JP2017056120A - Lock type connecting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock type connecting tool capable of reliably preventing loosening of screwing by lock means.SOLUTION: The lock type connecting tool includes: a male connector 10 including a connecting insertion part 11 formed at a tip part; a female connector 14 which includes a fitting part 14c that is fittable thereto by causing the connecting insertion part 11 to insert therein, is connected to the male connector 10 by fitting of the connecting insertion part 11 to the fitting part 14c to cause liquid to distribute, and has a male screw part 14b formed on the outer peripheral surface; and lock means 12 which is attached to the male connector 10, and includes a female screw part 12a that is screwable with the male screw part 14b, formed on the inner peripheral surface. The lock type connecting tool further includes a helical spring 13 for energizing always the lock means 12 in an opposite direction of a direction to that the screwing is loosened under a state that the female screw part 12a of the lock means 12 is screwed with the male screw part 14b.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a lock-type connector provided with locking means for locking the connection state between a male connector and a female connector.

  A blood circuit for circulating a patient's blood extracorporeally at the time of blood purification treatment is usually composed of an arterial blood circuit and a venous blood circuit made of a flexible tube. A blood purifier (dialyzer or the like) for purifying extracorporeal blood is connected to each proximal end of the circuit, and an arterial puncture needle and a venous puncture that can be punctured by a patient are connected to each distal end. A needle is attached.

  Locking connectors called shunt connectors are formed at the tips of the arterial blood circuit and the venous blood circuit, respectively. For example, a tube extending from the arterial puncture needle and the venous puncture needle and the arterial side are provided. The distal end of the tube constituting the blood circuit and the venous blood circuit can be connected by the lock-type connector. A conventional locking connector is connected to a male connector connected to the distal ends of tubes constituting the arterial blood circuit and the venous blood circuit, and a tube extending from the arterial puncture needle and the venous puncture needle. A female connector is included, and a male connector is fitted to the female connector for connection, and a lock ring that locks a connection state between the male connector and the female connector.

  More specifically, the lock ring (locking means) is attached to the male connector, and a female screw portion that can be screwed with a male screw portion formed on the outer peripheral surface of the female connector is formed on the inner peripheral surface. In addition, the connection state between the male connector and the female connector is locked by screwing the female screw portion into the male screw portion (see, for example, Patent Document 1). As a result, the arterial puncture needle and the venous puncture needle can be connected to the tips of the arterial blood circuit and the venous blood circuit, respectively.

Utility Model Registration No. 3137386

  However, in the above-described conventional locking connector, an excessive load is applied, for example, the connected blood circuit is pulled in a state where the screwing of the female screw portion of the locking means and the male screw portion of the female connector is loosened. If applied, the connection between the male connector and the female connector may be disconnected. In addition, although the male connector and the female connector are well fitted and the connection is securely performed, the locking means may be loosened, and in this case, the connection is securely performed. There is a risk of anxiety for medical staff and patients.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a lock-type connector that can reliably prevent loosening of the screwing by the lock means.

  According to the first aspect of the present invention, a tube capable of circulating a liquid is connected to the base end portion, and a male connector having a connection insertion portion formed at the distal end portion can be inserted into the connection insertion portion to be fitted. A female connector having a fitting portion, connected to the male connector by fitting of the connection insertion portion with respect to the fitting portion and being able to circulate liquid, and having a male screw portion formed on the outer peripheral surface; A female screw portion that can be screwed to the male screw portion is formed on the inner peripheral surface of the male connector and the female connector between the male connector and the female connector by screwing the female screw portion to the male screw portion. And a locking means for locking the connection state, wherein the locking means is always placed in a direction opposite to the loosening direction in a state where the female screw portion of the locking means is screwed to the male screw portion. With Characterized by comprising biasing means for.

  According to a second aspect of the present invention, in the locking connector according to the first aspect, the male connector is formed with a locking portion capable of locking the locking means with the connection insertion portion facing outside. In addition, when the connection insertion portion is fitted to the fitting portion of the female connector, the locking portion is released from the locking portion and the locking portion can be locked. .

  According to a third aspect of the present invention, in the locking connection tool according to the first or second aspect, the urging means comprises a coil spring.

  According to a fourth aspect of the present invention, in the locking connector according to the third aspect, the shaft portion of the male connector is inserted and assembled into the coil spring.

  The invention according to claim 5 is the locking connector according to any one of claims 1 to 3, further comprising a cover portion that covers a connection portion of the male connector and the female connector, and the cover portion includes the cover portion. A biasing means is attached.

  A sixth aspect of the present invention is the locking connector according to the fifth aspect, wherein the cover portion has an arm portion for transmitting the urging force of the urging means to the locking means.

  A seventh aspect of the present invention is a medical liquid flow path comprising the lock-type connector according to any one of the first to sixth aspects.

  According to the first aspect of the present invention, there is provided a biasing means for constantly biasing the locking means in a direction opposite to the direction in which the screwing is loosened in a state where the female threaded portion of the locking means is screwed into the male threaded portion. Therefore, it is possible to reliably prevent loosening of the screwing by the lock means.

  According to the invention of claim 2, the male connector is formed with a locking portion capable of locking the locking means with the connection insertion portion facing outside, and the connection insertion portion is fitted to the female connector. Since the locking means is unlocked by the locking portion and can be locked by the locking means when fitted to the portion, the connection insertion portion can be more smoothly and reliably fitted to the fitting portion. The workability at the time of connection between the male connector and the female connector can be further improved.

  According to the invention of claim 3, since the urging means is composed of a coil spring, a lock-type connector having a simple configuration can be realized.

  According to the invention of claim 4, since the shaft portion of the male connector is inserted into the coil spring used as the urging means, the connecting portion between the male connector and the female connector is reliably prevented from loosening by the locking means. Can be prevented from being increased in size by the urging means, and the locking connector can be made compact.

  According to the invention of claim 5, since the cover portion covering the connection portion of the male connector and the female connector is provided, and the biasing means is attached to the cover portion, it is possible to reliably prevent loosening of the screwing by the lock means. However, the connection part of the male connector and the female connector can be protected by the cover part.

  According to the invention of claim 6, since the cover portion has the arm portion for transmitting the urging force of the urging means to the lock means, the arrangement position of the urging means with respect to the cover portion can be arbitrarily set. In addition, the loosening of the screwing by the locking means can be prevented more reliably.

  According to the invention of claim 7, it is possible to provide a medical liquid flow path that can reliably prevent loosening of the screwing by the locking means.

The schematic diagram which shows the blood circuit to which the lock-type connector which concerns on embodiment of this invention is applied. The perspective view which shows the lock-type connector (before connection) which concerns on 1st Embodiment of this invention. It is a figure which shows the male connector in the lock type connection tool, (a) Side view (b) Sectional drawing It is a figure which shows the female connector in the lock type connection tool, (a) Side view (b) Sectional drawing (A) Side view (b) Cross-sectional view showing the lock-type connector (after connection and before locking) (A) Side view (b) Cross-sectional view showing the lock-type connector (after connection and after locking) The perspective view which shows the lock-type connector (before connection) which concerns on 2nd Embodiment of this invention. It is a figure which shows the male connector in the lock type connection tool, (a) Side view (b) Sectional drawing The perspective view which shows the lock type connector (state after a connection and before a lock | rock) (A) side view (b) cross-sectional view of the lock-type connector (after connection and before locking) The perspective view which shows the lock type connector (state after a connection and a lock | rock) (A) side view (b) cross-sectional view of the lock-type connector (after connection and after locking) The perspective view which shows the lock-type connector which concerns on 3rd Embodiment of this invention. Side view showing male connector and female connector (state before connection) in the locking connector (A) plan view, (b) side view, (c) bottom view showing the lock type connector XVI-XVI line sectional view in FIG. The perspective view which shows the cover part in the lock type connection tool (A) plan view, (b) side view, (c) bottom view showing the cover part XIX-XIX line sectional view in FIG.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The lock-type connector according to the present embodiment is applied to a blood circuit having an arterial blood circuit 1 and a venous blood circuit 2 as shown in FIG. Such a blood circuit circulates the patient's blood extracorporeally for artificial dialysis treatment, and performs blood purification or the like in the middle thereof. As shown in the figure, the arterial side having an arterial puncture needle a connected to the tip is provided. It is mainly composed of a blood circuit 1 and a venous blood circuit 2 having a venous puncture needle b connected to the tip.

  The proximal ends of the arterial blood circuit 1 and the venous blood circuit 2 are connected to a dialyzer 3 as a blood purifier, and a blood flow path is formed in the blood. The dialyzer 3 is connected to a dialysate introduction line L1 and a dialysate discharge line L2, respectively, and a flow path through which the dialysate can flow is formed. When blood circulating outside the body passes through the blood flow path and the dialysate passes through the dialysate flow path, unnecessary substances (spent waste) in the blood can be removed by dialysis to the dialysate side.

  In the middle of the arterial blood circuit 1, an ironing type blood pump 4 for driving while squeezing a tube constituting the flow path of the arterial blood circuit 1 is disposed, and in the middle of the venous blood circuit 2. The air trap chamber 5 for defoaming is connected, and is configured to remove the air in the blood generated during the extracorporeal circulation process and return the blood to the patient's body. In addition, a T-shaped tube or a rubber button (not shown) is connected in the middle of the arterial blood circuit 1 and the venous blood circuit 2 so that blood collection, drug administration, etc. can be performed while performing dialysis treatment. .

  The arterial blood circuit 1 and the venous blood circuit 2 are each made of a flexible tube, and constitute a “medical liquid flow path” through which the patient's blood, priming liquid, and the like can be circulated. Further, the distal ends of the arterial blood circuit 1 and the venous blood circuit 2 are a tube 6 extending from the arterial puncture needle a and a tube extending from the venous puncture needle b via the locking connectors 8 and 9, respectively. 7 are connected to each other. Thereby, the blood of the patient collected from the arterial puncture needle a circulates through the tube 6 and the arterial blood circuit 1, and after blood purification is performed by the dialyzer 3, circulates through the venous blood circuit 2 and the tube 7. Then, it is returned to the patient via the venous puncture needle b.

  The lock type connector (8, 9) according to the first embodiment of the present invention connects the tube (6, 7) and the arterial blood circuit 1 or the venous blood circuit 2 so as to communicate the respective flow paths. As shown in FIGS. 2 to 6, it is mainly composed of a male connector 10, a female connector 14, a lock means 12, and a coil spring 13 as an urging means. In addition, in order to avoid duplication of description, the lock-type connector 8 that connects the artery-side blood circuit 1 and the tube 6 will be described in detail below, but the lock-type connection that connects the vein-side blood circuit 2 and the tube 7. The tool 9 has the same configuration.

  As shown in FIGS. 2 and 3, the male connector 10 is connected to a tube (a flexible tube constituting the arterial blood circuit 1 in the present embodiment) that can circulate a liquid to the proximal end portion 10a. It is made of a resin (hard resin) part having a connection insertion part 11 formed at the tip. The male connector 10 has a through hole formed in the axial direction, and the through hole constitutes a flow path through which a liquid can flow. The connection insertion part 11 consists of the site | part integrally shape | molded by the front end side of the male connector 10, and has a taper surface diameter-reduced toward the front-end | tip.

  Further, between the base end portion 10 a and the connection insertion portion 11, a shaft portion 10 b formed with a length of a predetermined dimension is formed along the axial direction of the male connector 10, and connected to the shaft portion 10 b. A convex portion 10 c for preventing the locking means 12 from coming off is formed between the insertion portion 11 and the insertion portion 11. In addition, the base end part 10a, the shaft part 10b, the convex part 10c, and the connection insertion part 11 consist of integral resin parts, and constitute the male connector 10 as a whole.

  As shown in FIGS. 2 and 4, the female connector 14 has a fitting portion 14 c that can be fitted by inserting the connection insertion portion 11 of the male connector 10, and the fitting of the connection insertion portion 11 to the fitting portion 14 c. It is made of a resin (hard resin) part that is connected to the male connector 10 to allow the liquid to flow and has a male screw portion 14b formed on the outer peripheral surface. A through hole is formed in the female connector 14 in the axial direction, and the through hole constitutes a flow path through which a liquid can flow. In addition, the code | symbol 14a in the figure has shown the connection part connected with the tube 6. FIG.

  As shown in FIGS. 2 and 3, the locking means 12 is made of a substantially cylindrical resin (hard resin) component, is slidably attached to the axial direction of the male connector 10, and is formed on the male connector 10. An interference portion 12b capable of interfering with the projected portion 10c is formed, and the locking means 12 is prevented from coming off when the convex portion 10c interferes with the interference portion 12b. Further, the locking means 12 is formed with a female screw portion 12a that can be screwed with the male screw portion 14b of the female connector 14 on the inner peripheral surface, and the female screw portion 12a is screwed into the male screw portion 14b. The connection state between the male connector 10 and the female connector 14 can be locked by rotating and screwing the male screw portion 14b and the female screw portion 12a.

  That is, after the connection insertion portion 11 of the male connector 10 is inserted into the fitting portion 14c of the female connector 14 and is fitted (see FIG. 5), the locking means 12 is connected to the distal end side (the convex portion 10c side) of the male connector 10. The male connector 10 and the female connector 14 can be securely connected (fitted) by rotating the locking means 12 while moving the male screw 10 and screwing the male screw 12a to the female screw 14b (see FIG. 6). The connection between the male connector 10 and the female connector 14 is locked.

  The coil spring 13 (biasing means) is for constantly urging the locking means 12 in a direction opposite to the direction in which the screwing is loosened in a state where the female threaded portion 12a of the locking means 12 is threadedly engaged with the male threaded portion 14b. , One end is a base end portion 10a of the male connector 10, and the other end is formed of a coil-like spring that is inserted and attached to the shaft portion 10b of the male connector 10 in a compressed state by abutting against the lock means 12.

  Accordingly, as shown in FIG. 6, the locking means 12 is pressed to the left side in the drawing by the urging force of the coil spring 13, and the screwing of the female screw portion 12a to the male screw portion 14b is loosened (right direction in the drawing). By constantly applying a force in the opposite direction (left direction in the figure), it is possible to prevent the female screw portion 12a from loosening with respect to the male screw portion 14b. According to the present embodiment, the urging means 13 for constantly urging the locking means 12 in the direction opposite to the direction in which the screwing is loosened in a state where the female screw part 12a of the locking means 12 is screwed to the male screw part 14b. Thus, the loosening of the screwing by the locking means 12 can be reliably prevented.

  Moreover, since the biasing means according to the present embodiment is composed of the coil spring 13 attached by inserting the shaft portion 10b of the male connector 10, the male connector 10 and the loosening of the screwing by the locking means 12 are reliably prevented. It can suppress that the connection part of the female connector 14 enlarges by an urging | biasing means, and can attain size reduction of a locking type connection tool.

Next, a locking connector according to a second embodiment of the present invention will be described.
The lock type connector according to this embodiment is applied to the blood circuit (see FIG. 1) as in the first embodiment, and connects the tubes (6, 7) to the arterial blood circuit 1 or the venous blood circuit 2. As shown in FIGS. 7 to 12, the flow paths are mainly composed of a male connector 10, a female connector 14, a lock means 12, and a coil spring 13 as an urging means. ing. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and those detailed description is abbreviate | omitted. Similarly to the first embodiment, in order to avoid duplication of description, the lock-type connector 8 that connects the arterial blood circuit 1 and the tube 6 will be described in detail below, but the venous blood circuit 2 and the tube 7 are described below. The lock-type connector 9 for connecting the two has the same configuration.

  Here, as shown in FIGS. 8 and 10, the male connector 10 according to the present embodiment is formed with a locking portion 10 d that can lock the locking means 12 with the connection insertion portion 11 facing outward. At the same time, when the connection insertion portion 11 is fitted to the fitting portion 14 c of the female connector 14, the locking means 12 is unlocked by the locking portion 10 d so that the locking means 12 can be locked.

  That is, as shown in FIG. 8, a locking portion 10d composed of a portion protruding in the circumferential direction is integrally formed at a predetermined position in the shaft portion 10b of the male connector 10, and is shipped from an initial state (an assembly factory). In the state), the interference portion 12b of the locking means 12 and the locking portion 10d are brought into contact with each other, and the locking means 12 is locked at that position, and the state where the connection insertion portion 11 is exposed to the outside is maintained. Yes. Then, as shown in FIGS. 9 and 10, after the connection insertion portion 11 is fitted to the fitting portion 14 c of the female connector 14, the distal end side of the male connector 10 with respect to the locking means 12 (connection insertion portion 11 side). When a force is applied to the interference portion 12b, the interference portion 12b gets over the locking portion 10d and the locking is released.

  Thus, after the locking of the locking portion 10d with respect to the interference portion 12b is released, the locking means 12 is moved along the shaft portion 10b while rotating, as in the first embodiment, and the male screw portion 14b and the female screw portion 14b are moved. By screwing the screw portion 12a, the connection state between the male connector 10 and the female connector 14 can be locked as shown in FIGS. In this embodiment, after the connection insertion portion 11 is fitted to the fitting portion 14c of the female connector 14, the locking between the interference portion 12b and the locking portion 10d is released. In the process of fitting 11 to the fitting portion 14c of the female connector 14, the locking between the interference portion 12b and the locking portion 10d may be released.

  According to the present embodiment, the male connector 10 is formed with the locking portion 10d that can lock the locking means 12 with the connection insertion portion 11 facing the outside, and the connection insertion portion 11 is connected to the female connector. 14, when the locking means 12 is unlocked by the locking portion 10 d and the locking means 12 can be locked, the connection insertion portion 11 can be fitted to the fitting portion 14 c. The connection can be performed more smoothly and reliably, and the workability at the time of connection between the male connector 10 and the female connector 14 can be further improved.

Next, a locking connector according to a third embodiment of the present invention will be described.
As in the first and second embodiments, the locking connector according to this embodiment is applied to the blood circuit (see FIG. 1), and the tube (6, 7) and the arterial blood circuit 1 or the venous blood circuit 2 As shown in FIGS. 13 to 19, the male connector 10, the female connector 14, the lock means 12, the cover portion 15, and the coil spring as the urging means are connected to each other. 16 mainly.

  In the present embodiment, as shown in FIG. 14, the male connector 10 and the female connector 14 are not attached with the coil spring 13 as in the first and second embodiments. Instead, the coil spring 16 is placed in the cover portion 15. It is attached. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and those detailed description is abbreviate | omitted. Similarly to the first and second embodiments, the locking connector 8 for connecting the arterial blood circuit 1 and the tube 6 will be described in detail below to avoid duplication of explanation. The lock-type connector 9 that connects the tube 7 has the same configuration.

  The cover portion 15 is made of a resin molded product that covers the connection portion of the male connector 10 and the female connector 14, and can be protected by covering the connection portion by inserting the connection portion of the male connector 10 and the female connector 14. Yes. That is, as shown in FIGS. 17 to 19, the cover portion 15 according to the present embodiment is formed so that the front side, the back side, and the upper side are open, and the connection state is locked by the lock means 12 from the open portion. By inserting the connection portion of the male connector 10 and the female connector 14 that has been made, it is possible to prevent the connection portion from being inadvertently touched from outside.

  The cover portion 15 is provided with a coil spring 16 (biasing means) and arm portions 17 and 18 for transmitting the urging force of the coil spring 16 to the lock means 12. More specifically, as shown in FIG. 19, the arm portion 17 is integrally formed (fixed) at a predetermined position in the cover portion 15, and the arm portion 18 has a proximal end at one end portion of the coil spring 16. At the same time, it is integrally formed with a movable part 19 that can be displaced, and is movable as the coil spring 16 is displaced (compressed and contracted).

  On the other hand, as in the first and second embodiments, after inserting and fitting the connection insertion portion 11 of the male connector 10 into the fitting portion 14c of the female connector 14, the locking means 12 is connected to the distal end side of the male connector 10 ( The locking means 12 is rotated while being moved to the convex portion 10c side, the male screw portion 12a is screwed into the female screw portion 14b, and the male connector 10 and the female connector 14 are connected. Then, the connecting portion is inserted into the cover portion 15 and assembled. At the time of assembling, as shown in FIG. 16, the arm portion 17 is brought into contact with the locking means 12, and the arm portion 18 is brought into contact with the base end portion 10a. Make contact.

  As a result, the urging force of the coil spring 16 is transmitted to the locking means 12 via the arm portions 17 and 18, so that the urging force of the coil spring 16 presses the locking means 12 to the left side in the figure and the male screw portion 12a By constantly applying a force in the opposite direction (left direction in the figure) to the direction in which the screwing to the screw part 14b is loosened (right direction in the figure), the female screw part 12a is applied to the male screw part 14b. Can be prevented from loosening.

  According to the present embodiment, the cover portion 15 that covers the connection portion of the male connector 10 and the female connector 14 is provided, and the coil spring 16 (biasing means) is attached to the cover portion 15, so The connecting portion of the male connector 10 and the female connector 14 can be protected by the cover portion 15 while reliably preventing the loosening of the joint. Further, since the cover portion 15 according to the present embodiment has arm portions (17, 18) for transmitting the urging force of the coil spring 16 (biasing means) to the locking means 12, the arrangement of the coil spring 16 with respect to the cover portion 15 is arranged. The installation position can be arbitrarily set, and loosening of the screwing by the locking means 12 can be prevented more reliably.

  According to the first to third embodiments, the locking means 12 is always urged in a direction opposite to the direction in which the screwing is loosened in a state where the female screw part 12a of the locking means 12 is screwed into the male screw part 14b. Since the biasing means (coil springs 13 and 16) are provided, the loosening of the screwing by the lock means 12 can be reliably prevented. Moreover, in the said 1st-3rd embodiment, it can apply to the medical fluid flow path other than the blood circuit shown in FIG. 1, and can prevent the loosening of the screwing by the locking means 12 reliably. It is possible to provide a medical fluid channel that can be used.

  Further, according to the first and second embodiments, the male connector 10 and the female connector of the locking connector are adopted by adopting the configuration in which the shaft portion 10b of the male connector 10 is inserted into the coil spring 13 used as the urging means. The operation procedure at the time of locking the connection state with 14 can be made the same as the operation procedure of a conventional lock-type connector provided with a lock ring. For this reason, it is possible to prevent the occurrence of a medical accident due to a human error in which a medical worker mistakes the operation procedure and forgets to lock.

  Although the present embodiment has been described above, the present invention is not limited thereto. For example, in the state where the female screw portion 12a of the locking means 12 is screwed into the male screw portion 14b, the direction opposite to the direction in which the screwing is loosened is opposite. If the urging means for constantly urging the locking means 12 in the direction is replaced with other general-purpose urging means (other forms of torsion springs, etc.) instead of the coil springs (13, 16) as in this embodiment. Spring, rubber material, resin, or the like). In the present embodiment, as described above, the present invention is applied to a lock-type connector called a shunt connector for connecting a puncture needle to the tip of a blood circuit. However, in order to connect a liquid or gas flow path. The present invention may be applied to other types of lock-type connectors (not limited to medical use).

  The lock-type connector of the present invention includes a biasing means for constantly biasing the locking means in a direction opposite to the direction in which the screwing is loosened in a state where the female threaded portion of the locking means is screwed into the male threaded portion. As long as it is a thing, the thing with a different external appearance shape or another function may be added.

1 Arterial blood circuit 2 Venous blood circuit 3 Dialyzer (blood purifier)
4 Blood pump 5 Air trap chamber 6, 7 Tube 8, 9 Lock type connector 10 Male connector 11 Connection insertion part 12 Locking means 12a Female thread part 13 Coil spring (biasing means)
14 Female connector 14b Male thread portion 14c Fitting portion 15 Cover portion 16 Coil spring (biasing means)
17, 18 Arm part 19 Movable part

Claims (7)

A male connector in which a tube that can circulate liquid is connected to the base end, and a connection insertion part is formed at the tip, and
It has a fitting part that can be fitted by inserting the connection insertion part, and is connected to the male connector by fitting of the connection insertion part to the fitting part so that liquid can be circulated, and an outer peripheral surface A female connector with a male thread formed on the
A female screw portion that can be screwed to the male screw portion is formed on the inner peripheral surface of the male connector and the female connector between the male connector and the female connector by screwing the female screw portion to the male screw portion. Locking means for locking the connection state;
In the lock type connecting device comprising:
A lock comprising a biasing means for constantly biasing the locking means in a direction opposite to the direction in which the screwing is loosened in a state where the female threaded portion of the locking means is screwed into the male threaded portion. Type connector.   The male connector is formed with a locking portion capable of locking the locking means with the connection insertion portion facing outside, and the connection insertion portion is fitted to the fitting portion of the female connector. 2. The locking connector according to claim 1, wherein the locking means is unlocked by the locking portion to enable locking by the locking means.   3. The locking connector according to claim 1, wherein the urging means comprises a coil spring.   4. The locking connector according to claim 3, wherein the shaft portion of the male connector is inserted into the coil spring and assembled.   The lock type according to any one of claims 1 to 3, further comprising a cover portion that covers a connection portion of the male connector and the female connector, and the urging means is attached to the cover portion. Connection tool.   6. The locking connector according to claim 5, wherein the cover portion has an arm portion for transmitting the urging force of the urging means to the locking means.   A medical fluid flow path comprising the locking connector according to any one of claims 1 to 6.

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