JP2012055430A - Medical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow three-type connection of slip connection, screw lock connection, and claw lock connection, to make the loosening of the thread engagement of a screw hard to occur when performing the screw lock connection, and to suppress local projection in a diameter direction.SOLUTION: In the medical connector, a lock connector 50 can be attached/detached to/from a male luer assembly 11 wherein a lock nut 30 is rotatably installed around a male luer 20, from a the base end side of the male luer. The lock nut can move in the long direction of the male luer relatively to the male luer. The medical connector includes: a first movement restriction mechanism for restricting a range wherein the lock nut can move to the end side of the male luer relatively to the male luer; and a second movement restriction mechanism for restricting movement of the lock connector to the end side of the male luer relatively to the male luer. The lock connector includes engagement claws 58 capable of engaging with engagement projections formed on the outer circumferential face of a needless port.

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. 14A and 14B, 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.

  FIG. 15A is a perspective view of an example of a conventional male luer assembly 910 as seen from above, and FIG. 15B is a perspective view as seen from below. 16A is a side view of the male luer assembly 910 shown in FIG. 15A, FIG. 16B is a cross-sectional view along the plane including the line 16B-16B in FIG. 16A, and FIG. 16C includes the line 16C-16C in FIG. It is arrow sectional drawing along the surface. FIG. 17 is a perspective view showing a state in which the lock nut 930 of the male luer assembly 910 shown in FIG. 15A 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 FIG. 15B and FIG. 17, a 6% tapered 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 on 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. 16A to 16C, 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. 16C, a pair of guide paths 934 are formed at substantially symmetrical positions on the position restricting projection 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. 16B, 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. Accordingly, 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. 17, the slip connection between the male luer assembly 910 and the female luer having a tapered surface conforming to ISO 594-1 is performed by moving the tapered surface 922 of the male luer 920 to the 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. 18 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. 19B 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. 19A and 19B described later).

  19A is a perspective view of a state in which the male luer assembly 910 and the female luer 850 shown in FIG. 18 are screw-locked as seen from above, and FIG. 19B is a cross-sectional view thereof. 19A and 19B, 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. 14A and 14B will be described.

  20A is a perspective view of a state in which the male luer assembly 910 and the needleless port 800 are claw-lock connected as viewed from above, and FIG. 20B is a cross-sectional view thereof. As shown in FIGS. 20A and 20B, 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 it is screw-locked with the female luer 850 as shown in FIGS. 19A and 19B.

  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. 20A and 20B, 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. 19A and 19B, 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. 19A and 19B, 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.

  A 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 lock nut. And a lock connector that can be attached to and detached from the male luer assembly from the base end side of the male luer, and includes an elastic partition member having a slit formed therein. This is a medical connector that can be connected to a needleless port. 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 medical connector includes a first movement restriction mechanism that restricts a range in which the lock nut can move to the distal end side of the male luer with respect to the male luer. In addition, the medical connector includes a second movement restriction mechanism that restricts movement of the lock connector to the distal end side of the male luer with respect to the male luer. The lock connector includes an engaging claw that can engage with an engaging protrusion formed on an outer peripheral surface of the kneeless port.

  The medical connector of the present invention is capable of slip connection with a male luer alone without using a lock nut and a lock connector, and without using a lock connector, and mounting a lock nut on the male luer for screw lock connection. In addition, a claw lock connection can be made using a lock connector.

  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 a lock connector is not used when screw locking is connected, 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.

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

  In the medical connector of the present invention, a member formed on the male luer that constitutes the first movement restriction mechanism and a member formed on the male luer that constitutes the second movement restriction mechanism. And are preferably different. This makes it easy to optimally design the protruding length of the male luer tip when the screw lock is connected and when the claw lock is connected.

  It is preferable that the first movement restriction mechanism has an engagement shape formed on an outer peripheral surface of the male luer and the lock nut and engaging each other. This makes it easy to optimally design the protruding length from the lock nut at the tip of the male luer when the screw lock is connected.

  Moreover, it is preferable that the said 2nd movement restriction | limiting mechanism is an engagement shape formed in the outer peripheral surface of the said male luer and the said lock connector which mutually engages. This makes it easy to optimally design the protruding length of the male luer tip from the lock connector when the claw lock is connected.

  The lock connector is preferably penetrated by a flexible tube connected to the base end of the male luer and is movable on the tube. This prevents the lock connector from being lost when the lock connector is not used.

  In the above, it is preferable that whether or not the lock connector can be moved on the tube can be switched reversibly. By preventing the lock connector from moving on the tube when the lock connector is not used, it is possible to solve the problem that the lock connector is obstructed by the movement of the lock connector freely on the tube. In addition, since the lock connector can be fixed at a position on the tube near the male luer assembly, the lock connector is immediately moved along the tube to the male luer assembly when a claw lock connection is made thereafter. Workability is improved.

  It is preferable that the lock connector has an opening through which the tube passes, and a notch for sandwiching the tube is formed at an edge of the opening. Accordingly, the lock connector can be fixed at an arbitrary position on the tube with a simple structure.

  In the above, it is preferable that the edge shape of the notch includes an arc. Thereby, since the contact area of the edge of a notch and a tube expands, a lock connector can be stably fixed on a tube.

  The lock connector is preferably an annular body that is continuous in the circumferential direction. Thereby, the mechanical strength of the lock connector is improved. Further, when the lock connector is not used, the possibility that the lock connector falls off from the tube connected to the male luer is reduced.

  The lock connector may be detachable from the tube. Thereby, when not using a lock connector, a lock connector can be removed from a tube. As a result, there is a problem that an unused lock connector moves freely on the tube, and the lock connector interferes with the work, and when performing a claw lock connection, the lock connector is connected to the male luer assembly along the tube. It is possible to solve the problem of having to move long distances.

  In the above, it is preferable that the lock connector has a slit through which the tube can pass. In this case, it is preferable that the connector can be attached to and detached from the tube by passing the tube through the slit. Thereby, the lock connector which can be attached or detached with respect to a tube with a simple structure is realizable. In addition, the mechanical strength of the lock connector due to the formation of the slit can be reduced only slightly.

  Alternatively, the lock connector preferably includes a pair of halves that can be opened and closed, and a locking member for maintaining the closed state of the pair of halves. In this case, it is preferable that the connector can be attached to and detached from the tube by opening the pair of halves. Thereby, the lock connector which can be attached or detached with respect to a tube with a simple structure is realizable.

  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 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 lock connector is mounted on the male luer assembly, it is preferable that the lock nut can be rotated around the male luer via the lock connector. Thereby, a larger rotational torque can be applied to the female screw of the lock nut.

  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)
FIG. 1 is a perspective view of a medical connector (hereinafter simply referred to as “connector”) 1 according to Embodiment 1 of the present invention. The connector 1 according to the first embodiment includes a male luer 20, a lock nut 30, and a lock connector 50. FIG. 1 shows a state where they are separated from each other. A flexible tube 29 is connected to the base end 23 of the male luer 20. The tube 29 penetrates the lock nut 30 and the lock connector 50 in this order.

  2A is a perspective view of the male luer 20 fitted with a lock nut 30 to constitute the male luer assembly 11, and is seen from above, FIG. 2B is a perspective view seen from below, and FIG. 3 is a sectional view thereof. It is. 2A, 2B, and 3, the male luer assembly 11 and the lock connector 50 are separated.

  4A is a perspective view seen from above the connector 1 with the lock connector 50 attached to the male luer assembly 11, FIG. 4B is a perspective view seen from below, and FIG. 5 is a sectional view thereof.

  For convenience of the following description, the upper side of the paper surface of FIG. 1 is called the “upper side” of the connector 1, and the lower side of the paper surface of FIG. 1 is called the “lower side” of the connector 1. 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. 6 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. 1, 2A, 2B, and 3). 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 25 having a constant outer diameter, and a pair of guide protrusions 26 are formed on the cylindrical surface 25 at symmetrical positions. The outer diameter of the cylindrical surface 25 is larger than the outer diameter of the tube 29.

  7A is a perspective view of the lock nut 30 as viewed from above, FIG. 7B is a perspective view of the lock nut 30 as viewed from below, FIG. 7C is a plan view thereof, and FIG. 7D is a cross-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 first cylindrical surface 36, and the lower part is a second cylindrical surface 37 having a slightly larger diameter than the cylindrical surface 36. On the second cylindrical surface 37, a plurality of ridges 38 protruding in the radial direction and extending in the vertical direction are formed at equal angular intervals. In addition, the shape of the outer peripheral surface of the lock nut 30 is not limited to the above configuration.

  As shown in FIG. 1, the tube 29 connected to the male luer 20 is inserted into the lock nut 30 with the side on which the female screw 32 of the lock nut 30 is formed facing the male luer 20. In this state, the base end 23 of the male luer 20 can be inserted into the lock nut 30. 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. 3, 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. Thus, as shown in FIGS. 2A and 2B, the male luer assembly 11 in which the lock nut 30 is attached to the male luer 20 can be assembled. At this time, the lock nut 30 can freely rotate around the male luer 20.

  On the other hand, as shown in FIG. 3, 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. Is done. Therefore, the annular protrusion 24 and the position restricting protrusion 33 constitute a first movement restriction mechanism that restricts the range in which the lock nut 30 can move toward the distal end side of the male luer 20 with respect to 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. Therefore, the lock nut 30 can be separated from the male luer 20 and moved onto the tube 29 as shown in FIG.

  As shown in FIG. 3, the distance between the annular protrusion 24 formed on the outer peripheral surface of the male luer 20 and the guide protrusion 26 is the vertical direction of the position restricting protrusion 33 formed on the inner peripheral surface of the lock nut 30. Greater than dimensions. Therefore, in the state where the lock nut 30 is attached to the male luer 20 as shown in FIGS. 2A, 2B, and 3, the lock nut 30 can move up and down with respect to the male luer 20 within a limited range. is there.

  8A is a perspective view seen from above the lock connector 50, FIG. 8B is a perspective view seen from below, and FIG. 8C is a cross-sectional view thereof. The lock connector 50 includes a substantially cylindrical main body 51, a top plate 54 provided at the upper end of the main body 51, and a pair of lock pieces 57 provided at the lower end of the main body 51.

  The main body 51 has a substantially cylindrical shape as a whole, and a pair of gripping surfaces 52 are formed on the outer peripheral surface thereof so that the lock connector 50 can be easily gripped with two fingers. The inner peripheral surface of the main body 51 is a substantially cylindrical surface having an inner diameter capable of accommodating the lock nut 30 therein (see FIGS. 4B and 5). A plurality of grooves 53 that engage with a plurality of protrusions 38 (see FIGS. 7A and 7B) formed on the outer peripheral surface of the lock nut 30 are formed on the inner peripheral surface of the main body 51 at equal angular intervals in the vertical direction. Is formed. Since the main body 51 is an annular body that is continuous in the circumferential direction, the lock connector 50 has high mechanical strength.

  The top plate 54 has a substantially disk shape that covers the upper end of the main body 51, and a circular opening 55 is formed at the center thereof. The inner diameter of the opening 55 is larger than the outer diameter of the cylindrical surface 25 of the male luer 20 and the outer diameter of the tube 29, and smaller than the diameter of the circumscribed circle at the top of the pair of guide protrusions 26 of the male luer 20.

  The pair of lock pieces 57 protrudes downward from the lower end of the main body 51 so as to be continuous with the pair of gripping surfaces 52. The mutually opposing surfaces (inner peripheral surfaces) of the pair of lock pieces 57 constitute a cylindrical surface coaxial with the inner peripheral surface of the main body 51 and the opening 55 of the top plate 54. An engagement claw 58 extending in the circumferential direction and a stopper portion 59 extending upward from one end in the circumferential direction of the engagement claw 58 are formed on the inner peripheral surface of each lock piece 57. Both the locking claw 58 and the stopper portion 59 protrude toward the opposing lock piece 57 on the inner peripheral surface of the lock piece 57. The pair of lock pieces 57 may be continuous in the circumferential direction similarly to the lock portion 940 shown in FIGS. 16A to 16C, and the locking claw 58 and the stopper portion 59 may be formed on the inner peripheral surface thereof.

  As shown in FIG. 1, the side of the lock connector 50 on which the lock piece 57 is formed is the male luer 20 side, and the tube 29 connected to the male luer 20 and passing through the lock nut 30 is connected to the lock connector 50. Is inserted. Furthermore, in a state where the male luer assembly 11 is assembled by attaching the lock nut 30 to the male luer 20 (see FIGS. 2A, 2B, and 3), the lock connector 50 can be covered with the lock nut 30. As a result, the lock nut 30 can be housed in the lock connector 50 as shown in FIGS.

  At this time, the cylindrical surface 25 of the male luer 20 passes through the opening 55 of the top plate 54 of the lock connector 50. However, the inner diameter of the opening 55 of the lock connector 50 is smaller than the diameter of the circumscribed circle at the top of the pair of guide protrusions 26 of the male luer 20. Accordingly, since the top plate 54 (that is, the edge of the opening 55) and the guide projection 26 collide, the lock connector 50 is restricted from moving toward the tip (tapered surface 22) side with respect to the male luer 20. The Accordingly, the top plate 54 (or the edge of the opening 55) and the guide protrusion 26 constitute a second movement restriction mechanism that restricts the range in which the lock connector 50 can move relative to the male luer 20 toward the distal end side of the male luer 20. To do.

  In a state where the top plate 54 and the guide protrusion 26 collide, the tapered surface 22 of the male luer 20 protrudes downward from the main body 51 of the lock connector 50 by a predetermined length.

  Further, in the state where the lock nut 30 is housed in the lock connector 50, the plurality of protrusions 38 formed on the outer peripheral surface of the lock nut 30 are fitted with the plurality of grooves 53 formed on the inner peripheral surface of the lock connector 50. Match. Accordingly, when the lock connector 50 is rotated with respect to the male luer 20, the lock nut 30 accommodated therein rotates with the lock connector 50. On the other hand, the lock nut 30 can move up and down independently of the lock connector 50 within the limited range described above with respect to the male luer 20.

  Separation of the lock connector 50 and the male luer assembly 11 from the state shown in FIGS. 4A, 4B, and 5 is performed as follows. That is, a force is applied to the male luer 20 so that the base end 23 of the male luer 20 is pushed into the opening 55 of the lock connector 50. Since the guide protrusion 26 of the male luer 20 engages with the position restricting protrusion 33 of the lock nut 30, the lock nut 30 moves together with the male luer 20, and as shown in FIGS. 2A, 2B, and 3, the lock connector 50 is moved. You can get out of it.

  In the above description, the example in which the lock connector 50 is put on the lock nut 30 (see FIGS. 2A, 2B, and 3) attached to the male luer 20 has been described. Of course, it is also possible to put the lock connector 50 on the lock nut 30 (see FIG. 1) which is not provided.

  As described above, the connector 1 of the present embodiment includes the male luer 20, the lock nut 30 and the lock connector 50 into which the tube 29 connected to the male luer 20 is inserted. The male luer assembly 11 can be assembled by attaching the lock nut 30 to the male luer 20, and the connector 1 can be assembled by covering the lock nut 30 with the lock connector 50. Further, if the reverse operation is performed, the lock connector 50 and the lock nut 30 can be sequentially separated from the male luer 20. The operation of assembling and separating the connector 1 is simple and requires no skill. Further, in the separated state (see FIG. 1), since the tube 29 connected to the male luer 20 is inserted into the lock nut 30 and the lock connector 50, some components of the connector 1 are not lost. .

  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. As shown in FIG. 1, the lock nut 30 is moved onto the tube 29. 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. 18 having a male screw conforming to ISO594-2 will be described. In this case, as shown in FIGS. 2A, 2 </ b> B, and 3, the male luer 20 is attached with a lock nut 30 to constitute the male luer assembly 11. The lock nut 30 is disposed on the male luer 20 such 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. 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. 9A is a side view showing a state in which the male luer assembly 11 and the female luer 850 are screw-locked, and FIG. 9B 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. The lock connector 50 is not lost because the tube 29 connected to the male luer 20 is inserted. To release the screw lock connection, the lock nut 30 may be rotated in the opposite direction to the female luer 850.

  The screw lock connection and / or the screw lock connection may be released in a state where the lock connector 50 is put on the lock nut 30. In this case, the lock connector 50 is pinched with a finger and rotated. Since the plurality of protrusions 38 on the outer peripheral surface of the lock nut 30 and the plurality of grooves 53 on the inner peripheral surface of the lock connector 50 are fitted, rotational torque can be transmitted to the lock nut 30. By rotating the lock connector 50 having an outer diameter larger than that of the lock nut 30, a larger rotational torque can be applied to the screwed portion between the female screw 32 and the male screw 853. Accordingly, a more liquid-tight seal can be formed by the tapered surfaces 22 and 852.

  However, the protrusion 38 and the groove 53 are not essential in the present invention, and these may be omitted.

  A claw lock connection with the needleless port 800 shown in FIGS. 14A and 14B will be described. In this case, the lock connector 50 is attached to the male luer assembly 11 as shown in FIGS. 4A, 4B, and 5. The pair of gripping surfaces 52 of the lock connector 50 are pinched with fingers, and the tapered surface 22 of the male luer 20 is inserted into the slit 811 of the septum 810 of the needleless port 800. Since the top plate 54 of the lock connector 50 (that is, the edge of the opening 55) and the pair of guide protrusions 26 of the male luer 20 are engaged, the male luer 20 moves together with the lock connector 50. The lock connector 50 is pressed against the needleless port 800 so that the lower end of the main body 51 of the lock connector 50 contacts the upper surface of the needleless port 800. In this state, the lock connector 50 is rotated with respect to the needleless port 800. Thereby, the engagement claw 58 formed on the inner peripheral surface of the lock piece 57 of the lock connector 50 and the engagement protrusion 807 of the needleless port 800 can be engaged. If the lock connector 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 59 adjacent to one end of the engaging claw 58, the engaging claw 58 and the engaging projection 807 are moved. Enough engagement can be achieved. FIG. 10A 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. 10B is a cross-sectional view thereof. To release the claw lock connection, the lock connector 50 is rotated with respect to the needleless port 800 in the reverse direction to release the engagement between the engagement claw 58 and the engagement projection 807, and then the male luer 20 is needleless. Just pull out from the port 800.

  As described above, the connector 1 of the present embodiment includes the male luer 20, the lock nut 30, and the lock connector 50 that can be reversibly mounted and separated. Therefore, the slip connection can be performed without using the lock connector 50 and the lock nut 30 (that is, with the lock nut 30 and the lock connector 50 retracted). The screw lock connection can be performed by attaching the lock nut 30 to the male luer 20 and assembling the male luer assembly 11. The claw lock connection can be performed in a state where the lock connector 50 is put on the lock nut 30 of the male luer assembly 11.

  When the claw lock is connected (see FIGS. 10A and 10B), the movement of the male luer 20 toward the base end 23 side causes the pair of guide projections 26 of the male luer 20 to move to the top plate 54 (the end of the opening 55). (Second movement restriction mechanism). Therefore, the protruding length of the tapered surface 22 at the tip of the male luer 20 from the lock connector 50 is the arrangement of the pair of guide protrusions 26 and the top plate 54 (the edge of the opening 55) regardless of the lock nut 30 ( That is, it is determined by the configuration of the second movement restriction mechanism. Therefore, the protruding length of the tapered surface 22 of the male luer 20 when the claw lock is connected can be set as long as necessary.

  On the other hand, when the screw lock is connected (see FIGS. 9A and 9B), the movement of the male luer 20 toward the base end 23 is such that the annular protrusion 24 of the male luer 20 engages the position restricting protrusion 33 of the lock nut 30. Restricted by (first movement restriction mechanism). Therefore, the protruding length of the tapered surface 22 at the tip of the male luer 20 from the lock nut 30 (more precisely, the vertical distance from the tip of the male luer 20 to the female screw 32) is independent of the lock connector 50. , Determined by the arrangement of the annular protrusion 24 and the position restricting protrusion 33 (that is, the configuration of the first movement restriction mechanism). Therefore, unlike the conventional male luer assembly 910 shown in FIGS. 15A, 15B, and 16A to 16C, the protruding length of the tapered surface 22 of the male luer 20 at the time of screw lock connection is permitted by ISO594-2. Within the specified range, it can be designed from the viewpoint of realizing a desirable screw lock connection. 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.

  As in the first embodiment, the male luer 20 is provided with the annular protrusion 24 constituting the first movement restriction mechanism and the guide protrusion 26 constituting the second movement restriction mechanism as different members. This is preferable because the design of the connector that achieves the above effect is facilitated.

  When the screw lock is connected (see FIGS. 9A and 9B), the position restricting projection 33 of the lock nut 30 abuts on the annular projection 24 of the male luer 20 (first movement limiting mechanism), thereby causing the male luer 20 of the lock nut 30 to move. A position in the vertical direction with respect to is determined. On the other hand, when the claw lock is connected (see FIGS. 10A and 10B), the position restricting protrusion 33 and the annular protrusion 24 are separated, and the lock nut 30 moves upward with respect to the male luer 20. As described above, the vertical position of the lock nut 30 with respect to the male luer 20 changes between the screw lock connection and the claw lock connection. This means that the protrusion length of the tapered surface 22 of the male luer 20 is desirable for each connection method. Since it becomes easy to make it compatible, it is preferable.

  At the time of screw lock connection, the lock connector 50 can be retracted onto the tube 29 as shown in FIGS. 9A and 9B, so that the screw lock connection portion has a diameter as can be understood by comparing with FIGS. 19A and 19B. There is no local protrusion in the direction and the diameter is small. Therefore, the possibility of making the patient feel uncomfortable is reduced.

(Embodiment 2)
In the first embodiment, when the screw lock connection is made as shown in FIGS. 9A and 9B, the lock connector 50 can be freely moved on the tube 29. Therefore, depending on the position of the lock connector 50, the lock connector 50 can be operated. May get in the way. Further, as shown in FIGS. 2A, 2B, and 3, when the claw lock connection (see FIGS. 10A and 10B) is performed from the state where the male luer assembly 11 and the lock connector 50 are separated, the lock connector 50 is used. Is moved to a position far away from the male luer assembly 11, it is necessary to move the lock connector 50 on the tube 29 to the male luer assembly 11, and workability is poor.

  The second embodiment solves the above-described problem of the first embodiment by preventing the lock connector from freely moving on the tube 29 when not in use. The connector of the second embodiment is different from the connector 50 of the first embodiment with respect to the configuration of the lock connector. Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 11 is a perspective view of the lock connector 60 constituting the connector according to the second embodiment as viewed from above. In FIG. 11, the same components as those of the lock connector 50 of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

  An opening 65 having an opening shape including a pair of first arcs 61 and a second arc 62 and a third arc 63 connected to the pair of first arcs 61 is formed in the top plate 54 of the lock connector 60. Yes. In other words, the opening 65 is formed with two arc-shaped notches (that is, the second arc 62 and the third arc 63) at positions opposite to the edge of the circular opening 55 shown in the first embodiment. Has an opening shape similar to

  The center of the first arc 61 is on the central axis of the lock connector 60 (that is, the central axis of the inner peripheral surface of the main body 51). The inner diameter of the region surrounded by the first arc 61 is larger than the outer diameter of the cylindrical surface 25 of the male luer 20 and the outer diameter of the tube 29 and smaller than the diameter of the circumscribed circle at the top of the pair of guide protrusions 26 of the male luer 20.

  The second arc 62 is eccentric with respect to the first arc 61. The inner diameter of the area surrounded by the second arc 62 is smaller than the inner diameter of the area surrounded by the first arc 61, and preferably smaller than the outer diameter of the tube 29.

  The third arc 63 is eccentric to the opposite side of the second arc 62 with respect to the first arc 61. The inner diameter of the area surrounded by the third arc 63 is smaller than both the inner diameter of the area surrounded by the first arc 61 and the inner diameter of the area surrounded by the second arc 62, and preferably smaller than the outer diameter of the tube 29. .

  Each central angle of the second arc 62 and the third arc 63 is preferably larger than 180 ° and smaller than 270 °.

  A method of using the lock connector 60 configured as described above will be described.

  Similar to the lock connector 50 of the first embodiment, the tube 29 passes through the opening 65 of the lock connector 60. Normally, the tube 29 is arranged in a region surrounded by the first arc 61. Since the inner diameter of the first arc 61 is larger than the outer diameter of the tube 29, the lock connector 60 can freely move on the tube 29.

  When the lock connector 60 is not used, such as when the claw lock connection (see FIGS. 10A and 10B) is not performed, the tube 29 in the first arc 61 is moved into the second arc 62. Since the tube 29 has flexibility, it can be slightly deformed to pass the boundary between the first arc 61 and the second arc 62. Since the inner diameter of the second arc 62 is smaller than the inner diameter of the first arc 61, the lock connector 60 moves on the tube 29 due to the frictional force generated between the edge of the second arc 62 and the outer peripheral surface of the tube 29. Is limited. When the inner diameter of the second arc 62 is smaller than the outer diameter of the tube 29, the end edge of the second arc 62 slightly elastically deforms the tube 29, and as a result, a larger frictional force is generated. Movement along 29 is more strongly restricted.

  Depending on the outer diameter, material, and elastic strength of the tube 29, the tube 29 may be moved into the third arc 63 having a smaller inner diameter. In this case as well, the movement of the lock connector 60 along the tube 29 is restricted as in the case where the tube 29 is moved into the second arc 62.

  When it is desired to move the lock connector 60 along the tube 29, the tube 29 in the second arc 62 or the third arc 63 may be moved into the first arc 61.

  As described above, at the end edge of the opening 65 through which the tube 29 of the lock connector 60 of the present embodiment passes, the cutout (that is, the second arc 62 and the second arc 62 and the tube 29 can be held by the end edge). A third arc 63) is formed. When the lock connector 60 is not used, the lock connector 60 can be fixed on the tube 29 by moving the tube 29 into the notch. As a result, when the lock connector moves freely on the tube 29 when not in use, the lock connector is obstructed to work or the claw lock connection (see FIGS. 10A and 10B) is performed. The problem of the lock connector 50 according to the first embodiment, such as the necessity to move the long distance to the male luer assembly 11 along the line, is solved.

  Similarly to the lock connector 50 of the first embodiment, since the lock connector 60 is penetrated through the tube 29 even when not in use, the lock connector 60 is not lost.

  As shown in FIG. 11, the tube 29 can be stably held in the region by making the edge shape of the notch into an arc.

  However, the edge shape of the cutout may be any shape that can hold the tube 29 and is not limited to an arc. For example, it may be a fixed-width notch (substantially rectangular notch) having a pair of opposing parallel sides.

  The number of notches formed at the edge of the opening 65 is not limited to two as in the above embodiment, and may be smaller or larger than this.

  In the present embodiment, depending on the design of the opening 65, the guide protrusion 26 of the male luer 20 may pass through the notch, and the second movement restriction mechanism may not function effectively. In such a case, the design of the opening 65 including the number, arrangement, dimensions, etc. of the notches, and the number, arrangement, dimensions, etc. of the guide lugs 26 of the male luer 20 may be changed as appropriate.

  The second embodiment is the same as the first embodiment except for the above, and has the same effect as described in the first embodiment.

(Embodiment 3)
In the second embodiment, the lock connector that can be fixed on the tube 29 when the lock connector is not used has been described. In the third embodiment, a lock connector that can be removed from the tube 29 when the lock connector is not used will be described. The connector of the third embodiment is different from the connectors 50 and 60 of the first and second embodiments with respect to the configuration of the lock connector. Hereinafter, the second embodiment will be described focusing on differences from the first embodiment.

  FIG. 12 is a perspective view of the lock connector 70 constituting the connector according to the third embodiment as viewed from above. In FIG. 12, the same components as those of the lock connector 50 of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

  The lock connector 70 is formed with a slit 71 extending in the vertical direction from the opening 55 of the top plate 54 to the lower end of the main body 51. That is, the top plate 54 and the main body 51 are divided in the circumferential direction by the slit 71, and the lock connector 70 has a substantially C shape when viewed from above. The circumferential width W of the slit 71 is smaller than the inner diameter of the opening 55, preferably equal to or smaller than the outer diameter of the tube 29, and more preferably smaller than the outer diameter of the tube 29.

  A method of using the lock connector 70 configured as described above will be described.

  Similar to the lock connector 50 of the first embodiment, the tube 29 passes through the opening 55 of the top plate 54 of the lock connector 70. Since the inner diameter of the opening 55 is larger than the outer diameter of the tube 29, the lock connector 70 can freely move on the tube 29. Further, since the width W of the slit 71 is smaller than the inner diameter of the opening 55, and preferably less than or equal to the outer diameter of the tube 29, it is difficult for the tube 29 to pass through the slit 71.

  When the lock connector 70 is not used, such as when the claw lock connection (see FIGS. 10A and 10B) is not performed, the tube 29 is passed through the slit 71 and the lock connector 70 is removed from the tube 29. Since the tube 29 has flexibility, even when the width W of the slit 71 is smaller than the outer diameter of the tube 29, the slit 71 can be easily passed through if the tube 29 is slightly compressed and deformed.

  When the removed lock connector 70 is attached to the tube 29, the tube 29 may be passed through the slit 71, contrary to the above.

  As described above, the lock connector 70 of the present embodiment is formed with the slit 71 through which the tube 29 can pass. When the lock connector 70 is not used, the tube 29 is passed through the slit 71 and the lock connector 70 is removed from the tube 29. As a result, when the lock connector moves freely on the tube 29 when not in use, the lock connector is obstructed to work or the claw lock connection (see FIGS. 10A and 10B) is performed. The problem of the lock connector 50 according to the first embodiment, such as the necessity of moving a long distance to the male luer 20 along the line, is solved.

  FIG. 13 is a perspective view of the lock connector 80 constituting the connector according to the third embodiment as viewed from above. In FIG. 13, the same components as those of the lock connector 50 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The lock connector 80 has a pair of half bodies 80a and 80b having substantially the same configuration as that obtained by dividing the lock connector 50 of the first embodiment into two along a plane passing through the central axis. The half body 80a and the half body 80b are connected so as to be openable and closable by a hinge 81 provided at one side end in the circumferential direction. Locking claws 83a and 83b are provided on the side ends of the half bodies 80a and 80b opposite to the hinges 81. When the half bodies 80a and 80b are closed (superimposed) and the latching claws 83a and 83b are engaged, the half bodies 80a and 80b can be kept closed (not shown).

  A method of using the lock connector 80 configured as described above will be described.

  Usually, the latching claws 83a and 83b are engaged to close the half bodies 80a and 80b. Then, similarly to the lock connector 50 of the first embodiment, the tube 29 is passed through the opening 55 of the top plate 54 of the lock connector 80. Since the inner diameter of the opening 55 is larger than the outer diameter of the tube 29, the lock connector 80 can freely move on the tube 29.

  When the lock connector 80 is not used, such as when the claw lock connection (see FIGS. 10A and 10B) is not performed, the engaging claws 83a and 83b are disengaged, and the half bodies 80a and 80b are opened and locked. The connector 80 is removed from the tube 29.

  When the removed lock connector 80 is attached to the tube 29, conversely to the above, the halves 80a and 80b are closed so that the tube 29 is positioned in the opening 55, and the locking claws 83a and 83b are engaged. You can do it.

  The structure of the locking member for maintaining the closed state of the half bodies 80a and 80b is not limited to the locking claws 83a and 83b shown in FIG. The locking member does not need to be integrally fixed to the halves 80a and 80b, and may be a member movable with respect to at least one of the halves 80a and 80b, for example. Further, the locking member may include a member different from the half bodies 80a and 80b.

  As described above, the lock connector 80 according to this embodiment includes the halves 80a and 80b that can be opened and closed, and the locking members (locking claws 83a and 83b) that maintain the closed states of the halves 80a and 80b. When the lock connector 80 is not used, the half bodies 80 a and 80 b are opened and the lock connector 80 is removed from the tube 29. As a result, when the lock connector moves freely on the tube 29 when not in use, the lock connector is obstructed to work or the claw lock connection (see FIGS. 10A and 10B) is performed. The problem of the lock connector 50 according to the first embodiment, such as the necessity of moving a long distance to the male luer 20 along the line, is solved.

  The male luer 20, the lock nut 30, and the lock connectors 50, 60, 70, and 80 constituting the connector 1 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 Connector (medical connector)
11 Male Luer Assembly 20 Male Luer 21 Through Hole 22 Tapered Surface 23 Base End 24 Annular Projection (First Movement Limiting Mechanism)
26 Guide protrusion (second movement restriction mechanism)
29 Tube 30 Lock nut 32 Female thread 33 Position restricting projection (first movement limiting mechanism)
34 guide path 38 ridge 50 lock connector 51 main body 52 gripping surface 53 groove 54 top plate (second movement restriction mechanism)
55 Opening 57 Locking piece 58 Engaging claw 60 Lock connector 61 First arc 62 Second arc (notch)
63 3rd circular arc (notch)
65 Opening 70 Lock connector 71 Slit 80 Lock connector 80a, 80b Half body 81 Hinge 83a, 83b Locking claw (locking member)

Claims (15)

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;
A lock connector that can be attached to the male luer assembly from the base end side of the male luer so as to cover the lock nut, and can be detached 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;
A first movement restriction mechanism for restricting a range in which the lock nut can move to the distal end side of the male luer with respect to the male luer;
A second movement restriction mechanism for restricting movement of the lock connector to the distal end side of the male luer relative to the male luer;
The medical connector according to claim 1, wherein the lock connector includes an engaging claw that can engage with an engaging protrusion formed on an outer peripheral surface of the needless port.   The medical device according to claim 1, wherein a member formed on the male luer constituting the first movement restriction mechanism is different from a member formed on the male luer constituting the second movement restriction mechanism. Connector.   3. The medical connector according to claim 1, wherein the first movement restriction mechanism has an engagement shape formed on an outer peripheral surface of the male luer and the lock nut and engaging with each other.   The medical connector according to any one of claims 1 to 3, wherein the second movement restriction mechanism has an engagement shape formed on an outer peripheral surface of the male luer and the lock connector and engaging with each other.   The medical connector according to claim 1, wherein the lock connector is penetrated by a flexible tube connected to the proximal end of the male luer and is movable on the tube.   The medical connector according to claim 5, wherein whether or not the lock connector can move on the tube can be switched reversibly. The lock connector has an opening through which the tube passes,
The medical connector according to claim 5 or 6, wherein a notch for sandwiching the tube is formed at an edge of the opening.   The medical connector according to claim 7, wherein an edge shape of the notch includes an arc.   The medical connector according to claim 1, wherein the lock connector is an annular body that is continuous in a circumferential direction.   The medical connector according to claim 5, wherein the lock connector is detachable from the tube. The lock connector has a slit through which the tube can pass,
The medical connector according to claim 5 or 10, wherein the connector can be attached to and detached from the tube by passing the tube through the slit. The lock connector includes a pair of halves that can be opened and closed, and a locking member for maintaining the closed state of the pair of halves,
The medical connector according to claim 5 or 10, wherein the connector can be attached to and detached from the tube by opening the pair of halves.   The connector according to any one of claims 1 to 12, wherein the tapered surface formed on the outer peripheral surface of the front end of the male luer conforms to ISO594-1.   The connector according to any one of claims 1 to 13, wherein the female screw formed on the inner peripheral surface of the lock nut conforms to ISO594-2.   The medical connector according to claim 1, wherein when the lock connector is mounted on the male luer assembly, the lock nut can be rotated around the male luer via the lock connector.

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