WO2014049777A1

WO2014049777A1 - Medical connector

Info

Publication number: WO2014049777A1
Application number: PCT/JP2012/074893
Authority: WO
Inventors: 上田　武彦
Original assignee: テルモ株式会社
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2014-04-03

Abstract

A medical connector is provided with a connector body (2) and a lock member (3). The connector body has an insertion section (22) which is inserted into a female connector (9), a protrusion (23), and a section (24) to be pressed which, when moving the lock member in the direction in which the engagement between the connector body and the female connector is released, is pressed in the direction opposite the insertion direction in which the insertion section is inserted into the female connector. The lock member has: a first cover section (31) which has a thread ridge (311) engaging with the thread groove (921) of the female connector; a second cover section (32) which covers a part of the connector body; a first pressing section (33) which presses the protrusion in the insertion direction; and a second pressing section (321) which, when moving the lock member in the direction in which the engagement between the connector body and the female connector is released, presses the section to be pressed, the section to be pressed being pressed in the direction opposite the insertion direction. One of the second pressing section and the section to be pressed has a helically curved surface, and the other is formed so as to be capable of engaging with the helically curved surface. Either the pitch or the direction of the helix of the helically curved surface is different from that of the thread ridge.

Description

Medical connector

The present invention relates to a medical connector, and more particularly to a medical connector that is provided on a tube or the like and connected to a female connector provided on another tube or the like.

Conventionally, as a connection tool for connecting medical tubes used for infusion and the like, a connection tool that can be used for both slip-type joining and locknut-type joining is known (for example, see Patent Document 1).
The connector described in Patent Document 1 includes a male luer connector (male connector) inserted into a female connector and a lock nut attached to the male connector. Among these, in the lock nut, on the inner surface of the portion covering the female connector, a thread groove portion (female screw) is formed which is screwed with a protrusion (male screw) formed at an end portion of the female connector.
When performing lock nut type joining using this connector, rotate the lock nut with the tip of the male connector inserted into the female connector, and the protrusion of the female connector and the thread groove of the lock nut And screw together. During the screwing, the lock nut presses the lock nut removal prevention portion formed on the male connector toward the female connector. With such a lock nut, the connection state between the female connector and the male connector is maintained.

In addition, a plurality of projecting portions projecting outward in the radial direction of the male connector are formed on the opposite side of the male connector from the tip portion with respect to the lock nut removal preventing portion, and the inner surface of the lock nut is in accordance with the projecting portion. A plurality of groove-shaped portions are formed. For this reason, the lock nut is slid to the base end side of the male connector in the state where the position of each protrusion and the position of each groove portion are aligned, so that the lock nut is not locked. In addition, the connection between the male connector and the female connector can be a slip-type joint.

Japanese Patent No. 3456241

In the connection tool described in Patent Document 1, the connection between the male connector and the female connector can be released by sliding the lock nut toward the proximal end side of the male connector. However, when an infusion solution such as a drug adheres to the interface between the male connector and the female connector, the male connector and the female connector may be firmly connected, and simply in the axial direction of the male connector. In some cases, the male connector cannot be easily detached from the female connector only by applying a force in the pulling direction along. For this reason, the structure which can implement | achieve easily cancellation | release of a connection with a male connector and a female connector has been desired.

An object of the present invention is to provide a medical connector that can be easily disconnected from a female connector.

A medical connector according to an aspect of the present invention is provided with a tubular connector main body, one end of which is inserted into a female connector, slidably provided on the connector main body, and engaged with the female connector. A locking member that locks to the female connector, wherein the connector body is provided at a distal end side in the insertion direction of the female connector, and is inserted into the female connector, and the insertion portion is inserted into the insertion portion. Is located on the base end side in the direction, and protrudes radially outward of the connector body, and is located on the base end side in the insertion direction with respect to the protrusion and releases the engagement with the female connector. When the lock member is moved in a direction, the pressed member is pressed in a direction opposite to the insertion direction, and the lock member is one of the female connectors when engaged with the female connector. A first covering part formed on the inner surface with a thread that is screwed into a thread groove formed in the female connector, a second covering part that covers a part of the connector body, the first covering part, A first pressing portion that is positioned between the second covering portions and presses the protruding portion in the insertion direction when engaged with the female connector, and the lock member in a direction that releases the engagement with the female connector. And a second pressing portion that presses the pressed portion in a direction opposite to the insertion direction, and one of the second pressing portion and the pressed portion has a spiral curved surface. The other is formed to be engageable with the spiral curved surface, and either the pitch or the direction of the spiral of the spiral curved surface is different from that of the screw thread.

According to the above aspect, when connecting the connector main body and the female connector, the insertion portion is inserted into the female connector, and the thread formed on the first covering portion of the lock member and the screw groove of the female connector are connected. In a screwed state, the lock member is rotated in one direction along the central axis of the lock member. Thereby, the lock member is rotated in the insertion direction of the connector main body to the female connector, and the first pressing portion of the lock member presses the protruding portion of the connector main body in the insertion direction. Therefore, the connection between the connector body and the female connector can be locked.

On the other hand, when releasing the connection between the connector body and the female connector, the lock member is rotated in the opposite direction to the locking. Then, the lock member moves while rotating in the direction opposite to the insertion direction, and the screw engagement between the screw thread and the screw groove is released. At this time, the second pressing portion provided on the locking member presses the pressed portion of the connector main body in a direction opposite to the insertion direction (that is, a direction away from the female connector). Therefore, it is possible to easily release the connection between the connector main body and the female connector.

Here, one of the second pressing portion and the pressed portion is a spiral curved surface (including a case where the spiral is not one turn) different from the screw thread of the first covering portion, or the same direction as the screw thread. However, it has spiral curved surfaces with different pitches, and the other is formed to be able to engage with the spiral curved surfaces. According to this, when the lock member is rotated so as to rotate and move in the direction opposite to the insertion direction, the second pressing portion and the pressed portion are engaged, and the connector main body is rotated along with the rotation of the lock member. Can be separated from the female connector while rotating in the same direction as the lock member with respect to the female connector. Therefore, even when the connector body and the female connector are firmly connected, the connector body can be easily detached from the female connector.

In the one aspect, it is preferable that a spiral pitch of the spiral curved surface is different from a pitch of the thread.
According to the above aspect, since the spiral pitch of the spiral curved surface is different from the pitch of the thread, when the lock member is rotated, the connector body is reliably rotated in the same direction as the lock member. Can do. Therefore, the connector main body can be reliably and easily removed from the female connector.
According to the aspect, the direction of the spiral curved surface is the same as the direction of the thread. According to this, the direction of the spiral curved surface is different from the direction of the screw thread when the lock member is rotated so as to rotate in the direction opposite to the insertion direction and the connector body is separated from the female connector. It can be made smaller than the case. Therefore, the connector body can be further easily removed from the female connector.

In the one aspect, it is preferable that a pitch of the spiral is smaller than a pitch of the thread.
Here, when the pitch of the spiral is larger than the pitch of the threads of the first covering portion, the amount of movement of the connector body in the direction opposite to the insertion direction is larger than the rotation angle of the lock member. In this case, the force for rotating the connector body, that is, the force for rotating the lock member is increased.
On the other hand, according to the above aspect, since the pitch of the spiral is smaller than the pitch of the thread, the amount of movement of the connector body with respect to the rotation angle of the lock member can be reduced. The force for rotational movement can be reduced. Therefore, the connector body can be more easily removed from the female connector.

In the one aspect, it is preferable that the second pressing portion is a spiral female screw extending along a central axis of the connector main body, and the pressed portion is a male screw that is screwed into the second pressing portion.
According to the said one aspect | mode, since a 2nd press part is an internal thread and a to-be-pressed part is an external thread, these can be formed easily. Further, since the second pressing portion and the pressed portion are screwed together, they can be reliably engaged, and with respect to the female connector with the rotational movement of the lock member in the direction away from the female connector. Thus, the connector body can be reliably rotated in the same direction.

In the said one aspect | mode, when the said connector main body and the said female connector are locked by the said locking member, the dimension between the said 2nd press part and the said to-be-pressed part along the connection direction of the said connector main body with respect to the said female connector Is preferably shorter than the dimension that allows the lock member to move along the connection direction when the thread of the first covering portion and the thread groove of the female connector are in a threaded state.
According to the above aspect, the second pressing portion and the pressed portion can be reliably engaged before the screwing of the screw groove of the female connector and the screw thread of the first covering portion is released. . According to this, with the rotational movement of the lock member, the connector main body can be reliably rotated in the direction away from the female connector. Therefore, the connector main body can be more easily removed from the female connector.

The top view which shows the connector which concerns on 1st Embodiment of this invention. Sectional drawing which shows the connector in the said 1st Embodiment. Sectional drawing which shows the connector in the said 1st Embodiment. Sectional drawing which shows the state just before the connection of the connector and female connector in the said 1st Embodiment is cancelled | released. Sectional drawing which shows the connector which concerns on 2nd Embodiment of this invention. Sectional drawing which shows the state just before the connection of the connector and female connector in the said 2nd Embodiment is cancelled | released.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing a medical connector 1 according to this embodiment. Specifically, FIG. 1 is a plan view of the connector 1 viewed from a direction orthogonal to the central axis A of the connector body 2 constituting the connector 1. FIG. 2 is a cross-sectional view of the connector 1 in which the lock member 3 of the connector 1 is broken, and FIG. 3 is a cross-sectional view showing the connector 1 and the female connector 9.
A medical connector 1 (hereinafter may be abbreviated as “connector”) 1 according to the present embodiment is provided at one end of a tube (not shown) as shown in FIGS. 1 to 3, and other tubes, three-way stopcocks, etc. This is a lock connector for connecting the tube to a female connector 9 provided at one end (not shown).

[Female connector configuration]
Here, the female connector 9 will be described first.
The female connector 9 is formed in a tubular shape as shown in FIG. 3, and the female connector 9 is disposed along the central axis of the female connector 9 (coaxial with the central axis A when the connector 1 is connected). A through hole 9 H is formed. One end of the female connector 9 is formed in a tapered shape in which the inner diameter of the through hole 9H increases toward the distal end side (that is, the side close to the connector 1). An opening 91 that is connected to the through hole 9H and into which the insertion portion 22 of the connector main body 2 to be described later is inserted is formed on the distal end surface of the female connector 9.
Further, a flange portion 92 that protrudes radially outward of the female connector 9 is formed at the distal end portion of the female connector 9. In the present embodiment, the flange portion 92 is formed to project in an annular shape along the circumferential direction of the female connector 9, and the flange portion 92 has two strips corresponding to a thread 311 of the lock member 3 to be described later. A thread groove 921 is formed.

[Configuration of the connector body]
As shown in FIGS. 1 to 3, the connector 1 includes a connector main body 2 and a lock member 3 attached to the connector main body 2.
The connector body 2 is a 6% luer taper connected to the female connector 9. The connector body 2 includes a shaft portion 21, an insertion portion 22, an enlarged diameter portion 23, a male screw 24, and a through hole 2 H that penetrates the connector body 2 along the center axis (coaxial with the center axis A) of the connector body 2. Have

The shaft portion 21 is formed in a tubular shape having a substantially uniform outer diameter and inner diameter, and a lock member 3 described later is attached to the shaft portion 21.
The insertion portion 22 and the enlarged diameter portion 23 are integrally formed at the tip end portion in the Z direction, which is the insertion direction of the connector main body 2 with respect to the female connector 9, in the shaft portion 21. Of these, the insertion portion 22 has a 6% taper conforming to ISO (International Organization for Standardization) 594.
Further, the enlarged diameter portion 23 is formed on the base end side in the Z direction (the direction opposite to the Z direction) from the insertion portion 22. Since the outer diameter of the enlarged diameter portion 23 is larger than the outer diameter of the shaft portion 21, the enlarged diameter portion 23 protrudes outward from the shaft portion 21 in the radial direction of the shaft portion 21. That is, the enlarged diameter portion 23 corresponds to the protruding portion of the present invention. A stepped portion 33 of the lock member 3 to be described later is brought into contact with the end surface 231 on the base end side in the Z direction of the enlarged diameter portion 23.

The male screw 24 is formed in a spiral shape along the central axis A on the outer surface of the shaft portion 21. The formation position of the end of the male screw 24 on the front end side in the Z direction is such that the lock member 3 is in the Z direction in a state where the above-described screw groove 921 is engaged with a thread 311 formed on the lock member 3 described later. Is a position spaced from the end surface 231 on the opposite side to the Z direction by a dimension shorter than the dimension that can be advanced and retracted along.

The male screw 24 is screwed with the female screw 321 in the lock member 3 when the lock member 3 engaged with the female connector 9 is rotationally moved in a direction away from the female connector 9 (a direction opposite to the Z direction). To do. Along with the rotational movement of the lock member 3, a pressing force is applied to the male screw 24 in the direction in which the connector body 2 is separated from the female connector 9. That is, the male screw 24 corresponds to the pressed part of the present invention. The engagement between the male screw 24 and the female screw 321 will be described in detail later.

[Configuration of locking member]
The lock member 3 fixes the connector body 2 to the female connector 9 in a state where the insertion portion 22 is inserted into the opening 91. The lock member 3 is formed in a cylindrical shape, and the connector main body 2 is inserted through a through hole 3H formed through the center axis (coaxial with the center axis A) of the lock member 3. Such a lock member 3 includes, in addition to the through hole 3H, a first covering portion 31 having a large outer diameter and an inner diameter, a second covering portion 32 having a small outer diameter and an inner diameter, the first covering portion 31 and the second covering portion 32. And a step portion 33 located between the covering portions 32.

Of the first covering portion 31 and the second covering portion 32, the first covering portion 31 is located on the tip end side in the Z direction when the lock member 3 is attached to the connector body 2, and the second covering portion 32 is It is located on the base end side in the Z direction with respect to one covering portion 31.
The first covering portion 31 is formed in a tubular shape that covers a part of the female connector 9 into which the insertion portion 22 is inserted when the connector body 2 and the female connector 9 are fixed. For this reason, the inner diameter of the first covering portion 31 is set in accordance with the outer diameter of the end of the female connector 9 on the proximal side in the Z direction, that is, the outer diameter of the flange portion 92.
On the inner surface of the first covering portion 31, a spiral two-thread thread 311 is formed along the central axis of the lock member 3. These screw threads 311 are screwed into the two thread grooves 921 described above.

The second covering portion 32 is formed in a cylindrical shape that covers a part of the shaft portion 21 in the connector main body 2. For this reason, the inner diameter of the second covering portion 32 is set according to the outer diameter of the shaft portion 21.
A spiral female thread 321 is formed on the inner surface of the second covering portion 32 along the central axis of the lock member 3. The formation direction of the female screw 321 (the direction in which the spiral moves away when viewed from the base end side in the Z direction) is the same as that of the screw thread 311, and in this embodiment, each formation direction is clockwise (clockwise). . Further, the pitch, lead and lead angle of the female screw 321 are smaller than the pitch, lead and lead angle of the thread 311. As will be described in detail later, the female screw 321 is a portion that applies a pressing force in the direction opposite to the Z direction to the male screw 24 in accordance with the rotational movement of the lock member 3 when the connector main body 2 is removed from the female connector 9. is there. That is, in the internal thread 321, the end surface that intersects the Z direction and faces the base end side in the Z direction corresponds to the second pressing portion of the present invention.

The step portion 33 is formed as a surface along the direction orthogonal to the central axis of the lock member 3 between the first cover portion 31 having a large inner diameter and the second cover portion 32 having a small inner diameter on the inner surface of the lock member 3. ing. When the connector main body 2 is fixed to the female connector 9, the stepped portion 33 abuts on the end surface 231 of the enlarged diameter portion 23 and applies a pressing force in the Z direction, which is a direction close to the female connector 9, to the end surface 231. Make it work. That is, the step portion 33 corresponds to the first pressing portion of the present invention.

[Fixing the connector body and female connector]
When the connector body 2 is fixed to the female connector 9, the following method is used.
First, the insertion portion 22 of the connector main body 2 is inserted into the opening 91 of the female connector 9.
Thereafter, the lock member 3 slidably and rotatably provided on the shaft portion 21 is slid along the shaft portion 21 toward the tip end side in the Z direction. Then, when the thread 311 of the first covering portion 31 comes into contact with the flange portion 92, the lock member 3 is rotated clockwise as viewed from the Z direction base end side. Thereby, the screw thread 311 and the screw groove 921 are screwed together, and the lock member 3 moves in the Z direction with rotation.

When the lock member 3 rotates and moves in the Z direction, the stepped portion 33 formed inside the lock member 3 comes into contact with the end surface 231 of the enlarged diameter portion 23 as shown in FIGS. In this state, when the lock member 3 is further rotated in the same direction, the stepped portion 33 presses the enlarged diameter portion 23 in the Z direction, that is, in the direction close to the female connector 9. Thereby, the connector main body 2 and the female connector 9 are closely connected. In this state, the engaged state (screwed state) between the screw thread 311 and the screw groove 921 is maintained, and the connector 1 is fixed to the female connector 9.

[Release fixing of connector body and female connector]
When the connector 1 and the female connector 9 fixed by the above method are released and the connector 1 is removed from the female connector 9, the following method is used.
First, the lock member 3 is rotated counterclockwise as viewed from the base end side in the Z direction. As a result, the lock member 3 rotates and moves in a direction opposite to the Z direction (a direction away from the female connector 9), and the stepped portion 33 is separated from the end surface 231. In this state, the engagement between the screw thread 311 and the screw groove 921 remains maintained.

Here, the formation position of the male screw 24 in the shaft portion 21 and the formation position of the female screw 321 in the lock member 3 are determined so that the engagement between the screw thread 311 and the screw groove 921 is released before the male screw 24 and the female screw 321 are engaged. Is formed at a position to engage.
Specifically, when the connector main body 2 and the female connector 9 are fixed by the lock member 3, the gap between the end of the male screw 24 on the distal end side in the Z direction and the end of the female screw 321 on the proximal end side in the Z direction. The dimension is set shorter than the dimension in which the lock member 3 can move along the Z direction in a state where the thread 311 and the thread groove 921 are engaged. In other words, the dimension obtained by subtracting the dimension between the end part on the Z direction base end side of the female screw 321 and the step part 33 from the dimension between the end part on the Z direction front end side and the end surface 231 in the male screw thread 24 is: The lock member 3 is set to be shorter than a dimension in which the lock member 3 can move along the Z direction in a state where the screw thread 311 and the screw groove 921 are engaged.

FIG. 4 is a cross-sectional view showing a state immediately before the connection between the connector 1 and the female connector 9 is released. Specifically, it is a cross-sectional view showing a state of the connector 1 in which the female screw 321 and the male screw 24 are engaged.
Therefore, as shown in FIG. 4, when the lock member 3 is rotationally moved in the direction opposite to the Z direction, the internal thread 321 and the external thread 24 are released before the engagement state between the thread 311 and the thread groove 921 is released. And are engaged (screwed).
Then, as the lock member 3 further rotates counterclockwise as viewed from the Z direction base end side and further moves in the direction opposite to the Z direction, the connector main body 2 moves relative to the connector 9 in the Z direction base. It moves slightly in the opposite direction while rotating counterclockwise when viewed from the end side. That is, the connector main body 2 rotates and moves in the same direction as the lock member 3. Accordingly, the connector main body 2 that is closely connected to the female connector 9 can be detached from the female connector 9 in accordance with the operation of removing the lock member 3 from the female connector 9.

Here, the pitch, lead, and lead angle of the male screw 24 and the female screw 321 are different from the pitch, lead, and lead angle of the thread 311 that is screwed into the screw groove 921. More specifically, the pitch, lead and lead angle of the male screw 24 and female screw 321 are smaller than the pitch, lead and lead angle of the thread 311. According to this, since the lock member 3 moves with respect to the connector main body 2 at a pitch of the thread groove 921 and the screw thread 311, the engagement between the female screw 321 and the male screw 24 becomes worse, and the connector main body 2 3 and rotate in the same direction.

For this reason, when the lock member 3 is rotated, the amount of movement of the connector main body 2 along the Z direction is smaller than the amount of movement of the lock member 3 along the Z direction with respect to the female connector 9. In other words, the amount of movement of the connector body 2 along the Z direction relative to the rotation angle is smaller than the amount of movement of the lock member 3 along the Z direction relative to the rotation angle of the lock member 3. Thereby, when releasing the connection of the female connector 9 and the connector main body 2, the rotational force which acts on the lock member 3 can be made small. Therefore, the connector 1 can be removed from the female connector 9 with a small rotational force.

[Effect of the first embodiment]
The connector 1 according to the present embodiment described above has the following effects.
When the connector body 2 and the female connector 9 are connected, the lock member 3 is viewed from the Z direction base end side with the insertion portion 22 inserted into the opening 91 and the thread 311 and the thread groove 921 engaged. Rotate clockwise. As a result, the lock member 3 is rotated and moved to the distal end side in the Z direction with the thread 311 and the screw groove 921 engaged with each other, so that the stepped portion 33 of the lock member 3 causes the diameter-enlarged portion 23 of the connector main body 2. Can be pressed in the Z direction. Accordingly, the connector main body 2 and the female connector 9 can be closely connected.

When releasing the connection between the connector body 2 and the female connector 9, the lock member 3 is rotated counterclockwise as viewed from the base end side in the Z direction. Then, the lock member 3 is rotationally moved in the direction opposite to the Z direction, and before the engagement between the screw thread 311 and the screw groove 921 is released, the male screw 24 of the connector body 2 and the female screw 321 of the lock member 3 Screwed together. When the lock member 3 is further rotated counterclockwise, the pitch of the screw thread 311 and the pitch of the screw thread 321 are different, so that the connector main body 2 rotates in the same direction as the lock member 3 rotates. As a result, the connector body 2 is rotationally moved in a direction away from the female connector 9. According to this, the engagement between the connector main body 2 and the female connector 9 can also be released by the operation of releasing the engagement between the lock member 3 and the female connector 9. Therefore, the connection between the connector 1 and the female connector 9 can be easily released.

Since the pitch of the female screw 321 is different from the pitch of the thread 311, the connector body 2 can be reliably rotated in the same direction as the lock member 3 when the lock member 3 is rotated. Therefore, the connector main body 2 can be reliably and easily removed from the female connector 9.
Further, the direction of the female screw 321 (spiral direction) is the same as that of the screw thread 311. According to this, the force when rotating the lock member 3 so as to rotate in the direction opposite to the Z direction to separate the connector main body 2 from the female connector 9 is different from the thread 311 in the direction of the female screw 321. It can be made smaller than the case. Therefore, the connector main body 2 can be more easily removed from the female connector 9.

The pitch of the male screw 24 and the female screw 321 is smaller than the pitch of the thread 311. According to this, when the male screw 24 and the female screw 321 are screwed together, the amount of movement of the connector body 2 with respect to the rotation angle of the lock member 3 (the amount of movement in the direction opposite to the Z direction) can be reduced. The force for rotating the lock member 3 can be reduced. Therefore, the connector main body 2 can be removed from the female connector 9 more easily.

Since the configuration in which the connector main body 2 is separated from the female connector 9 is the male screw 24 and the female screw 321, these can be easily formed in the connector main body 2 and the lock member 3. In addition, the male screw 24 and the female screw 321 can be reliably engaged (screwed) with the rotational movement of the lock member 3 in the direction opposite to the Z direction. Accordingly, the connector body 2 can be reliably rotated and moved in the same direction with respect to the female connector 9 with the rotational movement of the lock member 3 in the opposite direction.

The dimension between the end surface 231 of the enlarged diameter portion 23 and the end of the male screw 24 on the Z-direction distal end side, and the dimension between the stepped portion 33 and the end of the female screw 321 on the Z-direction proximal end side, The lock member 3 is set to be shorter than the dimension in which the lock member 3 can move along the Z direction in a state where the 311 and the thread groove 921 are engaged. According to this, the male screw 24 and the female screw 321 can be reliably engaged before the engagement between the screw thread 311 and the screw groove 92 is released. For this reason, the connector main body 2 can be reliably rotated and moved in the direction away from the female connector 9 as the lock member 3 rotates in the direction opposite to the Z direction. Therefore, the connector main body 2 can be removed from the female connector 9 more easily.

[Second Embodiment]
Next, a connector according to a second embodiment of the present invention will be described.
The connector according to this embodiment has the same configuration as that of the connector 1 described above, but differs in the configuration in which the connector main body is separated from the female connector 9 when the connection between the female connector 9 and the connector main body is released. Thus, the connector 1 is different. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 5 is a view showing the connector 1A according to the present embodiment.
The connector 1 A according to the present embodiment is provided at one end of the tube and connected to the female connector 9, similarly to the connector 1 described above. As shown in FIG. 5, the connector 1A includes a connector main body 2A and a lock member 3A.

The connector body 2A has the same configuration as the connector body 2 described above except that a rib 25 is formed so as to protrude from the outer surface instead of the male screw 24. The rib 25 corresponds to a pressed portion of the present invention and corresponds to a part of the screw thread 24, but the rib 25 has a size that is less than one round along the circumferential direction of the shaft portion 21. . However, the pitch, lead, and lead angle of the virtual spiral extending from the rib 25 are the same as those of the male screw 24 described above. Further, the position of the rib 25 on the front side in the Z direction is the same as the position on the front side of the male screw 24 in the Z direction.

The lock member 3 A has the same configuration and function as the lock member 3 described above except that a female screw 32 A 1 is formed instead of the female screw 321.
This female screw 32A1 corresponds to the second pressing portion of the present invention, and, like the female screw 321, when the lock member 3A is rotated and moved in the direction opposite to the Z direction, the female screw 32A1 comes into contact with the

rib

25 and 2A is rotated in the same direction. The female screw 32A1 corresponds to a part of the female screw 321, but is a single spiral around the inner circumference of the second covering portion 32. The pitch, lead, and lead angle of a virtual spiral extending the female screw 32A1 are The same as the female screw 321. Further, the position of the female screw 32A1 on the Z direction proximal end side is the same as the position of the female screw 321 on the Z direction proximal end side.

FIG. 6 is a cross-sectional view showing a state immediately before the connection between the connector 1A and the female connector 9 is released. Specifically, it is a cross-sectional view showing a state of the connector 1A in which the female screw 32A1 and the rib 25 are engaged.
Such a connector 1 A connects the connector body 2 A closely to the female connector 9 in the same manner as the connector 1 described above.
Further, when the lock member 3 is rotated in the direction opposite to the Z direction with the female connector 9 and the connector main body 2 connected, as shown in FIG. 6, the thread 311 of the lock member 3 and Before the threaded engagement with the screw groove 921 is released, the female screw 32A1 and the rib 25 are engaged (contacted). Then, with the rotational movement of the lock member 3 in the opposite direction, the end surface on the Z direction proximal end side of the female screw 32A1 presses the end surface on the Z direction distal end side of the rib 25 in the opposite direction. Thereby, the connector main body 1A is rotated in the same direction, and the connector main body 1A is separated from the female connector 9.
According to the connector 1A according to the present embodiment described above, the same effects as those of the connector 1 described above can be obtained.

[Modification of Embodiment]
The best configuration for implementing the present invention has been disclosed in the above description, but the present invention is not limited to this. That is, the description limited to the shape, material, and the like disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. For this reason, the description by the name of the member which removed the limitation of part or all of those shapes, materials, etc. is included in this invention.

In the first embodiment, the direction of the female screw 321 with which the male screw 24 engages (the direction of the spiral) is the same as the direction of the thread 311 with which the screw groove 921 engages. However, the present invention is not limited to this. Each may be different. Similarly, in the second embodiment, the direction of the female screw 32A1 with which the rib 25 engages is the same as the direction of the thread 311. However, the present invention is not limited to this, and the directions may be opposite to each other.

In the second embodiment, the internal thread 32A1 is formed on the lock member 3A and the rib 25 is formed on the connector body 2A. However, the present invention is not limited to this. That is, a male screw may be formed on the connector body, and a protrusion such as the rib 25 may be provided on a lock member that is provided to be rotatable and slidable with respect to the connector body. Moreover, you may change suitably the formation position, dimension, etc. of internal thread 32A1 and the rib 25. FIG.

In each of the embodiments described above, the

lock members

3 and 3A have the first covering portion 31 and the second covering portion 32 having different outer diameters, but the present invention is not limited thereto. For example, a region having different inner diameters is formed according to the outer diameter of the end of the female connector 9 and the outer diameter of the connector

main bodies

2 and 2A, and abuts against a part of the connector

main bodies

2 and 2A. Can be pressed to the tip end side in the Z direction, the lock member may be cylindrical with a uniform outer diameter.

In each of the above embodiments, the pitch of the male screw 24 and the female screw 321 and the pitch of the spiral obtained by extending the rib 25 and the female screw 32A1 are set to be smaller than the pitch of the thread 311 screwed with the screw groove 921. However, the present invention is not limited to this. For example, the former pitch may be larger than the latter pitch.

In each of the above embodiments, the screw thread 311 is a two-thread thread, and the screw groove 921 is a two-thread groove, but the present invention is not limited to this. That is, a single thread and a single thread may be used. In addition, the thread groove 921 is formed in the flange portion 92. However, the present invention is not limited to this, and the flange portion 92 may not be provided, and the thread groove 921 may be formed on the outer surface of the female connector 9.

The present invention can be used as a medical connector. For example, the present invention can be suitably used for a medical connector provided at an end of a medical tube or the like and connected to a female connector provided in another tube or a three-way stopcock.

DESCRIPTION OF

SYMBOLS

1,1A ...

Medical connector

2, 2A ... Connector

main body

3, 3A ... Lock member 9 ... Female connector 23 ... Expanded diameter part (protrusion part)
24 ... Male screw (pressed part)
31 ... 1st coating | coated part 32 ... 2nd coating | coated part 33 ... Level | step-difference part (1st press part)
311 ... Thread 321 ... Female screw (second pressing part)
921 ... Screw groove

Claims

A tubular connector body having one end inserted into the female connector;
A slidably provided on the connector body, and a locking member that engages with the female connector and locks the connector body to the female connector;
The connector body is
Provided on the distal end side in the insertion direction to the female connector, an insertion portion to be inserted into the female connector;
A protrusion that is located on the proximal end side in the insertion direction with respect to the insertion portion, and protrudes radially outward of the connector body,
When the lock member is moved in a direction to release the engagement with the female connector, the lock member is pressed in a direction opposite to the insertion direction. A pressed portion,
The locking member is
A first covering portion that covers a part of the female connector at the time of engagement with the female connector, and has an inner surface formed with a screw thread that engages with a screw groove formed in the female connector;
A second covering portion covering a part of the connector body;
A first pressing portion that is located between the first covering portion and the second covering portion and presses the protruding portion in the insertion direction when engaged with the female connector;
A second pressing portion that presses the pressed portion in a direction opposite to the insertion direction when the lock member is moved in a direction to release the engagement with the female connector;
Of the second pressing portion and the pressed portion, one has a spiral curved surface, and the other is formed to be engageable with the spiral curved surface,
Either of the pitch and direction of the spiral of the spiral curved surface is different from the screw thread.
The medical connector according to claim 1, wherein
The medical connector, wherein the spiral pitch of the spiral curved surface is different from the pitch of the thread.
The medical connector according to claim 2,
The helical connector has a smaller pitch than the thread pitch.
The medical connector according to any one of claims 1 to 3,
The second pressing portion is a helical female screw along the central axis of the connector body,
The medical connector, wherein the pressed portion is a male screw that is screwed into the second pressing portion.
The medical connector according to any one of claims 1 to 4,
When the connector main body and the female connector are locked by the locking member, the dimension between the second pressing portion and the pressed portion along the connecting direction of the connector main body with respect to the female connector is the first The medical connector, wherein the lock member is shorter than a dimension in which the lock member can move along the connection direction when the screw thread of the covering portion and the screw groove of the female connector are in a screwed state.