JP4475918B2 - Connector - Google Patents

Description

  The present invention relates to a connector that can connect tubes and allows liquid to pass therethrough.

  In a medical device that requires connection of a liquid channel used for infusion, blood transfusion, nutrient administration, etc., when a liquid (fluid) such as a drug solution, blood, or liquid food is continuously and temporarily flowed, the liquid channel ( Circuit) must be connected and disconnected as necessary. At this time, it is known to attach a connector for connecting liquid flow paths in the middle of the circuit.

  A typical example of such a connection tool is a three-way cock. This three-way cock is composed of one male connection part and two female connection parts. When a circuit is formed using a plurality of three-way cocks, the circuit is connected (formed) by fitting one male connection part and the other female connection part.

  However, when the connected connectors are detached from each other, there is a possibility that a portion serving as a flow path may be exposed to the outside air. Therefore, such a connector has a drawback that it is vulnerable to bacterial contamination. In particular, the female connection portion has a problem in that it is frequently used by being repeatedly connected and disconnected, and has a high frequency of being exposed (exposed) to the outside air.

  For such a problem, there is a connector provided with a valve body capable of opening and closing the flow path in the female connection part so as to suppress exposure of the part that becomes the flow path of the female connection part to the outside air (for example, Patent Document 1). This connector is used to pierce the valve body with a needle or insert a male connection portion into a valve body with a slit to open the flow path. The body closes and exposure of the flow path to the outside air can be suppressed.

  However, in such a connector, the valve body is not installed only on one female connection, and when the other male connection is removed from this female connection, the female connection is exposed to the outside air. There was a problem to do.

  Moreover, such a connection tool tends to generate a staying part where the liquid stays in the female connection part. As a result, there is a problem that the required amount of liquid is difficult to flow and the flow path is easily contaminated by the bacteria that have propagated in the staying portion. Moreover, when filling and using the inside of a connection tool (flow path) with a liquid before use, there existed a problem that it was difficult to remove the gas in a connection tool beforehand.

  In addition, when connecting or disconnecting a tube body such as a catheter to or from such a connection tool, there is a problem that the internal volume in the connection tool easily changes. For example, when the other catheter connected from the connection tool to which the blood vessel catheter through which blood passes is connected is removed, the internal volume in the connection tool increases. This causes blood from the vascular catheter to flow backward, causing the vascular catheter to close.

JP-A-9-108361 Japanese Patent Publication No. 5-32071

  An object of the present invention is to provide a connection tool that allows a liquid to pass through when necessary and allows a liquid to pass therethrough and is less likely to cause a staying portion where the liquid stays.

These objects, Ru is achieved by the following aspects of the invention (1) to (6).

(1) A connecting device to which a tubular body can be connected and through which a liquid passes,
A housing having a substantially cylindrical columnar space into which the tubular body can be inserted, and a liquid circulation space formed continuously on the side of the cylindrical space;
It is made of an elastic material, has a head portion and a trunk portion, has a cylindrical shape as a whole, is stored in the cylindrical space, and has a first position and a second position on the far side from the first position. And a movable valve body,
Biasing means for biasing the valve body so as to move from the second position to the first position;
A tubular male-side connecting portion that is installed in the housing, communicates with the liquid circulation space, and has a liquid flow path through which the liquid passes;
The head has a top surface slit that reaches the top surface from the inside and a side surface slit that reaches the side surface from the inside,
The housing has a tapered portion formed such that a part of the inner diameter of the cylindrical space gradually decreases from the first position toward the second position, and in the vicinity of the tapered portion, The cross-sectional shape of the inner diameter of the cylindrical space has an elliptical shape that decreases in the direction of opening the top slit,
When the tube body is not connected, the valve body is located at the first position, and the outer peripheral surface of the body portion prevents the liquid from flowing from the liquid circulation space to the cylindrical space. In the first state,
When the tubular body is inserted into the cylindrical space, the tubular body presses the top surface of the valve body in the axial direction, so that the valve body moves from the first position to the second position. Then, the side slit is located on the side of the liquid circulation space and opens, and the vicinity of the top surface of the valve body is compressed in the radial direction, and the top surface is opened by the deformation of the head , The top slit becomes a second state communicating with the liquid flow path via the side slit and the liquid circulation space,
When the tubular body is removed from the columnar space, the connector returns to the first state.

( 2 ) comprising two sets of the valve body and the columnar space sharing the liquid circulation space;
The connecting device according to (1) , wherein the two sets of the valve body and the columnar space are arranged such that their center lines are in a twisted positional relationship with each other.

( 3 ) The connection tool according to (1) or (2) , wherein the volume of the liquid circulation space is substantially constant in the first state and the second state.

( 4 ) Each of the top surface slit and the side surface slit has a substantially single character shape, and is formed in parallel with the axial direction of the valve body,
The connector according to any one of (1) to (3) , wherein the top surface slit and the side surface slit intersect each other inside the valve body.

( 5 ) The connection device according to any one of (1) to (4) , wherein the urging unit includes a deformable portion that is formed integrally with the valve body and elastically deforms.

( 6 ) The connector according to any one of (1) to (5) , wherein the liquid circulation space has a shape that prevents the liquid from staying as much as possible when the liquid passes through.

  According to the connection tool of the present invention, when the pipe body is not connected, the valve block prevents the liquid from passing, and when the pipe body is connected, the top surface slit and the side slit open and the liquid passes. Can do.

  Further, according to the connection tool of the present invention, when the liquid passes, it is possible to make it difficult for the liquid to stay.

Hereinafter, the connector of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.
FIG. 1 is a perspective view showing an embodiment of the connector of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIGS. 3 and 4 are each a tube body connected to the connector. 1 is a cross-sectional view taken along line AA in FIG. 1 in a state, FIG. 5 is a cross-sectional view taken along line BB in FIG. 1, and FIGS. 6 and 7 are views of FIG. FIG. 8 and FIG. 9 are respectively perspective views of the valve body included in the connector shown in FIG. 1. 8 and 9, the upper side is referred to as "tip", and the lower side is referred to as "base end".

  The connecting tool 1 of the present invention shown in FIG. 1 can connect the pipe bodies 20A and 20B, and the liquid passes through the inside. The connector 1 includes a housing 6 and two valve bodies 2A and 2B housed in the housing 6. Hereinafter, the configuration of each unit will be described. Hereinafter, a state in which the tube body 20A (the tube body 20B is the same) is not connected to the connection tool 1 is referred to as a “non-connection state”, and as shown in FIGS. 3, 4, and 7, the tube body 20A ( A state in which the tube body 20B is also connected to the connector 1 is referred to as a “connected state”.

  First, the tubular bodies 20A and 20B will be described. Note that the tubular bodies 20A and 20B have substantially the same shape and action, and therefore, the tubular body 20A will be representatively described below.

  As shown in FIGS. 3 and 4, the tube body 20 </ b> A is a part or instrument connected to the connection tool 1. As the tubular body 20A, for example, a proximal end projecting portion (a portion to which a needle tube is connected) of a syringe (injector), or a tubular instrument such as a hub or sheath independent of each other can be cited.

  The tube body 20A has a lumen (flow path) 202, and the outer peripheral surface thereof has a luer taper shape. That is, the outer diameter of the tubular body 20A is slightly smaller than the inner diameter of the opening 912 of caps (female side connecting portions) 9A and 9B, which will be described later, on the opening 201 side, and gradually increases in the direction opposite to the opening 201 side. It has a tapered shape.

  A female luer lock portion 30 is provided on the outer peripheral side of the tubular body 20A. A female screw 301 is formed on the inner peripheral surface of the female luer lock portion 30.

Next, the housing 6 will be described.
As shown in FIG. 1, the housing 6 includes a base 7 having a substantially cubic shape, and caps (female side connecting portions) 9 </ b> A and 9 </ b> B installed (fixed) on the base 7.

  The caps 9 </ b> A and 9 </ b> B each have a cylindrical shape, and are fixed to two adjacent surfaces of the base 7. The fixing method is not particularly limited, and may be, for example, a method such as engagement, fitting, caulking, adhesion using an adhesive, thermal fusion, ultrasonic fusion, or the like.

  As shown in FIG. 2 and FIG. 5, the housing 6 includes two substantially cylindrical columnar spaces 61 </ b> A and 61 </ b> B into which the tubular bodies 20 </ b> A and 20 </ b> B can be inserted, and a liquid circulation space 62 through which liquid passes. Is formed.

  The columnar spaces 61A and 61B are formed in parallel with the axial directions of the caps 9A and 9B across the cap 9A or 9B and the base 7, respectively.

  The liquid circulation space 62 is continuously formed on the side of the cylindrical spaces 61A and 61B. That is, the columnar space 61 </ b> A and the columnar space 61 </ b> B communicate with each other through the liquid circulation space 62.

  As shown in FIGS. 3 and 7, each of the caps 9A and 9B has a fitting portion 914 that fits the tubular bodies 20A and 20B in a connected state in the vicinity of the opening 912 thereof. The fitting portion 914 is formed so that the inner diameter of the cylindrical space 61A becomes smaller in the vicinity of the opening 912 (the same applies to the cylindrical space 61B).

  Thereby, each of the pipe bodies 20A and 20B can be prevented from being inserted into the connector 1 more than necessary. Moreover, each of the tubular bodies 20A and 20B can be fixed.

  A male screw 913 is formed on the outer peripheral portion of the cap 9A on the opening 912 side. In the connected state, the male screw 913 is screwed into the female screw 301 of the female luer lock portion 30 (the same applies to the cap 9B).

  As shown in FIG. 5, a tubular male side connection portion 8 is installed on the surface opposite to the surface of the base 7 (housing 6) where the cap 9B is installed so as to be perpendicular to the surface. The male side connection portion 8 includes a liquid flow path 81 through which liquid passes and a luer taper portion 83.

  The liquid flow path 81 communicates with the liquid circulation space 62 and is formed substantially parallel to the cylindrical space 61B.

  The luer taper portion 83 is formed on the outer peripheral portion of the male side connection portion 8 on the opening portion 82 side so that the outer diameter gradually decreases in the direction of the opening portion 82. In addition, although the male side connection part 8 is integrally formed in the base 7 in the structure of illustration, it is not limited to this, The base 7 may be formed with another member.

  The constituent material of such a base 7 (including the male side connection portion 8) and the cap 9A (same for the cap 9B) is not particularly limited. For example, various resin materials such as polyethylene, polypropylene, and polycarbonate, and other various glass materials. It can also be made of a ceramic material or a metal material.

  Next, the valve bodies 2A and 2B will be described. In addition, since the valve bodies 2A and 2B are substantially the same in shape and action, the valve body 2A will be described below representatively.

  As shown in FIGS. 8 and 9, the valve body 2 </ b> A has a columnar head 21 and a substantially columnar body 22 provided on the base end side of the head 21, and is made of an elastic material. Has been. In other words, the valve body 2A has a substantially cylindrical shape as an overall shape. 8 shows a state in which a later-described top surface slit 212 and side surface slit 214 formed in the valve bodies 2A and 2B are closed, and FIG. 9 shows a state in which both slits are opened.

  The head 21 is formed with a top slit 212 that reaches the top 211 from the inside, and a side slit 214 that similarly reaches the side 213 from the inside.

  Each of the top surface slit 212 and the side surface slit 214 has a substantially single character shape and is formed in the axial direction of the valve body 2A. Both slits intersect each other in the valve body 2A (head 21) ( Communication). That is, the respective opening ports 212a and 214a of the top surface slit 212 and the side surface slit 214 are in a twisted positional relationship with each other.

  With such a configuration, for example, the liquid flowing in from the top surface slit 212 can flow out from the side surface slit 214.

  The top slit 212 and the side slit 214 are closed by the elasticity of the head 21 itself when the valve body 2A is in a natural state (a state where the head 21 is not pressed by the tubular body 20A, that is, a disconnected state). Thus, the liquid-tight state (air-tight state) is maintained (see FIG. 8).

  On the other hand, when an external force is applied to the valve body 2A, the head 21 is deformed and both slits are opened. That is, when the head 21 is pressed in the axial direction (the directions of arrows V and V ′ in FIG. 9), the head 21 is deformed and the side slit 214 (opening opening 214a) is opened (opened). When 21 near the top surface 211 is compressed in the radial direction (the directions of arrows H and H ′ in FIG. 9), the head 21 is deformed and the top surface slit 212 (opening port 212a) is opened (FIG. 9). reference).

  As shown in FIGS. 8 and 9, the valve body 2A is provided with a deforming portion (biasing means) 23 formed integrally therewith.

  The deformation portion 23 is provided on the proximal end side of the body portion 22, and a groove 233 is formed along the entire circumference on the outer peripheral surface of the deformation portion 23 so as to be elastically deformed in the axial direction of the valve body 2 </ b> A. The deforming portion 23 functions as a biasing unit that biases the valve body 2A from the proximal end side toward the distal end side.

  With such a deforming portion 23, it is not necessary to separately provide the connector 1 with a component for configuring the biasing means, which can contribute to a reduction in the number of components and simplification of the structure.

  In addition, the deformed portion 23 has such a shape. In particular, by appropriately setting the depth, width, number of formed grooves 233, etc., an appropriate amount of deformation can be achieved.

  Similarly, the deforming portion 23 is more flexible than the body portion 22 and can be easily deformed from the body portion 22.

  In addition, although this deformation | transformation part 23 bears most of the restoring force which 2A of valve bodies restore | restore toward the front end side from the base end side, the trunk | drum 22 may bear a part of the restoring force. .

  The elastic material constituting the valve bodies 2A and 2B (including the deformed portion 23) is not particularly limited. For example, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, ethylene-propylene rubber, Examples include various rubber materials such as silicone rubber, and various thermoplastic elastomers such as styrene, polyolefin, polyester, polyamide, polybutadiene, trans polyisoprene, fluoro rubber, and chlorinated polyethylene. One or two or more of them can be used in combination.

  As shown in FIGS. 1, 2, and 5, the connector 1 having each part configured as described above has valve bodies 2 </ b> A and 2 </ b> B accommodated in cylindrical spaces 61 </ b> A and 61 </ b> B of the housing 6, respectively. Such valve bodies 2A and 2B can move the cylindrical spaces 61A and 61B to a first position described later and a second position on the back side from the first position, respectively.

  In this connector 1, the set of the valve body 2A and the columnar space 61A and the set of the valve body 2B and the columnar space 61B share the liquid circulation space 62. That is, each set is adjacent to each other through the liquid circulation space 62. And each group is arrange | positioned so that those centerlines may mutually make the positional relationship of a twist.

  With such a configuration, the size of the liquid circulation space 62 formed in the housing 6 (base 7) can be reduced. Thereby, when the liquid passes through the connection tool 1, it is possible to more reliably prevent the liquid from staying.

  Similarly, when the liquid passes through the connector 1, the liquid can be sent (flowed) from two different directions to the male side connecting portion 8, or the liquid from the male side connecting portion 8 can be branched into two different directions. You can make it.

Next, the connection tool 1 in a non-connected state will be described.
In the unconnected state, the valve bodies 2A and 2B are in the first position as shown in FIGS. In the first position, the top surfaces 211 of the valve bodies 2A and 2B are in the vicinity of the opening 912 of the caps 9A and 9B (columnar spaces 61A and 61B), respectively. At this time, the top surface slit 212 and the side surface slit 214 of both valve bodies are closed. At the same time, in the connector 1, the outer peripheral surfaces 221 of the body portions 22 of both valve bodies are positioned on the sides of the liquid circulation space 62, that is, the liquid circulation space 62 is surrounded by the two outer peripheral surfaces 221. As a result, the liquid does not flow from the liquid circulation space 62 to the cylindrical spaces 61A and 61B.

Hereinafter, such a state of the connection tool 1 in the unconnected state is referred to as a “first state”.
Next, the connection tool 1 in the connected state will be described.
First, the case where the tubular body 20A is connected to the cap 9A (the tubular body 20A is inserted into the cylindrical space 61A) will be described.

  When the tubular body 20A is connected to the cap 9A, as shown in FIG. 3, the female thread 301 of the female luer lock 30 and the male thread 913 of the cap 9A are screwed together, and the tubular body 20A inserted into the cylindrical space 61A. Presses the top surface 211 of the valve body 2A in the axial direction. At this time, the end surface of the tube body 20A where the opening 201 is formed and the top surface 211 of the valve body 2A are in close contact with each other, thereby preventing the passing liquid from leaking.

Due to such pressing, the valve body 2A (head 21) moves from the first position to the inner side of the cylindrical space 61A. At this time, the valve body 2A is in the second position as shown in FIG. In the second position, the side slit 214 is on the side of the liquid circulation space 62. That is, the opening 214a of the side slit 214 is at a position where it can be opened to the liquid circulation space 62 (see FIGS . 3 and 7 ). At the same time, as described above, the head 21 is deformed and the side slit 214 (opening opening 214a) is opened (opened).

  In the movement of the valve body 2A between the first position and the second position, the location of the valve body 2A where the movement amount of the valve body 2A is the largest is the top surface 211, and from there to the deformed portion 23 side. The amount of movement gradually decreases as it goes, but the valve body 2A itself moves uniformly as a whole.

  The housing 6 has a tapered portion 611 in which a taper is formed such that a part of the inner diameter of the cylindrical space 61A gradually decreases from the first position toward the second position. In the vicinity of the tapered portion 611, the cylindrical space 61 </ b> A (same as the cylindrical space 61 </ b> B) has a shape in which the cross-sectional shape of the inner diameter decreases in the direction in which the top slit 212 is opened, that is, an elliptical shape (oval shape). Yes. By the taper portion 611, the head portion 21 is compressed in the vicinity of the top surface 211 in one character direction of the top surface slit 212 (in the directions of arrows H and H ′ in FIG. 9), the head portion 21 is deformed, and the top surface The slit 212 (opening opening 212a) opens (opens).

  At this time, in the connection tool 1, the top surface slit 212 and the side surface slit 214 communicate with each other inside the valve body 2 </ b> A, and the side surface slit 214 communicates with the liquid circulation space 62. That is, the open top surface slit 212 communicates with the liquid flow path 81 through the open side slit 214 and the liquid circulation space 62.

Hereinafter, such a state of the connection tool 1 in the connected state is referred to as a “second state”.
In the connection device 1 in the second state in which the tube body 20A is connected to the cap 9A, for example, when a liquid flows into the connection device 1 from the tube body 20A, the liquid does not stay in the liquid circulation space 62. The top slit 212, the side slit 214, the liquid circulation space 62, and the liquid channel 81 are passed through the respective parts in this order.

  When the tubular body 20B is connected to the cap 9B (the tubular body 20B is inserted into the cylindrical space 61B), the connector 1 has a configuration as shown in FIG. Since the function and action of the valve body 2B and its surrounding parts at this time are substantially the same as when the tubular body 20A is connected to the cap 9A, the description thereof is omitted.

  Next, the case where the pipe bodies 20A and 20B are connected to the caps 9A and 9B will be described.

  As shown in FIGS. 4 and 7, the connecting tool 1 connected to the pipes 20A and 20B communicates from each of the pipes 20A and 20B to the liquid flow path 81 of the male side connection portion 8, for example, a pipe When the liquid is poured from the bodies 20 </ b> A and 20 </ b> B into the connection tool 1, the liquid passing through the connection tool 1 merges in the liquid circulation space 62 and passes through the liquid channel 81.

  With such a configuration, when the liquid flows inside the connector 1 (particularly, the liquid circulation space 62), the liquid circulation space 62 has a shape that prevents the liquid from staying as much as possible.

  Thereby, the dead space formed in the liquid circulation space 62 is small, and the liquid can be prevented from staying in the liquid circulation space 62. Further, even when the inside of the connector 1 is filled with a gas in advance, when the inside is replaced with a liquid, it is possible to prevent the gas from remaining (residing) in the inside.

  Next, the connection tool 1 when the tube body 20A (tubing body 20B) is removed from the connection tool 1, that is, when the connection tool 1 is returned to the non-connected state will be described. Note that the case where the tube body 20A is removed from the cap 9A and the case where the tube body 20B is removed from the cap 9B are substantially the same as the operation of the connector 1, and therefore, the case where the tube body 20A is removed from the cap 9A is representative. I will explain it.

  As shown in FIG. 2, the screwing of the female thread 301 of the female luer lock part 30 and the male thread 913 of the cap 9A is released, and the tube body 20A is removed from the cylindrical space 61A, thereby the head of the valve body 2A. 21 (top surface 211) is released from pressing the tubular body 20A. Thereby, the deformation | transformation part 23 is decompress | restored, the head 21 (valve body 2A) returns from a 2nd position to a 1st position, and the top surface slit 212 and the side surface slit 214 close (close | close). At the same time, the outer peripheral surface 221 of the body portion 22 prevents the liquid from passing between the liquid circulation space 62 and the cylindrical space 61A. That is, the connection tool 1 returns to the first state.

  In addition, as shown in FIG. 2, the connector 1 has a recess 231 formed in the deformable portion 23 in a direction in which the deformable portion 23 is elastically deformed, and a hole through which the inside and the outside communicate with the housing 6 (base 7). 63 is formed.

  The concave portion 231 has a substantially cylindrical shape, and is formed on the base end surface 232 of the deformable portion 23.

  Two holes 63 are formed in the housing 6 and are formed on the surface opposite to the surface to which the caps 9A and 9B are fixed (see FIGS. 2 and 5).

  The connecting tool 1 is configured such that the inside of the recess 231 communicates with the outside of the housing 6 through the hole 63.

  Due to the concave portion 231 and the hole 63, the deformable portion 23 can be easily elastically deformed. Further, since gas (air) can pass (circulate) in the cylindrical space 61A, the valve body 2A can easily move in the cylindrical space 61A (the same applies to the valve body 2B).

  The connector 1 is configured so that the volume of the liquid circulation space 62 is substantially constant in each of the first state and the second state.

  Thereby, it can prevent that the content volume of the liquid which passes the inside of the connector 1 changes. For example, when the other catheter connected to the vascular catheter through which blood passes is detached, it is possible to prevent the internal volume in the connector 1 from increasing, The backflow of blood from the vascular catheter can be prevented.

  With such a configuration, the connector 1 can appropriately open and close the top surface slit 212 and the side surface slit 214 of the valve bodies 2A and 2B when necessary. Thereby, when connection and removal of the tube 20A (tube body 20B) to and from the connection tool 1 are repeated, the inside of the connection tool 1 is prevented from being exposed to the outside air, and the inside is mainly contaminated with bacteria from the outside air. Can be prevented.

  Moreover, the valve bodies 2A and 2B can be independently operated (used) by the same configuration. That is, the flow path of the liquid in the connector 1 to which the tube is connected communicates, and a part of the flow path of the liquid in the connector 1 to which the tube is not connected is blocked. .

  The inner diameter of the opening 912 is preferably the same as or smaller than the outer diameter of the head 21. Thereby, in the non-connected state, the head 21 is compressed in the radial direction, and the top surface slit 212 can be closed more reliably.

  Further, the respective opening openings 212a and 214a of the top surface slit 212 and the side surface slit 214 are not limited to the twisted positional relationship. For example, the forming direction of the opening surface 212a of the top surface slit 212 and the opening opening of the side surface slit 214 The positional relationship may be such that the formation direction of 214a is substantially parallel. It is excluded that the side slit 214 is formed (provided) so as to be substantially perpendicular to the central axis of the head 21.

  Moreover, the deformation | transformation part 23 is not limited to the groove | channel 233 being formed in the outer peripheral surface, For example, the shape may have comprised the bellows shape.

  As mentioned above, although the connection tool of the present invention has been described with respect to the illustrated embodiment, the present invention is not limited to this, and each part constituting the connection tool has any structure that can exhibit the same function. Can be substituted. Moreover, arbitrary components may be added.

For example, it may be configured to prevent the valve body from rotating about its axis.
The top surface slit and the side surface slit are not limited to a single character, but may be a cross, L, H, U, Y, or a plurality of them. It may be a stack.

  Further, the top surface slit and the side surface slit are not limited to being substantially the same shape as each other, and may have, for example, a slit shape as described above so that the shapes are different from each other.

  Further, the biasing means is not limited to being integrally formed with the valve body. For example, the valve body may be biased by a coil spring.

  Further, the two sets of valve bodies and the cylindrical space are not limited to being arranged such that the center lines are in a twisted positional relationship with each other, for example, so that the center lines are in a parallel positional relationship with each other. May be arranged.

  Further, as in the above-described embodiment, the two valve bodies are not limited to valve bodies having substantially the same function and action, and may be valve bodies having different functions and actions.

  In addition, when the connection tool includes two valve bodies as in each of the above embodiments, the connection tool has one of the two valve bodies connected to the pipe body depending on the application. It may be possible to connect only to each other, or it may be possible to connect to both valve bodies.

It is a perspective view which shows embodiment of the connection tool of this invention. It is the sectional view on the AA line in FIG. It is the sectional view on the AA line in FIG. 1 in the state in which the pipe body was connected to the connection tool. It is the sectional view on the AA line in FIG. 1 in the state in which the pipe body was connected to the connection tool. It is the BB sectional view taken on the line in FIG. It is the BB sectional view taken on the line in FIG. 1 in the state in which the tubular body was connected to the connection tool. It is the BB sectional view taken on the line in FIG. 1 in the state in which the tubular body was connected to the connection tool. It is a perspective view of the valve body with which the connecting tool shown in FIG. 1 is provided. It is a perspective view of the valve body with which the connecting tool shown in FIG. 1 is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connector 2A Valve body 2B Valve body 21 Head 211 Top surface 212 Top surface slit 212a Open port 213 Side surface 214 Side surface slit 214a Open port 22 Body 221 Outer surface 23 Deformation part 231 Recess 232 Base end surface 233 Groove 6 Housing 61A Circle Columnar space 61B Columnar space 611 Tapered portion 62 Liquid flow space 63 Hole 7 Base 8 Male side connection portion 81 Liquid flow path 82 Opening portion 83 Luer taper portion 9A Cap 9B Cap 912 Opening portion 913 Male screw 914 Fitting portion 20A Tube 20B Tubular body 201 Opening part 202 Lumen 30 Female luer lock part 301 Female screw

Claims (6)

A connecting device to which a pipe body can be connected and a liquid passes inside,
A housing having a substantially cylindrical columnar space into which the tubular body can be inserted, and a liquid circulation space formed continuously on the side of the cylindrical space;
It is made of an elastic material, has a head portion and a trunk portion, has a cylindrical shape as a whole, is stored in the cylindrical space, and has a first position and a second position on the far side from the first position. And a movable valve body,
Biasing means for biasing the valve body so as to move from the second position to the first position;
A tubular male-side connecting portion that is installed in the housing, communicates with the liquid circulation space, and has a liquid flow path through which the liquid passes;
The head has a top surface slit that reaches the top surface from the inside and a side surface slit that reaches the side surface from the inside,
The housing has a tapered portion formed such that a part of the inner diameter of the cylindrical space gradually decreases from the first position toward the second position, and in the vicinity of the tapered portion, The cross-sectional shape of the inner diameter of the cylindrical space has an elliptical shape that decreases in the direction of opening the top slit,
When the tube body is not connected, the valve body is located at the first position, and the outer peripheral surface of the body portion prevents the liquid from flowing from the liquid circulation space to the cylindrical space. In the first state,
When the tubular body is inserted into the cylindrical space, the tubular body presses the top surface of the valve body in the axial direction, so that the valve body moves from the first position to the second position. Then, the side slit is located on the side of the liquid circulation space and opens, and the vicinity of the top surface of the valve body is compressed in the radial direction, and the top surface is opened by the deformation of the head , The top slit becomes a second state communicating with the liquid flow path via the side slit and the liquid circulation space,
When the tubular body is removed from the columnar space, the connector returns to the first state. Comprising two sets of the valve body and the cylindrical space sharing the liquid circulation space;
2. The connector according to claim 1 , wherein the two sets of the valve body and the columnar space are arranged such that their center lines form a twisted positional relationship with each other. The connection tool according to claim 1 or 2 , wherein a volume of the liquid circulation space is substantially constant in the first state and the second state. Each of the top surface slit and the side surface slit has a substantially single character shape, and is formed in parallel with the axial direction of the valve body,
The connection tool according to any one of claims 1 to 3 , wherein the top surface slit and the side surface slit intersect each other inside the valve body. The connection tool according to any one of claims 1 to 4 , wherein the urging means includes a deformable portion that is formed integrally with the valve body and is elastically deformed. The connector according to claim 1 , wherein the liquid circulation space has a shape that prevents the liquid from staying as much as possible when the liquid passes.

Images