JP2017051566A - Medical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical connector whose elastic valve body is hard to fall while securing strength of a housing.SOLUTION: A medical connector 100 is provided with a housing part 101 and an elastic valve body 102 fixed to the housing part 101 so as to close an insertion port 111. A cylindrical part 131 has: an upper side projection 141 provided on the reverse surface of an upper end surface and projects downward; and a lower side projection 142 which is provided at a position facing the upper side projection 141 and projects upward. An annular recess 124 of the elastic valve body 102 is sandwiched between the upper side projection 141 and the lower side projection 142. An outer diameter of the cylindrical part 131 is larger the lower it goes between an upper end of an annular rib part 123 and an upper end of the lower side projection 142; an outer diameter of the annular rib part 123 is larger the lower it goes between the upper end of the annular rib part 123 and the upper end of the lower side projection 142.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to medical connectors.

  By providing a connector in a fluid flow path for infusion, blood collection, etc., it becomes possible to mix and inject chemicals. As a medical connector used for such an application, for example, a needleless connector having a structure in which a disc-shaped elastic valve body called a split septum is attached to an opening of a housing is known (see, for example, Patent Document 1). .)

  The male connector can be connected to the fluid flow path by directly inserting the distal end portion of the male connector into the slit of the elastic valve body and pushing the slit open. Moreover, if the front-end | tip part of the connected male connector is extracted from a valve body, an opening part can be returned to a obstruction | occlusion state by the restoring action of an elastic valve body.

  However, in the medical connector as in Patent Document 1, when the male connector is pushed into the elastic valve body, the elastic valve body may drop from the housing. Therefore, the applicant has attempted improvement in terms of improving the locking portion of the valve (see, for example, Patent Document 2). However, further improvements are required.

JP 2009-011820 A JP 2010-148757 A

  The subject of this indication is enabling it to realize a medical connector from which an elastic valve body is hard to drop off.

  A first aspect of the medical connector includes a housing portion having a hook-shaped portion, a cylindrical portion protruding from the hook-shaped portion and provided with an insertion port into which a male connector is inserted on an upper end surface, and the insertion port is closed. And an elastic valve body fixed to the housing portion, and the cylindrical portion is provided on the back surface of the upper end surface and protrudes downward, and is provided at a position facing the upper convex portion. The elastic valve body is exposed from the insertion port and provided with a slit, an annular rib provided outside the center, and a central portion and an annular rib. Between the upper convex portion and the lower convex portion, and has an annular concave portion. The outer diameter of the cylindrical portion is the upper end of the annular rib portion and the upper end of the lower convex portion. The outer diameter of the annular rib portion is between the upper end of the annular rib portion and the upper end of the lower convex portion. Toward the lower side large.

  By setting it as such a structure, the outer diameter of a valve body can be enlarged, without reducing the intensity | strength of a cylindrical part. That is, the volume of the annular rib portion around the lower convex portion can be increased while ensuring the thickness of the cylindrical portion. Thereby, the situation where an annular rib part passes between a lower side convex part and an upper side convex part can be reduced, and it can be made hard to produce omission of an elastic valve body at the time of insertion of a male connector.

  In the first aspect of the medical connector, the cylindrical portion is provided with a first portion that is reduced in diameter so that the outer diameter gradually decreases toward the upper side, and is provided above the first portion. A second portion having a smaller diameter reduction ratio than the portion, and the boundary between the first portion and the second portion may be located above the upper end of the lower convex portion.

  In this way, when the male connector is inserted, the second portion serves as a guide for the coupler. Therefore, even when the male connector is inserted from an oblique direction, the male connector can be guided in the correct direction.

  In the first aspect of the medical connector, the diameter reduction rate of the second portion may be zero. That is, the outer diameter of the second portion can be constant. By making the outer diameter of the second portion constant, the function of the second portion as a guide can be further enhanced.

  In the first aspect of the medical connector, the tubular portion may have a thread, and the thread may be provided on the outer surface of the tubular portion. The cylindrical portion can be reinforced by providing the screw thread.

  In the first aspect of the medical connector, the length of the portion provided with the screw thread may be 3.0 mm or more.

  In the first aspect of the medical connector, when the luer lock male connector with a coupler conforming to the ISO standard is inserted into the insertion port, the insertion distance of the luer lock male connector with the coupler is limited to 4.2 mm or less. You may have an insertion distance restriction | limiting part. By providing the insertion distance limiting portion, the male connector can be prevented from being inserted more than necessary, and the elastic valve body can be made more difficult to drop off.

  In the first aspect of the medical connector, the insertion distance limiting portion can be a hook-shaped portion that comes into contact with the coupler end surface of the luer lock male connector with a coupler. With such a configuration, the insertion distance can be optimized between a connector with a coupler and a connector without a coupler.

  The second aspect of the medical connector includes a housing portion having a hook-like portion, a cylindrical portion protruding from the hook-like portion and provided with an insertion port into which the male connector is inserted on the upper end surface, and the insertion port is closed. And an elastic valve body fixed to the housing portion, and the cylindrical portion is provided on the back surface of the upper end surface and protrudes downward, and is provided at a position facing the upper convex portion. The elastic valve body is exposed from the insertion port and provided with a slit, an annular rib provided outside the center, and a central portion and an annular rib. Between the upper convex portion and the lower convex portion and having an annular concave portion, and the outer diameter of the cylindrical portion is the upper end of the annular rib portion and the lower convex portion. Between the upper end and a position below the predetermined distance, the lower side is larger, and the outer diameter of the annular rib portion is lower than the upper end of the annular rib portion. Large as the lower side in between the upper end of the convex portion and the position of a predetermined distance lower, predetermined distance is the distance from the lower end of the upper protrusion to the upper end of the lower projection.

  A third aspect of the medical connector includes a housing portion having a hook-like portion, a cylindrical portion protruding from the hook-like portion and provided with an insertion port into which a male connector is inserted on the upper end surface, and the insertion port is closed. And an elastic valve body fixed to the housing portion, and the cylindrical portion is provided on the back surface of the upper end surface and protrudes downward, and is provided at a position facing the upper convex portion. The elastic valve body is exposed from the insertion port and provided with a slit, an annular rib provided outside the center, and a central portion and an annular rib. Between the upper convex portion and the lower convex portion and having an annular concave portion, and the outer diameter of the cylindrical portion is the upper end of the annular rib portion and the lower convex portion. Between the upper end and a position a predetermined distance below the upper end, the lower side is larger, and the outer diameter of the annular rib portion is the upper end of the annular rib portion, Toward the lower side between the position of a predetermined distance lower from the upper end of the side protrusions increases, the predetermined distance is the distance between the upper end of the lower end of the upper protrusion and the annular rib.

  According to a fourth aspect of the medical connector, the third aspect of the medical connector includes a hook-shaped portion, a cylindrical portion that protrudes from the hook-shaped portion, and is provided with an insertion port into which the male connector is inserted at the upper end surface. And an elastic valve body fixed to the housing portion so as to close the insertion port. The cylindrical portion is provided on the back surface of the upper end surface and protrudes downward. The elastic valve body is provided at a position opposite to the portion and protrudes upward, and the elastic valve body is provided at a center portion exposed from the insertion port and provided with a slit, and at an outer side than the center portion. An annular rib portion, and an annular recess portion provided between the central portion and the annular rib portion and sandwiched between the upper convex portion and the lower convex portion, and between the upper end and the lower end of the annular rib portion. The outer diameter of the cylindrical portion is larger on the lower side, and the outer diameter of the annular rib portion is larger on the lower side.

  According to the medical connector of the present disclosure, it is possible to realize a medical connector in which the elastic valve body is difficult to drop off.

It is a perspective view which shows the medical connector which concerns on one Embodiment. It is sectional drawing which shows the medical connector which concerns on one Embodiment. It is sectional drawing which expands and shows the upper part of the cylindrical part of the medical connector which concerns on one Embodiment. It is sectional drawing which shows the state which inserted the male connector in the medical connector which concerns on one Embodiment.

  Although the direction at the time of using the medical connector of this embodiment is not limited, Below, the state arrange | positioned with the insertion port where a male connector is inserted upwards is demonstrated.

  As shown in FIGS. 1 and 2, the medical connector 100 of this embodiment is a mixed injection plug into which a standard male luer connector such as a syringe can be inserted. Specifically, it has a housing part 101 having an insertion port 111 into which a male connector is inserted, and an elastic valve body 102 fixed to the housing part 101 so as to close the insertion port 111.

  In the present embodiment, the upper part 101A of the housing part 101 is a female connector into which a male connector is inserted, and protrudes upward from the hook-like part 132 and the hook-like part 132, and the insertion port 111 is provided in the upper end surface 134. And a cylindrical portion 131. An upper part 101 </ b> A of the housing part 101 is formed by an outer cylinder member 151 and an inner cylinder member 152 provided inside the outer cylinder member 151. The lower part 101 </ b> B of the housing part 101 is formed by a lower member 153 connected to the lower end parts of the outer cylinder member 151 and the inner cylinder member 152. Lower part 101B should just be the composition which can be connected to a fluid channel, for example, can be made into a male connector.

  On the back surface of the upper end surface 134 of the cylindrical portion 131, an upper convex portion 141 that protrudes downward is provided. The upper end portion of the inner cylinder member 152 is located at a position facing the upper convex portion 141 and is a lower convex portion 142 protruding upward.

  The elastic valve body 102 is exposed from the insertion port 111 and has a central part 121 provided with a slit 121a, an annular rib part 123 provided outside the central part 121, and a gap between the central part 121 and the annular rib part 123. And an annular recess 124 provided on the surface. The annular rib portion 123 is inserted into a hollow portion formed between the outer cylindrical member 151 and the inner cylindrical member 152, and the annular concave portion 124 is sandwiched between the upper convex portion 141 and the lower convex portion 142. Yes. In the present embodiment, the elastic valve body 102 is such that the upper end of the annular rib portion 123 is at a position lower than the upper surface of the central portion 121, and the lower end protrudes greatly below the lower surface of the central portion 121. It has become. However, a configuration in which the hook-shaped portion 125 is not provided may be employed. In this case, the housing shape can be, for example, as described in JP-A-2009-011820.

  In the medical connector 100 of the present embodiment, a thread 137 that engages with the coupler of the male connector is provided on the outer periphery of the cylindrical portion 131 so that a luer lock male connector with a coupler can be inserted. Hereinafter, the outer diameter of the cylindrical portion 131 will be described. In this case, the outer diameter is an outer diameter of a portion excluding the screw thread 137.

  FIG. 3 shows the upper portion of the cylindrical portion 131 in an enlarged manner. In the present embodiment, in the elastic valve body 102, the annular rib portion 123 is inserted into the hollow portion between the outer cylindrical member 151 and the inner cylindrical member 152, and the annular concave portion 124 includes the upper convex portion 141 and the lower convex portion 142. By being sandwiched between the two, the housing portion 101 is fixed. When the male connector is inserted into the insertion port 111, the male connector expands and pushes down the central portion 121 of the elastic valve body 102. At this time, a force pulling downward with the lower convex portion 142 as a fulcrum also acts on the annular rib portion 123. If the force pulling the annular rib 123 downward exceeds the limit, and the upper end of the annular rib 123 passes through the narrow part between the upper convex part 141 and the lower convex part 142, the elastic valve body 102 is take off. For this reason, in order to make it difficult for the elastic valve body 102 to drop off when the male connector is inserted, it is preferable to increase the volume of the annular rib portion 123 as much as possible, and in particular, the annular rib portion around the lower convex portion 142. It is preferable to increase the volume of 123 as much as possible.

  The volume of the annular rib portion 123 around the lower convex portion 142 is determined by parameters such as the outer diameter of the cylindrical portion 131, the diameter of the insertion port 111, and the vertical position of the lower convex portion 142. The upper and lower limits of these parameters are largely limited by the size of the male connector to be inserted, and there is almost no design freedom. Further, although the volume can be increased by reducing the thickness of the outer cylinder member 151, the thickness of the outer cylinder member 151 is limited in terms of strength. For example, the lower limit of the thickness of the outer cylinder member 151 is the material Although it depends, it is about 0.15 mm.

  Further, the outer diameter of the cylindrical portion 131 is also limited from the viewpoint of operability. In order to increase the volume of the annular rib portion 123, it is preferable that the outer diameter of the cylindrical portion 131 is close to the upper limit value. However, the coupler of the male connector to be inserted and the cylindrical portion 131 can be easily engaged. In order to do so, it is preferable that the outer diameter of at least the upper end of the cylindrical portion 131 be as close as possible to the lower limit. On the other hand, it is preferable that the outer diameter of the lower end part of the cylindrical part 131 is as close as possible to the upper limit from the viewpoint of making it difficult to loosen the coupler of the inserted male connector.

  The center value of the thread diameter of the coupler of the male connector defined in ISO (594-2) is 7.0 mm, and the upper limit of the outer diameter of the female connector corresponding to this is about 6.9 mm. On the other hand, the standard for the lower limit of the outer diameter of the female connector is 6.63 mm. Accordingly, when the connector conforms to ISO, the outer diameter of the lower end portion of the cylindrical portion 131 is preferably about 6.9 mm, and the outer diameter of the upper end portion is preferably about 6.6 mm.

  For this reason, it is preferable that the outer diameter of the cylindrical portion 131 is increased at the lower end portion and decreased at the upper end portion. From the viewpoint of increasing the volume of the annular rib portion 123 around the lower convex portion 142 in the annular rib portion 123, the portion having the small outer diameter of the cylindrical portion 131 is preferably as high as possible. It is preferable that it is located above the upper end of.

  In the present embodiment, the cylindrical portion 131 is provided with a first portion 161 that decreases in diameter upward from the flange-shaped portion 132 and the outer diameter gradually decreases, and is provided above the first portion 161. And a second portion 162 that is constant and equal to the upper end of the first portion 161. The boundary between the first portion 161 and the second portion 162 is located above the upper end of the lower convex portion 142. The lower end of the portion having the smallest outer diameter of the cylindrical portion 131 becomes the lower end of the second portion 162. For this reason, the portion having the smallest outer diameter of the cylindrical portion 131 is not located below the upper end of the lower convex portion 142 and is located above the upper end of the lower convex portion 142. Yes. Further, the outer diameter of the cylindrical portion 131 and the outer diameter of the annular rib portion 123 are larger toward the lower side between the upper end of the annular rib portion 123 and the upper end of the lower convex portion 142.

  With such a configuration, when the thickness of the outer cylinder member 151 is the same, the length of the second portion 162 is long, and the boundary between the first portion 161 and the second portion 162 is the lower convex portion. Compared with the case where it is located below the upper end of 142, the volume of the annular rib part 123 around the lower convex part 142 can be enlarged. When a luer lock male connector with a standard coupler according to ISO (594-2) can be inserted, and the outer diameter of the upper end of the cylindrical portion 131 is 6.9 mm, the second portion 162 is made as short as possible. Then, the boundary between the first portion 161 and the second portion 162 is positioned above the upper end of the lower convex portion 142, thereby being positioned 1 mm below the upper end of the lower convex portion. The volume of the annular rib portion around the lower convex portion 142 can be increased by about 30% at the maximum as compared with the case where it is.

  In the present embodiment, the outer diameter of the second portion 162 is constant, but the second portion 162 may be reduced in diameter so that the outer diameter gradually decreases toward the upper end. In this case, the outer diameter reduction ratio of the second portion 162 is preferably smaller than the outer diameter reduction ratio of the first portion 161. When the diameter of the second portion 162 is reduced, the portion having the smallest outer diameter of the tubular portion 131 becomes the upper end of the tubular portion 131.

  FIG. 3 shows an example in which the diameter reduction rate of the first portion 161 is constant and a clear boundary is recognized between the first portion 161 and the second portion 162. However, the diameter reduction ratio of the first portion 161 gradually decreases in the vicinity of the boundary with the second portion 162, so that the first portion 161 can smoothly transition to the second portion 162. Even in this case, the outer diameter of the second portion 162 can be gradually reduced.

  In addition, the first portion 161 and the second portion 162 are not separated, and the outer diameter gradually decreases from the lower end to the upper end of the cylindrical portion 131. In this case, the portion having the smallest outer diameter of the tubular portion 131 is the upper end of the tubular portion 131. The diameter reduction rate of the cylindrical portion 131 can be constant from the lower end to the upper end. Moreover, it can also be set as the structure which changes so that a diameter reduction rate may become small gradually. However, by providing the second portion 162 having a smaller diameter reduction ratio than the first portion 161, an advantage that the male connector can be easily inserted in the vertical direction can be obtained. For example, by reducing the diameter reduction ratio of the second portion 162 to be smaller than that of the first portion 161 and making the inclination of the side surface of the second portion 162 closer to perpendicular to the first portion 161, the male connector Even when it is inserted from an oblique direction, the inner surface of the coupler is guided by the outer surface of the second portion 162, so that it is easy to insert in the vertical direction. From the viewpoint of increasing the effect of guiding the coupler, it is preferable to make the outer diameter of the second portion 162 constant and to make the inclination of the side surface of the second portion 162 vertical.

  In any configuration, the portion having the smallest outer diameter of the cylindrical portion 131 does not exist below the upper end of the lower convex portion 142. The lowermost convex portion is secured while ensuring the thickness of the outer cylindrical member 151 because the lowermost end of the portion having the smallest outer diameter of the cylindrical portion 131 is positioned above the upper end of the lower convex portion 142. The volume of the annular rib portion 123 around 142 can be increased. From the viewpoint of ease of molding, the second portion 162 having the same outer diameter and the same outer diameter as the upper end of the first portion 161 is formed on the first portion 161 having a constant diameter reduction rate. A configuration in which the boundary between the first portion 161 and the second portion 162 is located above the upper end of the lower convex portion 142 is preferable.

  In the present embodiment, the example in which the portion with the smallest outer diameter of the cylindrical portion 131 is located above the upper end of the lower convex portion 142 is shown. However, the outer diameter and the annular shape of the cylindrical portion 131 are shown. If the outer diameter of the rib portion 123 increases toward the lower side between the upper end of the annular rib portion 123 and the upper end of the lower convex portion 142, the volume around the lower convex portion 142 of the annular rib portion 123 is increased to the upper side. The volume around the convex portion 141 can be made larger. Further, if the outer diameter of the cylindrical portion 131 is larger on the lower side between the upper end and the lower end of the annular rib portion 123, and the outer diameter of the annular rib portion 123 is larger on the lower side, the lower convex portion 142. An effect of increasing the volume of the peripheral annular rib portion 123 is obtained.

  In addition, not only the case where it becomes large with the uniform diameter expansion rate from the upper side to the lower side, but the case where a diameter expansion rate changes in the middle is also included that it becomes large toward the lower side. Moreover, it can also be set as the structure where the part from which the diameter expansion rate became 0 exists. Furthermore, it can also be set as the structure which has the level | step difference.

  Further, the portion of the cylindrical portion 131 having the smallest outer diameter can be positioned slightly above the position below the upper end of the lower convex portion 142. In this way, the volume of the annular rib portion 123 around the lower convex portion 142 can be increased. Specifically, the portion having the smallest outer diameter of the cylindrical portion 131 can be positioned above the lower surface of the central portion 121. In addition, the portion of the cylindrical portion 131 having the smallest outer diameter may be located above the lower position by a predetermined distance from the upper end of the lower convex portion 142. The predetermined distance in this case is a distance between the lower end of the upper convex portion 141 and the upper end of the annular rib portion 123. In addition, the predetermined distance may be a distance from the lower end of the upper convex portion 141 to the upper end of the lower convex portion 142. However, since the lowermost end of the portion having the smallest outer diameter of the cylindrical portion 131 is located above the upper end of the lower convex portion 142, the volume of the annular rib portion 123 around the lower convex portion 142 is reduced. Can be bigger. In addition, when the part where the outer diameter of the cylindrical part 131 is the minimum is located above the lower position by a predetermined distance from the upper end of the lower convex part 142, the outer diameter of the cylindrical part 131 and The outer diameter of the annular rib portion 123 increases toward the lower side between the upper end of the annular rib portion 123 and the lower position by a predetermined distance from the upper end of the lower convex portion 142.

  Preferably, the maximum thickness of the annular rib portion 123 around the lower convex portion 142 is made thicker than the maximum thickness of the annular convex portion 123 around the upper convex portion 141, and the lower convex portion 142 of the annular rib portion 123. What is necessary is just to make the volume of a periphery larger than the volume of the upper convex part 141 periphery. The maximum thickness of the annular rib portion 123 is the maximum value of the thickness of the annular rib portion 123 in the radial direction of the elastic valve body 102.

  In the present embodiment, a cavity reaching the lower part 101B of the housing part 101 is provided between the outer cylinder member 151 and the inner cylinder member 152, and the annular rib part 123 has a bowl shape so as to fill this cavity. It spreads downward. By increasing the volume of the portion of the annular rib portion 123 below the lower convex portion 142, an effect of making it difficult for the elastic valve body 102 to drop off due to insertion and extraction of the male connector can be obtained. However, it can also be set as the structure where the part below the lower side convex part 142 in the cyclic | annular rib part 123 has not expanded in the hook shape.

  In the present embodiment, the screw thread 137 is continuously provided in a spiral shape from the upper end portion to the lower end portion of the cylindrical portion 131. The portion of the outer cylinder member 151 where the screw thread 137 is provided is thicker than the portion where the screw thread 137 is not provided. For this reason, the outer cylinder member 151 can be reinforced with the screw thread 137, and the wall thickness of the outer cylinder member 151 can be designed thinner than the case where the screw thread 137 is not provided. The reinforcement effect can be increased by providing the thread 137 continuously from the upper end to the lower end of the cylindrical portion. However, the screw thread 137 may not be provided continuously.

  In the case of a luer lock connector with a standard coupler conforming to ISO, the length of the portion provided with the screw thread 137 in the cylindrical portion 131 is 3.0 mm or more from the viewpoint of ensuring the locking. Preferably there is. The thread 137 is preferably provided from the top of the cylindrical portion 131 as much as possible, and more preferably from the upper end. When the coupler and the thread 137 are engaged by the same length, the position where the male connector is inserted can be made shallower if the thread 137 is provided as close as possible to the upper end of the cylindrical portion. Thereby, the force which pushes down the elastic valve body 102 can be made small, and the elastic valve body 102 can be made more difficult to drop off.

  The medical connector of this embodiment can also be made into the structure which has the insertion distance restriction | limiting part which restrict | limits the insertion distance of a male connector from a viewpoint which makes the elastic valve body 102 hard to drop off. By providing the insertion distance limiting portion to prevent the male connector from being inserted deeper than necessary, the load applied to the elastic valve body 102 can be reduced and can be made difficult to drop off. When the male connector is a male luer lock connector with a standard coupler compliant with ISO, the insertion distance is preferably limited to 4.2 mm or less from the viewpoint of preventing the elastic valve body 102 from dropping off. Further, from the viewpoint of preventing the male connector from falling off, the insertion distance is preferably about 3.0 mm or more, and more preferably about 3.5 mm or more.

  The insertion distance limiting portion 171 may have any configuration as long as the insertion distance of the male connector 201 can be limited. For example, as shown in FIG. 4, the insertion distance limiting portion 171 is formed by a hook-shaped portion 132 and an end face of the coupler 202 of the male connector 201. be able to. The insertion of the male connector 201 is restricted by the contact between the hook-shaped portion 132 and the end face of the coupler 202. In the case where the distal end of the male connector 201 is an insertion distance limiting portion configured to come into contact with a member in the housing portion 101, the insertion distance of the connector without the coupler is also limited to the same as the connector with the coupler. However, since a connector without a coupler is easier to disconnect than a connector with a coupler, it is preferable to make the insertion distance longer than a connector with a coupler. For this reason, the insertion distance is set in accordance with a connector having no coupler.

  In the configuration shown in FIG. 4, the insertion distance of the connector with the coupler 202 is limited by the insertion distance limiting portion 171, but in the case of a connector without the coupler 202, the tip of the connector is formed by the lower member 153. It can be inserted until it touches the step. For this reason, an insertion distance can be restrict | limited exactly according to the kind of male connector. The insertion distance limiting unit only needs to be able to limit the insertion distance depending on the relationship with the coupler. For example, the insertion distance of the male connector can be limited by the position and shape of the screw thread 137.

  The housing portion 101 can be formed using a thermoplastic resin such as polypropylene, polyethylene, polycarbonate, polystyrene, or polyacetal from the viewpoint of securely holding the elastic valve body 102. The materials of the outer cylinder member 151, the inner cylinder member 152, and the lower member 153 of the housing portion 101 may be the same or different.

  The lower member 153 of the housing part 101 can be a male connector, for example. Not only this but what kind of composition connected to a fluid channel can also be considered. For example, the lower member 153 can be a stopcock or an infusion tube.

  The elastic valve body 102 can be formed of an elastic material. For example, materials such as synthetic rubber such as isoprene rubber or silicone rubber, natural rubber, or thermoplastic elastomer can be used from the viewpoint of airtightness and resealability. For molding, press molding, mold molding, or the like can be used. The slit 121a can be, for example, linear, Y-shaped or cross-shaped. The slit 121a can be formed by penetrating a sharp blade in the thickness direction of the molded elastic valve body 102. In the present embodiment, an example in which the central portion 121 of the elastic valve body 102 is a flat surface is shown, but the central portion 121 of the elastic valve body 102 may be a curved surface.

  In the present embodiment, an example in which the male connector to be inserted is a standard male luer connector has been shown, but a configuration in which another connector is inserted may be employed. In this case, the size of each member can be changed according to the male connector to be inserted.

  The medical connector of the present disclosure is useful as a medical connector or the like because the elastic valve body is difficult to drop off.

DESCRIPTION OF SYMBOLS 100 Medical connector 101 Housing part 101A Upper part 101B Lower part 102 Elastic valve body 111 Insertion port 121 Center part 121a Slit 123 Annular rib part 124 Annular recessed part 125 Gutter part 131 Cylindrical part 132 Girder part 134 Upper end surface 137 Thread 141 Upper side Convex part 142 Convex part 151 Outer cylinder member 152 Inner cylinder member 153 Lower member 161 First part 162 Second part 171 Insertion distance limiting part 201 Male connector 202 Coupler

Claims (10)

A housing portion having a hook-shaped portion and a cylindrical portion provided with an insertion port that protrudes from the hook-shaped portion and into which a male connector is inserted on the upper end surface;
An elastic valve body fixed to the housing portion so as to close the insertion port,
The cylindrical portion includes an upper convex portion provided on the back surface of the upper end surface and protruding downward, and a lower convex portion provided at a position facing the upper convex portion and protruding upward.
The elastic valve body is provided between a central portion exposed from the insertion port and provided with a slit, an annular rib portion provided outside the central portion, and the central portion and the annular rib portion. And having an annular recess when sandwiched between the upper convex portion and the lower convex portion,
The outer diameter of the cylindrical part is larger toward the lower side between the upper end of the annular rib part and the upper end of the lower convex part,
A medical connector in which an outer diameter of the annular rib portion is larger toward a lower side between an upper end of the annular rib portion and an upper end of the lower convex portion. The cylindrical portion is provided with a first portion that is reduced in diameter so that the outer diameter gradually decreases toward the upper side, and an upper side than the first portion, and the diameter reduction rate is higher than that of the first portion. A small second part,
The medical connector according to claim 1, wherein a boundary between the first portion and the second portion is located above an upper end of the lower convex portion.   The medical connector according to claim 2, wherein the second portion has a constant outer diameter.   The medical connector according to any one of claims 1 to 3, wherein the cylindrical portion has a screw thread, and the screw thread is provided on an outer surface of the cylindrical portion.   The medical connector according to claim 4, wherein a length of the portion provided with the screw thread is 3.0 mm or more.   An insertion distance limiting portion that restricts an insertion distance of the luer lock male connector with a coupler to 4.2 mm or less when a luer lock male connector with a coupler conforming to the ISO standard is inserted into the insertion port; Item 6. The medical connector according to any one of Items 1 to 5.   The medical connector according to claim 6, wherein the insertion distance limiting portion is the hook-shaped portion that comes into contact with a coupler end surface of the luer lock male connector with the coupler. A housing portion having a hook-shaped portion and a cylindrical portion provided with an insertion port that protrudes from the hook-shaped portion and into which a male connector is inserted on the upper end surface;
An elastic valve body fixed to the housing portion so as to close the insertion port,
The cylindrical portion includes an upper convex portion provided on the back surface of the upper end surface and protruding downward, and a lower convex portion provided at a position facing the upper convex portion and protruding upward.
The elastic valve body is provided between a central portion exposed from the insertion port and provided with a slit, an annular rib portion provided outside the central portion, and the central portion and the annular rib portion. And having an annular recess when sandwiched between the upper convex portion and the lower convex portion,
The outer diameter of the cylindrical part is larger toward the lower side between the upper end of the annular rib part and a position a predetermined distance below the upper end of the lower convex part,
The outer diameter of the annular rib portion is larger toward the lower side between the upper end of the annular rib portion and a position a predetermined distance below the upper end of the lower convex portion,
The said predetermined distance is a medical connector which is a distance from the lower end of the said upper side convex part to the upper end of the said lower side convex part. A housing portion having a hook-shaped portion and a cylindrical portion provided with an insertion port that protrudes from the hook-shaped portion and into which a male connector is inserted on the upper end surface;
An elastic valve body fixed to the housing portion so as to close the insertion port,
The cylindrical portion includes an upper convex portion provided on the back surface of the upper end surface and protruding downward, and a lower convex portion provided at a position facing the upper convex portion and protruding upward.
The elastic valve body is provided between a central portion exposed from the insertion port and provided with a slit, an annular rib portion provided outside the central portion, and the central portion and the annular rib portion. And having an annular recess when sandwiched between the upper convex portion and the lower convex portion,
The outer diameter of the cylindrical part is larger toward the lower side between the upper end of the annular rib part and a position a predetermined distance below the upper end of the lower convex part,
The outer diameter of the annular rib portion is larger toward the lower side between the upper end of the annular rib portion and a position a predetermined distance below the upper end of the lower convex portion,
The said predetermined distance is a medical connector which is a distance between the lower end of the said upper side convex part, and the upper end of the said annular rib part. A housing portion having a hook-shaped portion and a cylindrical portion provided with an insertion port that protrudes from the hook-shaped portion and into which a male connector is inserted on the upper end surface;
An elastic valve body fixed to the housing portion so as to close the insertion port,
The cylindrical portion includes an upper convex portion provided on the back surface of the upper end surface and protruding downward, and a lower convex portion provided at a position facing the upper convex portion and protruding upward.
The elastic valve body is provided between a central portion exposed from the insertion port and provided with a slit, an annular rib portion provided outside the central portion, and the central portion and the annular rib portion. And having an annular recess when sandwiched between the upper convex portion and the lower convex portion,
Between the upper end and the lower end of the annular rib portion, the outer diameter of the cylindrical portion is larger toward the lower side,
The outer diameter of the annular rib portion is a medical connector that is larger toward the lower side.

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