular protrusion 24 of the male luer 20 are engaged, the male luer 20 moves together with the lock nut 30 and the pair of engaging ends 83 and the shoulder portion 38 are engaged. At the same time, the tapered surface 22 of the male luer 20 and the tapered surface 52 formed on the inner peripheral surface of the tubular portion 51 of the adapter 80 are in close contact with each other. Thus, the adapter 80 can be attached to the male luer assembly 11 as shown in FIGS. 13A, 13B, and 14.

  The male luer assembly 11 and the adapter 80 may be separated from each other by the reverse operation. That is, in the state where the adapter 80 is attached to the male luer assembly 11 as shown in FIGS. 13A, 13B, and 14, the pair of lock pieces 85 are pinched by two fingers and displaced so as to approach each other. The distance between the pair of engagement ends 83 is increased, and the engagement between the pair of engagement ends 83 and the shoulder portion 38 is released. Thereafter, the male luer assembly 11 and the adapter 80 may be pulled apart.

  As described above, in the present embodiment, since the inclined surface is formed at the engagement end 83, when the male luer assembly 11 and the adapter 80 are brought close to each other, the pair of engagement ends 83 is expanded. The grip arm 81 can be elastically swung, and the lock nut 30 can be inserted between the pair of engaging ends 83.

  Thereafter, the adapter 80 can be easily attached to the male luer assembly 11 simply by pushing the male luer assembly 11 into the adapter 80 until the pair of engaging ends 83 and the shoulder portion 38 are engaged. The operator can easily recognize that the pair of engagement ends 83 and the shoulder portion 38 are engaged with each other by touch, preferably with a clicking sound. At the same time when the pair of engaging ends 83 and the shoulder portion 38 are engaged, the tapered surface 22 and the tapered surface 52 conforming to ISO594-1 are brought into close contact with each other, and a liquid-tight seal is formed. Therefore, as in the second embodiment, the tapered surface 22 and the tapered surface 52 can always be properly adhered to each other regardless of the operator.

  The connector 3 of this embodiment can perform a slip connection and a screw lock connection similarly to the connector 1 of the first embodiment.

  A method of claw lock connection between the connector 3 and the needleless port 800 shown in FIG. 19 will be described. In the claw lock connection, the adapter 80 is attached to the male luer assembly 11 as shown in FIGS. 13A, 13B, and 14. Then, the insertion portion 56 of the adapter 80 is inserted into the slit 811 of the septum 810 of the needleless port 800. The adapter 80 is pressed against the needleless port 800 so that the bottom plate 55 of the adapter 80 contacts the upper surface of the needleless port 800. In this state, the adapter 80 is rotated with respect to the needleless port 800. Thereby, the engagement claw 67 formed on the inner peripheral surface of the lock piece 85 of the adapter 80 and the engagement protrusion 807 of the needleless port 800 can be engaged. If the adapter 80 is rotated with respect to the needleless port 800 until one end of the engaging projection 807 comes into contact with the stopper portion 68 adjacent to one end of the engaging claw 67, the engaging claw 67 and the engaging projection 807 are sufficient. Can be engaged deeply. FIG. 17A is a perspective view of a state in which the connector 3 and the needleless port 800 are claw-lock connected as viewed from above, and FIG. 17B is a cross-sectional view thereof.

  As can be understood from FIG. 17B, when the claw lock is connected, the inner peripheral surface of the lock piece 85 is in contact with or close to the outer peripheral surface of the needleless port 800. Accordingly, it is substantially impossible to release the engagement between the engagement end 83 and the shoulder portion 38 by swinging the pair of grip arms 81. Therefore, it is difficult to separate the male luer assembly 11 and the adapter 80 when the claw lock is connected. In the first and second embodiments, there is a possibility that an operator erroneously separates the male luer assembly and the adapter when the claw lock is connected. In this embodiment, since the male luer assembly 11 and the adapter 80 cannot be separated unless the claw lock connection is released, the possibility of erroneous operation by the operator is reduced and the safety is improved.

  To release the claw lock connection, the adapter 80 is rotated with respect to the needleless port 800 in the opposite direction to release the engagement between the engaging claw 67 and the engaging projection 807, and then the adapter 50 is moved to the needleless port 800. Just pull out from.

  As described above, the connector 3 of the present embodiment can perform the three types of connection of the slip connection, the screw lock connection, and the claw lock connection similarly to the connector 1 of the first and second embodiments.

  Further, as in the first and second embodiments, at the time of screw lock connection, it is possible to secure a sufficient area where the female screw 32 of the lock nut 30 and the male screw 853 of the female luer 850 are screwed together. The possibility that the screwing with the male screw 853 is loosened can be reduced.

  Furthermore, since the adapter 80 is not used at the time of screw lock connection, there is no local protrusion in the radial direction and the diameter is small. Therefore, the possibility of making the patient feel uncomfortable is reduced.

  As described in the second embodiment, also in the third embodiment, a male screw 53 may be formed on the outer peripheral surface of the cylindrical portion 51 of the adapter 80 as shown in FIG. The male screw 53 is compliant with ISO594-2, similarly to the male screw 53 provided in the adapter 50 of the first embodiment. When the adapter 80 is attached to the male luer assembly 11, the male screw 53 is screwed with the female screw 32 of the lock nut 30 as in the first embodiment. Accordingly, it is possible to reduce the possibility that the adapter 80 and the male luer assembly 12 are unintentionally separated due to external force or the like.

  When the male screw 53 is formed on the outer peripheral surface of the cylindrical portion 51, when the adapter 80 is attached to and detached from the male luer assembly 11, the adapter 80 is attached to the male luer assembly 11 as in the first embodiment. Need to be rotated. When the engagement end 83 of the grip arm 81 is engaged with the shoulder portion 38, the grip arm 81 is displaced and the rotational torque is changed. The operator can recognize this visually and tactilely. Therefore, when the adapter 80 is attached to the male luer assembly 11, the operator can rotate the adapter 80 with respect to the male luer assembly 11 until the engaging end 83 and the shoulder portion 38 are engaged. Regardless, the taper surface 22 and the taper surface 52 can always be adhered appropriately.

  Further, once the adapter 80 is attached to the male luer assembly 11, the engagement end 83 and the shoulder portion 38 are engaged. Therefore, even if vibration or the like is applied, the screwing of the male screw 53 and the female screw 32 is difficult to loosen.

  In the specific example of the third embodiment, the shoulder portion 38 of the lock nut 30 and the engagement end 83 of the grip arm 81 are engaged, but the engagement structure provided on the lock nut 30 and the grip arm 81 respectively. Is not limited to the above embodiment. For example, the outer peripheral surface of the lock nut 30 is a cylindrical surface having a constant outer diameter, and a groove continuous in the circumferential direction is formed in a part thereof, and the engagement end 83 of the grip arm 81 is engaged with this groove. Good. Alternatively, a groove extending in the circumferential direction may be formed in the engagement end 83 of the grip arm 81, and a convex portion that fits into the groove may be formed on the outer peripheral surface of the lock nut 30.

  In the above-described specific example of the third embodiment, the inclined surface is formed at the engagement end 83, but this surface may not be inclined.

  The male luer 20, the lock nuts 30 and 40, and the adapters 50, 70, and 80 constituting the connectors 1, 2, and 3 of the present invention are not particularly limited, but can be integrally formed using, for example, a resin material. . The resin material that can be used is not particularly limited, and examples thereof include polycarbonate, polypropylene, and polyethylene.

  The field of application of the present invention is not particularly limited, and can be widely used as a connector for connecting different members in a transport line for transporting liquid substances such as chemicals and blood.

1,2,3 connector (medical connector)
11, 12 Male luer assembly 20 Male luer 21 Through hole 22 Tapered surface 23 Base end 24 Annular projection (movement limiting mechanism)
26 Guide protrusion 30 Lock nut 32 Female screw 33 Position restriction protrusion (movement restriction mechanism)
34 Guide way 38 Shoulder part 40 Lock nut 41 Continuous protrusion 50 Adapter 51 Cylindrical part 52 Tapered surface 53 Male thread (engagement structure)
55 Bottom plate 56 Insertion part 60 Grip part 61 Outer cylinder part (annular body)
65 Locking piece 67 Engaging claw 70 Adapter 71 Locking protrusion (engaging structure)
80 Adapter 81 Grip arm (grip part)
82 Engagement piece 83 Engagement end (engagement structure)
800 Needleless port 807 Engaging protrusion 810 Septum (elastic partition member)

Claims (13)

A male luer having a through-hole formed in a longitudinal direction, and a male luer assembly including a lock nut rotatably provided around the male luer;
An adapter detachable from the male luer assembly;
A medical connector that can be connected to a needleless port provided with an elastic partition member in which a slit is formed,
A tapered surface is formed on the outer peripheral surface of the male luer tip,
An internal thread is formed on the inner peripheral surface of the lock nut,
The lock nut is movable in the longitudinal direction of the male luer relative to the male luer;
The male luer assembly includes a movement limiting mechanism that limits a range in which the lock nut can move to the distal end side of the male luer with respect to the male luer,
The adapter is attached to the male luer assembly from the tip side of the male luer,
The adapter is
A cylindrical portion into which the tip of the male luer is inserted;
An insertion portion that communicates with the tubular portion and is insertable into the slit of the elastic partition member;
An engaging claw engageable with an engaging protrusion formed on the outer peripheral surface of the needleless port;
A grip portion covering at least a part of the outer peripheral surface of the lock nut;
A medical connector comprising: an engagement structure that engages with the lock nut.   The medical connector according to claim 1, wherein the engagement structure includes a male screw formed on an outer peripheral surface of the cylindrical portion and screwed into the female screw formed on an inner peripheral surface of the lock nut.   The connector according to claim 2, wherein the male screw conforms to ISO594-2.   The medical connector according to claim 1, wherein the engagement structure includes a member that engages with an outer peripheral surface of the lock nut.   The medical connector according to claim 1, wherein the engagement structure includes a member constituting a snap fit.   The medical connector according to claim 1, wherein the grip portion includes an annular body that is continuous in a circumferential direction. The grip portion includes a pair of elastically swingable grip arms,
The engagement structure that engages with the lock nut is provided at one end of each of the pair of grip arms,
The medical connector according to claim 1, wherein the engaging claws that can be engaged with engaging protrusions formed on an outer peripheral surface of the needleless port are formed at the other ends of the pair of grip arms.   When the engagement structure is engaged with the lock nut and the engagement claw is engaged with an engagement protrusion formed on the outer peripheral surface of the needleless port, the swing of the pair of grip arms is restricted. The medical connector according to claim 7.   The medical connector according to any one of claims 4 to 8, wherein a male screw that engages with the female screw formed on the inner peripheral surface of the lock nut is formed on the outer peripheral surface of the cylindrical portion.   The connector according to any one of claims 1 to 9, wherein the tapered surface formed on the outer peripheral surface of the front end of the male luer conforms to ISO594-1.   The taper surface which fits the taper surface formed in the outer peripheral surface of the front-end | tip of the said male luer is formed in the internal peripheral surface of the said cylindrical part of the said adapter. connector.   The connector according to claim 1, wherein the female screw formed on the inner peripheral surface of the lock nut conforms to ISO594-2.   The connector according to claim 1, wherein when the adapter is attached to the male luer assembly, a part of the outer peripheral surface of the lock nut is exposed in the radial direction.

Images