WO2021100542A1

WO2021100542A1 - Connector

Info

Publication number: WO2021100542A1
Application number: PCT/JP2020/041841
Authority: WO
Inventors: 聖一飯田
Original assignee: 株式会社トップ
Priority date: 2019-11-19
Filing date: 2020-11-10
Publication date: 2021-05-27
Also published as: JP7370512B2; TW202131964A; JP2021078741A; TWI846981B

Abstract

The present invention provides a connector that can stably exert a separation prevention function even at the time of re-connection. In the connector 1, the top 31a of a screw thread 31 is formed along a side surface of a reference virtual columnar body having a round cross section centered on a reference central axis C0. The root 32a of a thread groove 32 has at least two inclined regions 34, 35 partitioned in a direction in which the thread groove 32 extends. One inclined region 34 is formed along a side surface of a first virtual inclined columnar body having a round, elliptical or oval cross section centered on a first inclined central axis C1 obliquely intersecting the reference central axis C0. An inclined region 35 adjacent to the one inclined region 34 is formed along a side surface of a second virtual inclined columnar body having a round, elliptical or oval cross section centered on a second inclined central axis C2 obliquely intersecting the reference central axis C0 within a plane different from a plane including the reference central axis C0 and the first inclined central axis C1.

Description

connector

The present invention relates to a connector used for a connection portion of a medical device such as an infusion tube or a three-way stopcock.

Conventionally, as a connector for connecting each part in a medical device constituting an infusion tube such as a three-way activation plug or an infusion tube, a connector having a taper fitting type and a locking mechanism is known (see, for example, Patent Document 1). .. Such a connector is composed of a male side connector having a tubular male lure having a tapered outer peripheral surface and a female side connector having a tubular male lure having a tapered inner peripheral surface. Is inserted into the messuler and fitted to make a connection.

As a locking mechanism, the male connector has a cylindrical lock ring with a female screw on the inner peripheral surface on the outside of the male lure, and the female connector has a male screw that is screwed with the female screw of this lock ring. Is provided on the outer peripheral surface of the female connector. Therefore, by rotating the lock ring after inserting the male lure into the messuler and screwing the female screw of the lock ring into the male screw of the female connector, the male connector and the female connector are fastened to each other and separated from each other. Even when a force is applied in the direction of the screw, it does not easily separate, that is, it is locked.

However, if the female screw of the lock ring and the male screw of the female connector are loosened, the fastening force will be lost and the separation prevention function of the lock mechanism will be lost. Therefore, in the connector described in Patent Document 1, a protruding locking portion having elasticity is provided near the starting end of the thread of the male screw of the female side connector, and the male screw and the female screw are screwed together. When the female screw thread rides on this locking portion, loosening of the screw is prevented.

Japanese Unexamined Patent Publication No. 2005-466

However, in the connector described in Patent Document 1, when the screw thread of the female screw rides on the locking portion, the locking portion is crushed by the screw thread. When making a connection, the loosening prevention function may be impaired due to plastic deformation or wear of the locking portion. For this reason, there is a problem that the female screw of the lock ring and the male screw of the female connector are easily loosened at the time of reconnection, and the separation prevention function by the lock mechanism may not be properly exhibited.

In view of such circumstances, the present invention is intended to provide a connector capable of stably exerting a separation prevention function even when reconnected.

The connector according to the present invention includes a screw composed of a screw thread and a thread groove, and is connected to a mating side connector having a mating side screw to be screwed with the screw, and the top of the screw thread is a predetermined reference center. It is provided along the side surface of a reference virtual pillar having a circular cross section about an axis, and the valley bottom of the thread groove has at least two or more inclined regions partitioned in the continuous direction of the thread groove. The one inclined region is along the side surface of the first inclined virtual pillar having a circular, elliptical or oval cross section about the first inclined central axis that diagonally intersects the reference central axis. The tilted region adjacent to the one tilted region is a second tilted center that diagonally intersects the reference central axis in a plane different from the plane including the reference central axis and the first tilted central axis. It is characterized in that it is provided along the side surface of the second inclined virtual column having a circular, elliptical, or oval-shaped cross section about the axis.

The connector according to the present invention also includes a screw consisting of a screw thread and a thread groove, and in a connector connected to a mating side connector having a mating side screw to be screwed with the screw, the valley bottom of the threaded groove is a predetermined reference. It is provided along the side surface of a reference virtual pillar having a circular cross section about the central axis, and the top of the screw thread has at least two or more inclined regions partitioned in the continuous direction of the screw thread. The one inclined region is along the side surface of the first inclined virtual pillar having a circular, elliptical or oval cross section about the first inclined central axis that diagonally intersects the reference central axis. The inclined region adjacent to the one inclined region is provided so as to have a second inclination that intersects the reference central axis obliquely in a plane different from the plane including the reference central axis and the first inclined central axis. It is characterized in that it is provided along the side surface of the second inclined virtual column having a circular, elliptical or oval cross section about the central axis.

According to the present invention, in a plurality of inclined regions, the valley bottom (or thread top) of the thread groove is inclined with respect to the screw thread top (or thread groove top) of the mating connector and is directed toward the mating side. Can be inflated. As a result, pressing force is applied to the threads (or thread grooves) of the mating connector in different directions at a plurality of locations, and the frictional force increases, so that the screwing can be made difficult to loosen.

In addition, by appropriately setting the shape of the tilted virtual column and the range of the tilted area, the contact area with the thread top (or the valley bottom of the thread groove) of the mating connector can be made an appropriate size, and the tilted area can be set appropriately. Since it is possible to disperse the pressing force in a plurality of directions by providing a plurality of the pressing forces, it is possible to reduce plastic deformation and wear at the contact portion. As a result, the loosening prevention function is appropriately exerted even at the time of reconnection, so that the separation prevention function can be stably exerted.

Further, in the connector of the present invention, when the first inclined central axis is rotated around the reference central axis and placed in a plane including the reference central axis and the second inclined central axis, the reference center It is preferable that the inclination direction is the same as that of the second inclined central axis with respect to the axis.

According to this, due to the inclination with respect to the reference central axis, for example, when one inclined region bulges on one side in the reference central axis direction more than the other side, the inclined region adjacent to this one inclined region also One side in the reference central axis direction can be made to bulge more than the other side. By doing so, the change in the amount of swelling at the boundary between the two inclined regions is reduced, and by preventing local contact and catching during the progress of screwing, plastic deformation and wear at the contact portion are reduced. can do.

Further, in the connector of the present invention, the plane including the reference center axis and the first tilt center axis and the plane including the reference center axis and the second tilt center axis are at an angle of 70 degrees or more and 110 degrees or less. It is preferable to intersect.

According to this, when viewed from the reference central axis direction, the direction of the pressing force due to one inclined region and the direction of the pressing force due to the adjacent inclined region can be intersected at an angle of 70 degrees or more and 110 degrees or less. it can. Therefore, it is possible to increase the lateral elastic deformation (lateral strain) due to the pressing force in one inclined region to increase the pressing force in the inclined region adjacent to the elastic deformation (lateral strain), so that the loosening prevention function in the plurality of inclined regions can be obtained. Can be exerted synergistically.

Further, in the connector of the present invention, it is preferable that the first inclined virtual column and the second inclined virtual column have the same cross section.

According to this, it is possible to appropriately balance the pressing force due to one inclined region and the inclined region adjacent thereto and the deformation associated therewith, and to enhance the loosening prevention function.

Further, in the connector of the present invention, it is preferable that the first inclined central axis and the second inclined central axis intersect with the reference central axis at the same angle.

According to the connector according to the present invention, it is possible to exert an excellent effect that the separation prevention function can be stably exhibited even when reconnecting.

A is a plan view of the connector according to the embodiment of the present invention, B is a front view of the connector, and C is a right side view of the connector 1. A is a sectional view taken along line I-I in FIG. 1A, and B is a sectional view taken along line III-III in FIG. 2A. A is a sectional view taken along line II-II in FIG. 1A, and B is a sectional view taken along line IV-IV in FIG. 3A. A and B are diagrams showing a state in which the mating connector is connected to the connector.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 1A is a plan view of the connector 1 according to the embodiment of the present invention, FIG. 1B is a front view of the connector 1, and FIG. 1C is a right side view of the connector 1. 2A is a sectional view taken along line I-I in FIG. 1A, and FIG. 2B is a sectional view taken along line III-III in FIG. 2A. 3A is a sectional view taken along line II-II in FIG. 1A, and FIG. 3B is a sectional view taken along line IV-IV in FIG. 3A.

In the following description, the horizontal direction in the plan view is the x-axis direction, the vertical direction in the plan view is the y-axis direction, and the vertical direction in the front view is the z-axis direction. Further, the plane perpendicular to the z-axis is defined as the xy plane, the plane perpendicular to the y-axis is defined as the z-x plane, and the plane perpendicular to the x-axis is defined as the yz plane.

The connector 1 of the present embodiment is used as a connector to which an infusion tube for mixed injection, a syringe, or the like is connected in a three-way stopcock, a T port (mixed injection port), or the like. The connector 1 is made of an appropriate resin and consists of a cup-shaped base 10, a cylindrical main body 20 projecting upward from the base 10, and a male screw 30 provided on the outer peripheral surface of the main body 20. It is configured.

The base 10 is a portion fixed to a three-way stopcock or the like, and includes a disk-shaped upper wall 11 and a side wall 12 in which the outer peripheral portion of the upper wall 11 is projected downward. A communication hole 13 that communicates with the inside of the main body 20 is provided at the center of the upper wall 11. Further, the end surface 12a of the side wall 12 is provided with a groove 14 continuous in the circumferential direction. The connector 1 is configured to be fixed to the main body of a three-way stopcock or the like by inserting a protrusion provided in the main body of the three-way stopcock or the like into the groove 14 and melting the protrusion by ultrasonic welding or the like. ..

The main body 20 is a portion into which the male luer 110 (see FIGS. 4A and 4B) of the mating connector 100 provided at the end of, for example, an infusion tube is inserted and fitted, and is a reference central axis C0 parallel to the z-axis. It is configured in a cylindrical shape centered on. The main body 20 includes a mess lure tapered portion 21 provided inside the tip end side (opposite side of the base 10) and an accommodating portion 22 provided inside the base end side (base 10 side).

The mess luer taper portion 21 is formed in a tapered shape according to a predetermined standard, and is configured to fit tightly with the male luer taper portion 111 (see FIGS. 4A and 4B) of the mating connector 100. The accommodating portion 22 has an inner diameter larger than that of the female lure tapered portion 21, and is formed so as to be continuous with the communication hole 13 of the base 10. The accommodating portion 22 constitutes a space for accommodating an appropriate valve body together with the inside of the base 10.

The male screw 30 is a portion that exerts a function of preventing separation between the connectors by being screwed and fastened with the female screw 130 (see FIGS. 4A and 4B) of the lock ring 120 included in the mating connector 100. In other words, the male screw 30 constitutes a locking mechanism together with the female screw 130 of the mating connector 100. The male screw 30 of the present embodiment is a two-row trapezoidal screw, and includes two threads 31 and two thread grooves 32.

The screw thread 31 is a side surface (outer peripheral surface) of the first reference virtual pillar 40a (see FIG. 2A or 3A) centered on the reference central axis C0, which is the central axis of the main body 20, like the screw thread of a general screw. ), And is provided so as to be continuous in a spiral shape centered on the reference central axis C0. The top 31a of the screw thread 31 is provided along the side surface (outer peripheral surface) of the second reference virtual column 40b (see FIG. 2A or 3A) centered on the reference center axis C0.

As shown below in FIGS. 2A and 3A, the first reference virtual pillar 40a and the second reference virtual pillar 40b have a cross section (a cross section orthogonal to the reference center axis C0) having a diameter a1. It is a circle and a circle with a diameter of a2. Therefore, the apex 31a keeps a substantially constant distance from the reference central axis C0 and is a plane substantially parallel to the reference central axis C0.

The screw groove 32 is formed between two threads 31. In the present embodiment, the screw groove 32 is divided into three regions in the continuous direction of the screw groove 32. Specifically, in the present embodiment, the reference region 33 provided along the side surface (outer peripheral surface) of the first reference virtual pillar 40a and the side surface (outer peripheral surface) of the first inclined virtual pillar 41 (see FIG. 2A). ), And the second inclined region 35 provided along the side surface (outer peripheral surface) of the second inclined virtual pillar 42 (see FIG. 2B), and the valley bottom 32a. It is provided in.

The reference area 33 is an area provided along the side surface of the first reference virtual pillar 40a. Therefore, the reference region 33 is a region formed in the same manner as the valley bottom of the screw groove in a general screw, maintains a substantially constant distance from the reference central axis C0, and is a surface substantially parallel to the reference central axis C0. It has become.

In the present embodiment, the reference region 33 is provided on the tip end side of the main body 20, that is, at the start end of screwing. In the present embodiment, the screw thread 31 and the screw groove 32 are provided around the reference central axis C0 over a range of about 270 degrees (about 3/4 circumference), of which the reference region 33 is around the reference central axis C0. It is provided over a range of about 20 degrees. By providing the reference region 33 on the tip side in this way, it is possible to smoothly start the screwing.

The first inclined region 34 is an area provided along the side surface of the first inclined virtual pillar 41 having a different posture and shape from the first reference virtual pillar 40a and the second reference virtual pillar 40b. As shown in FIGS. 2A and 2B, the first inclined virtual pillar 41 is centered on the first inclined central axis C1 that diagonally intersects the reference central axis C0 in the first plane P1 parallel to the yz plane. It is a pillar body to do.

The first inclined central axis C1 intersects the reference central axis C0 at an angle θ. Further, as shown on the upper side of FIG. 2A, the first inclined virtual pillar 41 has a cross section (a cross section orthogonal to the first inclined central axis C1) whose long axis is located in the first plane P1. , The minor axis a1 (same as the diameter of the first reference virtual pillar 40a), and the major axis b is an ellipse.

Therefore, the first inclined region 34 is inclined in the y-axis direction at an angle θ with respect to the reference central axis C0, and is outside the reference region 33 along the side surface of the first reference virtual pillar 40a (of the reference central axis C0). It is a region that bulges in the (centrifugal direction) direction.

In the present embodiment, the first inclined region 34 is provided at a position adjacent to the reference region 33 over a range of about 125 degrees around the reference central axis C0. Further, since the male screw 30 of the present embodiment is a double-threaded screw, the first inclined regions 34 provided at the valley bottom 32a of the two screw grooves 32 are located on both sides of the main body 20 in the x-axis direction, respectively. ing.

Even when the cross section of the first inclined virtual pillar 41 is a circle having the same diameter a1 as the first reference virtual pillar 40a, the first inclined virtual pillar 41 can be tilted with respect to the reference central axis C0. The first inclined region 34 can be bulged more than the reference region 33, but in the present embodiment, the bulging amount is increased by forming the cross section of the first inclined virtual pillar 41 into an elliptical shape as described above. I am trying to increase it.

The second inclined region 35 is located on the side surface of the second inclined virtual pillar 42 having a different posture and shape from the first reference virtual pillar 40a and the second reference virtual pillar 40b, similarly to the first inclined virtual pillar 41. It is an area provided along the line. As shown in FIGS. 3A and 3B, the second inclined virtual pillar 42 is centered on the second inclined central axis C2 that diagonally intersects the reference central axis C0 in the second plane P2 parallel to the zx plane. It is a pillar body to do.

The second inclined central axis C2 intersects the reference central axis C0 at the same angle θ as the first inclined central axis C1. Further, as shown on the upper side of FIG. 3A, the second inclined virtual pillar 42 has a cross section (a cross section orthogonal to the second inclined central axis C2) whose long axis is located in the second plane P2. , The minor axis a1 (same as the diameter of the first reference virtual pillar 40a), and the major axis b is an ellipse. That is, the second inclined virtual pillar 42 has the same shape as the first inclined virtual pillar 41, although the posture is different from that of the first inclined virtual pillar 41.

Therefore, the second inclined region 35 is inclined at an angle θ with respect to the reference central axis C0 in the x-axis direction 90 degrees different from the first inclined region 34, and the reference along the side surface of the first reference virtual pillar 40a. It is a region that bulges outward from the region 33 (centrifugal direction of the reference central axis C0). In the present embodiment, the second inclined region 35 is provided at a position opposite to the reference region 33 and adjacent to the first inclined region 34 over a range of about 125 degrees around the reference central axis C0.

In the present embodiment, since the male screw 30 is a double-threaded screw, the second inclined regions 35 provided at the valley bottom 32a of the two screw grooves 32 are located on both sides of the main body 20 in the y-axis direction, respectively. Further, similarly to the first inclined virtual pillar 41, the cross section of the second inclined virtual pillar 42 has an elliptical shape as described above, so that the amount of swelling of the second inclined region 35 is increased. There is.

Further, in the present embodiment, the inclination of the first inclination central axis C1 is upward to the left in the right side view, and the inclination of the second inclination central axis C2 is upward to the left in the front view. Therefore, when the first inclined central axis C1 is rotated around the reference central axis C0 and placed in the second plane P2, the first inclined central axis C1 is the second inclined central axis C2 with respect to the reference central axis C0. The direction of inclination is the same as that of, and it rises to the left when viewed from the front. That is, the first inclined central axis C1 and the second inclined central axis C2 are in the same inclined direction with respect to the reference central axis C0 when they are rotated around the reference central axis C0 and placed in the same plane. It is inclined to.

By doing so, in one of the two screw grooves 32, the second inclined region 35 whose tip side bulges from the proximal end side is adjacent to the first inclined region 34 whose tip end side bulges from the proximal end side. On the other hand, it is possible to make the second inclined region 35 whose proximal end side bulges from the distal end side be adjacent to the first inclined region 34 whose proximal end side bulges from the distal end side. As a result, it is possible to reduce the change in the amount of swelling at the boundary between the first inclined region 34 and the second inclined region 35, and to prevent an extreme step or the like from occurring.

In the present embodiment, since the second inclined region 35 is provided on the base end side of the main body 20 with respect to the first inclined region 34, the second inclined central axis C2 is the main body 20 rather than the first inclined central axis C1. It is located on the base end side of. Therefore, the intersection of the reference central axis C0 and the second inclined central axis C2 is located closer to the base end side of the main body 20 than the intersection of the reference central axis C0 and the first inclined central axis C1.

4A and 4B are views showing a state in which the mating connector 100 is connected to the connector 1. 4A is a sectional view taken along line II in FIG. 1A, and FIG. 4B is a sectional view taken along line II-II in FIG. 1A. Further, in FIGS. 4A and 4B, the mating connector 100 is shown by a chain double-dashed line, and a state in which the connector 100 is not deformed is virtually shown.

The mating connector 100 is composed of an appropriate resin, and as shown in FIGS. 4A and 4B, has a stepped cylindrical male lure 110 and a bottomed cylindrical lock ring 120 loosely fitted on the outer circumference of the male lure 110. , Is equipped.

An male luer taper portion 111 that fits with the female lure taper portion 21 is provided at the tip end portion of the male lure 110, and an infusion tube or the like (not shown) is connected to the base end portion. Further, a flange portion 112 that abuts on the lock ring 120 in the axial direction is provided on the base end side of the male luer tapered portion 111.

The lock ring 120 is provided with a female screw 130 screwed with a male screw 30 on the inner peripheral surface. The female screw 130 is composed of a thread 131 corresponding to the thread 32 of the male screw 30 and a thread 132 corresponding to the thread 31 of the male screw 30. A through hole 122 through which the male lure 110 is inserted is provided in the central portion of the bottom portion 121 of the lock ring 120 so that the edge portion of the through hole 122 abuts on the flange portion 112 from the base end side of the male lure 110. It has become. The lock ring 120 may be integrally formed with the male lure 110.

When connecting the mating connector 100 to the connector 1, first, the male luer taper portion 111 is inserted into the female luer taper portion 21 along the reference central axis C0 to be fitted, and then the lock ring 120 is rotated to make a male screw. 30 and the female screw 130 are screwed together. At this time, as the male screw 30 and the female screw 130 are screwed together, the bottom portion 121 of the lock ring 120 presses the flange portion 112 of the male lure 110 toward the connector 1, so that the male lure taper portion 111 and the female screwer The fitting of the tapered portion 21 is strengthened, and a fastening force is generated between the connector 1 and the mating connector 100. As a result, a separation prevention function that prevents the connector 1 and the mating connector 100 from being separated is exhibited.

Further, when the male screw 30 and the female screw 130 are screwed together, as shown in FIG. 4A, the top 131a of the thread 131 of the female screw 130 is pressed in contact with the first inclined region 34 on the tip side of the main body 20. As a result, the lock ring 120 is subjected to a force that pushes it open mainly in the y-axis direction and a moment that causes it to rotate around an axis parallel to the x-axis.

Similarly, as shown in FIG. 4B, the lock ring 120 is pressed by the top 131a of the thread 131 of the female screw 130 in contact with the second inclined region 35 on the base end side of the main body 20. A force that pushes open mainly in the x-axis direction acts, and a moment that rotates around an axis parallel to the y-axis acts.

As a result, the lock ring 120 and the main body 20 are elastically deformed as appropriate, and the restoring force of the elastic deformation applies a larger pressing force to the contact portion between the male screw 30 and the female screw 130 than a general screw. As a result, the frictional force between the male screw 30 and the female screw 130 increases, and the screw becomes difficult to loosen. That is, a loosening prevention function for preventing the male screw 30 and the female screw 130 from loosening is exhibited.

The first inclined region 34 and the second inclined region 35 are provided along the side surfaces of the first inclined virtual pillar 41 and the second inclined virtual pillar 42 having an elliptical cross section, respectively, and the reference central axis C0, respectively. Since the female screw 130 is provided around a relatively wide area of about 125 degrees, the contact area of the female screw 130 with the top 131a of the thread 131 is an appropriate size.

That is, in the first inclined region 34 and the second inclined region 35, unlike the case where the protrusion is provided as in the conventional case, local contact with the female screw 130 of the mating connector 100 does not occur, so that the first It is possible to reduce plastic deformation and wear in the inclined region 34, the second inclined region 35, or the apex 131a of the screw thread 131. Further, in the present embodiment, in the first inclined region 34 and the second inclined region 35 of one screw groove 32, which of the distal end side and the proximal end side is more bulging is aligned, so that the first inclined region 34 and the first inclined region 34 and the base end side are aligned. Local contact, catching, etc. do not occur even at the boundary of the second inclined region 35.

Further, since the pressing force can be dispersed in a plurality of directions by bulging the first inclined region 34 and the second inclined region 35, it is possible to further reduce plastic deformation and wear at the contact portion. Become. In particular, in the present embodiment, since the directions of the pressing force by the first inclined region 34 and the second inclined region 35 adjacent to each other are orthogonal to each other, the lock ring 120 is elastically deformed in the lateral direction due to one of the pressing forces. For example, when elastically deformed so as to be expanded in the y-axis direction, elastically deformed so as to be compressed in the x-axis direction) acts in the direction of increasing the pressing force of the other, and the first inclined region 34 and the second. It is possible to synergistically exert the loosening prevention function of the inclined region 35.

Further, in the present embodiment, the shapes of the cross sections of the first inclined virtual column 41 and the second inclined virtual column 42 are made the same, and the reference central axis C0 of the first inclined central axis C1 and the second inclined central axis C2 is made the same. By making the inclination angle to the same with respect to the above, the pressing force by the first inclination region 34 and the second inclination region 35 is appropriately balanced, and the loosening prevention function is enhanced.

As described above, according to the connector 1, it is possible to reduce plastic deformation and wear at the contact portion while appropriately exerting the loosening prevention function. Therefore, the connector 1 is once disconnected from the mating connector 100 and then reconnected. Even in this case, it is possible to appropriately exert the loosening prevention function.

In the present embodiment, the minor diameter of the cross section of the first inclined virtual pillar 41 and the second inclined virtual pillar 42 has the same dimension (a1) as the diameter of the first reference virtual pillar 40a. It may have different dimensions. Further, the shape of the cross section of the first inclined virtual pillar 41 and the second inclined virtual pillar 42 is not limited to the elliptical shape, and may be circular as described above, for example, an oval. It may have an oval shape that is similar to an elliptical shape such as a shape or an egg shape. Further, the first inclined virtual pillar 41 and the second inclined virtual pillar 42 may have cross sections having different dimensions or shapes from each other.

Further, the range around the reference central axis C0 of the first inclined area 34 and the second inclined area 35 is not limited to about 125 degrees, and may be another range. Similarly, the range around the reference central axis C0 of the reference region 33 may be a range other than about 20 degrees, and the reference region 33 may not be provided. Further, the thread 31 and the thread groove 32 of the male screw 30 may be provided around the reference central axis over a range other than about 270 degrees.

Further, the first inclined region 34 and the second inclined region 35 are not limited to those adjacent to each other in one screw groove 32, and a reference region 33 is provided between the first inclined region 34 and the second inclined region 35. You may do so. That is, the first inclined region 34 and the second inclined region 35 may be adjacent to each other in one screw groove 32 via the reference region 33.

Further, the first inclined region 34 of one screw groove 32 and the first inclined region 34 of the other screw groove 32 are separated from each other (position, posture or cross-sectional shape is different) of the first inclined virtual pillar 41. It may be provided along the side surface. Similarly, the second inclined region 35 of one screw groove 32 and the second inclined region 35 of the other screw groove 32 may be provided along the side surfaces of different second inclined virtual pillars 42. ..

Further, the first plane P1 including the first inclined central axis C1 and the reference central axis C2, and the second plane P2 including the second inclined central axis C2 and the reference central axis C0 are not limited to those orthogonal to each other. They may intersect each other at an angle of. However, as described above, in order to effectively utilize the lateral elastic deformation of the lock ring 120 due to one pressing force, the first plane P1 and the second plane P2 are at an angle of 70 degrees or more and 110 degrees or less. It is preferable that they intersect each other, more preferably they intersect each other at an angle of 80 degrees or more and 100 degrees or less, and most preferably they intersect each other at an angle of 85 degrees or more and 95 degrees or less.

Further, the angle θ at which the reference central axis C0, the first inclined central axis C1 and the second inclined central axis C2 intersect is not particularly limited, but the bulging of the first inclined region 34 and the second inclined region 35 is not particularly limited. It is preferable that the amount does not exceed the top 31a of the screw thread 31. Further, the first inclined central axis C1 and the second inclined central axis C2 may intersect the reference central axis C0 at different angles.

Further, the first inclined central axis C1 and the second inclined central axis C2 are in the same inclined direction with respect to the reference central axis C0 when they are rotated around the reference central axis C0 and placed in the same plane. Is preferable, but the present invention is not limited to this. That is, the first inclination depends on various settings such as the shape and posture of the cross section of the first inclined virtual pillar 41 and the second inclined virtual pillar 42, and the range of the first inclined region 34 and the second inclined region 35. The central axis C1 and the second inclined central axis C2 may have opposite inclination directions with respect to the reference central axis C0 when they are rotated around the reference central axis C0 and placed in the same plane.

Further, in the present embodiment, the central axis of the main body 20 is set as the reference central axis C0, but the reference central axis C0 may intersect the central axis of the main body diagonally, and in this case, the first inclination The central axis C1 or the second inclined central axis C2 may coincide with the central axis of the main body 20.

Further, in the present embodiment, the case where two inclined regions of the first inclined region 34 and the second inclined region 35 are provided is shown, but the range around the reference central axis C0 of the screw thread 31 and the screw groove 32 and the main body 20 Depending on the axial dimension and the like, one screw groove 32 may be provided with three or more inclined regions.

Further, the male screw 30 is not limited to the double-threaded screw, and may be a single-threaded screw or a multi-threaded screw having three or more threads. Further, the male screw 30 is not limited to the trapezoidal screw, and may be a screw having other shapes such as a triangular screw, a square screw, a saw blade screw and a round screw.

Further, instead of the valley bottom 32a of the screw groove 32, the first inclined region 34 and the second inclined region 35 may be provided at the top 31a of the screw thread 31. In this case, for example, the valley bottom 32a of the screw groove 32 is provided along the side surface of the first reference virtual column 40a, and the minor axis of the cross section of the first inclined virtual column 41 and the second inclined virtual column 42 is a2. By making the major axis larger than this, a first inclined region 34 and a second inclined region 35 that bulge outward from the side surface of the second reference virtual pillar 40b can be provided at the top 31a of the screw thread 31. Further, in this case, a reference region 33 provided along the side surface of the second reference virtual pillar 40b may be provided on the tip end side of the top 31a of the screw thread 31.

Even when the first inclined region 34 and the second inclined region 35 are provided on the top 31a of the screw thread 31, the first inclined region 34 and the second inclined region 35 are the thread grooves 132 in the female screw 130 of the mating connector 100. Since the valley bottom 132a of the screw groove 32 is pressed, the same effect as when provided at the valley bottom 32a of the screw groove 32 can be obtained. Needless to say, even in this case, each of the above-described modifications can be applied. Further, the first inclined region 34 and the second inclined region 35 may be provided at both the valley bottom 32a of the thread groove 32 and the top 31a of the thread 31.

Further, although not shown, the connector 1 may be provided with a female screw instead of the male screw 30 and may be connected to a mating connector having the male screw. That is, the connector 1 may have the same structure as the mating connector 100 in the above example.

In this case, for example, a first inclined region 34 is provided along the side surface of the first inclined virtual pillar 41 having an elliptical cross section in which the short axis is located in the first plane P1, and the short axis is the second plane P2. By providing the second inclined region 35 along the side surface of the second inclined virtual pillar 42 having the elliptical cross section located inside, the valley bottom of the screw groove of the female screw or the top of the screw thread is opposed to the other side. It can be inflated toward the male screw. Therefore, even in the connector 1 provided with the female screw instead of the male screw 30, the same effect as in the case of providing the male screw 30 described above can be obtained. Further, even in this case, each of the above-described modifications can be applied.

Further, the connector 1 may be provided with an male luer tapered portion instead of the mess luer tapered portion 21, or may be provided with both the mess luer tapered portion 21 and the male luer tapered portion. Neither the mess lure taper portion 21 nor the male lure taper portion may be provided.

Further, the connector 1 is not limited to the one provided in the three-way stopcock, the T port, or the like, and may be provided in, for example, another medical device, an infusion tube, or the like. Needless to say, any shape can be adopted as the shape of the base 10 and the internal shape of the main body 20.

Although the embodiments of the present invention have been described above, the connector of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention. Is.

Further, the actions and effects shown in the above-described embodiments are merely a list of the most preferable actions and effects arising from the present invention, and the actions and effects according to the present invention are not limited thereto.

1 Connector 30 Male screw 31 Thread 31a Thread top 32 Thread groove 32a Thread groove valley bottom 34 1st tilt area 35 2nd tilt area 40b 2nd reference virtual pillar 41 1st tilt virtual pillar 42 2nd tilt virtual Pillar 100 Mating connector 130 Female thread C0 Reference center axis C1 First tilt center axis C2 Second tilt center axis P1 First plane P2 Second plane

Claims

In a connector having a screw consisting of a screw thread and a thread groove and connected to a mating connector having a mating screw to be screwed with the screw.
The top of the screw thread is provided along the side surface of the reference virtual column having a circular cross section about a predetermined reference central axis.
The valley bottom of the thread groove has at least two or more inclined regions partitioned in the continuous direction of the thread groove.
One of the inclined regions is provided along the side surface of the first inclined virtual column having a circular, elliptical or oval cross section about the first inclined central axis that diagonally intersects the reference central axis. Be,
The inclined region adjacent to the one inclined region is centered on a second inclined central axis that diagonally intersects the reference central axis in a plane different from the plane including the reference central axis and the first inclined central axis. A connector characterized in that it is provided along the side surface of a second inclined virtual column having a circular, elliptical or oval cross section.
In a connector having a screw consisting of a screw thread and a thread groove and being connected to a mating connector having a mating screw to be screwed with the screw.
The valley bottom of the thread groove is provided along the side surface of the reference virtual column having a circular cross section about a predetermined reference central axis.
The thread apex has at least two or more tilted regions partitioned in the contiguous direction of the thread.
One of the inclined regions is provided along the side surface of the first inclined virtual pillar having a circular, elliptical or oval cross section about the first inclined central axis that diagonally intersects the reference central axis. Be,
The inclined region adjacent to the one inclined region is centered on a second inclined central axis that diagonally intersects the reference central axis in a plane different from the plane including the reference central axis and the first inclined central axis. A connector characterized in that it is provided along the side surface of a second inclined virtual column having a circular, elliptical or oval cross section.
In the connector according to claim 1 or 2.
When the first tilted central axis is rotated around the reference central axis and placed in a plane including the reference central axis and the second tilted central axis, the second tilted central axis is tilted with respect to the reference central axis. A connector characterized by having the same inclination direction as the central axis.
In the connector according to any one of claims 1 to 3.
A connector characterized in that the plane including the reference central axis and the first inclined central axis and the plane including the reference central axis and the second inclined central axis intersect each other at an angle of 70 degrees or more and 110 degrees or less. ..
In the connector according to any one of claims 1 to 4.
The first inclined virtual pillar body and the second inclined virtual pillar body are connectors having the same cross-sectional shape.
In the connector according to any one of claims 1 to 5.
A connector characterized in that the first inclined central axis and the second inclined central axis intersect the reference central axis at the same angle.