JP2015054226A - Medical connector and medical tube kit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medial connector capable of facilitating a connection to a soft tube regardless of a material.SOLUTION: The medical connector comprises: a connector body 2 including a medical instrument connection part to be connected to a medical instrument at a first end side, a cylindrical tube connection part that is inserted into a lumen of a soft tube at a second end side, for connection, and an internal passage that penetrates from the medical instrument connection part to the tube connection part; and a sleeve 3 that covers over the outer peripheral face of the soft tube and is disposed to cover the tube connection part, with the soft tube placed therebetween in the radial direction. The tube connection part includes a plurality of first protrusions 232 formed on the outer peripheral face thereof at prescribed interval spaced in the axial direction. The sleeve includes a plurality of second protrusions 331 formed at the inner peripheral surface thereof, the second protrusions disposed at prescribed intervals apart in the axial direction and disposed between the adjacent first protrusions.

Description

  The present invention relates to a medical connector and a medical tube kit.

  For example, a medical connector for connecting a medical instrument is attached to the end of a soft tube such as a blood circuit used for hemodialysis or a catheter used for vascular access (Patent Document 1). Conventionally, the medical connector and the soft tube are fixed with an adhesive. Specifically, apply adhesive to the end of the medical connector and insert this part into the soft tube, or apply adhesive to the end of the soft tube and insert this part into the medical connector. By doing so, both were fixed.

Utility Model Registration No. 3150585

  However, in the fixing method using the adhesive, when a material with good slip is used as the material for the medical connector, the medical connector and the soft tube may not be fixed with sufficient strength. Therefore, in such a case, there is a method of improving the adhesive strength by performing corona discharge, plasma treatment, etc., but this method cannot increase the adhesive strength so much and also increases the cost. . For this reason, fixing with an adhesive has a problem that the material of the medical connector is limited to a material having good adhesiveness.

  On the other hand, as a method for fixing the medical connector and the soft tube without using an adhesive, there is the following method. That is, the end portion of the soft tube is inserted into the medical connector, and this portion is covered with a heat-shrinkable tube and contracted. Thereby, the connection part of both is crimped and fixed. However, the fixing method by caulking has a problem that the adhesive strength between the medical connector and the soft tube is lowered, or the soft tube is deformed by heat when contracting the heat-shrinkable tube. . In addition, there is a problem that the cost for the process of shrinking the heat-shrinkable tube with heat increases. For this reason, the conventional connector by caulking cannot easily connect the medical connector and the soft tube.

  In one aspect, the present invention has been made in view of such circumstances, and an object thereof is to easily and firmly connect the medical connector and the flexible tube regardless of the material of the medical connector. It is to provide technology that can be used.

  The present invention employs the following configuration in order to solve the above-described problems.

  That is, the first form of the present invention is a connector body having a first end and a second end, the medical instrument connecting part for connecting to the medical instrument on the first end side, A connector main body comprising: a tubular tube connecting portion for inserting and connecting to a lumen of a soft tube on the second end side; and an internal passage penetrating from the medical instrument connecting portion to the tube connecting portion; A cylindrical sleeve that covers the outer peripheral surface of the soft tube, and is arranged so as to cover the tube connecting portion across the soft tube in the radial direction, the outer peripheral surface of the tube connecting portion Are formed with a plurality of first protrusions arranged at predetermined intervals in the axial direction, and are arranged on the inner peripheral surface of the sleeve at predetermined intervals in the axial direction and at least adjacent to the first protrusions. Arranged between the protrusions A plurality of second protrusions are formed, and each of the first protrusions is formed on a part of the outer peripheral surface of the tube connecting portion in the circumferential direction, and each of the second protrusions is an inner peripheral surface of the sleeve. 1 is a medical connector formed in a part of the circumferential direction.

  In the first embodiment of the present invention, a medical instrument connecting portion for connecting to a medical instrument is provided on the first end side of the connector body. The medical instrument is, for example, a syringe, a blood circuit, a plug, or the like. The connector main body is provided with an internal passage penetrating from the medical instrument connecting portion to the tube connecting portion. And the tube connection part inserted and connected to the said soft tube is provided in the 2nd end part side of a connector main body so that soft tubes, such as a catheter, may be connected with the said internal channel | path.

  In the above-described configuration, the medical connector and the soft tube can be fixed by covering the sleeve where the tube connecting portion is inserted into the soft tube. Specifically, the plurality of first protrusions provided on the outer surface of the tube connecting portion press the soft tube from the inside, and the plurality of second protrusions provided on the inner peripheral surface of the sleeve are adjacent to each other. The soft tube is pressed from the outside between the first protrusions. Thereby, since a soft tube deform | transforms into a waveform between a tube connection part and a sleeve, it is firmly fixed with respect to an axial direction. In addition, since the first protrusion and the second protrusion are formed in a part in the circumferential direction, the sleeve is moved in the axial direction and inserted into the tube connecting portion at a rotational position where both protrusions do not interfere with each other. Thereafter, when the sleeve is rotated, the second protrusions can be fitted between the adjacent first protrusions. Therefore, the sleeve can be easily fixed to the tube connecting portion. That is, the medical connector and the soft tube can be easily and firmly connected. Note that “part of the circumferential direction” means that it is not continuous over the entire circumference in the circumferential direction, but may be a plurality of locations in the circumferential direction as long as it is not continuous.

  Therefore, according to the first embodiment of the present invention, the medical connector and the soft tube are fixed by the sleeve, so that the medical connector and the soft tube can be easily and firmly secured regardless of the material of the medical connector. It becomes possible to connect to.

  In the second embodiment of the present invention, a plurality of fitting portions into which the first protrusions are fitted are formed on the inner circumferential surface of the sleeve, and the fitting portions are formed on the inner circumferential surface of the sleeve. The medical connector according to the first aspect, wherein the medical connector is formed in a part of the circumferential direction. According to the 2nd form, since a 1st projection part fits in a fitting part, only the depth of a fitting part can push a soft tube to radial direction outward. Therefore, the soft tube can be more significantly deformed into a waveform between the tube connecting portion and the sleeve. As a result, it is possible to increase the fixing strength between the medical connector and the soft tube.

  According to a third aspect of the present invention, a locking portion is formed on the outer peripheral surface of the sleeve, and a locked portion that can be locked to the locking portion is formed on the connector body. It is a medical connector of the said 1st form or 2nd form which regulates the movement of the axial direction of the said sleeve with respect to the said connector main body because a part and a to-be-latched part latch. According to the 3rd form, it can prevent that a sleeve shifts | deviates to an axial direction with respect to a tube connection part because a latching | locking part latches to a to-be-latched part.

  Moreover, the 4th form of this invention is a form in any one of the said 1st form to the 3rd form in which the said medical instrument connection part contains the lure taper formed in the said 1st end part side of the said internal channel | path. It is the medical connector which concerns on this. According to the 3rd form, it becomes possible to connect the medical instrument by which the lure taper was employ | adopted to the medical connector of this invention.

  Further, according to a fifth aspect of the present invention, the connector body has a grip portion having an outer diameter larger than that of the tube connection portion and the medical device connection portion between the tube connection portion and the medical device connection portion. The medical connector according to any one of the first to fourth aspects, further comprising: According to the fifth embodiment, since the grip portion can be easily gripped by hand, it is possible to improve workability such as connecting a medical instrument to the medical connector.

  Moreover, the 6th form of this invention is a medical connector which concerns on the form in any one of the said 1st form to the 5th form whose material of the said connector main body is polyolefin resin. Here, the polyolefin resin is, for example, polypropylene, polyethylene, polyacetal, or the like. Since the polyolefin-based resin has good slippage, according to the sixth embodiment, it is possible to make it difficult to cause overfitting between the medical connector of the present invention and the medical instrument.

  Moreover, the seventh form of the present invention is a soft tube and a medical connector connected to the end of the soft tube, the medical connector according to any one of the first to sixth forms, A medical tube kit comprising: According to the seventh embodiment, it is possible to provide a medical tube kit that can easily connect the medical connector and the soft tube regardless of the material of the medical connector.

  According to the present invention, it is possible to easily and firmly connect the medical connector and the soft tube regardless of the material of the medical connector.

FIG. 1 is a perspective view illustrating a medical connector according to an embodiment. FIG. 2 is a perspective view illustrating the connector main body according to the embodiment. FIG. 3 is a front view illustrating the connector main body according to the embodiment. FIG. 4 is a side view illustrating the connector main body according to the embodiment. FIG. 5 is a plan view illustrating a connector main body according to the embodiment. FIG. 6 is a bottom view illustrating the connector main body according to the embodiment. FIG. 7 illustrates a cross section taken along line AA of FIG. FIG. 8 is a perspective view illustrating a sleeve according to the embodiment. FIG. 9 is a front view illustrating a sleeve according to the embodiment. FIG. 10 is a side view illustrating the sleeve according to the embodiment. FIG. 11 is a plan view illustrating a sleeve according to the embodiment. FIG. 12 is a bottom view illustrating the sleeve according to the embodiment. FIG. 13 illustrates a cross section taken along line B-B in FIG. 9. FIG. 14A illustrates a process of connecting the medical connector according to the embodiment to a soft tube. FIG. 14B illustrates the process of connecting the medical connector according to the embodiment to a soft tube. FIG. 14C illustrates a process of connecting the medical connector according to the embodiment to the soft tube. FIG. 15 is a front view illustrating a state where the medical connector and the soft tube according to the embodiment are coupled. FIG. 16 is a side view illustrating a state where the medical connector and the soft tube according to the embodiment are coupled. FIG. 17 illustrates a cross section taken along the line CC of FIG.

  Hereinafter, an embodiment according to an aspect of the present invention (hereinafter, also referred to as “this embodiment”) will be described with reference to the drawings. However, this embodiment described below is only an illustration of the present invention in all respects. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. That is, in implementing the present invention, a specific configuration according to the embodiment may be adopted as appropriate.

§1 Configuration example [Overall structure]
Initially, the outline of the whole structure of the medical connector 1 which concerns on this embodiment is demonstrated using FIG. FIG. 1 is a perspective view illustrating a medical connector 1 according to this embodiment. For convenience of explanation, the upper direction in FIG. 1 is referred to as “upper” and the lower direction in FIG. 1 is referred to as “lower”.

  The medical connector 1 according to the present embodiment is a connector used for liquid-tightly connecting medical instruments such as a syringe, a blood circuit, and a plug to the soft tube 4, and is exemplified in FIG. The connector body 2 and the cylindrical sleeve 3 are also included. The medical connector 1 is attached to the end portion of the soft tube 4 by inserting the lower end side (a tube connecting portion 23 described later) of the connector main body 2 into the soft tube 4 and covering the sleeve 3 over the portion. The soft tube 4 is a medical tube such as a tube used in a catheter or blood circuit, and is formed of a material such as polyurethane, silicone, polyvinyl chloride, polybutadiene, polyamide, ethylene vinyl acetate copolymer, or the like. be able to. The connector body 2 is attached with the medical instrument described above. Below, the medical connector 1 attached to the edge part of such a soft tube 4 is demonstrated in detail. The combination of the medical connector 1 and the soft tube 4 corresponds to the medical tube kit of the present invention.

[Connector body]
First, the connector main body 2 will be described with reference to FIGS. 2 to 6 are a perspective view, a front view, a side view, a plan view, and a bottom view, respectively, illustrating the connector main body 2 according to this embodiment. Moreover, FIG. 7 illustrates the AA line cross section of FIG. For convenience of explanation, the vertical direction in FIG. 3 is referred to as “vertical” as in FIG. Further, the left and right direction in FIG. 3 is referred to as “left and right”, the front side in FIG. 3 is referred to as “front”, and the back side in FIG. 3 is referred to as “rear”.

  As illustrated in FIGS. 2 and 3, the connector main body 2 has a first end 25 and a second end 26 at both ends in the vertical direction, and the cylindrical portion 20 in order from the first end 25 side. , A gripping portion 21 and a tube connecting portion 23 are provided. 2 and FIGS. 5 to 7, the upper end (first end portion 25) of the cylindrical portion 20 and the lower end (second end portion 26) of the tube connecting portion 23 are opened. The connector main body 2 includes an internal passage 24 that penetrates from the upper end of the cylindrical portion 20 to the lower end of the tube connecting portion 23. That is, the internal passage 24 extends in the vertical direction through the cylindrical portion 20, the gripping portion 21, and the tube connecting portion 23.

  A male screw portion 201 is provided on the outer peripheral surface on the upper end side of the cylindrical portion 20 provided on the first end portion 25 side. Further, as illustrated in FIG. 7, the internal passage 24 has a cylindrical shape whose diameter gradually narrows from the first end 25 side to the vicinity of the center and is substantially the same diameter from the vicinity of the center to the second end 26 side. It is a passage. A female luer taper-shaped luer taper portion 241 is formed on the first end portion 25 side of the internal passage 24. A medical instrument corresponding to each shape is attached to the male screw part 201 and the luer taper part 241. That is, the male screw portion 201 and the luer taper portion 241 provided on the first end portion 25 side correspond to the “medical device connection portion” of the present invention.

  For example, a plug, cap, lock ring or the like provided with a female screw portion is screwed into and connected to the male screw portion 201. Further, a syringe, blood circuit, plug and the like having a male luer taper shape are inserted and connected to the luer taper portion 241. Here, the medical device may be connected by a luer slip method by friction with the luer taper portion 241, or in addition to friction with the luer taper portion 241, a luer lock method by screw coupling with the male screw portion 201. It may be connected with.

  A columnar gripping portion 21 having a parallelogram in cross section is provided at the lower end side of the cylindrical portion 20 to which the medical instrument is connected, in other words, between the cylindrical portion 20 and the tube connecting portion 23. As illustrated in FIG. 5, the width of the grip portion 21 in the front-rear direction is substantially the same as that of the cylindrical portion 20. On the other hand, as illustrated in FIG. 3, the width in the left-right direction of the grip portion 21 is wider than the cylindrical portion 20 and the tube connection portion 23. Accordingly, the grip portion 21 is a horizontally long portion of the connector main body 2 and is a portion that is easy for the user to grip.

  Therefore, for example, in order to attach the above-described medical instrument to the first end portion 25 side, the user grips the grip portion 21 with his / her hand and rotates or pushes the connector main body 2 (medical connector 1). To do. Note that if the grip portion 21 is too large, there is a possibility of causing physical interference with other instruments. Therefore, the left and right width of the gripping portion 21 is set to, for example, about 1.5 to 4 times the left and right width of the cylindrical portion 20, and preferably 2 to 3 times the left and right width of the cylindrical portion 20 It is set to a length of about.

  Further, as illustrated in FIG. 3, two opposing columnar locked portions 22 are provided on both sides of the lower end of the grip portion 21. Below, when distinguishing these two to-be-latched parts 22, it shall call the 1st to-be-latched part 22a and the 2nd to-be-latched part 22b, respectively for convenience of explanation. In addition, when distinguishing the constituent elements of each locked portion 22, names such as the outer portion 221 a are used up to the alphabet, and when not distinguishing the constituent elements of each locked portion 22, the outer portion 221 or the like is used. Thus, the number will be referred to.

  Each of the two locked portions 22 includes an outer portion 221 that extends downward from both sides of the lower end of the grip portion 21, and an inner portion 222 that extends radially inward from the outer portion 221. As illustrated in FIG. 6, the bottom portion 223 formed by the outer portion 221 and the inner portion 222 is L-shaped when viewed from the bottom surface side (second end portion 26 side).

  As illustrated in FIG. 3, the outer side surface of the outer portion 221 is continuous with the grip portion 21 and has a shape that extends the grip portion 21 downward. In this embodiment, this makes it easy for the user to grip the grip portion 21.

  Moreover, the inner side part 222 has the extension part 224 extended inward (the direction of the tube connection part 23) in the lower end side, and has an L-shape when viewed from the front. Further, the inner portion 222 is provided with a rectangular convex portion 226 that protrudes inward (in the direction of the tube connecting portion 23) on the side wall 225 located above the extending portion 224.

  Next, the tube connection part 23 will be described. On the lower end side of the grip portion 21, a cylindrical tube connection portion 23 extending in the vertical direction is provided between the pair of locked portions 22a and 22b described above. The tube connecting portion 23 is a portion that is inserted into the soft tube from the end portion of the soft tube 4, and has a tapered connecting portion 231 whose diameter increases at the end portion on the gripping portion 21 side. Further, the tube connection part 23 has a plurality of arc-shaped protrusions 232 protruding from the outer surface of the tube connection part 23. In the present embodiment, the protruding portions 232 are not continuous in the circumferential direction of the tube connecting portion 23, and are provided at a total of 8 locations of 4 locations before and after the tube connecting portion 23.

  More specifically, four projections 232 are provided on the front surface of the tube connection portion 23 at predetermined intervals along the axial direction. Similarly, four protrusions 232 are provided on the rear surface of the tube connection portion 23 at positions corresponding to the four protrusions 232 on the front surface side. Each protrusion 232 is formed in an arc shape along the outer peripheral surface of the tube connecting portion 23, and a gap is formed between the front-side protrusion 232 and the rear-side protrusion 232. . This gap is preferably a gap that is larger than the circumferential length of the convex portion 331 of the sleeve 3 to be described later and that allows the convex portion 331 to pass in the axial direction. The tip of each protrusion 232 is not chamfered and has a sharp corner. Moreover, the height from the outer peripheral surface of the tube connection part 23 of the said projection part 232 is suitably set, for example so that the soft tube 4 may not come off. In the present embodiment, the height of the protrusion 232 is set to about 0.05 to 1.00 mm, preferably 0.2 to 0.8 mm, and more preferably 0.3 to 0.5 mm.

  And between the protrusion parts 232 adjacent to an up-down direction, the recessed part 233 slightly depressed in the rectangular shape is provided in the position corresponding to the convex part 331 of the sleeve 3 mentioned later. In the present embodiment, the recesses 233 are provided at a total of six locations, three at each of the front and rear of the tube connection portion 23.

  The connector body 2 according to the present embodiment has the components as described above. The material forming the connector body 2 may not be limited, but as the material of the connector body 2, for example, a synthetic resin is employed, and preferably a polyolefin resin such as polypropylene, polyethylene, or polyacetal is employed. The The reason is as follows.

  Conventionally, since a medical connector is fixed to a soft tube with an adhesive, polycarbonate having excellent adhesiveness has been adopted as a material for the medical connector. When a user tries to fix a medical instrument wet with a liquid such as a disinfectant or blood to such a polycarbonate medical connector, the liquid becomes a lubricant, and the medical connector and the medical connector are used. There was a high possibility that the device would be firmly fixed.

  If the medical connector and the medical instrument are firmly fixed, it becomes difficult to remove the medical instrument. In such a case, for example, a user (medical worker) may attempt to remove the medical instrument using forceps or the like and destroy the medical connector. If the medical connector is destroyed, the soft tube (catheter) to which the broken medical connector is attached must be replaced, which causes a very disadvantageous situation for the user (healthcare professional) and the patient. It will be. Therefore, in order to prevent such a disadvantageous situation from occurring, it is preferable that the material of the connector main body 2 to which the medical device is connected is a polyolefin-based slipper that is not easily fixed as described above and has good sliding properties. Resin is adopted.

[sleeve]
Next, the sleeve 3 will be described with reference to FIGS. 8 to 12 are a perspective view, a front view, a side view, a plan view, and a bottom view, respectively, illustrating the sleeve 3 according to this embodiment. Moreover, FIG. 13 illustrates the BB line cross section of FIG. For convenience of explanation, as in FIG. 3, the vertical direction of FIG. 9 is “up and down”, the horizontal direction of FIG. 9 is “left and right”, the front side of FIG. 9 is “front”, and the back side of FIG. The side will be referred to as “rear”.

  As illustrated in FIG. 8 and FIG. 9, the sleeve 3 has a first end 34 and a second end 35 at both ends in the vertical direction, and the first end 34 in order from the first end 34 side. A cylindrical portion 30 and a second cylindrical portion 31 having a slightly larger diameter than the first cylindrical portion 30 are provided. As illustrated in FIGS. 8 and 11 to 13, the upper end (first end portion 34) of the first cylindrical portion 30 and the lower end (second end portion 35) of the second cylindrical portion 31 are opened. The sleeve 3 includes an internal space 33 that penetrates from the upper end of the first cylindrical portion 30 to the lower end of the second cylindrical portion 31.

  The width in the left-right direction of the first cylindrical portion 30 provided on the first end portion 34 side is substantially the same as the width between the opposing extension portions 224a and 224b of the connector body 2, and can pass between these. Is set to about. Further, the vertical length of the first cylindrical portion 30 is shorter than the vertical length of the locked portion 22 of the connector main body 2.

  Two rectangular locking portions 32 facing left and right are provided on the outer peripheral edge of the upper end of the first cylindrical portion 30. Hereinafter, similarly to the above-described locked portion 22, when the two locking portions 32 are distinguished from each other, for convenience of explanation, they are referred to as a first locking portion 32a and a second locking portion 32b, respectively. Further, when distinguishing the constituent elements of the respective locking portions 32, the alphabet is referred to as a concave portion 321 a or the like, and when not distinguishing the constituent elements of the respective locking portions 32, the number is referred to as a concave portion 321. I will do it.

  As illustrated in FIGS. 8 to 11, the locking portion 32 protrudes from the outer surface of the first cylindrical portion 30 and has a concave portion 321 that is recessed in a rectangular shape from the first end portion 34 side. . Further, as illustrated in FIG. 11, a chamfered tapered portion 322 is provided on either side of the circumferential direction (XY direction in the drawing) of both sides of the recess 321. In FIG. 11, each tapered portion 322 is provided on the X direction side of each concave portion 321 so as to be inclined along the circumferential direction.

  The above-described second cylindrical portion 31 is integrally connected to the lower side of the first cylindrical portion 30, in other words, the second end portion 35 side. The width | variety of the left-right direction of the 2nd cylindrical part 31 is larger than the width | variety between the extension parts 224a and 224b which the said connector main body 2 opposes, and a lower end is a little tapered. The second cylindrical portion 31 has a rectangular fitting portion 311 that penetrates from the internal space 33 to the outer surface. In the present embodiment, the fitting part 311 is provided in total at six places, three at a predetermined interval in the axial direction before and after the second cylindrical part 31. And these fitting parts 311 are each arrange | positioned in the position corresponding to each of three lower projection parts 232 among the projection parts 232 which the said tube connection part 23 has, and each projection part is mentioned so that it may mention later. 232 is fitted.

  The internal space 33 penetrating the sleeve 3 is formed from the first end 34 to the second end 35 in a cylindrical shape having a slightly larger diameter on the first end 34 side and a slightly smaller diameter on the second end 35 side. Has been. As illustrated in FIGS. 11 to 13, the internal space 33 is provided with an arc-shaped convex portion 331 that protrudes radially inward from the inner peripheral surface of the sleeve 3. The convex portions 331 are not continuous in the circumferential direction of the sleeve 3, and are provided at a total of six locations, three at each of the front and rear of the inner peripheral surface of the sleeve 3. More specifically, it is arranged above each fitting portion 311. Two of the lower convex portions 331 (four in total in the front and rear) are arranged between the fitting portions 311 adjacent in the axial direction. Further, as shown in FIG. 11, the convex portion 331 and the fitting portion 311 are arranged at a position shifted by 90 degrees in the circumferential direction from the locking portion 32.

  Each of the convex portions 331 is formed in the same manner as the protruding portion 232 of the connector main body 2. For example, the tip of each convex portion 331 is formed to have a sharp angle, and the height from the inner peripheral surface of the internal space 33 of each convex portion 331 is set to about 0.05 to 1.00 mm, preferably Is set to 0.2 to 0.8 mm, more preferably 0.3 to 0.5 mm.

  The sleeve 3 according to the present embodiment has the components as described above. The material forming such a sleeve 3 may not be particularly limited, and may be appropriately selected according to the embodiment. As the material of the sleeve 3, the same material as the connector main body 2 may be used, or a material different from the connector main body 2 may be used.

[Example of installation]
Finally, an example of the process of attaching the medical connector 1 to the end 40 of the soft tube 4 will be described with reference to FIGS. 14A to 14C, and the soft tube 4 will be described with reference to FIGS. 1 and 15 to 17. A state in which the medical connector 1 is attached to the end portion 40 will be described. 14A to 14C illustrate a process of connecting the medical connector 1 according to this embodiment to the soft tube 4. FIGS. 15 and 16 are a front view and a side view, respectively, illustrating a state in which the medical connector 1 and the soft tube 4 according to this embodiment are connected. FIG. 17 illustrates a cross section taken along the line CC of FIG.

  As illustrated in FIG. 14A, when attaching the medical connector 1 according to this embodiment to the end 40 of the soft tube 4, the user first places the end 40 of the soft tube 4 in the inner space 33 of the sleeve 3. Insert the soft tube 4 through the sleeve 3. And a user inserts the tube connection part 23 of the connector main body 2 in the soft tube 4 from the edge part 40 so that it may be illustrated by FIG. 14B. At this time, it is preferable that the user inserts the tube connecting portion 23 into the soft tube 4 until the end portion 40 of the soft tube 4 comes into contact with the upper end of the connecting portion 231, in other words, the lower end surface of the grip portion 21. In addition, the following effect can be acquired when a solvent is made to contact the site | part (near end part 40 vicinity) used as the tube connection part 23 insertion part of the soft tube 4. FIG. That is, when the part is brought into contact with (immersed in) a solvent capable of dissolving the tube molding material to some extent, the solvent becomes a lubricant and the tube connecting portion 23 can be easily inserted. Moreover, since the soft tube 4 is softened by the solvent, the soft tube 4 can be deformed so as to follow the shapes of the tube connection portion 23 and the sleeve 3, and the adhesion can be improved. As the solvent, for example, cyclohexanone, tetrahydrofuran, benzene, methylene chloride, chloroform, carbon disulfide, or the like can be used although it varies depending on the molding material of the tube to be used.

  After inserting the tube connecting portion 23 into the soft tube 4, the user rotates the locking portion 32 of the sleeve 3 so as not to interfere with the locked portion 22 of the connector body 2 as illustrated in FIG. 14CB. That is, the locking portion 32 is directed in the front-rear direction. Thereby, each convex part 311 of the inner peripheral surface of the sleeve 3 is arrange | positioned in the position which shifted | deviated 90 degree | times to each protrusion part 233 of the tube connection part 23 in the circumferential direction. Therefore, the convex portion 311 and the protruding portion 233 do not interfere with each other at this rotational position. In this state, the sleeve 3 is moved upward to the connector main body 2 side until the lower end of the locking portion 32 comes above the extended portion 224 of the locked portion 22. Thereby, the sleeve 3 is in a state of covering the portion where the tube connecting portion 23 of the soft tube 4 is inserted.

  Then, the user rotates the sleeve 3 in the circumferential direction (XY direction in the drawing) by about 90 degrees so that the convex portion 226 of the locked portion 22 fits into the concave portion 321 of the locking portion 32. The concave portion 321a of the first locking portion 32a is locked to the convex portion 226a of the first locked portion 22a, and the concave portion 321b of the second locking portion 32b is locked to the convex portion 226b of the second locked portion 22b. As a result, the sleeve 3 is fixed to the connector main body 2, and the medical connector 1 is attached to the end portion 40 of the soft tube 4 as illustrated in FIGS.

  The locking portion 32 of the sleeve 3 is provided with a tapered portion 322 on the X direction side of the concave portion 321. Therefore, the user can easily fix the sleeve 3 to the connector main body 2 by turning the sleeve 3 in the X direction rather than turning the sleeve 3 in the Y direction. Here, if tapered portions are provided on both sides of the concave portion 321, the sleeve 3 may be easily detached from the connector main body 2. Therefore, in the present embodiment, the tapered portion 322 is provided in one direction of the rotation direction of the sleeve 3.

  Further, when the sleeve 3 is rotated as described above, the convex portion 331 of the sleeve 3 fits between the protruding portion 232 of the tube connecting portion 23 together with the locking of the locking portion 32 and the locked portion 22. . At the same time, each protrusion 232 fits in each fitting portion 311. Therefore, as illustrated in FIG. 17, the protruding portion 232 of the tube connecting portion 23 is in a state in which the soft tube 4 is pushed into the fitting portion 311 of the sleeve 3, and the soft tube 4 is protruded from the tube connecting portion 23. The portion 232 and the fitting portion 311 of the sleeve 3 are sandwiched. The soft tube 4 is pressed radially inward by the convex portion 331 of the sleeve 3. That is, the soft tube 4 is pressed around the tube connection portion 23 so that the cross section becomes a waveform. As a result, the medical connector 1 is fixed to the end 40 of the soft tube 4. Here, in this embodiment, since the projection part 232 has a sharp angle | corner, it can make it difficult to pull out the soft tube 4 from the medical connector 1. FIG.

  As described above, according to the present embodiment, the medical connector 1 and the flexible tube 4 can be firmly fixed. This point will be described in detail. Of the eight protrusions 232, six protrusions 232 except for the two front and rear protrusions 232 existing at positions close to the connecting part 231 are fitted into the respective fitting parts 311. The two protrusions 232 present at positions close to the connecting portion 231 have a slightly larger diameter in the inner space 33 of the sleeve 3 above the two front and rear projections 331 located on the first end 34 side. It is arranged in the part. These two protrusions 232 sandwich the upper end of the two front and rear projections 331 located on the first end 34 side and the soft tube 4 so that the soft tube 4 is not easily pulled out from the medical connector 1. .

  Similarly, the convex portion 331 of the sleeve 3 is located at a position where the convex portion 331 of the sleeve 3 can be fitted into the concave portion 233 of the tube connecting portion 23 in a state where the locking portion 32 is locked to the locked portion 22 of the connector body 2. Is arranged. Therefore, the convex portion 331 of the sleeve 3 is in a state in which the soft tube 4 is pushed into the concave portion 233 of the tube connecting portion 23, and the soft tube 4 is inserted into the convex portion 331 of the sleeve 3 and the concave portion 233 of the tube connecting portion 23. It will be sandwiched. Thereby, the medical connector 1 can be firmly fixed to the end portion 40 of the soft tube 4. In addition, since the convex part 331 has a sharp angle | corner similarly to the projection part 232, it can make it difficult to pull out the soft tube 4 from the medical connector 1 further.

  Further, since the second cylindrical portion 31 of the sleeve 3 has a larger diameter than the width between the extending portion 224a and the extending portion 224b of the connector main body 2, the first cylindrical portion 30 and the second cylinder of the sleeve 3 are used. The step between the portion 31 physically interferes with the bottom portion 223 of the locked portion 22. Here, the first cylindrical portion 30 of the sleeve 3 is shorter in the vertical direction than the locked portion 22 of the connector body 2.

  Therefore, the connector main body 2 and the sleeve 3 are in a state in which the tube connecting portion 23 covers the sleeve 3 in a state where the locking portion 32 is locked to the locked portion 22 of the connector main body 2, in other words, FIG. In the up and down direction, they are separated from each other without being in close contact with each other. Thereby, a gap is generated between the first end portion 34 of the sleeve 3 and the lower end of the grip portion 21.

  When attaching the medical connector 1 to the end portion 40 of the soft tube 4, the tube connection portion 23 is inserted into the soft tube 4 until the end portion 40 of the soft tube 4 contacts the lower end surface of the grip portion 21 as described above. In this case, the periphery of the end portion 40 of the soft tube 4 is sandwiched between the connecting portion 231 formed in a tapered shape and the first end portion 34 of the sleeve 3. In the present embodiment, this makes it possible to further prevent the soft tube 4 from coming out of the medical connector 1.

  For these reasons, according to the present embodiment, the medical connector and the soft tube can be easily and firmly connected regardless of the material of the medical connector. In addition, this makes it easy to employ a slippery polyolefin resin, which has been difficult to employ as a medical connector material by fixing with an adhesive, as a medical connector material.

§2 Modifications As described above, the embodiments of the present invention have been described in detail. However, the above description is merely an illustration of the present invention in all respects. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention.

  For example, regarding the above-described specific configurations of the connector main body 2 and the sleeve 3 of the medical connector 1, the components may be appropriately omitted, replaced, and added according to the embodiment.

  For example, in the above-described embodiment, the male screw portion 201 and the luer taper portion 241 are provided as the medical device connecting portion for connecting the medical device, but the male screw portion 201 and the luer taper portion 241 are provided as follows. It may be omitted and replaced with other connection means.

  Moreover, in the said embodiment, the fixing | fixed part by the projection part 232 of the tube connection part 23 and the fitting part 311 of the sleeve 3, fixation by the recessed part 233 of the tube connection part 23 and the convex part 331 of the sleeve 3, the connection part of the tube connection part 23 The medical connector 1 is attached to the end portion 40 of the flexible tube 4 by three types of fixing, that is, fixing by the first end portion 34 of the sleeve 231 and the sleeve 3. However, in order to attach the medical connector 1 to the end portion 40 of the soft tube 4, it is sufficient that at least the fixing by the projection 232 of the tube connection portion 23 and the convex portion 331 of the sleeve 3 is present, and the fitting of the sleeve 3 is sufficient. The part 311, the recess 233 of the tube connection part 23, and the connection part 231 of the tube connection part 23 may be omitted.

  In the said embodiment, although the projection part 232 is provided in the front surface side and the rear surface side in the outer peripheral surface of the tube connection part 23, it is not limited to this. That is, the protrusions 232 can be provided at three or more locations along the circumferential direction of the outer peripheral surface of the tube connection portion 23 with a predetermined interval. Alternatively, the protrusion 232 can be provided at one place in the circumferential direction of the outer peripheral surface. The shape of the projecting portion 232 is not particularly limited as long as the shape can press the soft tube 4. Along with this, the convex portion 331 formed on the inner peripheral surface of the sleeve 3 can also be provided at one place or three places in the circumferential direction.

  Further, the grip portion 21 may not be provided between the cylindrical portion 20 and the tube connection portion 23, and the portion where the locking portion 32 of the sleeve 3 is locked to the locked portion 22 of the connector body 2. The sleeve 3 may be firmly fixed to the connector body 2 by applying an adhesive or the like.

  For example, regarding the specific configurations described above of the connector main body 2 and the sleeve 3, the number, position, size, and shape of each component can be selected and changed as appropriate according to the embodiment.

  For example, in the above embodiment, the locking portion 32 of the sleeve 3 is configured such that the convex portion 226 provided on the locked portion 22 of the connector body 2 is fitted into the concave portion 321 of the locking portion 32. The connector body 2 is locked to the locked portion 22. However, the method for locking the locking portion 32 of the sleeve 3 to the locked portion 22 of the connector main body 2 is not limited to such a method. For example, a convex portion is provided in the locking portion 32 of the sleeve 3, a concave portion is provided in the locked portion 22 of the connector main body 2, and the convex portion of the sleeve 3 is fitted into the concave portion of the connector main body 2. The three locking portions 32 may be locked to the locked portion 22 of the connector body 2.

  In the above embodiment, the first cylindrical portion 30 of the sleeve 3 is shorter than the locked portion 22 of the connector main body 2 in the vertical direction. However, the locked portion 22 of the connector body 2 may be formed shorter in the vertical direction than the first cylindrical portion 30 of the sleeve 3. Thus, the connector body 2 and the sleeve 3 may be formed so that no gap is generated between the first end portion 34 of the sleeve 3 and the lower end of the grip portion 21.

  In the above embodiment, the fitting portion 311 of the sleeve 3 opens to the outer surface side of the sleeve 3. However, the fitting portion 311 may not be open on the outer surface side of the sleeve 3, and may be a depression provided on the inner peripheral surface of the sleeve 3.

  Moreover, in the said embodiment, the to-be-latched part 22 of the connector main body 2 and the latching | locking part 32 of the sleeve 3 are provided 2 each. However, the number of the latched portions 22 and the latching portions 32 is not limited to two as long as the sleeve 3 is sufficiently fixed to the connector body 2, and may be one or three. It may be the above.

  Moreover, in the said embodiment, the eight projection parts 232 are provided in the tube connection part 23. FIG. However, as long as the medical connector 1 can be attached to the soft tube 4, the number of the protrusions 232 is not limited to eight, may be seven or less, and is nine or more. Also good. Similarly, the number of the concave portions 233 of the tube connecting portion 23, the fitting portions 311 of the sleeve 3, and the convex portions 331 of the sleeve 3 may be five or less, or may be seven or more.

1 ... Medical connector,
2 ... Connector body,
20 ... cylindrical part, 201 ... male screw part,
21 ... gripping part,
22a ... first locked portion, 221a ... outer portion, 222a ... inner portion,
223a ... bottom part, 224a ... extension part, 225a ... side wall, 226a ... convex part,
22b ... 2nd locked part, 221b ... outside part, 222b ... inside part,
223b ... bottom part, 224b ... extension part, 225b ... side wall, 226b ... convex part,
23 ... Tube connection part, 231 ... Connection part, 232 ... Projection part (first projection part), 233 ... Concave part,
24 ... Internal passage, 241 ... Luer taper part,
25 ... first end, 26 ... second end,
3 ... Sleeve,
30 ... 1st cylindrical part,
31 ... 2nd cylindrical part, 311 ... Fitting part,
32a ... 1st latching | locking part, 321a ... recessed part, 322a ... taper part,
32b ... 2nd latching | locking part, 321b ... recessed part, 322b ... taper part,
33 ... Internal space, 331 ... Projection (second projection),
34 ... 1st end part, 35 ... 2nd end part,
4 ... soft tube, 40 ... end

Claims (7)

A connector body having a first end and a second end, wherein the first end is connected to a medical instrument on the first end side, and a soft tube is connected to the second end side. A connector main body comprising: a tubular tube connecting portion for inserting and connecting to a cavity; and an internal passage penetrating from the medical instrument connecting portion to the tube connecting portion;
A cylindrical sleeve that covers the outer peripheral surface of the soft tube, and is arranged so as to cover the tube connecting portion across the soft tube in the radial direction;
With
A plurality of first protrusions arranged at predetermined intervals in the axial direction are formed on the outer peripheral surface of the tube connecting portion,
A plurality of second protrusions are formed on the inner peripheral surface of the sleeve at predetermined intervals in the axial direction, and are disposed at least between the adjacent first protrusions.
Each said 1st projection part is formed in a part of peripheral direction in the outer peripheral surface of the said tube connection part,
Each said 2nd projection part is a medical connector currently formed in a part of circumferential direction in the inner peripheral surface of the said sleeve. On the inner peripheral surface of the sleeve, a plurality of fitting portions into which the first protrusions are fitted are formed,
The medical connector according to claim 1, wherein each of the fitting portions is formed in a part of a circumferential direction on an inner peripheral surface of the sleeve. A locking portion is formed on the outer peripheral surface of the sleeve,
The connector body is formed with a locked portion that can be locked to the locking portion,
The medical connector according to claim 1 or 2, wherein movement of the sleeve in the axial direction relative to the connector main body is restricted by the locking portion and the locked portion being locked. The medical instrument connection portion includes a luer taper formed on the first end side of the internal passage.
The medical connector according to any one of claims 1 to 3. The connector body further includes a grip portion having a larger outer diameter than the tube connection portion and the medical device connection portion between the tube connection portion and the medical device connection portion.
The medical connector according to any one of claims 1 to 4. The material of the connector body is a polyolefin resin,
The medical connector according to any one of claims 1 to 5. A soft tube,
A medical connector connected to an end of a soft tube, the medical connector according to any one of claims 1 to 6,
Comprising
Medical tube kit.