JP6376735B2 - Medical connection device - Google Patents

Description

  The present invention relates to a medical connection device used when connecting a medical tube to another tube, a medical device, or a human body.

  Generally, this type of connection device has a device body as described in Patent Document 1 below. The apparatus main body is formed with a connection hole into which a medical tube is inserted. Inside this connection hole, a seal member and an engagement member are provided. When the tube is inserted into the connection hole, the seal member seals between the inner peripheral surface of the connection hole and the outer peripheral surface of the tube. Further, the engaging member engages with the tube. Thereby, the tube body is prevented from coming off from the connection hole.

JP 2007-209390 A

  The tubular member is prevented from coming off by the engaging member as follows. That is, the engaging member has a ring shape, and a biting tooth that is inclined so as to go radially inward as it goes forward in the insertion direction of the tubular body is formed on the inner peripheral portion thereof. Each biting tooth is elastically deformed so that the inner diameter of the inscribed circle in contact with the tip of each biting tooth becomes large when inserting the pipe body, allowing insertion of the pipe body. Then, it deform | transforms so that an inscribed circle may become small and bites into the outer peripheral part of a tubular body. For this reason, once the tube body is inserted into the connection hole, the tube body cannot be pulled out, and there is a problem that the entire connection device must be discarded together with the tube body.

In order to solve the above-mentioned problem, the present invention has a connection hole, a medical tube is inserted into the connection hole from one end opening thereof, and is formed in a ring shape. An engagement member provided in a state in which the tube body is prevented from coming off in a direction opposite to the insertion direction of the tube body, and the inner circumferential portion of the engagement member has a diameter toward the front in the insertion direction of the tube body. When the plurality of biting teeth inclined to the inner side in the direction are formed and the tube body inserted into the connection hole in a state of penetrating the engagement member is moved in the direction opposite to the insertion direction, the biting teeth Biting into the outer periphery of the tubular body, whereby the tubular body is prevented from coming off from the connection hole. In the medical device main body, an engagement release member is provided at the standby position and the pipe from the standby position. The release position that is in front of the body insertion direction The one end opening of the connection hole is provided between the inner peripheral surface of the connection hole and the outer peripheral surface of the tube. A release portion that can be inserted from the pipe is provided, and the release portion allows the tube body to be inserted into the connection hole when the engagement release member is located at the standby position. When the release member is moved from the standby position to the release position, it comes into contact with the biting teeth and is separated from the tube body radially outward, so that the tube body can come out of the connection hole. It is characterized by doing.
In this case, the disengagement member is extrapolated to the outer peripheral portion of the apparatus main body so as to be movable between the standby position and the release position, and one end on the standby position side extends from the apparatus main body to the tube body. A large-diameter cylindrical portion projecting rearward in the insertion direction, an annular projecting portion provided on the inner peripheral surface of the one end portion of the large-diameter cylindrical portion, projecting radially inward, and an inner portion of the annular projecting portion A small-diameter cylindrical portion that is provided on a peripheral portion and extends forward from the annular projecting portion in the insertion direction of the tubular body. The tubular body can be inserted into and removed from the small-diameter cylindrical portion. It is desirable that the release portion is provided at the tip of the portion. In particular, it is desirable that the release portion is formed in an annular shape at the distal end portion of the small diameter cylindrical portion.
Moreover, 2nd invention has a connection hole, the apparatus main body by which a medical pipe body is inserted in the said connection hole from the one end opening part, and the inside of the said connection hole are provided, The said pipe body is the said An engagement member that allows insertion into the connection hole and prevents escape from the connection hole, and is provided inside the connection hole, between the inner peripheral surface of the connection hole and the outer peripheral surface of the tubular body In the medical connection device comprising an annular seal member that seals, the seal member is disposed in front of the engagement member in the insertion direction of the tube body into the connection hole. Yes.
In this case, on the inner peripheral surface of the connection hole, a positioning protrusion is formed that determines the insertion position of the tube body into the connection hole by striking the tip of the tube body inserted into the connection hole. It is desirable that the positioning protrusion is disposed forward of the seal member in the insertion direction of the tube so that the tube protrudes from the tip of the tube after passing through the seal member.

According to the present invention having the above-described characteristic configuration, when the engagement release member is moved from the standby position to the release position in a state where the tube is inserted into the connection hole, the biting teeth are moved in the radial direction from the outer peripheral portion of the tube. It is spaced apart to the outside. Therefore, the engaging member can be extracted from the connection hole. Therefore, the connection device can be reused.
According to the second invention, since the seal member is arranged forward with respect to the engaging member in the insertion direction of the tube body into the connection hole, for example, the contrast agent flows into the connection hole from the tube body. In this case, the contrast agent moves to the engagement member side by the seal member before reaching the engagement member even if it is directed to the engagement member side between the inner peripheral surface of the connection hole and the outer peripheral surface of the tubular body. To be prevented. Therefore, the engaging member is not fixed to the tube. Therefore, it is possible to prevent a situation in which the tube body cannot be extracted from the apparatus main body. Such an effect can be obtained in the same manner when a contrast medium or the like is supplied from the connection hole to the tube.

FIG. 1 is a sectional view showing an embodiment of a medical connection device according to the present invention in a state before a tube body is connected. FIG. 2 is a cross-sectional view showing the embodiment in a state in which the tubular body is connected. FIG. 3 is a cross-sectional view similar to FIG. 2, showing the embodiment in a state in which the engagement release member is moved to the release position. FIG. 4 is an exploded perspective view of the same embodiment. FIG. 5 is a cross-sectional view showing a syringe having a Luer tapered tube portion as a tube body to be connected to the embodiment at the tip portion. FIG. 6 is a cross-sectional view showing a state where the syringe tube is connected to the embodiment. FIG. 7 is a cross-sectional view similar to FIG. 6, showing the embodiment in a state where the engagement release member is moved to the release position.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 4 show a medical connection device 1 according to a first embodiment of the present invention and a tube T connected to another medical device or a human body via the connection device 1. The tube T is made of a resin and is formed as a straight tube having a constant inner and outer diameter.

  The connection device 1 includes a device main body 2, a seal member 3, a holding member 4, an engagement member 5, and an engagement release member 6.

  The apparatus main body 2 has a large diameter portion 2a formed on one end side (left side in FIG. 1) and a small diameter portion 2b formed on the other end side. The large-diameter portion 2a and the small-diameter portion 2b are formed with their axes aligned with each other, and these axes are arranged in the left-right direction in FIG. The large diameter portion 2a and the small diameter portion 2b are both formed in a circular cross section, but may be formed in other shapes, for example, a hexagonal shape. Moreover, the apparatus main body 2 may make the outer diameter constant over the entire length. In addition, about each structural member of the connection apparatus 1 containing the apparatus main body 2, it shall be demonstrated using the right and left of FIG. 1 for convenience of explanation. Of course, the connection apparatus 1 is not limited to such a direction.

  The apparatus body 2 is formed with a connection hole 2c having a circular cross section that passes through the axis from the left end surface to the right end surface. An annular projecting portion (positioning projecting portion) 2d is formed at an intermediate portion of the inner peripheral surface of the connection hole 2c. Instead of the annular protrusion 2d, a plurality of protrusions discontinuous in the circumferential direction may be formed. The connection hole 2c is divided into a left downstream hole 2e and a right upstream hole 2f by the annular protrusion 2d. The downstream hole 2e and the upstream hole 2f may be arranged with their axes slightly shifted from each other. Further, the downstream hole portion 2e may be bent at an intermediate portion in the longitudinal direction and opened on the outer peripheral surface of the large diameter portion 2a.

  One end of the connection pipe 7 is inserted into the downstream hole 2e. The outer peripheral surface of the connection pipe 7 is fixed to the inner peripheral surface of the downstream hole 2e by adhesion or the like. As a result, the connecting pipe 7 is fixed to the apparatus main body 2, and the space between the outer peripheral surface of the connecting pipe 7 and the inner peripheral surface of the downstream hole 2e is sealed. The connecting pipe 7 may be inserted into the downstream hole 2e so as to be detachable. In that case, it is desirable to seal between the outer peripheral surface of the connecting pipe 7 and the inner peripheral surface of the downstream hole 2e with a sealing member such as an O-ring. Further, the connecting pipe 7 is inserted into the downstream hole 2e until the tip surface of the connecting pipe 7 abuts against the annular protrusion 2d. However, the connecting pipe 7 does not necessarily have to abut against the annular protrusion 2d. In this embodiment, a pipe having the same configuration as that of the tube body T is adopted as the connection pipe 7, but a pipe having another configuration may be adopted. The other end of the connection pipe 7 is connected to a medical device, a human body, or the like.

  The upstream hole 2f includes a small diameter hole 2g, a medium diameter hole 2h, and a large diameter hole 2i that are sequentially formed from the annular protrusion 2d toward the right side. These holes 2g, 2h, 2i are arranged with their axes aligned.

The inner diameter of the small-diameter hole 2g is slightly larger than the outer diameter of the tube T. However, as long as the tube T can be inserted, the inner diameter may be substantially the same as the tube T. Moreover, it is good also as a taper hole which becomes a small diameter toward the left, without setting it as a straight hole.

  The medium diameter hole 2h has a larger diameter than the small diameter hole 2g. An annular seal member 3 made of an elastic material such as an O-ring is accommodated in the medium diameter hole 2h. The outer diameter of the seal member 3 is slightly larger than the inner diameter of the medium-diameter hole 2h, and the outer periphery of the seal member 3 is pressed against the inner peripheral surface of the medium-diameter hole 2h by the elasticity of the seal member 3 itself. ing. On the other hand, the inner diameter of the sealing member 3 is smaller than the outer diameter of the tubular body T in a range in which the inner peripheral portion of the sealing member 3 can elastically expand and allow the tubular body T to pass through. Therefore, when the tubular body T is inserted through the seal member 3, the inner peripheral portion of the seal member 3 comes into press contact with the outer peripheral surface of the tubular body T, and the space between the outer peripheral surface of the tubular body T and the inner peripheral surface of the seal member 3 is between. Sealed. In addition, when the tubular body T is inserted into the seal member 3, the seal member 3 is elastically crushed, and the outer peripheral portion of the seal member 3 is further pressed into contact with the inner peripheral surface of the medium-diameter hole portion 2h. The space between the outer peripheral portion 3 and the inner peripheral surface of the medium-diameter hole portion 2h is more highly sealed. In this way, the space between the inner peripheral surface of the medium diameter hole 2 h and the outer peripheral surface of the tube body T is sealed by the seal member 3.

  The large diameter hole 2i has a larger diameter than the medium diameter hole 2h. The right end portion of the large-diameter hole 2i is open to the right end surface of the apparatus main body 2, and this is the right opening of the connection hole 2c. The tube T is inserted into the upstream hole 2f from this opening.

The holding member 4 is accommodated in the large diameter hole 2i. The holding member 4 is formed in a cylindrical shape, and is arranged such that its axis coincides with the axis of the large-diameter hole 2i. The left end portion of the holding member 4 abuts against the bottom surface of the large-diameter hole 2i, thereby preventing the holding member 4 from moving to the left. An engaging protrusion 4 a is formed on the outer peripheral surface of the holding member 4. The engagement protrusion 4a hits the right side surface of the engagement recess 2j formed on the inner peripheral surface of the large-diameter hole 2i, thereby preventing the holding member 4 from moving to the right. Therefore, the holding member 4 is accommodated in the large-diameter hole 2i so as not to move in the left-right direction. The outer diameter of the engagement protrusion 4a is slightly larger than the inner diameter of the large-diameter hole 2i, but the small-diameter portion 2b of the apparatus main body 2 is elastically deformed to enlarge the large-diameter hole 2i, When the holding member 4 is elastically reduced in diameter, the engagement protrusion 4a can be inserted into the large-diameter hole 2i from the opening to the engagement recess 2j.

  An annular protrusion 4 b is formed at the left end of the inner peripheral surface of the holding member 4. The inner diameter of the annular protrusion 4b is set larger than the outer diameter of the tube T. Therefore, the tubular body T can be inserted through the annular protrusion 4b. On the other hand, the inner diameter of the annular protrusion 4b is smaller than the inner diameter of the medium diameter hole 2h, and is set substantially the same as the inner diameter of the small diameter hole 2g. Therefore, when the seal member 3 tries to move to the right, it comes into contact with the annular protrusion 4b. This prevents the seal member 3 from coming out of the medium diameter hole 2h to the right. Moreover, the seal member 3 is prevented from moving to the left by abutting against the bottom surface of the medium diameter hole 2h. Accordingly, the seal member 3 is mounted in the medium diameter hole 2h in a state in which it cannot move substantially in the left-right direction.

  The engagement member 5 is accommodated inside the large-diameter hole 2i on the opening side. The engaging member 5 is made of a thin plate made of metal such as steel, and is formed in an annular shape. And it arrange | positions so that the axis line may correspond with the axis line of the large diameter hole 2i substantially. An annular plate portion 5 a continuous in the circumferential direction is formed on the outer peripheral portion of the engaging member 5. A plurality of biting teeth 5b are formed side by side in the circumferential direction on the inner peripheral portion of the annular plate portion 5a.

  The outer diameter of the annular plate portion 5a is set slightly smaller than the inner diameter of the large-diameter hole portion 2i. Therefore, the annular plate portion 5a, and hence the engagement member 5, can move in the radial direction of the large-diameter hole portion 2i by the difference between the inner diameter of the large-diameter hole portion 2i and the outer diameter of the annular plate portion 5a. The reason why the engaging member 5 is movable in the radial direction of the large-diameter hole 2i will be described later. The engaging member 5 does not necessarily need to be movable in the radial direction of the large-diameter hole 2 i, and may be fixed to the right end surface of the holding member 4. In that case, the axis of the engaging member 5 (annular plate portion 5a) is made to coincide with the axis of the large-diameter hole 2i. The inner diameter of the annular plate portion 5a is set larger than the outer diameter of the tube body T.

The biting teeth 5b are inclined so as to go inward in the radial direction of the engaging member 5 toward the left. In addition, since the adjacent teeth 5b are separated from each other in the circumferential direction, they can be elastically deformed so that the inclination angle changes. The diameter of the inscribed circle in contact with the tip of each biting tooth 5b is set to be smaller than the outer diameter of the tube T by a predetermined dimension. Therefore, when the tubular body T is inserted into the large-diameter hole 2i from the right end opening, the intersection between the distal end surface and the outer peripheral surface of the tubular body T is an intermediate portion between the proximal end portion and the distal end portion of the biting tooth 5b. I hit it. When the tubular body T is further inserted into the large-diameter hole 2i, the engaging member 5 is moved to the left. When the annular plate portion 5 a hits the right end surface of the holding member 4, the engaging member 5 can no longer move to the left. When the tube T is pushed to the left in this state, each biting tooth 5b is inclined, so that an automatic centering action works between the biting tooth 5b and the tube T, and the engaging member 5 is in the radial direction. It is moved in the radial direction of the large-diameter hole 2i. Then, the axis of the engaging member 5 is matched with the axis of the tube T. This is the reason why the engaging member 5 can be moved in the radial direction of the large-diameter hole 2i. When the tube T is further inserted, the biting teeth 5b are pushed leftward by the tube T and elastically deformed, and the diameter of the inscribed circle inscribed in each biting tooth 5b increases. Then, when the diameter of the inscribed circle of each biting tooth 5b is increased to be equal to the outer diameter of the tube body T, the tube body T comes into contact with the distal end portion (end portion on the inner peripheral side) of each engagement tooth 5b. Move left in state. Thereafter, as shown in FIG. 2, the tubular body T penetrates the holding member 4 and the seal member 3 and enters the small-diameter hole portion 2g, and hits the annular protruding portion 2d. Then, the tube T cannot move to the left any more. In this state, when the tube body T is moved to the right so as to be pulled out from the connection hole 2c, each biting tooth 5b bites into the outer peripheral portion of the tube body T and prevents the tube body T from moving to the right. As a result, the tube T is connected to the upstream hole 2f (connection hole 2c) of the apparatus main body 2 so as not to be extracted. Of course, the sealing member 3 seals between the outer peripheral surface of the tube T and the inner peripheral surface of the connection hole 2c (medium diameter hole portion 2h).

A disengagement member 6 is attached to the outer peripheral portion of the small diameter portion 2 b of the apparatus main body 2. The disengagement member 6 has a large-diameter cylindrical portion 6a having a circular cross section. The large-diameter cylindrical portion 6a may be formed with a non-circular cross section. The large diameter cylindrical portion 6a is extrapolated to the small diameter portion 2b so as to be movable in the left-right direction. An engagement protrusion 6b is formed on the inner peripheral surface of the large-diameter cylindrical portion 6a. On the other hand, an engagement recess 2k is formed on the outer peripheral surface of the small diameter portion 2b. When the engagement protrusion 6b hits the right end surface of the engagement recess 2k, the large-diameter cylindrical portion 6a can no longer move to the right. Thereby, the engagement releasing member 6 is prevented from coming off to the right with respect to the small diameter portion 2b. Hereinafter, the position of the engagement release member 6 when the engagement protrusion 6b hits the right end surface of the engagement recess 2k is referred to as a standby position. The inner diameter of the engaging protrusion 6b is smaller than the outer diameter of the small diameter portion 2b, but the large diameter cylindrical portion 6a is elastically expanded and the small diameter portion 2b is elastically reduced in diameter. The large-diameter cylindrical portion 6a can be extrapolated to the small-diameter portion 2b until the engagement protrusion 6b enters the engagement recess 2k.

An operation portion 6c is formed in an annular shape at the left end portion of the outer peripheral surface of the large diameter cylindrical portion 6a. The operation part 6c is for holding the outer peripheral part by hand and moving the disengagement member 6 in the left-right direction. As described above, the disengagement member 6 can move to the right until the engagement protrusion 6b hits the right end surface of the engagement recess 2k, that is, to the standby position, and the operation portion 6c to the left. It can move until it hits the right end surface of the large diameter portion 2a. However, in practice, the disengagement member 6 does not move to the left until the operation portion 6c hits the large-diameter portion 2a, and stops before that. This point will be described later.

An annular projecting portion 6d that projects inward in the radial direction is formed at the right end portion of the inner peripheral surface of the large-diameter cylindrical portion 6a. The annular protrusion 6d is separated from the small-diameter portion 2b to the right so that the engagement release member 6 does not hit the right end surface of the small-diameter portion 2b when the disengagement member 6 is located at any position within the movable range. Are arranged. The inner diameter of the annular protrusion 6d is slightly larger than the outer diameter of the tube body T. Therefore, the tubular body T can be inserted into the annular protrusion 6d.

A small-diameter cylindrical portion 6e extending toward the small-diameter portion 2b is formed on the inner peripheral portion of the end surface facing the small-diameter portion 2b of the annular projecting portion 6d. The small-diameter cylindrical portion 6e is disposed with its axis aligned with the axis of the connection hole 2c. The inner diameter of the small diameter cylindrical portion 6e is the same as the inner diameter of the annular protruding portion 6d. Therefore, the tubular body T can be inserted into the small diameter cylindrical portion 6e.

A contact surface 6f is formed in an annular shape on the radially outer portion of the left end surface of the small-diameter cylindrical portion 6e. The inner diameter of the contact surface 6f is smaller than the inner diameter of the annular plate portion 5a of the engaging member 5, but the outer diameter is larger than the inner diameter of the annular plate portion 5a and smaller than the outer diameter of the annular plate portion 5a. Is set to When the engagement release member 6 is moved to the left, the contact surface 6f abuts against the annular plate portion 5a of the engagement member 5 and abuts against the right end surface of the holding member 4 via the annular plate portion 5a. Moreover, the contact surface 6f is disposed so as to abut against the annular plate portion 5a before the operation portion 6c abuts against the right end surface of the large diameter portion 2a. Therefore, the movement limit position of the engagement release member 6 to the left is determined by the contact surface 6f abutting against the annular plate portion 5a. Hereinafter, the movement limit position to the left of the engagement release member 6 is referred to as a release position.

An annular projecting portion (release portion) 6g extending toward the left is formed on the radially inner portion of the left end surface of the small diameter cylindrical portion 6e. The annular projecting portion 6g is formed coaxially with the small diameter cylindrical portion 6e. When the disengagement member 6 is in the standby position, the annular protrusion 6g is separated from the biting tooth 5b of the engagement member 5 to the right when the disengagement member 6 is in the standby position. When moving to the left to an intermediate position between the standby position and the release position, the tip of the annular protrusion 6g is arranged to abut against the intermediate portion in the radial direction of the biting tooth 5b.

The inner diameter of the annular projecting portion 6g is set to be the same as the inner diameter of the inner cylindrical portion 6e. Therefore, the tubular body T can be inserted through the annular protrusion 6g. The outer peripheral surface of the annular projecting portion 6g is formed as a tapered surface that becomes smaller in diameter toward the left. The inclination angle of the tapered surface is set to be smaller than the inclination angle of the biting teeth 5b of the engagement member 5. The outer peripheral surface of the annular projecting portion 6g may be a cylindrical surface having a constant outer diameter. The outer diameter of the tip edge of the annular protrusion 6g, that is, the minimum outer diameter of the annular protrusion 6g is larger than the diameter of the inscribed circle of the biting tooth 5b and smaller than the inner diameter of the annular plate part 5a. Therefore, when the disengagement member 6 is moved to the left from the standby position, the intersection of the tip surface and the outer peripheral surface of the annular projecting portion 6g hits the biting tooth 5b, and the biting tooth 5b has a diameter of its inscribed circle. Elastically deform to increase. That is, the biting teeth 5b are elastically deformed so that the inclination angle of the biting teeth 5b with respect to the axis of the connection hole 2c becomes small. When the disengagement member 6 is moved to the release position, the diameter of the inscribed circle of the biting tooth 5b becomes larger than the outer diameter of the tube T, and the biting tooth 5b extends in the radial direction from the outer peripheral surface of the tube T. Separate. As a result, the tubular body T can be pulled rightward from the connection hole 2c.

Next, a case where the tube body T is connected to the medical connection device 1 having the above-described configuration will be described. When connecting the tubular body T to the connection device 1, as shown in FIG. 1, the disengagement member 6 is positioned at the standby position, and the axis of the left end portion (tip portion) of the tubular body T is connected to the connection hole. It is almost coincident with the axis of 2c. Then, the tubular body T is inserted into the inner cylindrical portion 6e and further inserted into the large diameter hole portion 2i. Then, the distal end portion of the tubular body T hits the biting tooth 5b and moves the engaging member 5 to the left. When the annular plate portion 5 a hits the holding member 4, the engaging member 5 can no longer move to the left. When the tubular body T is further moved to the left in this state, the tubular body T bites in and elastically deforms the teeth 5b. And the tubular body T penetrates the engaging member 5 in the state which contact | connected the front end surface (inner peripheral surface) of the bite tooth 5b. Thereafter, the tubular body T sequentially passes through the holding member 4 and the seal member 3 and enters the small-diameter hole portion 2g, hits the annular protruding portion 2d, and stops. In this state, when the tubular body T is moved to the right, the biting teeth 5b bite into the outer peripheral portion of the tubular body T and prevent the tubular body T from moving to the right. As a result, the tube body T is connected to the connection device 1, and as a result, the tube body T is connected to another medical device or a human body via the connection device 1. Therefore, when a contrast medium or the like is supplied from the tube body T, the contrast medium is supplied to other medical devices or human bodies through the connection pipe 7.

When the tube body T is extracted from the connection device 1, the engagement release member 6 is moved from the standby position to the release position. Then, each biting tooth 5b is pushed leftward by the annular protrusion 6g, and the biting tooth 5b is elastically deformed so that the diameter of the inscribed circle with respect to each biting tooth 5b is increased. As a result, the tip of each biting tooth 5b is spaced radially outward from the outer peripheral surface of the tube body T, and the engagement state of the engagement member 5 with respect to the tube body T is released. Therefore, the tube body T can be extracted from the connection hole 2c. After the tube body T is extracted from the connection hole 2c, the disengagement member 6 is returned to the standby position.

Thus, in the connection device 1 having the above-described configuration, the tubular body T can be extracted from the connection hole 2c by moving the engagement member 6 from the standby position to the release position. Therefore, it is not necessary to discard the connecting device 1 together with the tube T, and it can be used again for connecting other tubes.

Further, since the seal member 3 is disposed forward of the engagement member 5 in the insertion direction of the tube body T into the connection hole 2c, the portion inside the annular protrusion 2d (connection hole 2c) from the tube body T. When the contrast agent or the like is supplied to the tube, the contrast agent passes between the inner peripheral surface of the upstream hole 2f and the outer peripheral surface of the tube T and travels backward, but can reach the engaging member 5. Absent. Therefore, it is possible to prevent a situation in which the biting teeth 5b are fixed while biting into the outer peripheral portion of the tube T. Therefore, the tube body T can be reliably extracted from the connection device 1.

The connection device 1 having the above-described configuration can also be used to connect other tube bodies than the tube body T. 5 to 7 show the syringe C connected to the connecting device 1. The syringe C is made of a resin, and a tube portion (tubular body) Ca is formed at the tip thereof. The tube portion Ca is formed in a Luer taper shape so that the tip thereof has a smaller diameter than the base end. The outer diameter of the tip edge of the tube portion Ca, that is, the minimum outer diameter is slightly smaller than the inner diameter of the small-diameter hole portion 2g, but larger than the inner diameter of the inscribed circle of the biting teeth 5b of the seal member 3 and the engaging member 5. Is set to The small-diameter hole 2g may be formed in a tapered shape with the same taper angle as the tube portion Ca. The outer diameter of the base end edge of the tube portion Ca, that is, the maximum outer diameter is set to be slightly smaller than the inner diameter of the inner cylindrical portion 6e. Therefore, the pipe portion Ca can be inserted into the upstream hole portion 2f through the inner cylindrical portion 6e.

The total length of the pipe portion Ca is set to be slightly longer than the distance from the annular protrusion 2d to the right end surface of the disengagement member 6 located at the standby position. Therefore, as shown in FIG. 6, the tube portion Ca can be inserted into the upstream hole portion 2 f until the distal end surface of the tube portion abuts against the annular projecting portion 2 d. Ca can be connected to the connection device 1. Further, as shown in FIG. 7, the pipe portion Ca can be extracted from the connection device 1 by moving the engagement release member 6 from the standby position to the release position.

In addition, this invention is not limited to said embodiment, A various modification is employable in the range which does not deviate from the summary.
For example, in the above embodiment, the portion of the connection hole 2c to which the tubular body T is connected is the upstream hole 2f, but this may be the downstream hole. That is, a contrast agent or the like may be caused to flow from the connection pipe 7 into the connection hole 2c and from the connection hole 2c to the tube body T. Even in that case, the contrast agent or the like can be prevented from reaching the engaging member 5.

Ca pipe (tube)
T tube 1 medical connection device 2 device body 2c connection hole 2d annular protrusion (positioning protrusion)
3 Seal Member 5 Engagement Member 5b Biting Teeth 6 Engagement Release Member 6a Large Diameter Cylinder 6d Annular Projection 6e Small Diameter Cylinder 6g Annular Projection (Release)

Claims (5)

An apparatus main body having a connection hole and having a medical tube inserted into the connection hole from an opening at one end thereof, and formed in a ring shape, in the connection hole in a direction opposite to the insertion direction of the tube An engagement member provided in a retaining state,
An annular plate portion is formed on the outer peripheral portion of the engaging member, and a plurality of inclined portions are formed on the inner peripheral portion of the engaging member so as to be directed radially inward toward the front in the insertion direction of the tubular body. When the bite teeth are formed and the tube body inserted in the connection hole in a state penetrating the engagement member is moved in the direction opposite to the insertion direction, the bite teeth bite into the outer periphery of the tube body, In the medical connection device in which the tube body is prevented from coming off from the connection hole,
In the apparatus main body, an engagement release member is provided so as to be movable in the insertion / removal direction of the tubular body between a standby position and a release position which is forward of the tubular body in the insertion direction from the standby position,
The engagement release member is provided with a release portion that can be inserted from the one end opening of the connection hole between the inner peripheral surface of the connection hole and the outer peripheral surface of the tubular body ,
Upper Kigakarigo releasing member, the insertion direction of the pipe body end of the waiting position side from the apparatus main body together with the extrapolated movably between said standby position and said release position on an outer peripheral portion of the device body A large-diameter cylindrical portion projecting rearward, an annular projecting portion provided on the inner peripheral surface of the one end portion of the large-diameter cylindrical portion and projecting radially inward, and an inner peripheral portion of the annular projecting portion A small-diameter cylindrical portion extending toward the front in the insertion direction of the tubular body from the annular protrusion,
The tubular body can be inserted into and removed from the inside of the small-diameter cylindrical portion, and a contact portion is formed at the radially outer portion at the distal end portion of the small-diameter cylindrical portion, and the release portion is formed at the radially inner portion. It is formed so as to extend from the contact portion toward the front of the tube in the insertion direction,
When the engagement release member is located at the standby position, the release portion allows the tube to be inserted into the connection hole, and the engagement release member is moved from the standby position to the release position. The abutment portion abuts against the annular plate portion of the engagement member, and the release portion abuts against the biting tooth and is separated radially outward from the tube body, whereby the tube body is medical connection device, wherein to Rukoto state capable escaping from the connection hole.   The medical connection device according to claim 1, wherein the release portion is formed in an annular shape at a distal end portion of the small diameter cylindrical portion. An annular seal member provided inside the connection hole and sealing between the inner peripheral surface of the connection hole and the outer peripheral surface of the tubular body;
The medical connection device according to claim 1, wherein the seal member is disposed in front of the engagement member in a direction in which the tube body is inserted into the connection hole. Inside the connection hole, an annular seal member that seals between the inner peripheral surface of the connection hole and the outer peripheral surface of the tubular body is provided,
On the inner peripheral surface of the connection hole, a positioning protrusion is formed to determine the insertion position of the tube body into the connection hole by abutting against the tip of the tube body inserted into the connection hole. The portion is arranged in front of the sealing member in the insertion direction of the tubular body so that the tubular body abuts against a distal end portion of the tubular body after passing through the sealing member. The medical connection device as described. An engagement protrusion is formed on the inner peripheral surface of the large-diameter cylindrical portion of the disengagement member,
An engagement recess that engages with the engagement protrusion is formed on the outer peripheral surface of the apparatus body.
2. The engagement release member is prevented from coming off from the apparatus main body by abutting the engagement protrusion on an end surface in the axial direction of the apparatus main body in the engagement recess. The medical connection device as described.

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