JP2019050899A - Male/female connector connection mechanism - Google Patents

Abstract

To provide a male/female connector connection mechanism in a novel configuration for solving problems due to excessive fastening of a lock ring.SOLUTION: A male connector 10 comprises: a stopper part 14 for regulating movement of a lock ring 30 to a female connector 20 side; and a knurl 18 which is formed at a position opposite to the female connector 20 side, relative to the stopper part 14. The lock ring 30 has a stopper part 14 of the male connector 10, and a knurl 38 which engages to the knurl 18. Before the knurl 38 of the lock ring 30 reaches a position where it comes into contact with the stopper part 14 of the male connector 10, engagement of the knurls 18, 38 is established for completion of lock.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a male / female connector connection mechanism used for a connection part such as a tube / part constituting a blood circuit, and more specifically to prevent over tightening of a lock ring used in the male / female connector connection mechanism and tightening strength. The present invention relates to a technique for easily experiencing the senses of the above.

  Conventionally, as disclosed in, for example, Patent Document 1, a male connector is attached to the tip of a tube that is used in the middle of a blood circuit or the like and configures the circuit, and this male connector is connected to a connection target such as a female connector. Then, a male-female connector connection mechanism for fixing with a screw-type lock ring is known.

  In this Patent Document 1, it is an object to prevent the locking ring from loosening. The male connector side engaging protrusion on the male connector side and the locking ring side engaging protrusion on the lock ring side are engaged with each other to engage the both protrusions. A configuration is disclosed in which loosening of the tightened lock ring is prevented by generating resistance by matching.

Japanese Patent No. 5075531

  The function of preventing loosening as disclosed in Patent Document 1 is an important function from the viewpoint of preventing air contamination and blood outflow.

  On the other hand, it has been found that there is a new problem in the male-female connector connection mechanism while the function of preventing the lock ring from loosening is required.

  This is a harmful effect that the luer taper portions of the male and female connectors are excessively meshed with each other by excessively tightening the lock ring, and the male connector cannot be pulled out from the female connector. For example, when the patient's body changes suddenly or in an emergency such as a disaster such as an earthquake or fire, the connector connection may need to be released immediately. On the other hand, if sufficient tightening is avoided to fear this problem, the connection may be easily disconnected.

  As described above, the present invention finds the above problems and proposes a male-female connector connection mechanism having a novel configuration for solving the problems.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is,
A male and female connector connection mechanism having a male connector movably provided with a lock ring, and a female connector,
In the state where the connection insertion portion of the male connector is taper-fitted to the connection opening of the female connector, the lock ring is screwed into the female connector to prevent the male connector from coming off,
In the male connector,
A stopper portion for restricting movement of the lock ring toward the female connector;
An engagement portion formed at a position opposite to the female connector side with respect to the stopper portion; and
The lock ring includes
The stopper portion of the male connector, and an engaged portion that engages with the engaging portion are provided,
In the process of the screw ring being advanced,
Before the engaged portion of the lock ring reaches a contact position where it comes into contact with the stopper portion of the male connector,
The configuration is such that the locking is completed when the engagement between the engaging portion / engaged portion is established.
A male-female connector connection mechanism.

Also preferably,
In the process of the screw ring being advanced,
The position of the lock ring where engagement between the engagement portion / engaged portion is started is a lock start position,
The position of the lock ring when further twisted from the lock start position is a lock completion position,
The position of the lock ring when the engaged portion of the lock ring comes into contact with the stopper portion is defined as a stopper reaching position.
In all the processes from the lock start position through the lock completion position to the stopper reaching position, the engagement portion / engaged portion is engaged with each other.

Also preferably,
The engaged portion of the lock ring and / or the engaging portion of the male connector is configured by a long protrusion in the moving direction of the lock ring.

Also preferably,
A male connector configured to be taper-fitted to a female connector and maintain a taper-fitting to the female connector by a lock ring,
A stopper portion for restricting movement of the lock ring toward the female connector;
An engagement portion formed at a position opposite to the female connector side with respect to the stopper portion; and
The engaging portion is engaged with an engaged portion provided on the lock ring side.

Also preferably,
The lock ring is slidably integrated with the male connector.

Also preferably,
A lock ring for preventing a male connector and a female connector that are tapered to each other from coming off,
The lock ring is provided with an engaged portion for engaging with an engaging portion provided on the male connector side.

  As effects of the present invention, the following effects can be obtained.

That is, according to the configuration of the present invention,
When the lock is started, it can give the operator a “click” feeling, and can tell the operator that the lock ring can be screwed in at that time. The male connector and the female connector can be fitted to the optimum position, and the occurrence of an event that the male connector and the female connector are not detached can be prevented.

The figure explaining the structural member of a male-female connector connection mechanism. The figure explaining the state at the time of a connection completion. FIG. 2 is a schematic cross-sectional view of the lock ring and the like of FIG. (A) is a perspective view of a lock ring. (B) is a perspective view of a lock ring. (A) is a figure explaining before lock start. (B) is a figure shown about a lock start position. (C) is a figure shown about a lock completion position. (D) is a figure showing a stopper reaching position. (A) is a figure explaining the shape of a knurl. (B) is a diagram illustrating the meshing between knurls. (A) is a figure explaining the example of arrangement | positioning of a knurl. (B) is a diagram illustrating the meshing between knurls.

Hereinafter, the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to the specific examples described below.
FIGS. 1 and 2 show an embodiment of the connector connection structure of the present invention. In the following description, for convenience, in FIG. 1, the left side of the page is the left side / rear end and the right side is the right side / front end. .

  As shown in FIG. 1 and FIG. 2, the male / female connector connection mechanism of the present invention includes a male connector 10, a female connector 20, and a lock ring 30.

  The male connector 10 includes a cylindrical shaft portion 11, a knob portion 12 that is provided on the rear end side of the cylindrical shaft portion 11 and has a larger diameter than the cylindrical shaft portion 11, and a connection insertion portion 13 that is provided on the front end side of the cylindrical shaft portion 11. And is configured.

  The tube 1 constituting the blood circuit is connected to the knob portion 12 side of the cylindrical shaft portion 11. The tube 1 is fixed to the knob portion 12 by adhesion or the like.

  A stopper portion 14 having a diameter larger than that of the cylindrical shaft portion 11 is formed at a position between the knob portion 12 and the connection insertion portion 13 in the cylindrical shaft portion 11. A lock ring 30 is provided between the stopper portion 14 and the knob portion 12 so as to be movable in the axial direction of the cylindrical shaft portion 11. Since the lock ring 30 abuts against the stopper portion 14 and the knob portion 12, the movement is limited between the stopper portion 14 and the knob portion 12, thereby preventing the lock ring 30 from falling off the male connector 10. The ring 30 and the male connector 10 are handled integrally.

  The configuration of each part will be described. The cylindrical shaft portion 11, the grip portion 12, the connection insertion portion (male luer taper portion) 13 and the stopper portion 14 are configured as one member. Further, the lock ring 30 is integrated with the male connector 10 by press-fitting the connection insertion portion (male luer taper) 13 from the rear end side of the lock ring 30 and moving the lock ring 30 to the site of the cylindrical shaft portion 11. To the state. The tube 1 is bonded to the rear end of the grip portion 12. As described above, the lock ring 30 and the male connector 10 (with the tube 1) are integrated.

  The female connector 20 has a cylindrical shaft portion 21, a connection opening 23 is provided on the rear end side, and the tube 2 constituting the blood circuit is connected on the front end side. The tube 2 is fixed to the cylindrical shaft portion 21 by adhesion or the like. The tube shaft portion 21 is formed with a protrusion 25 for picking with a finger so that the female connector 20 side does not rotate when the lock ring 30 is fastened / released.

  The connection insertion portion 13 of the male connector 10 is inserted into the connection opening 23 of the female connector 20. The outer diameter of the connection insertion portion 13 of the male connector 10 has a tapered shape that decreases toward the tip, and is tapered to the connection opening 23 of the female connector 20.

  An outer screw portion 26 is formed on the outer periphery of the rear end portion of the female connector 20 so as to be screwed with the inner screw portion 36 of the lock ring 30. While the male connector 10 is fitted to the female connector 20 and the lock ring 30 is moved to the female connector 20 side and rotated, the outer screw portion 26 enters the inner screw portion 36 of the lock ring 30. The lock ring 30 moves to the female connector 20 side.

  As described above, the male connector 10 and the female connector 20 that are taper-fitted are fixed by the lock ring 30, and the male connector 10 and the female connector 20 are prevented from being disconnected from each other by the lock ring 30. Is done.

  As shown in FIGS. 3 and 4 (A) and 4 (B), the lock ring 30 is formed of a cylindrical member, and a protruding portion 37 for facilitating the rotation operation is provided on the outer peripheral surface thereof. Is provided. In addition, the protrusion part 17 similar to this protrusion part 37 is also formed in the knob | pick part 12 of the male connector 10 (FIG. 1).

  As shown in FIGS. 3 and 4A and 4B, an inner thread portion 36 is formed on the inner peripheral surface of the cylindrical lock ring 30 on the front end side near the female connector 20, and this inner thread. The external screw portion 26 of the female connector 20 is screwed to the portion 36.

  Further, on the inner peripheral surface of the lock ring 30, knurls 38 projecting inward are provided at a plurality of locations at intervals in the circumferential direction on the rear end side that is far from the female connector 20. In this embodiment, as shown in FIG. 6A, knurls 38 are formed at intervals of 45 degrees at a total of eight locations.

  On the other hand, as shown in FIG. 3, in the cylindrical shaft portion 11 of the male connector 10, knurls 18 projecting outward are located at a plurality of positions at intervals in the circumferential direction at positions behind the stopper portion 14. Is provided. A space 19 is formed between the knurls 18. In the present embodiment, the knurl 18 is constituted by a protrusion that is long in the axial direction. In addition, as shown in FIG. 6A, knurls 18 are formed in a total of eight locations, and the arrangement is such that the arrangement of four knurls 18 spaced 30 degrees apart is point-symmetric with respect to the axis center. The configuration is as follows.

  The arrangement of the knurls 18 and 38 shown in FIGS. 6A and 6B described above is merely an example. In addition to this, for example, the arrangement shown in FIGS. 7A and 7B may be used. Good. In other words, the knurls 38 are provided over the entire circumference in the circumferential direction, or the number of knurls 18 and 38 is in a 1: 2 relationship. Further, for example, the ratio of the axial length 38L of the projecting knurl 38 to the axial length 18L of the projecting knurl 18 may be set to 0.44: 1.9. it can. The shape of the knurls 18 and 38 is not limited to the shape of the embodiment, and any shape may be used as long as the engagement / disengagement is performed when the lock ring 30 rotates.

  In the above configuration, as shown in FIG. 3, when the lock ring 30 is tightened by pressing the connection insertion portion 13 of the male connector 10 into the connection opening 23 of the female connector 20 to establish a taper fitting, First, as shown in FIG. 5A, the outer screw portion 26 of the female connector 20 enters the inner screw portion 36.

  Then, as it further progresses, as shown in FIG. 5 (B), the knurls 38 of the lock ring 30 begin to contact the knurls 18 of the male connector 10, and as shown in FIG. They become engaged with each other. In this way, when the engagement between the knurls is established, the rotation of the lock ring 30 is once restricted and it becomes difficult to rotate, so that the operator operating the lock ring 30 instantaneously reaches the lock start position by the lock ring 30. You can recognize that you have reached it. That is, the lock is started in the state of FIG.

  From this stage, when the lock ring 30 is further rotated and advanced, the knurl 38 of the lock ring 30 gets over the knurl 18 of the male connector 10 and enters the groove 19 after getting over. That is, tightening by the lock ring 30 proceeds while repeating the engagement and release of the knurls 18 and 38. By such engagement between the knurls 18 and 38 and the release thereof, it is possible to give the operator a feeling of “click”.

FIG. 5C shows a state where the lock completion state has been reached.
In this embodiment, the intermediate position A of the knurl 18 in the axial direction is set as an ideal lock completion position. With such a setting, it is possible to operate in such a manner that the above-mentioned operation of “clicking”, “clicking” is completed when the lock is completed, that is, the operation where the completion point is the optimum position of the male connector and the female connector is possible. Become.

  Here, it is difficult for the operator to accurately grasp the “number of times” of the operation feeling “click”, and the management thereof is also difficult. Therefore, for example, by setting the intermediate position A of the knurling 38 as an ideal lock completion position, the operator can complete the work easily and reliably. The intermediate position A of the knurl 38 can be, for example, an intermediate position in the longitudinal direction of the cylindrical shaft portion 11 in a range of a section that functions as the knurl 38 (an operation feeling “click” is generated). .

  Further, even when the rotation of the lock ring 30 is stopped from the position of FIG. 5 (B) to the state of FIG. 5 (C), the knurling 18 and 38 are engaged with each other to engage the lock ring 30. Loosening is prevented and the function of the lock ring 30 can be achieved.

  If the lock ring 30 exceeds the intermediate position A in FIG. 5C and reaches the restriction position in FIG. 5D, the knurl 38 of the lock ring 30 reaches the stopper portion 14 of the male connector 10. To do. When the lock ring 30 is further rotated from this state, the lock ring 30 attracts the external thread portion 26 of the female connector 20, and the taper portions (connecting insertion portion 13, connecting opening portion 23) of the male and female connectors engage with each other excessively firmly. Thus, the male connector 10 cannot be pulled out from the female connector 20.

  However, until the stopper reaching position in FIG. 5D is reached, an operation feeling “click” is repeatedly generated, so that such a state can be reliably prevented from occurring. . By making the length of the knurl 18 of the male connector 10 longer, it is possible to more reliably prevent the state of FIG.

  In the above embodiment, the knurl 18 on the male connector 10 side is lengthened. However, the short knurl 18 is arranged at a position away from the stopper portion 14 and the knurl 38 on the lock ring 30 side. It is good also as a structure which lengthens.

The present invention can be implemented as described above.
That is, as shown in FIGS.
A male-female connector connection mechanism having a male connector 10 movably provided with a lock ring 30 and a female connector 20,
In a state where the connection insertion portion 13 of the male connector 10 is taper-fitted to the connection opening 23 of the female connector 20, the lock ring 30 is screwed into the female connector 20 to prevent the male connector 10 from coming off.
The male connector 10 includes
A stopper portion 14 for restricting movement of the lock ring 30 toward the female connector 20;
A knurling 18 as an engaging portion formed at a position opposite to the female connector 20 side than the stopper portion 14 is provided,
Lock ring 30 includes
A knurling 38 as an engaged portion that engages with the stopper portion 14 of the male connector 10 and the knurling 18 is provided,
In the process of the screw ring 30 being advanced,
Before the knurl 38 of the lock ring 30 reaches the abutting position where it abuts against the stopper portion 14 of the male connector 10,
The configuration is such that the lock is completed when the engagement between the knurls 18 and 38 is established.
It is something to do.

  With this configuration, it is possible to give the operator a “click” feeling when the lock is started, and to inform the operator that the lock ring can be screwed in at that time. In addition, the male connector and the female connector can be fitted to the optimum position, and the occurrence of an event that the male connector and the female connector are not detached can be prevented.

Further, as shown in FIGS. 5 (A) to (D),
In the process of the screw ring 30 being advanced,
The position of the lock ring 30 where the engagement between the knurls 18 and 38 is started is defined as a lock start position.
The position of the lock ring 30 when further twisted from the lock start position is the lock completion position,
The position of the lock ring 30 when the knurl 38 of the lock ring 30 comes into contact with the stopper portion 14 is defined as a stopper reaching position.
In all the processes from the lock start position through the lock completion position to the stopper reaching position, the knurls 18 and 38 are engaged with each other.
It is something to do.

  With this configuration, the locking can be completed even if the locking of the lock ring 30 is stopped at any position from the locking start position to the stopper reaching position, and how much should be screwed into the operator? Since it is possible to reliably complete the work without forcing attention such as, it is possible to reduce the burden on the operator. In addition, any operator can achieve the same locked state, and the possibility of problems of looseness and overtightening can be minimized. Furthermore, since the rotational torque (operating force) required for unlocking can be made uniform, for example, even when the operator to be locked is different from the operator to be unlocked, the operator to unlock is easy. The release operation can be performed.

Further, the knurl 38 of the lock ring 30 and / or the knurl 18 of the male connector 10 is configured by a long protrusion in the moving direction of the lock ring 30.
It is something to do.

  As a result, an operation feeling such as “click” can be continuously generated without interruption.

The male connector 10 is configured to be taper-fitted to the female connector 20 and maintain the taper-fitting to the female connector 20 by the lock ring 30;
A stopper portion 14 for restricting movement of the lock ring 30 toward the female connector 20;
A knurling 18 formed at a position opposite to the female connector 20 side with respect to the stopper portion 14 is provided,
The knurl 18 is engaged with a knurl 38 provided on the lock ring 30 side.

  Further, the lock ring 30 is provided integrally with the male connector 10 so as to be slidable.

Also, a lock ring 30 for preventing the male connector 10 and the female connector 20 that are taper-fitted to each other,
The lock ring 30 is provided with a knurling 38 for engaging with the knurling 18 provided on the male connector 10 side.

DESCRIPTION OF SYMBOLS 1 Tube 2 Tube 10 Male connector 11 Cylinder shaft part 12 Knob part 13 Connection insertion part 14 Stopper part 18 Knurl 19 Groove part 20 Female connector 21 Cylinder shaft part 23 Connection opening part 25 Projection part 26 External screw part 30 Lock ring 36 Inner screw part 37 ridge 38 knurl

Claims (6)

A male and female connector connection mechanism having a male connector movably provided with a lock ring, and a female connector,
In the state where the connection insertion portion of the male connector is taper-fitted to the connection opening of the female connector, the lock ring is screwed into the female connector to prevent the male connector from coming off,
In the male connector,
A stopper portion for restricting movement of the lock ring toward the female connector;
An engagement portion formed at a position opposite to the female connector side with respect to the stopper portion; and
The lock ring includes
The stopper portion of the male connector, and an engaged portion that engages with the engaging portion are provided,
In the process of the screw ring being advanced,
Before the engaged portion of the lock ring reaches a contact position where it comes into contact with the stopper portion of the male connector,
The configuration is such that the locking is completed when the engagement between the engaging portion / engaged portion is established.
Male female connector connection mechanism. In the process of the screw ring being advanced,
The position of the lock ring where engagement between the engagement portion / engaged portion is started is a lock start position,
The position of the lock ring when further twisted from the lock start position is a lock completion position,
The position of the lock ring when the engaged portion of the lock ring comes into contact with the stopper portion is defined as a stopper reaching position.
In all the processes from the lock start position through the lock completion position to the stopper reaching position, the engagement portion / engaged portion is engaged with each other.
The male-female connector connection mechanism of Claim 1 characterized by the above-mentioned. The engaged portion of the lock ring and / or the engagement portion of the male connector is configured with a long protrusion in the moving direction of the lock ring.
The male-female connector connection mechanism according to claim 1, wherein the male-female connector connection mechanism is provided. A male connector configured to be taper-fitted to a female connector and maintain a taper-fitting to the female connector by a lock ring,
A stopper portion for restricting movement of the lock ring toward the female connector;
An engagement portion formed at a position opposite to the female connector side with respect to the stopper portion; and
The said engaging part is a male connector which shall engage with the to-be-engaged part provided in the lock ring side. The lock ring is slidably integrated with the male connector,
The male connector according to claim 4. A lock ring for preventing a male connector and a female connector that are tapered to each other from coming off,
The lock ring is provided with an engaged portion for engaging with an engaging portion provided on the male connector side.
A lock ring characterized by that.

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