JP2017209149A - Medical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical connector that can easily keep a lock nut clean.SOLUTION: A medical connector includes a cylindrical connector body 101, a lock nut 102 attached to the periphery of the connector body 101 at a mounting position, which can be separated from the connector body 101 by being moved in a tip direction from the mounting position, and a movement regulation part 103 for regulating the movement of the lock nut 102 in an axial direction from the mounting position. The movement regulation part 103 includes a pawl part 125 provided on the lock nut side, and an engagement part 131 provided on the connector body 101 side, which engages with the pawl part 125. The pawl part 125 is provided at an end part of a non-annular flexible piece 123 provided to the lock nut 102, whose end part can be moved in a radial direction. When the position in the radial direction is moved, the engagement with the engagement part 131 is released, and the pawl part can be moved to the tip side of the lock nut 102.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a medical connector, and more particularly to a medical connector that can be used in enteral nutrition.

  Various medical devices such as a syringe, a catheter and a tube are connected by a luer connector. Luer connectors are roughly classified into slip connectors and lock connectors. The slip connector is engaged by friction between the outer peripheral surface of the male connector inserted into the female connector and the inner peripheral surface of the female connector. The lock connector is provided with a lock nut whose inner surface is threaded around the plug of the male connector, and a thread that engages with the screw of the lock nut is provided on the outer peripheral surface of the female connector. The connection reliability can be improved by engaging and locking the lock nut of the male connector with the thread of the female connector or the like. For this reason, the use of a lock connector has become common.

  Even in the enteral nutrition method in which nutrition and medicine are administered to a patient without oral administration, a lock connector is used for connection between a catheter inserted into the patient and a supply container for a liquid substance such as an enteral nutrient. . The connector used for enteral nutrition has adopted a standard in which a female connector is provided at the supply-side downstream end and a patient-side upstream end is a male connector in order to avoid erroneous connection with other lines. For this reason, when separating a male connector and a female connector, there is a high possibility that the male connector is handled as an upward state. If the connector is separated with the male connector facing upward, the overflowing nutrient may flow into the gap between the connector body and the lock nut.

  If the nutrients that have flowed into the gaps are left unattended, miscellaneous bacteria will grow, so it is important to remove the dirt in the gaps. However, it is difficult to completely wipe off the dirt in the narrow gap. For this reason, using the instrument for wash | cleaning the clearance gap between a connector main body and a lock nut is examined (for example, refer patent document 1).

  However, such a cleaning instrument is complicated to handle. When the cleaning tool is attached to the connector, it is necessary to attach it accurately so that the cleaning liquid does not leak. Moreover, in order to wash the sealed space so that liquid leakage does not occur, a complicated operation using two syringes is required. Further, what can be cleaned using such an instrument is a type in which the lock nut is fixed to the connector body, and cannot be used for a connector of a type in which the lock nut rotates freely with respect to the connector body.

  Then, the connector which can isolate | separate a lock nut with respect to a plug is examined (refer patent document 2).

JP2015-188522A No. 04-38149

  However, such a connector is difficult to attach and detach because the lock nut is attached and detached by forcibly moving over the taper portion of the plug surface. Furthermore, the engaging part of a lock nut and a plug may be damaged by repeated use.

  The subject of this indication is enabling it to implement | achieve the medical connector which is easy to remove | release a lock nut from a plug and is easy to maintain a clean state.

  One aspect of the medical connector includes a cylindrical connector body, a lock nut that is attached around the connector body at the mounting position, and that can be separated from the connector body by moving from the mounting position in the distal direction, and mounting of the lock nut A movement restricting portion that restricts movement in the axial direction from the position, and the movement restricting portion includes a claw portion provided on the lock nut side, an engagement portion provided on the connector main body side and engaged with the claw portion. The claw portion is provided at the end of the non-annular tongue piece provided on the lock nut and the end portion of which is movable in the radial direction. The engagement is released and the lock nut can be moved to the tip side.

  One aspect of the medical connector includes a lock nut that is separable from the connector main body by being moved in the distal direction from the mounting position. For this reason, the lock nut can be separated from the connector body and washed or replaced, and the connector can be easily kept clean. In addition, a movement restricting portion having a claw portion provided on the lock nut side and an engagement portion provided on the connector main body and engaged with the claw portion is provided, and unintentional separation from the mounting position hardly occurs. Furthermore, the claw portion is provided at the end portion of the tongue piece which is non-annular and provided in the lock nut and whose end portion is movable in the radial direction, so that the separation operation is easy.

  In one aspect of the medical connector, the movement restricting portion has a claw portion provided on the tongue piece so as to protrude radially inward, and the engaging portion is an engaging convex portion protruding from the connector main body. Is engaged with the surface on the proximal end side of the engaging convex portion, and the surface on the proximal end side of the engaging convex portion can be a vertical surface perpendicular to the axial direction or an inclined surface inclined toward the proximal end side. By adopting such a configuration, unintentional separation of the lock nut can be made difficult to occur.

  In this case, the lock nut has a nut body having a thread groove on the inner surface, and a sheath-like portion that is provided on the proximal side of the nut body and has a diameter smaller than that of the nut body, and the tongue piece has a sheath-like shape. A part of the portion may be cut out. With such a configuration, the structure of the lock nut can be simplified.

  In one aspect of the medical connector, the tongue piece has a pressing portion, and the tongue piece can be configured to move in the radial direction by pressing the pressing portion. By setting it as such a structure, a lock nut can be easily isolate | separated by pressing a press part.

  In this case, the pressing part may have an arm extending from the tongue piece toward the distal end side. With such a configuration, the separation operation becomes easy.

  In one aspect of the medical connector, the lock nut may have a columnar portion protruding outward, and the tongue piece may be connected to the columnar portion. The claw portion can be moved easily and greatly, and secure attachment and separation of the lock nut can be realized.

  In this case, the tongue piece is connected to the columnar portion at the intermediate portion, and the pressing portion can be a portion closer to the tip than the columnar portion of the tongue piece. With such a configuration, the separation operation becomes easy.

  In one aspect of the medical connector, the tongue piece may be configured such that the end portion on the proximal end side moves outward in the radial direction with the portion in contact with the engaging portion as a fulcrum by pressing the pressing portion. . With such a configuration, the configuration can be simplified.

  In one aspect of the medical connector, the movement restricting portion has a claw portion that protrudes radially inward from the tongue piece, and the engaging portion is supported at a distance from the surface of the connector main body. The claw portion engages with the base end side surface of the wall body, and the base end side surface of the wall body is a vertical surface or a tip perpendicular to the axial direction. It can be set as the structure which is an inclined surface inclined to the side. By setting it as such a structure, a lock nut can be easily isolate | separated by pressing a press part.

  In this case, the wall body may be provided in an annular shape so as to surround the connector main body. By setting it as such a structure, a lock nut can be reliably fixed in an attachment position.

  In one aspect of the medical connector, the movement restricting portion has a claw portion provided on the tongue piece so as to protrude radially inward, and the engaging portion is supported by the surface of the connector main body at an interval. The claw portion engages with a base end side surface of the ring body, and the base end side surface of the ring body is a vertical surface perpendicular to the axial direction or an inclined surface inclined to the front end side. can do. With such a configuration, the lock nut can be rotated in the circumferential direction at the mounting position, and the tube can be hardly twisted.

  In one aspect of the medical connector, the lock nut includes a nut main body having a thread groove on the inner surface, a sheath-like portion that is provided on the proximal end side of the nut main body and has a smaller diameter than the nut main body, and a tongue piece May be configured by notching a part of the sheath-like portion.

  In one aspect of the medical connector, the tongue piece has a pressing portion, and the tongue piece can be configured to move in the radial direction by pressing the pressing portion. By setting it as such a structure, a lock nut can be easily isolate | separated by pressing a press part.

  In this case, the pressing portion can be a convex portion that protrudes radially outward from the tongue piece. With such a configuration, the separation operation becomes easy.

  In one aspect of the medical connector, the tongue piece may be pressed by a pressing jig so that the radial position moves. With such a configuration, it becomes easy to limit the persons who can perform the separation operation of the lock nut.

  In one aspect of the medical connector, the lock nut may have a rib provided on the outer peripheral surface and extending in the axial direction. With such a configuration, the lock nut can be easily grasped with a finger.

  According to the medical connector of the present disclosure, it is easy to remove the lock nut from the plug and to keep it clean.

It is a perspective view which shows the medical connector which concerns on one Embodiment. It is sectional drawing in the II-II line of FIG. It is sectional drawing which shows the state which pressed the press part. It is a side view which shows the medical connector which concerns on a 1st modification. It is sectional drawing which shows the medical connector which concerns on a 2nd modification. It is sectional drawing which shows the state which pressed the press part of the medical connector which concerns on a 2nd modification. It is a perspective view which shows the medical connector which concerns on a 3rd modification. It is sectional drawing in the VIII-VIII line of FIG. It is a perspective view which shows the medical connector which concerns on a 4th modification. It is sectional drawing in the XX line of FIG. It is a perspective view which shows the medical connector which concerns on a 5th modification. It is sectional drawing in the XII-XII line | wire of FIG.

  In the following, the side connected to the tube of the connector will be described as the base end side, and the side inserted into the female connector will be described as the front end side. Further, the direction along the passage through which the liquid in the connector flows will be described as the axial direction, and the direction intersecting the axial direction will be described as the radial direction.

  As shown in FIG. 1, the medical connector of this embodiment is a male connector used for enteral nutrition. The medical connector of this embodiment includes a cylindrical connector main body 101 and a lock nut 102, and the lock nut 102 can be separated from the connector main body 101 by moving the lock nut 102 in the distal direction from the mounting position.

  FIG. 2 shows a cross-sectional configuration when the lock nut 102 is in the mounting position. The connector main body 101 is provided on the distal end side, and is provided with a plug 111 inserted into the female connector, a tube connection portion 112 provided on the proximal end side to which the tube is connected, and between the plug 111 and the tube connection portion 112. And an intermediate portion 113 provided. The lock nut 102 includes a nut main body 121 having a thread on the inner surface, a sheath-like portion 122 having a diameter smaller than that of the nut main body 121, and a portion of the sheath-like portion 122. And a tongue piece 123 which is cut out to form a tongue piece shape.

  The intermediate portion 113 of the connector main body 101 is provided with an engaging convex portion 131 that protrudes radially outward from the surface. A claw portion 125 protruding inward in the radial direction is provided at an end portion on the proximal end side of the tongue piece 123. When the lock nut 102 is in the mounting position, the claw portion 125 is located on the proximal end side with respect to the engagement convex portion 131. The inner end portion in the radial direction of the claw portion 125 is located inside the outer end portion in the radial direction of the engagement convex portion 131. For this reason, the nail | claw part 125 and the engagement convex part 131 engage, and the movement control part 103 which controls the movement to the front end side of the lock nut 102 is comprised. In addition, a hook-like portion 115 having an outer diameter larger than the inner diameter of the sheath-like portion 122 is provided between the intermediate portion 113 of the connector main body 101 and the tube connecting portion 112, and is provided to the proximal end side of the lock nut 102. Movement is also restricted. Note that the hook-shaped portion 115 may be provided as necessary, and may not be provided.

  Near the center of the tongue 123, an arm-shaped pressing portion 126 extending to the tip side is connected. As shown in FIG. 3, when the pressing portion 126 is pressed inward, the tongue-like tongue piece 123 moves to the radially outer side at the proximal end with the fixed end on the distal end as a fulcrum. . As a result, the engagement between the claw portion 125 and the engagement convex portion 131 is released, and the lock nut 102 can be moved to the distal end side. The lock nut 102 can be separated from the connector main body 101 by moving the lock nut 102 to the distal end side.

  The base end side surface of the engaging projection 131 is preferably a vertical surface perpendicular to the axial direction or an inclined surface inclined to the base end side. Moreover, it is preferable that the surface on the distal end side of the claw portion 125 is formed at an angle along the surface on the proximal end side of the engaging convex portion 131. By comprising in this way, the nail | claw part 125 can be made hard to remove | deviate from the engagement convex part 131. FIG.

  The connector of the present embodiment presses the arm-shaped pressing portion 126 in the radial direction of the claw portion 125 so that the engagement between the claw portion 125 and the engagement convex portion 131 constituting the movement restricting portion 103 is pressed. It is released by moving the position. As a result, the lock nut 102 can be moved toward the distal end side, and the lock nut 102 can be easily separated from the connector main body 101.

  The connector main body 101 after separating the lock nut 102 can easily wipe off dirt on the surface. The separated lock nut 102 can be easily cleaned. Further, it can be replaced with a new clean lock nut 102 as necessary. Therefore, the medical connector of the present embodiment can be easily kept clean.

  The engaging protrusion 131 can be provided in an annular shape surrounding the connector main body 101. In this way, the lock nut 102 can be rotated once. A slit narrower than the circumferential width of the claw portion 125 may be provided in the engaging convex portion 131. Moreover, it can also be set as the structure by which the engagement convex part 131 was provided only in the part corresponding to the nail | claw part 125. FIG.

  In the present embodiment, the claw portion 125 has a shape in which the end surface on the distal end side is substantially vertical and the end surface on the proximal end side is inclined. By adopting such a configuration, the claw portion 125 can easily get over the engagement convex portion 131 to the proximal end side even if the pressing portion 126 is not pressed, and if the pressing portion 126 is not pressed, the claw It is possible to prevent the portion 125 from easily getting over the engagement convex portion 131 to the tip side. The engagement convex portion 131 has shown an example in which the distal end surface and the proximal end surface are substantially vertical surfaces, but the distal end surface of the engagement convex portion 131 is the proximal end side of the claw portion 125. It can also be set as the surface which has an inclination according to a surface. By setting it as such a structure, even if it does not press the press part 126, the nail | claw part 125 can get over the engagement convex part 131 to the base end side easily. Not only these shapes but also the shapes of the claw portion 125 and the engaging convex portion 131 can be other shapes.

  In the present embodiment, the tongue piece 123 provided with the claw portion 125 is a tongue-like portion formed by cutting out a part of the sheath-like portion 122, and the distal end side is connected to the sheath-like portion 122. The base end side is a free end separated from the sheath-like portion 122. In the present embodiment, an example in which the tongue piece 123 is formed by providing two notched grooves reaching the base end of the sheath-like portion 122 as shown in FIG. The tongue piece 123 can also be formed.

  In the present embodiment, as shown in FIG. 1, a pair of tongue pieces 123 are provided at opposite positions on the circumference. A pair of pressing portions 126 are provided so as to form U-shaped arms that expand on both sides. With such a configuration, the pressing portion 126 can be easily pressed inward in the circumferential direction while being sandwiched between two fingers. Moreover, since the nail | claw part 125 becomes a structure which pinches | interposes the engagement convex part 131 from both sides, it can make it difficult to produce the situation where engagement with the nail | claw part 125 and the engagement convex part 131 is cancelled | released unintentionally. . However, the tongue piece 123 provided with the claw portion 125 may be provided only on one side, and the pressing portion 126 may be provided only on one side.

  Further, as shown in FIG. 2, a protrusion 124 can be provided on the base end portion of the sheath-like portion 122 excluding the tongue piece 123. By adopting such a configuration, in addition to the engagement between the claw portion 125 and the engagement projection 131, the engagement projection 131 and the protrusion 124 engage with each other, so that the connector main body 101 and the lock nut 102 are intended. It is possible to make it difficult to cause a situation of separation without performing the process.

  A protrusion can be provided on the inner surface of the sheath-like portion 122. When the lock nut 102 is in the mounting position, the protrusion on the inner surface of the sheath-like portion 122 is located on the proximal end side with respect to the engagement convex portion 131, and when the lock nut 102 is moved from the mounting position to the distal end side, Get over the engaging protrusion 131. By providing such a protrusion, it is possible to make it difficult for the lock nut 102 to move to the distal end side when the pressing portion is not pressed.

  The pressing portion 126 may be in the form of an arm that extends to the tip side of the fixed portion fixed to the tongue piece 123. With such a configuration, the proximal end of the tongue piece 123 can be moved radially outward by pressing. By changing the length of the arm of the pressing portion 126, the position of the fixing portion, and the like, the pressing force necessary to release the engagement of the claw portion 125 can be adjusted. If the length of the arm is shortened as in the first modification shown in FIG. 4, the force required to release the engagement of the claw portion 125 can be increased. Conversely, if the length of the arm is increased, the force required to release the engagement of the claw portion 125 can be reduced. Further, when the lock nut 102 is tightened, an advantage that the arm does not easily get in the way can be obtained.

  Moreover, the press part 126 will not be restricted to an arm shape, if the base part side part in which the nail | claw part 125 in the tongue piece 123 was provided can be pressed so that it may move to radial direction outer side. For example, as in the second modified example shown in FIG. 5, a protruding pressing portion 126 protruding outward in the radial direction can be provided at the center of the tongue piece 123. By pressing the pressing portion 126 inward in the radial direction, the tongue piece 123 is bent with a portion that contacts the engaging convex portion 131 as a fulcrum as shown in FIG. 6, and the claw portion 125 can be moved outward in the radial direction. it can.

  Although the example which uses the tongue piece 123 comprised by notching a part of sheath-like part 122 was shown, the columnar part protruded to the radial direction outer side from the lock nut 102 like the 3rd modification shown in FIG.7 and FIG.8. It is also possible to use a tongue piece 123 </ b> A made of a plate connected to 128. In this case, the intermediate portion of the tongue piece 123A can be connected to the columnar portion 128, the claw portion 125 can be provided at the proximal end portion, and the distal end portion of the columnar portion 128 can be the pressing portion 126. By pressing the pressing portion 126, the tongue piece 123A moves outward in the radial direction with the portion connected to the columnar portion 128 as a fulcrum, so that the base end side end provided with the claw portion 125 is outward in the radial direction. Moving.

  By setting it as such a structure, when the press part 126 is pressed, the displacement of the nail | claw part 125 can be enlarged. As a result, a malfunction in which the engagement between the claw portion 125 and the engagement convex portion 131 is released even though the pressing portion 126 is not pressed, or a relationship with the claw portion 125 regardless of whether the pressing portion 126 is pressed. It is possible to make it difficult to cause a malfunction that does not release the engagement with the mating convex portion 131.

  The tongue piece is not limited to these configurations, and may have any configuration as long as it is non-annular and the end portion can be moved in the radial direction.

  In the above embodiment and modification, the movement restriction that releases the engagement between the claw portion and the engaging portion by moving the proximal end portion provided with the claw portion of the tongue piece radially outward. An example of the part was shown. However, it can also be set as the movement control part of the structure by which engagement with an engaging part is cancelled | released when a nail | claw part moves to radial inside. In this case, the engaging portion can be provided at a distance from the surface of the connector main body so as to engage with the claw portion.

  For example, when the pressing portion is not pressed, the inner end portion in the radial direction is inside the outer end portion in the radial direction of the claw portion, and a member that engages with the claw portion is used as an engaging portion around the connector body. Can be provided. Specifically, as in the fourth modification shown in FIGS. 9 and 10, the engaging portion is provided so as to face the surface of the connector body 101 at a distance from the surface of the connector body 101. It can be set as the wall 133 which has the hole 133a. When the claw portion 125 provided at the proximal end of the tongue piece 123 engages with the engagement hole 133a provided in the wall 133, the movement of the lock nut 102 in the axial direction is restricted. By pressing a pressing portion 126 provided at the center of the tongue piece 123 so as to protrude radially outward, the claw portion 125 provided at the proximal end of the tongue piece 123 moves radially inward. . Thereby, the engagement between the claw portion 125 and the engagement hole 133a is released, and the lock nut 102 can be moved to the distal end side. Since the outer end portion in the radial direction of the claw portion 125 is located outside the outer peripheral surface of the wall body 133, it is possible to make it difficult to disengage.

  9 and 10, the wall body 133 is provided in an annular shape so as to surround the connector main body 101. In addition, the proximal end side is supported by a hook-shaped portion 115 provided between the intermediate portion 113 of the connector main body 101 and the tube connecting portion 112. By setting it as such a structure, the intensity | strength of the wall 133 can be ensured. However, the support part that supports the wall body 133 may not be the hook-shaped part 115, and for example, the wall body 133 can be supported by a plurality of pillars protruding radially from the connector main body 101. Further, the wall 133 does not need to surround the connector main body 101, and can be provided only in a portion that engages with the claw portion 125.

  The base end surface of the wall 133 is preferably a vertical surface perpendicular to the axial direction or an inclined surface inclined toward the distal end side. Moreover, it is preferable that the surface on the distal end side of the claw portion 125 is formed at an angle along the surface on the proximal end side of the wall body 133. By comprising in this way, the nail | claw part 125 can be made hard to remove | deviate from the wall body 133. FIG.

  The claw portion 125 has a shape in which the end surface on the distal end side is substantially vertical and the end surface on the proximal end side is inclined. With such a configuration, the claw portion 125 can be easily fitted into the engagement hole 133a even when the pressing portion 126 is not pressed. Further, if the pressing portion 126 is not pressed, the claw portion 125 can be prevented from being easily removed from the engaging hole 133a. As shown in FIG. 8, the end surface of the wall 133 on the front end side is inclined according to the inclination of the claw portion 125, so that the claw portion 125 is easily fitted into the engagement hole 133a. However, the shape of the claw portion and the wall body may be other shapes.

  The engagement hole 133a provided in the wall body 133 may have a size that allows the claw portion 125 to be fitted therein. In addition, although the example in which the engagement hole 133a is an opening that penetrates the wall body 133 is shown, the engagement hole 133a may not penetrate the wall body 133. In the fourth modification, an example in which four engagement holes 133a are provided has been described, but the number of the claw portions 125 may be the same. As in the fourth modification, two claw portions 125 are provided at opposite positions on the circumference, and the engagement holes 133a are shifted by 90 ° and provided at four locations, so that the lock nut 102 is 90 ° at the mounting position. It can be rotated one by one. Thereby, when connecting with a female connector, the twist of a tube etc. can be made hard to produce. Further, in the third modified example, a protrusion is provided at a position shifted by 90 ° from the claw portion 125 so as to engage with the engagement hole 133 a that is not engaged with the claw portion 125. Thereby, the lock nut 102 can be more stably held at the mounting position. In addition, the number of the engagement holes and the angle of the interval at which the engagement holes are provided are not particularly limited.

  Further, as shown in FIG. 10, a protrusion 124 can be provided on the base end portion of the sheath-like portion 122 excluding the tongue piece 123. By adopting such a configuration, in addition to the engagement between the claw portion 125 and the engagement hole 133a, the wall body 133 and the projection 124 are engaged, so that the connector body 101 and the lock nut 102 are unintentionally separated. It can be made difficult to occur.

  The engagement hole can also be lengthened in the circumferential direction. In this way, the lock nut 102 can be rotated in the circumferential direction at the mounting position. Thereby, when connecting with a female connector, the twist of a tube etc. can be made hard to produce.

  The engaging portion may be a ring that is supported at a distance from the surface of the connector main body 101 in place of the wall provided with the engaging hole. For example, in the fifth modification shown in FIGS. 11 and 12, the ring body 136 is supported by the two columns 137 at a distance from the surface of the connector main body 101. In this case, the claw portion 125 can freely rotate between the two columns 137. For this reason, when connecting with a female connector, the twist of a tube etc. can be made hard to produce.

  In the fifth modification, the tongue piece 123 provided with the claw portion 125 protrudes from the sheath portion 122 toward the proximal end side. For this reason, at the mounting position, the end surface on the distal end side of the claw portion 125 is in contact with the end surface on the proximal end side of the ring body 136, and the proximal end of the sheath-like portion 122 is in contact with the end surface on the distal end side of the column 137. Thereby, the movement to the front end side and the base end side of the lock nut 102 is controlled.

  Moreover, as shown in FIG. 12, the base end of the sheath-like part 122 may be provided in the taper shape which is diameter-reduced in the base end direction. With this configuration, the sheath portion 122 can be easily inserted into the gap between the outer peripheral surface of the connector main body 101 and the ring body 136, and the proximal end of the sheath portion 122 is the end surface on the distal end side of the column 137. It can be made easy to come into contact with.

  Also in the fifth modified example, the claw portion 125 has a shape in which the end surface on the distal end side is substantially vertical and the end surface on the proximal end side is inclined, and can easily move to the proximal end side, If the pressing portion 126 is not pressed, the movement is difficult. Also in the fourth modification, the end surface on the tip side of the ring body 136 can be inclined according to the inclination of the claw portion 125.

  The base end side surface of the ring body 136 is preferably a vertical surface perpendicular to the axial direction or an inclined surface inclined toward the base end side. Moreover, it is preferable that the surface on the distal end side of the claw portion 125 is formed at an angle along the surface on the proximal end side of the ring body 136. By comprising in this way, the nail | claw part 125 can be made hard to remove | deviate from the ring body 136. FIG.

  In the fifth modification, the two pillars 137 support the ring body 136 from the base end side. However, it is sufficient that the ring body 136 can be supported, and the ring body 136 is supported from the front end side, or a column 137 is provided between the ring body 136 and the connector main body 101 to support the ring body 136 from below. It can also be done. Further, the number of pillars 137 may be one, or three or more. Further, the ring body 136 may not be supported by the column 137 rising from the connector main body 101 but may be supported by a connecting convex portion extending from the flange-shaped portion 115 provided on the proximal end side to the distal end side. Since the outer end portion in the radial direction of the claw portion 125 is located outside the outer peripheral surface of the ring body 136, it is possible to make it difficult to disengage the engagement.

  In the 2nd modification, the example in which the press part 126 which protruded on the radial direction outer side was provided was shown. In the fourth modification and the fifth modification, the pressing portion 126 protrudes from the tongue piece 123 and is a convex portion higher than the nut main body 121. By doing in this way, it becomes easy to press the press part 126, and removal | release of the lock nut 102 becomes easy. However, conversely, it is possible to make it difficult for the lock nut 102 to be detached unintentionally by making it difficult to press the pressing portion. Furthermore, it is also possible to limit the detachment of the lock nut so that only the person holding the pressing jig can perform it so that the tongue piece cannot be pressed without using a dedicated pressing jig. For example, a convex portion is provided around the tongue piece of the sheath-like portion so that the pressing portion of the tongue piece is located in the concave portion, and the pressing portion provided on the tongue piece is not used unless a pressing jig with a protruding pin is used. It is possible to prevent pressing. Moreover, it can also be set as the structure which makes the press part the same as a nail | claw part, presses directly the nail | claw part engaged with the engaging part with a jig | tool, and cancels engagement with a nail | claw part and an engaging part. .

  In the embodiment and each modification, a rib 127 extending in the axial direction is provided on the outer peripheral surface of the nut main body 121. By providing the rib 127, it is possible to make it difficult to slip when the lock nut 102 is rotated. The number and position of the ribs 127 are not particularly limited. Moreover, it can replace with the rib 127 and can provide the structure of another slipper.

  In the embodiment and each modified example, the movement restricting portion has a pressing portion, and by pressing the pressing portion, the end portion on the proximal end side of the tongue piece is moved in the radial direction, so that the claw portion and the engaging portion The configuration for releasing the engagement has been described. However, it is good also as a structure which cancels | releases engagement with a nail | claw part and an engaging part by methods other than the press of a press part. For example, the engagement between the claw portion and the engagement portion may be released by adjusting the engagement force between the claw portion and the engagement portion and pulling the lock connector toward the distal end side.

  Although the connector of embodiment and each modification is not specifically limited, It is preferable to form with the semi-rigid or hard material which satisfy | fills ISO specification. Specifically, polyethylene, polypropylene, polyvinyl chloride, polycarbonate resin, acrylic-butadiene-styrene (ABS) resin, or the like can be used.

  Although the connector of this embodiment and each modification can be used in enteral nutrition, it is not limited to this, and can also be used as a connector in other applications.

  The connector of the present disclosure can be easily detached from the plug and can easily keep the lock nut clean, and is useful as a medical connector or the like.

DESCRIPTION OF SYMBOLS 101 Connector main body 102 Lock nut 103 Movement control part 111 Plug 112 Tube connection part 113 Middle part 115 Nail-shaped part 121 Nut main body 122 Sheath-like part 123 Tongue piece 123A Tongue piece 124 Projection 125 Claw part 126 Press part 127 Rib 128 Columnar part 131 Engagement convex part 133 Wall body 133a Engagement hole 136 Ring body 137 Column

Claims (16)

A cylindrical connector body;
A lock nut attached around the connector body at the mounting position and separable from the connector body by moving in the distal direction from the mounting position;
A movement restricting portion for restricting movement of the lock nut in the axial direction from the mounting position;
The movement restricting portion has a radially movable tongue piece provided on the lock nut, and an engagement portion provided on the connector main body side and engaged with the tongue piece,
A medical connector in which the engagement with the engaging portion is released by moving the position of the tongue piece in the radial direction, and the lock nut can be moved to the distal end side. The movement restricting portion has a claw portion provided on the tongue piece so as to protrude radially inward,
The engaging part is an engaging convex part protruding from the surface of the connector body,
The claw portion engages with a surface on the proximal end side of the engagement convex portion,
2. The medical connector according to claim 1, wherein a surface on the proximal end side of the engagement convex portion is a vertical surface perpendicular to the axial direction or an inclined surface inclined toward the proximal end side. The lock nut has a nut body having a thread groove on the inner surface, and a sheath-shaped portion provided on a proximal end side than the nut body and having a smaller diameter than the nut body,
The said tongue piece is a medical connector of Claim 1 or 2 comprised by notching a part of said sheath-shaped part. The tongue has a pressing portion;
By pressing the pressing part, the tongue piece moves in the radial direction.
The medical connector according to claim 1.   The medical connector according to claim 4, wherein the pressing portion includes an arm extending from the tongue piece toward a distal end side. The lock nut has a columnar portion protruding outward,
The medical connector according to claim 4, wherein the tongue piece is connected to the columnar part. The tongue piece is connected to the columnar part at an intermediate part,
The medical connector according to claim 6, wherein the pressing portion is a portion on the distal end side of the columnar portion in the tongue piece.   5. The medical connector according to claim 4, wherein the tongue piece moves radially outward at a base end side by pressing the pressing portion with a portion in contact with the engaging portion as a fulcrum. . The movement restricting portion has a claw portion provided on the tongue piece so as to protrude radially inward,
The engagement portion is a wall body that is supported at a distance from the surface of the connector body and has an engagement hole that engages with the claw portion,
The claw portion is engaged with a surface on the base end side of the wall body,
2. The medical connector according to claim 1, wherein the surface on the proximal end side of the wall body is a vertical surface perpendicular to the axial direction or an inclined surface inclined toward the distal end side.   The medical connector according to claim 9, wherein the wall body is provided in an annular shape so as to surround the connector main body. The movement restricting portion has a claw portion provided on the tongue piece so as to protrude radially outward,
The engagement portion is an annulus that is supported at a distance from the surface of the connector body,
The claw portion engages with a base end side surface of the ring body,
2. The medical connector according to claim 1, wherein a surface on a proximal end side of the ring body is a vertical surface perpendicular to an axial direction or an inclined surface inclined toward a distal end side. The lock nut has a nut body having a thread groove on the inner surface, and a sheath-shaped portion provided on a proximal end side than the nut body and having a smaller diameter than the nut body,
The medical connector according to any one of claims 9 to 11, wherein the tongue piece is configured by cutting out a part of the sheath-like portion. The tongue has a pressing portion;
By pressing the pressing portion, the claw portion moves radially inward,
The medical connector according to any one of claims 9 to 12.   The medical connector according to claim 13, wherein the pressing portion is a convex portion provided to protrude radially outward from the tongue piece.   The medical connector according to claim 1, wherein the tongue piece is pressed by a pressing jig and moves in a radial direction.   The medical connector according to claim 1, wherein the lock nut has a rib provided on an outer peripheral surface and extending in an axial direction.