Hemostasis valve opening and closing mechanism

Abstract

Through the present invention, operability of an opening / closing mechanism is enhanced. The opening / closing mechanism comprises a housing, a hemostasis valve, a through-member, an operating member, a force transmission mechanism, and a holding mechanism. The through-member can be positioned in a first position for placing the hemostasis valve in a closed state, and a second position for pressing on the hemostasis valve to place the hemostasis valve in an open state, along a first direction in which a lumen of the housing extends. The operating member is capable of sliding along a second direction not parallel to the first direction. The force transmission member is disposed so as to be able to slide between the through-member and the operating member in the second direction, and can be positioned in a third position for placing the through-member in the first position, and a fourth position for pressing on the through-member to place the through-member in the second position. Each time that the operating member slides along the second direction, the holding mechanism is switched to a state in which the force transmission member is held in the third position or a state in which the force transmission member is held in the fourth position.

Description

[Technical field]

[0001] The technology disclosed in this specification relates to an opening and closing mechanism for a hemostasis valve, a fixing mechanism for an elongated medical device, and a medical connector. [Background technology]

[0002] A Y connector is a medical connector that is connected to a guiding catheter. The Y connector has a main tube and a branch tube branched from the main tube, and a long medical device such as a guidewire or catheter is introduced into the guiding catheter through the main tube, and a liquid such as a contrast medium or saline is supplied through the branch tube. 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 tube, and a fixing mechanism for fixing the long medical device.

[0003] The opening and closing mechanism of the hemostatic valve in a conventional Y connector is provided with a penetrating member (opener) with a through hole coaxial with the lumen of the main tube, and by pressing the penetrating member in a direction parallel to the axial direction of the lumen of the main tube, it is possible to switch between an open state in which the penetrating member presses against the hemostatic valve and opens the hemostatic valve, and a closed state in which the penetrating member moves away from the hemostatic valve and closes the hemostatic valve (see, for example, Patent Document 1). In addition, the fixing mechanism for long medical devices in conventional Y connectors is provided with an elastic fixed valve with a through hole through which the long medical device is inserted, and by rotating the screw to move it in the axial direction and thereby moving the pusher in the axial direction, the fixed valve is pressed by the pusher and elastically deformed, reducing the inner diameter of the through hole of the fixed valve to fix the long medical device, and switching between an unlocked state in which the fixed valve is not pressed by the pusher, the inner diameter of the through hole of the fixed valve expands, and the fixation of the long medical device is released (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5249049 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional Y connector configuration, the operation of opening and closing the hemostatic valve is difficult because it requires pressing the penetrating member in the axial direction of the lumen of the main tube. In addition, in the above-mentioned conventional Y connector configuration, the operation of fixing / unfixing the long medical device is performed by rotating a screw, which is complicated and there is a problem that the degree of fixation of the long medical device cannot be grasped by touch or visually.

[0006] This specification discloses a technique that can solve the above-mentioned problems. [Means for solving the problem]

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

[0008] (1) The opening / closing mechanism of a hemostatic valve disclosed in this specification comprises a housing, a hemostatic valve, a penetrating member, an operating member, a force transmission member, and a holding mechanism. The housing is a tubular member having a lumen formed therein that communicates with a tip-side opening and a base-side opening. The hemostatic valve is attached within the housing and is normally in a closed state. When pressed from the base-side, the hemostatic valve is in an open state in which a through hole communicating with the tip-side opening of the housing is formed. The penetrating member is accommodated within the housing on the base-side side of the hemostatic valve so as to be slidable along a first direction which is the extension direction of the lumen. The penetrating member has a through hole formed therein that communicates with the base-side opening of the housing. The penetrating member may be located at a first position where the hemostatic valve is in the closed state, and at a second position that is a distal end side in the first direction from the first position and where the hemostatic valve is pressed to open the hemostatic valve and communicate the through hole of the hemostatic valve with the through hole of the penetrating member. The operating member is a member that is slidable along a second direction that is non-parallel to the first direction. The force transmitting member is a member that is slidably disposed between the penetrating member and the operating member in the second direction and transmits to the penetrating member a force that moves the operating member toward the penetrating member along the second direction. The force transmitting member may be located at a third position where the penetrating member is located at the first position, and at a fourth position where the penetrating member is pressed to locate it at the second position. The holding mechanism is a mechanism that switches between a state in which the force transmission member is held in the third position or a state in which the force transmission member is held in the fourth position each time the operating member slides along the second direction.

[0009] In this manner, in the opening / closing mechanism, each time the operating member slides along the second direction, the holding mechanism switches to a state in which the force transmission member is held at the third position or a state in which the force transmission member is held at the fourth position. When the holding mechanism switches to a state in which the force transmission member is held at the fourth position in response to the sliding of the operating member, the penetrating member moves from the first position to the second position, and the hemostasis valve switches from a closed state to an open state. At this time, the holding mechanism holds the force transmission member at the fourth position, thereby maintaining the open state of the hemostasis valve. Furthermore, when the operating member slides again in response to the holding mechanism switching to a state in which the force transmission member is held at the third position, the penetrating member moves from the second position to the first position, and the hemostasis valve switches from an open state to a closed state. At this time, the holding mechanism holds the force transmission member at the third position, thereby maintaining the closed state of the hemostasis valve. Furthermore, in this opening / closing mechanism, the operating member is slidable along a second direction non-parallel to the extension direction of the lumen of the housing, and therefore the operation of opening and closing the hemostatic valve is an operation of pressing the operating member in the second direction non-parallel to the extension direction of the lumen of the housing. Therefore, according to this opening / closing mechanism, the operator can easily open and close the hemostatic valve with his thumb or index finger while holding a device equipped with this opening / closing mechanism, thereby improving the operability of the opening / closing mechanism.

[0010] (2) In the opening and closing mechanism of the hemostasis valve, the operating member and the force transmission member may be configured as an integrated member. According to this opening and closing mechanism of the hemostasis valve, the number of parts can be reduced.

[0011] (3) In the opening / closing mechanism of the hemostatic valve, the holding mechanism may have a cylindrical biasing member that biases the force transmission member toward the outside of the housing along the second direction, either directly or via another member, and a convex portion to be inserted into the hollow portion of the biasing member is formed on a surface of the force transmission member or the other member that faces the biasing member. According to this opening / closing mechanism of the hemostatic valve, positioning between the force transmission member and the biasing member can be easily and accurately performed, and the biasing force of the biasing member can be effectively transmitted to the force transmission member, thereby improving the accuracy of the operation of the opening / closing mechanism.

[0012] (4) In the above-mentioned opening / closing mechanism of the hemostasis valve, the angle between the first direction and the second direction may be configured to be equal to or greater than 35 degrees and equal to or less than 55 degrees. According to this opening / closing mechanism of the hemostasis valve, the operator can extremely easily open and close the hemostasis valve with his thumb while holding a device equipped with this opening / closing mechanism, thereby effectively improving the operability of the opening / closing mechanism.

[0013] (5) In the above-mentioned opening / closing mechanism of the hemostatic valve, the penetrating member may have a main body portion in which the through hole is formed and a flange portion protruding from the main body portion in a third direction perpendicular to the first direction, and the force transmission member may be configured to be slidable relative to the penetrating member along the third direction while abutting against a base-end surface of the flange portion. This opening / closing mechanism of the hemostatic valve can efficiently convert between the sliding of the force transmission member along a second direction non-parallel to the extension direction of the lumen of the housing and the sliding of the penetrating member in the extension direction, thereby effectively improving the operability of the opening / closing mechanism.

[0014] (6) In the above-mentioned opening / closing mechanism of the hemostasis valve, the angle between the first direction and the second direction may be configured to be approximately 90 degrees. According to this opening / closing mechanism of the hemostasis valve, the operator can extremely easily open and close the hemostasis valve with his thumb or index finger while holding a device equipped with this opening / closing mechanism, and the operability of the opening / closing mechanism can be effectively improved.

[0015] (7) In the above-mentioned opening / closing mechanism of the hemostatic valve, the force transmission member may be slidable in the second direction, the penetrating member may have a convex portion protruding in a fourth direction perpendicular to both the first direction and the second direction, and the force transmission member may have a groove into which the convex portion is inserted, the groove extending in a direction perpendicular to the fourth direction and non-parallel to both the first direction and the second direction. This opening / closing mechanism of the hemostatic valve can efficiently convert between the sliding of the force transmission member along the second direction substantially perpendicular to the extension direction of the lumen of the housing and the sliding of the penetrating member in the extension direction, thereby effectively improving the operability of the opening / closing mechanism.

[0016] (8) The fixing mechanism for the long medical instrument disclosed in the present specification includes a housing, a tubular body, a pressing member, an operating member, a force transmission member, and a holding mechanism. The housing is a tubular member having a lumen formed therein that communicates with a distal opening and a proximal opening. The tubular body is a flexible member that is attached to the housing and has a through hole formed therein through which the long medical instrument is inserted. The through hole of the tubular body communicates with the distal opening and the proximal opening of the housing. The pressing member is accommodated in the housing so as to be slidable along a sixth direction perpendicular to a fifth direction parallel to the axis of the tubular body. The pressing member can be positioned at a fifth position and a sixth position displaced from the fifth position along the sixth direction, where a portion of the tubular body excluding both ends is pressed from the outer periphery to deform the tubular body. The operating member is a member that is slidable along a seventh direction that is not parallel to the fifth direction. The force transmission member is disposed between the pressing member and the operating member so as to be slidable in the seventh direction, and transmits to the pressing member a force that moves the operating member toward the pressing member along the seventh direction. The force transmission member can be positioned at a seventh position where the pressing member is positioned at the fifth position, and at an eighth position where the pressing member is pressed to be positioned at the sixth position. The holding mechanism 260 switches between a state where the force transmission member is held at the seventh position, or a state where the force transmission member is held at the eighth position, every time the operating member slides along the seventh direction. The fixing mechanism of the present long medical device is configured such that, when the pressing member is positioned at the sixth position, the inner circumferential surface of the deformed circular tubular body is pressed against the long medical device, thereby fixing the long medical device to the circular tubular body.

[0017] In this manner, in the fixing mechanism for the long medical device, the holding mechanism switches between a state in which the force transmission member is held at the seventh position or a state in which the force transmission member is held at the eighth position, each time the operating member slides along the seventh direction. When the holding mechanism switches to a state in which the force transmission member is held at the eighth position in association with the sliding of the operating member, the pressing member moves from the fifth position to the sixth position, the tubular body elastically deforms, and the long medical device is fixed to the tubular body. At this time, the holding mechanism holds the force transmission member at the eighth position, thereby maintaining the fixed state of the long medical device. Furthermore, when the operating member slides again, the holding mechanism switches to a state in which the force transmission member is held at the seventh position, the pressing member moves from the sixth position to the fifth position, the shape of the tubular body is restored, and the fixation of the long medical device is released. At this time, the holding mechanism holds the force transmission member at the seventh position, thereby maintaining the release of the fixation of the long medical device. Furthermore, in the fixing mechanism for the long medical device, the operating member is slidable along a seventh direction that is non-parallel to the direction parallel to the axis of the tubular body, so that the fixing and unlocking operations for the long medical device are performed by pressing the operating member in the seventh direction that is non-parallel to the direction parallel to the axis of the tubular body. Therefore, according to the fixing mechanism for the long medical device, the operator can fix and unlock the long medical device by an easy operation of pressing the operating member with his / her thumb while holding a device equipped with the fixing mechanism, and the operator can grasp the degree of fixation of the long medical device by touch and vision, improving the operability of the fixing mechanism.

[0018] (9) In the fixing mechanism for the long medical instrument, the holding mechanism may have a cylindrical biasing member that biases the force transmission member in a direction approaching the pressing member, and a convex portion that is inserted into the hollow portion of the biasing member is formed on a surface of the force transmission member that faces the biasing member. This fixing mechanism for the long medical instrument makes it possible to easily and accurately position the force transmission member and the biasing member, and to effectively transmit the biasing force of the biasing member to the force transmission member, thereby improving the accuracy of the operation of the fixing mechanism.

[0019] (10) In the fixing mechanism for the long medical instrument, the angle between the fifth direction and the seventh direction may be 35 degrees or more and 55 degrees or less. According to this fixing mechanism for the long medical instrument, while holding a device having this fixing mechanism, the operation member can be operated extremely easily with the thumb, and the operability of the fixing mechanism can be effectively improved.

[0020] (11) In the fixing mechanism for the long medical instrument, the force transmission member may be configured to be slidable relative to the pressing member along the fifth direction while contacting a surface of the pressing member. This fixing mechanism for the long medical instrument can efficiently convert between the sliding of the force transmission member along the seventh direction and the sliding of the pressing member along the seventh direction, thereby effectively improving the operability of the fixing mechanism.

[0021] (12) Another fixing mechanism for a long medical instrument disclosed in this specification includes a housing, a tubular body, a tip-side connecting part, a base-side connecting part, and a pressing member. The housing is a tubular member having a lumen formed therein that communicates with a tip-side opening and a base-side opening, and capable of accommodating the long medical instrument in the lumen. The tubular body is a flexible tubular body attached to the housing and having a first through hole formed therein through which the long medical instrument is inserted, the first through hole communicating with the tip-side opening and the base-side opening of the housing. The tip-side connecting part connects a tip end of the tubular body to the housing, and has a second through hole formed therein that communicates with the first through hole of the tubular body. The base-side connecting part connects a base end of the tubular body to the housing, and has a third through hole formed therein that communicates with the first through hole of the tubular body. The pressing member is configured to press a pressing portion of the cylindrical body excluding both ends from a direction non-parallel to the axis of the cylindrical body, and is accommodated in the housing. An area of ​​the second through hole in a cross section of the fixing mechanism of the tip-side connecting portion and an area of ​​the third through hole in the cross section of the base-side connecting portion are larger than an area of ​​the first through hole in the cross section of the pressing portion.

[0022] In this manner, in the fixing mechanism for the long medical device, when the pressing member presses the pressing portion of the tubular body excluding both ends, the tubular body is elastically deformed to fix the long medical device to the tubular body. At this time, since the area of ​​the second through hole of the distal connection portion and the area of ​​the third through hole of the proximal connection portion are larger than the area of ​​the first through hole at the pressing portion of the tubular body, even in a state in which the pressing member presses the pressing portion of the tubular body to fix the long medical device, the long medical device is prevented from being pressed against the inner circumferential surfaces of the distal connection portion and the proximal connection portion, and damage to the long medical device can be more effectively prevented.

[0023] The technology disclosed in this specification can be realized in various forms, such as a hemostatic valve opening and closing mechanism, a fixing mechanism for a long medical device, a medical connector equipped with a hemostatic valve opening and closing mechanism and / or a fixing mechanism for a long medical device, a medical device equipped with a medical connector, etc. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is an explanatory diagram showing a configuration of a medical connector according to a first embodiment; [Diagram 2] An explanatory diagram showing the configuration of a medical connector [Diagram 3] FIG. 1 is an explanatory diagram showing the configuration of an opening and closing mechanism of a medical connector. [Figure 4] FIG. 4 is an explanatory diagram showing the configuration of the opening / closing mechanism shown in FIG. 3. [Diagram 5] FIG. 1 is an explanatory diagram showing the configuration of an opening / closing mechanism. [Figure 6] FIG. 2 is a cross-sectional perspective view showing a configuration of a base end side housing portion that constitutes a housing of the opening / closing mechanism. [Figure 7] FIG. 2 is a perspective view showing the external configuration of a penetrating member and a force transmission member of the opening / closing mechanism; [Figure 8] FIG. 2 is a perspective view showing the external configuration of an operating member of the opening / closing mechanism and a holding mechanism; [Figure 9] FIG. 2 is a perspective view showing the external configuration of an outer cylinder of the opening and closing mechanism; [Figure 10]FIG. 13 is an explanatory diagram showing a configuration of a modified example of the opening / closing mechanism of the first embodiment; [Figure 11] FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism in a first embodiment; [Figure 12] FIG. 1 is an explanatory diagram showing a configuration of a fixing mechanism. [Figure 13] FIG. 2 is a cross-sectional perspective view showing the configuration of a cylindrical body, a pressing member, and a force transmission member in the fixing mechanism. [Figure 14] FIG. 13 is an explanatory diagram showing the external configuration of a medical connector according to a second embodiment; [Figure 15] FIG. 15 is an explanatory diagram showing the configuration of the opening and closing mechanism of the medical connector shown in FIG. [Figure 16] FIG. 16 is an explanatory diagram showing the configuration of the opening / closing mechanism shown in FIG. [Figure 17] FIG. 1 is an explanatory diagram showing the configuration of an opening / closing mechanism. [Figure 18] FIG. 13 is a cross-sectional perspective view showing the configuration of a housing of the opening / closing mechanism; [Figure 19] FIG. 2 is a perspective view showing the external configuration of a penetrating member and a force transmission member of the opening / closing mechanism; [Figure 20] FIG. 13 is an explanatory diagram showing a configuration of a modified example of the opening / closing mechanism of the second embodiment; [Figure 21] FIG. 13 is an explanatory diagram showing a vertical cross-sectional configuration of a medical connector according to a third embodiment. [Figure 22] FIG. 22 is an explanatory diagram showing a state in which the fixation of the long medical device is released in the fixing mechanism shown in FIG. 21. [Figure 23] FIG. 22 is an explanatory diagram showing a state in which a long medical device is fixed in the fixing mechanism shown in FIG. 21. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] A. First embodiment: A-1. Medical connector configuration: 1 and 2 are explanatory diagrams showing the configuration of the medical connector in the first embodiment. FIG. 1 shows a schematic external configuration of the medical connector 10, and FIG. 2 shows its longitudinal section (YZ section). The medical connector 10 is a Y connector that is connected to a guiding catheter GC via a rotator 20 for use. In this specification, in the medical connector 10, the side to which the guiding catheter GC is connected (Z-axis positive direction side) is referred to as the tip side, and the opposite side (Z-axis negative direction side) is referred to as the base side. In addition, with respect to the medical connector 10 and each of its components, the tip side end is referred to as the "tip", the tip and its vicinity are referred to as the "tip part", the base side end is referred to as the "base end", and the base end and its vicinity are referred to as the "base end part". In addition, for convenience of explanation, the Z-axis direction is referred to as the front-back direction, the Y-axis direction is referred to as the up-down direction, the Y-axis positive direction is referred to as the up direction, the Y-axis negative direction is referred to as the down direction, and the X-axis direction is referred to as the left-right direction. However, the posture of the medical connector 10 is not limited to this. In addition, in the cross-sectional views below, the side configuration of some components may be omitted.

[0026] The medical connector 10 has a tubular main pipe 11 extending in the front-rear direction, and a tubular branch pipe 12 branching from the vicinity of the tip of the main pipe 11 and extending obliquely upward toward the base end side. A lumen 13 is formed in the main pipe 11, extending in the front-rear direction and penetrating the main pipe 11, and a long medical device (not shown), such as a guidewire or a catheter, is introduced into the guiding catheter GC via the lumen 13. A lumen 14 is formed in the branch pipe 12, which communicates with the lumen 13 of the main pipe 11, and a liquid agent, such as a contrast agent or physiological saline, is supplied via the lumen 14 from a liquid agent supplier (not shown) connected to the end of the branch pipe 12.

[0027] The medical connector 10 includes an opening / closing mechanism 100 for the hemostatic valve and a fixing mechanism 200 for the elongated medical device. The opening / closing mechanism 100 is provided on the base end side of the fixing mechanism 200. The opening / closing mechanism 100 constitutes a part of the base end side of the main pipe portion 11 of the medical connector 10, and the fixing mechanism 200 constitutes a part of the tip end side of the main pipe portion 11 and the branch pipe portion 12 of the medical connector 10. Below, the configurations of the opening / closing mechanism 100 and the fixing mechanism 200 will be described in order.

[0028] The medical connector 10 is used by being held by an operator such as a doctor. For example, the operator holds the main pipe portion 11 of the medical connector 10 in the position shown in Fig. 1 with four fingers from the index finger to the little finger, and holds the medical connector 10 so that the operator's thumb is positioned near the operating member 180 of the opening / closing mechanism 100 or the operating member 280 of the fixing mechanism 200.

[0029] A-2. Opening and closing mechanism configuration: Next, the configuration of the opening / closing mechanism 100 of the hemostasis valve 120 will be described. Figures 3 to 5 are explanatory diagrams showing the configuration of the opening / closing mechanism 100 in the first embodiment. Figure 3 shows a longitudinal section (YZ section), and Figures 4 and 5 show perspective views. Figures 3 and 4 show the opening / closing mechanism 100 in a state in which the hemostasis valve 120 is closed (hereinafter referred to as "closed state opening / closing mechanism 100c"), and Figure 5 shows the opening / closing mechanism 100 in a state in which the hemostasis valve 120 is open (hereinafter referred to as "open state opening / closing mechanism 100o").

[0030] The opening and closing mechanism 100 is a mechanism for opening and closing the hemostatic valve 120 that suppresses the outflow of blood through the lumen 13 of the main tube portion 11 (FIG. 2) of the medical connector 10. The opening and closing mechanism 100 is a mechanism that switches the hemostatic valve 120 between a closed state and an open state every time an operator applies a pressing operation to the operating member 180. The opening and closing mechanism 100 includes a housing 110, a hemostatic valve 120, a penetrating member 130, an operating member 180, a force transmission member 140, and a holding mechanism 160.

[0031] The housing 110 is a tubular member in which a tip end opening 112 and a base end opening 111 are formed, and a lumen 113 is formed which communicates with the tip end opening 112 and the base end opening 111. The lumen 113 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, for example, from a resin. As shown in FIG. 2, a base end portion of a fixing mechanism 200 is inserted and fixed in the lumen 113. The Z-axis direction is an example of a first direction in the claims.

[0032] The housing 110 is composed of a distal housing portion 110D and a proximal housing portion 110P. The distal housing portion 110D and the proximal housing portion 110P are each a tubular member having a lumen extending in the front-rear direction. The proximal end of the distal housing portion 110D is inserted into and fixed to the lumen at the distal end of the proximal housing portion 110P, so that the proximal housing portion 110P and the distal housing portion 110D are integrated to form the housing 110. A substantially flat partition wall 114 that is substantially perpendicular to the front-rear direction is formed by the wall at the proximal end of the distal housing portion 110D in the vicinity of the center in the front-rear direction inside the housing 110. The partition wall 114 is formed with a through hole 114A that penetrates the partition wall 114 in the front-rear direction and forms a part of the lumen 113. The cross-sectional shape of the through hole 114A is, for example, substantially circular. It should be noted that the distal housing portion 110D is not shown in FIGS.

[0033] 6 is a cross-sectional perspective view showing the configuration of the base-side housing part 110P constituting the housing 110 in the first embodiment. A guide groove 115 extending in the front-rear direction is formed on the inner side surface of the base-side housing part 110P. A pair of guide grooves 115 are formed to face each other in the left-right direction (X-axis direction). In addition, a member accommodating space 116 is formed at the base end part inside the base-side housing part 110P, which communicates with the lumen 113, extends obliquely downward toward the base end side, and opens to the surface of the base-side housing part 110P.

[0034] As shown in Figs. 3 to 5, the hemostatic valve 120 is a substantially disk-shaped member and is made of an elastic material such as silicone rubber. The hemostatic valve 120 is fixed inside the housing 110 at a position on the distal side of the partition wall 114. A slit 121 is formed at a substantially central position of the hemostatic valve 120 as viewed in the Z-axis direction (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. 3 and 4). When the hemostatic valve 120 is in a closed state, the lumen 113 is closed by the hemostatic valve 120, and blood outflow from the hemostatic valve 120 to the proximal side through the lumen 113 is suppressed. When the hemostatic valve 120 is pressed from the proximal side, each piece separated by the slit 121 is elastically deformed so as to be displaced toward the distal side, and the hemostatic valve 120 is in an open state in which a through hole 122 penetrating the hemostatic valve 120 in the front-rear direction is formed (Fig. 5). In the open state, the through hole 122 formed in the hemostatic valve 120 communicates with the tip-side opening 112 via 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 remains open. When the pressing force from the base end side is removed, the hemostatic valve 120 elastically deforms and returns to the closed state.

[0035] FIG. 7 is a perspective view showing the external configuration of the penetrating member 130 and the force transmission member 140 in the first embodiment. As shown in FIGS. 3 to 5 and 7, the penetrating member 130 is a member in which a through hole 132 extending in the front-rear direction is formed, and is made of, for example, resin. More specifically, the penetrating member 130 has a substantially cylindrical main body portion 131 in which the through hole 132 extending in the front-rear direction is formed, and a substantially flat flange portion 133 that protrudes downward from near the center in the front-rear direction and is substantially perpendicular to the front-rear direction. A pair of guide protrusions 134 that protrude in the left-right direction are formed on the side surface of the flange portion 133, and a continuous guide protrusion 135 that extends in the up-down direction is formed on the base end side surface of the flange portion 133. The up-down direction is an example of a third direction in the claims.

[0036] The penetrating member 130 is accommodated in the housing 110 on the proximal side of the hemostatic valve 120. In the penetrating member 130, a through hole 132 communicates with the proximal opening 111 of the housing 110. Furthermore, the through hole 132 and the lumen 113 of the housing 110 are coaxial with each other.

[0037] In the penetrating member 130, a pair of guide protrusions 134 (FIG. 7) formed on the flange portion 133 are fitted into a pair of guide grooves 115 (FIG. 6) formed in the housing 110. This allows the penetrating member 130 to slide in the front-rear direction using the guide grooves 115 as a guide, with its position in the up-down and left-right directions relative to the housing 110 being determined. The penetrating member 130 is positioned such that its main body portion 131 faces the through hole 114A of the partition wall 114 in the front-rear direction. The penetrating member 130, which is slidable in the front-rear direction, can be positioned at a pressing position P2 where the tip portion of the main body portion 131 is inserted into the through hole 114A and presses the hemostasis valve 120 to open the hemostasis valve 120, and at a non-pressing position P1 where the hemostasis valve 120 is not pressed and the hemostasis valve 120 is closed. As shown in Fig. 5, when the penetrating member 130 is located at the pressing position P2, the through hole 122 formed in the hemostasis valve 120 and the through hole 132 of the penetrating member 130 communicate with each other. The tip side of the penetrating member 130 can move to a position where the flange portion 133 abuts against the partition wall 114 of the housing 110, and the base end side of the penetrating member 130 can move to a position where the base end of the penetrating member 130 abuts against a convex portion 119 (Figs. 3 and 6) formed at the base end of the housing 110. The pressing position P2 of the penetrating member 130 is an example of a second position in the claims, and the non-pressing position P1 of the penetrating member 130 is an example of a first position in the claims.

[0038] FIG. 8 is a perspective view showing the external configuration of the operating member 180 and the holding mechanism 160 in the first embodiment. As shown in FIG. 3 to FIG. 5 and FIG. 8, the operating member 180 is a substantially cylindrical member extending in a direction (hereinafter referred to as "operation direction D2") that is not parallel to the front-rear direction (Z-axis direction). In this embodiment, the operating direction D2 is a direction that forms an angle of 35 degrees or more and 55 degrees or less with the front-rear direction, for example, a direction that forms an angle of 45 degrees with the front-rear direction, that is, a direction that is obliquely 45 degrees from the upper tip side toward the lower base end side. The operating member 180 is supported by an outer tube 150 of the holding mechanism 160 described later and is slidable along the operating direction D2. A part of the base end side of the operating member 180 is exposed from the outer tube 150, and can be pressed by an operator such as a doctor. The operating member 180 is formed of, for example, resin. The operating direction D2 is an example of a second direction in the claims.

[0039] The force transmission member 140 is a member having a substantially polygonal shape, and is formed of, for example, resin. The distal end surface 143 of the force transmission member 140 is flat and substantially perpendicular to the front-rear direction, and abuts against the base end surface of the flange portion 133 of the penetrating member 130. The distal end surface 143 is formed with a guide groove 144 that extends continuously in the vertical direction. The guide protrusion 135 of the penetrating member 130 is fitted into the guide groove 144. In addition, a recess 145 capable of accommodating the base end portion of the main body portion 131 of the penetrating member 130 is formed on the upper surface of the force transmission member 140. In addition, a protruding protrusion 142 is formed on the surface of the force transmission member 140 on the lower base end side.

[0040] The force transmission member 140 is accommodated in the member accommodating space 116 of the housing 110 so as to be located between the penetrating member 130 and the operating member 180, and is slidable along the operating direction D2. The force transmission member 140 is capable of transmitting to the penetrating member 130 a force that moves the operating member 180 toward the penetrating member 130 along the operating direction D2.

[0041] Because of the above-mentioned configuration, the force transmission member 140 can slide relatively to the penetrating member 130 in the up-down direction while abutting against the base end surface of the flange portion 133 of the penetrating member 130. That is, as shown in Figs. 3 and 4, when the penetrating member 130 is in a non-pressing position P1 where it does not press the hemostatic valve 120, the force transmission member 140 is in a retracted position P3 retracted downward to the base end side. When the force transmission member 140 is in the retracted position P3, the force transmission member 140 does not press the penetrating member 130. When the penetrating member 130 is not pressed by the force transmission member 140, the penetrating member 130 is in the non-pressing position P1. The retracted position P3 of the force transmission member 140 is an example of a third position in the claims.

[0042] 5, when the force transmission member 140 slides obliquely upward from the retracted position P3 along the operation direction D2 and moves to the forward position P4 closer to the penetrating member 130 than the retracted position P3, the force transmission member 140 slides upward relative to the penetrating member 130 while maintaining the state in which the guide protrusion 135 of the penetrating member 130 is engaged with the guide groove 144 of the force transmission member 140, and presses the penetrating member 130 to displace it toward the tip side. When the force transmission member 140 is in the forward position P4, the force transmission member 140 presses the penetrating member 130 to position the penetrating member 130 at the pressing position P2. The forward position P4 is an example of a fourth position in the claims.

[0043] The holding mechanism 160 (FIG. 8) employs a so-called double knock mechanism, and switches between a state in which the force transmission member 140 is held in the retracted position P3 and a state in which the force transmission member 140 is held in the advanced position P4 every time the operating member 180 slides along the operating direction D2. The holding mechanism 160 has an outer cylinder 150, a rotor 170, and a biasing member 162. In this embodiment, a part of the operating member 180 also constitutes a part of the holding mechanism 160.

[0044] FIG. 9 is a perspective view showing the external configuration of the outer cylinder 150 in the first embodiment. The outer cylinder 150 is a substantially cylindrical member, and is formed of, for example, resin. As shown in FIG. 3, the outer cylinder 150 is attached to the tip of the portion of the housing 110 where the member accommodating space 116 is formed, with its axial direction coinciding with the operation direction D2. As shown in FIG. 9, a tooth-shaped outer cylinder end face cam 153 is formed on the inner peripheral surface of the outer cylinder 150. The outer cylinder end face cam 153 is a cam in which shallow groove portions 154 and deep groove portions 155 are alternately formed in the circumferential direction. In this embodiment, the outer cylinder end face cam 153 is composed of four shallow groove portions 154 and four deep groove portions 155.

[0045] A tooth-shaped operating member end cam 182 is formed on the end face of the upper tip side of the approximately cylindrical operating member 180. In addition, a plurality of (four) sliding contacts 181, which are approximately rectangular parallelepiped protrusions, are formed on the outer circumferential surface of the operating member 180. The operating member 180 is inserted into the hollow portion of the outer tube 150, and each sliding contact 181 on the outer circumferential surface of the operating member 180 fits into each deep groove portion 155 on the inner circumferential surface of the outer tube 150. As a result, the operating member 180 is slidable along the axial direction of the outer tube 150, i.e., along the operating direction D2, with its rotation restricted relative to the outer tube 150.

[0046] The rotor 170 is a substantially disk-shaped member, and is made of, for example, resin. A plurality of (four) protrusions 173 are formed on the outer peripheral surface of the rotor 170. Teeth are formed on the surface of the lower base end side of each of the protrusions 173 of the rotor 170. Here, the pitch of the crests of the operation member end face cam 182 of the operation member 180 is shifted by about 1 / 2 of the pitch of the crests of the outer cylinder end face cam 153 of the outer cylinder 150, and each of the protrusions 173 of the rotor 170 cannot be simultaneously engaged with both the operation member end face cam 182 and the outer cylinder end face cam 153. In addition, a recess 174 is formed on the surface of the upper tip side of the rotor 170.

[0047] The biasing member 162 is a substantially cylindrical spring, and is made of a metal such as stainless steel. The biasing member 162 is disposed between the rotor 170 and the force transmission member 140 (FIG. 7), and biases the force transmission member 140 toward the outside of the housing 110 along the operation direction D2. One end of the biasing member 162 is inserted into a recess 174 of the rotor 170, and the protrusion 142 of the force transmission member 140 is inserted into a hollow portion at the other end of the biasing member 162.

[0048] In the rotor retracted state where each of the convex portions 173 of the rotor 170 is fitted into the deep groove portion 155 of the outer cylinder end surface cam 153 of the outer cylinder 150, the rotor 170 is located at a position retracted downward toward the base end side using the deep groove portion 155 as a guide. Therefore, in the rotor retracted state, as shown in Figures 3 and 4, the force transmission member 140 is located at a retracted position P3 retracted downward toward the base end side, and as a result, the penetrating member 130 is located at the non-pressing position P1. The rotor retracted state is maintained as long as the operating member 180 does not slide.

[0049] In the rotor retracted state, when the operating member 180 advances toward the upper tip side along the operating direction D2, the operating member end face cam 182 of the operating member 180 engages with each convex portion 173 of the rotor 170, so that the rotor 170 advances in the same direction together with the operating member 180. When the rotor 170 advances to a position where each convex portion 173 escapes from the deep groove portion 155, each convex portion 173 slides along the tooth profile of the operating member end face cam 182, so that the rotor 170 rotates in the circumferential direction by 1 / 2 of a mountain. As a result, each convex portion 173 and the operating member end face cam 182 are completely engaged with each other. After that, when the operating member 180 retreats toward the lower base end side along the operating direction D2, the rotor 170 retreats in the same direction together with the operating member 180. At this time, since the rotor 170 has rotated by half a peak, each of the projections 173 fits into the shallow groove portion 154, not the deep groove portion 155, of the outer cylinder end face cam 153 of the outer cylinder 150. In the rotor forward state in which each projection 173 fits into the shallow groove portion 154, the rotor 170 is held in a position advanced toward the upper tip side, compared to the rotor backward state in which the projections 173 fit into the deep groove portion 155. Therefore, in the rotor forward state, as shown in FIG. 5, the force transmission member 140 advances to the forward position P4, and as a result, the penetrating member 130 moves to the pressing position P2. The rotor forward state is maintained as long as the operating member 180 does not slide.

[0050] In the rotor forward state, when the operating member 180 advances toward the upper tip side along the operating direction D2, the operating member end face cam 182 engages with each convex portion 173 of the rotor 170, and the rotor 170 advances in the same direction together with the operating member 180. When the rotor 170 advances to a position where each convex portion 173 escapes from the shallow groove portion 154, each convex portion 173 slides along the tooth profile of the operating member end face cam 182, and the rotor 170 rotates in the circumferential direction by 1 / 2 a mountain. As a result, each convex portion 173 and the operating member end face cam 182 are completely engaged with each other. Thereafter, when the operating member 180 retreats toward the lower base end side along the operating direction D2, the rotor 170 retreats in the same direction together with the operating member 180. At this time, since the rotor 170 has rotated by half a peak, each of the projections 173 fits into the deep groove portion 155, not the shallow groove portion 154, of the outer cylinder end face cam 153. As a result, the holding mechanism 160 returns to the rotor retracted state, the force transmission member 140 retracts to the retracted position P3, and the penetrating member 130 moves to the non-pressing position P1. In this way, the holding mechanism 160 switches between a state in which the force transmission member 140 is held at the retracted position P3, or a state in which the force transmission member 140 is held at the advanced position P4, every time the operating member 180 slides along the operating direction D2.

[0051] A-3. Operation of the opening and closing mechanism 100: Next, the operation of the opening / closing mechanism 100 of the hemostasis valve 120 will be described. In the initial state, the holding mechanism 160 is in a rotor retracted state as shown in Figures 3 and 4. In this state, the force transmission member 140 is located at the retracted position P3, and the penetrating member 130 is not pressed by the force transmission member 140 and is located at the non-pressing position P1. Therefore, the hemostasis valve 120 is closed, and the opening / closing mechanism 100 becomes the closed-state opening / closing mechanism 100c.

[0052] For example, when an operation of pressing the operating member 180 toward the inside of the housing 110 (i.e., diagonally upward) along the operating direction D2 (hereinafter referred to as a "valve opening operation") is performed with the thumb of an operator holding the medical connector 10, the operating member 180 slides diagonally upward along the operating direction D2. Accordingly, the holding mechanism 160 switches from the rotor retreat state to the rotor advance state. In this state, as shown in FIG. 5, the force transmission member 140 is located at the advanced position P4, and the penetrating member 130 is pressed by the force transmission member 140 and is located at the pressing position P2. As a result, the tip of the main body 131 of the penetrating member 130 presses the hemostasis valve 120 to open the hemostasis valve 120, and the opening / closing mechanism 100 becomes the open-state opening / closing mechanism 100o.

[0053] Furthermore, when the opening / closing mechanism 100 is in the open state opening / closing mechanism 100o, for example, when an operation of pressing the operating member 180 toward the inside of the housing 110 (i.e., diagonally upward) along the operating direction D2 (hereinafter referred to as "valve closing operation") is applied by the operator's thumb in the same manner as the valve opening operation, the operating member 180 slides diagonally upward along the operating direction D2. Accordingly, the holding mechanism 160 switches from the rotor forward state to the rotor retreat state. In this state, as shown in Figs. 3 and 4, the force transmission member 140 is located at the retreated position P3, and the penetrating member 130 returns to the non-pressing position P1 without being pressed by the force transmission member 140. As a result, the penetrating member 130 does not press the hemostasis valve 120, closing the hemostasis valve 120, and the opening / closing mechanism 100 becomes the closed state opening / closing mechanism 100c.

[0054] In this way, every time the operating member 180 is pressed (valve opening operation or valve closing operation), the state of the opening / closing mechanism 100 is switched to either the closed state opening / closing mechanism 100c or the open state opening / closing mechanism 100o.

[0055] A-4. Technical effect of the opening and closing mechanism: As described above, in the opening / closing mechanism 100, each time the operating member 180 slides along the operating direction D2, the holding mechanism 160 switches to a state in which the force transmission member 140 is held at the retracted position P3 or a state in which the force transmission member 140 is held at the advanced position P4. When the holding mechanism 160 switches to a state in which the force transmission member 140 is held at the advanced position P4, the penetrating member 130 moves from the non-pressing position P1 to the pressing position P2, and the hemostasis valve 120 switches from the closed state to the open state. At this time, the holding mechanism 160 holds the force transmission member 140 at the advanced position P4, thereby maintaining the open state of the hemostasis valve 120. Furthermore, when the operating member 180 slides again, the holding mechanism 160 switches to a state in which the force transmission member 140 is held at the retracted position P3, the penetrating member 130 moves from the pressing position P2 to the non-pressing position P1, and the hemostatic valve 120 switches from the open state to the closed state. At this time, the holding mechanism 160 holds the force transmission member 140 at the retracted position P3, thereby maintaining the closed state of the hemostatic valve 120. In the opening / closing mechanism 100, the operating member 180 is slidable along the operating direction D2 non-parallel to the extension direction (Z-axis direction) of the lumen 113 of the housing 110, so that the opening / closing operation of the hemostatic valve 120 is an operation of pressing the operating member 180 in the operating direction D2 non-parallel to the extension direction of the lumen 113. Therefore, according to the opening and closing mechanism 100, the operator can easily open and close the hemostatic valve 120 with his thumb while holding the medical connector 10, thereby improving the operability of the opening and closing mechanism 100.

[0056] The holding mechanism 160 has a cylindrical biasing member 162 that biases the force transmission member 140 toward the outside of the housing 110 along the operation direction D2, and a convex portion 142 that is inserted into the hollow portion of the biasing member 162 is formed on the surface of the force transmission member 140 that faces the biasing member 162. Therefore, according to the opening and closing mechanism 100, it is possible to easily and accurately position the force transmission member 140 and the biasing member 162, and it is also possible to effectively transmit the biasing force of the biasing member 162 to the force transmission member 140, thereby improving the accuracy of the operation of the opening and closing mechanism 100.

[0057] The angle between the extension direction (Z-axis direction) of the lumen 113 of the housing 110 and the operation direction D2 of the operation member 180 is 35 degrees or more and 55 degrees or less. Therefore, according to the opening and closing mechanism 100, the operator can extremely easily operate the operation member 180 with his / her thumb while holding the medical connector 10, and the operability of the opening and closing mechanism 100 can be effectively improved.

[0058] The penetrating member 130 has a main body 131 in which a through hole 132 is formed, and a flange 133 protruding in the up-down direction from the main body 131, and the force transmission member 140 is configured to be able to slide relatively to the penetrating member 130 along the up-down direction while abutting against the surface of the base end side of the flange 133 of the penetrating member 130. Therefore, according to the opening / closing mechanism 100, it is possible to efficiently convert between the sliding of the force transmission member 140 along the operation direction D2 non-parallel to the extension direction (Z-axis direction) of the lumen 113 of the housing 110 and the sliding of the penetrating member 130 in the extension direction (Z-axis direction), and it is possible to effectively improve the operability of the opening / closing mechanism 100.

[0059] A-5. Modifications of the opening and closing mechanism: FIG. 10 is an explanatory diagram showing the configuration of a modified example (opening / closing mechanism 100X) of the opening / closing mechanism 100 of the first embodiment. The opening / closing mechanism 100X differs from the opening / closing mechanism 100 in that the operating member 180 and the force transmission member 140 are integrated into one member. Specifically, a connecting shaft 147 extends from the surface of the lower base end side of the force transmission member 140 toward the lower base end side, and the connecting shaft 147 passes through a through hole 179 formed in the rotor 170 to reach the operating member 180 and is connected to the operating member 180. Therefore, in the opening / closing mechanism 100X, the operating member 180 and the force transmission member 140 slide integrally along the operating direction D2. In the opening / closing mechanism 100X, the biasing member 162 is disposed between the housing 110 and the tip end surface of the lower part of the flange portion 133 of the penetrating member 130, approximately parallel to the front-rear direction. The biasing member 162 biases the penetrating member 130 toward the base end side, thereby indirectly biasing the force transmission member 140 toward the outside of the housing 110 along the operation direction D2. In the opening / closing mechanism 100X of this modified example as well, every time the operating member 180 slides along the operation direction D2, the holding mechanism 160 switches between a state in which the force transmission member 140 is held at the retracted position P3 or a state in which the force transmission member 140 is held at the advanced position P4. Therefore, the opening / closing mechanism 100X can also improve the operability of the opening / closing mechanism 100X.

[0060] A-6. Configuration of fixation mechanism for long medical devices: Next, the configuration of the fixing mechanism 200 for the long medical device will be described. Figures 11 and 12 are explanatory diagrams showing the configuration. Figures 11 and 12 show the configuration of the longitudinal section (YZ section). Note that Figure 11 shows the fixing mechanism 200 in a state where the fixing of a long medical device such as a guidewire GW is released (hereinafter referred to as "released state fixing mechanism 200n"), and Figure 12 shows the fixing mechanism 200 in a state where a long medical device is fixed (hereinafter referred to as "fixed state fixing mechanism 200f").

[0061] The fixing mechanism 200 is a mechanism for fixing or releasing the long medical device inserted into the lumen 13 of the main tube portion 11 (FIG. 2) of the medical connector 10. The fixing mechanism 200 is a mechanism that switches between a fixed state in which the long medical device is fixed and a released state in which the fixation of the long medical device is released, every time an operator applies a pressing operation to the operating member 280. The fixing mechanism 200 includes a housing 210, a tubular body 290, a pressing member 240, an operating member 280, a force transmission member 230, and a holding mechanism 260.

[0062] The housing 210 is a tubular member in which a tip-side opening 212 and a base-side opening 211 are formed, and a lumen 213 is formed in communication with the tip-side opening 212 and the base-side opening 211. The lumen 213 is a through hole extending in the front-rear direction (Z-axis direction), and constitutes a part of the lumen 13 of the medical connector 10. The housing 210 is formed, for example, from a resin. A branch pipe section 12 is formed at the tip of the housing 210. As shown in FIG. 2, the base end of the housing 210 is inserted into and fixed to the lumen 113 at the tip of the housing 110 of the opening / closing mechanism 100. The base end of the housing 210 restricts the movement of the hemostatic valve 120 toward the tip side.

[0063] A circular tubular body accommodating space 215, which is an expanded diameter portion of the lumen 213, is formed inside the housing 210 near the center in the front-rear direction. A retraction space 214 is formed above the circular tubular body accommodating space 215, which communicates with the center in the front-rear direction. A member accommodating space 216 is formed below the circular tubular body accommodating space 215, which communicates with the center in the front-rear direction, extends obliquely downward toward the base end, and opens to the surface of the housing 210.

[0064] FIG. 13 is a cross-sectional perspective view showing the configuration of the circular tubular body 290, the pressing member 240, and the force transmission member 230 in the first embodiment. The circular tubular body 290 is a flexible circular tubular member having a through hole 291 formed therein, into which a long medical device such as a guide wire GW is inserted. The circular tubular body 290 is formed of an elastic material such as silicone rubber. As shown in FIG. 11 and FIG. 12, the circular tubular body 290 is attached in the circular tubular body accommodating space 215 in such a position that the axis is parallel to the front-rear direction (Z-axis direction). In the circular tubular body 290, the through hole 291 communicates with the tip-end opening 212 and the base-end opening 211 of the housing 210. The through hole 291 and the lumen 213 of the housing 210 are coaxial with each other. The front-rear direction (Z-axis direction) is an example of a fifth direction in the claims.

[0065] The stoppers 220 are attached to both ends of the circular tubular body 290 in a substantially circular tubular shape. Each stopper 220 has a main body 221 having a diameter substantially the same as that of the circular tubular body 290, a first small diameter portion 223 located on the circular tubular body 290 side with respect to the main body 221 and having a smaller diameter than the main body 221, and a second small diameter portion 222 located on the opposite side of the circular tubular body 290 with respect to the main body 221 and having a smaller diameter than the main body 221. The first small diameter portion 223 of each stopper 220 is inserted into a through hole 291 of the circular tubular body 290. In addition, the main body 221 of each stopper 220 is formed with a recess 224 into which a protrusion (not shown) of the housing 210 fits. Each stopper 220 is positioned in the front-rear direction with respect to the housing 210 by the fitting of the protrusion and the recess 224, and as a result, the circular tubular body 290 is positioned in the front-rear direction with respect to the housing 210.

[0066] The pressing member 240 is a member in which a through hole 241 extending in the front-rear direction is formed, and is made of, for example, resin. The pressing member 240 is substantially rectangular parallelepiped, and the length (dimension in the front-rear direction) of the portion above the center position of the through hole 241 is longer than the other portions. The inner diameter of the through hole 241 of the pressing member 240 is substantially the same as the outer diameter of the circular tubular body 290, and the circular tubular body 290 is inserted into the through hole 241. In addition, the lower surface 244 of the pressing member 240 is a substantially flat surface that is substantially perpendicular to the up-down direction, and is provided with a guide protrusion 245 that extends continuously in the front-rear direction.

[0067] The pressing member 240 is accommodated throughout the retraction space 214, the tubular body accommodating space 215, and the member accommodating space 216 of the housing 210. The pressing member 240 is slidable along the vertical direction (Y-axis direction) that is a direction perpendicular to the axial direction (Z-axis direction) of the tubular body 290. The pressing member 240 that is slidable in the vertical direction can be positioned at a non-pressing position P5 where the through hole 241 of the pressing member 240 is coaxial with the through hole 291 of the tubular body 290, as shown in FIG. 11, and at a pressing position P6 displaced upward from the non-pressing position P5, as shown in FIG. 12. When the pressing member 240 is positioned at the non-pressing position P5 (FIG. 11), the pressing member 240 does not substantially press the tubular body 290. The state where no substantial pressing is performed here includes a state in which the inner circumferential surface of through hole 241 of pressing member 240 and the outer circumferential surface of circular tubular body 290 are separated from each other, as well as a state in which the inner diameter of through hole 241 of pressing member 240 is the same as or slightly smaller than the outer shape of circular tubular body 290 before insertion into through hole 241, so that the inner circumferential surface of through hole 241 of pressing member 240 and the outer circumferential surface of circular tubular body 290 are in close contact with each other. The up-down direction (Y-axis direction) is an example of a sixth direction in the claims, and non-pressing position P5 is an example of a fifth position in the claims.

[0068] On the other hand, when the pressing member 240 is located at the pressing position P6 (FIG. 12), the pressing member 240 presses a portion (the central portion in the front-rear direction in this embodiment) of the circular tubular body 290 excluding both ends upward from the outer periphery, elastically deforming the circular tubular body 290. In this state, the inner circumferential surface of the elastically deformed circular tubular body 290 (mainly the contact point CP1 which is the lower portion of the inner circumferential surface of the deformed portion in the circular tubular body 290) is pressed against the long medical device, and the long medical device is supported so as to be sheared by a total of three points, namely the contact point CP1 and the contact point CP2 which is the upper portion of the inner circumferential surface of both ends of the circular tubular body 290 (or the stopper 220), thereby being fixed to the fixing mechanism 200 and sliding in the front-rear direction is restricted. The retraction space 214 of the housing 210 has a sufficient size for the pressing member 240 to deform the tubular body 290 to an extent that the elongated medical device can be fixed. The pressing position P6 is an example of a sixth position in the claims.

[0069] As shown in FIG. 11, the operation member 280 is a substantially cylindrical member extending in a direction (hereinafter referred to as "operation direction D7") that is not parallel to the front-rear direction (Z-axis direction). In this embodiment, the operation direction D7 is a direction that forms an angle of 35 degrees or more and 55 degrees or less with the front-rear direction, for example, a direction that forms an angle of 45 degrees with the front-rear direction (a diagonal direction of 45 degrees from the upper tip side toward the lower base end side). The operation member 280 is supported by an outer tube 250 of the holding mechanism 260 described later, and is slidable along the operation direction D7. A part of the base end side of the operation member 280 is exposed from the outer tube 250, and can be pressed by an operator such as a doctor. The operation member 280 is formed of, for example, resin. The operation direction D7 is an example of a seventh direction in the claims.

[0070] 13, the force transmission member 230 is a substantially polygonal member, and is made of, for example, resin. An upper surface 234 of the force transmission member 230 is a substantially flat surface that is substantially perpendicular to the up-down direction, and is formed with a guide groove 235 that extends continuously in the front-rear direction. A guide protrusion 245 of the pressing member 240 fits into this guide groove 235. In addition, a protruding protrusion 232 is formed on a surface 233 on the lower base end side of the force transmission member 230.

[0071] 11 and 12, the force transmission member 230 is accommodated in the member accommodating space 216 of the housing 210 so as to be located between the pressing member 240 and the operating member 280, and is slidable along the operating direction D7. The force transmission member 230 is capable of transmitting to the pressing member 240 a force that moves the operating member 280 toward the pressing member 240 along the operating direction D7.

[0072] Since the force transmission member 230 has the above-mentioned configuration, it can slide relatively to the pressing member 240 along the front-rear direction (Z-axis direction) while abutting against the lower surface 244 of the pressing member 240. That is, as shown in FIG. 11, when the pressing member 240 is in a non-pressing position P5 where the pressing member 240 does not press the circular tubular body 290, the force transmission member 230 is in a retracted position P7 retracted toward the lower base end side. When the force transmission member 230 is in the retracted position P7, the force transmission member 230 does not press the pressing member 240. In a state where the pressing member 240 is not pressed by the force transmission member 230, the pressing member 240 is located at the non-pressing position P5 due to the elastic restoring force of the circular tubular body 290. The retracted position P7 is an example of a seventh position in the claims.

[0073] 12, when the force transmission member 230 slides obliquely upward from the retracted position P7 along the operation direction D7 and moves from the retracted position P7 to the advanced position P8 closer to the circular tubular body 290, the force transmission member 230 slides toward the tip side relative to the pressing member 240 while maintaining the state in which the guide protrusion 245 of the pressing member 240 is fitted into the guide groove 235 of the force transmission member 230. When the force transmission member 230 is in the advanced position P8, the force transmission member 230 presses the pressing member 240 to position the pressing member 240 at the pressing position P6. The advanced position P8 is an example of the eighth position in the claims.

[0074] The holding mechanism 260 employs a so-called double knock mechanism, and switches between a state in which the force transmission member 230 is held at the retreated position P7 and a state in which the force transmission member 230 is held at the advanced position P8 every time the operating member 280 slides along the operating direction D7. The holding mechanism 260 has an outer tube 250, a rotor 270, and a biasing member 262. In this embodiment, a part of the operating member 280 also constitutes a part of the holding mechanism 260. The configuration of the holding mechanism 260 is similar to that of the holding mechanism 160 of the opening / closing mechanism 100 described above, and therefore a description thereof will be omitted. That is, in the description of the configuration of the holding mechanism 160 of the opening / closing mechanism 100 described above, the outer tube 150 should be read as the outer tube 250, the rotor 170 as the rotor 270, and the biasing member 162 as the biasing member 262.

[0075] A-7. Locking mechanism operation: Next, the operation of the fixing mechanism 200 for the long medical device will be described. In the initial state, as shown in Fig. 11, the holding mechanism 260 is in a rotor retracted state. In this state, the force transmission member 230 is located at the retracted position P7, and the pressing member 240 is not pressed by the force transmission member 230 and is located at the non-pressing position P5. In addition, since the circular tubular body 290 is not elastically deformed, a long medical device such as a guidewire GW inserted into the lumen 213 of the housing 210 (lumen 13 of the main tubular portion 11) is not fixed. In other words, the fixing mechanism 200 is a released state fixing mechanism 200n.

[0076] For example, when the thumb of the operator holding the medical connector 10 is used to press the operating member 280 obliquely upward along the operating direction D7 (hereinafter referred to as the "fixing operation"), the operating member 280 slides obliquely upward along the operating direction D7. Accordingly, the holding mechanism 260 switches from the rotor retreat state to the rotor advance state. In this state, as shown in FIG. 12, the force transmission member 230 is located at the advanced position P8, and the pressing member 240 is pressed by the force transmission member 230 and is located at the pressing position P6. In addition, the circular tubular body 290 is pressed by the pressing member 240 and elastically deforms, thereby fixing the long medical device inserted in the lumen 213 of the housing 210. As a result, the fixing mechanism 200 becomes the fixed state fixing mechanism 200f.

[0077] In addition, when the fixing mechanism 200 is in the fixed state fixing mechanism 200f, for example, when the operator applies an operation of pressing the operating member 280 obliquely upward along the operating direction D7 with the thumb of the operator in the same manner as the fixing operation (hereinafter referred to as the "fixing release operation"), the operating member 280 slides obliquely upward along the operating direction D7. Accordingly, the holding mechanism 260 switches from the rotor forward state to the rotor retreat state. In this state, as shown in FIG. 11, the force transmission member 230 is located at the retreated position P7, the pressing member 240 is not pressed by the force transmission member 230, and returns to the non-pressing position P5 by the elastic restoring force of the circular tubular body 290. In addition, the circular tubular body 290 is not pressed by the pressing member 240 and does not elastically deform, and the fixation of the elongated medical device inserted into the lumen 213 of the housing 210 is released. As a result, the fixing mechanism 200 returns to the released state fixing mechanism 200n.

[0078] In this way, every time a pressing operation (fixing operation or release operation) is performed on the operating member 280, the fixing mechanism 200 is switched to either the released state fixing mechanism 200n or the fixed state fixing mechanism 200f.

[0079] A-8. Technical effect of the fastening mechanism: As described above, in the fixing mechanism 200 of this embodiment, the operating member 280 is slidable along the operating direction D7 non-parallel to the direction parallel to the axis of the circular tubular body 290 (the Z-axis direction), and therefore the fixing operation and the fixing release operation of the long medical device are performed by pressing the operating member 280 in the operating direction D7 non-parallel to the direction parallel to the axis of the circular tubular body 290. Therefore, according to the fixing mechanism 200 of this embodiment, the operator can fix and release the long medical device by an easy-to-operate operation of pressing the operating member 280 with his / her thumb while holding the medical connector 10, and the operator can grasp the degree of fixation of the long medical device by touch and vision, thereby improving the operability of the fixing mechanism 200.

[0080] The holding mechanism 260 has a cylindrical biasing member 262 that biases the force transmission member 230 in a direction approaching the pressing member 240, and a convex portion 232 that is inserted into the hollow portion of the biasing member 262 is formed on the surface facing the biasing member 262. Therefore, according to the fixing mechanism 200 of this embodiment, the positioning between the force transmission member 230 and the biasing member 262 can be easily and accurately performed, and the biasing force of the biasing member 262 can be effectively transmitted to the force transmission member 230, thereby improving the accuracy of the operation of the fixing mechanism 200.

[0081] The angle between the direction parallel to the axis of the tubular body 290 (Z-axis direction) and the operation direction D7 of the operation member 280 is 35 degrees or more and 55 degrees or less. Therefore, according to the fixing mechanism 200 of this embodiment, the operator can extremely easily operate the operation member 280 with his / her thumb while holding the medical connector 10, and the operability of the fixing mechanism 200 can be effectively improved.

[0082] The force transmission member 230 is configured to be able to slide relatively to the pressing member 240 along a direction (Z-axis direction) parallel to the axis of the cylindrical body 290 while abutting against the surface of the pressing member 240. Therefore, according to the fixing mechanism 200 of this embodiment, the sliding movement of the force transmission member 230 along the operation direction D7 and the sliding movement of the pressing member 240 along the up-down direction can be efficiently converted, and the operability of the fixing mechanism 200 can be effectively improved.

[0083] B. Second embodiment: B-1. Medical connector configuration: 14 is an explanatory diagram showing the external configuration of the medical connector 10A in the second embodiment. In the following, among the configurations of the medical connector 10A in the second embodiment, the same configurations as those of the medical connector 10 in the first embodiment described above are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

[0084] The medical connector 10A includes an opening / closing mechanism 300 and a fixing mechanism 200. The configuration of the fixing mechanism 200 included in the medical connector 10A is similar to the configuration of the fixing mechanism 200 included in the medical connector 10 of the first embodiment. Therefore, hereinafter, the opening / closing mechanism 300 included in the medical connector 10A of the second embodiment will be described.

[0085] B-2. Opening and closing mechanism configuration: Figures 15 to 17 are explanatory diagrams showing the configuration of the opening / closing mechanism 300. Figure 15 shows the configuration of the vertical cross section (YZ cross section) of the opening / closing mechanism 300, and Figures 16 and 17 show cross-sectional perspective views of the opening / closing mechanism 300. Note that Figures 15 and 16 show the opening / closing mechanism 300 in a state in which the hemostasis valve 320 is closed (hereinafter referred to as "closed state opening / closing mechanism 300c"), and Figure 17 shows the opening / closing mechanism 300 in a state in which the hemostasis valve 320 is open (hereinafter referred to as "open state opening / closing mechanism 300o").

[0086] The opening / closing mechanism 300 is a mechanism for opening and closing a hemostatic valve 320 that suppresses the outflow of blood through the lumen 13 of the main pipe portion 11 (FIG. 14) of the medical connector 10A. The opening / closing mechanism 300 of this embodiment is a mechanism that switches between a state in which the hemostatic valve 320 is closed and a state in which the hemostatic valve 320 is opened every time an operator applies a pressing operation to the operating member 380. The opening / closing mechanism 300 includes a housing 310, a hemostatic valve 320, a penetrating member 330, an operating member 380, a force transmission member 340, and a holding mechanism 360.

[0087] 18 is a cross-sectional perspective view showing the configuration of a housing 310 in the second embodiment. The housing 310 is a tubular member in which a tip-side opening 312 and a base-side opening 311 are formed, and in which a lumen 313 is formed that communicates with the tip-side opening 312 and the base-side opening 311. The lumen 313 formed in the housing 310 is a through-hole that extends 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 10A. The housing 310 is made of, for example, resin. The Z-axis direction is an example of a first direction in the claims.

[0088] A substantially flat partition wall 314 is formed near the center of the interior of the housing 310 in the front-rear direction, and is substantially perpendicular to the front-rear direction. The partition wall 314 is formed with a through-hole 314A that penetrates the partition wall 314 in the front-rear direction and constitutes a part of the lumen 313. The cross-sectional shape of the through-hole 314A is, for example, substantially circular. Furthermore, a member accommodating space 316 that extends in the up-down direction is formed on the proximal side of the partition wall 314 inside the housing 310. The member accommodating space 316 opens to the surface of the housing 110 at an upper part of the housing 110.

[0089] The hemostasis valve 320 is a member having the same configuration as the hemostasis valve 120 of the first embodiment. The hemostasis valve 320 is fixed at a position distal to the partition wall 314 inside the housing 310. The hemostasis valve 320 is normally in a closed state in which the slit 321 is closed and the valve is closed (FIGS. 15 and 16). When the hemostasis valve 320 is pressed from the base end side, it is in an open state in which a through hole 322 penetrating the hemostasis valve 320 in the front-rear direction is formed (FIG. 17). When the pressing force from the base end side is removed, the hemostasis valve 320 is elastically deformed and returns to the closed state. In this embodiment, a substantially annular boss 328 is disposed between the hemostasis valve 320 and the partition wall 314 of the housing 310.

[0090] FIG. 19 is a perspective view showing the external configuration of the penetrating member 330 and the force transmission member 340 in the second embodiment. As shown in FIG. 19, the penetrating member 330 is a tubular member in which a through hole 332 extending in the front-rear direction is formed, and is made of, for example, resin. A protrusion 335 protruding in the left-right direction (X-axis direction) perpendicular to both the front-rear direction and the up-down direction is formed on the outer circumferential surface of the penetrating member 330. A total of two protrusions 335 are provided, one on each side surface of the penetrating member 330. In this embodiment, the positions of the two protrusions 335 when viewed in the X-axis direction are the same. The left-right direction is an example of a fourth direction in the claims.

[0091] 15, the penetrating member 330 is housed inside the housing 310 on the proximal side of the hemostatic valve 320. In the penetrating member 330 housed in the housing 310, the through hole 332 communicates with the proximal opening 311 of the housing 310. Furthermore, the through hole 332 of the penetrating member 330 and the lumen 313 of the housing 310 are coaxial with each other.

[0092] The penetrating member 330 housed in the housing 310 is slidable in the front-rear direction with its vertical and horizontal positions relative to the housing 310 being determined. The penetrating member 330 is positioned so as to face the through hole 314A of the partition wall 314 in the front-rear direction. The penetrating member 330, which is slidable in the front-rear direction, can be positioned at a pressing position P2 (the state shown in FIG. 17) where the tip portion is inserted into the through hole 314A and the hemostasis valve 320 is pressed to open the hemostasis valve 320, and at a non-pressing position P1 (the state shown in FIG. 15 and FIG. 16) where the hemostasis valve 320 is not pressed and the hemostasis valve 320 is closed. As shown in FIG. 17, when the penetrating member 330 is positioned at the pressing position P2, the through hole 322 formed in the hemostasis valve 320 and the through hole 332 of the penetrating member 330 communicate with each other. The pressing position P2 of the penetrating member 330 is an example of a second position in the claims, and the non-pressing position P1 of the penetrating member 330 is an example of a first position in the claims.

[0093] As shown in Figs. 15 to 17, the operating member 380 is a substantially cylindrical member extending in a direction (hereinafter referred to as "operating direction D2") that is not parallel to the front-rear direction (Z-axis direction). The operating member 380 is supported by an outer tube 350 of a holding mechanism 360, which will be described later, and is slidable along the operating direction D2. In this embodiment, the operating direction D2 is a vertical direction that forms an angle of approximately 90 degrees with the front-rear direction. In this specification, approximately 90 degrees means a range of approximately 90 degrees plus or minus 5 degrees. A part of the base end side of the operating member 380 is exposed from the outer tube 350, and can be pressed by an operator such as a doctor. The operating member 380 is formed of, for example, resin. The operating direction D2 is an example of a second direction in the claims.

[0094] As shown in Figs. 15 to 17 and 19, the force transmission member 340 is a substantially rectangular parallelepiped member, and is formed of, for example, resin. The force transmission member 340 has a through hole 344 extending in the front-rear direction, and the penetrating member 330 is inserted into the through hole 344. A communication groove 345 that communicates the outer circumferential surface of the force transmission member 340 with the through hole 344 is formed on each of the left and right side surfaces of the force transmission member 340. Each communication groove 345 is perpendicular to the left-right direction and extends in a direction that is non-parallel to both the front-rear direction and the up-down direction. More specifically, each communication groove 345 extends in a direction from the lower base end side toward the upper tip end side. The inclination angle of each communication groove 345 with respect to the front-rear direction is, for example, 45 degrees. Each convex portion 335 of the penetrating member 330 is slidably inserted into each communication groove 345. This allows the penetrating member 330 to slide relatively with respect to the force transmitting member 340 along the extending direction of the communicating groove 345 .

[0095] A protruding projection 343 that protrudes upward is formed on the upper surface of the force transmission member 340. Moreover, a protruding projection 342 that protrudes downward is formed on the lower surface of the force transmission member 340.

[0096] 15, the force transmission member 340 is accommodated in the member accommodating space 316 of the housing 310 so as to be slidable along the operation direction D2. In the housing 310, a biasing member 362 is disposed below the force transmission member 340, and biases the force transmission member 340 upward. One end of the biasing member 362 is fixed to the bottom surface of the member accommodating space 316 of the housing 310, and the convex portion 342 (FIG. 19) of the force transmission member 340 is inserted into the hollow portion of the other end of the biasing member 362.

[0097] The force transmission member 340 can transmit to the penetrating member 330 a force that moves the operating member 380 toward the penetrating member 330 along the operation direction D2. That is, as shown in Fig. 15 and Fig. 16, when the force transmission member 340 is located at a retracted position P3 retracted upward, the convex portion 335 of the penetrating member 330 is located at a lower base end side portion of the communication groove 345 of the force transmission member 340 (hereinafter referred to as "closed position portion 345A"), whereby the penetrating member 330 is located at a base end side position, i.e., a non-pressing position P1 where the hemostasis valve 120 is not pressed. The retracted position P3 of the force transmission member 340 is an example of a third position in the claims.

[0098] 17, when the force transmission member 340 receives a pressing force from the operating member 380 and moves downward from the retracted position P3 along the operating direction D2 to the advanced position P4, the convex portion 335 of the penetrating member 330 moves relatively upward toward the tip side within the communicating groove 345 of the force transmission member 340 to reach the upper tip side portion (hereinafter referred to as "open position portion 345B"), whereby the penetrating member 330 is pressed and moves to the tip side position, i.e., to the pressing position P2 where the hemostasis valve 120 is pressed to open it. The advanced position P4 of the force transmission member 340 is an example of the fourth position in the claims.

[0099] The holding mechanism 360 (FIG. 15) is a so-called double knock mechanism, and switches between a state in which the force transmission member 340 is held in the retracted position P3 and a state in which the force transmission member 340 is held in the advanced position P4 every time the operating member 380 slides along the operating direction D2. The holding mechanism 360 has an outer cylinder 350 and a rotor 370. In this embodiment, a part of the operating member 380 and the biasing member 362 also constitute part of the holding mechanism 360.

[0100] The configuration of the holding mechanism 360 is similar to that of the holding mechanism 160 of the opening / closing mechanism 100 of the first embodiment described above, and therefore a description thereof will be omitted. That is, in the description of the configuration of the holding mechanism 160 of the opening / closing mechanism 100 described above, the outer tube 150 may be read as the outer tube 350, the rotor 170 as the rotor 370, and the biasing member 162 as the biasing member 362. However, in this embodiment, the biasing member 362 is disposed between the housing 310 and the force transmitting member 340 as described above, rather than between the force transmitting member 340 and the rotor 370. Even in such an arrangement, the biasing member 362 biases the force transmitting member 340 toward the outside of the housing 310 along the operation direction D2.

[0101] B-3. ​​Operation of the opening and closing mechanism: Next, the operation of the opening / closing mechanism 300 of the hemostasis valve 320 will be described. In the initial state, the holding mechanism 360 is in a rotor retracted state as shown in Figures 15 and 16. In this state, the force transmission member 340 is located at the retracted position P3, and the penetrating member 330 is not pressed toward the tip side from the force transmission member 340 and is located at the non-pressing position P1. Therefore, the hemostasis valve 320 is closed, and the opening / closing mechanism 300 becomes the closed-state opening / closing mechanism 300c.

[0102] For example, when an operation of pressing the operating member 380 toward the inside of the housing 310 (i.e., downward) along the operating direction D2 by the index finger of the operator holding the medical connector 10A (hereinafter referred to as a "valve opening operation") is performed, the operating member 380 slides downward along the operating direction D2. Accordingly, the holding mechanism 360 switches from the rotor retreat state to the rotor advance state. In this state, as shown in FIG. 17, the force transmission member 340 is displaced to the advanced position P4, and the penetrating member 330 is pressed toward the tip side by the force transmission member 340 and displaced to the pressing position P2. As a result, the tip of the penetrating member 330 presses the hemostatic valve 320 to open the hemostatic valve 320, and the opening / closing mechanism 300 becomes the open-state opening / closing mechanism 300o.

[0103] Furthermore, when the opening / closing mechanism 300 is in the open state opening / closing mechanism 300o, similarly to the valve opening operation, when an operation of pressing the operating member 380 toward the inside of the housing 310 (i.e., downward) along the operating direction D2 (hereinafter referred to as the "valve closing operation") is applied, the operating member 380 slides downward along the operating direction D2. Accordingly, the holding mechanism 360 switches from the rotor forward state to the rotor retreat state. In this state, as shown in Figs. 15 and 16, the force transmission member 340 is displaced to the retreated position P3, and the penetrating member 330 returns to the non-pressing position P1 without being pressed toward the tip side by the force transmission member 340. As a result, the penetrating member 330 does not press the hemostasis valve 320, closing the hemostasis valve 320, and the opening / closing mechanism 300 becomes the closed state opening / closing mechanism 300c.

[0104] In this way, every time the operating member 380 is pressed (valve opening operation or valve closing operation), the opening / closing mechanism 300 switches to the closed state opening / closing mechanism 300c or the open state opening / closing mechanism 300o.

[0105] B-4. Technical effect of the opening and closing mechanism: The opening and closing mechanism 300 of the second embodiment has the same configuration as that of the first embodiment, and therefore, as in the first embodiment, the operator can easily open and close the hemostatic valve 320 while holding the medical connector 10A, thereby improving the operability of the opening and closing mechanism 300.

[0106] The holding mechanism 360 has a cylindrical biasing member 362 that biases the force transmission member 340 to approach the operating member 380, and a convex portion 342 that is inserted into the hollow portion of the biasing member 362 is formed on the surface facing the biasing member 362. Therefore, according to the opening / closing mechanism 300 of the second embodiment, similar to the opening / closing mechanism 100 of the first embodiment, the positioning between the force transmission member 340 and the biasing member 362 can be easily and accurately performed, and the biasing force of the biasing member 362 can be effectively transmitted to the force transmission member 340, thereby improving the accuracy of the operation of the opening / closing mechanism 300.

[0107] The angle between the extension direction (Z-axis direction) of the lumen 313 of the housing 310 and the operation direction D2 of the operation member 380 is approximately 90 degrees. Therefore, according to the opening and closing mechanism 300 of the second embodiment, the operator can extremely easily open and close the hemostatic valve 320 with his or her thumb or index finger while holding the medical connector 10A, and the operability of the opening and closing mechanism 300 can be effectively improved.

[0108] The penetrating member 330 has a convex portion 335 that protrudes in the left-right direction, which is a direction perpendicular to both the extension direction (Z-axis direction) of the lumen 313 of the housing 310 and the operation direction D2, and the force transmission member 340 has a communication groove 345 into which the convex portion 335 is inserted. The communication groove 345 is perpendicular to the left-right direction and extends in a direction non-parallel to both the extension direction (Z-axis direction) of the lumen 313 of the housing 310 and the operation direction D2. Therefore, according to the opening / closing mechanism 300 of the second embodiment, the sliding of the force transmission member 340 along the up-down direction substantially perpendicular to the extension direction of the lumen 313 of the housing 310 and the sliding of the penetrating member 330 in the extension direction can be efficiently converted, and the operability of the opening / closing mechanism 300 can be effectively improved.

[0109] B-5. Modifications of the opening and closing mechanism: FIG. 20 is an explanatory diagram showing a configuration of a modified example (opening / closing mechanism 300X) of the opening / closing mechanism 300 of the second embodiment. The opening / closing mechanism 300X of the modified example shown in FIG. 20 differs from the opening / closing mechanism 300 of the second embodiment described above in that the operating member 380 and the force transmission member 340 are integrated into one member. Specifically, a connecting shaft 347 extends upward from the upper surface of the force transmission member 340, and the connecting shaft 347 passes through a through hole 379 formed in the rotor 370 to reach the operating member 380 and is connected to the operating member 380. Therefore, in the opening / closing mechanism 300X of the modified example, the operating member 380 and the force transmission member 340 slide integrally along the operating direction D2. In the opening / closing mechanism 300X of such a modified example, the holding mechanism 360 switches between a state in which the force transmission member 340 is held at the retreated position P3 or a state in which the force transmission member 340 is held at the advanced position P4 every time the operating member 380 slides along the operating direction D2. Therefore, the opening / closing mechanism 300X of the modified example can also improve the operability of the opening / closing mechanism 300.

[0110] C. Third embodiment: C-1. Medical connector configuration: 21 is an explanatory diagram showing the configuration of a vertical cross section (YZ cross section) of a medical connector 10B in the third embodiment. In the following, among the configurations of the medical connector 10B in the third embodiment, the same configurations as those of the medical connector 10 in the first embodiment described above are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

[0111] The medical connector 10B includes an opening / closing mechanism 100 and a fixing mechanism 200B. The opening / closing mechanism 100 included in the medical connector 10B is similar to the opening / closing mechanism 100 included in the medical connector 10 of the first embodiment, so a description thereof will be omitted, while a fixing mechanism 200B different from the first embodiment will be described.

[0112] C-2. Fixing mechanism configuration: Fig. 22 and Fig. 23 are explanatory diagrams showing the configuration of the fixing mechanism 200B, showing the configuration of the longitudinal section (YZ section). Fig. 22 shows the fixing mechanism 200B in a state where the fixing of a long medical device such as a guidewire GW is released (released state fixing mechanism 200n), and Fig. 23 shows the fixing mechanism 200B in a state where a long medical device is fixed (fixed state fixing mechanism 200f). Note that side views are shown for some members.

[0113] The fixing mechanism 200B of the third embodiment includes a circular tubular body 490 instead of the circular tubular body 290 in the fixing mechanism 200 of the first embodiment. The circular tubular body 490 has a different configuration of a through hole 491 from the circular tubular body 290. That is, the inner diameter of the through hole 491 that passes through the circular tubular body 490 in the longitudinal direction varies depending on the position along the axial direction. More specifically, in the circular tubular body 490, the inner diameter d1a of the through hole 491 in the central portion 490a is smaller than the inner diameter d1b in the tip portion 490b, and is smaller than the inner diameter d1c in the base end portion 490c. In other words, the through hole 491 is larger in diameter at the tip and base ends than at the central portion. Therefore, the area of ​​through hole 491 in the cross section of fixing mechanism 200B is such that the area S1a of through hole 491 in the cross section of central portion 490a (more specifically, in the cross section of fixing mechanism 200B (the same applies below)) is smaller than the area S1b of tip end portion 490b and smaller than the area S1c of base end portion 490c. The shape of through hole 491 in the cross section at each position may be any shape, for example, a circle. Through hole 491 is an example of a first through hole in the claims.

[0114] As in the first embodiment, stoppers 420 are attached to the distal end and proximal end of the circular tubular body 490. Each stopper 420 has a main body 421 having an outer diameter substantially equal to that of the central portion 490a of the circular tubular body 490, a first small diameter portion 423 located on the circular tubular body 490 side with respect to the main body 421 and having an outer diameter smaller than that of the main body 421, and a second small diameter portion 422 located on the opposite side of the circular tubular body 490 with respect to the main body 421 and having an outer diameter smaller than that of the main body 421. The first small diameter portion 423 is inserted into the through hole 491. In addition, the main body 421 is formed with a recess 424 into which a protrusion (not shown) of the housing 210 fits. The stopper 420 is positioned in the front-rear direction with respect to the housing 210 by the fitting of the protrusion and the recess 424, and as a result, the circular tubular body 490 is positioned in the front-rear direction with respect to the housing 210. In other words, the tip-side stopper 420 connects the tip portion 490b to the housing 210, and the base-side stopper 420 connects the base portion 490c to the housing 210. Each stopper 420 has a through hole 425 that communicates with the through hole 491. The shape of the through hole 425 in the cross section of each part may be any shape, for example, a circle. The tip-side stopper 420 is an example of a tip-side connecting part in the claims, and the through hole 425 of the tip-side stopper 420 is an example of a second through hole in the claims. In addition, the base-side stopper 420 is an example of a base-side connecting part in the claims, and the through hole 425 of the base-side stopper 420 is an example of a third through hole in the claims.

[0115] In the first small diameter portion 423 (portion inserted into the through hole 491 of the circular tubular body 490) of the stopper 420 on the tip side, the inner diameter d2 of the through hole 425 is larger than the inner diameter d1a of the through hole 491 in the central portion 490a. Therefore, the area S2 of the through hole 425 in the cross section of the first small diameter portion 423 of the stopper 420 on the tip side is larger than the area S1a of the through hole 491 in the cross section of the central portion 490a of the circular tubular body 490. Similarly, the inner diameter d3 of the through hole 425 in the first small diameter portion 423 (portion inserted into the through hole 491 of the circular tubular body 490) of the stopper 420 on the base side is larger than the inner diameter d1a of the through hole 491 in the central portion 490a of the circular tubular body 490. Therefore, the area S3 of the through hole 425 in the cross section of the first small diameter portion 423 of the base end side stopper 420 is larger than the area S1a of the through hole 491 in the cross section of the central portion 490a of the circular tubular body 490.

[0116] In this embodiment, the outer diameter of the central portion 490a is larger than the outer diameter of the tip portion 490b and is also larger than the outer diameter of the base end portion 490c. Therefore, in the circular tubular body 490 accommodated in the substantially hollow cylindrical circular tubular body accommodating space 215 in the housing 210, the outer peripheral surface of the central portion 490a is in contact with or close to the inner peripheral surface of the circular tubular body accommodating space 215, while the outer peripheral surfaces of the tip portion 490b and the base end portion 490c are separated from the inner peripheral surface of the circular tubular body accommodating space 215.

[0117] The fixing mechanism 200B of the third embodiment includes a pressing member 440 instead of the pressing member 240 of the first embodiment. The pressing member 440 has a shape similar to that of the pressing member 240 of the first embodiment with a portion above the through hole 241 removed. That is, the pressing member 440 is disposed below the central portion 490a of the circular tubular body 490, and in the above-mentioned released state, the upper surface of the pressing member 440 is in contact with or close to the outer circumferential surface of the central portion 490a of the tubular body 490.

[0118] As in the first embodiment, the pressing member 440 is slidable in the up-down direction (Y-axis direction) that is a direction perpendicular to the axial direction (Z-axis direction) of the circular tubular body 490. The pressing member 440 that is slidable in the up-down direction can be located at a non-pressing position P5 where it does not substantially press the circular tubular body 490, as shown in Fig. 22, and at a pressing position P6 displaced upward from the non-pressing position P5, as shown in Fig. 23. The state where it does not substantially press includes a state where the upper surface of the pressing member 440 is in close contact with the outer circumferential surface of the circular tubular body 490, in addition to a state where the upper surface of the pressing member 440 is separated from the outer circumferential surface of the circular tubular body 490.

[0119] On the other hand, when the pressing member 440 is located at the pressing position P6 (FIG. 23), the pressing member 440 presses the central portion 490a of the circular tubular body 490 upward from the outer periphery side, elastically deforming the central portion 490a. In this state, a contact point CP1 which is a lower part of the inner periphery of the central portion 490a, and a contact point CP3 which is an upper part of the inner periphery of the central portion 490a, which are the inner periphery of the through hole 491 of the elastically deformed central portion 490a, are pressed against the long medical device, and the long medical device is fixed to the fixing mechanism 200B by being sandwiched between the two contact points CP1 and CP3, and sliding in the front-rear direction is restricted.

[0120] Here, as described above, the area S2 of the through hole 425 in the cross section of the first small diameter portion 423 of the stopper 420 on the tip side and the area S3 of the through hole 425 in the cross section of the first small diameter portion 423 of the stopper 420 on the base side are larger than the area S1a of the through hole 491 in the cross section of the central portion 490a of the circular tubular body 490. Therefore, even in a state in which the pressing member 440 presses the central portion 490a of the circular tubular body 490 to fix the long medical device, the long medical device is prevented from being pressed against the inner circumferential surface of the stopper 420, and damage to the long medical device can be more effectively prevented. Note that such an effect can be obtained in a solid long medical device such as a guidewire, but is particularly noticeable in a long medical device having a hollow portion such as a catheter.

[0121] C. Variations: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the spirit of the invention. For example, the following modifications are also possible.

[0122] The configurations of the medical connector 10, the opening / closing mechanisms 100, 300, and the fixing mechanism 200 in the above embodiment are merely examples and can be modified in various ways. For example, in the above first embodiment, the convex portion 142 that is inserted into the hollow portion of the biasing member 162 is formed on the surface of the force transmission member 140 that faces the biasing member 162, but the convex portion 142 does not have to be formed. The convex portion 232 of the force transmission member 230 and the convex portion 342 of the force transmission member 340 can also be omitted in the same manner.

[0123] In the above embodiment, a so-called double knock mechanism is used as the holding mechanism 260 that switches between a state in which the force transmission member 230 is held at the retracted position P7 and a state in which the force transmission member 230 is held at the advanced position P8, but other mechanisms such as a heart cam mechanism may be used as the holding mechanism 260. Similarly, other mechanisms such as a heart cam mechanism may be used as the holding mechanism 160 and / or the holding mechanism 360 instead of the double knock mechanism.

[0124] In the above embodiment, the housing 210 and the stoppers 220, 240 may be an integral member.

[0125] The dimensions and materials of each member in the above embodiment are merely examples and can be modified in various ways.

[0126] In the above embodiment, the medical connector 10 has both the opening and closing mechanism 100 (or the opening and closing mechanism 300) and the fixing mechanism 200, but the medical connector 10 may have only one of the opening and closing mechanism 100 (or the opening and closing mechanism 300) and the fixing mechanism 200. [Explanation of symbols]

[0127] 10: Medical connectors 11: Main pipe section 12: Branch pipe section 13: Lumen 14:Lumen 20: Rotator 100: Opening and closing mechanism 110: Housing 110D: Tip side housing part 110P: Base side housing part 111: Proximal opening 112: Distal opening 113: Lumen 114: Bulkhead 114A: Through hole 115: Guide groove 116: Component receiving space 119: Convex portion 120: Hemostasis valve 121: Slit 122: Through hole 130: Penetrating member 131: Main body portion 132: Through hole 133: Flange portion 134: Guide protrusion 135: Guide protrusion 140: Force transmission member 142: Convex portion 143: Tip surface 144: Guide groove 145: Recess 147: Connecting shaft 150: Outer cylinder 153: Outer cylinder end surface cam 154: Shallow groove portion 155: Deep groove portion 160: Holding mechanism 162: biasing member 170: Rotor 173: Convex portion 174: Concave portion 179: Through hole 180: Operation member 181: sliding contact 182: operation member end surface cam 200:Fixing mechanism 210: Housing 211: Proximal opening 212: Distal opening 213: Lumen 214: Evacuation space 215: Circular tubular body accommodation space 216: Component accommodation space 220: Stopper 221: Main body portion 222: Second small diameter portion 223: First small diameter portion 224: Recess 230: Force transmission member 232: Convex portion 233: Surface 234: Upper surface 235: Guide groove 240: Pressing member 241: Through hole 244: Underside 245: Guide protrusion 250: Outer cylinder 260: Retention mechanism 262: Pressing member 270: Rotor 280: Operating member 290: Circular tubular body 291:Through hole 300: Opening and closing mechanism 310: Housing 311: Base end opening 312: Tip end opening 313:lumen 314: Bulkhead 314A:Through hole 316: Parts storage space 320: Hemostasis valve 321: Slit 322: Through hole 328: Boss 330: Penetrating member 332: Through hole 335: Protrusion 340: Force transmission member 342: protrusion 343: protrusion 344: through hole 345:Communication groove 345A: Closed position 345B: Open position 347:Connection shaft 350: Outer cylinder 360: Retention mechanism 362: Pressing member 370: Rotor 379:Through hole 380: Operation member 10B: Medical connector (third embodiment) 200B:Fixing mechanism 420: Stopper 421: Main body portion 422: Second small diameter portion 423: First small diameter portion 424: Recess 425: Through hole 440: Pressing member 490: Circular tubular body 490a: Central part 490b: Tip part 490c: Base end part 491:Through hole CP1: Contact point CP2: Contact point CP3: Contact point GC: Guiding catheter GW: Guidewire

Claims

1. A hemostasis valve opening and closing mechanism, comprising: a tubular housing having a lumen communicating with a distal end opening and a proximal end opening; a hemostasis valve attached within the housing, which is normally in a closed state and, when pressed from the base end side, is in an open state in which a through hole communicating with the tip end opening of the housing is formed; a penetrating member that is accommodated within the housing on the base end side of the hemostatic valve so as to be slidable along a first direction which is the extension direction of the lumen, the penetrating member having a through hole formed therein that communicates with the base end opening of the housing, the penetrating member being capable of being positioned at a first position at which the hemostatic valve is brought into the closed state, and at a second position that is a position further toward the tip end side along the first direction than the first position and that presses the hemostatic valve to bring the hemostatic valve into the open state, thereby communicating the through hole of the hemostatic valve with the through hole of the penetrating member; an operating member slidable along a second direction non-parallel to the first direction; a force transmission member that is slidably disposed between the penetrating member and the operating member in the second direction and transmits to the penetrating member a force that moves the operating member toward the penetrating member along the second direction, the force transmission member being capable of being positioned at a third position that positions the penetrating member at the first position, and a fourth position that presses the penetrating member to position it at the second position; a holding mechanism that switches between a state in which the force transmission member is held at the third position and a state in which the force transmission member is held at the fourth position every time the operating member slides along the second direction; Equipped with Hemostasis valve opening and closing mechanism.

2. The hemostasis valve opening and closing mechanism according to claim 1, The operating member and the force transmission member are an integral member. Hemostasis valve opening and closing mechanism.

3. The hemostasis valve opening and closing mechanism according to claim 1 or 2, the holding mechanism has a cylindrical biasing member that biases the force transmission member toward an outside of the housing along the second direction, directly or via another member; a protrusion to be inserted into a hollow portion of the biasing member is formed on a surface of the force transmission member or the other member facing the biasing member; Hemostasis valve opening and closing mechanism.

4. The hemostasis valve opening and closing mechanism according to claim 1 or 2, The angle between the first direction and the second direction is greater than or equal to 35 degrees and less than or equal to 55 degrees. Hemostasis valve opening and closing mechanism.

5. The hemostasis valve opening and closing mechanism according to claim 4, The penetrating member has a main body portion in which the through hole is formed, and a flange portion protruding from the main body portion in a third direction perpendicular to the first direction, The force transmission member is configured to be slidable relative to the penetrating member along the third direction while being in contact with a surface of the base end side of the flange portion. Hemostasis valve opening and closing mechanism.

6. The hemostasis valve opening and closing mechanism according to claim 1 or 2, The angle between the first direction and the second direction is approximately 90 degrees. Hemostasis valve opening and closing mechanism.

7. The hemostasis valve opening and closing mechanism according to claim 6, The force transmission member is slidable in the second direction, the penetrating member has a protrusion protruding in a fourth direction perpendicular to both the first direction and the second direction, The force transmission member has a groove into which the protrusion is inserted, the groove extending in a direction perpendicular to the fourth direction and non-parallel to both the first direction and the second direction. Hemostasis valve opening and closing mechanism.

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