JP7370512B2 - connector - Google Patents

Description

The present invention relates to a connector used for connecting parts of medical instruments such as infusion tubes and three-way stopcocks.

Conventionally, connectors with a taper fitting type and a locking mechanism have been known as connectors for connecting various parts of medical instruments constituting infusion tubes such as three-way stopcocks and infusion tubes (see, for example, Patent Document 1). . Such a connector consists of a male side connector equipped with a cylindrical male luer with a tapered outer peripheral surface, and a female side connector equipped with a cylindrical female luer with a tapered inner peripheral surface. The connection is made by inserting and fitting into the female luer.

In addition, as a locking mechanism, the male connector has a cylindrical lock ring with a female thread on the inner circumferential surface on the outside of the male luer, and the female connector has a male thread that engages with the female thread of the lock ring. is provided on the outer peripheral surface of the female lure. Therefore, by rotating the lock ring after inserting the male luer into the female luer and screwing the female thread of the lock ring into the male thread of the female connector, the male connector and female connector are fastened to each other and separated. Even if a force is applied in the direction of

However, if the threading between the female thread of the lock ring and the male thread of the female connector becomes loose, the fastening force will be lost and the separation prevention function of the lock mechanism will be lost. For this reason, in the connector described in Patent Document 1, an elastic protruding locking portion is provided near the starting end of the thread of the male screw of the female connector, and the male screw and the female screw are screwed together. At this time, the thread of the female thread rides on this locking portion, thereby preventing the thread from loosening.

Japanese Patent Application Publication No. 2005-466

However, in the connector described in Patent Document 1, when the thread of the female screw rides on the locking part, the locking part is crushed by this thread, so the connection can be restarted after being disconnected once. When making a connection, the loosening prevention function may be impaired due to plastic deformation or wear of the locking part. Therefore, when reconnecting, the threading between the female thread of the lock ring and the male thread of the female connector tends to loosen, causing a problem in that the locking mechanism may not perform its separation prevention function appropriately.

In view of these circumstances, the present invention aims to provide a connector that can stably exhibit a separation prevention function even when reconnected.

A connector according to the present invention includes a screw having a thread and a thread groove, and is connected to a mating connector that has a mating screw that is screwed into the screw, and the top of the thread is located at a predetermined reference center. The screw groove is provided along a side surface of a reference virtual columnar body having a circular cross section centered on the axis, and the root of the thread groove has at least two or more inclined regions partitioned in a continuous direction of the screw groove. and one of the inclined regions is arranged along a side surface of a first inclined virtual column having a circular, elliptical or oval cross section centered on a first inclined central axis diagonally intersecting the reference central axis. The inclined area adjacent to the one inclined area has a second inclined center that obliquely intersects the reference central axis in a plane different from a 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 centered on the axis.

The connector according to the present invention also includes a screw having a thread and a thread groove, and is connected to a mating connector that has a mating screw that screws with the screw, wherein the bottom of the thread groove is set according to a predetermined standard. It is provided along the side surface of a reference virtual column having a circular cross section centered on the central axis, and the top of the thread has at least two or more inclined regions partitioned in a continuous direction of the thread. and one of the inclined regions extends along a side surface of a first inclined virtual column having a circular, elliptical or oval cross section centered on a first inclined central axis that diagonally intersects with the reference central axis. The inclined area adjacent to the one inclined area has a second inclined area that obliquely intersects the reference central axis in a plane that is different from a plane that includes 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, the bottoms of the thread grooves (or the tops of the threads) in the plurality of inclined regions are inclined with respect to the tops of the threads (or the bottoms of the threads) of the mating connector, and are directed toward the other party. 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, increasing frictional force, making it difficult for the screw connection to loosen.

In addition, by appropriately setting the shape of the inclined virtual column and the range of the inclined area, the contact area with the top of the thread (or the bottom of the thread groove) of the mating connector can be made to an appropriate size, and the inclined area Since it is possible to disperse the pressing force in multiple directions by providing a plurality of , it is possible to reduce plastic deformation and wear at the contact portion. Thereby, the loosening prevention function is properly exhibited even when reconnecting, so that the separation prevention function can be stably exhibited.

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

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

Furthermore, in the connector of the present invention, a plane including the reference center axis and the first tilted center axis and a plane including the reference center axis and the second tilted center axis are at an angle of 70 degrees or more and 110 degrees or less with respect to each other. Preferably, they intersect.

According to this, when viewed from the reference center axis direction, the direction of the pressing force due to one inclined area and the direction of the pressing force due to the adjacent inclined area cannot intersect at an angle of 70 degrees or more and 110 degrees or less. can. Therefore, the elastic deformation (lateral strain) in the lateral direction due to the pressing force of one sloped area can increase the pressing force of the adjacent sloped area, so it is possible to prevent loosening by using multiple sloped areas. can be demonstrated synergistically.

Moreover, 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 shape in cross section.

According to this, it is possible to appropriately balance the pressing force caused by one slope area and the adjacent slope area and the resulting deformation, thereby enhancing the loosening prevention function.

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

According to this, it is possible to appropriately balance the pressing force caused by one slope area and the adjacent slope area and the resulting deformation, thereby enhancing the loosening prevention function.

According to the connector according to the present invention, an excellent effect can be achieved in that the separation prevention function can be stably exhibited even during reconnection.

A is a plan view of a connector according to an embodiment of the present invention, B is a front view of the connector, and C is a right side view of the connector 1. FIG. A is a sectional view taken along the line II in FIG. 1A, and B is a sectional view taken along the 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 a mating connector is connected to the connector.

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1A is a plan view of a connector 1 according to an 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. Further, FIG. 2A is a cross-sectional view taken along the line II in FIG. 1A, and FIG. 2B is a cross-sectional view taken along the line III-III in FIG. 2A. Further, FIG. 3A is a sectional view taken along the line II-II in FIG. 1A, and FIG. 3B is a sectional view taken along the line IV-IV in FIG. 3A.

In the following description, the left-right direction in the plan view is referred to as the x-axis direction, the up-down direction in the plan view is referred to as the y-axis direction, and the up-down direction in the front view is referred to as the z-axis direction. Further, a plane perpendicular to the z-axis is defined as an xy plane, a plane perpendicular to the y-axis is defined as a z-x plane, and a plane perpendicular to the x-axis is defined as a yz plane.

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

The base 10 is a part 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 projects downward. A communication hole 13 communicating with the inside of the main body 20 is provided in the center of the upper wall 11 . Further, the end surface 12a of the side wall 12 is provided with a groove 14 that continues in the circumferential direction. The connector 1 is configured to be fixed to the main body of the three-way stopcock by inserting a protrusion provided on the main body of the three-way stopcock into the groove 14 and melting the protrusion using ultrasonic welding or the like. .

The main body 20 is a part into which a male luer 110 (see FIGS. 4A and B) of a mating connector 100 provided at the end of an infusion tube or the like is inserted and fitted, and has a reference central axis C0 parallel to the z-axis. It has a cylindrical shape with the center at the center. The main body 20 includes a female luer taper section 21 provided inside the distal end side (opposite side of the base 10), and a housing section 22 provided inside the proximal end side (side of the base 10).

The female luer taper portion 21 is formed into a tapered shape according to a predetermined standard, and is configured to fit in the male luer taper portion 111 (see FIGS. 4A and 4B) of the mating connector 100 in a fluid-tight manner. The housing portion 22 has an inner diameter larger than that of the female luer taper portion 21 and is formed 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 part that exhibits a separation prevention function between the connectors by being screwed into and fastened with the female screw 130 (see FIGS. 4A and 4B) of the lock ring 120 provided 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 thread 30 of this embodiment is a two-thread trapezoidal thread, and includes two threads 31 and two thread grooves 32.

The thread 31, like the thread on a general screw, is located on the side surface (outer peripheral surface) of the first reference virtual column 40a (see FIG. 2A or 3A) centered on the reference central axis C0, which is the central axis of the main body 20. ), and is provided so as to protrude in the centrifugal direction from ) and continue in a spiral shape centered on the reference central axis C0. Further, 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 central axis C0.

As shown in the lower side of FIGS. 2A and 3A, the first reference virtual column 40a and the second reference virtual column 40b each have a shape of a cross section (a cross section perpendicular to the reference central axis C0) with a diameter a1. It is circular and has a diameter a2. Therefore, the apex 31a maintains a substantially constant distance from the reference central axis C0 and is a surface substantially parallel to the reference central axis C0.

The thread groove 32 is formed between the two threads 31. In this embodiment, the thread groove 32 is divided into three regions in the direction in which the thread groove 32 continues. Specifically, in this embodiment, the reference area 33 provided along the side surface (outer circumferential surface) of the first reference virtual column 40a and the side surface (outer circumferential surface) of the first inclined virtual column 41 (see FIG. 2A) ) and the second inclined region 35 provided along the side surface (outer circumferential surface) of the second inclined virtual column 42 (see FIG. 2B). It is set up in

The reference area 33 is an area provided along the side surface of the first reference virtual column 40a. Therefore, the reference region 33 is a region formed similarly to the bottom of a thread groove in a general screw, and maintains a substantially constant distance from the reference center axis C0, and is a plane substantially parallel to the reference center axis C0. It becomes.

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

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

This first tilted central axis C1 intersects the reference central axis C0 at an angle θ. In addition, as shown in the upper side of FIG. 2A, the first inclined virtual columnar body 41 has a cross section (a cross section perpendicular to the first inclined central axis C1) such that its long axis is located within the first plane P1. , has an elliptical shape with a minor axis a1 (same as the diameter of the first reference virtual column 40a) and a major axis b.

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 located outside the reference region 33 along the side surface of the first reference virtual column 40a (of the reference central axis C0). This area bulges out in the centrifugal direction.

In this 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 thread 30 of this embodiment is a double thread thread, the first inclined regions 34 provided at the root 32a of the two thread grooves 32 are located on both sides of the main body 20 in the x-axis direction. ing.

Note that even when the cross section of the first inclined virtual column 41 is circular with the same diameter a1 as the first reference virtual column 40a, the first inclined virtual column 41 can be tilted with respect to the reference central axis C0. , the first inclined region 34 can be made to bulge out more than the reference region 33, but in this embodiment, the amount of bulge can be reduced by making the cross section of the first inclined virtual column 41 into an elliptical shape as described above. I'm trying to increase it.

The second inclined area 35 is located on the side surface of the second inclined virtual column 42 which, like the first inclined virtual column 41, has a different attitude and shape from the first reference virtual column 40a and the second reference virtual column 40b. This is an area provided along the line. As shown in FIGS. 3A and 3B, the second inclined virtual column 42 is centered on a second inclined central axis C2 that obliquely intersects the reference central axis C0 within a second plane P2 parallel to the z-x plane. It is a columnar body.

This second tilted central axis C2 intersects the reference central axis C0 at the same angle θ as the first tilted central axis C1. Further, as shown in the upper part of FIG. 3A, the second inclined virtual columnar body 42 has a shape of a cross section (a cross section perpendicular to the second inclined central axis C2) such that the long axis is located within the second plane P2. , has an elliptical shape with a minor axis a1 (same as the diameter of the first reference virtual column 40a) and a major axis b. That is, the second inclined virtual column 42 has a different posture from the first inclined virtual column 41, but has the same shape.

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, which is 90 degrees different from the first inclined region 34, and the reference along the side surface of the first reference virtual column 40a. This is a region that bulges outward from the region 33 (in the centrifugal direction of the reference central axis C0). In this 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 this embodiment, since the male thread 30 is a double thread thread, the second inclined regions 35 provided at the bottoms 32a of the two thread grooves 32 are located on both sides of the main body 20 in the y-axis direction. Further, similarly to the first inclined virtual column 41, by making the cross section of the second inclined virtual column 42 elliptical as described above, the amount of bulge of the second inclined region 35 is increased. There is.

Furthermore, in the present embodiment, the inclination of the first inclination central axis C1 is upward to the left when viewed from the right side, and the inclination of the second inclination central axis C2 is upward to the left when viewed from the front. Therefore, when the first tilted central axis C1 is rotated about the reference central axis C0 and placed within the second plane P2, the first tilted central axis C1 is rotated relative to the reference central axis C0 by the second tilted central axis C2. The direction of inclination is the same as that of , and the slope is upward to the left when viewed from the front. That is, the first tilt center axis C1 and the second tilt center axis C2 are arranged so that when they are rotated around the reference center axis C0 and placed in the same plane, they are tilted in the same direction with respect to the reference center axis C0. is inclined to.

By doing so, in one of the two thread grooves 32, the second inclined region 35 whose distal end side is bulged out from the proximal end side is adjacent to the first inclined region 34 whose distal end side is bulged out from the proximal end side, On the other hand, it is possible to adjoin the first sloping region 34 whose proximal end bulges out from the distal end side, and the second slanted region 35 whose proximal end bulges out from the distal end side. Thereby, changes in the amount of bulge at the boundary between the first slope region 34 and the second slope region 35 can be reduced, and extreme steps or the like can be prevented from occurring.

In this embodiment, since the second inclined region 35 is provided closer to the proximal end of the main body 20 than the first inclined region 34, the second inclined central axis C2 is closer to the main body 20 than the first inclined central axis C1. It is located on the proximal side of the. Therefore, the intersection between the reference central axis C0 and the second tilted central axis C2 is located closer to the proximal end of the main body 20 than the intersection between the reference central axis C0 and the first tilted central axis C1.

4A and 4B are diagrams showing a state in which the mating connector 100 is connected to the connector 1. Note that FIG. 4A is a cross-sectional view taken along line II in FIG. 1A, and FIG. 4B is a cross-sectional view taken along line II-II in FIG. 1A. In addition, in FIGS. 4A and 4B, the mating connector 100 is shown with a chain double-dashed line, and an undeformed state is virtually shown.

The mating connector 100 is made of a suitable resin and, as shown in FIGS. 4A and 4B, includes a stepped cylindrical male luer 110 and a bottomed cylindrical lock ring 120 that is loosely fitted around the outer periphery of the male luer 110. , is equipped with.

A male luer tapered part 111 that fits into the female luer tapered part 21 is provided at the distal end of the male luer 110, and an infusion tube or the like (not shown) is connected to the proximal end. Furthermore, a flange portion 112 is provided on the proximal end side of the male luer taper portion 111 to abut on the lock ring 120 in the axial direction.

The lock ring 120 is provided with a female thread 130 on the inner circumferential surface thereof, which engages with the male thread 30. The female thread 130 is composed of a thread 131 corresponding to the thread groove 32 of the male thread 30 and a thread groove 132 corresponding to the thread 31 of the male thread 30. A through-hole 122 through which the male luer 110 is inserted is provided in the center of the bottom 121 of the lock ring 120, and the edge of the through-hole 122 abuts against the flange portion 112 from the base end side of the male luer 110. It has become. Note that the lock ring 120 may be formed integrally with the male luer 110.

When connecting the mating connector 100 to the connector 1, first insert the male luer taper part 111 into the female luer taper part 21 along the reference central axis C0 to fit it, and then rotate the lock ring 120 to tighten the male screw. 30 and the female screw 130 are screwed together. At this time, as the threading between the male thread 30 and the female thread 130 progresses, the bottom part 121 of the lock ring 120 presses the flange part 112 of the male luer 110 toward the connector 1 side. The fit of the tapered portion 21 is strengthened, and a fastening force is generated between the connector 1 and the mating connector 100. This provides a separation prevention function that prevents separation of the connector 1 and the mating connector 100.

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

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

As a result, the lock ring 120 and the main body 20 are appropriately elastically deformed, and the restoring force of this elastic deformation applies a larger pressing force to the contact portion between the male screw 30 and the female screw 130 than that of a general screw. As a result, the frictional force between the male screw 30 and the female screw 130 increases, making it difficult for the screw connection to loosen. In other words, a loosening prevention function for preventing the screwing between 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 column 41 and the second inclined virtual column 42 each having an elliptical cross section, and each have a reference central axis C0. Since it is provided over a relatively wide circumference of about 125 degrees, the contact area with the top 131a of the thread 131 of the female screw 130 is an appropriate size.

That is, in the first inclined region 34 and the second inclined region 35, unlike the conventional case where projections are provided, local contact with the female screw 130 of the mating connector 100 does not occur, so that the first inclined region 34 and the second inclined region 35 It is possible to reduce plastic deformation and wear in the inclined region 34, the second inclined region 35, or the top 131a of the thread 131. Furthermore, in this embodiment, in the first inclined region 34 and the second inclined region 35 of one thread groove 32, which side of the distal end side or the proximal end side is more bulged out is aligned, so that the first inclined region 34 and the second inclined region 35 are aligned. Also at the boundary of the second inclined region 35, local contact, catching, etc. do not occur.

Furthermore, by bulging out the first and second inclined regions 34 and 35, the pressing force can be dispersed in multiple directions, making it possible to further reduce plastic deformation and wear at the contact areas. Become. In particular, in this embodiment, since the directions of the pressing forces from the first inclined region 34 and the second inclined region 35 that are adjacent to each other are orthogonal to each other, the lock ring 120 is elastically deformed in the lateral direction due to one pushing force ( For example, when the first inclined region 34 and the second inclined region 34 are elastically deformed so as to be pushed apart in the y-axis direction, the second inclined region It is possible to synergistically exhibit the loosening prevention function by the inclined region 35.

Furthermore, in this 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 By making the inclination angles to be the same, the pressing forces of the first inclination region 34 and the second inclination region 35 are appropriately balanced, and the loosening prevention function is enhanced.

In this way, according to the connector 1, plastic deformation and wear at the contact portion can be reduced while properly exhibiting the loosening prevention function, so that the connector 1 can be disconnected from the mating connector 100 and then reconnected. Even in such cases, it is possible to appropriately exhibit the loosening prevention function.

In addition, in this embodiment, the short axis of the cross section of the first inclined virtual column 41 and the second inclined virtual column 42 is the same dimension (a1) as the diameter of the first reference virtual column 40a, It may have different dimensions. Further, the shape of the cross section of the first inclined virtual column 41 and the second inclined virtual column 42 is not limited to an elliptical shape, but may be circular as described above, or, for example, an elliptical shape. The shape may be oval, which is a shape similar to an ellipse such as an egg shape. Furthermore, the first inclined virtual column 41 and the second inclined virtual column 42 may have cross sections with different dimensions or shapes.

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

Further, the first slope area 34 and the second slope area 35 are not limited to being adjacent to each other within one screw groove 32, and the reference area 33 is provided between the first slope area 34 and the second slope area 35. You can do it like this. That is, the first inclined region 34 and the second inclined region 35 may be adjacent to each other within one screw groove 32 with the reference region 33 interposed therebetween.

Furthermore, the first inclined region 34 of one thread groove 32 and the first inclined region 34 of the other thread groove 32 are separated from each other (with different positions, postures, or cross-sectional shapes) of the first inclined virtual column 41. It may also be provided along the sides. Similarly, the second inclined region 35 of one thread groove 32 and the second inclined region 35 of the other thread groove 32 may be provided along the side surfaces of different second inclined virtual columns 42. .

Further, the first plane P1 including the first tilt central axis C1 and the reference central axis C2, and the second plane P2 including the second tilt central axis C2 and the reference central axis C0 are not limited to being orthogonal to each other, and other They may intersect each other at an angle of However, in order to effectively utilize the lateral elastic deformation of the lock ring 120 due to the pressing force of one side as described above, the first plane P1 and the second plane P2 should be aligned with each other at an angle of 70 degrees or more and 110 degrees or less. It is preferred that they intersect, more preferably they intersect with each other at an angle of 80 degrees or more and 100 degrees or less, and most preferably they intersect with 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 intersects with the first tilted central axis C1 and the second tilted central axis C2 is not particularly limited, but the bulge of the first tilted region 34 and the second tilted region 35 is It is preferable that the angle is such that the amount does not exceed the top 31a of the thread 31. Further, the first tilt central axis C1 and the second tilt central axis C2 may intersect the reference central axis C0 at mutually different angles.

Furthermore, when the first tilt central axis C1 and the second tilt central axis C2 are rotated around the reference central axis C0 and placed in the same plane, the first tilt central axis C1 and the second tilt central axis C2 are in the same tilt direction with respect to the reference central axis C0. is preferred, but is not limited to this. That is, depending on various settings such as the shapes and postures of the cross sections of the first inclined virtual column 41 and the second inclined virtual column 42, and the ranges of the first inclined area 34 and the second inclined area 35, the first inclined When the center axis C1 and the second tilted center axis C2 are rotated around the reference center axis C0 and placed in the same plane, the directions of inclination with respect to the reference center axis C0 may be opposite to each other.

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

Further, in this embodiment, the case where two inclined regions, 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 thread 31 and the thread groove 32 and the range of the main body 20 are Depending on the axial dimension, etc., one thread groove 32 may be provided with three or more inclined regions.

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

Further, instead of the bottom 32a of the thread groove 32, the top 31a of the thread 31 may be provided with a first slope region 34 and a second slope region 35. In this case, for example, the bottom 32a of the thread groove 32 is provided along the side surface of the first reference virtual column 40a, and the short axis of the cross section of the first inclined virtual column 41 and the second inclined virtual column 42 is set as a2. By making the major axis larger than this, it is possible to provide the first inclined region 34 and the second inclined region 35 that bulge outward from the side surface of the second reference virtual column 40b on the top 31a of the thread 31. Furthermore, in this case, the reference region 33 provided along the side surface of the second reference virtual column 40b may be provided on the tip end side of the top 31a of the thread 31.

Even when the first slope area 34 and the second slope area 35 are provided on the top 31a of the thread 31, the first slope area 34 and the second slope area 35 are formed in the thread groove 130 in the female thread 130 of the mating connector 100. Since it presses the root 132a of the thread groove 32, the same effect as when provided at the root 32a of the thread groove 32 can be achieved. It goes without saying that even in this case, each of the above-mentioned modifications can be applied. Further, the first inclined region 34 and the second inclined region 35 may be provided at both the bottom 32a of the thread groove 32 and the top 31a of the thread 31.

Furthermore, although not shown, the connector 1 may include a female screw instead of the male screw 30 and be connected to a mating connector having a 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, the first inclined region 34 is provided along the side surface of the first inclined virtual column 41 having an elliptical cross section whose short axis is located in the first plane P1, and whose short axis is located in the second plane P2. By providing the second inclined region 35 along the side surface of the second inclined virtual column body 42 having an elliptical cross section located inside, the bottom of the thread groove or the top of the thread of the female screw is aligned with the other side. It can be bulged towards the male thread. Therefore, even in the connector 1 that includes a female screw instead of the male screw 30, the same effect as in the case where the male screw 30 described above is provided can be achieved. Furthermore, even in this case, each of the above-mentioned variations can be applied.

Further, the connector 1 may include a male luer taper portion instead of the female luer taper portion 21, or may include both the female luer taper portion 21 and the male luer taper portion, Neither the female Luer taper portion 21 nor the male Luer taper portion may be provided.

Further, the connector 1 is not limited to being provided on a three-way stopcock, a T port, etc., but may be provided on, for example, other medical instruments, infusion tubes, etc. Further, it goes without saying that 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 embodiments described above, and it goes without saying that various changes can be made without departing from the gist of the present invention. It is.

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

1 Connector 30 Male thread 31 Thread 31a Top of thread 32 Thread groove 32a Bottom of thread groove 34 First inclined area 35 Second inclined area 40b Second reference virtual column 41 First inclined virtual column 42 Second inclined virtual column Column body 100 Mating connector 130 Female thread C0 Reference central axis C1 First tilted central axis C2 Second tilted central axis P1 First plane P2 Second plane

Claims (6)

A connector that is connected to a mating connector that is equipped with a screw consisting of a thread and a thread groove, and that is equipped with a mating screw that is threadedly engaged with the screw,
The top of the screw thread is provided along a side surface of a reference virtual column having a circular cross section centered on a predetermined reference central axis,
The bottom of the thread groove has at least two or more inclined regions partitioned in a continuous direction of the thread groove,
One of the inclined regions is provided along a side surface of a first inclined virtual column having a circular, elliptical or oval cross section centered on a first inclined central axis that obliquely intersects the reference central axis. is,
The tilted region adjacent to the one tilted region is centered on a second tilted central axis that obliquely intersects the reference central axis in a plane different from a plane that includes the reference central axis and the first tilted central axis. A connector characterized in that it is provided along a side surface of a second inclined virtual column having a circular, elliptical or oval cross section. A connector that is connected to a mating connector that is equipped with a screw consisting of a thread and a thread groove, and that is equipped with a mating screw that is threadedly engaged with the screw,
The bottom of the thread groove is provided along a side surface of a reference virtual column having a circular cross section centered on a predetermined reference central axis,
The top of the thread has at least two or more inclined regions partitioned in a continuous direction of the thread,
One of the inclined regions is provided along a side surface of a first inclined virtual column having a circular, elliptical or oval cross section centered on a first inclined central axis that obliquely intersects the reference central axis. is,
The tilted region adjacent to the one tilted region is centered on a second tilted central axis that obliquely intersects the reference central axis in a plane different from a plane that includes the reference central axis and the first tilted central axis. A connector characterized in that it is provided along a side surface of a second inclined virtual column having a circular, elliptical or oval cross section. The connector according to claim 1 or 2,
The first tilted central axis is rotated about the reference central axis and placed in a plane that includes the reference central axis and the second tilted central axis, the second tilted central axis is tilted relative to the reference central axis. A connector characterized by being inclined in the same direction as the central axis. The connector according to any one of claims 1 to 3,
A connector characterized in that a plane including the reference central axis and the first tilted central axis and a plane including the reference central axis and the second tilted central axis intersect with each other at an angle of 70 degrees or more and 110 degrees or less. . The connector according to any one of claims 1 to 4,
The connector is characterized in that the first inclined virtual column and the second inclined virtual column have the same cross-sectional shape. The connector according to any one of claims 1 to 5,
The connector, wherein the first tilted central axis and the second tilted central axis intersect the reference central axis at the same angle.

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