Hemostatic valve opening / closing mechanism and medical connector

Abstract

To improve operability of an opening / closing mechanism.SOLUTION: A penetration member can be located at a first position of making a hemostatic valve close and a second position of pressing the hemostatic valve to make it open. A ring pin includes a ring-shaped body part surrounding the penetration member and a pin part projecting from the body part. An energizing member energizes the penetration member toward a proximal side. The pin part of the ring pin is loosely fitted in a movement regulation groove formed on a surface of the penetration member. The movement regulation groove includes a closed position part in which the pin part is fitted when the penetration member is in the first position, a first top part in which the pin part is fitted when the penetration member reaches from the state a position in a distal side with respect to the second position, an opening holding part in which the pin part is fitted so as to regulate movement of the penetration member to the distal side, when the penetration member is displaced from the state to the second position, and a second top part in which the pin part is fitted when the penetration member reaches from the state the position in the distal side with respect to the second position.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The technology disclosed in this specification relates to an opening / closing mechanism of a hemostatic valve, a fixing mechanism of a long medical device, and a medical connector.

Background Art

[0002] A Y-connector is a medical connector used by being connected to a guiding catheter. The Y-connector has a main pipe portion and a branch pipe portion branched from the main pipe portion. A long medical device such as a guide wire or a catheter is introduced into the guiding catheter through the main pipe portion, and a liquid agent such as a contrast agent or a physiological saline solution is supplied through the branch pipe portion. The Y-connector is provided with an opening / closing mechanism for opening and closing a hemostatic valve that suppresses the outflow of blood through the lumen of the main pipe portion, and a fixing mechanism for fixing the long medical device.

[0003] In the opening / closing mechanism of the hemostatic valve in a conventional Y-connector, a through member (opener) having a through hole coaxial with the lumen of the main pipe portion is provided. By performing an operation of pressing the through member in a direction parallel to the axial direction of the lumen of the main pipe portion, the through member presses the hemostatic valve to switch between an open state in which the hemostatic valve is opened and a closed state in which the through member is separated from the hemostatic valve and the hemostatic valve is closed (see, for example, Patent Document 1). At this time, by a so-called double knock mechanism having a rotary cam, the open state or the closed state of the hemostatic valve is maintained even after the pressing operation on the through member by the operator is released. Further, in the fixing mechanism of the long medical device in a conventional Y-connector, an elastic fixing valve having a through hole through which the long medical device is inserted is provided. By rotating the screw and moving it in the axial direction, and accordingly moving the pusher in the axial direction, the fixing valve is pressed by the pusher and elastically deformed, and the inner diameter of the through hole of the fixing valve is reduced to switch between a fixed state in which the long medical device is fixed and a fixed release state in which the fixing valve is not pressed by the pusher and the inner diameter of the through hole of the fixing valve is enlarged to release the fixing of the long medical device (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] Japanese Patent No. 5249049 [Summary of the Invention] [Problems to be Solved by the Invention]

[0005] In the configuration of the conventional Y-connector described above, in order to maintain the open or closed state of the hemostatic valve, a rotary cam formed over the entire circumference is used in the cam mechanism. Therefore, an urging member for urging the penetrating member toward the proximal end side needs to be installed between the hemostatic valve and the penetrating member to avoid interference with the cam mechanism, resulting in a problem that the overall length of the device increases. For this reason, a new design is required for the opening / closing mechanism of the hemostatic valve. Further, in the configuration of the conventional Y-connector described above, since the fixing / fixing release operation of the long medical device is an operation of rotating a screw, the operation is complicated, and there is a problem that the fixing state of the long medical device cannot be grasped tactilely or visually. Note that such problems are common problems not only for Y-connectors but also for medical connectors provided with an opening / closing mechanism of a hemostatic valve and / or a fixing mechanism of a long medical device.

[0006] This specification discloses a technology capable of solving the above-described problems. [Means for Solving the Problems]

[0007] The technology disclosed in this specification can be realized, for example, in the following forms.

[0008] (1) The opening and closing mechanism of the hemostatic valve disclosed in this specification includes a housing, a hemostatic valve, a penetrating member, a ring pin, and a biasing member. The housing is a tubular member in which a lumen communicating with a distal end side opening and a proximal end side opening is formed. The hemostatic valve is attached within the housing and is normally in a closed state. When pressed from the proximal end side, it becomes an open state in which a through hole communicating with the distal end side opening of the housing is formed. The penetrating member is a member in which a through hole is formed, and is accommodated within the housing so as to be slidable along a first direction which is the extending direction of the lumen on the proximal end side of the hemostatic valve. The penetrating member can be located at a first position for closing the hemostatic valve and a second position displaced distally along the first direction from the first position. The second position is a position for pressing the hemostatic valve to make the hemostatic valve in the open state and communicating the through hole of the hemostatic valve with the through hole of the penetrating member. The ring pin has a ring-shaped main body portion surrounding the outer peripheral surface of the penetrating member and a pin portion protruding radially inward from the main body portion. The ring pin is accommodated within the housing in a state where its movement in the first direction is restricted on the proximal end side of the hemostatic valve and rotation around the first direction is permitted. The biasing member biases the penetrating member toward the proximal end side. An operation restricting groove that is continuous in one circumference is formed on the surface of the penetrating member, and the pin portion of the ring pin is loosely fitted in the operation restricting groove. The operation restricting groove is formed with a closed position portion, a first top portion, an open holding portion, and a second top portion. The closed position portion is a portion where the pin portion fits without restricting the distalward movement of the penetrating member when the penetrating member is in a first state at the first position. The first top portion is a portion where the pin portion fits without restricting the proximalward movement of the penetrating member when the penetrating member reaches a position distal to the second position from the first state to a second state. The open holding portion is a portion where the pin portion fits so as to restrict the proximalward movement of the penetrating member when the penetrating member is displaced to the second position by the biasing force of the biasing member from the second state to a third state.The second top portion is a portion into which the pin portion fits without restricting the movement of the penetration member toward the proximal end side when the penetration member reaches a position on the distal end side of the second position in the fourth state from the third state.

[0009] As described above, in this opening and closing mechanism, when the penetration member is located at the first position and the hemostatic valve is in the closed state, if the penetration member receives a pressing force and slides inwardly of the housing along the first direction, the penetration member moves to a position on the distal end side of the second position. As a result, the pin portion of the ring pin reaches the first top portion, which is a portion that fits in the movement restricting groove without restricting the movement of the penetration member toward the proximal end side. Thereafter, when the pressing force applied to the penetration member is released, the penetration member moves toward the proximal end side to the second position by the biasing force of the biasing member, and the hemostatic valve switches from the open state to the closed state. At this time, since the pin portion of the ring pin moves from the first top portion in the movement restricting groove to the opening holding portion, the movement of the penetration member toward the proximal end side is restricted and the penetration member is maintained at the second position, so that the open state of the hemostatic valve is maintained. Also, when the penetration member receives a pressing force again and slides inwardly of the housing along the first direction, the penetration member moves to a position on the distal end side of the second position. As a result, the pin portion of the ring pin reaches the second top portion, which is a portion that fits in the movement restricting groove without restricting the movement of the penetration member toward the proximal end side. Thereafter, when the pressing force applied to the penetration member is released, the penetration member moves toward the proximal end side to the first position by the biasing force of the biasing member, and the hemostatic valve switches from the open state to the closed state. Therefore, according to this opening and closing mechanism, every time an operator performs an operation of pressing the penetration member, the opening and closing state of the hemostatic valve can be switched and the state can be held, so that the operability of the opening and closing mechanism can be improved.

[0010] (2) In the opening / closing mechanism of the hemostatic valve, a hollow annular accommodation hole extending in the first direction is formed on the outer peripheral side of the through-hole in the through-member, and a slit extending in the first direction and communicating with the accommodation hole is formed on the outer peripheral surface of the through-member. The biasing member is cylindrical and is accommodated in the accommodation hole of the through-member. A convex portion protruding radially inward may be formed on the inner peripheral surface of the housing, and the convex portion is inserted into the slit of the through-member to restrict the movement of the tip side of the biasing member. According to the opening / closing mechanism of this hemostatic valve, the biasing member can be disposed within the through-member, and the overall length of the device can be shortened as compared with the configuration in which the biasing member is installed between the hemostatic valve and the through-member.

[0011] (3) The fixing mechanism of the long medical device disclosed in this specification includes a circular tubular body, a shaft member, at least two valve levers, an elastic body, and a power applying member. The circular tubular body is a flexible circular tubular member in which a through hole into which the long medical device is inserted is formed. The shaft member is a tubular member in which a lumen for accommodating the circular tubular body is formed. At least two slit holes communicating the lumen and the outer peripheral surface are formed in the shaft member, and support portions provided for each slit hole are formed. Each valve lever is supported by the support portion so as to be rotatable about the support portion as a fulcrum on the outer peripheral side of the shaft member. Each valve lever has a lever portion protruding to the outer peripheral side and a claw portion provided at a position where it can interfere with the circular tubular body through the slit hole of the shaft member as the valve lever rotates, and a recess is formed. The elastic body is disposed so as to surround the shaft member and engages with the recess of each valve lever in a tensioned state. The power applying member is a member that slides in a first direction which is the axial direction of the circular tubular body at a position where it interferes with the lever portion of each valve lever. This fixing mechanism is configured such that as the power applying member slides from a first position to a second position, the lever portion of each valve lever is pressed, causing the valve lever to rotate, and the claw portion is separated from the circular tubular body to be in a first state, and as the power applying member slides from the second position to the first position, the lever portion of each valve lever is pressed, causing the valve lever to rotate, and the claw portion interferes with the circular tubular body to be in a second state where the inner diameter of the through hole of the circular tubular body is deformed to become smaller.

[0012] Thus, in this fixing mechanism, by sliding the power-applying member from the second position to the first position along the first direction which is the extending direction of the cylindrical body, each valve lever can be switched from the first state where it does not interfere with the cylindrical body to the second state where it interferes with the cylindrical body. As a result, the inner diameter of the through hole of the cylindrical body is reduced by being pressed by the claw portion of each valve lever, and the long medical device can be fixed. At this time, each valve lever is held in the second state by the tension of the elastic body, so that the state in which the long medical device is fixed is maintained. Also, by sliding the power-applying member from the first position to the second position along the first direction, each valve lever can be switched from the second state to the first state. As a result, the interference of the claw portion of each valve lever with the cylindrical body is released, and the fixed state of the long medical device is released. At this time, each valve lever is held in the first state by the tension of the elastic body, so that the state in which the fixing of the long medical device is released is maintained. Therefore, according to this fixing mechanism, the fixing and release of the long medical device can be realized by an operation of sliding the power-applying member, which is an easier operation compared to the conventional operation of rotating a screw. In addition, since the fixing condition of the long medical device can be grasped by touch and vision, the operability of the fixing mechanism can be improved.

[0013] (4) In the fixing mechanism of the long medical device, a plurality of pairs of the two valve levers facing each other with the cylindrical body interposed therebetween may be provided, and the positions of the claw portions in the second state in each pair of the valve levers may be different from each other along the first direction. According to the fixing mechanism of the long medical device, the long medical device can be fixed at a plurality of positions along the first direction in the cylindrical body by the claw portions of the plurality of pairs of valve levers, and the certainty of fixing the long medical device can be improved.

[0014] Note that the technology disclosed in this specification can be implemented in various forms. For example, it can be implemented in the form of an opening / closing mechanism for a hemostatic valve, a fixing mechanism for a long medical device, a medical connector provided with an opening / closing mechanism for a hemostatic valve and / or a fixing mechanism for a long medical device, a medical device provided with a medical connector, and the like.

Brief Description of the Drawings

[0015]

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Mode for Carrying Out the Invention

[0016] A. Embodiment: A-1. Configuration of the medical connector: FIG. 1 is an explanatory view showing the configuration of the medical connector in this embodiment. FIG. 1 shows the configuration of the longitudinal section (YZ section) of the medical connector 10. The medical connector 10 of this embodiment is a Y-connector that is connected to the guiding catheter GC via the rotator 20 and used. In this specification, in the medical connector 10, the side (the positive Z-axis direction side) to which the guiding catheter GC is connected is referred to as the distal end side, and the opposite side (the negative Z-axis direction side) is referred to as the proximal end side. Also, for the medical connector 10 and each of its constituent members, the end on the distal end side is referred to as the "tip", the tip and its vicinity are referred to as the "tip portion", the end on the proximal end side is referred to as the "proximal end", and the proximal end and its vicinity are referred to as the "proximal end portion". Also, for the sake of convenience of explanation, the Z-axis direction is also referred to as the front-rear direction, the Y-axis direction is also referred to as the up-down direction, the positive Y-axis direction is also referred to as the upward direction, the negative Y-axis direction is also referred to as the downward direction, and the X-axis direction is also referred to as the left-right direction. However, the posture of the medical connector 10 is not limited to this.

[0017] The medical connector 10 has a tubular main pipe portion 11 that extends in the front-rear direction, and a tubular branch pipe portion 12 that branches from the vicinity of the tip portion thereof and extends obliquely upward toward the proximal end side. A lumen 13 that extends in the front-rear direction and penetrates the main pipe portion 11 is formed in the main pipe portion 11, and a long medical device (not shown) such as a guide wire or a catheter is introduced into the guiding catheter GC through the lumen 13. Also, a lumen 14 that communicates with the lumen 13 is formed in the branch pipe portion 12, and a liquid agent such as a contrast agent or physiological saline is supplied through the lumen 14 from a liquid agent supply device (not shown) connected to the end portion of the branch pipe portion 12.

[0018] The medical connector 10 includes a hemostatic valve opening / closing mechanism 100 and a fixing mechanism 200 for a long medical device. The opening / closing mechanism 100 is provided on the proximal side of the fixing mechanism 200. Further, the portion of the medical connector 10 on the distal side of the fixing mechanism 200 is constituted by a joint member 300 that functions as the distal end portion of the main pipe portion 11 and the branch pipe portion 12. Hereinafter, the configurations of the opening / closing mechanism 100 and the fixing mechanism 200 will be described in this order.

[0019] The medical connector 10 is held and used by a technician such as a doctor. For example, the technician holds the main pipe portion 11 of the medical connector 10 in the posture shown in FIG. 1 so that the four fingers from the index finger to the little finger cover the main pipe portion 11 from above, and the thumb is located near the proximal end portion of the penetrating member 140 of the opening / closing mechanism 100 or near the proximal end portion of the power applying member 270 of the fixing mechanism 200, and holds the medical connector 10.

[0020] A-2. Configuration of the hemostatic valve opening / closing mechanism 100: Next, the configuration of the hemostatic valve opening / closing mechanism 100 will be described. FIGS. 2 to 5 are explanatory views showing the configuration of the opening / closing mechanism 100 in the present embodiment. FIGS. 2 and 3 show the longitudinal section (YZ section) thereof, and FIGS. 4 and 5 show the external perspective view thereof. FIGS. 2 and 4 show the opening / closing mechanism 100 in a state where the hemostatic valve 120 is closed (hereinafter referred to as "closed state opening / closing mechanism 100c"), and FIGS. 3 and 5 show the opening / closing mechanism 100 in a state where the hemostatic valve 120 is opened (hereinafter referred to as "open state opening / closing mechanism 100o").

[0021] The opening / closing mechanism 100 is a mechanism for opening and closing a hemostatic valve 120 that suppresses the outflow of blood through the lumen 13 (FIG. 1). The opening / closing mechanism 100 of the present embodiment is a mechanism that switches between a state where the hemostatic valve 120 is closed and a state where the hemostatic valve 120 is opened every time a pressing operation by a technician is performed on the penetrating member 140. The opening / closing mechanism 100 includes a housing 110, a hemostatic valve 120, a penetrating member 140, a ring pin 160, and a biasing member 106.

[0022] As shown in FIGS. 2 and 3, the housing 110 is a tubular member having a distal end side opening 112 and a proximal end side opening 111, and a lumen 113 communicating therebetween is formed. The lumen 113 formed in the housing 110 is a through hole extending in the front-rear direction (Z-axis direction), and constitutes a part of the lumen 13 of the main pipe portion 11 of the medical connector 10. The housing 110 is formed of, for example, resin. In FIGS. 4 and 5, the illustration of the housing 110 is omitted. The Z-axis direction is an example of the first direction in the claims.

[0023] In the present embodiment, the housing 110 has three portions arranged in the front-rear direction, that is, a distal end side portion 110D, an intermediate portion 110M, and a proximal end side portion 110P. Each of these portions is a tubular member in which a lumen extending in the front-rear direction is formed. The proximal end portion of the intermediate portion 110M is inserted and fixed into the lumen at the distal end portion of the proximal end side portion 110P, and the proximal end portion of the distal end side portion 110D is inserted and fixed into the lumen at the distal end portion of the intermediate portion 110M, whereby the proximal end side portion 110P, the intermediate portion 110M, and the distal end side portion 110D are integrated to form the housing 110.

[0024] FIG. 6 is a perspective view showing the external configuration of the proximal end side portion 110P of the housing 110 and the ring pin 160. As shown in FIGS. 2, 3, and 6, a flange portion 115 protruding in the outer peripheral direction is formed at the proximal end portion of the proximal end side portion 110P of the housing 110. Further, a convex portion 114 protruding radially inward is formed on the inner peripheral surface near the approximate center in the front-rear direction of the proximal end side portion 110P. In the present embodiment, two convex portions 114 facing each other in the radial direction are formed on the proximal end side portion 110P.

[0025] FIG. 7 is a perspective view showing the appearance configuration of the distal end side portion 110D of the housing 110 and the hemostatic valve 120. As shown in FIGS. 2, 3, and 7, a first wall portion 116 extending from the outer peripheral surface toward the radial center is formed at the distal end portion of the distal end side portion 110D. The shape of the first wall portion 116 in the Z-axis direction view is an annular shape in which a hole constituting the lumen 113 is formed. Further, a second wall portion 117 extending from the distal end of the first wall portion 116 toward the proximal end side is formed at the distal end portion of the distal end side portion 110D. The second wall portion 117 is substantially cylindrical and extends in the front-rear direction. Due to the presence of the first wall portion 116 and the second wall portion 117, a substantially hollow cylindrical accommodation space 118 is formed at the distal end portion of the distal end side portion 110D.

[0026] As shown in FIGS. 2 to 5 and 7, the hemostatic valve 120 is a member having a substantially disc-shaped main body portion 127 and a substantially cylindrical convex portion 128 protruding from the outer peripheral portion thereof toward the distal end side, and is formed of an elastic material such as silicone rubber. The hemostatic valve 120 is housed inside the distal end portion of the housing 110. More specifically, the hemostatic valve 120 is fixed to the housing 110 by inserting the convex portion 128 into the accommodation space 118 formed in the distal end side portion 110D of the housing 110. A slit 121 is formed at a substantially central position in the Z-axis direction view of the main body portion 127 (FIG. 4). The hemostatic valve 120 is normally in a closed state in which the slit 121 is closed and the valve is closed (FIGS. 2 and 4). When the hemostatic valve 120 is in the closed state, the lumen 113 is closed by the hemostatic valve 120, and the outflow of blood from the hemostatic valve 120 to the proximal end side through the lumen 113 is suppressed. Further, when the hemostatic valve 120 is pressed from the proximal end side, it elastically deforms so that each piece separated by the slit 121 is displaced toward the distal end side, and an open state is formed in which a through hole 122 penetrating the hemostatic valve 120 in the front-rear direction is formed (FIGS. 3 and 5). In the open state, the through hole 122 communicates with the distal end side opening 112 through the lumen 113. Therefore, when the hemostatic valve 120 is in the open state, the lumen 113 is not closed at the position of the hemostatic valve 120 and is in an open state. When the pressing force from the proximal end side disappears, the hemostatic valve 120 elastically deforms and returns to the closed state.

[0027] Figs. 8 and 9 are perspective views showing the external configuration of the through member 140 in the present embodiment. In the present embodiment, the through member 140 has three parts arranged in the front-rear direction, that is, a tip-side part 140D, an intermediate part 140M, and a base-end side part 140P. In Fig. 9, the illustration of the intermediate part 140M is omitted to show the internal configuration of the through member 140. The tip-side part 140D, the intermediate part 140M, and the base-end side part 140P are joined to each other to form the through member 140 integrally. The through member 140 is a member in which a through hole 142 extending in the front-rear direction is formed, and is formed of, for example, resin.

[0028] A flange part 145 protruding in the outer peripheral direction is formed at the base end of the base-end side part 140P of the through member 140. Also, the tip part 144 of the tip-side part 140D has a smaller diameter than the other parts. Further, a hollow annular accommodation hole 147 extending in the front-rear direction is formed on the outer peripheral side of the through hole 142 in the intermediate part 140M and the base-end side part 140P. The base end of the accommodation hole 147 extends to the base end of the base-end side part 140P, and the tip of the accommodation hole 147 extends to the vicinity of the tip part of the intermediate part 140M. Further, a slit 148 extending in the front-rear direction is formed on the outer peripheral surface of the through member 140. In the present embodiment, two slits 148 facing each other in the radial direction are formed on the outer peripheral surface of the through member 140. The tip of each slit 148 is open, and the base end of the slit 148 reaches the vicinity of the tip part of the base-end side part 140P. Each slit 148 communicates with the accommodation hole 147. Further, an operation restriction groove 40 is formed on the outer peripheral surface of the intermediate part 140M of the through member 140. The operation restriction groove 40 is a so-called heart cam groove, which is a groove that is connected in a loop in a heart shape. As shown in Figs. 2 and 3, a substantially C-shaped flat ring member 102 is attached to the outer periphery of the tip part 144 in a front-rear view.

[0029] As shown in FIGS. 2 and 3, the penetrating member 140 is accommodated on the proximal side of the hemostatic valve 120 inside the housing 110. In the penetrating member 140 accommodated in the housing 110, the through hole 142 communicates with the lumen 113 of the housing 110. Further, the through hole 142 of the penetrating member 140 and the lumen 113 of the housing 110 are coaxial with each other. Further, the proximal end portion of the proximal end side portion 140P of the penetrating member 140 is exposed from the housing 110, and a pressing operation by a technician such as a doctor is possible.

[0030] The penetrating member 140 is slidable in the front-rear direction while being positioned in the vertical and horizontal directions with respect to the housing 110. The penetrating member 140 is positioned such that the through hole 142 faces the slit 121 of the hemostatic valve 120 in the front-rear direction. The penetrating member 140 slidable in the front-rear direction can be positioned at a pressing position P2 (FIGS. 3 and 5) where the distal end portion 144 presses the hemostatic valve 120 to open the hemostatic valve 120, and a non-pressing position P1 (FIGS. 2 and 4) where the hemostatic valve 120 is closed without pressing the hemostatic valve 120. In the present embodiment, the penetrating member 140 positioned at the non-pressing position P1 is separated from the hemostatic valve 120 on the proximal side, but the penetrating member 140 may be arranged so as to contact the hemostatic valve 120 to restrict the slit 121 from deforming rearward. As shown in FIGS. 3 and 5, in a state where the penetrating member 140 is positioned at the pressing position P2, the through hole 122 and the through hole 142 communicate with each other. The pressing position P2 is an example of the second position in the claims, and the non-pressing position P1 is an example of the first position in the claims.

[0031] The biasing member 106 is, for example, a substantially cylindrical spring. The spring is formed of a metal such as stainless steel. As shown in FIGS. 2 and 3, the biasing member 106 is housed in a hollow annular housing hole 147 formed in the penetrating member 140. The housing hole 147 is closed by a lid member 108 attached to the proximal end side of the penetrating member 140. The proximal end of the biasing member 106 housed in the housing hole 147 abuts against the distal end side surface of the lid member 108. Further, the distal end of the biasing member 106 abuts against the convex portion 114 of the housing 110. Therefore, the biasing member 106 biases the penetrating member 140 toward the proximal end side with respect to the housing 110. The biased penetrating member 140 is positioned at a non-pressing position P1 (FIGS. 2 and 4) where it does not press the hemostatic valve 120 in a state where it is not subjected to a pressing operation by an operator.

[0032] As shown in FIGS. 2 to 6, the ring pin 160 is a member having a ring-shaped main body portion 161 and a pin portion 162 protruding radially inward from the main body portion 161, and is formed of, for example, resin. The main body portion 161 is arranged so as to surround the outer peripheral surface of the penetrating member 140, and is fitted to the penetrating member 140 so that the spring property of the main body portion 161 presses the pin portion 162 against an operation restricting groove 40 formed on the surface of the penetrating member 140. The pin portion 162 is loosely fitted in the operation restricting groove 40. As shown in FIGS. 2 and 3, the ring pin 160 is housed at a position on the proximal end side of the hemostatic valve 120. The ring pin 160 is restricted from moving in the front-rear direction by being sandwiched between the proximal end side surface of the intermediate portion 110M and the distal end side surface of the proximal end side portion 110P in the housing 110. On the other hand, the ring pin 160 is allowed to rotate about the Z axis.

[0033] The position of the pin portion 162 in the movement restricting groove 40 changes as the through member 140 slides in the front-rear direction (Z-axis direction). FIGS. 10 and 11 are explanatory views showing the position of the pin portion 162 in the movement restricting groove 40 in the present embodiment. FIGS. 10 and 11 show the planar configurations of the through member 140, the ring pin 160, and the hemostatic valve 120. FIG. 10 shows the closed-state opening / closing mechanism 100c in which the through member 140 is in the non-pressed position P1 and the hemostatic valve 120 is closed, and FIG. 11 shows the open-state opening / closing mechanism 100o in which the through member 140 is in the pressed position P2 and a through hole 122 is formed in the hemostatic valve 120.

[0034] As shown by the white arrows in FIGS. 10 and 11, as the through member 140 slides in the front-rear direction (Z-axis direction), the pin portion 162 rotates and oscillates about the Z-axis while relatively moving in one direction (counterclockwise in the illustrated example) within the movement restricting groove 40. That is, as shown in FIG. 10, in the first state where the through member 140 is at the non-pressing position P1, the pin portion 162 is located at the heart-shaped bottom portion (hereinafter referred to as the “closed position portion 40A”) in the movement restricting groove 40. In this state, the movement of the through member 140 toward the tip side is not restricted by the pin portion 162. When the through member 140 moves toward the tip side (positive Z-axis direction) from the first state, accordingly, the pin portion 162 relatively moves toward the base end side within the movement restricting groove 40. In the second state where the through member 140 is displaced from the non-pressing position P1 to the pressing position P2 and further reaches a position on the tip side of the pressing position P2, the pin portion 162 is located at one of a pair of top portions (hereinafter referred to as the “first top portion 40B”) that sandwich the heart-shaped valley portion in the movement restricting groove 40. In this state, the movement of the through member 140 toward the base end side is not restricted by the pin portion 162. In the third state where the through member 140 moves back a little toward the base end side from the second state and moves to the pressing position P2, as shown in FIG. 11, the pin portion 162 relatively moves toward the tip side within the movement restricting groove 40 and reaches the heart-shaped valley portion (hereinafter referred to as the “open holding portion 40C”) in the movement restricting groove 40. In this state, due to the interference between the pin portion 162 and the movement restricting groove 40, the movement of the through member 140 toward the base end side is restricted, and the state where the through member 140 is located at the pressing position P2 is maintained. In the fourth state where the through member 140 moves a little toward the tip side from the third state and reaches a position on the tip side of the pressing position P2, the pin portion 162 relatively moves toward the base end side within the movement restricting groove 40 and is located at the other of the pair of top portions (hereinafter referred to as the “second top portion 40D”) that sandwich the heart-shaped valley portion in the movement restricting groove 40. In this state, the movement of the through member 140 toward the base end side is not restricted by the pin portion 162. When the through member 140 moves from the fourth state toward the base end side to the non-pressing position P1, accordingly, the pin portion 162 relatively moves toward the tip side within the movement restricting groove 40 and returns to the closed position portion 40A in the movement restricting groove 40 (FIG. 10).In this embodiment, a step in the depth direction is provided at the boundary positions of each part (closed position part 40A, first top part 40B, open holding part 40C, and second top part 40D) in the movement restricting groove 40, and the pin part 162 is restricted from moving backward in the movement restricting groove 40.

[0035] A-3. Operation of the opening / closing mechanism 100 of the hemostatic valve 120: Next, the operation of the opening / closing mechanism 100 will be described. In the initial state, as shown in FIGS. 2 and 4, the penetrating member 140 is located at the non-pressing position P1 where it does not press the hemostatic valve 120 under the biasing force of the biasing member 106. In this state, the hemostatic valve 120 is closed, and the opening / closing mechanism 100 is in the closed state opening / closing mechanism 100c. At this time, as shown in FIG. 10, the pin part 162 is located at the closed position part 40A in the movement restricting groove 40.

[0036] For example, when a valve opening operation of pressing the flange part 145 toward the inner side of the housing 110 is applied by the thumb of an operator holding the medical connector 10, the penetrating member 140 slides from the non-pressing position P1 toward the distal end side against the biasing force of the biasing member 106. Along with this, the pin part 162 relatively moves toward the proximal end side in the movement restricting groove 40. When the penetrating member 140 moves a certain distance or more toward the distal end side, the distal end part 144 of the penetrating member 140 presses the hemostatic valve 120 to open the hemostatic valve 120. After the penetrating member 140 reaches a position on the distal end side of the pressing position P2 and the pin part 162 reaches the first top part 40B of the movement restricting groove 40, when the valve opening operation by the operator is released, as shown in FIG. 11, the penetrating member 140 moves slightly back toward the proximal end side by the biasing force of the biasing member 106. Along with this, the pin part 162 relatively moves toward the distal end side in the movement restricting groove 40 and reaches the open holding part 40C. In this state, since the movement of the penetrating member 140 toward the proximal end side is restricted by the interference between the pin part 162 and the movement restricting groove 40, the state where the penetrating member 140 is located at the pressing position P2 is maintained. As a result, the opening / closing mechanism 100 becomes the open state opening / closing mechanism 100o shown in FIGS. 3 and 5.

[0037] Also, when the opening and closing mechanism 100 is in the open state opening and closing mechanism 100o, for example, when a valve closing operation of pressing the flange portion 145 toward the inner side of the housing 110 is applied by the thumb of an operator in the same manner as the valve opening operation, the penetrating member 140 slides toward the distal end side from the pressing position P2 against the biasing force of the biasing member 106. Along with this, the pin portion 162 relatively moves toward the proximal end side from the opening holding portion 40C in the operation restricting groove 40 and reaches the second top portion 40D. In this state, the movement of the penetrating member 140 toward the proximal end side is not restricted by the pin portion 162. Therefore, when the valve closing operation by the operator is released, the penetrating member 140 moves toward the proximal end side by the biasing force of the biasing member 106 and returns to the non-pressing position P1. Along with this, as shown in FIG. 10, the pin portion 162 relatively moves toward the distal end side within the operation restricting groove 40 and returns to the closed position portion 40A. As a result, the hemostatic valve 120 is in the closed state, and the opening and closing mechanism 100 becomes the closed state opening and closing mechanism 100c shown in FIGS. 2 and 4.

[0038] Thus, every time a pressing operation (valve opening operation and valve closing operation) is performed on the penetrating member 140, the state of the opening and closing mechanism 100 switches between the closed state opening and closing mechanism 100c and the open state opening and closing mechanism 100o.

[0039] A-4. Technical effects of the opening and closing mechanism 100 of the hemostatic valve 120: As described above, in the opening / closing mechanism 100, when the penetrating member 140 is located at the non-pressing position P1 and the hemostatic valve 120 is in the closed state, if the penetrating member 140 receives a pressing force and slides along the front-rear direction to the inner side of the housing 110, the penetrating member 140 moves to a position on the tip side from the pressing position P2. As a result, the pin portion 162 reaches the first top portion 40B which is a portion where the pin portion 162 fits in the operation restricting groove 40 without restricting the movement of the penetrating member 140 toward the proximal end side. After that, when the pressing force applied to the penetrating member 140 is released, the penetrating member 140 moves toward the proximal end side to the pressing position P2 by the biasing force of the biasing member 106, and the hemostatic valve 120 switches from the open state to the closed state. At this time, as the pin portion 162 moves from the first top portion 40B in the operation restricting groove 40 to the opening holding portion 40C, the movement of the penetrating member 140 toward the proximal end side is restricted and the penetrating member 140 is maintained at the pressing position P2, so that the open state of the hemostatic valve 120 is maintained. Further, when the penetrating member 140 receives a pressing force again and slides along the front-rear direction to the inner side of the housing 110, the penetrating member 140 moves to a position on the tip side from the pressing position P2. As a result, the pin portion 162 reaches the second top portion 40D which is a portion where the pin portion 162 fits in the operation restricting groove 40 without restricting the movement of the penetrating member 140 toward the proximal end side. After that, when the pressing force applied to the penetrating member 140 is released, the penetrating member 140 moves toward the proximal end side to the non-pressing position P1 by the biasing force of the biasing member 106, and the hemostatic valve 120 switches from the open state to the closed state. Therefore, according to the opening / closing mechanism 100, every time an operator performs an operation of pressing the penetrating member 140, the opening / closing state of the hemostatic valve 120 can be switched and the state can be held, so that the operability of the opening / closing mechanism 100 can be improved.

[0040] In addition, in the opening / closing mechanism 100, a hollow annular accommodation hole 147 extending in the front-rear direction is formed on the outer peripheral side of the through-hole 142, and a slit 148 extending in the front-rear direction and communicating with the accommodation hole 147 is formed on the outer peripheral surface of the through-member 140. Further, the biasing member 106 is cylindrical and is accommodated in the accommodation hole 147 of the through-member 140. On the inner peripheral surface of the housing 110, a convex portion 114 protruding radially inward is formed, and the convex portion 114 is inserted into the slit 148 of the through-member 140 to restrict the movement of the biasing member 106 toward the tip side. Therefore, according to the opening / closing mechanism 100 of the present embodiment, the biasing member 106 can be disposed within the through-member 140, and the overall length of the device can be shortened as compared with a configuration in which the biasing member 106 is installed between the hemostatic valve 120 and the through-member 140.

[0041] A-5. Configuration of the fixing mechanism 200 for the long medical device: Next, the configuration of the fixing mechanism 200 will be described. FIGS. 12 to 17 are explanatory views showing the configuration of the fixing mechanism 200 in the present embodiment. FIGS. 12 and 13 show the longitudinal section (YZ section) thereof, FIGS. 14 and 15 show the external perspective view thereof, and FIGS. 16 and 17 show the plane (XY plane) thereof. FIGS. 12, 14, and 16 show the fixing mechanism 200 (hereinafter referred to as the "released state fixing mechanism 200n") in a state where the fixing of a long medical device such as the guide wire GW is released, and FIGS. 13, 15, and 17 show the fixing mechanism 200 (hereinafter referred to as the "fixed state fixing mechanism 200f") in a state where the long medical device is fixed.

[0042] The fixing mechanism 200 is a mechanism for fixing or releasing the fixing of a long medical device inserted into the lumen 13 (FIG. 1) of the medical connector 10. In the fixing mechanism 200 of the present embodiment, each time a sliding operation is performed by an operator on the power applying member 270, the state switches between a fixed state in which the long medical device is fixed and a fixed release state in which the fixing of the long medical device is released. The fixing mechanism 200 includes a housing 210, a shaft member 230, a circular tubular body 220, at least two valve levers 240, an elastic body 250, and a power applying member 270.

[0043] As shown in FIGS. 12 and 13, the housing 210 is a substantially cylindrical member and is formed of, for example, resin. The entire surface of the proximal end of the housing 210 serves as the proximal end side opening 211, and a relatively small-diameter distal end side opening 212 is formed at the distal end of the housing 210. In FIGS. 14 to 17, the illustration of the housing 210 is omitted.

[0044] FIG. 18 is a perspective view showing the external configuration of the shaft member 230. The shaft member 230 is a tubular member in which a lumen 233 extending from the distal end to the proximal end is formed, and is formed of, for example, resin. As shown in FIGS. 12 and 13, the shaft member 230 is housed in the housing 210 with its distal end portion protruding distally from the distal end side opening 212 of the housing 210. In the shaft member 230, the lumen 233 extends in the front-rear direction (Z-axis direction).

[0045] A flange portion 231 protruding in the outer circumferential direction is formed at the proximal end portion of the shaft member 230. The proximal end side surface of the flange portion 231 is in contact with the proximal end side surface of the distal end side portion 110D (see FIG. 1) of the housing 110 of the opening / closing mechanism 100. Further, a slit hole 234 communicating the outer circumferential surface and the lumen 233 is formed in the shaft member 230. In the present embodiment, four slit holes 234 are formed in the shaft member 230 and are arranged substantially evenly in the circumferential direction. Each slit hole 234 extends from a position slightly on the proximal end side from the distal end of the shaft member 230 to in front of the flange portion 231 along the front-rear direction. Inside each slit hole 234, a support portion 235 extending in a direction substantially orthogonal to the front-rear direction (the X-axis direction or the Y-axis direction in the present embodiment) so as to connect between two opposing side walls of the slit hole 234 is formed. The cross-sectional shape orthogonal to the extending direction of the support portion 235 is substantially semi-circular (see FIGS. 12 and 13).

[0046] FIG. 19 is a perspective view showing the external configuration of the circular tubular body 220. The circular tubular body 220 is a flexible circular tubular member in which a through hole 227 into which a long medical device such as a guide wire GW is inserted is formed, and is formed of an elastic material such as silicone rubber, for example. The circular tubular body 220 has a circular tubular main body portion 222 extending in the front-rear direction, and flange portions 221 disposed at both ends of the main body portion 222 and having an outer diameter larger than that of the main body portion 222.

[0047] As shown in FIGS. 12 to 15, the circular tubular body 220 is accommodated in the lumen 233 of the shaft member 230 in a posture such that its axis is parallel to the front-rear direction (Z-axis direction). More specifically, the main body portion 222 of the circular tubular body 220 is accommodated in the lumen 233, and the flange portions 221 at both ends of the circular tubular body 220 protrude outward from the front and rear of the lumen 233. The through hole 227 in the circular tubular body 220 is coaxial with the lumen 233. Further, the through hole 227 constitutes a part of the lumen 13 (see FIG. 1). The front-rear direction (Z-axis direction) is an example of the first direction in the claims.

[0048] FIG. 20 is a perspective view showing the external configuration of the valve lever 240. The valve lever 240 is a member for fixing a long medical device such as a guide wire GW, and is formed of resin, for example. As shown in FIGS. 12 to 17, the fixing mechanism 200 includes a total of four valve levers 240, namely, a pair of valve levers 240 (first valve levers 240A) disposed to face each other in the Y-axis direction with the circular tubular body 220 interposed therebetween, and a pair of valve levers 240 (second valve levers 240B) disposed to face each other in the X-axis direction with the circular tubular body 220 interposed therebetween.

[0049] As shown in FIG. 20, each valve lever 240 has, for example, a lever portion 241 having a substantially disc shape and a pointed convex claw portion 242. Further, each valve lever 240 is formed with a support recess 245 with which the support portion 235 of the shaft member 230 engages.

[0050] As shown in FIGS. 12 to 17, each valve lever 240 is supported by a support portion 235 of the shaft member 230 so as to be rotatable about the support portion 235 of the shaft member 230 within a slit hole 234 of the shaft member 230. In a state where each valve lever 240 is supported by the support portion 235, a lever portion 241 of each valve lever 240 is formed so as to protrude toward the outer peripheral side. Further, a claw portion 242 of each valve lever 240 is provided at a position where it can interfere with the tubular body 220 through the slit hole 234 of the shaft member 230 as the valve lever 240 rotates about the support portion 235. More specifically, each valve lever 240 rotates about the support portion 235, so that, as shown in FIGS. 12, 14, and 16, a non-interference state S1 in which the claw portion 242 is separated from the tubular body 220 and does not interfere with the tubular body 220, and, as shown in FIGS. 13, 15, and 17, an interference state S2 in which the claw portion 242 interferes with the tubular body 220 and elastically deforms the tubular body 220 so that the inner diameter of the through hole 227 of the tubular body 220 becomes smaller. The state switches between the two. When each valve lever 240 is in the interference state S2, since the tubular body 220 elastically deforms and the inner diameter of the through hole 227 becomes smaller, the inner peripheral surface of the tubular body 220 is pressed against a long medical device such as a guide wire GW inserted through the through hole 227. As a result, the long medical device is fixed and sliding in the front-rear direction is restricted. The non-interference state S1 is an example of the first state in the claims, and the interference state S2 is an example of the second state in the claims.

[0051] As described above, the fixing mechanism 200 of the present embodiment includes a pair of first valve levers 240A arranged to face each other in the Y-axis direction, and a pair of second valve levers 240B arranged to face each other in the X-axis direction. In the pair of first valve levers 240A and the pair of second valve levers 240B, the positions of the claw portions 242 in the interference state S2 are different from each other along the front-rear direction. Specifically, the positions of the claw portions 242 of the pair of first valve levers 240A in the interference state S2 are on the tip side of the positions of the claw portions 242 of the pair of second valve levers 240B in the interference state S2. Such a configuration can be realized by making the formation positions of the claw portions 242 different between the first valve lever 240A and the second valve lever 240B. By adopting such a configuration, the claw portions 242 of the valve lever 240 can be made to interfere with the tubular body 220 at two positions separated in the front-rear direction, and more reliable fixing of the long medical device can be realized. Further, as shown in FIG. 17, each of the claw portions 242 of the pair of first valve levers 240A has a tapered surface that faces each other substantially in parallel in the interference state S2. By sandwiching from both sides with the tapered surfaces of the respective claw portions 242 of the pair of first valve levers 240A, more reliable fixing of the long medical device is realized. This also applies to the pair of second valve levers 240B.

[0052] As shown in FIG. 20, each valve lever 240 is formed with a recess 244 that opens toward the outer peripheral side. As shown in FIGS. 12 to 15, an elastic body 250 is engaged with the recess 244 of each valve lever 240. The elastic body 250 is a ring-shaped member and is formed of an elastic material such as rubber. The elastic body 250 is arranged so as to surround the outer periphery of the shaft member 230 and is engaged with the recess 244 of each valve lever 240 in a tensioned state. Therefore, the elastic body 250 holds each valve lever 240 in the non-interference state S1 or the interference state S2. That is, as shown in FIG. 12, when the elastic body 250 is located on the tip side of the support portion 235 of the shaft member 230 that supports each valve lever 240, each valve lever 240 is held in the non-interference state S1 by the tension of the elastic body 250. When each valve lever 240 rotates from this state and the elastic body 250 moves to the base end side of the support portion 235 of the shaft member 230, the tension of the elastic body 250 promotes the rotation of each valve lever 240 toward the interference state S2, and each valve lever 240 is held in the interference state S2 after becoming the interference state S2. Conversely, when each valve lever 240 rotates from this state and the elastic body 250 moves to the tip side of the support portion 235 of the shaft member 230, the tension of the elastic body 250 promotes the rotation of each valve lever 240 toward the non-interference state S1, and each valve lever 240 is held in the non-interference state S1 after becoming the non-interference state S1. When each valve lever 240 is in the interference state S2, the inner diameter of the through hole 227 of the tubular body 220 is reduced by the interference of each valve lever 240, and the long medical device inserted through the through hole 227 is fixed. The fixing force at this time can be adjusted by adjusting the tension of the elastic body 250.

[0053] As shown in FIGS. 12 and 13, the power applying member 270 is a substantially cylindrical member, for example, formed of resin. The power applying member 270 is housed in the housing 210 so as to be slidable in the front-rear direction. A part of the power applying member 270 in the circumferential direction extends so as to project toward the proximal end side of the housing 210, and a flange portion 272 projecting in the outer circumferential direction is formed at the proximal end of that part. The flange portion 272 is a part that receives an operation of sliding the power applying member 270 by a technician such as a doctor. Note that FIGS. 14 to 17 omit the illustration of the power applying member 270.

[0054] A double wall portion 273 that sandwiches the lever portion 241 of each valve lever 240 is formed at the tip of the power applying member 270. Therefore, by sliding the power applying member 270 in the front-rear direction, it can interfere with the lever portion 241 and rotate each valve lever 240 to switch the state. More specifically, as shown in FIG. 12, when the power applying member 270 is at the tip side position P2 on the relatively tip side, each valve lever 240 is in the non-interference state S1. Further, as shown in FIG. 13, when the power applying member 270 is at the base end side position P1 that is more proximal than the tip side position P2, each valve lever 240 is in the interference state S2. The tip side position P2 is an example of the second position in the claims, and the base end side position P1 is an example of the first position in the claims.

[0055] A-6. Operation of the fixing mechanism 200 of the long medical device Next, the operation of the fixing mechanism 200 will be described. In the initial state, as shown in FIG. 12, the power applying member 270 is located at the tip side position P2. In this state, as shown in FIGS. 12, 14, and 16, each valve lever 240 is in the non-interference state S1 where it does not interfere with the tubular body 220, and a long medical device such as a guide wire GW inserted through the through hole 227 of the tubular body 220 is not fixed. That is, the fixing mechanism 200 is in the released state fixing mechanism 200n.

[0056] For example, when an operator who grips the medical connector 10 applies an operation of pressing the power applying member 270 toward the proximal end side (hereinafter referred to as "fixing operation"), the power applying member 270 slides from the distal end side position P2 toward the proximal end side. When the power applying member 270 slides from the distal end side position P2 toward the proximal end side, a load that moves toward the proximal end side is applied to the lever portion 241 of each valve lever 240 sandwiched between the double wall portions 273 of the power applying member 270. As a result, each valve lever 240 rotates with the support portion 235 of the shaft member 230 as a fulcrum against the tension of the elastic body 250. Along with this rotation, when the elastic body 250 engaged with the recess 244 of each valve lever 240 moves to the proximal end side from the position of the support portion 235, the rotation of each valve lever 240 toward the interference state S2 is promoted by the tension of the elastic body 250, and each valve lever 240 is held in the interference state S2 after reaching the interference state S2 (FIGS. 13, 15, and 17). In this state, the inner diameter of the through hole 227 of the cylindrical body 220 is reduced by the interference of each valve lever 240, and the long medical device inserted through the through hole 227 is fixed. As a result, the fixing mechanism 200 becomes the fixed state fixing mechanism 200f. At this time, the power applying member 270 is located at the proximal end side position P1.

[0057] Also, when the fixing mechanism 200 is in the fixed state fixing mechanism 200f, if an operator applies an operation of pressing the power applying member 270 toward the tip side, which is opposite to the fixing operation (hereinafter referred to as "fixing release operation"), the power applying member 270 slides from the base end side position P1 toward the tip side. When the power applying member 270 slides from the base end side position P1 toward the tip side, a load that moves toward the tip side is applied to the lever portion 241 of each valve lever 240 sandwiched between the double wall portions 273 of the power applying member 270. As a result, each valve lever 240 rotates with the support portion 235 of the shaft member 230 as a fulcrum against the tension of the elastic body 250. Along with this rotation, when the elastic body 250 engaged with the concave portion 244 of each valve lever 240 moves to the tip side of the support portion 235, the rotation of each valve lever 240 toward the non-interference state S1 is promoted by the tension of the elastic body 250, and after each valve lever 240 reaches the non-interference state S1, it is held in the non-interference state S1 (FIGS. 12, 14, and 16). In this state, since each valve lever 240 does not interfere with the circular tubular body 220, the inner diameter of the through hole 227 returns to its original size due to the elastic restoring force of the circular tubular body 220, and the fixation of the long medical device inserted through the through hole 227 is released. As a result, the fixing mechanism 200 becomes the fixed state fixing mechanism 200f. At this time, the power applying member 270 is located at the tip side position P2.

[0058] Thus, every time an operation of sliding the power applying member 270 to the base end side or the tip side (fixing operation and fixing release operation) is performed, the state of the fixing mechanism 200 switches between the released state fixing mechanism 200n and the fixed state fixing mechanism 200f. At this time, the operator can easily grasp whether the fixing mechanism 200 is in the fixing release state or the fixed state by visually recognizing the position of the power applying member 270 in the front-rear direction. Also, when sliding the power applying member 270, since the force required to slide the power applying member 270 clearly changes before and after the elastic body 250 exceeds the position of the support portion 235, the operator can easily grasp whether the fixing operation or the fixing release operation has been correctly performed by touch.

[0059] A-7. Technical Effects of the Fixing Mechanism 200 for a Long Medical Instrument: As described above, in the fixing mechanism 200, by sliding the power applying member 270 from the tip side position P2 to the base end side position P1 along the front-rear direction which is the extending direction of the circular tubular body 220, each valve lever 240 can be switched from the non-interference state S1 where it does not interfere with the circular tubular body 220 to the interference state S2 where it interferes with the circular tubular body 220. Thereby, the inner diameter of the through hole 227 of the circular tubular body 220 is reduced by being pressed by the claw portions 242 of each valve lever 240, and the long medical instrument can be fixed. At this time, due to the tension of the elastic body 250, each valve lever 240 is held in the interference state S2, so that the state where the long medical instrument is fixed is maintained. Also, by sliding the power applying member 270 from the base end side position P1 to the tip side position P2 along the front-rear direction, each valve lever 240 can be switched from the interference state S2 to the non-interference state S1, whereby the interference of the claw portions 242 of each valve lever 240 with the circular tubular body 220 is released, and the fixed state of the long medical instrument is released. At this time, due to the tension of the elastic body 250, each valve lever 240 is held in the non-interference state S1, so that the state where the fixing of the long medical instrument is released is maintained. Therefore, according to the fixing mechanism 200 of the present embodiment, the operation of sliding the power applying member 270, which is an easier operation compared to the conventional operation of rotating a screw, can realize the fixing and release of the long medical instrument, and since the fixing condition of the long medical instrument can be grasped by touch and vision, the operability of the fixing mechanism 200 can be improved.

[0060] Also, the fixing mechanism 200 includes a plurality of pairs of two valve levers 240 facing each other with the circular tubular body 220 interposed therebetween, and the positions of the claw portions 242 in the interference state S2 in each pair of valve levers 240 are different from each other along the front-rear direction. Therefore, according to the fixing mechanism 200, the long medical instrument can be fixed at a plurality of positions along the front-rear direction in the circular tubular body 220 by the claw portions 242 of the plurality of pairs of valve levers 240, and the fixing of the long medical instrument can be made more reliable.

[0061] B. Modification Examples: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified into various forms without departing from the gist thereof. For example, the following modifications are also possible.

[0062] The configurations of the medical connector 10, the opening / closing mechanism 100, and the fixing mechanism 200 in the above-described embodiments are merely examples, and can be variously modified. For example, in the above-described embodiment, the fixing mechanism 200 includes four valve levers 240, but the number of valve levers 240 included in the fixing mechanism 200 can be modified to any number as long as it is two or more.

[0063] In the above-described embodiment, the housing 110 of the opening / closing mechanism 100 is composed of three parts (the tip-side part 110D, the middle part 110M, and the base-end side part 110P), but the housing 110 may be composed of two or less parts, or may be composed of four or more parts. Similarly, in the above-described embodiment, the penetrating member 140 of the opening / closing mechanism 100 is composed of three parts (the tip-side part 140D, the middle part 140M, and the base-end side part 140P), but the penetrating member 140 may be composed of two or less parts, or may be composed of four or more parts.

[0064] In the above-described embodiment, the biasing member 106 of the opening / closing mechanism 100 is housed in the housing hole 147 of the housing 110, but the biasing member 106 may be arranged at other positions.

[0065] The dimensions and materials of each member in the above-described embodiments are merely examples, and can be variously modified.

[0066] In the above-described embodiment, the medical connector 10 includes both the opening / closing mechanism 100 and the fixing mechanism 200, but the medical connector 10 may include only one of the opening / closing mechanism 100 and the fixing mechanism 200.

Explanation of Reference Numerals

[0067] 10: Medical Connector 11: Main pipe section 12: Branch pipe section 13: Lumen 14: Lumen 20: Rotator 40:Motion restriction groove 40A: Closed position part 40B: First top part 40C: Open holding part 40D: 2nd top 100: Opening and closing mechanism 102: Ring member 106: biasing member 108: Lid component 110: Housing 110D: Distal part 110M: Middle part 110P: Proximal part 111: Proximal opening 112: Distal opening 113: Lumen 114: protruding portion; 115: flange portion; 116: first wall portion 117: second wall portion 118: storage space 120: Hemostasis valve 121: Slit 122: Through hole 127: Main body 128: Convex 140: Penetrating member 140D: Distal part 140M: Middle part 140P: Proximal part 142: Through hole 144: Tip portion 145: Flange portion 147: Receiving hole 148: Slit 160: Ring pin 161: Main body 162: Pin 200:Fixing mechanism 200f: Fixed state fixing mechanism 200n: Released state fixing mechanism 210: Housing 211: Base end opening 212: Tip end opening 220: Circular tubular body 221: flange portion 222: main body portion 227: through hole 230: Shaft member 231: flange portion 233: lumen 234: slit hole 235: Support part 240: Valve lever 241: Lever portion 242: Claw portion 244: Recessed portion 245: Support recess 250: Elastomer 260: Holding mechanism 270: Power imparting member 272: Flange portion 273: Double wall portion 300: Joint member GC: Guiding catheter GW: Guide wire

Claims

1. A closing and opening mechanism for a hemostatic valve, comprising: a tubular housing having a lumen formed therein that communicates with a distal opening and a proximal opening; a hemostatic valve mounted within the housing, which is normally in a closed state and forms a through hole that communicates with the distal opening of the housing when pressed from the proximal side, and is in an open state; a through member that is accommodated within the housing so as to be slidable along a first direction that is the extending direction of the lumen on the proximal side of the hemostatic valve, and has a through hole formed therein, and can be positioned at a first position for closing the hemostatic valve and a second position that is displaced distally along the first direction from the first position, and is a second position for pressing the hemostatic valve to bring the hemostatic valve into the open state and communicating the through hole of the hemostatic valve with the through hole of the through member; a ring pin having a ring-shaped main body portion surrounding the outer peripheral surface of the through member and a pin portion protruding radially inward from the main body portion, and is accommodated within the housing in a state where movement in the first direction is restricted on the proximal side of the hemostatic valve and rotation around the first direction is permitted; a biasing member for biasing the through member toward the proximal side; and is provided with: An operation restricting groove that is continuous in one circumference is formed on the surface of the through member; The pin portion of the ring pin is loosely fitted in the operation restricting groove; In the operation restricting groove, when the through member is in a first state at the first position, there is a closed position portion into which the pin portion fits without restricting the movement of the through member toward the distal side, and when the through member reaches a second state where it is at a position more distal than the second position from the first state, there is a first top portion into which the pin portion fits without restricting the movement of the through member toward the proximal side, and when the through member is displaced to the second position by the biasing force of the biasing member from the second state to a third state, there is an open holding portion into which the pin portion fits so as to restrict the movement of the through member toward the proximal side, and when the through member reaches a fourth state where it is at a position more distal than the second position from the third state, there is a second top portion into which the pin portion fits without restricting the movement of the through member toward the proximal side; A closing and opening mechanism for a hemostatic valve.

2. The closing and opening mechanism for a hemostatic valve according to Claim 1, wherein: A hollow annular accommodation hole extending in the first direction is formed on the outer peripheral side of the through hole in the through member; On the outer peripheral surface of the through member, a slit is formed that extends in the first direction and communicates with the accommodation hole. The biasing member is cylindrical and is accommodated in the accommodation hole of the through member. On the inner peripheral surface of the housing, a convex portion that protrudes radially inward is formed, and the convex portion is inserted into the slit of the through member to restrict the movement of the biasing member toward the tip side. Opening / closing mechanism of a hemostatic valve.

3. The opening / closing mechanism of the hemostatic valve according to claim 1 or claim 2, A fixing mechanism for a long medical device, A medical connector comprising the same.

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