JP6922402B2 - Connector with cap - Google Patents

Description

The present invention relates to a connector connected to a container containing a chemical solution, and belongs to the technical field of a structure provided with a cap for covering a connecting tube portion of the connector, particularly when in a disconnected state.

Patent Document 1 discloses a connector connected to an infusion container containing a drug solution to be administered to a patient. The connector of Patent Document 1 has an male lure portion forming a flow path communicating with the infusion container and an outer cylinder surrounding the male lure portion, and the infusion container is connected to the male lure portion to be inside the male lure portion. The flow path and the inside of the infusion container communicate with each other.

This connector is provided with a cap. The cap is configured to be removable from the tip of the connector, and the connector and the cap are connected by a band. The cap of Patent Document 1 includes a top plate that opens and closes an outer cylinder, and a cylindrical sealing cylinder that protrudes from the top plate. The male lure portion of the connector is fitted inside the sealing cylinder, and the outer cylinder is closed by the top plate in this state.

Japanese Unexamined Patent Publication No. 2016-158656

By the way, by providing a cap on the connector as in Patent Document 1, it is excellent in that the flow path of the male lure portion can be kept clean before connecting to the connector. However, since the connector and cap are generally made of resin material, if the atmospheric temperature changes during sterilization or storage, for example, when the cap is connected to the connector, the fitting force of the cap will be affected by thermal expansion and contraction due to the temperature change. May decrease. If the fitting force of the cap is reduced, the cap may fall off from the connector. When the cap is removed, the flow path of the male lure portion is exposed and exposed to the outside air, so that it becomes difficult to maintain the male lure portion in a clean state.

Therefore, it is conceivable to set the fit between the cap and the connector tightly in advance to prevent the cap from falling off due to a temperature change. However, if the fitting is set tightly in this way, a large amount of force is required when trying to fit the cap to the connector during manufacturing or use, or when trying to remove the cap from the connector, resulting in poor workability. There is a problem. In particular, when quick operation is required in the medical field, deterioration of workability may become a big problem.

The present invention has been made in view of this point, and an object of the present invention is to allow the cap to be a connector without deteriorating workability when attaching or detaching a cap for covering the connection tube portion of the connector to or from the connector. The purpose is to prevent the connector from falling off and keep the connector clean.

In order to achieve the above object, in the present invention, the connector body is provided with an engaging portion that engages with the cap, and the engaging portion can be displaced from the position where it engages with the cap to the position where the cap can be removed.

The first invention includes a connecting pipe portion connected to a container containing a chemical solution and a tubular connector main body provided so as to surround the periphery of the connecting pipe portion, and is provided at the tip of the connector main body. In a connector with a cap to which a cap covering the connection pipe portion is attached, the connector body has an engaging portion that engages with the cap and the engaging portion from an engaging position that engages with the cap. It is characterized in that an elastically deformed portion that is displaced to a removable position is provided so that the connector can be removed from the main body of the connector.

According to this configuration, when the cap is attached to the tip of the connector body, the engaging portion engages with the cap and the cap is attached to the connector body. At this time, in the present invention, the engagement portion is engaged with the cap instead of the conventional fitting, so that even if the atmospheric temperature changes during sterilization or storage, for example, each member thermally expands or contracts. , It becomes difficult for the cap to come off from the connector body.

On the other hand, when the elastically deformed portion of the connector body is elastically deformed to displace the engaging portion from the engaging position to the removable position of the cap, the cap can be removed from the connector body.

In the second invention, in the first invention, a part of the connector body in the circumferential direction is the elastically deformed portion, and a slit is formed between the elastically deformed portion of the connector body and the other portion. It is characterized by being.

According to this configuration, the elastically deformed portion can be easily elastically deformed while being formed of a part of the connector body.

In the third invention, in the second invention, the elastically deformed portion is formed in a plate shape extending in the axial direction of the connector body, and the axially proximal base end portion of the elastically deformed portion of the connector body is the connector. While connected to the main body, the axially tip portion of the connector main body in the elastically deformed portion is a free end portion, and the engaging portion is provided at the free end portion of the elastically deformed portion.

According to this configuration, by elastically deforming the elastically deformed portion, a large displacement amount of the tip portion of the elastically deformed portion can be secured and the position of the engaging portion can be reliably displaced from the engaging position to the removable position. It will be possible.

A fourth aspect of the present invention is the third invention, wherein the cap has an insertion cylinder portion to be inserted into the inside of the connector body, and a protrusion portion protruding outward in the radial direction on the outer peripheral surface of the insertion cylinder portion. Is formed, the engaging portion is arranged so as to engage with the protruding portion, and the elastically deformed portion is characterized in that the free end portion is elastically deformed so as to be displaced in the radial direction of the connector body. do.

According to this configuration, when the cap is attached to the tip end portion of the connector body, the insertion tube portion of the cap is inserted inside the connector body, so that the protruding portion of the insertion tube portion is arranged inside the connector body. In this state, the engaging portion engages with the protruding portion of the insertion cylinder portion to prevent the cap from coming off.

On the other hand, since the engaging portion is disengaged from the protruding portion of the insertion cylinder portion by elastically deforming the elastically deformed portion so that the free end portion of the elastically deformed portion is displaced outward in the radial direction of the connector body, the cap is removed from the connector body. Can be removed.

A fifth aspect of the present invention is characterized in that, in the fourth invention, the elastically deformed portion is provided with an operating portion for operating the elastically deformed portion so as to project outward in the radial direction of the connector body. And.

According to this configuration, the elastically deformed portion can be easily elastically deformed by operating the elastically deformed portion from the outside of the connector body by the operating portion.

In the sixth aspect of the invention, in the fourth invention, with the cap attached to the connector body, the protruding portion of the cap is arranged on the axially proximal end side of the connector body with respect to the engaging portion. The front end side surface of the protruding portion located on the tip end side of the connector body is a surface that contacts and engages with the engaging portion, and the tip side surface is closer to the tip of the protruding portion in the protruding direction of the connector. It is characterized in that it is formed so as to be located on the base end side of the main body.

According to this configuration, when the cap is attached to the connector body, the protruding portion of the cap is located closer to the base end side of the connector body than the engaging portion, and the tip side surface of the protruding portion contacts and engages with the engaging portion. It will be in the state of. This makes it difficult for the cap to come off.

On the other hand, when removing the cap, the side surface of the tip of the protruding portion is located closer to the base end side of the connector body as it approaches the tip in the protruding direction. The elastically deformed portion can be elastically deformed by pressing the engaging portion with the front end side surface of the protruding portion simply by applying a force. As a result, the engaging portion is switched to the removable position over the protruding portion. That is, the cap can be removed by simply pulling out the insertion cylinder portion of the cap from the tip portion of the connector body without operating the elastically deformed portion.

According to a seventh aspect of the present invention, in any one of the fourth to sixth aspects, the cap extends in a direction intersecting the axial direction of the connector body and has a covering portion covering the tip end portion of the connector body. The covering portion abuts on the tip end portion of the connector body.

According to this configuration, since the tip portion of the connector body is covered by the covering portion of the cap, foreign matter and the like are less likely to adhere to the connecting pipe portion. Then, the cap is positioned by abutting the covering portion on the tip end portion of the connector body.

According to the first invention, the connector body is provided with an engaging portion that engages with the cap, and this engaging portion can be displaced from the position where the cap engages to the removable position of the cap. It is possible to prevent the cap from falling off from the connector and keep the connecting pipe portion clean without deteriorating the workability when attaching and detaching the connector.

According to the second invention, since the elastically deformed portion is formed by a part of the connector body in the circumferential direction and a slit is formed between the elastically deformed portion of the connector body and the other portion, the elastically deformed portion is easily elastic. It can be transformed.

According to the third invention, while the base end portion of the elastically deformed portion is connected to the connector main body, the tip end portion of the elastically deformed portion is a free end portion, and the engaging portion is provided at the free end portion. A large amount of displacement can be secured, and the position of the engaging portion can be reliably displaced from the engaging position to the removable position.

According to the fourth invention, the cap can be attached to the connector body by engaging the engaging portion with the protruding portion of the insertion cylinder portion of the cap. When removing the cap, it can be easily removed by displacing the free end portion of the elastically deformed portion radially outward of the connector body.

According to the fifth invention, since the elastically deformed portion can be operated by the operating portion from the outside of the connector main body, the engaging portion can be easily switched from the engaging position to the removable position.

According to the sixth invention, the side surface of the tip of the protruding portion formed in the insertion cylinder portion of the cap is shaped to be located closer to the tip end in the protruding direction toward the base end side of the connector body, so that the insertion cylinder portion of the cap is connected to the connector. The cap can be easily removed by simply pulling it out from the tip of the main body.

According to the seventh invention, by providing the cap with a covering portion that covers the tip portion of the connector body, foreign matter and the like are less likely to adhere to the connecting pipe portion, and the covering portion is brought into contact with the tip portion of the connector body. , The cap can be positioned with the cap attached to the connector body.

It is a side view of the infusion set which concerns on embodiment of this invention. It is sectional drawing which shows the state which connected the connector to an infusion bag. It is a side view of the connector with a cap. It is sectional drawing of the connector with a cap. It is a perspective view of a cap. It is a bottom view of a cap. FIG. 6 is a cross-sectional view taken along the line VII-VII in FIG. It is sectional drawing which shows the state which connected the connector to a vial.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

FIG. 1 is a side view of the infusion set 100 according to the embodiment of the present invention. This infusion set 100 is for medical use for administering a drug solution to a patient, and has a needle 102 for connecting a container to which a first infusion bag 101 containing the drug solution is connected and a second needle 102 containing the drug solution. To the downstream side, the connector 1 to which the infusion bag 103 is connected, the first tube 104 connected to the base end of the container connecting needle 102, and the second tube 105 connected to the base end of the connector 1. It includes an extending third tube 106. The downstream end of the first tube 104, the downstream end of the second tube 105, and the upstream end of the third tube 106 are connected via a conventionally known flow path switching member 107. In addition to the above-mentioned infusion bags 101 and 103, various infusion containers such as vials, which will be described later, can be connected to the container connecting needle 102 and the connector 1.

A drip tube 108 is provided in the middle of the third tube 106. A clamp 109 is provided on the downstream side of the drip tube 108 of the third tube 106. Further, a mixed injection port 110 is provided on the downstream side of the clamp 109 of the third tube 106. A puncture needle (not shown) to be punctured by the patient is connected to the downstream end of the third tube 106.

The connector 1 is a capped connector having a cap 60 as shown in FIGS. 3 and 4, and is connected to the second infusion bag 103 with the cap 60 removed as shown in FIG. A rubber stopper member 103b is provided at the downstream end of the pipe portion 103a of the second infusion bag 103 shown in FIG. Further, a back adapter 120 is detachably attached to the pipe portion 103a. The back adapter 120 includes a claw 121 that engages with the outer peripheral surface of the pipe portion 103a, and a needle 122 that can pierce the plug member 103b. The needle 122 is a hollow needle and is arranged so as to project upward in this embodiment. By piercing the stopper member 103b with the needle 122, the inside of the second infusion bag 103 and the inside of the needle 122 are in communication with each other.

Further, at the lower part of the bag adapter 120, the outer cylinder portion 123 is formed so as to project downward. The inside of the outer cylinder portion 123 communicates with the inside of the needle 122. A rubber stopper member 124 is provided at the lower end of the outer cylinder portion 123. A recess 123a is formed on the outer peripheral surface of the outer cylinder portion 123 on the upper side of the plug member 124. The recess 123a can be continuously provided in the circumferential direction of the outer cylinder portion 123.

The connector 1 includes a substantially cylindrical connector main body 2 having an open upper portion, a bottom plate portion 3, a connecting pipe portion 4, and a tube connecting tubular portion 5. The connector body 2, the bottom plate 3, the connecting tube 4, and the tube connecting tube 5 are integrally molded with an elastic resin material. The connector main body 2 has an inner diameter capable of accommodating the outer cylinder portion 123 of the bag adapter 120, and is in a posture of extending in the vertical direction in a state of being connected to the second infusion bag 103. The axial dimension of the connector main body 2 (vertical direction in FIGS. 2 to 4) is set longer than the axial dimension of the outer cylinder portion 123 of the second infusion bag 103, and is above the connector main body 2. In a state where the outer cylinder portion 123 of the second infusion bag 103 is housed, the lower end portion of the connector main body 2 is located below the lower end portion of the outer cylinder portion 123 of the second infusion bag 103.

In the description of this embodiment, when the second infusion bag 103 is connected to the connector 1 and used, the upper side is referred to as "upper side" and the lower side is referred to as "lower side". , This is for convenience of explanation only, and either connector 1 may be on top.

The bottom plate portion 3 has a substantially circular plate shape extending in a direction substantially orthogonal to the axial direction of the connector main body 2, and is continuous with the lower end portion of the connector main body 2 so as to close the lower end portion of the connector main body 2. .. By providing the bottom plate portion 3, the connector main body 2 has a bottomed tubular shape.

As shown in FIG. 4, the connecting pipe portion 4 is provided so as to project upward from the radial center portion of the bottom plate portion 3. At the upper end of the connecting pipe portion 4, an opening 4a serving as a communication port for communicating the inside and the outside of the connecting pipe portion 4 is formed. As shown in FIG. 2, the upper side of the connecting pipe portion 4 is inserted into the plug member 124 of the bag adapter 120 with the connector 1 attached to the bag adapter 120. As a result, the connecting pipe portion 4 is in a state of communicating with the inside of the second infusion bag 103 via the needle 122 of the bag adapter 120 and the outer cylinder portion 123, and the connecting pipe portion 4 and the second infusion bag 103 are connected. ..

As shown in FIG. 4, the connecting pipe portion 4 is formed so that the diameter is reduced toward the upper end. The upper end portion of the connecting pipe portion 4 is located below the upper end portion of the connector main body 2. The shaft of the connecting pipe portion 4 is located concentrically with the shaft of the connector main body 2, and the second infusion bag is located between the outer peripheral surface of the connecting pipe portion 4 and the inner peripheral surface of the connector main body 2. A space R into which the outer cylinder portion 123 of 103 can be inserted is formed.

The lower end of the connecting pipe portion 4 is a downstream end opening 4b that opens on the lower surface of the bottom plate portion 3. The downstream end opening 4b is located at the center on the lower surface of the bottom plate portion 3. The tube connection tube portion 5 is formed so as to project downward from the center portion of the lower surface of the bottom plate portion 3. The upper end portion (upstream end portion) of the tube connecting tube portion 5 and the downstream end opening 4b of the connecting pipe portion 4 communicate with each other. The inner diameter of the tube connecting cylinder portion 5 is set to be larger than the inner diameter of the connecting pipe portion 4.

As shown in FIG. 3, a screw thread 5a is formed on the outer peripheral surface of the tube connecting cylinder portion 5 so as to project outward in the radial direction of the tube connecting cylinder portion 5 and extend spirally. The second tube 105 can also be connected to the tube connecting tube portion 5 via a connecting member (not shown) having a conventionally known luer taper.

The connector main body 2 has a tubular shape formed so as to surround the periphery of the connecting pipe portion 4. The connector main body 2 is provided with an engaging portion 20 and an elastically deforming portion 21. The elastically deformed portion 21 is formed of a part of the connector main body 2 in the circumferential direction, and a first slit is formed between the elastically deformed portion 21 of the connector main body 2 and the other portion as shown in FIG. 22, the second slit 23, and the upper slit 24 are formed. The elastically deformed portion 21 is formed in a plate shape extending in the axial direction of the connector main body 2, that is, in the vertical direction. The axial base end (lower end) of the connector body 2 in the elastically deformed portion 21 is connected to the connector body 2, while the axial tip (upper end) of the connector body 2 in the elastically deformed portion 21 is a free end. It is said to be a department. An engaging portion 20 is provided at a free end portion of the elastically deformed portion 21.

The first slit 22, the second slit 23, and the upper slit 24 are for separating the elastically deformed portion 21 from other portions of the connector main body 2 except for the lower end portion thereof. The first slit 22 and the second slit 23 extend linearly in the axial direction of the connector main body 2. The first slit 22 and the second slit 23 are positioned so as to sandwich the elastically deformed portion 21 from both sides in the circumferential direction of the connector main body 2. The shapes of the first slit 22 and the second slit 23 are not particularly limited, and may be inclined and extended. The width of the elastically deformed portion 21 can be set by the distance between the first slit 22 and the second slit 23. The force required to elastically deform the elastically deformed portion 21 can be arbitrarily adjusted depending on the width and thickness of the elastically deformed portion 21, the type of resin material constituting the elastically deformed portion 21, and the like.

The lower ends of the first slit 22 and the second slit 23 are located near the upper surface of the bottom plate portion 3. On the other hand, the upper ends of the first slit 22 and the second slit 23 are located below the upper ends of the connector body 2. Further, the upper slit 24 is a slit for connecting the upper end portion of the first slit 22 and the upper end portion of the second slit 23. The upper slit 24 is located below the upper end portion of the connector main body 2, extends in the circumferential direction of the connector main body 2, and one end portion is continuous with the upper end portion of the first slit 22 and the other. Is continuous with the upper end of the second slit 23. The portion surrounded by the three slits of the first slit 22, the second slit 23, and the upper slit 24 is the elastically deformed portion 21.

The elastically deformed portion 21 has a base end portion connected to the connector main body 2 via a bottom plate portion 3 to form a fixed end portion. As a result, when an external force is applied to the elastically deformed portion 21 in the radial direction of the connector body 2, the elastically deformed portion 21 as a whole is displaced so that the upper end portion, which is the free end portion thereof, is displaced in the radial direction of the connector main body 2. Will be elastically deformed.

The engaging portion 20 is provided so as to project inward in the radial direction of the connector main body 2 at the upper end portion (free end portion) of the elastically deformed portion 21. The engaging portion 20 can be composed of a ridge portion extending in the width direction of the elastically deformed portion 21 (circumferential direction of the connector main body 2). The upper surface (the surface of the connector body 2 located on the axial end side) 20a of the engaging portion 20 is formed so as to be located lower toward the protruding end of the engaging portion 20. Further, the lower surface (the surface of the connector body 2 located on the axial base end side) 20b of the engaging portion 20 extends in the radial direction of the connector body 2. Therefore, the engaging portion 20 has a sharp shape toward the tip in the protruding direction.

As shown in FIG. 2, the engaging portion 20 is adapted to engage with the inner surface of the recess 123a by entering the recess 123a of the outer cylinder portion 123 of the bag adapter 120. Further, as shown in FIG. 4, although the details will be described later, the engaging portion 20 also engages with the cap 60.

In this embodiment, when the second infusion bag 103 is not connected to the connecting pipe portion 4, that is, when the connecting pipe portion 4 is not used, the cap 60 that covers the connecting pipe portion 4 is attached to the tip end portion of the connector main body 2. Is configured to allow As shown in FIGS. 3 and 4, the cap 60 becomes the connector with a cap 1 in the state of being attached to the connector main body 2, but when the second infusion bag 103 is connected to the connection pipe portion 4, the cap 60 is attached to the connector main body. The connection pipe portion 4 can be exposed by removing it from 2.

The elastically deformed portion 21 is provided with an operating portion 25 for operating the elastically deformed portion 21 so as to project outward in the radial direction of the connector main body 2. The operating portion 25 is integrally molded with the elastically deformed portion 21. The base end portion of the operating portion 25 is integrated with a portion closer to the upper side in the vertical intermediate portion of the elastically deformed portion 21. The operating portion 25 has a lever shape extending downward, and the tip portion of the operating portion 25 is located below the bottom plate portion 3 and above the lower end portion of the tube connecting tube portion 5. ing.

(Structure of cap 60)
As shown in FIGS. 5 to 7, the cap 60 includes an insertion cylinder portion 61 inserted into the connector main body 2, a covering portion 62 that covers the tip portion of the connector main body 2, an outer peripheral wall portion 63, and a holder. It has a part 64 and. The insertion cylinder portion 61, the covering portion 62, the outer peripheral wall portion 63, and the holder portion 64 are integrally molded with a resin material. As shown in FIG. 4, the insertion tube portion 61 is inserted into the space R formed between the outer peripheral surface of the connecting pipe portion 4 and the inner peripheral surface of the connector main body 2. The lower end of the insertion tube portion 61 is located below the opening 4a of the connecting pipe portion 4 in a state of being completely inserted into the space R, and is separated from the upper surface of the bottom plate portion 3 upward.

A plurality of projecting portions 61a projecting outward in the radial direction of the insertion cylinder portion 61 are formed on the outer peripheral surface of the insertion cylinder portion 61. The engaging portion 20 of the connector main body 2 is arranged so as to engage with the protruding portion 61a of the cap 60. The protruding portions 61a are arranged at intervals in the circumferential direction of the insertion cylinder portion 61, and have a shape extending long in the axial direction of the insertion cylinder portion 61. The lower end of the protrusion 61a is located at the lower end of the insertion tube 61, while the upper end of the protrusion 61a is located downward from the upper end of the insertion tube 61.

As shown in FIG. 4, with the cap 60 attached to the connector main body 2, the protruding portion 61a of the cap 60 is arranged on the axially proximal end side of the connector main body 2 with respect to the engaging portion 20 of the connector main body 2. As described above, the positional relationship between the two is set. The tip side surface 61b located on the tip side of the connector main body 2 in the protruding portion 61a of the cap 60 is a surface that comes into contact with and engages with the engaging portion 20. The tip side surface 61b is formed so as to be located closer to the tip of the protruding portion 61a in the protruding direction toward the base end side (lower side) of the connector main body 2.

A plurality of covering portions 62 are provided, and project from the upper end portion of the insertion cylinder portion 61 in the radial direction (direction intersecting the axial direction of the connector body 2), and are spaced apart from each other in the circumferential direction of the insertion cylinder portion 61. It is placed open. Since the covering portions 62 are provided at intervals in the circumferential direction of the insertion cylinder portion 61, the tip end portion of the connector main body 2 is partially covered by the covering portion 62. The lower surface of the covering portion 62 is in contact with the tip end portion (upper end portion) of the connector main body 2. The lower surface of the cover portion 62 comes into contact with the tip end portion of the connector body 2, so that the cap 60 is positioned in the insertion direction.

The outer peripheral wall portion 63 extends continuously in the circumferential direction of the insertion cylinder portion 61 so as to connect the tip portions of the covering portion 62 in the protruding direction. The outer peripheral wall portion 62 projects downward from the tip portion of the covering portion 62 in the projecting direction. The inner diameter of the outer peripheral wall portion 63 is set to be larger than the outer diameter of the insertion cylinder portion 61, and the tip portion of the connector main body 2 is located between the inner peripheral surface of the outer peripheral wall portion 63 and the outer peripheral surface of the insertion cylinder portion 61. There is a gap in which it can be inserted.

The holder portion 64 projects radially outward from a part of the outer peripheral wall portion 63 in the circumferential direction, and then bends and extends in the circumferential direction. The cap 60 can be held in the tube by inserting a tube or the like (not shown) inside the holder portion 64. The holder portion 64 may be omitted.

(Cap installation procedure)
Next, a procedure for attaching the cap 60 configured as described above to the connector main body 2 will be described. First, after arranging the cap 60 above the connector main body 2, the insertion tube portion 61 of the cap 60 is inserted into the space R between the inner peripheral surface of the connector main body 2 and the outer peripheral surface of the connecting pipe portion 4. .. When the insertion cylinder portion 61 is inserted into the space R, the lower surface of the covering portion 62 comes into contact with the upper end portion of the connector main body 2, and the cap 60 does not move further to the lower side of the connector main body 2. That is, the covering portion 62 also functions as a stopper when attaching the cap 60.

In the process of inserting the insertion cylinder portion 61 into the space R, the lower end portion of the protruding portion 61a of the insertion cylinder portion 61 slides into contact with the upper surface 20a of the engaging portion 20 of the connector body 2, and at this time, the engaging portion 20 Since the upper surface 20a is located downward as it goes inward in the radial direction, the insertion tube 61 is guided to the center of the connector body 2 so that the axis of the insertion tube 61 and the axis of the connector body 2 coincide with each other. NS. When the insertion cylinder portion 61 is further inserted, the protruding portion 61a of the insertion cylinder portion 61 presses the engaging portion 20 radially outward, and the engaging portion 20 is radially outward with respect to the upper end portion of the elastic deformation portion 21. External force acts. The elastically deformed portion 21 that receives the external force is elastically deformed as a whole so that the upper end portion thereof is displaced outward in the radial direction. As a result, the engaging portion 20 is displaced outward in the radial direction, so that the protruding portion 61a of the insertion cylinder portion 61 can move downward.

As shown in FIG. 4, when the insertion cylinder portion 61 of the cap 60 is completely inserted into the connector main body 2, the engaging portion 20 is located above the protruding portion 61a of the insertion cylinder portion 61. As a result, the engaging portion 20 is displaced inward in the radial direction by the urging force of the elastically deformed portion 21 and returns to the original position, and the shape of the elastically deformed portion 21 is restored. In this state, the engaging portion 20 contacts and engages with the tip side surface 61b of the protruding portion 61a of the insertion cylinder portion 61.

In this embodiment, the engaging portion 20 is engaged with the protruding portion 61a of the insertion cylinder portion 61 instead of the conventional fitting. Therefore, for example, the atmospheric temperature changes during sterilization or storage, and each member changes. Even if thermal expansion or contraction occurs, the cap 60 is less likely to come off from the connector body 2.

(How to remove the cap)
Next, a procedure for removing the cap 60 attached as described above from the connector main body 2 will be described. The cap 60 is held by hand, and a force is applied in the direction of pulling out the insertion cylinder portion 61 from the connector main body 2. Then, since the tip side surface 61b of the protruding portion 61a is located closer to the base end side of the connector body 2 as it approaches the tip in the protruding direction, a force is applied in the direction of pulling out the insertion cylinder portion 61 of the cap 60 from the upper end portion of the connector body 2. The engaging portion 20 can be pushed by the tip side surface 61b of the protruding portion 61a in the protruding direction of the protruding portion 61a to elastically deform the elastically deformed portion 21 outward in the radial direction. As a result, the engaging portion 20 gets over the protruding portion 61a and is switched to the removable position. That is, the cap 60 can be removed only by pulling out the insertion cylinder portion 61 of the cap 60 from the upper end portion of the connector main body 2 without operating the elastic deformation portion 21 by the operation portion 25.

When removing the cap 60, the elastic deformation portion 21 may be operated by the operation portion 25. That is, an external force is applied to the elastically deformed portion 21 by the operating portion 25 to elastically deform the elastically deformed portion 21 toward the outside in the radial direction of the connector main body 2, and then the insertion cylinder portion 61 of the cap 60 is inserted into the upper end of the connector main body 2. It can be pulled out from the part.

As described above, since the engaging portion 20 is provided in the elastically deformed portion 21, the elastically deformed portion 21 is engaged by elastically deforming the elastically deformed portion 21 by directly or indirectly applying an external force to the elastically deformed portion 21. The portion 20 can be displaced from the position where it engages with the cap 60 to the removable position of the cap 60.

(How to connect to the infusion bag)
When connecting the connector 1 to the second infusion bag 103, as shown in FIG. 2, the connecting pipe portion 4 of the connector 1 is pierced into the plug member 124 of the bag adapter 120, and the bag is attached in the same manner as when the cap 60 is attached. The outer cylinder portion 123 of the adapter 120 is inserted into the space R formed between the outer peripheral surface of the connecting pipe portion 4 and the inner peripheral surface of the connector main body 2. As a result, the engaging portion 20 is pressed outward in the radial direction by the lower end portion of the outer cylinder portion 123, and the elastically deformed portion 21 is elastically deformed toward the outer side in the radial direction, so that the outer cylinder portion 123 can be inserted. When the outer cylinder portion 123 is completely inserted, the engaging portion 20 enters the recess 123a of the outer cylinder portion 123 and becomes engaged.

(How to connect to a vial)
As shown in FIG. 8, the connector 1 can also be connected to the vial bottle (container) 130. A rubber stopper member 131 is attached to the opening of the vial 130. A vial bottle adapter 140 is detachably attached to the vial bottle 130. The vial bottle adapter 140 includes a claw 141 that engages with the outer peripheral surface of the vial bottle 130, and a needle 142 that can pierce the stopper member 131. The needle 142 is a hollow needle and is arranged so as to project upward in this embodiment. By piercing the stopper member 131 with the needle 142, the inside of the vial 130 and the inside of the needle 142 are in communication with each other.

An outer cylinder portion 143 is formed so as to project downward at the lower portion of the vial bottle adapter 140. The inside of the outer cylinder portion 143 communicates with the inside of the needle 142. A rubber stopper member 144 is provided at the lower end of the outer cylinder portion 143. A recess 143a is formed on the outer peripheral surface of the outer cylinder portion 143 on the upper side of the plug member 144. The recess 143a can be continuously provided in the circumferential direction of the outer cylinder portion 143.

When connecting the connector 1 to the vial 130, the connecting pipe portion 4 of the connector 1 is pierced into the stopper member 144 of the vial adapter 140, and the outside of the vial adapter 140 is the same as when the cap 60 is attached. The tubular portion 143 is inserted into the space R formed between the outer peripheral surface of the connecting pipe portion 4 and the inner peripheral surface of the connector main body 2. As a result, the engaging portion 20 is pressed outward in the radial direction by the lower end portion of the outer cylinder portion 143, and the elastically deformed portion 21 is elastically deformed toward the outer side in the radial direction, so that the outer cylinder portion 143 can be inserted. When the outer cylinder portion 143 is completely inserted, the engaging portion 20 enters the recess 143a of the outer cylinder portion 143 and is in a state of being engaged.

(Action and effect of the embodiment)
As described above, according to the connector 1 with a cap according to this embodiment, the connector main body 2 is provided with an engaging portion 20 that engages with the cap 60, and the engaging portion 20 is engaged with the cap 60. Since it can be displaced from the cap to the removable position of the cap, it is possible to prevent the cap 60 from falling off from the connector 1 without deteriorating the workability when attaching and detaching the cap 60 to and from the connector 1. The part 4 can be kept clean.

The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Furthermore, all modifications and modifications that fall within the equivalent scope of the claims are within the scope of the present invention.

As described above, the connector with a cap according to the present invention can be used by connecting to, for example, an infusion bag or a vial.

1 Connector with cap 2 Connector body 4 Connection pipe part 20 Engagement part 21 Elastic deformation part 22 First slit 23 Second slit 24 Upper slit 25 Operation part 60 Cap 61 Insertion cylinder part 61a Protruding part 61b Tip side

Claims (7)

The connection pipe part connected to the container containing the chemical solution,
It is provided with a tubular connector body provided so as to surround the periphery of the connection pipe portion.
In a connector with a cap to which a cap covering the connection pipe portion is attached to the tip of the connector body.
The connector body has an engaging portion that engages with the cap and a removable position that allows the cap to be removed from the connector body from an engaging position that engages the cap. An elastic deformation part to be displaced is provided ,
The elastically deformed portion extends in the axial direction of the connector body, and the axial base end portion of the connector body in the elastically deformed portion is connected to the connector body, while the shaft of the connector body in the elastically deformed portion. The tip in the direction is the free end,
A connector with a cap, characterized in that the engaging portion is provided at the free end portion of the elastically deformed portion. In the connector with a cap according to claim 1,
A part of the connector body in the circumferential direction is the elastically deformed part.
A connector with a cap, characterized in that a slit is formed between the elastically deformed portion of the connector body and another portion. In the connector with a cap according to claim 2.
The cap has an insertion cylinder portion that is inserted into the connector body, and a protrusion portion that protrudes outward in the radial direction is formed on the outer peripheral surface of the insertion cylinder portion.
The engaging portion is arranged so as to engage with the protruding portion.
The elastically deformed portion is a connector with a cap characterized in that the free end portion is elastically deformed so as to be displaced in the radial direction of the connector body. In the connector with a cap according to claim 3,
A connector with a cap, characterized in that the elastically deformed portion is provided with an operating portion for operating the elastically deformed portion so as to project outward in the radial direction of the connector body. In the connector with a cap according to claim 3,
With the cap attached to the connector body, the protruding portion of the cap is arranged on the axially proximal end side of the connector body with respect to the engaging portion.
The front end side surface of the protruding portion located on the tip end side of the connector body is a surface that contacts and engages with the engaging portion.
A connector with a cap, wherein the front end side surface is formed so as to be located closer to the base end side of the connector main body as it approaches the protrusion direction tip of the protrusion. In the connector with a cap according to any one of claims 3 to 5.
The cap extends in a direction intersecting the axial direction of the connector body and has a covering portion that covers the tip end portion of the connector body.
A connector with a cap, wherein the covering portion abuts on the tip end portion of the connector body. The connection pipe part connected to the container containing the chemical solution,
It is provided with a tubular connector body provided so as to surround the periphery of the connection pipe portion.
In a connector with a cap to which a cap covering the connection pipe portion is attached to the tip of the connector body.
The connector body has an engaging portion that engages with the cap and a removable position that allows the cap to be removed from the connector body from an engaging position that engages the cap. An elastic deformation part to be displaced is provided,
A part of the connector body in the circumferential direction is the elastically deformed part.
A slit is formed between the elastically deformed portion of the connector body and the other portion.
The elastically deformed portion is formed in a plate shape extending in the axial direction of the connector body, and the axial base end portion of the connector body in the elastically deformed portion is connected to the connector body, while the connector in the elastically deformed portion. The axial tip of the body is the free end,
A connector with a cap, characterized in that the engaging portion is provided at the free end portion of the elastically deformed portion.

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