JP5363928B2 - Medical connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical connector for preventing a male connector and a female connector from being separated by twist force transmitted to the connector even when a tube connected to the connector is twisted. <P>SOLUTION: The medical connector includes: the male connector 10 provided with a male connector body 12, a first tube 14, a hollow needle 16, and a cylindrical part 24 having a projection part 20 to be inserted to the first groove part 18 of the male connector body 12 formed at an upstream end part and having a pawl part 22 projected to the inner side formed at a downstream end part; and the female connector 40 provided with a female connector body 42, a second tube 44, a funnel member 46, a rubber member 48 and a pressing member 49; for which a second groove part 54 for locking the pawl part 22 of the cylindrical part 24 of the male connector 10 is formed on the female connector body 42, a third groove part 58 is formed on the outer periphery on the downstream side of the second groove part 54, and a fourth groove part 62 is formed continuously from the third groove part 58. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a medical connector composed of a male connector and a female connector used for connecting a medical infusion tube.

  Conventionally, for example, as a connector for connecting two tubes used for medical treatment, a first connector member having a tube connected to an indwelling needle at the proximal end and a second connector having a tube connected to an infusion bag at the proximal end The following medical connectors composed of members are known (see Patent Document 1).

  The first connector member is provided in the outer tube portion, the inner tube portion located in the outer tube portion and communicating with the inside of the first tube connection portion, and protrudes inward of the outer tube portion. And a second connector member. The second connector member can be inserted into the outer tube portion and can store the inner tube portion therein. The second connector member is provided on the outer surface of the tube portion and has a tubular shape. First engaging portion engaging guide groove extending in the axial direction of the first portion, a first engaging portion rotating groove connected to the guiding groove at a predetermined angle, and a first engagement connecting to the rotating groove at a predetermined angle And a second engaging portion formed so as to divide the first engaging portion engaging groove and the rotating groove so as to be engaged with the first engaging portion. Is.

  In this structure, the first connector member and the second connector member are connected in such a manner that the first engaging portion of the first connector member is pushed into the second connector member, and the axial direction of the cylindrical portion of the second connector member. The first engagement portion engaging guiding groove extending in the direction of the first engagement portion is engaged with the first engaging portion rotation groove that is connected to the guiding groove at a predetermined angle by overcoming the second engagement portion of the second connector member. Is made by Further, the first connector member and the second connector member are separated from each other by rotating the first connector member so as to get over the holding rib formed in the turning groove of the second connector member. This is done by being guided and pulled out by the first engaging portion detaching guide groove to be connected.

Japanese Patent No. 3382053

  However, in the above prior art, the tube connected to the connector is twisted and the torsional force transmitted to the connector causes the first connector member to rotate so as to get over the holding rib of the rotation groove of the second connector member. There is a problem that the first connector member and the second connector member may be separated.

  In view of the above problems, an object of the present invention is to provide a medical connector in which a male connector and a female connector are not separated by a torsional force transmitted to the connector even if a tube connected to the connector is twisted. And

  The medical connector of the present invention is a medical connector composed of a male connector and a female connector used for connection of a medical infusion tube, wherein the male connector side is an upstream side and the female connector side is a downstream side. The male connector is cylindrical and has a male connector body in which a first groove is formed over the entire circumference of the outer periphery at a predetermined distance upstream from the downstream end connected to the female connector, A first tube connected to the upstream portion of the male connector main body, a first passage provided in the male connector main body and communicating with the first tube on the upstream side of the male connector main body and the downstream side; A protruding portion to be inserted into the first groove portion is formed at the upstream end portion, and a cylindrical portion formed with a claw portion protruding inward at the downstream end portion; and the female connector is cylindrical There is a male connector on top A second groove portion is formed on the outer periphery on the downstream side of the predetermined distance from the end to engage the claw portion of the cylindrical portion of the male connector, and the male groove extends over the entire outer periphery on the downstream side of the second groove portion. A female connector main body formed with a third groove portion that can engage with a claw portion of a cylindrical portion of the connector, and a fourth groove portion that is continuous from the third groove portion and extends toward the upstream side; A second tube connected to a downstream portion of the connector main body, and a second passage provided in the female connector main body and communicating with the first tube on the downstream side of the female connector main body and the upstream side. , By inserting the female connector into the cylindrical portion of the male connector, the first passage of the male connector and the second passage of the female connector are connected to each other of the male connector main body. 1 tube communicates with the second tube of the female connector Both of the claws of the cylindrical portion of the male connector main body are engaged with the second groove portion of the female connector so as to be movable downstream, and the protruding portion of the cylindrical portion of the male connector and the male connector main body The male connector and the female connector, in which the protruding portion of the cylindrical portion of the male connector and the first groove portion of the male connector main body are relatively rotatable about an axis by engaging with the first groove portion. And the male connector is pushed downstream with respect to the female connector so that the cylindrical portion of the male connector enters the third groove of the female connector, and the male connector is inserted into the female connector. The male connector and the female connector are separated by guiding the cylindrical portion of the male connector from the third groove portion to the fourth groove portion and pulling it out. Features.

  According to the present invention, by inserting the female connector into the cylindrical portion of the male connector, the passage of the male connector and the passage of the female connector are connected, and the first tube of the male connector body and the first of the female connector are connected. The two tubes communicate with each other, the claw portion of the cylindrical portion of the male connector main body is non-rotatably locked in the second groove portion of the female connector, and the protruding portion of the cylindrical portion of the male connector and the first of the male connector main body The male connector and the female connector are coupled so that the protruding portion of the cylindrical portion of the male connector and the first groove portion of the male connector main body can be relatively rotated about the axis. The

  On the other hand, by pushing the male connector downstream with respect to the female connector, the claw portion of the cylindrical portion of the male connector enters the third groove portion of the female connector, and the male connector is inserted into the third groove portion of the female connector. Then, the male connector and the female connector are separated by introducing and pulling out the claw portion of the cylindrical portion of the male connector into the fourth groove portion.

  Therefore, even if the tube connected to the connector is twisted, the projecting portion of the cylindrical portion of the male connector and the first groove portion of the male connector body can be relatively rotated around the axis by the torsional force transmitted to the connector. The male connector and the female connector are prevented from separating.

  In the present invention, the axial width of the first groove portion of the male connector is formed larger than the axial width of the protruding portion of the cylindrical portion of the male connector, and the cylindrical portion is formed with respect to the male connector body. When the male connector and the female connector are connected and the tubular portion is on the upstream side, the claw portion is located in the second groove portion, and the tubular portion is movable to an upstream position and a downstream position. When it is on the downstream side, it is preferable that the claw portion is located in the third groove portion.

  According to this aspect, the claw part of the cylindrical part of the male connector enters the third groove part from the second groove part of the female connector by pushing the cylindrical part of the male connector in the direction of the female connector.

  The medical connector of the present invention is a medical connector composed of a male connector and a female connector used for connecting a medical infusion tube, wherein the male connector side is the upstream side and the female connector side is the downstream side. The male connector is provided on the male connector main body, the male connector main body formed in a cylindrical shape, a first tube connected to the upstream portion of the male connector main body, and the male connector main body. A first passage communicating with the first tube on the upstream side of the main body and the downstream side; a diameter larger than that of the male connector main body, extending from the axial intermediate portion to the downstream side, and inward to the downstream end portion; A female connector main body having a cylindrical portion and a fifth groove portion and a sixth groove portion formed on an outer periphery thereof, and the female connector main body. In contact with the downstream And a second passage provided in the female connector body and communicating with the first tube on the downstream side of the female connector body and the upstream side thereof, The groove portion 5 has a diameter that increases from the upstream side toward the downstream side and is inclined to make the claw portion of the cylindrical portion immovable to the upstream side, and the claw portion of the cylindrical portion is locked in the circumferential direction. And a sixth groove portion of the female connector body extends upstream from an intermediate portion of the inclined surface of the fifth groove portion and upstream of the fifth groove portion. When the male connector and the female connector have a step, the claw portion of the cylindrical portion is locked to the fifth groove portion, and the male connector and the female connector are relatively rotated. Sometimes when the male connector and the female connector are separated from each other, The cylindrical portion is rotated while being pushed downstream with respect to the female connector, and the claw portion can be guided to the sixth groove portion and can be pulled out while avoiding contact with the step. It is characterized by that.

According to the present invention, the female connector includes a female connector main body formed in a cylindrical shape and having a fifth groove portion and a sixth groove portion formed on the outer periphery, and a second tube connected to the downstream portion of the female connector main body. The second tube provided in the female connector body and the first tube on the downstream side of the female connector body communicates with the upstream side,
The fifth groove portion of the female connector main body is inclined with the diameter increasing from the upstream side toward the downstream side, the claw portion of the cylindrical portion cannot be moved to the upstream side, and the claw portion of the cylindrical portion is made circular. Having a protrusion that locks in the circumferential direction to prevent rotation;
The sixth groove portion of the female connector main body extends upstream from the intermediate portion of the inclined surface of the fifth groove portion and has a step with the upstream side of the fifth groove portion,
When connecting the male connector and the female connector, the claw portion of the cylindrical portion is locked to the fifth groove, and when the male connector and the female connector rotate relative to each other, the upward rotation is prevented at the step,
When the male connector and the female connector are separated, the cylindrical portion is rotated while being pushed downstream with respect to the female connector, and the claw portion is guided to the sixth groove portion while avoiding contact with the step. It is possible to pull it out.

  Therefore, even if the tube connected to the connector is twisted, the claw portion of the cylindrical portion of the male connector body and the fifth groove portion of the female connector body can be relatively rotated about a predetermined angle axis by the torsional force transmitted to the connector. Therefore, the male connector and the female connector are prevented from being separated.

  In the present invention, the cylindrical portion of the male connector is formed with a protruding portion inserted into a first groove portion formed on the outer periphery of the downstream end portion of the male connector main body at the upstream end portion and the downstream end portion. It is preferable that a claw portion protruding inward is formed.

  According to this aspect, even if the tube connected to the connector is twisted, the cylindrical portion of the male connector body and the first groove portion of the female connector body are rotated about a predetermined angle axis by the torsional force transmitted to the connector. Since the relative rotation is possible and the protruding portion of the cylindrical portion of the male connector and the first groove portion of the male connector main body are relatively rotatable, the male connector and the female connector are prevented from being separated.

It is a figure which shows the male connector of the medical connector of 1st Embodiment which concerns on this invention. It is a figure which shows the cylindrical part in the male connector of the medical connector of 1st Embodiment. It is a figure which shows the method of engaging the cylindrical part in the male connector of the medical connector of 1st Embodiment with a male connector main body. It is a figure which shows the female connector of the medical connector of 1st Embodiment. It is a figure which shows the state by which the male connector and female connector of the medical connector of 1st Embodiment are connected. It is a figure which shows the state from which the male connector and female connector of the medical connector of 1st Embodiment are isolate | separated. It is a figure which shows the male connector of the medical connector of 2nd Embodiment. It is a figure which shows the female connector of the medical connector of 2nd Embodiment. It is a figure which shows the state by which the male connector and female connector of the medical connector of 2nd Embodiment are connected. It is a figure which shows the state from which the male connector and female connector of the medical connector of 2nd Embodiment are isolate | separated. It is a figure which shows the state by which the male connector and female connector of the medical connector of 3rd Embodiment are connected. It is a figure which shows the state from which the male connector and female connector of the medical connector of 3rd Embodiment are isolate | separated.

[First embodiment]
The medical connector of the present invention includes a male connector and a female connector. In the following description, the male connector is the upstream side and the female connector is the downstream side in a state where the male connector and the female connector are connected.
With reference to FIG. 1, the male connector 10 of the medical connector of 1st Embodiment is demonstrated. FIG. 1A is a front view and a side view of the male connector 10, and FIG. 1B is a side sectional view of the male connector 10.

  The male connector 10 includes a male connector main body 12, a first tube 14 inserted downstream from the central portion of the upstream end surface of the male connector main body 12, and a first tube at the central portion of the downstream end surface of the male connector main body 12. 14 and the hollow needle (first passage) 16 provided so that the downstream end is formed obliquely and protrudes downstream, and the entire circumference of the outer periphery of the downstream end of the male connector body 12 A projecting portion 20 to be inserted into the first groove portion 18 formed in this way is formed at the upstream end portion, and a cylindrical portion 24 is formed with a claw portion 22 projecting inward at the downstream end portion. .

  The male connector body 12 includes a first cylindrical portion 26 on the downstream side and a second cylindrical portion 28 on the upstream side. A first groove portion 18 is formed on the side surface of the first cylindrical portion 26 over the entire outer periphery. A hole 30 provided with the hollow needle 16 is formed on the upstream side in the axial direction from the central portion of the downstream end surface of the first cylindrical portion 26. Further, the second cylindrical portion 28 is formed with a hole 32 into which the first tube 14 is inserted from the central portion of the upstream end surface to the hole 30 on the downstream side in the axial direction.

  Referring to FIG. 2, FIG. 2 (a) is a front view and a side view of the cylindrical portion 24, FIG. 2 (b) is a IIb-IIb sectional view of FIG. 2 (a), and FIG. It is IIc-IIc sectional drawing of 2 (a). The cylindrical portion 24 is formed with a protruding portion 20 that protrudes symmetrically on the radially inner side of the upstream end portion. In addition, a claw portion 22 that protrudes symmetrically is formed on the radially inner side of the downstream end portion orthogonal to the protruding portion 20 of the upstream end portion. Grooves 34 are formed at both ends of the projecting portion 20 so as to extend a predetermined distance downstream. Grooves 36, 36 are formed at both ends of the claw portion 22 so as to extend a predetermined distance upstream.

  A method of connecting the male connector main body 12 and the cylindrical portion 24 will be described with reference to FIG. FIG. 3A shows a state in which the protruding portion 20 of the cylindrical portion 24 is in contact with the chamfered portion 38 formed at the downstream end portion of the male connector main body 12. FIG. 3B shows a state where the male connector main body 12 and the cylindrical portion 24 are connected. The male connector main body 12 and the cylindrical portion 24 are connected by bringing the protruding portion 20 of the cylindrical portion 24 into contact with the chamfered portion 38 formed at the downstream end of the male connector main body 12. In contrast, the protrusion 20 of the tubular portion 24 is inserted into the first groove portion 18 of the male connector body 12 by being pushed upstream. At this time, the protruding portion 20 of the cylindrical portion 24 is formed to extend downstream from the protruding portion 20 by a predetermined distance so that the protruding portion 20 bends outward along the outer diameter of the first cylindrical portion 26 of the male connector body 12. The groove portions 34, 34 are active. Further, the axial width of the first groove portion 18 of the male connector 10 is formed larger than the axial width of the protruding portion 20 of the cylindrical portion 24 of the male connector 10.

  Next, with reference to FIG. 4, the female connector 40 of the medical connector of 1st Embodiment is demonstrated. 4A is a front view and a side view of the female connector 40, FIG. 4B is a cross-sectional view taken along IVb-IVb in FIG. 4A, and FIG. 2B is a view taken along IVc-IVc in FIG. It is sectional drawing.

  The female connector 40 includes a female connector main body 42, a second tube 44 inserted upstream from the central portion of the downstream end surface of the female connector main body 42, and a second portion at the central portion of the upstream end portion of the female connector main body 42. A funnel member (second passage) 46 provided so as to communicate with the tube 44, a conical rubber member 48 fitted to the funnel member 46, and an upstream end of the funnel member 46 An annular pressing member 49 is provided that presses the rubber member 48 against the funnel member 46.

  The female connector main body 42 is formed in a hollow frustoconical shape. The female connector main body 42 is formed with a hole 50 into which the second tube 44 is inserted on the upstream side in the axial direction from the central portion of the downstream end surface. A hole 52 into which the funnel member 46 is inserted is formed on the downstream side in the axial direction from the central portion of the upstream end surface.

  On the outer periphery of the female connector main body 42, a second groove portion 54 is formed in which the claw portion 22 of the cylindrical portion 24 of the male connector 10 is locked. The second groove portion 54 has a wedge-shaped cross section at the center in the axial direction, and is formed in a rectangular shape in a side view. Further, a concave surface 56 for introducing the claw portion 22 of the cylindrical portion 24 of the male connector 10 into the second groove portion 54 is formed. The concave surface 56 is formed in an inverted triangular shape having a maximum diameter to a small diameter in a side view. Further, on the downstream side of the second groove portion 54, a third groove portion 58 that can engage with the claw portion 22 of the cylindrical portion 24 of the male connector 10 is formed. The third groove portion 58 is formed between the rear wall of the second groove portion 54 and the flange portion 60 formed on the outer periphery of the central portion in the axial direction of the female connector main body 42. Further, a fourth groove portion 62 having a triangular shape is formed continuously from the third groove portion 58 in a side view that is symmetrical in an arc shape in a direction orthogonal to the axial direction. In addition, a protrusion 64 is formed between the concave surface 56 and the fourth groove 62.

  Next, with reference to FIG.5 and FIG.6, the connection and isolation | separation method of the medical connector of this embodiment is demonstrated.

  FIG. 5A shows a state before the male connector 10 and the female connector 40 are connected. FIG. 5B shows a state where the male connector 10 and the female connector 40 are connected.

  Referring to FIG. 5A, before the male connector 10 and the female connector 40 are connected, the male connector 10 is inserted by inserting the female connector 40 into the cylindrical portion 24 of the male connector 10. The claw portion 22 of the cylindrical portion 24 of the male connector 10 rides on the concave surface 56 of the female connector main body 42 and is pushed downstream in the axial direction. At this time, the claw portion 22 bends outward by the action of the grooves 36 and 36 formed at both ends of the claw portion 22 of the cylindrical portion 24 of the male connector 10. Further, the hollow needle 16 of the male connector 10 is inserted into the rubber member 48 through the central portion of the pressing member 49.

  With reference to FIG. 5B, in a state where the male connector 10 and the female connector 40 are connected, the claw portion 22 of the tubular portion 24 of the male connector 10 is formed in the second groove portion 54 of the female connector main body 42. Locked. Further, the hollow needle 16 of the male connector 10 passes through the rubber member 48, and the first tube 14 of the male connector 10 and the second tube 44 of the female connector 40 are communicated with each other. At this time, in order to push the male connector main body 42 into the female connector 40, the tubular portion 24 of the male connector 10 is engaged with the second groove portion 54 of the female connector main body 42, and the downstream end surface of the male connector 10 and the female connector 44 are engaged. Stops when the upstream end face of struck.

  Further, since the protruding portion 20 of the cylindrical portion 24 of the male connector 10 is inserted into the first groove portion 18 of the male connector main body 12, the protruding portion 20 of the cylindrical portion 24 of the male connector 10 and the male connector main body 12. The first groove 18 is relatively rotatable about the axis.

  FIG. 6A shows a first state in which the male connector 10 and the female connector 40 are separated. FIG. 6B shows a second state in which the male connector 10 and the female connector 40 are separated.

  6A, in the first state in which the male connector 10 and the female connector 40 are separated, the cylindrical portion 24 of the male connector 10 from the state in which the male connector 10 and the female connector 40 are coupled. Is pushed into the downstream side in the axial direction so that the claw portion 22 of the cylindrical portion 24 of the male connector 10 is inserted into the third groove portion 58 formed on the downstream side in the axial direction of the second groove portion 54 of the female connector body 42. I have entered.

  6B, in the second state where the male connector 10 and the female connector 40 are separated, the claw portion 22 of the cylindrical portion 24 of the male connector 10 is the third groove portion of the female connector main body 42. The male connector 10 is guided and pulled along the fourth groove portion 62 from the state of entering 58. Further, when the male connector 10 is pulled upstream in the axial direction, the female connector 40 is formed in a hollow frustoconical shape. Therefore, the male connector 10 and the female connector 40 cross over the protrusion 64 at the upstream end. To be separated.

  As described above, according to the present embodiment, by inserting the female connector 40 into the cylindrical portion 24 of the male connector 10, the claw portion 22 of the cylindrical portion 24 of the male connector 10 is connected to the second portion of the female connector main body 42. The male connector 10 and the female connector 40 are engaged with each other so that the protruding portion 20 of the tubular portion 24 of the male connector 10 and the first groove portion 18 of the male connector main body 12 are relatively rotatable about the axis. Are concatenated.

  On the other hand, the cylindrical portion 24 of the male connector 10 is pushed downstream, and the claw portion 22 of the cylindrical portion 24 enters the third groove 58 of the female connector main body 42, so that the cylindrical portion 24 of the male connector 10 is inserted into the female connector. By pulling along the fourth groove 62 of the main body 42, the male connector 10 and the female connector 40 are separated.

  Therefore, even if the tube connected to the connector is twisted, the protruding portion 20 of the cylindrical portion 24 of the male connector 10 and the first groove portion 18 of the male connector main body 12 are relatively rotated around the axis by the torsional force transmitted to the connector. Since it is possible, it is prevented that the male connector 10 and the female connector 40 isolate | separate.

[Second Embodiment]
Next, the medical connector of the second embodiment will be described. In addition, the same thing as 1st Embodiment attaches the same code | symbol, and abbreviate | omits description.

  With reference to FIG. 7, the male connector 70 of the medical connector of 2nd Embodiment is demonstrated. 7A is a front view and a side view of the male connector 70, and FIG. 7B is a side sectional view of the male connector 70.

  The male connector 70 includes a male connector main body 72, a first tube 14 inserted downstream from the central portion of the upstream end surface of the male connector main body 72, and a first tube upstream from the axial central portion of the male connector main body 72. A hollow needle (first passage) 16 that is communicated with one tube 14 and has a downstream end formed obliquely and projecting downstream, and downstream from the end of the downstream end surface of the male connector main body 72 And a cylindrical portion 76 formed with a claw portion 74 that extends inward and protrudes inwardly at the downstream end portion.

  The male connector main body 72 includes a cylindrical portion 76, a first cylindrical portion 78, and a second cylindrical portion 80. At both ends of the claw portion 74 of the cylindrical portion 76, groove portions 82 and 82 are formed extending a predetermined distance upstream. A hole 84 in which the hollow needle 16 is provided is formed on the upstream side in the axial direction from the central portion of the downstream end surface of the first cylindrical portion 78. The second cylindrical portion 80 has a hole 86 into which the first tube 14 is inserted from the central portion of the downstream end surface to the hole 84 on the upstream side in the axial direction.

  Next, with reference to FIG. 8, the female connector 88 of the medical connector of 2nd Embodiment is demonstrated. 8A is a front view and a side view of the female connector 88, FIG. 8B is a cross-sectional view taken along the line VIIIb-VIIIb of FIG. 8A, and FIG. 8B is a line VIIIc-VIIIc of FIG. It is sectional drawing.

  The female connector 88 includes a female connector main body 90, a second tube 44 inserted upstream from the central portion of the downstream end surface of the female connector main body 90, and a second portion at the central portion of the upstream end portion of the female connector main body 90. A funnel member (second passage) 46 provided so as to communicate with the tube 44, a conical rubber member 48 fitted to the funnel member 46, and an upstream end of the funnel member 46 An annular pressing member 49 is provided that presses the rubber member 48 against the funnel member 46.

  The female connector main body 90 is formed in a cylindrical shape. The female connector main body 90 is formed with a hole 92 into which the second tube 44 is inserted on the upstream side in the axial direction from the central portion of the downstream end surface. Further, a hole 94 into which the funnel member 46 is inserted is formed on the downstream side in the axial direction from the central portion of the upstream end surface.

  A fifth groove 96 is formed on the outer periphery of the female connector main body 90 to engage the claw 74 of the cylindrical portion 76 of the male connector main body 72. Further, a curved surface 100 for introducing the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 into the groove portion 96 is formed. The curved surface 100 is an outer periphery that forms the female connector body 90 in a hollow frustoconical shape from the upstream side to the downstream side of the female connector body 90. The groove portion 96 is inclined so as to increase in diameter from the upstream side toward the downstream side in the axial direction, and the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 is formed to be movable downstream. A flange 98 is formed on the downstream side in the axial direction of the groove 96 of the female connector main body 90 so as to protrude to the outer periphery.

  The fifth groove portion 96 is formed with a protruding portion 102 that prevents the rotation of the male connector 70 symmetrically on the outer side in the radial direction. In addition, the curved surface 100 is formed with a first wall portion 104 extending from the protruding portion 102 toward the upstream end, and a first wall portion 104 and a second wall portion 106 at predetermined intervals in the radial direction. ing.

  Further, the downstream end portion extends between the protrusion 102 and the first wall portion 104 and the second wall portion 106 from the intermediate portion of the inclined surface of the fifth groove portion 96 to the upstream side, and the fifth groove portion 96. And a sixth groove having a step is formed.

  Next, with reference to FIG.9 and FIG.10, the connection and isolation | separation method of the medical connector of this embodiment is demonstrated.

  FIG. 9A shows a state before the male connector 70 and the female connector 88 are connected. FIG. 9B shows a state where the male connector 70 and the female connector 88 are connected.

  Referring to FIG. 9A, before the male connector 70 and the female connector 88 are connected, the female connector 88 is inserted into the cylindrical portion 76 of the male connector main body 72 to thereby connect the female connector main body. The claw portion 74 of the cylindrical portion 76 of the male connector main body 72 rides on the curved surface 100 of 90 and is pushed downstream in the axial direction. At this time, the claw portion 74 is bent outward by the action of the grooves 82 and 82 formed at both ends of the claw portion 74 of the cylindrical portion 76 of the male connector main body 72. Further, the hollow needle 16 of the male connector 70 is inserted into the rubber member 48 through the central portion of the pressing member 49.

  With reference to FIG. 9B, in a state where the male connector 70 and the female connector 88 are connected, the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 is connected to the fifth groove portion 96 of the female connector main body 90. Is engaged. Further, the hollow needle 16 of the male connector 70 penetrates the rubber member, and the first tube 14 of the male connector 70 and the second tube 44 of the female connector 88 are communicated with each other.

  Further, the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 is engaged with the fifth groove portion 96 formed on the outer periphery of the female connector main body 90, and thus the cylindrical portion 76 of the male connector main body 72. The claw portion 74 and the fifth groove portion 96 of the female connector main body 90 are relatively rotatable around a predetermined angle axis.

  FIG. 10A shows a first state in which the male connector 70 and the female connector 88 are separated. FIG. 10B shows a second state in which the male connector 70 and the female connector 88 are separated.

  Referring to FIG. 10A, in the first state where the male connector 70 and the female connector 88 are separated, the male connector 70 and the female connector 88 are connected and the claws of the cylindrical portion 76 of the male connector main body 72 are connected. By pushing the male connector 70 to the downstream side in the axial direction from the state where the portion 74 is engaged with the upstream side of the fifth groove portion 96 of the female connector main body 90, the claw portion of the cylindrical portion 76 of the male connector main body 72 74 moves downstream in the axial direction of the fifth groove 96 of the female connector main body 90.

  Referring to FIG. 10B, in the second state where male connector 70 and female connector 88 are separated from each other, fifth groove portion 96 and the first groove portion 96 from the first state until male connector 70 abuts against protruding portion 102. The claw portion 74 of the cylindrical portion 76 of the male connector main body 72 is guided to the sixth groove portion 108 and pulled upstream. Further, when the male connector 70 is pulled upstream in the axial direction, the male connector 70 and the female connector 88 are separated.

  As described above, in the present embodiment, the female connector 88 is inserted into the cylindrical portion 76 of the male connector main body 72, so that the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 is the fifth connector of the female connector main body 90. The male connector 70 and the female connector 70 are engaged with the groove portion 96 so that the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 and the fifth groove portion 96 of the female connector main body 90 can rotate relative to each other about a predetermined angle axis. The connector 88 is connected.

  On the other hand, the male connector main body 72 is pushed and rotated downstream, and the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 is pulled upstream along the sixth groove portion 108, whereby the male connector 70 and the female connector 88 are connected. Are separated.

  Therefore, even if the tube connected to the connector is twisted, the claw portion 74 of the cylindrical portion 76 of the male connector main body 72 and the groove portion 96 of the female connector main body 90 are relative to each other about a predetermined angle axis by the torsional force transmitted to the connector. Since it is rotatable, the male connector 70 and the female connector 88 are prevented from being separated.

[Third embodiment]
Next, the medical connector of 3rd Embodiment is demonstrated. In addition, the same thing as 1st Embodiment or 2nd Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description. In the medical connector of the third embodiment, the male connector 70 of the second embodiment is changed to the male connector 10 of the first embodiment, and the female connector 88 of the second embodiment is applied.

  With reference to FIG.11 and FIG.12, the connection and isolation | separation method of the medical connector of 3rd Embodiment is demonstrated.

  FIG. 11A shows a state before the male connector 10 and the female connector 88 are connected. FIG. 11B shows a state where the male connector 10 and the female connector 88 are connected.

  Referring to FIG. 11A, before the male connector 10 and the female connector 88 are connected, the male connector 10 is inserted into the tubular portion 24 of the male connector 10 to The claw portion 22 of the tubular portion 24 of the male connector 10 rides on the curved surface 100 of the female connector main body 90 and is pushed downstream in the axial direction. At this time, the claw portion 22 bends outward by the action of the grooves 36 and 36 formed at both ends of the claw portion 22 of the cylindrical portion 24 of the male connector 10. Further, the hollow needle 16 of the male connector 10 is inserted into the rubber member 48 through the central portion of the pressing member 49.

  With reference to FIG. 11B, in a state where the male connector 10 and the female connector 88 are connected, the claw portion 22 of the tubular portion 24 of the male connector 10 is formed in the fifth groove portion 96 of the female connector main body 90. Is engaged. Further, the hollow needle 16 of the male connector 10 penetrates the rubber member 48, and the first tube 14 of the male connector 10 and the second tube 44 of the female connector 88 communicate with each other.

  FIG. 12A shows a first state where the male connector 10 and the female connector 88 are separated. FIG. 12B shows a second state where the male connector 10 and the female connector 88 are separated.

  Referring to FIG. 12A, in the first state where male connector 10 and female connector 88 are separated, male connector 10 and female connector 88 are connected, and the claw portion of tubular portion 24 of male connector 10 is connected. When the male connector 10 is pushed into the downstream side in the axial direction from the state where 22 is engaged with the upstream side of the fifth groove portion 96 of the female connector main body 90, the claw portion 22 of the cylindrical portion 24 of the male connector 10 is It moves to the downstream side in the axial direction of the fifth groove 96 of the female connector main body 90.

  Referring to FIG. 12B, in the second state in which male connector 10 and female connector 88 are separated, the male connector 10 is rotated from the first state until it abuts against protruding portion 102, and The claw portion 22 of the cylindrical portion 24 is introduced into the sixth groove portion 108 and pulled upstream. Further, the male connector 10 and the female connector 88 are separated by pulling the male connector 10 toward the upstream side in the axial direction.

  As described above, according to the present embodiment, since the male connector 10 of the first embodiment and the female connector 88 of the second embodiment are applied, the twist transmitted to the connector even if the tube connected to the connector is twisted. The claw portion 74 of the cylindrical portion 76 of the male connector main body 72 and the fifth groove portion 96 of the female connector main body 90 can be rotated relative to each other about a predetermined angle axis by force, and the protruding portion 20 of the male connector 10 and the male connector Since the first groove portion 18 of the connector 10 is relatively rotatable about the axis, the male connector 10 and the female connector 88 are prevented from being separated.

  DESCRIPTION OF SYMBOLS 10 ... Male connector, 12 ... Male connector main body, 14 ... 1st tube, 16 ... Hollow needle, 18 ... 1st groove part, 20 ... Projection part, 22 ... Nail | claw part, 24 ... Cylindrical part, 26 ... 1st Cylindrical part, 28 ... second cylindrical part, 30 ... hole, 32 ... hole, 34 ... groove part, 36 ... groove part, 38 ... chamfered part, 40 ... female connector, 42 ... female connector body, 44 ... second tube, 46 ... funnel member 48 ... rubber member 49 ... pressing member 50 ... hole 52 ... hole 54 ... second groove 56 ... concave surface 58 ... third groove 60 ... collar part 62 ... fourth Groove part, 64 ... projecting part, 70 ... male connector, 72 ... male connector body, 74 ... claw part, 76 ... cylindrical part, 78 ... first cylindrical part, 80 ... second cylindrical part, 82 ... groove part, 84 ... Hole 86 86 Hole 88 Female connector 90 Female connector main body 92 Hole 94 94 Hole 96 Fifth groove 9 ... flange portion, 100 ... curved surface 102 ... protrusions 104 ... first wall portion, 106 ... second wall, 108 ... groove portion of the sixth.

Claims (4)

A medical connector composed of a male connector and a female connector used for connection of a medical infusion tube, when the male connector side is the upstream side and the female connector side is the downstream side,
The male connector is
A male connector body that is cylindrical and has a first groove formed over the entire circumference of the outer periphery at a predetermined distance upstream from the downstream end connected to the female connector;
A first tube connected to an upstream portion of the male connector body;
A first passage provided in the male connector main body and communicating with the first tube on the upstream side of the male connector main body and the downstream side;
A projecting portion to be inserted into the first groove portion is formed at the upstream end portion, and has a cylindrical portion formed with a claw portion projecting inward at the downstream end portion;
The female connector is
A second groove is formed on the outer periphery of the cylindrical connector at a predetermined distance downstream from the upstream end connected to the male connector. The second groove engages with the claw of the cylindrical portion of the male connector, and is downstream of the second groove. A third groove portion is formed which can engage the claw portion of the cylindrical portion of the male connector over the entire circumference of the outer peripheral side, and extends from the third groove portion toward the upstream side. A female connector body formed with,
A second tube connected to the downstream portion of the female connector body;
A second passage provided in the female connector body and communicating with the first tube on the downstream side of the female connector body and the upstream side;
By inserting the female connector into the cylindrical portion of the male connector, the first passage of the male connector and the second passage of the female connector are connected to each other, and the first of the male connector main body is connected. The tube of the female connector and the second tube of the female connector, and the claw portion of the cylindrical portion of the male connector main body is engaged with the second groove portion of the female connector so as to be movable downstream, The protruding portion of the tubular portion of the male connector and the first groove portion of the male connector body are engaged with each other by engaging the protruding portion of the tubular portion of the connector with the first groove portion of the male connector body. The male connector and the female connector that are rotatable relative to each other are connected to each other, and the male connector is pushed downstream with respect to the female connector, whereby the claw portion of the cylindrical portion of the male connector is connected to the female connector. 3 to enter the groove portion, By rotating the connector with respect to the female connector and pulling out the claw portion of the cylindrical portion of the male connector from the third groove portion to the fourth groove portion, the male connector and the female connector are pulled out. A medical connector characterized by being separated. The medical connector according to claim 1,
The axial width of the first groove portion of the male connector is formed larger than the axial width of the protruding portion of the cylindrical portion of the male connector, and the cylindrical portion is located upstream and downstream of the male connector body. When the male connector and the female connector are connected and the cylindrical portion is upstream, the claw portion is positioned in the second groove portion, and the cylindrical portion is downstream Is a medical connector, wherein the claw portion is located in the third groove portion. A medical connector composed of a male connector and a female connector used for connection of a medical infusion tube, when the male connector side is the upstream side and the female connector side is the downstream side,
The male connector is
A male connector body formed in a cylindrical shape;
A first tube connected to an upstream portion of the male connector body;
A first passage provided in the male connector main body and communicating with the first tube on the upstream side of the male connector main body and the downstream side;
A cylindrical portion having a diameter larger than that of the male connector main body and extending from the axial intermediate portion to the downstream side and having a claw portion protruding inward at the downstream end portion;
The female connector is
A female connector body formed in a cylindrical shape and having a fifth groove portion and a sixth groove portion formed on the outer periphery;
A second tube connected to the downstream portion of the female connector body;
A second passage provided in the female connector main body and communicating with the first tube on the downstream side of the female connector main body and the upstream side;
The fifth groove portion of the female connector main body is inclined by increasing the diameter from the upstream side toward the downstream side, the claw portion of the cylindrical portion cannot be moved to the upstream side, and the claw portion of the cylindrical portion is Having protrusions that lock in the circumferential direction to prevent rotation;
The sixth groove portion of the female connector main body extends upstream from the intermediate portion of the inclined surface of the fifth groove portion and has a step with the upstream side of the fifth groove portion,
When connecting the male connector and the female connector, the claw portion of the cylindrical portion is locked to the fifth groove portion, and the step is formed when the male connector and the female connector rotate relative to each other. Ascending rotation is blocked,
When separating the male connector and the female connector, the cylindrical portion is rotated while being pushed downstream with respect to the female connector, and the claw portion is prevented from coming into contact with the step. A medical connector characterized in that it can be pulled out by being guided into a groove portion. The medical connector according to claim 3,
The cylindrical part of the male connector has a protruding part inserted into a first groove part formed on the outer periphery of the downstream end part of the male connector main body and is formed at the upstream end part and protrudes inward to the downstream end part. A medical connector characterized in that a claw portion is formed.

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