JP6718153B2 - Medical valve - Google Patents

Description

The present invention relates to a medical valve that is used for a fluid flow path in the medical field such as an infusion route and can connect a medical connector (male connector) such as a syringe to the fluid flow path.

In the medical field, a fluid valve for infusion or blood collection uses a medical valve to connect a male connector such as a syringe as needed. For example, in a three-way stopcock or a Y-shaped connector that is a type of fluid flow path forming member, a fluid flow path is formed between a pair of flow path openings, and a medical valve is provided in the remaining one flow path opening. It is installed. Then, a male connector such as a syringe can be connected to the fluid flow path via the medical valve, so that mixed injection of a drug solution can be performed.

By the way, as a kind of such a medical valve, a split septum type medical valve described in Patent Document 1 or Patent Document 2 is known. This medical valve has a structure in which a disc-shaped elastic valve body having a slit formed in a central portion is attached to an opening member that constitutes an opening portion of a fluid flow path. By directly inserting the tip of the male connector into the slit of the elastic valve body, the male connector can be connected to the fluid flow path in a communicating state. Further, by pulling out the tip end of the male connector such as the syringe connected in this way from the elastic valve body, at the same time as the pulling out, the restoring action of the elastic valve body holds the fluid flow path in a blocked state. ..

Further, in a split septum type medical valve, it is necessary to firmly fix the elastic valve body to the opening of the opening member so that the elastic valve body does not come off when the male connector is attached or detached. Therefore, in the related art, as shown in Patent Documents 1 and 2, a pair of claw-shaped annular locking projections provided on the opening member sandwiches the outer peripheral portion of the elastic valve body from both sides in the thickness direction. The structure supported by is adopted.

Japanese Patent Publication No. 2-502976 JP, 2004-237133, A

The inventor of the present application, "a medical valve in which a male connector can be repeatedly inserted into and removed from a slit formed in a central portion of a disk-shaped elastic valve body", has a slit formed in a central portion of the disk-shaped elastic valve body. In the medical valve in which the male connector can be repeatedly inserted and removed, in addition to firmly supporting the outer peripheral portion of the elastic valve body so that the elastic valve body does not fall off from the opening member when the male connector is inserted and removed, , Has newly found that there are unique challenges.
That is, in the disk-shaped elastic valve body having the conventional structure, "the outer peripheral portion of the elastic valve body is firmly supported with respect to the housing to prevent it from falling off" and "improvement in operability when inserting the male connector" The problem was that it was difficult to achieve both at the same time.

In the present invention according to claim 1, an annular constricted portion is provided by forming annular grooves extending in the circumferential direction on both the inner and outer surfaces of the outer peripheral portion, and the outer peripheral side of the constricted portion is the annular fixing portion. And a slit is formed in the center , and a male connector is provided with a disk-shaped elastic valve body that can be repeatedly inserted into and removed from the slit, which is arranged at the opening of the fluid flow path. A medical valve in which the elastic valve body is held at the opening of the fluid flow path by engaging the locking projections with the annular grooves formed on the inner and outer surfaces of the elastic valve body, respectively. The tip end of the locking projection abuts against the annular groove on the inner surface of the elastic valve body and is locked, and the concave groove portion extending in the circumferential direction on the inner peripheral side of the locking projection is the elastic valve body. Is formed so as to open toward the inner surface of the male connector, and elastic deformation of the inner surface shape of the concave groove portion is allowed when the male connector is inserted into the slit, while the male connector is It is designed to be inserted through the slit, and the outer surface of the central portion is brought into contact with the outer peripheral surface of the male connector when the male connector is inserted through the slit. The characteristic medical valve is a structural feature.
Further, in the present invention, for example, the following first to third aspects can be appropriately adopted individually or in combination.
That is, the first aspect that can be adopted together in the present invention is that, in the inserted state in which the male connector penetrates the slit, the inner surface of the central portion of the elastic valve body is the inner periphery of the opening portion of the fluid flow path. This is a mode in which the surface is abutted .
Also, a second aspect which may be employed in conjunction with the present invention, the engaging than the formation position of the stop projection and the cylindrical portion is provided extending inwardly, inserting said male connector penetrates said slit In this state, the inner peripheral surface of the cylindrical portion, which is elastically deformed and positioned downward in the state, is wider than the inner peripheral surface of the locking projection.
A third aspect that can be adopted together in the present invention is that the female thread of the luer lock connector as the male connector is screwed into the tubular portion extending inward from the opening portion where the elastic valve body is mounted. In this embodiment, a male screw is formed on the outer peripheral surface.
For reference, the structural features in each claim of the parent application of the present case will be described below.
The present invention according to claim 1 of the parent application provides a substantially disk-shaped central portion, a substantially circular annular fixing portion that surrounds the outer periphery of the central portion over the entire circumference, the central portion and the annular shape. While having the respective annular grooves on the inner and outer surfaces formed between the fixed part and the fixed part, a slit is formed in the central part, and the male connector is arranged at the opening of the fluid flow path and the male connector has the slit. A substantially disk-shaped elastic valve body that can be repeatedly inserted into and removed from the elastic valve body, and the inner and outer surfaces provided in the opening of the fluid flow path with respect to the annular grooves formed on both inner and outer surfaces of the elastic valve body. Of the elastic valve body is inserted into the annular groove of the inside and the outside of the elastic valve body, so that the elastic valve body is inserted into the opening portion of the fluid flow path. A retained medical valve, wherein the protruding tip of the locking projection is abutted against the annular groove on the inner surface of the elastic valve body and is locked, and the annular shape is formed on the inner surface of the elastic valve body. On the inner peripheral side of the groove, a concave groove portion facing the outer peripheral surface of the inner surface of the central portion is provided, while in the annular groove formed on the inner surface of the elastic valve body, the protruding tip of the locking projection portion. Is located above the groove bottom surface of the recessed groove portion, which is the outer surface side of the elastic valve body, and by inserting the male connector into the slit, the inner surface of the central portion is Is characterized in that the medical valve is capable of contacting the inner peripheral surface of the opening of the fluid flow path.
In the present invention as set forth in claim 2 of the parent application, an annular constricted portion is provided by opposing annular grooves extending in the circumferential direction on both inner and outer surfaces of the outer peripheral portion, and the outer peripheral side of the constricted portion is annular. While being a fixed part, a slit is formed in the central part, and a substantially disk-shaped elastic valve body is provided which is arranged in the opening part of the fluid flow path and allows the male connector to be repeatedly inserted into and removed from the slit. At the same time, the inner and outer locking projections provided at the opening of the fluid flow path are inserted into the respective annular grooves formed on both the inner and outer surfaces of the elastic valve body, and the inner and outer locking projections are inserted. Is a medical valve in which the elastic valve body is held in the opening of the fluid flow path by locking the constricted portion, and the protrusion of the locking projection is formed on the inner surface of the elastic valve body. The tip end is locked by hitting the annular groove, and a concave groove portion facing the outer peripheral surface of the inner surface of the central portion is provided on the inner peripheral side of the annular groove formed on the inner surface of the elastic valve body. On the other hand, in the annular groove formed on the inner surface of the elastic valve body, the groove bottom surface with which the protruding tip of the locking projection abuts is on the outer surface side of the elastic valve body with respect to the groove bottom surface of the recessed groove portion. A medical valve which is located above and in which the inner surface of the central portion can be brought into contact with the inner peripheral surface of the opening portion of the fluid passage by inserting the male connector into the slit. Is a structural feature.
According to the invention of claim 3 of the parent application, an annular constricted portion is provided by opposing annular grooves extending in the circumferential direction on the inner and outer surfaces of the outer peripheral portion, and the outer peripheral side of the constricted portion is annular. While being a fixed part, a slit is formed in the central part, and a substantially disk-shaped elastic valve body is provided which is arranged in the opening part of the fluid flow path and allows the male connector to be repeatedly inserted into and removed from the slit. At the same time, the inner and outer locking projections provided at the opening of the fluid flow path are inserted into the respective annular grooves formed on both the inner and outer surfaces of the elastic valve body, and the inner and outer locking projections are inserted. Is a medical valve in which the elastic valve body is held in the opening of the fluid flow path by locking the constricted portion, and the protrusion of the locking projection is formed on the inner surface of the elastic valve body. The tip end is locked by hitting the annular groove, and a concave groove portion facing the outer peripheral surface of the inner surface of the central portion is provided on the inner peripheral side of the annular groove formed on the inner surface of the elastic valve body. On the other hand, in the annular groove formed on the inner surface of the elastic valve body, the groove bottom surface with which the protruding tip of the locking projection abuts is on the outer surface side of the elastic valve body with respect to the groove bottom surface of the recessed groove portion. Since the outer peripheral surface of the central portion is located 2 mm or more away from the center on the inner surface of the elastic valve body and the male connector is inserted into the slit, the inner surface of the central portion is located above. A medical valve that can be brought into contact with the inner peripheral surface of the opening of the fluid channel is a structural feature.
The present invention according to claim 4 of the parent application is the elastic valve body, wherein the constricted portion is formed at a position closer to the inner surface in the thickness direction of the central portion. A medical valve is a structural feature.
The present invention according to claim 5 of the parent application provides the medical valve according to any one of claims 1 to 4, wherein the thickness of the central portion of the elastic valve body is 1 to 3 mm. , The characteristic of the configuration.
The present invention according to claim 6 of the parent application provides the medical valve according to any one of claims 1 to 5, wherein the elastic valve body has a diameter of 5 to 6.5 mm. Characterize.
In the present invention according to claim 7 of the parent application, a valve seat which projects inward in the radial direction is formed in an opening portion of the fluid flow path, and an inner peripheral edge portion of the valve seat is provided with: The medical device according to any one of claims 1 to 6, wherein the locking projection is formed so as to project outward and is locked to the annular groove formed on the inner surface of the elastic valve body. The valve is a structural feature.
The present invention according to claim 8 of the parent application, the central portion of the elastic valve body, the protrusion height inward and outward from each groove bottom surface of the annular groove formed on the inner and outer surfaces are different, 8. The thickness from the groove bottom surface of the annular groove on the outer surface side is thicker than the thickness from the groove bottom surface of the annular groove on the inner surface side of the central portion. The medical valve described in 1. is a structural feature.
The present invention according to claim 9 of the parent application is any one of claims 1 to 8 in which the outer peripheral surface of the central portion of the elastic valve body is smaller on the inner surface side than on the outer surface side of the elastic valve body. The medical valve according to any one of the above 1 to 3 is characterized by its construction.
The present invention according to claim 10 of the parent application is such that when the male connector is inserted into the slit of the elastic valve body, the luer tip of the male connector is held only by the elastic valve body, and The medical valve according to any one of claims 1 to 9, which is not in contact with the inner peripheral surface of the opening portion of the passage, has a structural feature.
In the present invention according to claim 11 of the parent application, a cylindrical wall portion extending inward from a position where the locking projection is formed is provided at an opening portion of the fluid flow path, and the male connector is provided with the slit. The inner peripheral surface of the cylindrical wall portion into which the elastic valve body is deformed and inserted by being inserted into the cover is wider than the inner peripheral surface of the locking projection. The medical valve described is a structural feature.
In the present invention according to claim 12 of the parent application, when the male connector is inserted into the slit, the inner surface of the recessed groove portion of the elastic valve body comes into contact with the inner peripheral surface of the locking projection portion to form a gap. The medical valve according to any one of claims 1 to 11, characterized in that the occurrence of the above is prevented.
According to a thirteenth aspect of the present invention in the parent application, the annular fixing portion of the elastic valve body has a substantially rectangular cross-sectional shape in which a length dimension in the axial direction is larger than a thickness dimension in the radial direction. 13. The axially upper end surface of the annular fixing portion is axially inwardly lower than the axial upper end surface of the central portion while extending continuously in the direction. The medical valve described is a structural feature.
The present invention according to claim 14 of the parent application is characterized in that a male screw portion to which a female screw portion of a luer lock connector as the male connector is screwed is formed on an outer peripheral surface of an opening portion of the fluid passage. The medical valve according to any one of 1 to 13 is characterized in terms of configuration.

[Operation and effect of the present invention]
In the medical valve having the structure according to the present invention, the elastic valve body is supported by the annular groove and the locking projection formed on both inner and outer surfaces of the disk-shaped elastic valve body, and the concave groove portion is inserted into the slit of the male connector. The stress generated in the valve member due to the bending deformation during insertion can be reduced.

[Other aspects and effects of the present invention]
In the present invention having the above-mentioned structural features, it is possible to employ any of the following aspects in an appropriate combination as needed.

Further, in the present invention, the opening member is provided with the cylindrical wall portion extending inward of the fluid flow path from the position where the locking projection is formed, and by inserting the male connector into the slit of the elastic valve body, the elastic member is elastic. The inner surface located on the inner peripheral side of the annular groove of the valve body and positioned apart from the inner peripheral surface of the opening member is changed from the inner peripheral surface of the locking projection of the opening member to the inner peripheral surface of the cylindrical wall portion. A configuration adapted to abut and overlap the area extending over can be adopted. According to such a configuration, for example, when the tip end of the syringe is inserted into the elastic valve body and connected to the fluid flow path, the insertion end position of the syringe tip is abutted (engaged) with the opening member. Instead of being regulated, the elastic valve body may be sandwiched between the tubular wall portion of the opening member and the cylindrical wall portion, and may be regulated in a compressed state. Thereby, for example, the tip portion of the male connector can be stably held via the elastic valve body, and the reliability of the connection state of the male connector to the fluid flow path can be improved. Moreover, since a large compressive force is reliably exerted on the elastic valve body when the male connector is connected, the stability and reliability of the sealing performance of the elastic valve body can be improved.

The perspective view of the medical connector as one embodiment of the present invention. The front view of the medical connector. The perspective view of the mixed injection port provided in the medical connector. Sectional drawing of the mixed injection port. The top view of the annular ring which comprises the mixed injection port. The side view of the annular ring. The bottom view of the annular ring. The perspective view of the annular ring. IX-IX sectional drawing in FIG. XX sectional drawing in FIG. FIG. 4 is an enlarged cross-sectional view of a main part of the mixed injection port shown in FIG. 3. The disassembled perspective view of the mixed injection port. Sectional model drawing for demonstrating the manufacturing method of the same mixed injection port. Sectional model drawing for demonstrating the connection method of the same mixed injection port. It is a perspective view of a medical connector as another embodiment of the present invention, (a) shows a mixed injection plug, and (b) shows a T-shaped mixed injection tube, respectively.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show a three-way stopcock 10 as a medical connector having a medical valve according to an embodiment of the present invention. The three-way stopcock 10 has a structure in which a holder 12 as a housing body and a cock 14 as a flow path switching mechanism are attached to the holder 12. In the following description, the up-down direction refers to the up-down direction in FIG. 2 unless otherwise specified.

The holder 12 is an integrally molded product having a hollow structure including a main body 16 having a substantially cylindrical shape and three first to third branch pipes 18, 20, 22 protruding from the outer periphery of the main body 16. .. Each of the first to third branch pipes 18, 20, and 22 has a tubular shape with both axial end portions open, and one axial end portion is connected to the main body portion 16 so that the inside of the main body portion 16 is connected. While being communicated with the space, the other end is a first to third branch opening 24, 26, 28 which is modeled by a dotted line in FIG. 2 and communicates with the external space of the holder 12. .. Thereby, the internal flow paths connected to the first to third branch openings 24, 26, 28 are formed by the internal spaces of the first to third branch pipes 18, 20, 22 respectively. Further, the first branch pipe 18 and the second branch pipe 20 are formed on the outer circumference of the main body 16 at opposite positions. On the other hand, the third branch pipe 22 is formed on the outer periphery of the main body 16 at a position where the first branch pipe 18 and the second branch pipe 20 are equidistantly arranged at 90 degrees.

In the three-way stopcock 10 shown in FIGS. 1 and 2, a female luer cap 30 having an internal thread formed on the inner peripheral surface thereof is detachably fixed to the first branch opening 24 in an externally mounted state. ing. In addition, a lock adapter 32 having an internal thread formed on the inner peripheral surface thereof is fixed to the second branch pipe 20 by a flange-shaped portion (not shown) formed on the second branch pipe 20 so as not to slip out, and is externally inserted. It is installed in the state. Further, a male luer cap 34 is detachably attached to the second branch opening 26 in an externally attached state.

The cock 14 is inserted into the main body 16 and is rotatable and liquid-tightly assembled. By rotating the cock 14, the insides formed by the internal spaces of the first to third branch pipes 18, 20, 22 and opened at the first to third branch opening portions 24, 26, 28. It is possible to selectively connect the flow paths.

Further, the third branch opening 28 is provided with a mixed injection port 36 as a medical valve. 3 and 4 show the detailed structure of the mixed injection port 36. The mixed injection port 36 includes a valve member 38 as a disc-shaped elastic valve body, a tubular mouth 40 as a tubular portion, and an annular ring 42. The tubular mouth 40 and the annular ring 42 are provided. The valve member 38 is sandwiched between 42 and assembled. In the present embodiment, the opening member to which the valve member 38 is assembled is configured to include the tubular mouth 40 and the annular ring 42.

The valve member 38 has a substantially disk-shaped overall shape in which a central portion 44 having a substantially disc shape and an annular fixing portion 46 having a substantially annular shape surrounding the outer circumference of the central portion 44 over the entire circumference are integrally formed. Has been done. The valve member 38 is formed of an elastic material, and in consideration of airtightness and resealability, a material selected from synthetic rubber such as isoprene rubber and silicone rubber, natural rubber, and thermoplastic elastomer is used. It is formed by press molding or molding.

Then, the central portion 44 is formed with a slit 48 penetrating in the thickness direction. Here, as the shape of the slit 48, for example, a linear shape or a cross shape is adopted. In the present embodiment, the central portion 44 passes through the center of the central portion 44 and does not reach the outer peripheral edge portion of the central portion 44. Has a linear shape extending in the radial direction. The slit 48 is formed by penetrating a sharp blade in the thickness direction of the molded valve member 38.

On the other hand, the annular fixing portion 46 has a constant substantially rectangular cross-sectional shape and extends continuously in the circumferential direction. This rectangular cross section has a larger axial dimension (vertical dimension in FIG. 4) than a radial dimension (horizontal dimension in FIG. 4). The axial dimension of the annular fixing portion 46 is smaller than the axial dimension of the central portion 44, and the axial upper end surface of the annular fixing portion 46 is inward from the axial upper end surface of the central portion 44 (Fig. 4 lower). This prevents the annular ring 42 from protruding outward from the axially upper end surface of the central portion 44 when the annular ring 42 is superposed and assembled axially above the annular fixing portion 46.

Further, annular grooves 54 and 56 having a concave cross section and continuously extending over the entire circumference are formed on the outer peripheral portions of the inner surface 50 and the outer surface 52 of the valve member 38, respectively. The annular grooves 54 and 56 are formed at substantially equal positions in the radial direction of the valve member 38, and the valve member 38 has an annular constricted portion whose thickness dimension is reduced by the annular grooves 54 and 56. 58 is formed. Therefore, in the valve member 38 in the present embodiment, the central portion 44 is formed on the inner peripheral side of the constricted portion 58, while the annular fixing portion 46 is formed on the outer peripheral side of the constricted portion 58, and the central portion 44 is formed. And the annular fixing portion 46 are connected by a constricted portion 58 to form an integrally molded product. The constricted portion 58 is formed at a position slightly closer to the inner surface 50 in the thickness direction of the valve member 38, and the central portion 44 of the valve member 38 is closer to the outer surface 52 side than the constricted portion 58 than the inner surface 50 side. Is also thick.

Further, a concave groove portion 60 that continuously extends over the entire circumference is formed inside the annular groove 54 on the inner surface 50. In short, the wall surface on the inner peripheral side of the annular groove 54 is formed by the concave groove portion 60. The concave groove portion 60 has a constant cross-sectional shape of a curved concave shape and extends over the entire circumference in the circumferential direction, and opens inward in the axial direction of the valve member 38 (downward in FIG. 4 ). (See Figure 11).

The diameter of the valve member 38 is preferably set within the range of 5.0 to 6.5 mm. As shown in FIG. 14, which will be described later, when the diameter of the valve member 38 is smaller than 5.0 mm, it becomes difficult to insert the luer tip 106 of the standard luer lock connector 104 having an outer diameter unified to about 4.0 mm. On the other hand, if the diameter is larger than 6.5 mm, the outer diameter of the third branch opening 28 becomes large, and it becomes difficult to connect the female thread 108 of the standard luer lock connector 104.

The thickness dimension of the valve member 38 is preferably set within the range of 1.0 to 3.0 mm. If the thickness dimension of the valve member 38 is smaller than 1.0 mm, the sealing performance at the time of inserting the male connector such as the syringe tip portion may be insufficient, while if the thickness dimension is larger than 3.0 mm. This is because the insertion resistance of the male connector may increase and the insertion operation may become difficult.

Such a valve member 38 is supported by a tubular mouth 40 as an opening member formed separately from the holder 12. The tubular mouth body 40 has a stepped cylindrical shape in which a large diameter tubular portion 62 and a small diameter tubular portion 64 are integrally formed. The inner diameter of the small-diameter cylindrical portion 64 is set to a size capable of accommodating the valve member 38 at least on the side of the opening 65 (upper side in FIG. 4), and the re-sealing state of the slit 48 after the male connector is removed is stably exhibited. As such, it is preferably substantially equal to the outer diameter dimension of the valve member 38.

The tubular mouth 40 is preferably formed of a material having a strength capable of reliably holding the valve member 38, and specifically, a thermoplastic resin such as polypropylene, polyethylene, polycarbonate, polystyrene, or polyacetal is exemplified. To be done. Then, the tubular mouth body 40 is molded from these materials by injection molding or the like.

An annular projecting seat 68 as a valve seat that projects inward in the radial direction is integrally formed on the inner peripheral edge of the opening 65 of the small-diameter cylindrical portion 64. A locking projection 70 is integrally formed to project outward in the opening direction of the small-diameter cylindrical portion 64 (upward in FIG. 4 ). The locking projection 70 has a circumferential wall shape that is continuous over the entire circumference with a constant projection height dimension.

Here, since the concave groove portion 60 is formed on the inner surface 50 of the valve member 38, the portion from the inner peripheral surface of the locking projection 70 to the inner peripheral surface of the annular projection seat 68 is in close contact with the valve member 38. It is not exposed and is exposed in the internal space of the tubular mouth 40 that forms the fluid flow path. Moreover, this exposed surface corresponds to the concave groove portion 60 of the curved concave cross section formed in the valve member 38, and has an abutting inner peripheral surface 71 that extends over the entire circumference in the curved convex constant cross-sectional shape. It is said that.

In the small-diameter cylindrical portion 64, the inner surface of the peripheral wall located axially inward of the protruding portion of the locking projection 70 has a cylindrical surface 73 that linearly extends inward in the axial direction with a substantially constant inner diameter. Has been done.

Then, as will be described later, when the distal end portion of the syringe or the like is inserted into the valve member 38, the concave groove portion 60 of the valve member 38 elastically deformed inward of the tubular mouth body 40 is engaged. The stop projection 70 and the annular projection seat 68 contact the contact inner peripheral surface 71, and the inner surface 50 of the central portion 44 thereof contacts the cylindrical surface 73 of the small-diameter cylindrical portion 64. There is. At that time, the mutually abutting surfaces are set to have shapes corresponding to each other, so that the abutting surfaces are stably abutted in a close contact state with no gap. ..

The protrusion height of the locking projection 70 is equal to or slightly larger than the groove depth of the annular groove 54 formed on the inner surface 50 of the valve member 38 from the inner surface of the annular fixing portion 46. Is preferred. As a result, a gap is prevented from being formed between the protruding tip of the locking protrusion 70 and the groove bottom of the annular groove 54 of the valve member 38.

Further, the annular projection seat 68 and the locking projection 70 form an annular fitting groove 72 extending over the entire circumference in the inner peripheral surface of the small-diameter cylindrical portion 64. The fitting concave groove 72 is open toward the opening direction on the small diameter tubular portion 64 side of the tubular mouth 40. The depth dimension of the fitting concave groove 72 is the protrusion height dimension of the locking projection 70 described above, and is equal to or slightly larger than the depth dimension of the annular groove 54 of the valve member 38. Further, the radial groove width dimension of the fitting concave groove 72 is the same as or slightly the same as the width dimension of the portion of the annular fixing portion 46 of the valve member 38 that projects axially inward (inner surface side) from the constricted portion 58. Has been made smaller. As a result, the annular fixing portion 46 of the valve member 38 is brought into close contact with the entire inner surface of the fitting concave groove 72 to prevent a gap in the fitting concave groove 72.

Further, on the outer peripheral surface of the small diameter cylindrical portion 64, a male screw portion 74 with which a female screw portion 108 of a luer lock connector 104 described later is screwed is formed. The male screw portion 74 is preferably a female screw portion of a luer lock connector, which is defined by ISO 594, in which the crest diameter of the screw is set to 7.0±0.2 mm and the root diameter of the screw is set to 8.0±0.1 mm. It is a double thread screw that can be connected.

The outer diameter of the tubular mouth 40 has a small diameter when the male screw portion 74 is not formed as in the present embodiment in order to enable connection of a standard luer tip defined by ISO594. The outer diameter of the portion 64 is preferably set within the range of 6.0 to 7.0 mm, and when the male screw portion 74 is formed as in the present embodiment, the small-diameter cylindrical portion 64 including the thread is formed. The outer diameter is preferably set within the range of 7.2 to 8.0 mm.

Further, the annular ring 42 is fixed to the opening portion 65 of the small diameter tubular portion 64 of the tubular mouth 40. 5 to 10 show the annular ring 42 alone. The annular ring 42 has a substantially annular shape with a through hole 75 formed in the center, and the outer diameter dimension thereof is substantially equal to the inner diameter dimension of the opening portion 65 in the small-diameter tubular portion 64, while the inner diameter dimension thereof. Is approximately equal to the diameter of the central portion 44 of the valve member 38. As the material of the annular ring 42, the same thermoplastic resin as that of the tubular mouth 40 described above is preferably used.

In addition, an annular notch 77 that is continuous over the entire circumference is formed on the outer peripheral portion of the upper end surface 76 of the annular ring 42. On the other hand, on the inner peripheral portion of the lower end surface 78 of the annular ring 42, a locking projection 80 that projects downward is integrally formed. In particular, the locking projection 80 in the present embodiment is divided in the circumferential direction by a plurality of (in the present embodiment, eight) locking projections 81 having a substantially rectangular cross-sectional shape and extending partially in the circumferential direction. It has a plurality of protruding shapes. Further, particularly in the present embodiment, all of the plurality of locking projections 81 are formed to have substantially the same shape, and are formed at substantially equal intervals in the circumferential direction of the annular ring 42.

Here, the radial width dimension of the protruding end surface 82 of the locking projection 81 is the same as or slightly larger than the radial width dimension of the bottom surface of the annular groove 56 formed on the outer surface 52 of the valve member 38, and The projecting height of the stop projection 81 from the lower end surface 78 of the annular ring 42 is the same as or slightly larger than the projecting height of the annular fixing portion 46 of the valve member 38 from the constricted portion 58. As a result, the tip portion of the locking projection 81 is brought into contact with the inner surface of the bottom portion of the annular groove 56 of the valve member 38 in a close contact state without a gap.

Further, a plurality of (in the present embodiment, eight) auxiliary peripheral walls 84 projecting downward are integrally formed between the locking protrusions 81, 81 that are adjacent to each other in the circumferential direction of the annular ring 42. Here, the protruding size of the auxiliary peripheral wall 84 is made smaller than that of the locking projection 81. As a result, in the annular groove 56 of the valve member 38, a gap 96 is formed on the protruding tip side of the auxiliary peripheral wall 84 at a portion where the auxiliary peripheral wall 84 is inserted and engaged (that is, a portion where the locking projection 81 is not formed). It is supposed to exist.

Since the annular ring 42 is disposed on the outer peripheral portion of the valve member 38 excluding the central portion 44, the inner diameter of the through hole 75 is set to 4.4 mm or more so as not to hinder the connecting operation of the male connector. Preferably. If the inner diameter of the through hole 75 is smaller than 4.4 mm, when a standard luer lock connector defined by ISO 594 is inserted, the luer tip and the annular ring 42 come into contact with each other to damage the lure tip, and the This is because airtightness may be impaired.

Then, after the valve member 38 is inserted from the opening 65 on the small diameter tube portion 64 side of the tubular mouth 40, the annular ring 42 is inserted from the opening 65 on the small diameter tube portion 64 side to form the tubular opening. The open end 92 of the body 40 is secured to the annular ring 42. As a result, the annular fixing portion 46 of the valve member 38 is sandwiched between the annular protrusion 68 of the tubular mouth 40 and the annular ring 42, and the tubular mouth 40, the annular ring 42, and the valve member 38 are assembled together. There is.

In such an assembled state, as shown in FIG. 11, the annular fixing portion 46 of the valve member 38 is fitted into the fitting concave groove 72, and the locking projection 70 formed on the tubular mouth 40 is formed into the valve member. It is fitted in an annular groove 54 formed in the inner surface 50 of the 38. Then, in the annular ring 42 and the tubular mouth body 40 that are fixed to each other, the constricted portion 58 of the valve member 38 is axially moved by the locking projection 70 and the locking projection 81 that are provided so as to project in the mutually opposing direction. It is supported by being sandwiched between.

The fixation of the annular ring 42 to the tubular body 40 is advantageously realized by swaging, for example. More specifically, first, as shown in FIG. 12, the valve member 38 is fitted into the tubular mouth 40, and then the annular ring 42 is fitted into the tubular mouth 40 from above the valve member 38. At this stage, the open end 92 of the tubular mouth 40 is not yet curved, but has a cylindrical shape extending in the axial direction. Next, as shown in a model in FIG. 13, a horn 102 having a circular concave portion 100 with a curved surface 98 formed at the outer peripheral end is used, and the horn 102 is superposed with respect to the open end 92 of the tubular mouth 40. Performs swaging using sonic vibration and high frequency induction heating. As a result, the upper end portion of the tubular mouth 40 is melted and deformed radially inward to be locked and fixed to the outer peripheral edge portion of the annular ring 42.

Particularly, in the present embodiment, the opening end portion 92 of the tubular mouth body 40 is curved so as to enter the annular notch 77 of the annular ring 42 and is locked to the annular ring 42, whereby the tubular mouth body 40 of the tubular mouth body 40 is closed. The upper end surface and the upper end surface of the annular ring 42 are located on substantially the same plane. At the same time, the upper end surface of the annular ring 42 is located substantially flush with the upper end surface of the valve member 38. As a result, the upper end surface of the mixed injection port 36 is formed as a substantially single plane. In addition, as processing conditions suitable for such swaging, when ultrasonic vibration is used, the ultrasonic vibration frequency is set to about 20 to 40 Hz, the load during oscillation is set to about 10 to 100 N, and the opening end is set. It is preferable that the amount of depression of the tubular body 40, which is the amount of depression of the portion 92, be 0.2 to 0.4 mm. Further, as the swaging process, it is possible to use a means such as high frequency induction heating instead of the ultrasonic vibration.

Then, in the mixed injection port 36, the large-diameter tubular portion 62 of the tubular mouth body 40 is fixed by covering the opening portion of the third branch pipe 22 in the holder 12. In the three-way stopcock 10 having such a structure, generally, the first branch opening 24 is connected to the tube on the upstream side of the infusion route, and the second branch opening 26 is connected to the tube on the downstream side. Thus, the first branch pipe 18 and the second branch pipe 20 constitute a part of the infusion route and are disposed on the infusion route.

Then, as shown in FIG. 14, for example, a luer lock connector 104 as a male connector is connected to the mixed injection port 36 provided in the third branch opening 28. Note that FIG. 14A shows a state before the luer lock connector 104 is connected, and FIG. 14B shows a connected state of the lure lock connector 104. The luer lock connector 104 is a conventionally known one having a standard size defined by ISO 594, for example, and has a luer tip 106 having a tapered cylindrical taper shape and forming an external flow path, and a luer tip 106. A surrounding female screw portion 108 is provided.

The luer tip 106 is pushed into the valve member 38 while the female screw portion 108 and the male screw portion 74 of the mixed injection port 36 are screwed together. There, the annular fixing portion 46 of the valve member 38 is locked by the locking projection 70 and the locking projection 80. As a result, the central portion 44 of the valve member 38 is pushed inward of the tubular mouth 40, and the slit 48 is expanded.

As a result, as shown in FIG. 14( b ), the luer tip 106 penetrates the valve member 38, and the tip opening 110 is opened in the internal space of the tubular mouth 40 and connected to the lure tip 106. For example, the internal space such as a syringe is brought into communication with the internal flow path of the third branch pipe 22 through the fluid flow path inside the luer tip 106. At the same time, the female thread portion 108 of the luer lock connector 104 is screwed into the male thread portion 74 of the mixed injection port 36, so that the inserted state of the luer tip 106 is reliably maintained.

With the lure tip 106 inserted, the cock 14 is operated to bring the third branch pipe 22 and the second branch pipe 20 into communication with each other, whereby the drug solution filled in the syringe is mixed and injected onto the infusion route. It becomes possible. After the mixed injection is completed and the lure tip 106 is removed, the elastic restoring force of the valve member 38 causes the central portion 44 to return to the disc shape, and the slit 48 is closed in a substantially airtight manner.

Here, in the mixed injection port 36 having the above-described structure, the concave groove portion 60 of the valve member 38, the locking projection 70 with which the concave groove portion 60 abuts, and the contact inner peripheral surface 71 of the annular projection seat 68. Since they are formed to have a curved concave cross section and a curved convex cross section that correspond to each other, they are stably brought into contact with each other in a close contact state, and a gap is prevented from being generated between the contact surfaces. Therefore, intrusion and retention of the chemical liquid due to the generation of the gap can be effectively avoided.

Moreover, after the luer tip 106 is pulled out, when the valve member 38 is elastically restored and the slit 48 is closed, the locking projection 70 and the annular projection 68 are formed by the recessed groove portion 60 formed in the valve member 38. A recess having a sufficiently large opening width is formed on the surface of the contact inner peripheral surface 71. Therefore, even if the liquid medicine enters the groove 60, a sufficiently large gravity acts on the groove 60 due to the surface tension, and the liquid remains in the groove 60. Can be effectively avoided.

Further, the stress generated in the valve member 38 due to the bending deformation at the time of inserting the lure tip 106 is dispersed by the curved concave cross section set in the concave groove portion 60. In addition, since the valve member 38 and the locking projection 70 and the annular projection seat 68 with which it abuts are formed with a curved concave section and a curved convex section that correspond to each other, the valve member 38 Further dispersion effect of stress and deformation in is exhibited. As a result, the reduction in durability due to the local action of stress or deformation in the valve member 38 can be reduced.

When the lure tip 106 is inserted, the valve member 38 is stretched and deformed by being pulled inward by the frictional force inside the tubular mouth body 40. Therefore, as shown in FIG. 11, such extension is taken into consideration. Then, the surface length of the recessed groove portion 60 in the free state before the insertion of the lure tip 106 is smaller than the surface length of the abutting inner peripheral surface 71 of the locking protrusion 70 and the annular protruding seat 68.

Further, in the mixed injection port 36 of the present embodiment, when the lure tip 106 is inserted, the inner surface 50 of the central portion 44 of the valve member 38 abuts the cylindrical surface 73 of the small diameter tubular portion 64, so that the lure. The position of the insertion end of the chip 106 is defined. Therefore, as compared with the case where the insertion end position of the lure tip 106 is defined by direct contact with the tubular mouth 40 or the annular ring 42, the insertion end position of the luer tip 106 with respect to the valve member 38 is determined. A sufficient compression force can be applied stably. As a result, the sealing effect of the valve member 38 can be stably obtained, and the reliability of the sealing property of the fluid passage can be improved.

Although FIG. 14 illustrates a luer lock type connector having a female threaded portion 108 as a male connector, a so-called luer slip type connector having no female threaded portion 108 but only a luer tip 106 is of course also used. Can be connected. Particularly in the case of a luer slip type connector, the luer tip is maintained in the connected state only by the elastic restoring force of the valve member 38. Further, when only the luer slip type is targeted as the male connector, the stepped shape of the tubular mouth 40 and the male screw portion 74 are not necessarily required.

Further, in the three-way stopcock 10 of the present embodiment, since the locking projection 80 provided on the annular ring 42 has a plurality of projection shapes including the plurality of locking projections 81, the insertion of the lure tip 106 is performed. At this time, the locking fixing force with respect to the valve member 38 can be concentrated on each locking projection 81 provided intermittently in the circumferential direction. As a result, a large retaining force for the valve member 38 can be stabilized, and the radial width of the annular fixing portion 46 can be reduced.

That is, according to the three-way stopcock 10 according to the present embodiment, it is possible to realize a small diameter of the mixed injection port 36 while securing a strong fixing strength of the valve member 38 with an extremely simple structure. Thus, it is possible to connect both the standard luer lock type connector and the luer slip type connector without any special connector.

Further, a gap 96 is formed in a portion of the annular groove 56 where the locking projection 81 is not fitted, and the gap 96 also secures an escape area for elastic deformation of the valve member 38.

Furthermore, in the connected state of the lure tip 106, the lure tip 106 is held only by the valve member 38 and is not in contact with the tubular mouth 40 or the annular ring 42. As a result, the problem that the scraped resin is mixed into the fluid flow path due to the lure tip 106 rubbing against the annular ring 42 or the like can be completely avoided, and further improvement in hygiene can be achieved. It

Although one embodiment of the present invention has been described above, this is merely an example, and the present invention should not be limitedly interpreted by the specific description of the embodiment.

For example, in the above-described embodiment, the annular ring 42 having the locking projection 80 composed of the plurality of locking projections 81 is adopted, but in the present invention, the locking projection 80 is provided. The adoption of the annular ring 42 is not essential. You may employ|adopt the annular ring 42 of a constant cross-sectional shape over the whole circumference.

Further, the size of the recessed groove portion 60 is set in consideration of the viscosity and specific gravity of the liquid to be used so that the liquid does not stay in the recessed groove portion 60 due to the effect of surface tension. In the present invention, the radial width dimension and the depth dimension of the concave groove portion 60 are not limitedly interpreted.

Further, in the above-described embodiment, the annular projecting seat 68 is formed on the tubular mouth body 40, and the valve member 38 is supported by the tubular mouth body 40 formed separately from the holder 12. It is also possible to directly form the valve seat in the above, and in the above embodiment, the valve seat may be formed in the opening portion of the third branch pipe 22 in the holder 12.

Further, in the above-described embodiment, the application example of the medical valve according to the present invention to the medical connector provided with the housing of the three-way stopcock is shown, but the present invention is applied to various conventionally known medical fluid flow paths. It is applicable to a medical valve provided in a member provided with various types of housings. For example, as shown in FIGS. 15A and 15B, the present invention can be applied to the plug 112 and the T-shaped mixed injection pipe 114.

In addition, although not enumerated one by one, the present invention can be carried out in a mode in which various changes, modifications, improvements, etc. are added based on the knowledge of those skilled in the art. Needless to say, all of them are included in the scope of the present invention without departing from the spirit of the above.

The invention described in the above embodiments can also solve the problems described below.

In the conventional structure in which the outer peripheral portion of the disk-shaped elastic valve body is supported by being sandwiched by a pair of claw-shaped annular locking projections, in the elastic valve body supporting portion by the annular locking projections, A small gap is likely to occur between the elastic valve body. This gap is difficult to avoid because it is caused not only by the dimensional error at the time of molding the annular locking projection and the elastic valve element but also by the elastic deformation of the elastic valve element. In addition, by repeatedly attaching and detaching the male connector to and from the elastic valve body, a new gap may be generated due to plastic deformation and deterioration of the elastic valve body, and it is difficult to manage the generation of the gap.

The existence of such a gap causes a problem that the chemical solution or the like tends to stay in the gap. In particular, since the gap is narrow, the surface tension of the chemical liquid makes it difficult for the accumulated chemical liquid or the like to escape, and it may be necessary to take measures against contamination due to long-term retention.

Here, the invention described in the above embodiment is made in view of the circumstances as described above, and the problem to be solved is that the gap formed in the support portion of the disk-shaped elastic valve body is It is an object of the present invention to provide a medical valve having a novel structure, which can prevent retention of a chemical solution and the like and can reduce stress concentration at the time of elastic deformation of an elastic valve body to improve durability.

The present invention originally includes the inventions described below, and a supplementary note will be given regarding the configuration and operational effects thereof.

According to the invention, a disc-shaped elastic valve body having a slit formed in a central portion is attached to an opening member forming an opening portion of a fluid flow path, and a male connector is attached to the slit of the elastic valve body. A medical valve that can be repeatedly inserted and removed, wherein an annular constricted portion is provided by forming annular grooves extending in the circumferential direction on both the inner and outer surfaces of the outer peripheral portion of the elastic valve body. The outer peripheral side of the constricted portion is a ring-shaped fixed portion, while the valve seat is formed so as to project to the inner peripheral side of the opening member, and the annular ring is formed on the opening member from the opening side. Is assembled and fixed, and the annular fixed portion of the elastic valve element is sandwiched and supported by the valve seat and the annular ring, and the valve seat and the inner peripheral edge of the annular ring are supported. Respective locking projections are formed to project, these locking projections are locked to the annular grooves formed on both inner and outer surfaces of the elastic valve body, and the locking projections are formed to project. The inner peripheral surface of the valve seat has a curved convex sectional shape, and the inner peripheral side wall surface of the annular groove formed on the inner surface of the elastic valve body corresponds to the inner peripheral surface of the valve seat. The inner peripheral side wall surface of the annular groove of the elastic valve body is opposed to the inner peripheral surface of the valve seat with a gap in the radial direction. By inserting the connector into the slit of the elastic valve body, the inner peripheral side wall surface of the annular groove of the elastic valve body is brought into contact with and overlapped with the inner peripheral surface of the valve seat. A medical valve is a structural feature.

[Operation and effect of the invention]
In the medical valve having the structure according to the invention, in the locking portion of the locking projection with respect to the inner surface side (fluid flow path side) of the elastic valve body, the inner peripheral surface of the valve seat having the locking projection and the elastic valve body are provided. A gap is actively formed between and. Therefore, even if the chemical liquid or the like enters the gap between the locking protrusion and the elastic valve body, the gap is set to be large, so that the retention due to the surface tension can be prevented.

Moreover, the inner peripheral surface of the valve seat forming the locking projection and the inner peripheral wall surface of the annular groove of the elastic valve body, which face each other with a gap therebetween in the radial direction of the elastic valve body, have curved projections corresponding to each other. It has a profile cross section and a curved concave cross section. Therefore, when the elastic valve body is elastically deformed so as to enter the fluid flow path side when a syringe or the like is connected, the inner peripheral surface of the valve seat and the inner peripheral side wall surface of the annular groove of the elastic valve body, which face each other across the gap, are formed. And abut each other in a close contact state. As a result, the gap disappears and it is possible to prevent the chemical liquid or the like from entering the gap itself.

In addition, the inner peripheral surface of the valve seat and the inner peripheral wall surface of the annular groove of the elastic valve body, which face each other across the gap, have curved convex cross sections and curved concave cross sections corresponding to each other. Even when the elastic valve element is elastically deformed by the connection of a syringe or the like, local stress and concentration of deformation are avoided in the elastic valve element. As a result, when connecting a male connector such as a syringe, elastic deformation of the elastic valve body is stably realized, and the male connector is inserted through the elastic valve body on the wide surface of the connecting member including the valve seat. The part can be held stably. In addition, the durability of the elastic valve body is improved, and the plastic deformation is suppressed, so that a new gap is generated due to repeated attachment/detachment of the male connector to/from the elastic valve body, and the resulting problem of retention of the chemical liquid or the like. Can also be effectively prevented.

[Other aspects and effects of the invention]
In the invention having the above-mentioned structural features, it is possible to employ any of the following aspects in an appropriate combination as needed.

For example, in the invention, in the elastic valve body, the cross-sectional length dimension of the inner peripheral side wall surface of the annular groove having the curved concave cross-sectional shape is equal to the inner circumference of the valve seat having the curved convex cross-sectional shape in the opening member. A configuration adapted to the cross-sectional length dimension of the surface may be employed. With this configuration, when the elastic valve body is elastically deformed so as to enter the fluid flow path side by mounting a syringe or the like, the inner peripheral surface of the valve seat and the annular groove of the elastic valve body, which are opposed to each other with a gap, are provided. The peripheral side wall surface can be abutted on the peripheral side wall in a more highly adhered state, and the intrusion of the chemical liquid or the like into the gap can be prevented more effectively. The cross-sectional length dimension of the inner peripheral side wall surface of the annular groove and the cross-sectional length dimension of the inner peripheral surface of the valve seat are substantially the same so that they can be in close contact with each other in consideration of elastic deformation of the elastic valve body. It should be set to.

Further, in the invention, in the opening member forming the opening portion of the fluid passage, the cylindrical wall portion extending inward of the fluid passage from the protruding portion of the valve seat is provided, and the male connector to be connected is elastic. The elastic valve element is inserted into the slit of the valve element and is spread inward of the opening member, so that the elastic valve element is brought into contact with the inner peripheral surface of the cylindrical wall portion. Can be done. According to such a configuration, for example, when the tip end of the syringe is inserted into the elastic valve body and connected to the fluid flow path, the insertion end position of the syringe tip is abutted (engaged) with the opening member. Instead of being regulated, the elastic valve element may be sandwiched between the tubular wall portion of the opening member and the cylindrical wall portion, and may be regulated in a compressed state. Thereby, for example, the tip portion of the male connector can be stably held via the elastic valve body, and the reliability of the connection state of the male connector to the fluid flow path can be improved. Moreover, since a large compressive force is reliably exerted on the elastic valve element when the male connector is connected, the stability and reliability of the sealing performance of the elastic valve element can be improved.

Further, in the invention, it is possible to adopt a configuration in which at least one of the locking projection of the valve seat and the locking projection of the annular ring has a plurality of projection shapes divided in the circumferential direction. By forming the locking projections in a plurality of projection shapes, the locking force of the locking projections with respect to the elastic valve body can be improved based on the stress acting on the elastic valve body and the concentration of elastic deformation. I can. As a result, it is possible to reduce the size of the elastic valve body while preventing the problem of the elastic valve body falling off when the male connector is attached or detached.

Further, in the invention, the opening member has a stepped tubular shape composed of a large diameter tubular portion and a small diameter tubular portion, and is fixed to a separate fluid flow path forming member in the large diameter tubular portion, A configuration in which a male screw portion is formed on the outer peripheral surface of the small-diameter cylindrical portion to allow connection of a luer lock type connector can be adopted.
Furthermore, as is apparent from the above description of the embodiment, the invention includes the following first to third aspects.
According to a first aspect, a disc-shaped elastic valve body having a slit formed in a central portion is attached to an opening member that constitutes an opening portion of a fluid flow path, and a male member is attached to the slit of the elastic valve body. A medical valve in which a connector can be repeatedly inserted and removed, wherein an annular constricted portion is provided by forming annular grooves extending in the circumferential direction on both inner and outer surfaces of the outer peripheral portion of the elastic valve body. An outer peripheral side of the constricted portion of the valve body is an annular fixing portion, a valve seat is formed in the opening member, and an annular ring is attached to the opening member from the opening side. The valve seat and the annular ring sandwich and support the annular fixing portion of the elastic valve body, and the valve seat and the annular ring are formed with protruding protrusions. The locking projections are respectively locked in the annular grooves formed on both inner and outer surfaces of the elastic valve body, and the inner peripheral surface of the valve seat having the locking projections is formed. The inner peripheral side wall surfaces of the annular groove of the elastic valve body are opposed to each other with a gap in the radial direction, and the male connector is inserted into the slit of the elastic valve body, so that the valve receiving A medical valve, wherein an inner peripheral surface of the seat is adapted to abut and overlap an inner peripheral side wall surface of the annular groove of the elastic valve body.
In the medical valve having the structure according to the first aspect, the inner peripheral surface of the valve seat having the locking projection at the locking portion of the locking projection with respect to the inner surface side (fluid flow path side) of the elastic valve body. A gap is positively formed between the elastic valve body and the elastic valve body. Therefore, even if the chemical liquid or the like enters the gap between the locking protrusion and the elastic valve body, the gap is set to be large, so that the retention due to the surface tension can be prevented.
Moreover, the inner peripheral surface of the valve seat, which forms the locking projection, and the inner peripheral side wall surface of the annular groove of the elastic valve body, which are opposed to each other with a gap therebetween in the radial direction of the elastic valve body, are connected when a syringe or the like is connected. When the elastic valve body is elastically deformed so as to enter the fluid flow path side, the inner peripheral surface of the valve seat and the inner peripheral side wall surface of the annular groove of the elastic valve body, which face each other with a gap therebetween, are in close contact with each other. Contact. As a result, the gap disappears and it is possible to prevent the chemical liquid or the like from entering the gap itself.
In a second aspect, the opening member is provided with a cylindrical wall portion extending inward of the fluid flow path from the position where the locking projection is formed, and the male connector is inserted into the slit of the elastic valve body. As a result, the inner surface of the elastic valve body located on the inner peripheral side of the annular groove and spaced apart from the inner peripheral surface of the opening member has an inner surface extending over the inner peripheral surface of the tubular wall portion. The medical valve according to the first aspect, which is abutted against each other and overlapped.
In a third aspect, a disk-shaped elastic valve body having a slit formed in the central portion is attached to an opening member that constitutes an opening portion of a fluid flow path, and a male member is attached to the slit of the elastic valve body. A medical valve in which a connector can be repeatedly inserted and removed, wherein an annular constricted portion is provided by forming annular grooves extending in the circumferential direction on both inner and outer surfaces of the outer peripheral portion of the elastic valve body, An outer peripheral side of the constricted portion of the elastic valve body is an annular fixing portion, and an annular ring is attached to the opening member from the opening side, and formed on both inner and outer surfaces of the elastic valve body. Inner and outer locking projections that are respectively locked in the annular groove are formed in the opening member and the annular ring, and the annular fixing portion is fixedly supported by the opening member, while the elastic valve body is provided. In the outer periphery of the central portion where the slit is formed, a concave groove portion that extends in the circumferential direction is formed and opens toward the inner surface of the elastic valve body, and the elastic valve body is formed more than the portion where the concave groove portion is formed. Has a thick central portion, and when the male connector is inserted into the slit, the inner surface shape of the groove is not constrained by the locking projection and elastic deformation is allowed. A medical valve that is characterized by

10: three-way stopcock, 12: holder, 24: first branch opening, 26: second branch opening, 28: third branch opening, 36: mixed injection port, 38: valve member, 40: tubular Mouth body, 42: annular ring, 44: central portion, 46: annular fixing portion, 48: slit, 54: annular groove, 56: annular groove, 58: constricted portion, 60: concave groove portion, 68: annular protrusion seat, 70: Locking protrusion, 71: Inner surface of contact, 80: Locking protrusion, 81: Locking protrusion

Claims (4)

An annular constricted portion is provided by forming annular grooves that extend in the circumferential direction on both the inner and outer surfaces of the outer peripheral portion, and the outer peripheral side of the constricted portion is an annular fixed portion, and a slit is formed in the central portion. And a disk-shaped elastic valve body, which is arranged at the opening of the fluid flow path and in which the male connector can be repeatedly inserted into and removed from the slit, is formed on both inner and outer surfaces of the elastic valve body. A medical valve in which the elastic valve body is held at the opening of the fluid flow path by locking the locking projections to the annular groove,
On the inner surface of the elastic valve body, the distal end of the locking projection abuts against the annular groove and is locked, and the concave groove portion extending in the circumferential direction on the inner peripheral side of the locking projection is the inner surface of the elastic valve body. Is formed so as to open toward, while elastic deformation of the inner surface shape of the concave groove portion is allowed when the male connector is inserted into the slit,
The male connector is inserted through the slit, and the outer surface of the central portion abuts against the outer peripheral surface of the male connector when the male connector is inserted through the slit. A medical valve characterized by being used. The medical device according to claim 1, wherein an inner surface of the central portion of the elastic valve body is in contact with an inner peripheral surface of an opening portion of the fluid flow path in a state where the male connector is inserted through the slit. valve. A cylindrical portion is provided that extends inward of the position where the locking protrusion is formed, and the elastic valve body is elastically deformed downward and positioned when the male connector is inserted through the slit. The medical valve according to claim 1 or 2 , wherein an inner peripheral surface of the tubular portion is wider than an inner peripheral surface of the locking projection. Wherein the cylindrical portion extending from the opening portion inwardly resilient valve member is mounted, the external thread of the luer lock connector of the internal thread of the male connector is screwed in claim 1-3, which is formed on the outer peripheral surface The medical valve according to any one of claims.

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