WO2013157610A1

WO2013157610A1 - Lock-type luer taper connector, and male connector and female connector in lock-type luer taper connector

Info

Publication number: WO2013157610A1
Application number: PCT/JP2013/061522
Authority: WO
Inventors: 佐野　嘉彦; 証英原田
Original assignee: ニプロ株式会社; 原田電子工業株式会社
Priority date: 2012-04-19
Filing date: 2013-04-18
Publication date: 2013-10-24
Also published as: JP6176857B2; JPWO2013157610A1

Abstract

[Problem] To prevent a connector from loosening or dislodging when not intended. [Solution] A lock-type luer taper connector which is provided with a male connector and a female connector each provided with a cylindrical part having a luer taper truncated cone shaped connection surface, the male connector having a nut which is rotatably inserted at the base part of the cylindrical part of the male connector, which controls movement in the axial direction by engaging with the base part, and which has a female screw, the female connector having ridges which protrude externally in the radial direction from the tip section of the cylindrical part of the female connector, and the female screw of the nut screwing in with the ridges in the tip section of the female connector and locking the nut, thus maintaining an interlock between the connection surfaces of the male connector and the female connector. The lock-type luer taper connector is characterised in that the female screw of the nut and/or the ridges in the female connector comprise a lock part which closely or tightly engages with the other among the female screw of the nut and the ridges in the female connector when in a screwed state, and applies resistance to the relative rotation of the nut and the female connector.

Description

Lock type luer taper connector and male and female connectors of the lock type luer taper connector

The present invention relates to a lock-type luer taper connector used for connecting pipelines in medical equipment, physics and chemistry equipment, and the like, and a male connector and a female connector of the lock-type luer taper connector.

The luer taper connector is a standard defined by ISO (International Organization for Standardization) 594-1, and is called 6% taper ("Lure taper" derived from the name of a German medical device manufacturer in the 19th century) ) And a male connector having a cylindrical portion having a truncated conical connection surface on the outer peripheral surface and a female connector having a cylindrical portion having a truncated conical connection surface of the luer taper on the inner peripheral surface. It is easy to make an airtight connection simply by inserting a male connector into a female connector and closely fitting the luer taper connection surfaces to each other, so it is often used for connecting pipelines for medical equipment, physics and chemistry equipment, etc. ing.

The lock-type luer taper connector has a structure for preventing unintentional loosening and detachment of the luer taper connector. For example, the standard defined by ISO 594-2 is shown in FIGS. b) and (c) show a plan view, a front view, and a longitudinal sectional view of the female connector, and as shown in FIG. A cylindrical portion 2 having a conical connection surface 2a on the outer peripheral surface, and an outer peripheral flange 2c that is rotatably inserted into a small diameter portion 2b of the base portion of the cylindrical portion 2 and is a large diameter portion of the base portion 2b. And a nut 3 having a female thread 3a of a double thread as well as a hooking portion 3e whose axial direction movement is restricted by the hooking, and the female connector 4 has a luer-tapered truncated conical connecting surface 5a on the inner peripheral surface The cylindrical part with And two projecting ridges 6 integrally projecting radially outward from the tip of the cylindrical portion 5, and the female screw 3 a of the double thread of the nut 3 of the male connector 1 is connected to the female connector 4. The

connection surfaces

2a and 5a of the male connector 1 and the female connector 4 are kept in close contact with each other by tightening the nuts 3 by screwing them into the two protrusions 6 at the tip of the connector.

However, in the lock-type luer taper connector defined by this ISO 594-2, the engaging portion 3e of the nut 3 is tightly inserted into the small diameter portion 2b of the base portion of the cylindrical portion 2 of the male connector 1 and the base portion is large. When the nut 3 is in close contact with the outer peripheral flange 2c, which is the diameter portion, so that the nut 3 can easily rotate together with the cylindrical portion 2 of the male connector 1, one of the female connector 4 and the male connector 1 is mistaken for the other. If it is twisted, the threaded state of the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 may be loosened, causing unintentional loosening or disengagement of the connector. When the male connector 1 side is twisted and the structure is large, there is a problem that the connector is liable to loosen or come off because the structure cannot follow the twist.

For this reason, conventionally, a cylindrical collar portion having a notch directed to the distal end portion covering the connection surface 2a is provided at the base portion of the tubular portion 2 of the male connector 1, and at the distal end portion of the tubular portion 5 of the female connector 4. Instead of the protrusion 6, a protrusion protruding in the diameter direction is provided, and when the male connector 1 is inserted into the female connector 4, the protrusion of the female connector 4 is fitted into the notch of the collar portion of the male connector 1. The

joint surfaces

5a and 2a of the connector 4 and the male connector 1 are prevented from rotating together, and a nut 3 provided on the male connector 1 so as to cover the collar portion is provided near the base portion of the tubular portion 5 of the female connector 4 There has also been proposed a lock-type luer taper connector that is screwed with the protruding ridge 6 to prevent unintentional loosening and disengagement of the luer taper connector (Japanese Patent Laid-Open No. 2009-189639).

However, in the conventional lock-type luer taper connector described in the above-mentioned patent document, the

joint surfaces

5a and 2a of the female connector 4 and the male connector 1 are prevented from rotating together, but the nut 3 is prevented from rotating against them. Therefore, one of the female connector 4 and the male connector 1 is twisted while the nut 3 is held and fixed by hand, or one of the female connector 4 and the male connector 1 is fixed. When a twisting force is applied to the nut 3, the nut 3 rotates relative to the female connector 4 and the male connector 1, and the female screw 3 a of the nut 3 and the protrusion 6 of the female connector 4 are screwed together. There is a problem that the connector loosens and unintentional loosening or disconnection of the connector occurs.

Further, since the nut 3 covers the notch of the collar portion of the male connector 1, it is not easy to fit the protruding portion of the female connector 4 into the notch of the collar portion of the male connector 1, and the fitting is not possible. If the nut 3 is tightened by mistake without causing the protrusion, the protruding portion of the female connector 4 comes into contact with the front end surface of the collar portion of the male connector 1 and the connection of the luer taper connector becomes insufficient.

In order to avoid the above problem, it is conceivable that the nut 3 can be slid so as to expose the notch of the collar portion of the connector 1. Since it is small, it is still not easy to fit the protruding portion of the female connector 4 into the notch of the collar portion of the male connector 1, and when the above is performed, the small diameter portion 2 b of the base portion of the male connector 1 is connected to the nut 3. There is a problem that the male connector 1 becomes longer because it is necessary to lengthen the slide.

The present invention advantageously solves the above-described problems of the conventional lock-type luer taper connector, and the lock-type luer taper connector according to the first aspect of the present invention includes:
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector has a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the base portion and has a female screw,
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. For luer taper connectors,
At least one of the female screw of the nut and the protrusion of the female connector is in close contact with or engaged with the other in the threaded state of the female screw of the nut and the protrusion of the female connector, and the nut and the female connector It has a lock part which gives resistance to relative rotation.

The male connector of the lock-type luer taper connector according to the first aspect of the present invention is:
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector has a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the base portion and has a female screw,
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. In the male connector of the luer taper connector,
The female screw of the nut is in close contact with or engaged with the protrusion of the female connector in a screwed state of the female screw of the nut and the protrusion of the female connector, and resists relative rotation between the nut and the female connector. It has the lock part which gives.

And the female connector of the lock | rock type luer taper connector in the 1st aspect of this invention is the following.
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector has a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the base portion and has a female screw,
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. In the female connector of the luer taper connector,
The protrusion of the female connector is in close contact with or engaged with the female screw of the nut in a screwed state of the protrusion of the female connector and the female screw of the nut, and resists relative rotation between the nut and the female connector. It has the lock part which gives.

In the lock-type luer taper connector and the male connector and the female connector thereof according to the first aspect of the present invention, the male connector is inserted into the female connector, and the connection surfaces of the luer taper are closely fitted to each other so as to be airtight. Connection is achieved. In addition, a female screw of a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and is restricted from moving in the axial direction by engaging with the base portion is screwed into the protrusion at the tip portion of the female connector. By tightening the nut, the close fitting of the connection surfaces of the male connector and the female connector is maintained. Then, the lock portion provided on at least one of the female screw of the nut and the protrusion of the female connector is in close contact with or engaged with the other while the female screw of the nut and the protrusion of the female connector are engaged with each other. Provides resistance to relative rotation with the connector.

Therefore, according to the lock-type luer taper connector and the male connector and the female connector thereof according to the first aspect of the present invention, the other of the nut and the male connector is twisted while being held and fixed by hand. Even if a torsional force is applied to the other connector or nut while one of the female connector and the male connector is fixed, a torsional force is applied to the male connector while the female connector is fixed. Even if the nut tries to rotate with the male connector, the lock part provides resistance to the relative rotation of the nut and female connector, so the nut will not rotate with respect to the female connector. It is possible to prevent unintentional loosening and disconnection of the connector due to loosening of the threaded state between the female connector and the protrusion of the female connector.

Moreover, according to the lock type luer taper connector and the male connector and the female connector thereof according to the first aspect of the present invention, the lock portion provides resistance to the relative rotation between the nut and the female connector simply by tightening the nut. In order to prevent unintentional loosening and disconnection of the connector, the connection of the luer taper connector is not insufficient.

In the lock type luer taper connector according to the first aspect of the present invention, the lock portion may be provided only on the protrusion of the female connector. In this case, the male connector has a normal nut. Since the conventional one is sufficient, the lock type luer taper connector of the present invention can be configured using the conventional male connector.

In the lock type luer taper connector according to the first aspect of the present invention, the lock portion may be provided only on the female screw of the nut. In this case, the female connector has a normal protrusion. Since the conventional one is sufficient, the lock type luer taper connector of the present invention can be configured using the conventional female connector.

On the other hand, the lock type luer taper connector according to the second aspect of the present invention is:
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector is a nut having a female screw with a hook portion that is rotatably inserted into a small diameter portion of the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the large diameter portion of the base portion. Have
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. For luer taper connectors,
The hook engaging portion of the nut is rotatably inserted into the small diameter portion of the base portion of the cylindrical portion of the male connector, and the axial movement is restricted by the engagement with the large diameter portion of the base portion,
In the male connector, at least one of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion is the other in the engaged state of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion. It has a friction torque reduction part which reduces the friction torque of relative rotation.

The male connector of the lock-type luer taper connector according to the second aspect of the present invention is
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector is a nut having a female screw with a hook portion that is rotatably inserted into a small diameter portion of the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the large diameter portion of the base portion. Have
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. In the male connector of the luer taper connector,
The hook portion of the nut is rotatably inserted into the small diameter portion of the base portion of the cylindrical portion, and the axial movement is restricted by the engagement with the large diameter portion of the base portion,
At least one of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion is relatively rotated with the other in the engaged state of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion. It has a friction torque reducing portion that reduces the friction torque.

In the lock type luer taper connector and the male connector thereof according to the second aspect of the present invention, an airtight connection is achieved by inserting the male connector into the female connector and closely fitting the connection surfaces of the luer taper. Is done. In addition, the female screw of the nut having a hook portion that is rotatably inserted into the small diameter portion of the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by the hooking with the large diameter portion of the base portion is connected to the female connector. The fitting surface of the male connector and the female connector is kept in close contact with each other by tightening the nut into the female connector by screwing with the protrusion at the tip of the female connector. And the engaging part of the nut is rotatably inserted into the small diameter part of the base part of the cylindrical part of the male connector, and the engaging part of the nut and the large diameter part of the base part of the cylindrical part of the male connector, The friction torque reducing portion included in at least one of these reduces the friction torque of the relative rotation between the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion.

Therefore, according to the lock-type luer taper connector and the male connector thereof in the second aspect of the present invention, even if the tubular portion of the male connector or the tube connected thereto is accidentally twisted with respect to the female connector, The engaging part of the nut is rotatably inserted into the small diameter part of the base part of the cylindrical part of the male connector, and the friction torque reducing part is rotated relative to the engaging part of the nut and the large diameter part of the base part of the cylindrical part. Since the dynamic friction torque is reduced, it is possible to prevent the cylindrical portion of the male connector and the nut from rotating together. Therefore, the screwed state of the female screw of the nut and the protrusion of the female connector is loosened and the connector is not intended. It is possible to prevent loosening and detachment.

Moreover, according to the lock type luer taper connector and the male connector of the second aspect of the present invention, the nut loosely inserted into the small diameter portion of the base portion of the cylindrical portion of the male connector is simply tightened into the female connector. Since the loosely engaged engagement part and the friction torque reducing part prevent the male connector cylindrical part and the nut from rotating together, the luer taper connector can be connected to prevent unintentional loosening and disengagement of the connector. There is no shortage or long male connector.

In the lock type luer taper connector according to the second aspect of the present invention and the male connector thereof, the friction torque reducing portion is formed on the engaging portion of the nut and on the large diameter portion of the base portion of the cylindrical portion of the male connector. For example, the cylindrical portion of the male connector may be a conventional one, and the female connector may be a conventional one. The lock type luer taper connector of the invention can be constructed at low cost.

Further, in the lock type luer taper connector of the second aspect of the invention and the male connector thereof, the friction torque reducing portion is formed on the engaging portion of the nut and on the large diameter portion of the base portion of the cylindrical portion of the male connector. It may have a low friction material, such as a fluororesin coating layer or a fluororesin sheet, provided in this case. In this case as well, the cylindrical part of the male connector is conventional, and the female connector is also conventional. Therefore, the lock type luer taper connector of the present invention can be constructed at low cost.

In the lock-type luer taper connector and the male connector according to the second aspect of the present invention, the friction torque reducing portion projects from the large-diameter portion of the base portion of the cylindrical portion toward the engaging portion of the nut. In this case, the nut of the male connector may be a conventional one, and the female connector may be a conventional one. Therefore, the lock type luer taper of the present invention may be used. The connector can be configured at low cost.

(A), (b) and (c) show the configuration of an embodiment of the female connector of the first aspect of the present invention in the first embodiment of the lock type luer taper connector of the first aspect of the present invention. It is a top view, a front view, and a longitudinal sectional view. (A) And (b) is a perspective view which shows the female connector in the lock | rock type luer taper connector of the said Example seeing from a back side, and a longitudinal cross-sectional view which shows the connection state of the female connector and a normal male connector. . (A), (b) and (c) show the configuration of one embodiment of the female connector of the first aspect of the present invention in the second embodiment of the lock type luer taper connector of the first aspect of the present invention. It is a top view, a front view, and a longitudinal sectional view. (A) And (b) is a perspective view which shows the female connector in the lock | rock type luer taper connector of the said Example seeing from a back side, and a longitudinal cross-sectional view which shows the connection state of the female connector and a normal male connector. . (A), (b) and (c) show the configuration of one embodiment of the female connector of the first aspect of the present invention in the third embodiment of the lock type luer taper connector of the first aspect of the present invention. It is a top view, a front view, and a longitudinal sectional view. (A) And (b) is a perspective view which shows the female connector in the lock | rock type luer taper connector of the said Example seeing from a back side, and a longitudinal cross-sectional view which shows the connection state of the female connector and a normal male connector. . (A), (b) and (c) show the configuration of one embodiment of the female connector of the first aspect of the present invention in the fourth embodiment of the lock type luer taper connector of the first aspect of the present invention. It is a top view, a front view, and a longitudinal sectional view. (A) And (b) is a perspective view which shows the female connector in the lock | rock type luer taper connector of the said Example seeing from a front side, and a longitudinal cross-sectional view which shows the connection state of the female connector and a normal male connector. . (A) And (b) is a longitudinal section showing the structure of the nut of one embodiment of the male connector of the first aspect of the present invention in the fifth embodiment of the lock type luer taper connector of the first aspect of the present invention. It is a longitudinal cross-sectional view which shows the connection state of the figure and the male connector with the nut, and a normal female connector. (A), (b) and (c) are the configurations of the nut of one embodiment of the male connector of the first aspect of the present invention in the sixth embodiment of the lock-type luer taper connector of the first aspect of the present invention. FIG. 5 is a front view and a longitudinal sectional view showing the connection between the male connector having a nut and a normal female connector. (A) And (b) is the front which shows the structure of the nut of 1st Example of the male connector of 2nd aspect of this invention in 1st Example of the lock | rock type luer taper connector of 2nd aspect of this invention. It is a figure and a longitudinal cross-sectional view, (c) is a longitudinal cross-sectional view which shows the connection state of the male connector which has the nut, and a normal female connector. (A) And (b) is the front which shows the structure of the nut of 2nd Example of the male connector of 2nd aspect of this invention in 2nd Example of the lock | rock type luer taper connector of 2nd aspect of this invention. It is a figure and a longitudinal cross-sectional view, (c) is a longitudinal cross-sectional view which shows the connection state of the male connector which has the nut, and a normal female connector. (A) and (b) are the cylindrical portion and nut of the third embodiment of the male connector of the second aspect of the present invention in the third embodiment of the lock-type luer taper connector of the second aspect of the present invention. It is a longitudinal cross-sectional view which shows a structure, (c) is a longitudinal cross-sectional view which shows the connection state of the male connector which has the cylindrical part and a nut, and a normal female connector. (A), (b), (c) and (d) are a plan view, a front view and a longitudinal sectional view showing a configuration of a female connector in a conventional lock type luer taper connector, and a male connector connected to the female connector. FIG.

Hereinafter, embodiments of the present invention will be described in detail by way of examples based on the drawings. 1 (a), (b) and (c) show one embodiment of the female connector of the first aspect of the present invention in the first embodiment of the lock-type luer taper connector of the first aspect of the present invention. FIG. 2A and FIG. 2B are a perspective view showing the female connector in the lock-type luer taper connector of the above embodiment as viewed from the rear side and its plan view, front view and longitudinal sectional view showing the configuration of the example. It is a longitudinal cross-sectional view which shows the connection state of a female connector and a normal male connector, In the figure, the part similar to a prior art example is shown with the same code | symbol.

That is, the lock-type luer taper connector of the first embodiment also has a plastic male connector 1 having a cylindrical portion 2 having a luer taper (6% taper) truncated conical connection surface 2a on the outer peripheral surface, and a lure. A plastic female connector 4 having a cylindrical portion 5 having a tapered conical connecting surface 5a on the inner peripheral surface, and the male connector 1 is also a base portion of the cylindrical portion 2 of the male connector 1 2b, and a plastic nut 3 having a female thread 3a of a double thread and having a plastic thread 3a that is controlled to move in the axial direction by engaging with the outer peripheral flange 2c of the base 2b. 4 is also a part of a male thread of a double thread that protrudes integrally from the distal end of the tubular portion 5 of the female connector 4 radially outward to oppose each other and extends in the circumferential direction. The male connector 1 has two protrusions 6, the female thread 3 a of the double thread of the nut 3 is screwed into the two protrusions 6 at the tip of the female connector 4, and the nut 3 is tightened. The close fitting of the connection surfaces 2a and 5a with the female connector 4 is maintained.

However, the lock type luer taper connector of the first embodiment is different from the conventional one in that the protrusion 6 serving as the male screw of the female connector 4 has a protrusion between the female screw 3a of the nut 3 of the male connector 1 and the female connector 4. For example, the height of the lock 6 is lower than that of the ridge 6, for example, as a lock portion that tightly engages with the female screw 3a of the nut 3 in a screwed state with the ridge 6 to provide resistance to relative rotation between the nut 3 and the female connector 4. Two lock protrusions 7 having a square bar shape are provided, and each of these lock protrusions 7 is an outer peripheral surface of the cylindrical portion 5 from a return side flank surface (upward side surface in FIG. 1A) of the protrusion 6. The cylindrical portion 5 and the ridge 6 are integrally projected so as to extend in the axial direction of the cylindrical portion 5.

Further, in the lock type luer taper connector of the first embodiment, the tubular portion 5 of the female connector 4 has slits 5b that are located on both sides of each lock projection 7 and extend in the axial direction of the tubular portion 5. Thus, each lock projection 7 and the cylindrical portion 5 in the vicinity thereof are separated from other portions in the circumferential direction, and are easily elastically deformed in the radial direction.

In the lock type luer taper connector according to the first embodiment having such a configuration, the tubular portion 2 of the male connector 1 is inserted into the female connector 4 so that the luer taper connection surfaces 5a and 2a are closely fitted to each other. By doing so, an airtight connection of the connector is achieved. Further, a female thread 3a of a double thread of a nut 3 that is rotatably inserted into the base 2b of the cylindrical part 2 of the male connector 1 and is restricted from moving in the axial direction by engaging with the outer peripheral flange 2c of the base 2b, The fitting surfaces 5a and 2a of the male connector 1 and the female connector 4 are closely fitted to each other by tightening the nut 3 by screwing into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4. The match is maintained.

In this case, two lock protrusions 7 provided only on the protrusion 6 out of the female thread 3 a of the nut 3 and the protrusion 6 of the female connector 4 are the protrusions of the female thread 3 a of the nut 3 and the female connector 4. 6, the thread of the female screw 3 a of the nut 3 is pushed in and elastically or elasto-plastically deformed, and the nut 3 and the female connector 4 are tightly engaged with the thread of the female screw 3 a. Resistance to the relative rotation of the two locking projections 7, and the connecting surface 5 a of the cylindrical portion 5 positioned inward in the radial direction of the two locking projections 7 is pressed against the connecting surface 2 a of the cylindrical portion 2 of the male connector 1. The cylindrical portion 2 of the male connector 1 is clamped.

Therefore, according to the lock type luer taper connector and the female connector 4 of this embodiment, one of the nut 3 and the cylindrical portion 2 of the male connector 1 is held and fixed by hand, and the other is twisted. Even if one of the female connector 4 and the male connector 1 is fixed or a twisting force is applied to the other connector or the nut 3, the male connector 1 is further fixed while the female connector 4 is fixed. Even if the nut 3 tries to rotate together with the male connector 1 due to a torsional force, the lock projection 7 gives resistance to the relative rotation between the nut 3 and the female connector 4, so that the nut 3 rotates relative to the female connector 4. Therefore, it is possible to prevent unintentional loosening or disengagement of the connector due to loosening of the screwed state of the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4.

In addition, according to the lock type luer taper connector and the female connector 4 of this embodiment, the lock projection 7 gives resistance to the relative rotation between the nut 3 and the female connector 4 just by tightening the nut 3. In order to prevent unintentional loosening and disconnection, the connection of the luer taper connector is not insufficient. In addition, the cylindrical portion 5 of the female connector 4 pushed by the lock protrusion 7 sandwiches the cylindrical portion 2 of the male connector 1, and the relative rotation between the cylindrical portion 2 of the male connector 1 and the female connector 4 is also performed. Since resistance is given, even if one of the female connector 4 and the cylindrical portion 2 of the male connector 1 is twisted, the screwed state between the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 is loosened. It is possible to prevent unintentional loosening and disengagement.

Further, according to the lock type luer taper connector of this embodiment, the locking projection 7 is provided only on the protrusion 6 of the female connector 4 instead of both the male connector 1 and the female connector 4. Since 1 can be a conventional one having a normal nut 3, the conventional male connector 1 is used to constitute the lock-type luer taper connector of the present invention, and the effects of the present invention can be achieved.

3 (a), 3 (b) and 3 (c) show the construction of one embodiment of the female connector of the first aspect of the present invention in the second embodiment of the lock type luer taper connector of the first aspect of the present invention. FIG. 4 (a) and FIG. 4 (b) are a perspective view showing the female connector in the lock-type luer taper connector of the above embodiment as seen from the back side, and its female connector. It is a longitudinal cross-sectional view which shows the connection state with a normal male connector, In the figure, the part similar to the previous Example is shown with the same code | symbol.

That is, in the lock type luer taper connector of the second embodiment, the two lock projections 7 as the lock portions are shorter in the axial direction of the tubular portion 5 than the lock projection 7 in the first embodiment, respectively, and the female connector 4 has the same height as the ridge 6 and is inclined substantially in parallel with the return-side flank surface (upward side surface in FIG. 2A) of the ridge 6, and the cylindrical shape of the female connector 4 The only difference from the first embodiment is that the portions 5 are located on both sides of each locking projection 7 and do not have slits 5b extending in the axial direction of the cylindrical portion 5. Since the point is configured in the same manner as in the first embodiment, detailed description is omitted here.

In the lock type luer taper connector of the second embodiment having such a configuration, the tubular portion 2 of the male connector 1 is inserted into the female connector 4 and the luer taper connecting surface 5a, By tightly fitting 2a together, an airtight connection of the connector is achieved. Further, a female thread 3a of a double thread of a nut 3 that is rotatably inserted into the base 2b of the cylindrical part 2 of the male connector 1 and is restricted from moving in the axial direction by engaging with the outer peripheral flange 2c of the base 2b, The fitting surfaces 5a and 2a of the male connector 1 and the female connector 4 are closely fitted to each other by tightening the nut 3 by screwing into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4. The match is maintained.

In this case, two lock protrusions 7 provided only on the protrusion 6 out of the female thread 3 a of the nut 3 and the protrusion 6 of the female connector 4 are the protrusions of the female thread 3 a of the nut 3 and the female connector 4. 6 is pressed against the return side flank surface of the female screw 3a of the nut 3 (right side surface in FIG. 4 (b)) and is in close contact with the return side flank surface of the female screw 3a. Resistance is applied to the relative rotation between the nut 3 and the female connector 4 while being plastically deformed.

In addition, according to the lock type luer taper connector and the female connector 4 of this embodiment, the lock projection 7 gives resistance to the relative rotation between the nut 3 and the female connector 4 just by tightening the nut 3. In order to prevent unintentional loosening and disconnection, the connection of the luer taper connector is not insufficient.

5 (a), (b) and (c) show the construction of one embodiment of the female connector of the first aspect of the present invention in the third embodiment of the lock type luer taper connector of the first aspect of the present invention. FIG. 6 (a) and FIG. 6 (b) are a perspective view showing the female connector in the lock-type luer taper connector of the above embodiment as seen from the back side, and its female connector. It is a longitudinal cross-sectional view which shows the connection state with a normal male connector, In the figure, the part similar to the previous Example is shown with the same code | symbol.

That is, the lock-type luer taper connector of the third embodiment is different from the first embodiment only in that the two lock protrusions 7 as the lock portions protrude in a hook shape from the top surface of the protrusion 6 of the female connector 4. The second embodiment is different from the second embodiment, and the other points are configured in the same manner as the second embodiment, and thus detailed description thereof is omitted here.

In the lock-type luer taper connector of the third embodiment having such a configuration, as in the previous embodiment, the tubular portion 2 of the male connector 1 is inserted into the female connector 4 to connect the luer taper connection surfaces 5a, By tightly fitting 2a together, an airtight connection of the connector is achieved. Further, a female thread 3a of a double thread of a nut 3 that is rotatably inserted into the base 2b of the cylindrical part 2 of the male connector 1 and is restricted from moving in the axial direction by engaging with the outer peripheral flange 2c of the base 2b, The fitting surfaces 5a and 2a of the male connector 1 and the female connector 4 are closely fitted to each other by tightening the nut 3 by screwing into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4. The match is maintained.

In this case, two lock protrusions 7 provided only on the protrusion 6 out of the female thread 3 a of the nut 3 and the protrusion 6 of the female connector 4 are the protrusions of the female thread 3 a of the nut 3 and the female connector 4. 6 is pressed against the bottom surface of the female screw 3a of the nut 3 in a screwed state with the nut 6, and the nut 3 and the female connector 4 are relatively deformed in close contact with the bottom surface of the female screw 3a while being elastically or elastoplastically deformed. Resist the rotation.

7 (a), (b) and (c) show the construction of one embodiment of the female connector of the first aspect of the present invention in the fourth embodiment of the lock-type luer taper connector of the first aspect of the present invention. FIG. 8 (a) and FIG. 8 (b) are a perspective view showing the female connector in the lock type luer taper connector of the above embodiment as seen from the back side, and its female connector. It is a longitudinal cross-sectional view which shows the connection state with a normal male connector, In the figure, the part similar to the previous Example is shown with the same code | symbol.

That is, in the lock-type luer taper connector of this fourth embodiment, the two lock projections 7 as the lock portions are respectively the forward flank surfaces of the protrusions 6 of the female connector 4 (the downward side surface in FIG. 7A). It differs from the previous third embodiment only in that it protrudes in the form of a bowl in the axial direction of the cylindrical portion 5 from the tip of the cylindrical portion 5 to the distal end surface, and the other points differ from the previous third embodiment. Since the configuration is the same, detailed description is omitted here.

In the lock type luer taper connector of the fourth embodiment having such a configuration, the tubular portion 2 of the male connector 1 is inserted into the female connector 4 and the luer taper connecting surface 5a, By tightly fitting 2a together, an airtight connection of the connector is achieved. Further, a female thread 3a of a double thread of a nut 3 that is rotatably inserted into the base 2b of the cylindrical part 2 of the male connector 1 and is restricted from moving in the axial direction by engaging with the outer peripheral flange 2c of the base 2b, The fitting surfaces 5a and 2a of the male connector 1 and the female connector 4 are closely fitted to each other by tightening the nut 3 by screwing into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4. The match is maintained.

In this case, two lock protrusions 7 provided only on the protrusion 6 out of the female thread 3 a of the nut 3 and the protrusion 6 of the female connector 4 are the protrusions of the female thread 3 a of the nut 3 and the female connector 4. The nut 3 and the female connector are pressed against the advancing flank surface of the female screw 3a of the nut 3 in a screwed state with the nut 6, and are elastically or elastoplastically deformed in close contact with the advancing flank surface of the female screw 3a. Resistance is given to relative rotation with respect to 4.

9 (a) and 9 (b) show the configuration of the nut of one embodiment of the male connector of the first aspect of the present invention in the fifth embodiment of the lock type luer taper connector of the first aspect of the present invention. It is a longitudinal cross-sectional view and the longitudinal cross-sectional view which shows the connection state of the male connector with its nut, and a normal female connector, In the figure, the part similar to a prior art example is shown with the same code | symbol.

That is, the lock-type luer taper connector of the fifth embodiment also has a plastic male connector 1 having a cylindrical portion 2 having a luer taper (6% taper) truncated conical connection surface 2a on the outer peripheral surface, and a lure. A female connector 4 having a cylindrical portion 5 having a tapered conical connecting surface 5a on the inner peripheral surface, and the male connector 1 is also connected to a base portion 2b of the cylindrical portion 2 of the male connector 1. It has a plastic nut 3 that is inserted in a movable manner and whose axial movement is restricted by engagement with the outer peripheral flange 2c of the base 2b and has a female thread 3a of a double thread, while the female connector 4 is also The two ridges 6 as a part of the male thread of the double thread that protrudes integrally from the front end of the cylindrical portion 5 of the female connector 4 radially outward to each other and extends in the circumferential direction. The Then, the female thread 3 a of the double thread of the nut 3 is screwed into the two protrusions 6 at the tip of the female connector 4 and the nut 3 is tightened to connect the connection surface between the male connector 1 and the female connector 4. The close fitting between 2a and 5a is maintained.

However, the lock type luer taper connector of the fifth embodiment is different from the conventional one in that the female screw 3a of the nut 3 of the male connector 1 is connected to the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4. For example, a stepped portion having a height lower than the thread of the female screw 3a, for example, as a lock portion that tightly engages with the protrusion 6 in a screwed state and gives resistance to the relative rotation between the nut 3 and the female connector 4. Two lock projections 7 are provided, and these lock projections 7 are integrated with them from the return side flank surface (the right side surface in FIG. 9A) of the female screw 3a of the nut 3 to the screw bottom surface. It protrudes and extends spirally from the back of the nut 3 to the middle part along the two female screws 3a. The reason why the lock protrusion 7 is not provided at the inlet of the nut 3 is that the screw protrusion between the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 is not hindered by the lock protrusion 7. It is for making it easy and reliable.

In the lock type luer taper connector of the fifth embodiment having such a configuration, the cylindrical connector 2 of the male connector 1 is inserted into the female connector 4 so that the luer taper connection surfaces 5a and 2a are closely fitted to each other. By doing so, an airtight connection of the connector is achieved. Further, a female thread 3a of a double thread of a nut 3 that is rotatably inserted into the base 2b of the cylindrical part 2 of the male connector 1 and is restricted from moving in the axial direction by engaging with the outer peripheral flange 2c of the base 2b, The fitting surfaces 5a and 2a of the male connector 1 and the female connector 4 are closely fitted to each other by tightening the nut 3 by screwing into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4. The match is maintained.

Here, of the female screw 3 a of the nut 3 and the protrusion 6 of the female connector 4, two lock projections 7 provided only on the female screw 3 a of the nut 3 are connected to the female screw 3 a of the nut 3 and the female connector 4. The protrusion 6 of the female connector 4 is pushed in the state of being screwed with the protrusion 6 and deformed elastically or elasto-plastically. Resist the rotation.

Therefore, according to the lock type luer taper connector and the male connector 1 of this embodiment, one of the nut 3 and the cylindrical portion 2 of the male connector 1 is held and fixed by hand and the other is twisted. Even if one of the female connector 4 and the male connector 1 is fixed or a twisting force is applied to the other connector or the nut 3, the male connector 1 is further fixed while the female connector 4 is fixed. Even if the nut 3 tries to rotate together with the male connector 1 due to a torsional force, the lock projection 7 gives resistance to the relative rotation between the nut 3 and the female connector 4, so that the nut 3 rotates relative to the female connector 4. Therefore, it is possible to prevent unintentional loosening or disengagement of the connector due to loosening of the screwed state of the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4.

Moreover, according to the lock type luer taper connector and the male connector 1 of this embodiment, the lock projection 7 gives resistance to the relative rotation between the nut 3 and the female connector 4 just by tightening the nut 3, so that the connector In order to prevent unintentional loosening and disconnection, the connection of the luer taper connector is not insufficient.

10 (a), (b) and (c) are nuts of one embodiment of the male connector of the first aspect of the present invention in the sixth embodiment of the lock-type luer taper connector of the first aspect of the present invention. FIG. 6 is a front view showing a configuration of the above and a longitudinal sectional view thereof and a longitudinal sectional view showing a connection state between a male connector having a nut and a normal female connector, in which the same parts as those in the fifth embodiment are the same as those shown in FIG. It shows with the code | symbol.

That is, in the lock-type luer taper connector of the sixth embodiment, the two lock projections 7 as the lock portions are different from the lock projection 7 in the previous embodiment, not the screw bottom but the thread top of the two female screws 3a. And projecting integrally with them on the surface and extending in an arcuate shape at the middle of the nut 3 along the two female threads 3a. 3 is different from the previous fifth embodiment only in that it has a slit 3b extending in the axial direction of 3, and the other points are configured similarly to the previous fifth embodiment. Detailed description is omitted here. The reason why the lock protrusion 7 is not provided at the inlet of the nut 3 is that the lock protrusion 7 prevents the threaded engagement of the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 as in the fifth embodiment. This is to make the screwing easy and reliable.

In the lock-type luer taper connector of the sixth embodiment having such a configuration, the tubular portion 2 of the male connector 1 is inserted into the female connector 4 so that the luer taper connection surfaces 5a and 2a are closely fitted to each other. By doing so, an airtight connection of the connector is achieved. Further, a female thread 3a of a double thread of a nut 3 that is rotatably inserted into the base 2b of the cylindrical part 2 of the male connector 1 and is restricted from moving in the axial direction by engaging with the outer peripheral flange 2c of the base 2b, The fitting surfaces 5a and 2a of the male connector 1 and the female connector 4 are closely fitted to each other by tightening the nut 3 by screwing into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4. The match is maintained.

Here, two lock projections 7 provided only on the female screw 3a of the nut 3 out of the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 are connected to the female screw 3a of the nut 3 and the female connector 4 respectively. The thread 6 and the tubular part 5 of the female connector 4 are pushed into the threaded state 6 and deformed elastically or elasto-plastically, and the nut 6 is in close contact with the projecting line 6 and the tubular part 5. 3 and the female connector 4 are provided with a resistance to relative rotation, and the portions of the nut 3 respectively located radially outward of the two lock projections 7 are elastically deformable radially outward. The nut 3 that has been screwed together is easily tightened.

Moreover, according to the lock type luer taper connector and the male connector 1 of this embodiment, the lock projection 7 gives resistance to the relative rotation between the nut 3 and the female connector 4 just by tightening the nut 3, so that the connector In order to prevent unintentional loosening and disconnection, the connection of the luer taper connector is not insufficient. Further, since the portion of the nut 3 pushed by the lock protrusion 7 is elastically deformed radially outward and escapes, the nut 3 screwed into the protrusion 6 can be easily tightened.

Furthermore, according to the lock-type luer taper connector of this embodiment, the lock protrusion 7 is provided only on the female screw 3a of the nut 3 of the male connector 1 instead of both the male connector 1 and the female connector 4. Since the conventional female connector 4 having a normal protrusion 6 is sufficient, the conventional female connector 4 is used to constitute the lock-type luer taper connector of the present invention, and the effects of the present invention can be achieved.

The first aspect of the present invention has been described above based on the illustrated examples. However, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims. For example, In the first to sixth embodiments of the first aspect, the lock protrusion 7 is provided on one of the female screw 3a of the nut 3 of the male connector 1 and the protrusion 6 of the tubular portion 5 of the female connector 4. However, the lock protrusions 7 may be provided on both of them.

Further, for example, in the first to sixth embodiments in the first aspect, the lock protrusion 7 is provided as the lock portion. In addition, the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 are provided. A lock recess may be provided that elastically and plastically engages with the lock protrusion 7 in the screwed state to give resistance to the relative rotation between the nut 3 and the female connector 4.

Further, in the first to sixth embodiments in the first aspect, the nut 3 is engaged with the outer peripheral flange 2c of the base 2b of the cylindrical portion 2, but the base 2b of the cylindrical portion 2 is connected to the connection surface 2a. If it is too thin, the nut 3 may be engaged with the stepped portion between the connecting surface 2a and the base 2b.

Further, in the first embodiment in the first aspect, the slit 5b is provided in the cylindrical portion 5, and in the sixth embodiment in the first aspect, the nut 3 is provided with the slit 3b. For example, the slit may be omitted, and in the second to fourth embodiments in the first aspect, the cylindrical portion 5 is not provided with a slit, and in the fifth embodiment, the nut 3 is not provided with a slit. As a modification of these embodiments, a slit may be provided.

Furthermore, in the first to sixth embodiments of the first aspect, the female connector 4 has two normal protrusions 6 at the tip of the cylindrical portion 5, but instead of these, a double thread screw is used. For example, about a half circumference may be provided at the tip of the cylindrical portion 5 with male threads as protrusions. In the first to sixth embodiments of the first aspect, the nut 3 and the female connector 4 have a double thread, but at least one of the nut and the female connector is appropriately screwed with the counterpart. If possible, it may have three or more threads.

11 (a) and 11 (b) show the configuration of the nut of the first embodiment of the male connector of the second aspect of the present invention in the first embodiment of the lock-type luer taper connector of the second aspect of the present invention. FIG. 11C is a longitudinal sectional view showing a connection state between a male connector having the nut and a normal female connector. In the figure, the same parts as in the conventional example are shown in FIG. It shows with the same code | symbol.

That is, the lock type luer taper connector of the first embodiment of the second aspect is also a plastic male having a cylindrical part 2 having a luer taper (6% taper) truncated conical connection surface 2a on the outer peripheral surface. The connector 1 and a plastic female connector 4 having a cylindrical portion 5 having a luer taper conical connecting surface 5a on the inner peripheral surface. The male connector 1 is also a cylinder of the male connector 1. A double threaded female screw having a hook portion 3e that is rotatably inserted into the small diameter portion 2b of the base portion of the shape portion 2 and whose axial movement is restricted by engagement with the outer peripheral flange 2c as the large diameter portion of the base portion. The female connector 4 has a plastic nut 3 having 3a, while the female connector 4 also projects integrally outward from the distal end of the tubular portion 5 of the female connector 4 in the radially outward direction. Two protrusions 6 as part of the male thread of the double thread extending in the direction are provided, and the female thread 3 a of the double thread of the nut 3 is connected to the two protrusions of the tip of the female connector 4. 6, and the nut 3 is tightened to maintain the close fitting between the connection surfaces 2 a and 5 a of the male connector 1 and the female connector 4.

However, the lock-type luer taper connector of the first embodiment is different from the conventional one, as shown in FIG. 11C, the male connector as the first embodiment of the male connector according to the second aspect of the present invention. The hook portion 3e of the nut 3 is loosely inserted into the small diameter portion 2a of the base portion of the cylindrical portion 2 of the male connector 1 with a sufficient clearance with respect to the small diameter portion 2a, and the outer periphery of the base portion The axial movement is restricted by the engagement with the flange 2c, and the engagement portion 3e of the nut 3 out of the engagement portion 3e of the nut 3 and the outer peripheral flange 2c of the base portion of the cylindrical portion 2 is the outer peripheral flange 2c of the engagement portion 3e. As shown in FIGS. 11 (a) and 11 (b), a radially semicircular annular ridge 3c as a friction torque reducing portion is provided at the radially inner end of the inner end face facing the As shown in FIG. 11C, the annular protrusion 3c In the engaged state between the engaging portion 3e of the nut 3 and the outer peripheral flange 2c of the base portion of the tubular portion 2, the inner surface in the radial direction of the engaging portion 3e where the torque radius from the rotation axis of the nut 3 is reduced on the end surface of the outer peripheral flange 2c. The frictional torque of relative rotation with the outer peripheral flange 2c of the base part of the cylindrical part 2 is reduced by sliding contact with a contact surface of a small area located at the end part.

In the lock-type luer taper connector and the male connector 1 of the first embodiment having such a configuration, the tubular portion 2 of the male connector 1 is inserted into the female connector 4, and the luer taper connection surfaces 5a and 2a are connected to each other. By tightly fitting the connectors, an airtight connection of the connector is achieved. Further, two nuts 3 having a hook portion 3e that is rotatably inserted into the small diameter portion 2b of the base portion of the cylindrical portion 2 of the male connector 1 and whose axial movement is restricted by the hooking with the outer peripheral flange 2c of the base portion. By screwing the female screw 3a of the screw into the two protrusions 6 at the tip of the cylindrical portion 5 of the female connector 4 and tightening the nut 3 into the female connector 4, the male connector 1 and the female connector 4 The close fitting of the connection surfaces 5a and 2a is maintained.

And here, the engaging portion 3e of the nut 3 is loosely inserted into the small-diameter portion 2a of the base portion of the cylindrical portion 2 of the male connector 1 and the friction torque that the engaging portion 3e of the nut 3 of the male connector 1 has. The annular ridge 3c as a reduction portion reduces the friction torque of the relative rotation between the tubular portion 2 and the engagement portion 3e of the nut 3 and the outer peripheral flange 2c of the base portion of the tubular portion 2.

Therefore, according to the lock type luer taper connector and the male connector 1 of this embodiment, even if the tubular portion 2 of the male connector 1 or the tube connected thereto is accidentally twisted with respect to the female connector 4, The engaging portion 3e of the nut 3 is loosely inserted into the small diameter portion 2a of the base portion of the cylindrical portion 2 of the male connector 1, and the annular protrusion 3c is connected to the engaging portion 3e of the nut 3 and the base portion of the cylindrical portion 2. Since the friction torque of the relative rotation with the outer peripheral flange 2c is reduced, the co-rotation between the cylindrical portion 2 of the male connector 1 and the nut 3 is prevented, so that the female screw 3a of the nut 3 and the female connector 4 It is possible to prevent unintentional loosening and disengagement of the connector due to loosening of the threaded state with the protrusion 6.

Moreover, according to the lock type luer taper connector of this embodiment and the male connector 1, the nut 3 loosely inserted into the small diameter portion 2 a of the base portion of the cylindrical portion 2 of the male connector 1 is simply tightened to the female connector 4. Since the engaging portion 3e and the annular protrusion 3c into which the nut 3 is loosely inserted prevent the cylindrical portion 2 of the male connector 1 and the nut 3 from rotating together, in order to prevent unintentional loosening and detachment of the connector. In addition, the connection of the luer taper connector is not insufficient, and the male connector 1 is not lengthened.

Furthermore, according to the lock type luer taper connector and the male connector 1 of this embodiment, the friction torque reducing portion is directed to the engaging portion 3e of the nut 3 and to the outer peripheral flange 2c of the base portion of the cylindrical portion 2 of the male connector 1. The cylindrical portion 2 of the male connector 1 is a conventional one as shown in FIG. 11C, and the female connector 4 is also shown in FIG. Since the conventional one is sufficient as shown in c), the lock type luer taper connector of the present invention can be constructed at low cost.

12 (a) and 12 (b) show the configuration of the nut of the second embodiment of the male connector of the second aspect of the present invention in the second embodiment of the lock-type luer taper connector of the second aspect of the present invention. FIG. 12 (c) is a longitudinal sectional view showing a connection state between a male connector having the nut and a normal female connector, in which the same parts as in the previous embodiment are shown. Is indicated by the same reference numeral.

That is, in the lock type luer taper connector of this embodiment and the male connector 1, the friction torque reducing portion is large on the stepped portion on the inner end surface of the engaging portion 3 e of the nut 3 and the large portion of the base portion of the cylindrical portion 2 of the male connector 1. Made of fluororesin as a low friction material, which is fitted and pasted toward the outer peripheral flange 2c as the diameter portion, and extends from the inner peripheral end of the inner end face of the engaging portion 3e of the nut 3 to the stepped portion. It differs from the previous first embodiment only in that it is constituted by the ring-shaped low friction sheet 3d, and the other points are the same as those in the first embodiment. Description is omitted.

According to the lock type luer taper connector and the male connector 1 of the second embodiment of the second aspect having such a configuration, as in the previous embodiment, an airtight connection of the connector is achieved, and the nut 3 By tightening, the close fitting of the connecting

surfaces

5a, 2a between the male connector 1 and the female connector 4 is maintained, and in addition, the tubular portion 2 of the male connector 1 or the tube connected thereto is mistakenly Even if the female connector 4 is twisted, the co-rotation of the cylindrical portion 2 of the male connector 1 and the nut 3 is prevented, so the female screw 3a of the nut 3 and the protrusion 6 of the female connector 4 It can prevent unintentional loosening and disengagement of the connector due to loose screwing, and inadequate connection of the luer taper connector or male connector to prevent unintentional loosening or disengagement of the connector. Not even the fact that 1 or longer.

Further, according to the lock type luer taper connector of the second embodiment and the male connector 1, the cylindrical portion 2 of the male connector 1 is a conventional one as shown in FIG. As shown in FIG. 12 (c), since the conventional one is sufficient, the lock type luer taper connector of the present invention can be constructed at low cost.

13 (a) and 13 (b) show the cylindrical portion of the third embodiment of the male connector of the second aspect of the present invention in the third embodiment of the lock-type luer taper connector of the second aspect of the present invention, and FIGS. Fig. 13 (c) is a longitudinal sectional view showing the configuration of the nut, and Fig. 13 (c) is a longitudinal sectional view showing a connection state between the male connector having the cylindrical portion and the nut and a normal female connector. Portions similar to those in the example are denoted by the same reference numerals.

That is, the lock-type luer taper connector of this embodiment and the male connector 1 have an outer peripheral flange 2c of the base portion of the cylindrical portion 2 out of the engaging portion 3e of the nut 3 and the outer peripheral flange 2c of the base portion of the cylindrical portion 2. As shown in FIG. 13A, an annular ridge 2d having a substantially semicircular cross section as a friction torque reducing portion is provided on the radially inner portion of the end face of the outer peripheral flange 2c facing the engaging portion 3e of the nut 3. Only in this point is different from the previous first embodiment, and the other points are configured in the same manner as in the previous first embodiment, so detailed description thereof will be omitted here.

Here, as shown in FIG. 13 (c), the annular ridge 2 d is inside the engagement portion 3 e of the nut 3 in the engagement state between the engagement portion 3 e of the nut 3 and the outer peripheral flange 2 c of the base portion of the cylindrical portion 2. The end surface is slidably contacted with a contact surface of a small area located in the radially inner portion of the outer peripheral flange 2c where the torque radius from the rotation axis of the nut 3 becomes small, and the relative rotation with the engaging portion 3e of the nut 3 is performed. Reduce friction torque.

According to the lock type luer taper connector and the male connector 1 of the third embodiment of the second aspect having such a configuration, as in the previous embodiment, an airtight connection of the connector is achieved, and the nut 3 By tightening, the close fitting of the connecting

surfaces

5a, 2a between the male connector 1 and the female connector 4 is maintained, and in addition, the tubular portion 2 of the male connector 1 or the tube connected thereto is mistakenly Even if the female connector 4 is twisted, the co-rotation between the cylindrical portion 2 of the male connector 1 and the nut 3 is prevented, so that the female screw 3b of the nut 3 and the protrusion 6 of the female connector 4 It can prevent unintentional loosening and disengagement of the connector due to loose screwing, and inadequate connection of the luer taper connector or male connector to prevent unintentional loosening or disengagement of the connector. Not even the fact that 1 or longer.

Further, according to the lock type luer taper connector of the third embodiment and the male connector 1, the nut 3 of the male connector 1 may be a conventional one as shown in FIG. Since the conventional one is sufficient as shown in FIG. 13 (c), the lock type luer taper connector of the present invention can be constructed at low cost.

The second aspect of the present invention has been described above based on the illustrated examples. However, the present invention is not limited to the above-described examples, and can be appropriately changed within the scope of the claims, for example, In the first to third embodiments of the second aspect, any of the outer peripheral flange 2c as the large diameter portion of the base portion of the tubular portion 2 of the male connector 1 and the engaging portion 3e of the nut 3 is used as the friction torque reducing portion. For example, a ring-shaped low friction sheet 3d as a friction torque reducing portion shown in FIG. 2 and an annular ridge 2d as a friction torque reducing portion shown in FIG. 3 are provided on both of them. Also good.

Further, in the first and third embodiments of the second aspect, the

annular ridges

3c and 2d are provided as the friction torque reducing portions, but instead, they are arranged at intervals in the circumferential direction. A plurality of protrusions and other protrusions may be provided.

Further, in the first to third embodiments of the second aspect, the engaging portion 3e of the nut 3 is engaged with the outer peripheral flange 2c of the base portion of the tubular portion 2, but the small diameter portion of the base portion of the tubular portion 2 is used. When 2b is thinner than the connection surface 2a, the engaging portion 3e of the nut 3 may be engaged with the step portion between the connection surface 2a and the small diameter portion 2b.

Furthermore, in the first to third embodiments of the second aspect, the female connector 4 has two normal protrusions 6 at the tip of the cylindrical portion 5, but instead of these, a double thread screw is used. For example, about a half circumference may be provided at the tip of the cylindrical portion 5 with male threads as protrusions. Moreover, in the said 1st thru | or 3rd Example, although the nut 3 and the female connector 4 have a double thread | screw, at least one of a nut and a female connector will be triple if an appropriate screwing with the other party is possible. You may have the above number of screws.

Thus, according to the lock-type luer taper connector of the first aspect of the present invention and the male connector and the female connector thereof, one of the nut and the male connector may be held by hand and the other may be twisted. Or, even if a torsional force is applied to the other connector or nut while one of the female connector and the male connector is fixed, a torsional force is applied to the male connector while the female connector is fixed. Even if it tries to rotate together with the male connector, the lock portion gives resistance to the relative rotation between the nut and the female connector, so the nut does not rotate with respect to the female connector. It is possible to prevent unintentional loosening and disconnection of the connector due to loosening of the screwed state of the female connector with the protrusion.

Moreover, according to the lock-type luer taper connector of the first aspect of the present invention and the male connector and the female connector, the lock portion provides resistance to relative rotation between the nut and the female connector simply by tightening the nut. In order to prevent unintentional loosening and disconnection of the connector, the connection of the luer taper connector is not insufficient.

In addition, according to the lock type luer taper connector of the second aspect of the present invention and the male connector, even if the tubular portion of the male connector or the tube connected thereto is accidentally twisted with respect to the female connector, The engaging part of the nut is rotatably inserted into the small diameter part of the base part of the cylindrical part of the male connector, and the friction torque reducing part is rotated relative to the engaging part of the nut and the large diameter part of the base part of the cylindrical part. Since the dynamic friction torque is reduced, it is possible to prevent the cylindrical portion of the male connector and the nut from rotating together. Therefore, the screwed state of the female screw of the nut and the protrusion of the female connector is loosened and the connector is not intended. It is possible to prevent loosening and detachment.

Moreover, according to the lock type luer taper connector of the second aspect of the present invention and the male connector, the nut loosely inserted into the small diameter portion of the base portion of the cylindrical portion of the male connector is simply tightened into the female connector. Due to the loose insertion state and the friction torque reduction part, the cylindrical part of the male connector and the nut are prevented from co-rotating, so the luer taper connector is insufficiently connected to prevent unintentional loosening and disengagement of the connector. There is no such thing as a long male connector.

DESCRIPTION OF SYMBOLS 1 Male connector 2 Cylindrical part 2a Connection surface 2b Small diameter part 2c Outer peripheral flange 2d Annular protrusion 3 Nut 3a Female screw 3b Slit 3c Annular protrusion 3d Low friction sheet 3e Engagement part 4 Female connector 5 Tubular part 5a Connection surface 5b Slit 6 Projection 7 Lock projection

Claims

A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector has a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the base portion and has a female screw,
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. For luer taper connectors,
At least one of the female screw of the nut and the protrusion of the female connector is engaged closely or closely with the other in a screwed state of the female screw of the nut and the protrusion of the female connector, and the nut and the female connector A lock-type luer taper connector, characterized by having a lock portion that provides resistance to relative rotation with the connector.
The lock type luer taper connector according to claim 1, wherein the lock portion is provided only on the protrusion of the female connector.
The lock type luer taper connector according to claim 1, wherein the lock portion is provided only on the female thread of the nut.
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector has a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the base portion and has a female screw,
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. In the male connector of the luer taper connector,
The female screw of the nut engages closely or closely with the protrusion of the female connector in a screwed state between the female screw of the nut and the protrusion of the female connector, and the nut and the female connector rotate relative to each other. The male connector of the lock type luer taper connector according to claim 1, further comprising a lock portion that provides resistance to the cable.
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector has a nut that is rotatably inserted into the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the base portion and has a female screw,
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. In the female connector of the luer taper connector,
The protrusion of the female connector is engaged with the female screw of the nut in a state where the protrusion of the female connector and the female screw of the nut are engaged with each other, and the relative rotation between the nut and the female connector is performed. The female connector of the lock type luer taper connector according to claim 1, further comprising a lock portion that provides resistance to the cable.
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector is a nut having a female screw with a hook portion that is rotatably inserted into a small diameter portion of the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the large diameter portion of the base portion. Have
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. For luer taper connectors,
The hook engaging portion of the nut is rotatably inserted into the small diameter portion of the base portion of the cylindrical portion of the male connector, and the axial movement is restricted by the engagement with the large diameter portion of the base portion,
In the male connector, at least one of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion is the other in the engaged state of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion. A lock-type luer taper connector comprising a friction torque reducing portion for reducing the friction torque of the relative rotation.
The lock type according to claim 6, wherein the friction torque reducing portion has a protrusion protruding toward a large diameter portion of a base portion of the cylindrical portion of the male connector at the engaging portion of the nut. Luer taper connector.
The lock according to claim 6, wherein the friction torque reducing portion includes a low friction material provided at a hook portion of the nut toward a large diameter portion of a base portion of the cylindrical portion of the male connector. Type luer taper connector.
The lock type luer taper connector according to claim 6, wherein the friction torque reducing portion has a protrusion protruding toward a hooking portion of the nut at a large diameter portion of a base portion of the cylindrical portion. .
A male connector having a cylindrical portion with a luer tapered truncated conical connection surface on the outer peripheral surface;
A female connector having a cylindrical portion having a luer tapered truncated conical connection surface on the inner peripheral surface;
The male connector is a nut having a female screw with a hook portion that is rotatably inserted into a small diameter portion of the base portion of the cylindrical portion of the male connector and whose axial movement is restricted by engagement with the large diameter portion of the base portion. Have
The female connector has a protrusion that protrudes radially outward from the distal end of the tubular portion of the female connector,
A lock type in which the female screw of the nut is screwed into the protrusion at the tip of the female connector and the nut is tightened to maintain the fitting between the connection surfaces of the male connector and the female connector. In the male connector of the luer taper connector,
The hook portion of the nut is rotatably inserted into the small diameter portion of the base portion of the cylindrical portion, and the axial movement is restricted by the engagement with the large diameter portion of the base portion,
At least one of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion is relatively rotated with the other in the engaged state of the engaging portion of the nut and the large diameter portion of the base portion of the cylindrical portion. The male connector of the lock type luer taper connector according to claim 6, further comprising a friction torque reducing portion for reducing the friction torque.