Medical valve and opening / closing device for medical valve

Abstract

To provide a medical valve which is in an open state at a normal time, and can impart a proper pressurization force to a catheter according to a size of the catheter, and an opening / closing device for the medical valve.SOLUTION: A fixed valve 42 is in an open state at a normal time, constituted of an elastic material, formed into a cylindrical shape, and has a third lumen 42a. The fixed valve 42 is formed with an annular groove 42b which is opened at one end face in an axial direction, and parallel with an axial direction in a depth direction, and has a fixed cylinder portion 42C located between the third lumen 42a and the groove 42b. The fixed cylinder portion 42C is formed in such a manner that a position which is deeper in a groove depth is thicker than a position in which the groove depth is shallower in a thickness in a radial direction. The fixed cylinder portion 42c is pushed out inward by the intrusion of a pressing body 43B into the groove 42b, thus narrowing the third lumen 42a.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a medical valve and an opening / closing device for a medical valve.

Background Art

[0002] Patent Document 1 proposes a catheter connector connected to the proximal end of a catheter. In this catheter connector, a rigid plunger and a compressible plug are disposed in the inner hole of the main body. By rotating a lever rotatably provided on the main body, the compression edge of the lever presses the rigid plunger and the compressible plug, deforming the compressible plug inward in the radial direction. Thereby, a force is applied to the outer periphery of the catheter, and the catheter connector is connected to the catheter.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the catheter connector disclosed in Patent Document 1, the degree of pressing of the rigid plunger cannot be adjusted by the lever, and the compressible plug cannot apply an appropriate pressing force to the catheter according to the size of the catheter.

[0005] An object of the present disclosure is to provide a medical valve and an opening / closing device for a medical valve that are normally in an open state and can apply an appropriate pressing force to a catheter according to the size of the catheter.

Means for Solving the Problems

[0006] To solve the above object, a medical valve according to one aspect of the present disclosure is a medical valve that is normally in an open state, is made of an elastic material, and has a cylindrical shape with an inner cavity. An annular groove that opens at one end face in the axial direction and has a depth direction parallel to the axial direction is formed, and it has a fixed cylinder portion located between the inner cavity and the groove. The fixed cylinder portion is configured such that the thickness in the radial direction is greater at a position where the groove is deeper than at a position where the groove is shallower. When a pressing body enters the groove, the fixed cylinder portion is pushed inward so that the inner cavity is narrowed.

[0007] An opening / closing device for a medical valve according to one aspect of the present disclosure includes a case, a holding portion provided in the case, the above-described valve held by the holding portion, a cylindrical shape, and is supported so as to be movable along the axial direction of the valve with respect to the case. A pressing body configured to push the fixed cylinder portion inward to narrow the inner cavity by entering the groove.

[0008] Further provided in the case are a pressing portion having a portion to be pressed and the pressing body, and an operating portion that is supported so as to be movable along a direction orthogonal to the axial direction of the valve with respect to the case and has an inclined portion inclined with respect to the axial direction of the valve. By moving the operating portion along a direction orthogonal to the axial direction of the valve, the inclined portion presses the portion to be pressed to move the pressing portion and move the pressing body.

[0009] Further provided in the case are a pressing portion having a portion to be pressed and the pressing body, and an operating portion rotatably attached to the case. The operating portion has a cam having an outer peripheral surface whose distance from the rotation axis changes along the circumferential direction. By rotating the operating portion, the cam rotates, and the outer peripheral surface presses the portion to be pressed to move the pressing portion and move the pressing body.

[0010] The operation unit may have an operation lever connected to the cam, and the distance between the free end of the operation lever and the rotation axis may be configured to be longer than the distance between the rotation axis and the outer peripheral surface of the cam.

Advantages of the Invention

[0011] According to the present disclosure, it is possible to provide a medical valve that is normally in an open state and can apply an appropriate pressing force to a catheter according to the size of the catheter, and an opening / closing device for the medical valve.

Brief Description of the Drawings

[0012]

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Embodiments for Carrying out the Invention

[0013] Hereinafter, a medical valve and an opening / closing device for a medical valve according to an embodiment of the present disclosure are a medical valve and an opening / closing device for a medical valve used when inserting a catheter or the like into a treatment target site, and will be described with reference to the drawings.

[0014] <The First Embodiment> Hereinafter, a medical valve and an opening / closing device for a medical valve according to a first embodiment of the present disclosure will be described. FIG. 1 is a perspective view of the opening / closing device. FIG. 2 is a perspective view of the opening / closing device with the lever shown in FIG. 1 pulled up.

[0015] As shown in FIGS. 1 and 2, the opening / closing device 1 is a so-called Y-connector and includes a tube portion 10 and a valve portion 20. The tube portion 10 and the valve portion 20 are made of a synthetic resin. In FIG. 1, the lower left side of the tube portion 10 is the distal end side, and the upper right side of the valve portion 20 is the proximal end side.

[0016] The tube portion 10 has a first tube portion 11 and a second tube portion 12. The first tube portion 11 has a tubular shape, its axis extends linearly, and it is connected to the valve portion 20. The second tube portion 12 has a tubular shape, its axis extends linearly, and it is connected to an intermediate portion of the first tube portion 11. The lumen of the first tube portion 11 and the lumen of the second tube portion 12 communicate with each other. When the opening / closing device 1 is in use, the distal end portion of the first tube portion 11 is connected to a guiding catheter, a linear body such as a catheter or a guide wire is inserted into the lumen of the first tube portion 11, and an injector for injecting physiological saline or the like is connected to the second tube portion 12.

[0017] The valve portion 20 includes a case 21, a hemostatic portion 30 (FIGS. 3 and 4), and a fixing portion 40. The case 21 has a first case portion 22, a second case portion 23, and a pair of lever support portions 24.

[0018] The first case portion 22, the second case portion 23, and a pair of lever support portions 24. The first case portion 22 has a rectangular parallelepiped shape with one side open. An insertion hole (not shown) is formed in the wall located on the opposite side of the opening of the first case portion 22. Semi-circular notches 22a are formed in the walls located at both longitudinal ends of the first case portion 22, respectively. The second case portion 23 has a rectangular parallelepiped shape with one side open. An insertion hole (not shown) is formed in the wall located on the opposite side of the opening. Semi-circular notches 23a are formed in both walls located at both longitudinal ends of the second case portion 23, respectively.

[0019] By connecting the first case part 22 and the second case part 23 so that the opening of the first case part 22 and the opening of the second case part 23 are aligned, the first case part 22 and the second case part 23 form a single hollow rectangular parallelepiped. Inside the first case part 22 and the second case part 23, a part of the hemostatic part 30 and the fixing part 40 is accommodated. By connecting the first case part 22 and the second case part 23, the semi-circular notch 22a and the semi-circular notch 23a are combined to form a single circular insertion hole 25. The first tube part 11 is inserted into the insertion hole 25 on the tip side, and a first pressing part 33, which will be described later, is inserted into the insertion hole 25 on the base end side.

[0020] FIG. 3 is an external view of the closed hemostatic part 30 and the open fixing part 40 provided in the case 21 of FIG. 1. FIG. 4 is a cross-sectional view thereof. The hemostatic part 30 has a first holding part 31, a hemostatic valve 32, and a first pressing part 33. The first holding part 31 is fixed inside the case 21. The first holding part 31 has a first inner cavity 31a and is substantially cylindrical, and has a large-diameter part 34, a medium-diameter part 35, and a small-diameter part 36. The large-diameter part 34 has an outer diameter larger than that of the medium-diameter part 35, and the medium-diameter part 35 has an outer diameter larger than that of the small-diameter part 36. The large-diameter part 34 has an inner diameter larger than that of the medium-diameter part 35, and the medium-diameter part 35 has an inner diameter larger than that of the small-diameter part 36. An O-ring 37 is attached to an annular groove formed on the outer peripheral surface of the small-diameter part 36.

[0021] FIG. 5 is an explanatory view of the hemostatic valve 32 shown in FIG. 4, where (a) is a perspective view of the hemostatic valve 32 and (b) is a cross-sectional view of the hemostatic valve 32. The hemostatic valve 32 is made of an elastic material such as silicon rubber and is press-fitted and held in the large-diameter portion 34 of the first holding portion 31. The hemostatic valve 32 is normally in a closed state and has a cylindrical base portion 32A, a disk-shaped plate portion 32B, and a protruding portion 32C. The plate portion 32B is provided inside the end portion on the distal end side of the base portion 32A so as to close the opening on the distal end side of the base portion 32A. A through hole 32d is formed in the center of the plate portion 32B. The protruding portion 32C has a substantially cylindrical (cylindrical) shape and protrudes from the central portion of the plate portion 32B toward the distal end side. A through hole 32e penetrating along the axial direction thereof is formed in the protruding portion 32C. The through hole 32e is, for example, an axial hole that is normally (in a state where no pressing force acts) in a closed state, such as a pinhole or a puncture hole having a very small inner diameter. The inner diameter of the through hole 32e may be a size capable of suppressing leakage of blood to the proximal end side. The protruding portion 32C is configured such that its thickness is greater on the distal end side (free end side) than on the proximal end side. The diameters of the through hole 32d and the through hole 32e gradually decrease from the proximal end side toward the distal end side. The diameters of the through hole 32d and the through hole 32e along the axial direction of the base portion 32A are small at the end portion on the proximal end side, very large at the central portion of the plate portion 32B, and gradually decrease from there toward the distal end (protruding portion 32C).

[0022] FIG. 6 is an explanatory view of the manufacturing method of the hemostatic valve 32 shown in FIG. 5, where (a) is a perspective view of the hemostatic valve 32 in the manufacturing process and (b) is a cross-sectional view of the hemostatic valve 32 in the manufacturing process. In the manufacturing process, the hemostatic valve 32 is manufactured such that its protruding portion 32C protrudes inside the base portion 32A, that is, from the central portion of the plate portion 32B toward the proximal end side. Thereafter, by protruding the protruding portion 32C so as to be turned inside out to the distal end side of the plate portion 32B, the hemostatic valve 32 having the through holes 32d and 32e shown in FIG. 5 is manufactured.

[0023] As shown in FIGS. 3 and 4, the first pressing portion 33 has a cylindrical through body 33A, a first flange portion 33B, and a stopper 33C.

[0024] The through-body 33A extends along the axial direction of the base 32A and has a second lumen 33d. The first flange portion 33B is provided at the proximal end portion of the through-body 33A. The stopper 33C has a substantially cylindrical shape, is provided on the outer periphery of the through-body 33A, and extends from the surface on the distal end side of the first flange portion 33B toward the distal end side. A second flange portion 33E is provided at the distal end portion of the stopper 33C. The stopper 33C is inserted into the insertion hole 25 (FIG. 2) on the proximal end side of the case 21, and the first pressing portion 33 is supported so as to be reciprocally movable along the axial direction of the base 32A with respect to the case 21. The first flange portion 33B is located outside the case 21, and the second flange portion 33E is located inside the case 21. The second flange portion 33E prevents the first pressing portion 33 from coming out of the case 21.

[0025] In the state where the first pressing portion 33 is located at the most proximal side, the distal end of the through-body 33A is located within the through-hole 32d of the plate-like portion 32B. When the first pressing portion 33 is pressed distally by the operator, the distal end of the through-body 33A presses the plate-like portion 32B, expanding the through-hole 32d and the through-hole 32e. When the operator stops pressing the first pressing portion 33, the first pressing portion 33 is pushed back proximally by the elastic force of the plate-like portion 32B and the protruding portion 32C, and the hemostatic valve 32 returns to the closed state.

[0026] The fixing portion 40 includes a second holding portion 41, a fixing valve 42, a second pressing portion 43, a coil spring 44, an operation portion 45, and a lever 46. The second holding portion 41 has a substantially rectangular parallelepiped shape with an open proximal end, and is fixedly secured to the case 21 within the case 21 so as not to move. The first tube portion 11 is connected to the second holding portion 41.

[0027] FIG. 7 shows a perspective view of the fixed valve 42 shown in FIGS. 3 and 4. The fixed valve 42 is made of an elastic material such as silicone rubber and is press-fitted and held in the second holding portion 41. As shown in FIGS. 4 and 7, the fixed valve 42 is normally in an open state, has a cylindrical shape, and has a third inner cavity 42a. The fixed valve 42 is formed with an annular groove 42b that opens to the end face on the proximal end side and whose depth direction extends from the proximal end side to the distal end side along the axial direction of the fixed valve 42. The fixed cylinder portion 42C between the third inner cavity 42a and the groove 42b in the fixed valve 42 is configured such that its thickness is greater on the distal end side (the position where the depth of the groove 42b is deep) than on the proximal end side (the position where the depth of the groove 42b is shallow). In the present embodiment, the fixed cylinder portion 42C is configured such that its thickness increases stepwise outward from the proximal end side to the distal end side. For this reason, the groove 42b is configured such that its radial width decreases stepwise from the proximal end side to the distal end side. As will be described later, the fixed cylinder portion 42C abuts against the catheter, and the catheter is fixed to the valve opening / closing device 1.

[0028] FIG. 8 is a perspective view of the second pressing portion 43 shown in FIGS. 3 and 4. The second pressing portion 43 has a substantially cylindrical shape and has a fourth inner cavity 43a. The second pressing portion 43 includes a pressing body 43B, an insertion portion 43C, a third flange portion 43D, a support portion 43E, and a pair of pressed portions 43F.

[0029] The pressing body 43B has a cylindrical shape, and its thickness is configured to be thinner on the distal end side than on the proximal end side. In the present embodiment, the pressing body 43B becomes thinner stepwise from the proximal end side to the distal end side. The insertion portion 43C has a cylindrical shape and extends from the proximal end of the pressing body 43B toward the proximal end side. The diameter of the fourth inner cavity 43a in the insertion portion 43C is larger than that of the pressing body 43B. The small-diameter portion 36 of the first holding portion 31 is inserted into the insertion portion 43C, and the second pressing portion 43 is supported by the small-diameter portion 36 so as to be reciprocally movable along its axial direction. An O-ring 37 abuts against the inner peripheral surface of the insertion portion 43C.

[0030] The third flange portion 43D is rectangular and provided at the base end portion of the pressing body 43B. The support portion 43E has a pair of column portions 43E1 and an annular plate portion 43E2. The pair of column portions 43E1 are plate-shaped and are respectively provided near a pair of opposite sides on the surface on the base end side of the third flange portion 43D, and extend toward the base end side. The plate portion 43E2 is rectangular and is provided at the base ends of the pair of column portions 43E1. Each column portion 43E1 is connected near a pair of opposite sides on the surface on the tip end side of the plate portion 43E2 that face each other. Insertion holes (not shown) of the first case portion 22 and the second case portion 23 face each column portion 43E1. A gap 43g is formed between the plate portion 43E2 and the insertion portion 43C.

[0031] A pair of pressed portions 43F are provided on a pair of opposite sides on the surface on the tip end side of the plate portion 43E2, which are different from a pair of opposite sides where the pair of column portions 43E1 are connected. The pressed portion 43F has a first inclined surface 43F1 and a first flat surface 43F2. The first inclined surface 43F1 is inclined such that the thickness of the pressed portion 43F increases toward the tip end side as it separates from the lever 46 side. The first flat surface 43F2 is a plane orthogonal to the axial direction of the insertion portion 43C and is located on the side opposite to the lever 46 side of the first inclined surface 43F1.

[0032] As shown in FIG. 4, the coil spring 44 is interposed between the middle diameter portion 35 of the first holding portion 31 and the third flange portion 43D. The coil spring 44 passes through the gap 43g between the plate portion 43E2 and the insertion portion 43C. The coil spring 44 always biases the second pressing portion 43 toward the tip end side.

[0033] As shown in FIG. 3, the operation portion 45 is rectangular annular, and the insertion portion 43C of the second pressing portion 43, the pair of column portions 43E1, and the coil spring 44 pass through the inside thereof. The operation portion 45 is movably supported with respect to the case 21 so as to insert through insertion holes (not shown) of the first case portion 22 and the second case portion 23 along the direction in which the first case portion 22 and the second case portion 23 face each other (the direction orthogonal to the axial direction of the insertion portion 43C (the axial direction of the base portion 32A)).

[0034] The operation unit 45 has a pair of long portions 45A extending in the direction in which the first case portion 22 and the second case portion 23 face each other, and a pair of short portions 45B shorter than the long portions 45A. The long portions 45A face the respective pressed portions 43F of the second pressing portion 43 in the axial direction of the fourth inner cavity 43a. The long portions 45A have a tapered shape from the second case portion 23 side toward the first case portion 22 side. Specifically, the long portion 45A has a first side portion 45C, an inclined side portion 45D as an inclined portion, and a second side portion 45E on the side of the pressed portion 43F. The first side portion 45C is a side portion orthogonal to the axial direction of the insertion portion 43C (a side portion parallel to the front-end side surfaces of the first flat surface 43F2 and the plate portion 43E2). The inclined side portion 45D is continuous from the first side portion 45C and inclines so as to approach the front-end side as it separates from the lever 46 side. That is, the inclined side portion 45D is inclined with respect to the axial direction of the insertion portion 43C. The second side portion 45E is continuous from the inclined side portion 45D and is a side portion orthogonal to the axial direction of the insertion portion 43C (a side portion parallel to the front-end side surfaces of the first flat surface 43F2 and the plate portion 43E2).

[0035] In a state where the second pressing portion 43 is in a position to close the fixed valve 42, the first side portion 45C, the inclined side portion 45D, and the second side portion 45E are in contact with the front-end side surface of the plate portion 43E2, the first inclined surface 43F1, and the first flat surface 43F2, respectively. In a state where the second pressing portion 43 is in a position to open the fixed valve 42, the first side portion 45C is in contact with the first flat surface 43F2 (see FIG. 11).

[0036] As shown in FIGS. 1 and 2, one end of the lever 46 is swingably supported at the tip of a pair of lever support portions 24. The lever 46 abuts against the operation portion 45 between its swing axis and the free end. For this reason, the operation portion 45 and the second pressing portion 43 can be moved with a small load according to the principle of the lever. When the operator presses the lever 46 so that the other end thereof approaches the second case portion 23 side, the operation portion 45 is pushed, and as shown in FIGS. 1 and 3, the portion of the operation portion 45 on the side opposite to the lever 46 side protrudes from the case 21. At this time, due to the inclined side portion 45D of the operation portion 45, the first inclined surface 43F1 of the pressed portion 43F of the second pressing portion 43 is pushed and moves toward the proximal end side. As a result, the pressing body 43B of the second pressing portion 43 also moves toward the proximal end side, and as shown in FIG. 4, the fixed valve 42 is in an open state. When the first side portion 45C of the operation portion 45 abuts against the first flat surface 43F2 of the pressed portion 43F, the second pressing portion 43 does not move toward the distal end side, and the open state of the fixed valve 42 is maintained.

[0037] When the operation portion 45 is in the state shown in FIGS. 1 and 3, by pressing the portion of the operation portion 45 protruding from the case 21, the operation portion 45 moves toward the lever 46 side. As a result, due to the inclined side portion 45D of the operation portion 45, the second pressing portion 43 moves toward the distal end side by the biasing force of the coil spring 44, the pressing body 43B enters deep into the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is pushed inward, the third inner cavity 42a is narrowed, and the fixed valve 42 is in a closed state (see FIG. 12).

[0038] Next, the usage method of the opening and closing device 1 will be described. FIG. 9 is an external view of the open hemostatic portion 30 and the open fixing portion 40 provided in the case 21 of FIG. 1. FIG. 10 is a cross-sectional view thereof. FIG. 11 is an external view of the open hemostatic portion 30 and the closed fixing portion 40 provided in the case 21 of FIG. 1. FIG. 12 is a cross-sectional view thereof.

[0039] First, a guiding catheter (not shown) is attached to the tip of the first tube portion 11 of the opening / closing device 1 in which the hemostatic portion 30 shown in FIGS. 3 and 4 is in an open state and the fixing portion 40 is in an open state, and the guiding catheter is inserted to the treatment site. After the guiding catheter is inserted to the treatment site, the tip of the first tube portion 11 of the opening / closing device 1 may be attached to the guiding catheter. Then, with the hemostatic valve 32 and the fixing valve 42 open, a guide wire (filament) is inserted from the second inner cavity 33d of the first pressing portion 33 and introduced into the first inner cavity 31a of the first holding portion 31. After the tip of the guide wire passes through the hemostatic valve 32, the hemostatic valve 32 is closed. Since the inner peripheral surface of the protruding portion 32C of the hemostatic valve 32 is in close contact with the guide wire, leakage of blood or the like from the tip side to the base end side of the hemostatic valve 32 is suppressed. Note that, according to the thickness of the guide wire, the hemostatic valve 32 may be inserted in a slightly open state so that blood does not leak much with the first pressing portion 33 pressed. That is, as shown in FIGS. 9 and 10, the first pressing portion 33 is moved to the tip side, the penetrating body 33A presses the plate-like portion 32B of the hemostatic valve 32, and the introduction member may be introduced in a state where the through holes 32d and 32e are slightly expanded.

[0040] By further moving the guide wire to the tip side, it reaches the first tube portion 11 through the third inner cavity 42a of the second pressing portion 43 and is introduced into the guiding catheter attached to the tip of the first tube portion 11. After the guide wire reaches the treatment site, the catheter is inserted along the guide wire. At this time, the hemostatic valve 32 is opened in the same state as when the guide wire is inserted.

[0041] Then, as shown in FIGS. 11 and 12, the operator presses the portion protruding from the case 21 of the operation portion 45 and moves the operation portion 45 toward the lever 46 side. As a result, due to the inclined side portion 45D of the operation portion 45, the second pressing portion 43 moves to the tip side by the biasing force of the coil spring 44, and the pressing body 43B enters deeply into the fixing valve 42. Thereby, the diameter of the third inner cavity 42a of the second pressing portion 43 is reduced, and the fixing valve 42 is in a closed state in close contact with the catheter. As a result, the catheter is fixed to the opening / closing device 1.

[0042] From this state, the guide wire is withdrawn. At this time, since the hemostatic valve 32 is closed, it is possible to suppress blood leakage. Then, depending on the treatment method, a treatment instrument such as a balloon catheter or a stent is inserted using the lumen of the catheter for treatment. When the catheter is withdrawn after the treatment is completed, as shown in FIGS. 3 and 4, the fixed valve 42 is opened. Specifically, the lever 46 is pressed to move the operation unit 45 to the side opposite to the lever 46 side. As a result, by the inclined side portion 45D of the operation unit 45, the second pressing portion 43 moves to the proximal end side, and the third inner cavity 42a of the second pressing portion 43 expands in diameter. Blood flows back up to the hemostatic valve 32, but is stopped by the hemostatic valve 32, preventing further backflow. After the catheter is withdrawn, the guiding catheter is withdrawn, and the treatment is completed.

[0043] An injector or the like for injecting a liquid agent is connected to the second pipe portion 12 of the pipe portion 10, and a liquid agent such as physiological saline is supplied. The supplied liquid agent enters the guiding catheter through the first pipe portion 11 and is administered to the position of the treatment target.

[0044] As described above, the fixed valve 42 of the present disclosure is normally in an open state, is made of an elastic material, has a cylindrical shape, and has a third inner cavity 42a. The fixed valve 42 has an opening at one end face in the axial direction, and an annular groove 42b whose depth direction is parallel to the axial direction is formed, and has a fixed cylinder portion 42C located between the third inner cavity 42a and the groove 42b. The fixed cylinder portion 42C is configured such that the radial thickness is greater at the position where the groove is deeper than at the position where the groove is shallower. When the pressing body 43B enters the groove 42b, the fixed cylinder portion 42C is pushed inward so that the third inner cavity 42a is narrowed. According to this configuration, by changing the depth at which the pressing body 43B enters the groove 42b, the degree to which the third inner cavity 42a is narrowed can be changed. Thereby, it is possible to provide a fixed valve 42 capable of applying an appropriate pressing force to the catheter according to the size of the catheter.

[0045] The opening and closing device 1 includes a case 21, a second holding portion 41 provided in the case 21, a fixed valve 42 held by the second holding portion 41, a cylindrical shape, and is supported by the case 21 so as to be movable along the axial direction of the fixed valve 42. By entering the groove 42b, a pressing body 43B configured to push out the fixed cylindrical portion 42C inward to narrow the third inner cavity 42a. According to this configuration, by changing the depth at which the pressing body 43B enters the groove 42b, the degree to which the third inner cavity 42a is narrowed can be changed. Thereby, an opening and closing device 1 capable of applying an appropriate pressing force to the catheter according to the size of the catheter can be provided.

[0046] The opening and closing device 1 further includes a second pressing portion 43 provided in the case 21 and having a portion to be pressed 43F and a pressing body 43B, and an operating portion 45 supported by the case 21 so as to be movable along a direction orthogonal to the axial direction of the fixed valve 42 and having an inclined side portion 45D inclined with respect to the axial direction of the fixed valve 42. By moving the operating portion 45 along a direction orthogonal to the axial direction of the fixed valve 42, the inclined side portion 45D presses the portion to be pressed 43F to move the second pressing portion 43 and move the pressing body 43B. Thereby, the pressing body 43B can be moved with a small load.

[0047] <Second Embodiment> Next, an opening and closing device for a medical valve according to a second embodiment of the present disclosure will be described with reference to the drawings. The same members as those of the opening and closing device 1 of the first embodiment are denoted by the same reference numerals and the description thereof is omitted, and a configuration different from that of the opening and closing device 1 of the first embodiment will be described.

[0048] FIG. 13 is a perspective view of the opening and closing device 101. FIG. 14 is a perspective view of the opening and closing device 101 in a state where the button portion 146 of the operating portion 145 of the opening and closing device 101 shown in FIG. 13 protrudes from the opening 123b of the protruding portion 123A. As shown in FIGS. 13 and 14, the opening and closing device 101 is different in the configuration of the second case portion 123 and the operating portion 145 from the configuration of the second case portion 23 and the operating portion 45 of the first embodiment.

[0049] As shown in FIGS. 13 and 14, a rectangular tubular protruding portion 123A is provided on the wall located on the opposite side of the opening of the second case portion 123. Through the opening 123b of the protruding portion 123A, the button portion 146 of the operation portion 145 described later can protrude and retract.

[0050] FIG. 15 is an external view of the hemostatic portion 30 in the closed state and the fixing portion 40 in the open state provided in the case 21 of FIG. 13. FIG. 16 is an external view of the hemostatic portion 30 in the closed state and the fixing portion 40 in the closed state provided in the case 21 of FIG. 14. The operation portion 145 is substantially L-shaped in plan view and has a button portion 146 at the end on the side of the protruding portion 123A. The button portion 146 extends from the end of the operation portion 145 toward the proximal end side. As shown in FIGS. 13 and 14, the button portion 146 may have three protrusions extending from the distal end side to the proximal end side. The present invention is not limited to this shape.

[0051] When the operation portion 145 is in the state shown in FIGS. 13 and 15, by pressing the portion of the operation portion 145 protruding from the case 21, the operation portion 145 moves toward the button portion 146 side. As a result, due to the inclined side portion 45D of the operation portion 145, the second pressing portion 43 moves toward the distal end side by the biasing force of the coil spring 44, and the pressing body 43B enters deeply into the fixed valve 42, and the fixed valve 42 becomes a closed state (see FIG. 12). On the other hand, when the operator presses the button portion 146 toward the first case 21 side, the operation portion 145 is pushed, and as shown in FIGS. 13 and 15, the portion of the operation portion 145 opposite to the button portion 146 side protrudes from the case 21. At this time, due to the inclined side portion 45D of the operation portion 45, the second pressing portion 43 moves toward the proximal end side when the first inclined surface 43F1 of its pressed portion 43F is pushed. As a result, the pressing body 43B of the second pressing portion 43 also moves toward the proximal end side, and the fixed valve 42 becomes an open state.

[0052] The opening / closing device 101 of the present embodiment can also achieve the same effects as the opening / closing device 1 of the first embodiment.

[0053] <Third Embodiment> Next, an opening / closing device for a medical valve according to a third embodiment of the present disclosure will be described with reference to the drawings. For members identical to those of the opening / closing device 101 of the second embodiment, the same reference numerals will be given and the description thereof will be omitted, and configurations different from those of the opening / closing device 101 of the second embodiment will be described.

[0054] FIG. 17 is an external view of a hemostatic portion 230 in a closed state and a fixing portion 40 in an open state provided in a case 221 of an opening / closing device 201 of the present embodiment. The opening / closing device 201 of the present embodiment differs in the configurations of the case 221 and the hemostatic portion 230 from those of the case 21 and the hemostatic portion 30 of the opening / closing device 101 of the second embodiment.

[0055] The case 221 has a first case portion 222 that is longer in the longitudinal direction than the first case portion 22 and in which two insertion holes (not shown) are formed. The second case portion 223 is longer in the longitudinal direction than the second case portion 23, and a protruding portion 223A having the same shape as that is provided on the proximal end side of the protruding portion 123A. Through the opening of the protruding portion 223A, the button portion 234C of the operation portion 234 can be made to protrude and retract.

[0056] The hemostatic portion 230 includes a first holding portion 31, a hemostatic valve 32 (see FIGS. 4 and 5), a third pressing portion 250, a coil spring 233, an operation portion 234, and a spring support portion 235.

[0057] The third pressing portion 250 has substantially the same configuration as the second pressing portion 43. Therefore, the third pressing portion 250 has a substantially cylindrical shape and has a lumen (not shown). The third pressing portion 250 includes a penetrating body 251, an insertion portion 252, a flange portion 253, a support portion 254, and a pair of pressed portions 255.

[0058] The penetrating body 251 has a cylindrical shape, and its outer diameter and inner diameter are the same as those of the penetrating body 33A of the second embodiment. The cylindrical portion 235A of the spring support portion 235 is inserted into the insertion portion 252, and the third pressing portion 250 is supported so as to be movable along the axial direction thereof on the cylindrical portion 235A. The support portion 254 includes a pair of column portions 254A and an annular plate portion 254B. The pressed portion 255 has a first inclined surface 255A and a first flat surface 255B.

[0059] The coil spring 233 is interposed between the spring support portion 235 and the flange portion 253. The coil spring 233 passes through the gap between the plate portion 254B and the insertion portion 252. The coil spring 233 constantly biases the third pressing portion 250 toward the tip side.

[0060] The operation portion 234 has a rectangular ring shape, and the insertion portion 252 of the third pressing portion 250, the pair of column portions 254A, and the coil spring 233 pass through the inside thereof. The operation portion 234 is movably supported with respect to the case 221 so as to insert through the insertion holes (not shown) of the first case portion 222 and the second case portion 223 along the direction in which the first case portion 222 and the second case portion 223 face each other.

[0061] The operation portion 234 has the same shape as the operation portion 145. The operation portion 234 has a pair of long portions 234A, a pair of short portions 234B, and a button portion 234C. Each long portion 234A has a first side portion 234D, an inclined side portion 234E, and a second side portion 234F on the side of each pressed portion 255.

[0062] When the operation portion 234 is in the state shown in FIG. 17, by pressing the portion of the operation portion 234 protruding from the first case portion 222, the operation portion 234 moves toward the button portion 234C. As a result, due to the inclined side portion 234E of the operation portion 234, the third pressing portion 250 moves toward the tip side by the biasing force of the coil spring 233, and the penetrating body 251 presses the plate-like portion 32B and the protruding portion 32C of the hemostatic valve 32, expanding the through hole 32d and the through hole 32e. Thereby, the hemostatic valve 32 is in an open state. On the other hand, when the operator presses the button portion 234C toward the first case 221 side, the operation portion 234 is pushed, and the portion of the operation portion 234 opposite to the button portion 234C side protrudes from the first case portion 222. At this time, due to the inclined side portion 234E of the operation portion 234, the third pressing portion 250 moves toward the base end side as the first inclined surface 255A of its pressed portion 255 is pushed. Thereby, the penetrating body 251 of the third pressing portion 250 also moves toward the base end side, and the hemostatic valve 32 is in a closed state.

[0063] <Fourth Embodiment> Next, an opening / closing device for a medical valve according to the fourth embodiment of the present disclosure will be described with reference to the drawings. For members identical to those of the opening / closing device 1 of the first embodiment, the same reference numerals will be given and the description thereof will be omitted. FIG. 18 is a perspective view of the opening / closing device. FIG. 19 is an exploded perspective view of the case of the opening / closing device shown in FIG. 18.

[0064] The opening / closing device 301 includes a tube portion 10 and a valve portion 320. The valve portion 320 includes a case 321, a hemostatic portion 330 (FIGS. 20 and 21), and a fixing portion 340 (FIGS. 20 and 21). The case 321 has a first case portion 322 and a second case portion 323.

[0065] The first case portion 322 has a rectangular parallelepiped shape with one side open. A pair of insertion holes 322a and 322b are formed in the wall located on the side opposite to the opening of the first case portion 322. Semi-circular notches 322c are formed in the walls located at both ends in the longitudinal direction of the first case portion 322. The second case portion 323 has a rectangular parallelepiped shape with one side open. Semi-circular notches 323a are formed in both walls located at both ends in the longitudinal direction of the second case portion 323.

[0066] By connecting the first case portion 322 and the second case portion 323 so that the openings of the first case portion 322 and the second case portion 323 are aligned, the first case portion 322 and the second case portion 323 constitute a single hollow rectangular parallelepiped. A part of the hemostatic portion 330 and the fixing portion 340 is accommodated in the first case portion 322 and the second case portion 323. By connecting the first case portion 322 and the second case portion 323, the semi-circular notch 322c and the semi-circular notch 323a are combined to form a single circular insertion hole 325. The first tube portion 11 is inserted into the insertion hole 325 on the tip side.

[0067] FIG. 20 is a perspective view of the hemostatic portion 330 in the open state and the fixing portion 340 in the closed state of the opening / closing device 301 shown in FIG. 18. FIG. 21 is a cross-sectional view of them in the open state.

[0068] The hemostatic part 330 includes a first holding part 31, a hemostatic valve 32, a first pressing part 333, a valve fixing part 334, and a first operating part 338. The first holding part 31 is fixed to the case 321. The hemostatic valve 32 is made of an elastic material such as silicon rubber and is held by the large-diameter part 34 of the first holding part 31. The valve fixing part 334 has a disk-shaped lid part 334A having a through hole and being substantially cylindrical, a cylindrical first fixing part 334B, and a cylindrical second fixing part 334C provided on the outer periphery of the first fixing part 334B. The valve fixing part 334 is press-fitted into the large-diameter part 34 so as to close the opening of the large-diameter part 34 of the first holding part 31 while sandwiching the base part 32A of the hemostatic valve 32 between the first fixing part 334B and the second fixing part 334C. Thereby, the hemostatic valve 32 is held by the first holding part 31.

[0069] The first pressing part 333 is supported in the case 321 so as to be movable along the axial direction of the hemostatic valve 32 with respect to the case 321. FIG. 22 is a perspective view of the first pressing part 333 in FIG. 21. As shown in FIGS. 21 and 22, the first pressing part 333 has a cylindrical through body 333A and a pressed part 333B. The first pressing part 333 is substantially cylindrical and has a second inner cavity 333c. The pressed part 333B is connected to the proximal end of the through body 333A. The pressed part 333B has a main body part 333D and a pair of rectangular flange parts 333E provided at both axial ends of the main body part 333D with respect to the first holding part 31.

[0070] FIG. 23 is a partial cross-sectional external view of the hemostatic portion 330 in the open state of FIG. 21. As shown in FIGS. 21 and 23, the first operation portion 338 includes a pressing cam 338A, a connecting portion 338B, and an operation lever 338C. The pressing cam 338A is a so-called plate cam and has a first cam surface 338D, a second cam surface 338E, and a third cam surface 338F. In the order of the first cam surface 338D, the second cam surface 338E, and the third cam surface 338F, the distance from the rotation axis C1 of the pressing cam 338A becomes farther. That is, the pressing cam 338A has an outer peripheral surface whose distance from the rotation axis C1 changes along the circumferential direction. The pressing cam 338A is disposed between a pair of flange portions 333E. The rotation axis C1 of the pressing cam 338A is configured not to intersect the axis of the through-body 333A and to be in a displaced position.

[0071] The connecting portion 338B is connected to the pressing cam 338A and extends along the rotation axis C1 and passes through the insertion hole 322b (FIG. 19) of the first case portion 322. Thereby, the first operation portion 338 is rotatably supported with respect to the first case portion 322 about the rotation axis C1. The operation lever 338C is located outside the first case portion 322 and is connected to the connecting portion 338B. The connecting portion 338B connects the pressing cam 338A and the operation lever 338C. The distance between the free end of the operation lever 338C and the rotation axis C1 is longer than the distance between the rotation axis C1 and the outer peripheral surface of the pressing cam 338A.

[0072] FIG. 24 is a partial cross-sectional external view of the hemostatic portion 330 in a semi-open state in the opening / closing device 301 shown in FIG. 18. FIG. 25 is a partial cross-sectional external view of the hemostatic portion 330 in an open state in the opening / closing device 301 shown in FIG. 18. FIG. 26 is a cross-sectional view of the hemostatic portion 330 in an open state and the fixing portion 340 in an open state in the opening / closing device 301 shown in FIG. 18. In the hemostatic portion 330 in the open state shown in FIGS. 21 and 23, the first pressing portion 333 is located at the most proximal side, and the first cam surface 338D of the pressing cam 338A is in contact with the flange portion 333E at the tip side of the portion to be pressed 333B. When the operator rotates the operation lever 338C clockwise, the pressing cam 338A rotates while pressing the flange portion 333E at the tip side toward the tip side, and as shown in FIG. 24, the second cam surface 338E comes into contact with the flange portion 333E at the tip side. As a result, the first pressing portion 333 moves toward the tip side, and the tip of the penetrating body 333A presses the plate-like portion 32B, slightly expanding the through hole 32d and the through hole 32e.

[0073] When the operator further rotates the operation lever 338C clockwise, the pressing cam 338A rotates while pressing the flange portion 333E at the tip side toward the tip side, and as shown in FIG. 25, the third cam surface 338F comes into contact with the flange portion 333E at the tip side. As a result, as shown in FIG. 26, the first pressing portion 333 further moves toward the tip side, and the tip of the penetrating body 333A further presses the plate-like portion 32B, expanding the through hole 32d and the through hole 32e. When the operator rotates the operation lever 338C counterclockwise, the first pressing portion 333 is pushed back toward the proximal side by the elastic force of the plate-like portion 32B and the protruding portion 32C, and the hemostatic valve 32 returns to the closed state.

[0074] FIG. 27 is a partial cross-sectional external view of the hemostatic part 330 when the pressing cam 338A is moving from the closed state of FIG. 23 to the semi-open state of FIG. 24. In FIG. 27, a line segment connecting the rotation axis C1 of the pressing cam 338A and the contact part 338G (the boundary part between the first cam surface 338D and the second cam surface 338E) with respect to the flange part 333E on the tip side of the pressing cam 338A intersects the axis of the through-body 333A. Therefore, a moment is generated on the pressing cam 338A by the elastic force of the plate-like part 32B and the protruding part 32C of the hemostatic valve 32. On the other hand, as shown in FIGS. 23 to 25, when the first cam surface 338D, the second cam surface 338E, and the third cam surface 338F contact the flange part 333E on the tip side, the elastic force of the plate-like part 32B and the protruding part 32C of the hemostatic valve 32 is added along a direction parallel to the axis of the through-body 333A with respect to the rotation axis C1 of the pressing cam 338A. Therefore, no moment is generated on the pressing cam 338A. For this reason, a clicking feeling can be generated when the operator rotates the pressing cam 338A.

[0075] As shown in FIG. 21, the fixing part 340 includes a second holding part 41, a fixing valve 42, a second pressing part 343, a coil spring 44, and a second operating part 345. The second holding part 41 is fixed immovably to the case 321 inside the case 321. The fixing valve 42 is made of an elastic material such as silicon rubber and is press-fitted and held in the second holding part 41. In the present embodiment, the fixing cylinder part 42C of the fixing valve 42 is tapered from the tip side toward the base end side.

[0076] Figure 28 is a perspective view of the second pressing part 343 shown in Figure 21. The second pressing part 343 is supported within the case 321 so as to be movable along the axial direction of the fixed valve 42 with respect to the case 321. As shown in Figures 21 and 28, the second pressing part 343 has a cylindrical pressing body 343A and a pressed part 343B. The second pressing part 343 has a substantially cylindrical shape and has a fourth inner cavity 343c. The diameter of the fourth inner cavity 343c is smaller at the base end portion than at the tip end portion in the pressing body 343A, and is larger than the diameter of the pressing body 343A in the pressed part 343B. The pressed part 343B is connected to the base end of the pressing body 343A. The pressed part 343B has a main body part 343D and a pair of rectangular flange parts 343E provided at both axial ends of the main body part 343D with respect to the second holding part 41. The small-diameter part 36 of the first holding part 31 is inserted into the pressed part 343B, and the second pressing part 343 is supported so as to be reciprocally movable along the axial direction thereof in the small-diameter part 36. An O-ring 37 abuts against the inner peripheral surface of the pressed part 343B.

[0077] Figure 29 is a partial cross-sectional external view of the fixed part 340 in the open state of Figure 21. As shown in Figures 21 and 29, the second operation part 345 has a pressing cam 345A, a connecting part 345B, and an operation lever 345C. The pressing cam 345A is a so-called plate cam and has a first cam surface 345D, a second cam surface 345E, and a third cam surface 345F. In the order of the first cam surface 345D, the second cam surface 345E, and the third cam surface 345F, the distance from the rotation axis C2 of the pressing cam 345A becomes farther. That is, the pressing cam 345A has an outer peripheral surface whose distance from the rotation axis C2 changes along the circumferential direction. The pressing cam 345A is disposed between the pair of flange parts 343E. The rotation axis C2 of the pressing cam 345A is configured not to intersect the axis of the pressing body 343A and to be in a displaced position.

[0078] The connecting part 345B is connected to the pressing cam 345A, extends along the rotation axis C2, and penetrates the insertion hole 322a (Fig. 19) of the first case part 322. As a result, the second operation part 345 is rotatably supported with respect to the first case part 322 about the rotation axis C2. The operation lever 345C is located outside the first case part 322 and is connected to the connecting part 345B. The connecting part 345B connects the pressing cam 345A and the operation lever 345C. The coil spring 44 is interposed between the fixed valve 42 and the flange part 343E on the tip side. The coil spring 44 always biases the second pressing part 343 toward the base end side.

[0079] Fig. 30 is a partial cross-sectional external view of the fixed part 340 in a semi-closed state in the opening and closing device 301 shown in Fig. 18. Fig. 31 is a partial cross-sectional external view of the fixed part 340 in an open state in the opening and closing device 301 shown in Fig. 18. Fig. 32 is a cross-sectional view of the hemostatic part 330 in a closed state and the fixed part 340 in a closed state in the opening and closing device 301 shown in Fig. 18. In the fixed part 340 in the open state shown in Figs. 21 and 29, the first pressing part 343 is located at the most base end side, and the first cam surface 345D of the pressing cam 345A is in contact with the flange part 343E on the tip side of the part to be pressed 343B. When the operator turns the operation lever 345C clockwise, the pressing cam 345A rotates and presses the flange part 343E on the tip side toward the tip side. As shown in Fig. 30, the second cam surface 345E comes into contact with the flange part 343E on the tip side. As a result, the first pressing part 343 moves toward the tip side, the tip of the pressing body 343A enters the groove 42b of the fixed valve 42, the fixed cylinder part 42C is slightly pushed inward, and the fixed valve 42 becomes in a semi-closed state.

[0080] When the operator further rotates the operation lever 345C counterclockwise, the pressing cam 345A rotates and presses the flange portion 343E on the distal end side toward the distal end side. As shown in FIG. 31, the third cam surface 345F abuts against the flange portion 343E on the distal end side. As a result, as shown in FIG. 32, the first pressing portion 343 further moves toward the distal end side, the tip of the pressing body 343A enters deep into the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is pushed inward, the third inner cavity 42a is narrowed, and the fixed valve 42 is in a closed state. When the operator rotates the operation lever 345C clockwise until the first cam surface 345 abuts against the flange portion 343E on the distal end side, the second pressing portion 343 is pushed by the coil spring 44 and moves toward the proximal end side, and the fixed valve 42 is in an open state.

[0081] FIG. 33 is a partial cross-sectional external view of the fixing portion 340 when the pressing cam 345A is moving from the semi-closed state of FIG. 30 to the closed state of FIG. 31. A line segment connecting the rotation axis C2 of the pressing cam 345A and the contact portion 345G (the boundary portion between the second cam surface 345E and the third cam surface 345F) with respect to the flange portion 343E on the distal end side of the pressing cam 345A intersects the axis of the pressing body 343A. Therefore, a moment is generated on the pressing cam 345A by the elastic force of the fixed valve 42. On the other hand, as shown in FIGS. 29 to 31, when the first cam surface 345D, the second cam surface 345E, and the third cam surface 345F abut against the flange portion 343E on the distal end side, the elastic force of the fixed valve 42 is added along a direction parallel to the axis of the pressing body 343A with respect to the rotation axis C2 of the pressing cam 345A. Therefore, no moment is generated on the pressing cam 345A. For this reason, a clicking feeling can be generated when the operator rotates the pressing cam 345A.

[0082] The opening / closing device 301 is provided inside the case 321, and further includes a second pressing part 343 having a pressed part 343B and a pressing body 343A, and a second operation part 345 rotatably attached to the case 321. The second operation part 345 abuts against the pressed part 343B and has a pressing cam 345A having an outer peripheral surface whose distance from the rotation axis C2 changes along the circumferential direction. By rotating the second operation part 345, the pressing cam 345A rotates, and the outer peripheral surface presses the pressed part 343B to move the second pressing part 343 and move the pressing body 343A. According to this configuration, the fixed valve 42 in the closed state can be easily opened by the second pressing part 343 having the pressing cam 345A.

[0083] The distance between the free end of the operation lever 345C and the rotation axis C2 is configured to be longer than the distance between the rotation axis C2 and the outer peripheral surface of the pressing cam 345A. Thereby, the pressing body 343A can be moved with a small load by the principle of the lever.

[0084] <Fifth Embodiment> Next, the opening / closing device of the medical valve according to the fifth embodiment of the present disclosure will be described with reference to the drawings. The same members as those of the opening / closing device 301 in the fourth embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0085] FIG. 34 is a perspective view of the second pressing part 443 of the present embodiment. FIG. 35 is a partial cross-sectional external view of the fixed part 440 in the open state of the present embodiment. As shown in FIGS. 34 and 35, in the opening / closing device of the present embodiment, the configurations of the second pressing part 443 and the pressing cam 445A are different from the configurations of the second pressing part 343 and the pressing cam 345A in the fourth embodiment.

[0086] The second pressing part 443 has substantially the same configuration as the second pressing part 343 of the fourth embodiment, and includes a cylindrical pressing body 443A and a pressed part 443B. The second pressing part 443 has a substantially cylindrical shape and has a fourth inner cavity 443c. The pressed part 443B includes a main body part 443D and a pair of rectangular flange parts 443E provided at both axial ends of the fixed valve 42 with respect to the main body part 343D. A convex part 443F is provided on the base end side surface of the flange part 443E on the tip side. The convex part 443F is provided at a position where a line segment connecting the rotation axis C3 of the pressing cam 445A described later and the convex part 443F is parallel to the axis of the fourth inner cavity 443c. A rectangular notch 443g is formed in the flange part 443E on the base end side. The notch 443g is configured to be flush with the upper surface of the main body part 443D.

[0087] The pressing cam 445A is a so-called plate cam, and first to sixth concave parts 445b to 445g are formed along its outer periphery. In the order of the first to sixth concave parts 445b to 445g, the distance from the rotation axis C3 of the pressing cam 445A becomes farther. That is, the pressing cam 445A has an outer peripheral surface whose distance from the rotation axis C3 changes along the circumferential direction. The pressing cam 445A is disposed between the pair of flange parts 445E, and any one of the first to sixth concave parts 445b to 445g engages with the convex part 443F of the flange part 443E on the tip side. The rotation axis C3 of the pressing cam 445A is configured not to intersect the axis of the pressing body 443A and to be in a displaced position.

[0088] A protrusion 445H is provided on the upper surface of the pressing cam 445A. A plurality of concave parts are formed on the upper inner surface of the first case part 322 along a circle centered on the rotation axis C3 of the pressing cam 445A and having a line segment connecting the rotation axis C3 and the protrusion 445H as the radius. The plurality of concave parts are formed at positions corresponding to the position of the protrusion 445H in a state where each of the first to sixth concave parts 445b to 445g engages with the convex part 443F.

[0089] FIG. 36 is a partial cross-sectional external view of the fixed portion 440 in the semi-closed state in the present embodiment. FIG. 31 is a partial cross-sectional external view of the fixed portion 440 in the open state in the present embodiment. In the fixed portion 440 in the open state shown in FIG. 35, the first recess 445b engages with the convex portion 443F, and the first pressing portion 443 is located at the most proximal end side. When the operator rotates the operation lever 345C clockwise, the pressing cam 445A rotates, and while the second and third recesses 445c and 445d sequentially engage with the convex portion 443F, the flange portion 443E at the distal end side is pressed toward the distal end side, and the fourth recess 445e is engaged with the convex portion 443F as shown in FIG. 36. As a result, the first pressing portion 443 moves toward the distal end side, the tip of the pressing body 443A enters the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is slightly pushed inward, and the fixed valve 42 becomes a semi-closed state.

[0090] When the operator further rotates the operation lever 345C clockwise, the pressing cam 445A rotates, and while the fifth recess 445f engages with the convex portion 443F, the flange portion 443E at the distal end side is further pressed toward the distal end side, and the sixth recess 445g is engaged with the convex portion 443F as shown in FIG. 37. As a result, the second pressing portion 443 further moves toward the distal end side, the tip of the pressing body 443A enters deeper into the groove 42b of the fixed valve 42, the fixed cylinder portion 42C is pushed inward, the third inner cavity 42a is narrowed, and the fixed valve 42 becomes a closed state (see FIG. 32). When the operator rotates the operation lever 345C counterclockwise until the first recess 445b engages with the convex portion 443F, the second pressing portion 443 is pushed by the coil spring 44 and moves toward the proximal end side, and the fixed valve 42 becomes an open state.

[0091] As shown in FIGS. 36 and 37, when the pressing cam 445A rotates and the second pressing portion 443 moves toward the distal end side, the proximal end side portion of the pressing cam 445A is configured to protrude more proximally than the proximal end side flange portion 443E through the notch 443g of the proximal end side flange portion 443E. In this way, in the second pressing portion 443 of the present embodiment, by forming the notch 443g in the proximal end side flange portion 443E, the length in the longitudinal direction of the second pressing portion 443 can be shortened, and thus the length in the longitudinal direction of the opening / closing device can be shortened.

[0092] When the pressing cam 445A rotates, the protrusion 445H sequentially engages with a plurality of recesses (not shown) formed on the upper inner surface of the first case portion 322. Therefore, a clicking sensation can be generated when the operator rotates the pressing cam 445A.

[0093] According to the opening and closing device of the present embodiment, the same effects as those of the opening and closing device 301 of the fourth embodiment can be achieved.

[0094] It should be noted that the present disclosure is not limited to the configurations of the above-described embodiments. The invention indicated by the claims is not limited to the above-described embodiments only, and is intended to include all modifications within the meaning and scope equivalent to the claims. For example, the first pressing portion 333 of the fourth embodiment may have the same shape as the second pressing portion 443 of the fifth embodiment. That is, as shown in FIG. 38, a convex portion 333F may be provided on the base end side surface of the flange portion 333E on the tip end side, and a rectangular notch 333g may be formed in the flange portion 333E on the base end side. Then, as shown in FIG. 39, in the hemostasis portion 330, instead of the pressing cam 338A, a pressing cam 438A having the same shape as the pressing cam 445A may be used to open and close the hemostasis valve 32.

Explanation of Reference Numerals

[0095] 1, 101, 201, 301: Opening and closing device 21, 321: Case 41: Second holding portion 42: Fixed valve 42a: Third inner cavity 42b: Groove 42C: Fixed cylinder portion 43: Second pressing portion 43B: Pressing body 43F: Pressed portion 45, 145: Operating portion 45D: Inclined side portion 343, 443: Second pressing portion 343A: Pressing body 343B: Pressed portion 345: Second operating portion 345A, 445A: Pressing cam 345C: Operating lever C2, C3: Rotation axes

Claims

1. A case, a holding part provided in the case, a medical valve held by the holding part, normally in an open state, made of an elastic material and having a cylindrical shape with an inner cavity, an opening is formed in one end face in the axial direction, a groove whose depth direction is parallel to the axial direction, and an annular groove centered on the opening is formed on the end face, having a fixed cylinder part located between the inner cavity and the groove, the fixed cylinder part has a radial thickness that is thicker at a position where the depth of the groove is deeper than at a position where the groove is shallower, the medical valve, a pressing body having a cylindrical shape, supported movably along the axial direction of the medical valve with respect to the case, and configured to push the fixed cylinder part inward to narrow the inner cavity by entering the groove, and, the medical valve has an outer cylinder part and the fixed cylinder part, the outer cylinder part is press-fitted into the holding part so that the medical valve is held by the holding part, and the pressing body is configured to enter the groove between the outer cylinder part and the fixed cylinder part, the fixed cylinder part is configured such that the radial thickness increases stepwise outward from a position where the depth of the groove is shallow toward a position where the depth of the groove is deep, or is tapered from a position where the depth of the groove is deep toward a position where the groove is shallow, an opening / closing device for a medical valve.

2. a pressing part provided in the case, having a pressed part and the pressing body, an operating part supported movably along a direction orthogonal to the axial direction of the medical valve with respect to the case, and having an inclined part inclined with respect to the axial direction of the medical valve, and, By moving the operating part along a direction orthogonal to the axial direction of the medical valve, the inclined part presses the pressed part to move the pressing part and move the pressing body, the opening / closing device for a medical valve according to claim 1.

3. a pressing part provided in the case, having a pressed part and the pressing body, an operating part rotatably attached to the case, and, the operating part has a cam that abuts against the pressed part and has an outer peripheral surface whose distance from the rotation axis changes along the circumferential direction, By rotating the operating part, the cam rotates, and the outer peripheral surface presses the pressed part to move the pressing part and move the pressing body, the opening / closing device for a medical valve according to claim 1.

4. The operation unit has an operation lever connected to the cam, and a distance between a free end of the operation lever and the rotation shaft is configured to be longer than a distance between the rotation shaft and an outer peripheral surface of the cam. The opening and closing device for a medical valve according to claim 3.

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