JP5812314B2 - Medical male connector and medical connector - Google Patents

Description

  The present invention relates to a medical male connector. The present invention also relates to a medical connector comprising a medical male connector and a needleless port.

  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, a liquid feeding tube, and the like. A connector (or connector) is used to detachably connect different members.

  An example of such a connector is described in Patent Document 1. The connector will be described below.

  FIG. 16A is a side view of a male connector 900 constituting this connector, and FIG. 16B is a sectional view thereof. The male connector 900 includes a tube body 901 through which a liquid material passes. One end of the tube body 901 is an insertion portion 902 to be inserted into a needleless port described later, and the other end is a base end portion 903 to which a flexible tube is connected. A hood 905 having a substantially cylindrical shape coaxial with the tube body 901 is provided integrally with the tube body 901 so as to surround the insertion portion 902. A pair of lock levers 910 substantially parallel to the tube body 901 are provided so as to sandwich the tube body 901. The lock lever 910 is connected to the tube body 901 by a support piece 907 provided at a substantially central position in the longitudinal direction. The lock lever 910 includes a lock piece 911 on one side with respect to the support piece 907 and an operation piece 915 on the other side. The hood 905 is cut away so that the lock piece 911 directly faces the insertion portion 902. An engaging claw 912 is formed at the tip of the surface of the lock piece 911 facing the insertion portion 902. On the opposite side of the top 913 of the engaging claw 912 from the support piece 907, a sliding surface 914 that is inclined so as to move away from the insertion portion 902 as the distance from the top 913 increases.

  The lock lever 910 including the lock piece 911 and the operation piece 915 can be regarded as a substantially rigid body. On the other hand, the support piece 907 that supports the lock lever 910 can be bent elastically. Therefore, when the support piece 907 is curved, the pair of lock levers 910 are elastically swung. That is, when the lock pieces 911 are displaced so as to approach each other, the operation pieces 915 are displaced so as to be separated from each other, and conversely, when the lock pieces 907 are displaced so as to be separated from each other, the operation pieces 915 are displaced so as to approach each other. .

  A male connector 900 shown in FIGS. 16A and 16B is connected to a needleless port 950 shown in FIG. The needleless port 950 includes a disk-shaped partition member (hereinafter referred to as “septum”) 951 made of an elastic material such as rubber and having a linear slit (cut) 952 formed at the center. The septum 951 is sandwiched and fixed between a substantially cylindrical base portion 961 and a cap 965. The cap 965 includes a cylindrical portion 966 that fits with the base portion 961, and a top plate 967 provided at one end of the cylindrical portion 966. A circular opening 968 is formed at the center of the top plate 967. The slit 952 of the septum 951 is exposed in the opening 968.

  The connection between the male connector 900 and the needleless port 950 is performed as follows.

  As shown in FIG. 17, the male connector 900 is opposed to the needleless port 950, and the male connector 900 is pressed against the needleless port 950 so that the cap 965 is inserted into the hood 905.

  When the inclined surface 914 of the engaging claw 912 of the lock lever 910 contacts one outer peripheral edge 966a of the cylindrical portion 966 of the cap 965, the support piece 907 is elastically deformed so that the lock pieces 911 are separated from each other. Thereafter, the engaging claws 912 slide on the outer peripheral surface of the cylindrical portion 966. When the top portion 913 of the engaging claw 912 passes the other outer peripheral edge 966b of the cylindrical portion 966, the support piece 907 is elastically recovered and the lock pieces 911 are displaced so as to approach each other, and the engaging claw 912 and the cylindrical portion The outer peripheral edge 966b of the portion 966 is engaged. On the other hand, the insertion portion 902 of the male connector 900 is inserted into the slit 952 of the septum 951.

  As a result, as shown in FIG. 18, the male connector 900 and the needleless port 950 can be connected. Since the engaging claw 912 and the outer peripheral edge 966b are engaged, the male connector 900 and the needleless port 950 are separated even if a pulling force that separates from the needleless port 950 is applied to the male connector 900. There is nothing.

  The male connector 900 and the needleless port 950 are separated as follows.

  The pair of operation pieces 915 of the male connector 900 are displaced so as to approach each other, and the engagement between the engagement claws 912 of the pair of lock pieces 911 and the outer peripheral edge 966b of the cap 965 is released. In this state, the male connector 900 is pulled out from the needleless port 950. The slit 952 of the septum 951 closes as soon as the insertion portion 902 is removed. Since the septum 951 has resealability, the male connector 900 and the needleless port 950 can be repeatedly connected / disconnected.

  The male connector 900 can be locked in a state where the male connector 900 is connected to the needleless port 950 by the elastically swingable lock lever 910 engaging with the needleless port 950. Lever-locked "male connector.

JP 2004-483 A Japanese Patent No. 3389983

  However, the male connector 900 described above has the following problems.

  First, in order to separate the male connector 900 from the needleless port 950, the pair of operation pieces 915 are displaced so as to approach each other with two fingers, and the engagement claw 912 and the cap 965 are engaged. Must be released.

  If the displacement amount of the pair of operation pieces 915 is too small, the engagement between the engagement claw 912 and the cap 965 cannot be released. Further, if the displacement amount of the pair of operation pieces 915 is not uniform, the engagement with the cap 965 may be released for one engagement claw 912, but not for the other engagement claw 912. is there. If the male connector 900 is pulled strongly from the needleless port 950 without noticing these, the male connector 900 may be damaged.

  On the other hand, if the pair of operation pieces 915 are displaced more than necessary to reliably release the engagement between the engagement claws 912 and the cap 965, the deformation amount of the support piece 907 increases. Therefore, the support piece 907 is permanently deformed or damaged.

  When separating the male connector 900 from the needleless port 950, it is a burden on the operator to pay attention to the above and appropriately displace the pair of operation pieces 915.

  Secondly, a pair of operation pieces 915 protrudes greatly from the hood 905. As a result, the overall dimensions of the male connector 900 are large. Further, a tube or the like is caught on the operation piece 915, and workability is reduced.

  This invention solves the problem which said conventional lever lock type male connector has. That is, the present invention is a medical male connector that can be repeatedly connected / disconnected to the needleless port, the separation work for the needleless port is simple, and the possibility of damage due to the separation work is low. An object of the present invention is to provide a medical male connector that can be miniaturized. Moreover, an object of this invention is to provide the medical connector provided with such a medical male connector and a needleless port.

The medical male connector according to the present invention is a needleless port that includes an elastic partition member having a slit formed therein and an engagement hole formed on an outer peripheral surface, and the position of the circumferential edge of the engagement hole is invariant a medical male connector connectable to the needle-less ports, an insertion portion inserted into the slit of the elastic partition wall member, an engagement arm that faces the insertion portion, the engaging arm And an engaging claw that is provided on a surface on the side facing the insertion portion and fits into the engaging hole. A guide inclined toward the at least one side in the circumferential direction centering on the central axis of the insertion portion with respect to the top portion of the engagement claw so that the width dimension of the engagement claw increases as the distance from the insertion portion increases. A surface is formed.

The medical connector according to the present invention is a needleless port that includes an elastic partition member having a slit formed therein and has an engagement hole formed on the outer peripheral surface thereof, and the position of the edge in the circumferential direction of the engagement hole is said needle-less port is unchanged, the insertion portion inserted into the slit of the elastic partition wall member, the engagement arm that faces the insertion portion, and the surface on the side facing the insertion portion of the engaging arm And a medical male connector provided with an engaging claw that fits into the engaging hole. A guide surface that is inclined at the end edge of at least one side in the circumferential direction of the engagement hole of the needleless port so that the opening width of the engagement hole increases as the distance from the central axis of the needleless port increases. Is formed.

  According to the medical male connector of the present invention, the inclined guide surface is formed on at least one side in the circumferential direction with respect to the top of the engaging claw. According to the medical connector of the present invention, the inclined guide surface is formed on at least one side in the circumferential direction of the engagement hole of the needleless port. Therefore, if the male connector is rotated with respect to the needleless port in a state where the male connector and the needleless port are connected, the engaging claw can be removed from the engaging hole. And can be separated. Therefore, the male connector and the needleless port can be separated by a simple operation. Moreover, since the amount of displacement of the engaging claw when the engaging claw escapes from the engaging hole is small, the possibility that the male connector will be damaged by the separation work is low. Moreover, since the operation piece which the conventional male connector had is unnecessary, a male connector can be reduced in size.

1A is a perspective view seen from above the medical male connector according to Embodiment 1 of the present invention, FIG. 1B is a perspective view seen from below, FIG. 1C is a side view thereof, and FIG. 1D is a bottom view thereof. FIG. 2 is a cross-sectional view of the medical male connector according to Embodiment 1 of the present invention along the plane including line 2-2 in FIG. 1C. FIG. 3A is a perspective view of a screw lock type connector connected to the connection portion of the medical male connector according to Embodiment 1 of the present invention, and FIG. 3B is a sectional view thereof. FIG. 4 is a perspective view showing a schematic configuration of a male luer constituting the screw lock type connector. 5A is a perspective view seen from above the lock nut constituting the screw lock type connector, FIG. 5B is a perspective view seen from below, FIG. 5C is a plan view thereof, and FIG. 5D is a sectional view thereof. FIG. 6 is a perspective view of the screw lock type connector in a state where the lock nut is retracted so as not to overlap the male luer. FIG. 7A is a perspective view showing a state where the medical male connector and the screw lock connector according to Embodiment 1 of the present invention are connected, and FIG. 7B is a sectional view thereof. 8A is a perspective view of a needleless port connected to the medical male connector according to Embodiment 1 of the present invention, and FIG. 8B is a cross-sectional view of the needleless port taken along the plane including line 8B-8B in FIG. 8A. It is. FIG. 9 is a cross-sectional view showing a state before connection of the medical male connector and the needleless port according to the first embodiment of the present invention. FIG. 10A is a perspective view showing a state when the medical male connector and the needleless port according to Embodiment 1 of the present invention are connected, and FIG. 10B is a cross-sectional view thereof. FIG. 11 is a cross-sectional view of the connected medical male connector and needleless port according to the first embodiment of the present invention along the plane including line 11-11 in FIG. 10B. 12A is a perspective view of a medical male connector according to Embodiment 2 of the present invention as seen from below, FIG. 12B is a side view thereof, FIG. 12C is a bottom view thereof, and FIG. 12D is a plane including a line 12D-12D in FIG. FIG. FIG. 13 is a perspective view of a needleless port according to Embodiment 2 of the present invention. FIG. 14 is a cross-sectional view showing an engagement state between the engagement claw of the male connector and the engagement hole of the needleless port in the second embodiment of the present invention. FIG. 15 is a cross-sectional view of another medical male connector according to the present invention. FIG. 16A is a side view of a conventional lever-lock male connector, and FIG. 16B is a cross-sectional view thereof. FIG. 17 is a side view showing a state before connection of the lever-locked male connector and the needleless port shown in FIG. 16. 18 is a cross-sectional view showing a connected state of the lever-locked male connector and the needleless port shown in FIG.

  In the above male connector of the present invention, it is preferable that when the engaging claw is fitted into the engaging hole, a circumferential edge of the engaging hole is in contact with or faces the guide surface. According to such a preferable configuration, when the male connector is rotated with respect to the needleless port, the guide surface immediately slides on the circumferential edge of the engagement hole, so that the engagement claw is reliably removed from the engagement hole. Can escape.

  In the male connector of the present invention, when the medical male connector is rotated with respect to the needleless port in a state where the medical male connector is connected to the needleless port, the guide of the engaging claw It is preferable that the surface slides on the edge in the circumferential direction of the engagement hole, and the engagement claw escapes from the engagement hole. According to such a preferable configuration, the engaging claw can be surely escaped from the engaging hole.

  In this case, it is preferable that when the engaging claw escapes from the engaging hole, the elastic partition member is elastically recovered and the insertion portion is discharged from the slit. According to such a preferable configuration, the work of separating the male connector and the needleless port can be further simplified.

  In the above male connector of the present invention, it is preferable that the guide surfaces are provided on both sides in the circumferential direction centering on the central axis of the insertion portion with respect to the top portion of the engagement claw. According to such a preferable configuration, the male connector and the needleless port can be separated even if the male connector is rotated in any direction with respect to the needleless port.

  In the above male connector of the present invention, it is preferable that the engaging claw is formed with a sliding surface inclined so as to move away from the insertion portion as it approaches the tip of the engaging arm from the top. According to such a preferable configuration, it is possible to connect the male connector and the needleless port simply by bringing the male connector close to the needleless port and pushing it in.

  In the above male connector of the present invention, it is preferable that a plurality of the engagement arms provided with the engagement claws are provided at equiangular intervals with respect to the central axis of the insertion portion. According to such a preferable configuration, since the male connector and the needleless port can be locked at a plurality of positions arranged at equal angular intervals, the male connector and the needleless port can be stably connected.

  A medical connector may be configured by combining the male connector of the present invention and the needleless port.

  Next, in the medical connector according to the present invention described above, it is preferable that when the engagement claw is fitted into the engagement hole, the engagement claw contacts or faces the guide surface of the engagement hole. . According to such a preferable configuration, when the male connector is rotated with respect to the needleless port, the engaging claw immediately slides on the guide surface, so that the engaging claw can be reliably escaped from the engaging hole. .

  In the medical connector of the present invention, when the medical male connector is rotated with respect to the needleless port in a state where the medical male connector and the needleless port are connected, the engaging claw Preferably slides on the guide surface, and the engaging claw escapes from the engaging hole. According to such a preferable configuration, the engaging claw can be surely escaped from the engaging hole.

  In this case, it is preferable that when the engaging claw escapes from the engaging hole, the elastic partition member is elastically recovered and the insertion portion is discharged from the slit. According to such a preferable configuration, the work of separating the male connector and the needleless port can be further simplified.

  In the medical connector according to the present invention, it is preferable that the guide surfaces are provided on both sides in the circumferential direction of the engagement hole. According to such a preferable configuration, the male connector and the needleless port can be separated even if the male connector is rotated in any direction with respect to the needleless port.

  In the medical connector according to the present invention, the outer surface of the needleless port is located in a region between the edge on the medical male connector side and the engagement hole as the engagement hole approaches. It is preferable that a sliding surface inclined so as to be away from the central axis of the needleless port is formed. According to such a preferable configuration, it is possible to connect the male connector and the needleless port simply by bringing the male connector close to the needleless port and pushing it in.

  In the medical connector according to the present invention described above, the engagement claw is gradually moved away from the insertion portion toward at least one side in a circumferential direction centering on a central axis of the insertion portion with respect to a top portion of the engagement claw. It is preferable that an inclined second guide surface is formed so as to increase the width dimension of the first guide surface. According to such a preferable configuration, when the male connector is rotated with respect to the needleless port, the second guide surface of the male connector slides on the guide surface of the needleless port. It is possible to escape more smoothly.

  In the medical connector according to the present invention described above, the engaging claw is formed with a second sliding surface inclined so as to move away from the insertion portion as it approaches the tip of the engaging arm from the top. Is preferred. According to such a preferable configuration, when the male connector approaches and is pushed into the needleless port, the second sliding surface of the male connector slides on the sliding surface of the needleless port. It can be smoothly guided and inserted into the hole.

  In the medical connector according to the present invention, a plurality of the engagement holes are provided at equiangular intervals with respect to the central axis of the needleless port, and the engagement arm provided with the engagement claw includes: It is preferable that a plurality of the insertion portions are provided at equiangular intervals with respect to the central axis. According to such a preferable configuration, since the male connector and the needleless port can be locked at a plurality of positions arranged at equal angular intervals, the male connector and the needleless port can be stably connected.

  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 male connector (hereinafter simply referred to as “male connector”) 40 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. FIG. 1D is a bottom view thereof. For convenience of the following description, the upper side of the paper surface of FIG. 1C is referred to as the “upper side” of the male connector 40, and the lower side of the paper surface of FIG. 1C is referred to as the “lower side” of the male connector 40. In addition, this up-down direction of the male connector 40 does not mean the posture in a situation where the male connector 40 is actually used.

  As shown in FIGS. 1A, 1B, and 1C, the male connector 40 includes a connection portion 41 and an insertion portion 45, both of which have a substantially cylindrical shape. A 6% taper surface 42 conforming to ISO594-1 is formed on the inner peripheral surface of the connecting portion 41, and a male screw 43 conforming to ISO594-2 is formed on the outer peripheral surface of the connecting portion 41. The connection part 41 and the insertion part 45 have a common central axis 40a and communicate with each other.

  A substantially rectangular plate-like support member 46 is provided integrally with the connection portion 41 and the insertion portion 45 at the boundary between the connection portion 41 and the insertion portion 45. A pair of engagement arms 50 are provided at opposite edges of the support member 46 in the major axis direction. The engagement arm 50 extends downward from the support member 46 so as to be substantially parallel to the central axis 40 a and to face the insertion portion 45. The pair of engagement arms 50 can be elastically deformed so that the distance between the lower ends thereof is increased.

  An engagement claw 51 protruding toward the insertion portion 45 is provided on the surface of each engagement arm 50 facing the insertion portion 45. FIG. 2 shows a cross-sectional view taken along the plane including the line 2-2 of FIG. 1C that passes through the top portion 52 that is the portion closest to the insertion portion 45 of the engaging claw 51. As shown in FIG. 2, the engaging claw 51 is inclined so that the width dimension of the engaging claw 51 increases as it moves away from the insertion portion 45 on both sides in the circumferential direction centering on the central axis 40 a with respect to the top 52 of the engaging claw 51. The guide surface 53 is formed. Here, the “width dimension” of the engaging claw 51 means a dimension in the direction (horizontal direction) perpendicular to the vertical direction (the direction of the central axis 40a) of the engaging claw 51 as viewed from the insertion portion 45. The dimension of the engaging claw 51 along the up-down direction of the paper surface of 2 is meant. In the example of FIG. 2, the guide surface 53 is a curved surface curved outwardly, but the present invention is not limited to this, and may be a curved surface curved concavely outward, or a flat surface. There may be.

  Further, as shown in FIG. 1C, a sliding surface 54 is formed on the lower side of the top portion 52 of the engaging claw 51 so as to move away from the insertion portion 45 as it moves downward from the top portion 52. Yes. In this example, the sliding surface 54 is a flat surface, but the present invention is not limited to this, and may be a curved surface curved outward or convex.

  The screw lock connector 10 shown in FIGS. 3A and 3B is connected to the connection portion 41 of the male connector 40. 3A is a perspective view of the screw lock type connector 10, and FIG. 3B is a sectional view thereof. The screw lock connector 10 includes a male luer 20 and a lock nut 30 that is rotatably provided around the male luer 20.

  FIG. 4 is a perspective view showing a schematic configuration of the male luer 20 constituting the screw lock type connector 10. 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 and 3B). 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 extending in parallel in the longitudinal direction are formed on the cylindrical surface 25 at symmetrical positions. Has been.

  5A is a perspective view seen from above the lock nut 30 constituting the screw lock connector 10, FIG. 5B is a perspective view seen from below, FIG. 5C is a plan view thereof, and FIG. 5D 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.

  As shown in FIG. 6, a flexible tube 29 is connected to the base end 23 of the male luer 20. The tube 29 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 so that 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 coincide with each other, The protrusion 26 can pass through the pair of guide paths 34. Therefore, as shown in FIG. 3B, the male luer 20 is positioned such 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. Can be inserted into the lock nut 30. Thus, as shown in FIGS. 3A and 3B, the screw lock connector 10 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. 3B, the annular protrusion 24 and the position restricting protrusion 33 collide, so that the lock nut 30 is restricted from moving toward the tip (tapered surface 22) side with respect to the male luer 20. The

  The connection between the male connector 40 and the screw lock type connector 10 is performed as follows.

  As shown in FIGS. 3A and 3B, 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. In this state, the tapered surface 22 of the male luer 20 is inserted into the tapered surface 42 of the connecting portion 41 of the male connector 40, and the female screw 32 of the lock nut 30 and the male screw 43 of the male connector 40 are screwed together. FIG. 7A is a perspective view showing a state where the male connector 40 and the screw lock type connector 10 are connected, and FIG. 7B is a sectional view thereof. Since the position restricting projection 33 of the lock nut 30 and the annular projection 24 of the male luer 20 are engaged, when the male screw 43 of the male connector 40 and the female screw 32 of the lock nut 30 are screwed together, the male connector 40 The tapered surface 22 of the male luer 20 enters the tapered surface 42. Since both the tapered surfaces 42 and 22 conform to ISO594-1, a liquid-tight seal is formed between the tapered surfaces 42 and 22. When the male connector 40 and the screw lock type connector 10 are separated, the lock nut 30 may be rotated in reverse to the above with respect to the male connector 40.

  8A is a perspective view of the needleless port 100 connected to the male connector 40, and FIG. 8B is a cross-sectional view of the needleless port 100 along the plane including the line 8B-8B in FIG. 8A.

  The needleless port 100 includes a port main body 101, a substantially disc-shaped elastic partition member (hereinafter referred to as “septum”) 110, and a cap 120 attached to the port main body 101. 8A and 8B, reference numeral 100a indicates the central axis of the needleless port 100. For convenience of the following description, the upper side of the paper surface of FIG. 8B is referred to as the “upper side” of the needleless port 100, and the lower side of the paper surface of FIG. Note that this vertical direction of the needleless port 100 does not mean a posture in a situation where the needleless port 100 is actually used.

  The septum 110 is made of an elastic material such as rubber, and a linear slit (cut) 111 is formed at the center thereof. The septum 110 is sandwiched and fixed between the port body 101 and the cap 120. A circular opening 122 is formed at the center of the top plate 121 of the cap 120. The slit 111 of the septum 110 is exposed in the opening 122.

  The cap 120 includes a pair of engagement pieces 123 extending downward from the top plate 121. Each engagement piece 123 is formed with an engagement hole 124 penetrating in a radial direction from the central axis 100a. The cap 120 is fixed to the port body 101 by fitting the locking protrusions 102 of the port body 101 into the engagement holes 124 and engaging them.

  A sliding surface 104 is formed in a region between the upper end edge of the engagement piece 123 (or the outer peripheral edge of the top plate 121) and the engagement hole 124 on the outer surface of the engagement piece 123. The sliding surface 104 is inclined so as to move away from the central axis 100a as it goes downward (on the engagement hole 124 side). In this example, the sliding surface 104 is a flat surface, but the present invention is not limited to this, and may be a curved surface curved outwardly, or a curved surface curved outwardly.

  The outer peripheral surface of the needleless port 100 is a substantially cylindrical surface, and the outer surface of the engagement piece 123 constitutes a part thereof.

  A flow path 105 is formed in the port body 101 along the central axis 100a. A flexible tube 109 is connected to a cylindrical base end 107 at the lower end of the port body 101.

  The connection between the male connector 40 of the first embodiment shown in FIGS. 7A and 7B and the needleless port 100 shown in FIGS. 8A and 8B is performed as follows.

  As shown in FIG. 9, the male connector 40 and the needleless port 100 are opposed to each other and are brought close to each other. The insertion part 45 of the male connector 40 is inserted into the opening 122 of the cap 120. When the male connector 40 is further pushed toward the needleless port 100, the septum 110 is elastically deformed, and the insertion portion 45 can be inserted into the slit 111 of the septum 110.

  In parallel with this, the sliding surface 54 of the engaging claw 51 of the male connector 40 contacts the sliding surface 104 of the cap 120. The sliding surface 54 and the sliding surface 104 are both inclined surfaces that are inclined so as to move away from the central axes 40a and 100a toward the lower side. Therefore, as the male connector 40 is pushed toward the needleless port 100, the sliding surface 54 slides downward on the sliding surface 104 so that the interval between the engaging claws 51 facing each other increases. The pair of engaging arms 50 are elastically deformed. When the top portion 52 of the engagement claw 51 reaches the engagement hole 124, the pair of engagement arms 50 are elastically recovered, the engagement claw 51 is fitted into the engagement hole 124, and is engaged with the engagement claw 51. The hole 124 (more precisely, the upper edge of the engagement hole 124) engages.

  FIG. 10A is a perspective view showing a state when the male connector 40 and the needleless port 100 are connected, and FIG. 10B is a sectional view thereof. The tube 29 and the tube 109 communicate with each other through the male luer 20, the male connector 40, and the needleless port 100. Even when the male connector 40 is pulled with respect to the needleless port 100 along the central axes 40a and 100a, the engaging claw 51 does not come out of the engaging hole 124. Therefore, the male connector 40 and the needleless port 100 are connected to each other. It cannot be separated.

  11 is a cross-sectional view taken along the plane including the line 11-11 in FIG. The guide surfaces 53 formed on both sides in the circumferential direction of the engagement claw 51 are in contact with or opposed to the edges 125 on both sides in the circumferential direction of the engagement hole 124.

  The male connector 40 and the needleless port 100 connected as shown in FIGS. 10A and 10B are separated as follows.

  As shown in FIGS. 10A and 11, the male connector 40 is rotated around the central axes 40 a and 100 a in the direction of the arrow 49 with respect to the needleless port 100. Thus, in FIG. 11, the guide surface 53 located on the front side in the rotation direction 49 of the engagement claw 51 comes into contact with the edge 125 of the engagement hole 124. The guide surface 53 is inclined as described above. Therefore, as the male connector 40 rotates in the rotation direction 49, the guide surface 53 slides on the end edge 125, and the pair of engagement arms 50 is expanded so that the interval between the engagement claws 51 facing each other increases. Elastically deforms. Finally, the engaging claw 51 is completely removed from the engaging hole 124, and the engagement between the engaging claw 51 and the engaging hole 124 is released. Thereby, the restraints in the direction of the central axes 40a and 100a between the male connector 40 and the needleless port 100 are released. Accordingly, the septum 110 (see FIG. 10B) in which the insertion portion 45 has been inserted immediately recovers and the insertion portion 45 is discharged. The male connector 40 may be pulled out from the needleless port 100 as necessary. Thus, the male connector 40 and the needleless port 100 are separated. The slit 111 of the septum 110 from which the insertion portion 45 has been removed is immediately closed.

  In the present embodiment, since the guide surfaces 53 are formed on both sides of the engaging claw 51 in the circumferential direction centering on the central axis 40a, the male connector 40 is opposite to the arrow 49 with respect to the needleless port 100. Even if rotated in the direction, the male connector 40 and the needleless port 100 can be separated in the same manner as described above.

  Since the septum 110 has resealability, the male connector 40 and the needleless port 100 can be repeatedly connected / disconnected.

  As described above, in the first embodiment, when the male connector 40 and the needleless port 100 are connected, the sliding of the male connector 40 is performed before the engagement claw 51 and the engagement hole 124 are engaged. The surface 54 and the sliding surface 104 of the needleless port 100 elastically deform the pair of engaging arms 50. Therefore, the male connector 40 and the needleless port 100 can be connected by simply pushing the male connector 40 into the needleless port 100.

  Further, in a state where the male connector 40 and the needleless port 100 are connected, the male connector 40 and the needleless port 100 can be simply operated by simply rotating the male connector 40 with respect to the needleless port 100. And can be separated. In the conventional lever lock type male connector 900 described above, in order to separate from the needleless port 950, an operation of displacing the pair of operation pieces 915 by a predetermined amount is necessary. In the first embodiment, such an operation is not necessary. In the first embodiment, the elastic deformation amount of the pair of engaging arms 50 for separating the male connector 40 and the needleless port 100 is sufficient if the engaging claws 51 can escape from the engaging holes 124. Therefore, it is slight. Further, since the elastic deformation amount depends on the insertion depth of the engaging claw 51 with respect to the engaging hole 124, it is always substantially constant regardless of the operator. Therefore, the possibility of damaging the male connector 40 due to the separation work of the male connector 40 and the needleless port 100 is extremely low. Further, the pair of operation pieces 915 that are essential in the conventional lever lock type male connector 900 are not necessary in the male connector 40 of the present embodiment. Therefore, there is no large protrusion in the male connector 40, and the male connector 40 can be reduced in size. Further, the possibility that a tube or the like is caught on the male connector 40 is reduced, and workability is improved.

  In the above embodiment, the guide surfaces 53 are formed on both sides in the circumferential direction around the central axis 40 a with respect to the engaging claw 51. In this configuration, even if the male connector 40 is rotated in any direction with respect to the needleless port 100, the male connector 40 and the needleless port 100 can be separated. However, the guide surface 53 may be formed only on one side in the circumferential direction around the central axis 40a with respect to the engaging claw 51. In this case, the male connector 40 and the needleless port 100 are separated only when the male connector 40 is rotated with respect to the needleless port 100 in a direction in which the guide surface 53 contacts the edge 125 of the engagement hole 124. It becomes possible to do.

  The male connector 40, the port main body 101 and the cap 120 constituting the needleless port 100, and the male luer 20 and the lock nut 30 constituting the screw lock connector 10 are not particularly limited, but are integrally formed using, for example, a resin material. be able to. The resin material that can be used is not particularly limited, and examples thereof include polycarbonate, polypropylene, and polyethylene.

(Embodiment 2)
Hereinafter, the second embodiment will be described with a focus on differences from the first embodiment. In the diagram showing the second embodiment, the same members as those shown in the diagram described in the first embodiment are denoted by the same reference numerals, and redundant description thereof will be omitted.

  12A is a perspective view seen from below of the male connector 40 according to the second embodiment, FIG. 12B is a side view thereof, FIG. 12C is a bottom view thereof, and FIG. 12D is along a plane including a line 12D-12D in FIG. It is arrow sectional drawing. In the male connector 40 of the second embodiment, the guide surfaces 53 (see FIGS. 1B, 1D, and 2) that are provided in the first embodiment and are inclined on both sides in the circumferential direction with respect to the top 52 of the engaging claw 51. ) Is not provided. In the second embodiment, the side surfaces 55 on both sides in the circumferential direction with respect to the top portion 52 of the engagement claw 51 are parallel to the direction in which the pair of engagement arms 50 face each other. That is, the width dimension of the engaging claw 51 is constant regardless of the distance from the insertion portion 45.

  FIG. 13 is a perspective view of the needleless port 100 according to the second embodiment of the present invention. In the second embodiment, on both sides of the engagement hole 124 in the circumferential direction, guide surfaces 127 that are inclined so that the opening width of the engagement hole 124 increases as the distance from the central axis 100a (see FIG. 8B) increases. ing. Here, the “opening width” of the engagement hole 124 means a dimension in a direction (horizontal direction) orthogonal to the vertical direction of the engagement hole 124 as viewed along the direction orthogonal to the central axis 100a. Due to the pair of guide surfaces 127, the opening width of the engagement hole 124 increases in a wedge shape as the distance from the central axis 100a increases. In the present embodiment, the guide surface 127 is a flat surface, but the present invention is not limited to this, and may be a curved surface curved outward or convex.

  The male connector 40 and the needleless port 100 of the second embodiment are the same as those of the first embodiment except for the above.

  The connection method between the male connector 40 and the needleless port 100 of the second embodiment is the same as that of the first embodiment. That is, the insertion portion 45 can be inserted into the slit 111 of the septum 110 simply by pushing the male connector 40 toward the needleless port 100, and the engagement claw 51 is fitted into the engagement hole 124 and engaged. The pawl 51 and the engagement hole 124 can be engaged.

  FIG. 14 is a cross-sectional view showing the engagement state between the engagement claw 51 and the engagement hole 124 in the same manner as FIG. 11 in a state where the male connector 40 and the needleless port 100 are connected. Both ends of the top portion 52 of the engaging claw 51 in the circumferential direction are in contact with or opposed to guide surfaces 127 formed on both sides of the engaging hole 124 in the circumferential direction.

  In this embodiment, in order to separate the connected male connector 40 and the needleless port 100, the male connector 40 is connected to the needleless port 100 with respect to the center shafts 40a and 100a, as in the first embodiment. Rotate around in the direction of arrow 49. As a result, the end portion of the top portion 52 of the engagement claw 51 located on the front side in the rotation direction 49 abuts on the guide surface 127 of the engagement hole 124. The guide surface 127 is inclined as described above. Therefore, as the male connector 40 rotates in the rotation direction 49, the top portion 52 of the engaging claw 51 slides on the guide surface 127, and the pair of engaging claws 51 increases so that the interval between the engaging claws 51 facing each other increases. The combined arm 50 is elastically deformed. Finally, the engaging claw 51 is completely removed from the engaging hole 124, and the engagement between the engaging claw 51 and the engaging hole 124 is released. Thereafter, as in the first embodiment, the septum 110 (see FIG. 10B) in which the insertion portion 45 has been inserted immediately recovers and the insertion portion 45 is discharged. The male connector 40 may be pulled out from the needleless port 100 as necessary. Thus, the male connector 40 and the needleless port 100 are separated. The slit 111 of the septum 110 from which the insertion portion 45 has been removed is immediately closed.

  In the present embodiment, since the guide surfaces 127 are formed on both sides of the engagement hole 124 in the circumferential direction around the central axis 40a, the male connector 40 is opposite to the arrow 49 with respect to the needleless port 100. Even if rotated in the direction, the male connector 40 and the needleless port 100 can be separated in the same manner as described above.

  As described above, in the second embodiment, when the male connector 40 is rotated with respect to the needleless port 100, the guide surfaces 127 formed on both sides in the circumferential direction of the engagement hole 124 are the guides of the first embodiment. Similarly to the surface 53, the pair of engagement arms 50 are elastically deformed, and the engagement between the engagement claws 51 and the engagement holes 124 is released. Therefore, similarly to the first embodiment, the male connector 40 and the needleless port 100 can be separated by simply performing an extremely simple operation of rotating the male connector 40 with respect to the needleless port 100.

  In the second embodiment, the guide surfaces 127 are formed on both sides of the engagement hole 124 in the circumferential direction around the central axis 40a. In this configuration, even if the male connector 40 is rotated in any direction with respect to the needleless port 100, the male connector 40 and the needleless port 100 can be separated. However, the guide surface 127 may be formed only on one side in the circumferential direction around the central axis 40a with respect to the engagement hole 124. In this case, the male connector 40 and the needleless port 100 can be separated only when the male connector 40 is rotated with respect to the needleless port 100 in the direction in which the engaging claw 51 abuts on the guide surface 127. It becomes.

  In the second embodiment, at least one of the side surfaces 55 on both sides in the circumferential direction with respect to the top portion 52 of the engaging claw 51 is provided with the inclined guide surface 53 described in the first embodiment (see FIGS. 1B, 1D, and 2). ). In this case, when the male connector 40 is rotated with respect to the needleless port 100 in a state where the male connector 40 and the needleless port 100 are connected, the guide surface 53 comes into contact with and slides against the guide surface 127. The pair of engaging arms 50 are elastically deformed in the same manner as described above. Therefore, the male connector 40 and the needleless port 100 can be separated.

  The second embodiment is the same as the first embodiment except for the above, and has the same effects as the first embodiment.

  Said Embodiment 1, 2 is only an illustration, this invention is not limited to this, It can change suitably.

  For example, the connecting portion 41 of the male connector 40 is connected to the tube 29 via the screw lock connector 10, but the tube 29 may be directly connected to the connecting portion 41 as shown in FIG. . In this case, it is not necessary to form the male screw 43 on the outer peripheral surface of the connecting portion 41. Further, it is not necessary to form the tapered surface 42 on the inner peripheral surface of the connecting portion 41. Moreover, the connection part 41 of the male connector 40 may be connected with the tube 29 by methods other than the above. Furthermore, the connection part 41 of the male connector 40 may be separably or integrally connected to a member other than the tube 29, such as a syringe.

  A hood similar to the hood 905 of the conventional lever lock connector 900 may be provided in the male connector 40. This hood has a substantially cylindrical shape coaxial with the insertion portion 45 and surrounds the insertion portion 45. By providing such a hood, the connection work between the male connector 40 and the needleless port 100 is facilitated.

  In the first and second embodiments, any one of the sliding surface 54 of the male connector 40 and the sliding surface 104 of the needleless port 100 can be omitted. If only one of the sliding surface 54 and the sliding surface 104 is present, the pair of engaging arms 50 are elastically deformed when the male connector 40 is pushed toward the needleless port 100. Similarly to the first and second embodiments, the male connector 40 and the needleless port 100 can be connected.

  In the first and second embodiments, the engaging claws 51 and the engaging holes 124 that are engaged with each other are provided in two symmetrical positions with respect to the central axes 40a and 100a. The number of the joint holes 124 is not limited to two, but may be three or more. Regardless of the number of the engaging claws 51 and the engaging holes 124, it is provided at equal angular intervals with respect to the central shafts 40 a and 100 a for the stable connection between the male connector 40 and the needleless port 100. preferable.

  In the first and second embodiments, the engagement hole 124 into which the engagement claw 51 is fitted is formed in the cap 120, but the present invention is not limited to this. The engagement hole 124 may be formed on the outer peripheral surface which is a substantially cylindrical surface of the needleless port 100. For example, the engagement hole 124 can be formed on the outer peripheral surface of the port body 101.

  In the first and second embodiments, the needleless port 100 is provided at one end of the tube 109, but the present invention is not limited to this. For example, the needleless port 100 may be a mixed injection port (for example, see Patent Document 2) provided in the middle of a tube through which a liquid material flows. Alternatively, the needleless port 100 may be provided in a bag-like material (so-called pouch) made of a flexible material, a container made of a hard material, or the like.

  The field of use of the present invention is not particularly limited, and can be widely used as a male connector and a connection tool for connecting different members in a transport line for transporting a liquid material such as a drug solution or blood.

40 medical male connector 40a central shaft 41 connection portion 45 insertion portion 46 support member 49 rotation direction 50 engagement arm 51 engagement claw 52 engagement claw top 53 engagement claw guide surface 54 engagement claw sliding surface 55 Side surface 100 of engagement claw Needleless port 100a Center shaft 101 Port body 104 Needleless port sliding surface 110 Elastic partition member (septum)
111 Slit 120 Cap 124 Engagement Hole 125 End Edge 127 of Engagement Hole Guide Surface of Engagement Hole

Claims (17)

An elastic partition wall member in which slits are formed, a needleless port to which the engagement hole is formed on an outer peripheral surface, the Needle-less port position in the circumferential direction of the edge is unchanged in the engaging hole A connectable medical male connector,
An insertion portion to be inserted into the slit of the elastic partition member;
An engagement arm facing the insertion portion;
An engagement claw provided on the surface of the engagement arm facing the insertion portion and fitted into the engagement hole;
A guide inclined toward the at least one side in the circumferential direction centering on the central axis of the insertion portion with respect to the top portion of the engagement claw so that the width of the engagement claw increases as the distance from the insertion portion increases. A medical male connector, characterized in that a surface is formed.   The medical male connector according to claim 1, wherein when the engagement claw is fitted into the engagement hole, an end edge in a circumferential direction of the engagement hole abuts or faces the guide surface.   When the medical male connector is rotated with respect to the needleless port in a state where the medical male connector is connected to the needleless port, the guide surface of the engaging claw is in the circumferential direction of the engaging hole. The medical male connector according to claim 1, wherein the engaging claw is slid on the edge of the engaging member and the engaging claw escapes from the engaging hole.   The medical male connector according to claim 3, wherein when the engaging claw escapes from the engaging hole, the elastic partition member is elastically recovered and the insertion portion is discharged from the slit. The medical guide according to any one of claims 1 to 4, wherein the guide surfaces are provided on both sides in a circumferential direction around the central axis of the insertion portion with respect to the top portion of the engaging claw. Male connector. The medical treatment according to any one of claims 1 to 5, wherein the engaging claw is formed with a sliding surface inclined so as to move away from the insertion portion as it approaches the tip of the engaging arm from the top portion. Male connector. The medical male connector according to any one of claims 1 to 6, wherein a plurality of the engagement arms including the engagement claws are provided at equiangular intervals with respect to the central axis of the insertion portion. A medical connector comprising the medical male connector according to any one of claims 1 to 7 and the needleless port. An elastic partition wall member in which slits are formed, a needleless port to which the engagement hole is formed on an outer peripheral surface, and the Needle-less port is a position in the circumferential direction of the edge is unchanged engaging hole ,
An insertion portion that is inserted into the slit of the elastic partition wall member, an engagement arm that faces the insertion portion, and a surface of the engagement arm that faces the insertion portion and fits into the engagement hole A medical connector comprising a medical male connector having an engaging claw to perform,
A guide surface that is inclined at the end edge of at least one side in the circumferential direction of the engagement hole of the needleless port so that the opening width of the engagement hole increases as the distance from the central axis of the needleless port increases. A medical connector characterized in that is formed.   The medical connector according to claim 9, wherein when the engagement claw is fitted into the engagement hole, the engagement claw contacts or faces the guide surface of the engagement hole. When the medical male connector is rotated relative to the needleless port in a state where the medical male connector and the needleless port are connected, the engaging claw slides on the guide surface, The medical connector according to claim 9 or 10, wherein the engaging claw escapes from the engaging hole.   The medical connector according to claim 11, wherein when the engaging claw escapes from the engaging hole, the elastic partition member elastically recovers and the insertion portion is discharged from the slit. The medical connector according to any one of claims 9 to 12, wherein the guide surfaces are provided on both sides in the circumferential direction of the engagement hole. An outer peripheral surface of the needleless port is located in a region between the edge on the medical male connector side and the engagement hole so as to be separated from the central axis of the needleless port as the engagement hole is approached. The medical connector according to any one of claims 9 to 13, wherein an inclined sliding surface is formed. Inclined so that the width dimension of the engaging claw increases toward the at least one side in the circumferential direction centering on the central axis of the insertion portion with respect to the top portion of the engaging claw as the distance from the insertion portion increases. The medical connector according to any one of claims 9 to 14, wherein two guide surfaces are formed. The engagement claw, according to any one of the engaging arm of the second sliding surface billing is formed claim inclined away from the insertion portion toward the tip 9-15 from the top Medical connector. A plurality of the engagement holes are provided at equiangular intervals with respect to the central axis of the needleless port, and the engagement arm provided with the engagement claw is equal to the central axis of the insertion portion. The medical connector according to any one of claims 9 to 16, wherein a plurality of angular intervals are provided.

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