JP6195341B2 - Medical connector - Google Patents

Description

  The present invention relates to a medical connector that connects a first tube (for example, a tube connected to an indwelling needle) and a second tube (for example, an infusion tube).

  An indwelling needle is used as an instrument for performing hemodialysis, infusion, blood transfusion or the like for treatment, and an infusion tube is connected to the indwelling needle using a medical connector.

  In this medical connector, the first tube and the second tube are moved and fitted in the axial direction, and then the first tube and the second tube are relatively moved in the circumferential direction orthogonal to the axis. It has been proposed to connect the first tube connected to the first tube and the second tube connected to the second tube by relatively rotating and locking. (For example, refer to Patent Document 1).

  Further, after the first tube and the second tube are moved and fitted in the axial direction, the pressing ring provided on the outer periphery of the second tube is engaged with the step portion of the first tube and locked. Then, the first tube connected to the first tube and the second tube connected to the second tube are connected by sandwiching the second tube with the first tube and the pressing ring. The thing of the structure which carries out is proposed (for example, refer patent document 2).

Japanese Patent No. 3382053 JP 2006-136479 A

  A conventional medical connector can secure a push-in amount for sealing the first tube and the second tube, but maintains a fitting between the first tube and the second tube. The configuration of was complicated.

  The present invention has been made in order to eliminate the above-described disadvantages, and it is possible to secure the pushing amount for sealing the first tube and the second tube, while the first tube and the second tube are sealed. It is an object of the present invention to provide a medical connector that can simplify the configuration of a lock mechanism that maintains the fitting.

(1) The medical connector according to the present invention is a medical connector for connecting the first tube and the second tube, and has an expanded inclined surface in which an inner peripheral surface on one end side expands toward the one end. A first male pipe having a lock male screw portion provided on the outer periphery of the one end and the first tube connected to the other end, and an outer peripheral surface on the other end side of the first pipe. A second tube with one end connected to the second tube, and an outer periphery of the second tube, the axial direction of the second tube and the second tube A lock female screw portion that is provided so as to be movable in the circumferential direction of the second tube, is prevented from slipping out to the other end side of the second tube, and is provided with a lock female screw portion that is screwed into the lock male screw portion on the other end side. The lock tube and an outer periphery of the first tube are provided so as to be movable in the axial direction of the first tube. And a first opposing member that is prevented from coming out to one end side of the first tube by coming into contact with the lock male screw portion, and a first engagement provided integrally with the first opposing member. And an outer periphery of the second tube or the outer periphery of the lock tube so as to be movable in the axial direction of the second tube and the axial direction of the lock tube, and in contact with the lock tube, the first tube A second opposing member that is prevented from slipping out to the other end of the second pipe, or that is prevented from slipping out to the other end of the lock pipe, and is provided integrally with the second opposing member; A second engagement portion that engages with the first engagement portion, and the engagement between the first engagement portion and the second engagement portion is the first engagement portion or It can be released by elastic deformation of the second engaging portion.

  (2) The medical connector according to the present invention is the medical connector according to (1), wherein the first opposing member is connected to the first opposing member and the first opposing member is connected to the first opposing tube. A first guide mechanism for guiding in the axial direction is provided.

(3) The medical connector according to the present invention is the medical connector according to (1) or (2) , wherein the first facing member is disposed on a surface of the first facing member facing the second facing member. A first guide portion extending in the axial direction inward, or a second guide portion extending in the axial direction into the second facing member on a surface of the second facing member facing the first facing member. A first guided portion that is provided and protrudes in an axial direction from the second facing member to a surface of the second facing member that faces the first facing member, and is guided by the first guiding portion; Alternatively, a second guided portion that protrudes in the axial direction from the second facing member and is guided by the second guiding portion is provided on a surface of the first facing member that faces the second facing member. It is characterized by being.

(4) The medical connector according to this invention is the medical connector according to any one of (1) to (3) , wherein the first engaging portion and the second engaging portion are The first opposing member and the second opposing member are engaged when they come into contact with each other.

  According to the medical connector of the present invention, the seal between the first tube and the second tube is achieved by fitting (engaging) the expanded inclined surface of the first tube and the contracted inclined surface of the second tube. Since the engagement between the first tube and the second tube is locked by the engagement between the first engagement portion and the second engagement portion, the first tube and the second tube are locked. It is possible to simplify the configuration of the lock mechanism that maintains the fitting between the first tube and the second tube while securing the amount of pushing for sealing the tube.

It is a longitudinal cross-sectional view in the coupling | bonding of the medical connector which is 1st Example of this invention, and a locked state. It is a perspective view of the 1st pipe | tube shown in FIG. It is a longitudinal cross-sectional view in the centerline position in the axial direction of the 1st pipe | tube shown in FIG. It is sectional drawing by the AA line of FIG. It is a perspective view of the 2nd pipe | tube shown in FIG. It is a longitudinal cross-sectional view in the centerline position in the axial direction of the 2nd pipe | tube shown in FIG. It is a perspective view of the lock pipe shown in FIG. It is a longitudinal cross-sectional view in the centerline position in the axial direction of the lock pipe shown in FIG. It is a perspective view of the 1st opposing member and 1st engaging part which were shown in FIG. It is a longitudinal cross-sectional view in the centerline in the axial direction of the 1st opposing member and 1st engaging part which were shown in FIG. It is sectional drawing by the BB line of the 1st opposing member shown in FIG. It is a perspective view of the 2nd opposing member and 2nd engaging part which were shown in FIG. It is a longitudinal cross-sectional view in the centerline in the axial direction of the 2nd opposing member shown in FIG. It is a longitudinal cross-sectional view in the unbonded state of the medical connector which is 1st Example of this invention. It is a longitudinal cross-sectional view in the unbonded state of the medical connector which is 2nd Example of this invention. It is a longitudinal cross-sectional view in the coupling | bonding and locked state of the medical connector which is 2nd Example of this invention. It is a longitudinal cross-sectional view in the unbonded state of the medical connector which is 3rd Example of this invention. It is a longitudinal cross-sectional view in the coupling | bonding of the medical connector which is 3rd Example of this invention, and a locked state. It is explanatory drawing which shows the structure of the medical connector which is 4th Example of this invention. It is explanatory drawing which shows the structure of the medical connector which is 5th Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a longitudinal sectional view of a medical connector according to a first embodiment of the present invention in a coupled and locked state, FIG. 2 is a perspective view of the first tube shown in FIG. 1, and FIG. 3 is a first view shown in FIG. FIG. 4 is a sectional view taken along line AA in FIG. 2, FIG. 5 is a perspective view of the second tube shown in FIG. 1, and FIG. FIG. 7 is a perspective view of the lock tube shown in FIG. 1, and FIG. 8 is the center of the lock tube shown in FIG. 7 in the axial direction. FIG. 9 is a perspective view of the first opposing member and the first engaging portion shown in FIG. 1, and FIG. 10 is the first opposing member and the first engaging portion shown in FIG. FIG. 11 is a sectional view taken along the line BB of the first opposing member shown in FIG. 9, and FIG. 12 is a sectional view of the second opposing member shown in FIG. Yo FIG. 13 is a perspective view of the second engaging portion, FIG. 13 is a longitudinal sectional view taken along the center line in the axial direction of the second opposing member shown in FIG. 12, and FIG. 14 is a medical connector according to the first embodiment of the invention. It is a longitudinal cross-sectional view in the unbonded state.

  The medical connector C according to the first embodiment of the present invention includes a first tube 11 (see FIGS. 2 to 4), a second tube 21 (see FIGS. 5 and 6), and a lock tube 31 (see FIG. 7 and FIG. 8), a first opposing member 41 (see FIGS. 9 to 11), a first engaging portion 51 (see FIGS. 9 and 10), and a second opposing member 61 (FIG. 12). And a second engaging portion 71 (see FIGS. 12 and 13).

  As shown in FIGS. 2 to 4, the inner peripheral surface of one end side (the right end side in FIGS. 2 and 3) of the first pipe 11 described above expands (expands) toward one end (the right end). It is an expanded inclined surface 12 (conical surface), and functions as a first opposing member retaining locking portion that prevents (blocks) the first opposing member 41 from slipping out from one end side on the outer periphery of one end (right end). The lock male screw portion 13 is provided, and the first tube T1 is connected to the other end side (the left end side in FIGS. 2 and 3).

  And the 1st pipe | tube 11 is provided with the protrusions 15 and 16 extended in an axial direction at intervals of 180 degree | times on the upper and lower outer periphery.

  The lock male screw portion 13 described above is a very short screw thread (for example, a 1/2 thread to a single thread), and a mountain part 13a that is provided to circulate and the other end side from the one end side to the mountain part 13a. And a trough portion 13b provided so as to rotate in a clockwise direction (when viewed from one end side (right side), the lock male screw portion 13 is rotated in the clockwise direction).

  As shown in FIGS. 5 and 6, the second tube 21 described above is a contracted inclined surface in which the outer peripheral surface on the other end side (left end side) is fitted to the expanded inner peripheral surface 12 of the first tube 11. 22 (a conical surface having a diameter reduced from one end side (right end side) to the other end (left end)), and the second tube T2 is connected to one end (right end).

  The second tube 21 has a looped retaining lock that prevents (blocks) the lock tube 31 from slipping out to the other end side (left end side) on the outer periphery on one end side (right end side) in the axial direction. A portion 23 is provided.

  The lock tube 31 described above is provided on the outer periphery of the second tube 21 so as to be movable in the axial direction of the second tube 21 and the circumferential direction of the second tube 21, and the other end side of the second tube 21 ( Locking that is prevented (blocked) by the retaining stopper 23 and is screwed into the lock male threaded portion 13 on the inner periphery of the other end (left end) as shown in FIGS. 7 and 8. An internal thread portion 32 is provided.

7 and 8, the lock pipe 31 prevents the second opposing member 61 from slipping out to the other end side (left end side) on the outer periphery of the other end (left end) in the axial direction ( The second opposing member retaining / locking part 34 is provided around the outer periphery on the one end side (right side) of the second opposing member retaining latch 34 as shown in FIG. A plurality of anti-slip ridges 35 extending in the axial direction are provided at predetermined intervals in the circumferential direction.
The number of the protrusions 35 may be one, or a plurality of protrusions 35 spaced apart.

As shown in FIGS. 9 to 11, the first opposing member 41 described above has a quadrangular prism shape, is provided on the outer periphery of the first tube 11 so as to be movable in the axial direction of the first tube 11, and is locked. It is prevented (blocked) from coming out to one end side (right end side) of the first tube 11 in contact with the male screw portion 13.
The first facing member 41 may be a polygonal column, a cylinder, or another shape in addition to a rectangular column shape.

The first facing member 41 has a structure guided by the first tube 11.
An example thereof includes the protrusions 15 and 16 of the first pipe 11, guided grooves 42 in which the protrusions 15 and 16 are fitted, and guided notches 43.
The guided groove 42 extends in the axial direction along the protrusion 15, and the guided notch 43 extends in the axial direction along the protrusion 16.
The first guide mechanism is constituted by the guided groove 42, the guided notch 43, and the protrusions 15 and 16, but other combinations may be used.

Further, the first facing member 41 preferably has an appropriate structure for guiding the second facing member 61.
One example is a cylindrical plurality of, for example, four columnar holes (first guide portions) 44A extending in the axial direction into the first opposing member 41 on the surface facing the second opposing member 61, and the first A plurality of quadrangular prisms extending in the axial direction into one opposing member 41, for example, two quadrangular column holes (first guide portions) 44B.

  As shown in FIGS. 9 and 10, the first engaging portion 51 described above is integrated with the upper surface of the first opposing member 41 and extends in parallel with the axial direction of the first opposing member 41. The second guide protrusions 52, 53 extend between the first guide protrusions 52 and the second guide protrusions 53 so as to be orthogonal to the first and second guide protrusions 52, 53. Between the engaging ridge 54 and the inclined ridge 55 which is inclined from the engaging ridge 54 to one end side (right end side) between the first guide ridge 52 and the second guide ridge 53. It is configured.

As shown in FIGS. 12 and 13, the second opposing member 61 described above has a quadrangular prism shape and is movable on the outer periphery of the lock tube 31 in the axial direction of the second tube 21 and the axial direction of the lock tube 31. In addition to being provided, the second opposing member retaining latch 34 prevents (blocks) the second tube 21 from slipping out to the other end side (left end side).
Similar to the first opposing member 41, the second opposing member 61 may be a polygonal column, a cylinder, or another shape in addition to the quadrangular prism shape.

  The second opposing member 61 is provided with a revolving accommodation recess 62 for accommodating the second opposing member retaining latch 34 of the lock pipe 31 on the other end side (left end side), and at the lower end. A notch 63 extending in the axial direction is provided.

  Further, the second facing member 61 has a surface facing the first facing member 41 on the side facing the first facing member 41 from the second facing member 61 (of the first and second facing members 41, 61). Four cylindrical protrusions (first guided portions) 65A that protrude in the axial direction and are guided by the four cylindrical holes 44A, and two four protrusions that protrude from the second opposing member 61 toward the first opposing member 41. Two quadrangular prism protrusions (first guided portions) 65B guided by the prismatic hole 44B are provided.

  As shown in FIGS. 12 and 13, the second engaging portion 71 described above is integrally formed on the upper surface of the second opposing member 61 from the second opposing member 61 in the axial direction (the first opposing member 41. Side) and an engaging portion 73 that is provided at the tip (other end) of the elastic piece 72 and engages with the engaging protrusion 54.

  The other end side (left end side) of the engaging portion 73 that faces the engaging protrusion 54 is not caught by the first opposing member 41, the inclined protrusion 55, and the engaging protrusion 54. Guided surface (inclined surface) 73a that inclines so as to rise toward the other end (inclined away from the first opposing member 41, the inclined ridge 55, and the engaging ridge 54). It is preferable that

Each member described above is assembled as shown in FIG.
That is, the first opposing member 41 is attached to the outer periphery of the first tube 11 with the ridge 15 positioned in the guided groove 42 and the ridge 16 positioned in the guided notch 43. The first tube T1 is attached to the other end side (left end side) of the first tube 11.

  A lock tube 31 is attached to the outer periphery of the second tube 21, a second opposing member 61 is attached to the outer periphery of the lock tube 31, and the second tube 21 is connected to one end side (right end side) of the second tube 21. The tube T2 is attached.

  Next, the connection (connection) of the medical connector C will be described.

  First, the other end side (left end side) of the second tube 21 is inserted into one end side (right end side) of the first tube 11, and the contracted inclined surface 22 is brought into contact with the expanded inclined surface 12. The tube 11 and the second tube 21 are fitted.

  Then, when the lock pipe 31 is moved to the first pipe 11 side and the lock female screw part 32 is screwed into the lock male screw part 13, the lock pipe 31 comes into contact with the retaining stopper 23 and the second pipe 21 is engaged. Is pushed toward the first tube 11, the contracted and inclined surface 22 is brought into close contact with the expanded and inclined surface 12, and the lock tube 31 is locked to the lock male screw portion 13.

  Thus, by locking the lock tube 31 with respect to the first tube 11, the fitting between the first tube 11 and the second tube 21 is prevented (blocked) from being inadvertently released. .

  Next, the first opposing member 41 is moved to the second opposing member 61 side by the first guiding mechanism (the ridges 15 and 16, the guided groove 42, the guided notch 43), and the second opposing member is moved. While moving the member 61 to the first opposing member 41 side, the corresponding cylindrical protrusion 65A is inserted into each cylindrical hole 44A, and the corresponding rectangular columnar protrusion 65B is inserted into each square hole 44B.

  As described above, when the cylindrical protrusion 65A is inserted into the cylindrical hole 44A and the rectangular column protrusion 65B is inserted into the square hole 44B, the engaging portion 73 has the first guide protrusion 52 and the second guide protrusion. 53 is inserted along the first opposing member 41 between the first and second members.

  When the first opposing member 41 and the second opposing member 61 are pressed until they are in contact with each other, the engaging portion 73 is guided by the inclined protrusion 55 as shown in FIG. The first opposing member 41 and the second opposing member 61 are locked, and the first opposing member 41 and the second opposing member 61 are inadequately coupled. To prevent (block) the release.

  Thus, in a state where the first opposing member 41 and the second opposing member 61 are locked, the second opposing member retaining latch 34 is accommodated in the accommodating recess 62 of the second opposing member 61. The first opposing member 41 and the second opposing member 61 are sandwiched.

  Next, release of the connection of the medical connector C will be described.

  In the state shown in FIG. 1, the first opposing member 41 and the second opposing member are released while elastically deforming (deflecting) the elastic piece 72 and releasing the engagement of the engaging portion 73 with respect to the engaging protrusion 54. The first tube 11 and the second tube 21 can be pulled apart by separating 61 and performing the operation in the reverse order of the above-described operation.

  According to the first embodiment of the present invention, since two locking mechanisms are provided, the fitting of the first tube 11 and the second tube 21 is reliably prevented from being inadvertently released ( Can be blocked).

  Further, the sealing property between the first tube 11 and the second tube 21 is obtained by fitting (engaging) the expansion inclined surface 12 of the first tube 11 and the contracted inclined surface 22 of the second tube 21. Since the engagement between the first tube 11 and the second tube 21 is locked by the engagement between the first engagement portion 51 and the second engagement portion 71, the first engagement Since the pushing amount for engaging the portion 51 and the second engaging portion 71 becomes the pushing amount for sealing the first tube 11 and the second tube 21, the first tube 11 and The pushing amount for sealing the second tube 21 can be secured, and the sealing performance can be secured.

  Further, the sealing property between the first tube 11 and the second tube 21 is obtained by fitting (engaging) the expansion inclined surface 12 of the first tube 11 and the contracted inclined surface 22 of the second tube 21. Since the engagement between the first tube 11 and the second tube 21 is locked by the engagement between the first engagement portion 51 and the second engagement portion 71, it is not involved in the locking mechanism. The 1st pipe | tube 11 and the 2nd pipe | tube 21 can be manufactured with a hard material, for example, hard vinyl chloride, or a polycarbonate.

  Further, the sealing property between the first tube 11 and the second tube 21 is obtained by fitting (engaging) the expansion inclined surface 12 of the first tube 11 and the contracted inclined surface 22 of the second tube 21. Since the engagement between the first tube 11 and the second tube 21 is locked by the engagement between the first engagement portion 51 and the second engagement portion 71, the first tube 11 And the second tube 21 and the locking mechanism (the first opposing member 41, the first engaging portion 51, the second opposing member 61 and the second engaging portion 71) Since it is sufficient if the push-in amount for sealing the two pipes 21 can be secured, a simple configuration can be achieved.

  Further, since the first guide mechanism (the ridges 15 and 16, the guided groove 42, and the guided notch 53) is provided, the first opposing member 41 does not rotate in the circumferential direction of the first tube 11. As a result, the first engaging portion 51 and the second engaging portion 71 are easily engaged.

  In addition, since the first guide portion (the cylindrical hole 44A and the square columnar hole 44B) and the first guided portion (the columnar projection 65A and the square columnar projection 65B) are provided, the first engaging portion 51 and the first 2 can be reliably engaged with each other, and the first opposing member 41 and the second opposing member 61 rotate in the circumferential direction of the first tube 11 and the second tube 21. As a result, the lock (engagement) between the lock male screw portion 13 and the lock tube 31 and the lock (engagement) between the first engagement portion 51 and the second engagement portion 71 are difficult to be released. The certainty is improved.

  In addition, the first guide portion is configured to have a different shape (cylindrical hole 44A, square column hole 44B), and the first guided portion is configured to have a different shape (column projection 65A, square column projection 65B). ), The directionality between the first opposing member 41 and the second opposing member 61, that is, the first for engaging the first engaging portion 51 and the second engaging portion 71. Positioning of the opposing member 41 and the second opposing member 61 is facilitated, and the first engaging portion 51 and the second engaging portion 71 can be reliably engaged.

  Further, since the first engaging portion 51 and the second engaging portion 71 are engaged when the first opposing member 41 and the second opposing member 61 come into contact with each other, the first opposing member 41 is engaged. It is possible to prevent foreign matter from entering between the second opposing member 61 and releasing the engagement between the first engagement portion 51 and the second engagement portion 71.

  Further, the first tube 11 provided with the first facing member 41 and the like and the second tube 21 (ordinary second tube) provided with only the lock tube 31 are engaged, or the first facing Since the first pipe 11 (ordinary first pipe) that does not include the member 41 and the like and the second pipe 21 that includes the lock pipe 31 and the like can be engaged, the range of selection by the user is increased. It becomes wide and easy to use.

  Further, when the engaging portion 73 is elastically deformed and gets over the inclined ridge 55 and the engaging ridge 54 and returns to the original state, an impact and a sound (for example, a sound of patching) are generated. The user can confirm with a sense (tactile sense and hearing) that the lock male screw portion 13 is locked.

  In the first embodiment described above, the second facing member 61 is provided with the second guiding portion that functions in the same manner as the first guiding portions (the cylindrical hole 44A and the rectangular column hole 44B). A similar effect can be obtained by providing a second guided portion that functions in the same manner as the first guided portion (the columnar protrusion 65A and the quadrangular columnar protrusion 65B).

  In addition, the first opposing member 41 is provided with an engaging portion that functions in the same manner as the second engaging portion 71, and the second opposing member 61 has an engaging portion that functions in the same manner as the first engaging portion 51. Similar effects can be obtained with the provided structure.

  The second opposing member 61 is provided (arranged) on the outer periphery of the second tube 21, and the second opposing member 61 abuts against the lock tube 31 and the other end side (left end side) of the second tube 21. The same effect can be obtained even if the configuration is prevented (blocked) from going out.

  15 is a longitudinal sectional view of the medical connector according to the second embodiment of the present invention in an uncoupled state, and FIG. 16 is a longitudinal sectional view of the medical connector according to the second embodiment of the present invention in the coupled and locked state. The same reference numerals are given to the same or corresponding parts as those shown in FIGS. 1 to 14, and the description thereof is omitted.

The medical connector C of the second embodiment is different from the medical connector C of the first embodiment in that the lock male screw portion 13 functions as a first opposing member retaining locking portion, and the lock tube 31 is The second opposing member 61 is provided (arranged) on the outer periphery of the second pipe 21 and is omitted, and the second opposing member 61 abuts against the retaining locking portion 23 and the other end side of the second pipe 21. It is being prevented (blocked) from slipping out (to the left end side).
Other parts are configured in the same manner as the medical connector C of the first embodiment.

  The medical connector C of the second embodiment can be coupled and separated in the same manner as the medical connector C of the first embodiment, and the same effect as the medical connector C of the first embodiment can be obtained. it can.

  In the second embodiment, the second opposing member 61 is provided with a second guiding portion that functions in the same manner as the first guiding portions (the cylindrical hole 44A and the rectangular column hole 44B). The same effect as that of the medical connector C of the first embodiment can also be obtained by providing a second guided portion that functions in the same manner as the one guided portion (the cylindrical protrusion 65A and the quadrangular columnar protrusion 65B). .

  In addition, the first opposing member 41 is provided with an engaging portion that functions in the same manner as the second engaging portion 71, and the second opposing member 61 has an engaging portion that functions in the same manner as the first engaging portion 51. Even if it is provided, the same effect as the medical connector C of the first embodiment can be obtained.

  The second opposing member 61 is provided (arranged) on the outer periphery of the second tube 21, and the second opposing member 61 abuts against the lock tube 31 and the other end side (left end side) of the second tube 21. The same effect as that of the medical connector C of the first embodiment can be obtained even if the configuration is prevented (blocked) from coming out.

  Further, the first guide mechanism (the ridges 15 and 16, the guided groove 42, and the guided notch 53) is omitted, and the second opposing member 61 is connected to the second pipe 21 and the second opposing member 61. Even when the second guide mechanism that functions in the same manner as the first guide mechanism that guides the second tube 21 in the axial direction of the second tube 21 is provided, the same effect as the medical connector C of the first embodiment can be obtained. it can.

  FIG. 17 is a longitudinal sectional view of the medical connector according to the third embodiment of the present invention in the uncoupled state, and FIG. 18 is a longitudinal sectional view of the medical connector according to the third embodiment of the present invention in the coupled and locked state. The same reference numerals are given to the same or corresponding parts as those shown in FIGS. 1 to 16, and the description thereof is omitted.

The medical connector C of the third embodiment is different from the medical connector C of the second embodiment in that the first opposing member 41 is provided integrally with the first tube 11 and the second opposing member is provided. 61 is provided integrally with the tube 21.
Other parts are configured in the same manner as the medical connector C of the second embodiment.

  The medical connector C of the third embodiment can be coupled and separated in the same manner as the medical connector C of the first and second embodiments, and is the same as the medical connector C of the first and second embodiments. Effects can be obtained.

  In the third embodiment, the second facing member 61 is provided with a second guiding portion that functions in the same manner as the first guiding portions (the cylindrical hole 44A and the rectangular column hole 44B). The same effect as that of the medical connector C of the first and second embodiments can be obtained by providing a second guided portion that functions in the same manner as the one guided portion (the cylindrical protrusion 65A and the quadrangular prism protrusion 65B). be able to.

  In addition, the first opposing member 41 is provided with an engaging portion that functions in the same manner as the second engaging portion 71, and the second opposing member 61 has an engaging portion that functions in the same manner as the first engaging portion 51. Even in the configuration to be provided, the same effect as the medical connector C of the first and second embodiments can be obtained.

  FIG. 19 is an explanatory view showing the configuration of the medical connector according to the fourth embodiment of the present invention, in which the same or corresponding parts as those shown in FIGS. To do.

The medical connector C of the fourth embodiment differs from the medical connector C of the first embodiment in that the first and second opposing members 41 and 61 and the first and second engaging portions 51 are different. , 71 are omitted, and a lock projection 33 is provided at a predetermined position of the lock female thread portion 32 of the lock tube 31.
Other parts are configured in the same manner as the medical connector C of the first embodiment.

  In the case of the medical connector C of the fourth embodiment, when the lock tube 31 is moved to the first tube 11 side and the lock female screw portion 32 is screwed to the lock male screw portion 13, the lock tube 31 is prevented from coming off. By pressing the second tube 21 toward the first tube 11 in contact with the portion 23, the contracted inclined surface 22 comes into close contact with the expanded inclined surface 12, and the lock male screw portion 13 rides on the lock protrusion 33. When the resistance increases and the lock male thread portion 13 rides on the lock protrusion 33, the resistance decreases, and the lock pipe 31 is locked to the lock male thread section 13 and the lock pipe 31 is locked to the lock male thread section 13. The user can confirm with an impact (tactile sense).

In the medical connector C of the fourth embodiment, the same effect as that of the medical connector C of the first to third embodiments can be obtained.
Further, when the lock male screw portion 13 rides on the lock protrusion 33, the lock between the lock male screw portion 13 and the lock tube 31 can be prevented from being released.

  FIG. 20 is an explanatory view showing the configuration of the medical connector according to the fifth embodiment of the present invention, in which the same or corresponding parts as those shown in FIGS. To do.

The medical connector C of the fifth embodiment differs from the medical connector C of the first embodiment in that the first and second opposing members 41 and 61 and the first and second engaging portions 51 are different. , 71 are omitted, and a lock protrusion 14 higher than the peak portion 13a (having a larger outer diameter) is provided at a predetermined position on the outer periphery of the first tube 11 on the extension of the lock male screw portion 13, and the lock tube 31 In the inner circumference on the other end side, a circumferential holding groove 33A for accommodating the lock projection 14 is provided.
Other parts are configured in the same manner as the medical connector C of the first embodiment.

  In the case of the medical connector C of the fifth embodiment, when the lock tube 31 is moved to the first tube 11 side and the lock female screw portion 32 is screwed to the lock male screw portion 13, the lock tube 31 is prevented from coming off. By pressing the second tube 21 toward the first tube 11 in contact with the portion 23, the contraction / inclination surface 22 comes into close contact with the expansion / inclination surface 12, and the lock protrusion 14 gets over the edge of the holding groove 33A. When the lock protrusion 14 enters and is held in the holding groove 33A, the resistance decreases, so that the lock pipe 31 is locked to the lock male screw portion 13 and the lock protrusion 14, and the lock pipe 31 is The user can confirm with an impact (tactile sense) that the lock male screw portion 13 and the lock projection 14 are locked.

In the medical connector C of the fifth embodiment, the same effect as that of the medical connector C of the fourth embodiment can be obtained.
Further, the lock projection 14 is held in the holding groove 33A, so that the lock between the lock male screw portion 13 and the lock tube 31 can be prevented from being released.

  The medical connector C of each embodiment described above can be used (used) in combination with the medical connector C of another embodiment.

C medical connector 11 first tube 12 widening inclined surface 13 lock male screw portion (first opposing member retaining portion)
13a mountain part 13b valley part 14 lock protrusion 15 protrusion (first guide mechanism)
16 ridge (first guide mechanism)
21 Second pipe 22 Shrinking and inclined surface 23 Retaining prevention locking part 31 Lock pipe 32 Lock female thread part 33 Lock projection 33A Holding groove 34 Second opposing member retaining part 35 Projection 41 First opposing member 42 Guided groove (first guide mechanism)
43 Guided cutout (first guide mechanism)
44A cylindrical hole (first guide)
44B Square pillar hole (first guide)
51 1st engaging part 52 1st guide protrusion 53 2nd guide protrusion 54 Engagement protrusion 55 Inclined protrusion 61 2nd opposing member 62 Accommodating recessed part 63 Notch 65A Cylindrical protrusion (1st covered object) Guide)
65B Quadrangular prism protrusion (first guided part)
71 Second engagement portion 72 Elastic piece 73 Engagement portion 73a Guided surface T1 First tube T2 Second tube

Claims (4)

A medical connector for connecting a first tube and a second tube,
An inner peripheral surface on one end side is an expanding inclined surface that expands toward the one end, a lock male screw portion is provided on the outer periphery of the one end, and the first tube is connected to the other end. Tube,
A second tube in which the outer peripheral surface on the other end side is a contracted inclined surface that fits into the expanded inclined surface of the first tube, and the second tube is connected to one end;
Provided on the outer circumference of the second pipe so as to be movable in the axial direction of the second pipe and the circumferential direction of the second pipe, and is prevented from slipping out to the other end side of the second pipe. A lock pipe provided with a lock female screw portion screwed into the lock male screw portion on the other end side;
The first pipe is provided on the outer periphery of the first pipe so as to be movable in the axial direction of the first pipe, and is prevented from coming out to one end side of the first pipe by contacting the lock male screw portion. Opposite members of
A first engaging portion provided integrally with the first opposing member;
The second tube is provided on the outer periphery of the second tube or the outer periphery of the lock tube so as to be movable in the axial direction of the second tube and the axial direction of the lock tube, and in contact with the lock tube. A second opposing member that is prevented from slipping out to the other end side of the locking tube, or from slipping out to the other end side of the lock pipe,
A second engagement portion provided integrally with the second facing member and engaged with the first engagement portion;
The engagement between the first engagement portion and the second engagement portion can be released by elastic deformation of the first engagement portion or the second engagement portion.
A medical connector characterized by that. The medical connector according to claim 1, wherein
A first guide mechanism for guiding the first opposing member in the axial direction of the first pipe is provided in the first pipe and the first opposing member.
A medical connector characterized by that. Te medical connector smell of claim 1 or claim 2,
A first guide portion extending in the axial direction into the first facing member on a surface of the first facing member facing the second facing member , or the first facing of the second facing member A second guide portion extending in the axial direction into the second facing member is provided on a surface facing the member ;
A first guided portion that protrudes axially from the second opposing member to a surface of the second opposing member that faces the first opposing member and is guided by the first guiding portion; or second guided portion to be guided is that provided in the second guide portion from the second opposing member to the second opposing member which faces projecting in the axial direction of the first opposing member ,
A medical connector characterized by that. The medical connector according to any one of claims 1 to 3,
Wherein the first engagement portion and the second engagement portion, that match engagement when said the first opposing member and the second opposing member abuts,
Medical connector, characterized in that.

Images