Occlusion device and medical connector equipped with said occlusion device

Abstract

[Problem] To provide: an occlusion device for occluding a lumen of a tubular body by efficiently deforming the lumen of the tubular body; and a medical connector equipped with said occlusion device. [Solution] This occlusion device 2 comprises: a housing 3 having a wall part 3b including a first lumen 3g1 and a second lumen 3g2 which is formed on a tip side of the first lumen 3g1 and through which an insertion object such as a guide wire G can be inserted; an elastic member 5 that is provided to the first lumen 3g1 of the housing 3 and includes a base-side part 5b, a tip-side bulging part 5a that is disposed on the tip side of the base-side part 5b and has a larger outer diameter than the outer diameter of the base-side part 5b, and a third lumen 5g that penetrates through the base-side part 5b and the tip-side bulging part 5a and communicates with the second lumen 3g2; and a first pressing part 7 that is disposed on the base-side outer periphery of the tip-side bulging part 5a of the elastic member 5 and is capable of pressing the base of the tip-side bulging part 5a in the tip direction.

Description

Closure device and medical connector equipped with the closure device

[0001] The present invention relates to an occlusion device for occluding the lumen of a tubular body and a medical connector equipped with the occlusion device.

[0002] Catheters that are inserted into lumens such as blood vessels of a patient have been known for some time. The doctor performing the procedure inserts a guidewire into the lumen of the catheter, causes the tip of the guidewire to protrude from the tip of the catheter, guides the catheter to the lesion along the guidewire, and places a device such as a stent or an embolization coil into the lesion through the lumen of the catheter that has reached the lesion.

[0003] In addition, a medical connector is generally connected to the base end of the catheter, and this medical connector is configured to allow a guide wire to be inserted through an inner lumen that passes through from the base end to the tip end.

[0004] For example, Patent Document 1 is recognized to describe a connector 1 that includes a valve body 5 made of an elastic material in which a passage 51 having a constricted portion 52 is formed inside a cylindrical body 4, and that by grasping a handle 61 and pushing an operating body 6 into the cylindrical body 4, the inner diameter of the valve body 5 is reduced and deformed, and an instrument 15 inserted into the inner surface of the constricted portion 52 is fixed so that it cannot slide (see Figure 2, etc.).

[0005] Japanese Unexamined Patent Publication No. 7-163666

[0006] However, the connector 1 described in Patent Document 1 has a problem in that the inner diameter of the valve body 5 arranged in the same cylindrical body 4 is reduced and deformed by pushing the operating body 6 in the longitudinal direction of the cylindrical body 4, thereby reducing the inner diameter of the constricted portion 52. This means that the deformation efficiency is poor and leakage of blood, etc. cannot be sufficiently prevented during the procedure.

[0007] The present invention has been made in response to the above-mentioned problems of the prior art, and aims to provide an occlusion device for efficiently deforming the inner lumen of a tubular body to occlude the inner lumen of the tubular body, and a medical connector equipped with the occlusion device.

[0008] In order to solve the above-mentioned problems, the occlusion device of a first aspect of the present invention is characterized by comprising: a housing having a first inner cavity and a wall portion formed on one end side of the first inner cavity and having a second inner cavity formed so that an insert can be inserted; an elastic member provided in the first inner cavity of the housing, having an other end side portion, a one-end bulge portion arranged on the one end side of the other end side portion and having an outer diameter larger than the outer diameter of the other end side portion, and a third inner cavity that penetrates the other end side portion and the one-end bulge portion and communicates with the second inner cavity; and a first pressing portion arranged on the outer periphery of the other end side of the one-end bulge portion of the elastic member and that is capable of pressing the other end of the one-end bulge portion toward the one end.

[0009] In addition, a second aspect of the present invention is characterized in that, in the occlusion device of the first aspect, the elastic member is provided with a first protrusion in the third inner cavity of the one-end side bulge portion, protruding radially inward of the third inner cavity.

[0010] A third aspect of the present invention is characterized in that, in the closure device of the second aspect, the one-end bulge portion has a first surface whose normal extends toward the first protrusion portion.

[0011] A fourth aspect of the present invention is the closure device of the third aspect, characterized in that the first pressing portion is capable of pressing the first surface of the one-end side bulging portion.

[0012] A fifth aspect of the present invention is the closure device of the second aspect, characterized in that the wall portion has a second surface whose normal extends toward the first protrusion.

[0013] In addition, a sixth aspect of the present invention is characterized in that, in the blocking device of the third aspect, the wall portion has a second surface that is positioned closer to the one end than the first surface and whose normal extends toward the first protrusion.

[0014] In addition, a seventh aspect of the present invention is characterized in that, in the blocking device of the fourth aspect, the wall portion has a second surface that is positioned closer to the one end than the first surface and whose normal extends toward the first protrusion.

[0015] In addition, an eighth aspect of the present invention is characterized in that, in the blocking device of the first aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its abutment surface with the second pressing portion that protrudes toward the other end side of the second pressing portion.

[0016] A ninth aspect of the present invention is characterized in that, in the blocking device of the second aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its contact surface with the second pressing portion that protrudes toward the other end of the second pressing portion.

[0017] In addition, a tenth aspect of the present invention is characterized in that, in the blocking device of the third aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its abutment surface with the second pressing portion that protrudes toward the other end side of the second pressing portion.

[0018] An eleventh aspect of the present invention is characterized in that, in the blocking device of the fourth aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its contact surface with the second pressing portion that protrudes toward the other end of the second pressing portion.

[0019] In addition, a twelfth aspect of the present invention is characterized in that, in the blocking device of the fifth aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its contact surface with the second pressing portion that protrudes toward the other end side of the second pressing portion.

[0020] In addition, a thirteenth aspect of the present invention is characterized in that, in the blocking device of the sixth aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its contact surface with the second pressing portion that protrudes toward the other end side of the second pressing portion.

[0021] In addition, a fourteenth aspect of the present invention is characterized in that, in the blocking device of the seventh aspect, a second pressing portion is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion has a second protrusion on its abutment surface with the second pressing portion that protrudes toward the other end side of the second pressing portion.

[0022] In addition, a fifteenth aspect of the present invention is characterized in that, in the occlusion device of the eighth aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

[0023] In addition, a sixteenth aspect of the present invention is characterized in that, in the ninth aspect of the occlusion device, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

[0024] In addition, a 17th aspect of the present invention is characterized in that, in the occlusion device of the 10th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

[0025] In addition, an 18th aspect of the present invention is characterized in that, in the closure device of the 11th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

[0026] In addition, a 19th aspect of the present invention is characterized in that, in the occlusion device of the 12th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

[0027] Furthermore, a medical connector of the 20th aspect of the present invention comprises a closure device of any one of the first to nineteenth aspects, and the second inner cavity is capable of inserting another medical instrument, and the elastic member has the other end side portion arranged on the base end side of the housing and the one end side bulge portion arranged on the tip side of the other end side portion, and the first pressing portion is arranged on the base end side outer periphery of the one end side bulge portion of the elastic member and is capable of pressing the base end of the one end side bulge portion in the tip direction.

[0028] According to the first aspect of the closure device of the present invention, there is provided a housing having a first inner cavity and a wall portion formed on one end side of the first inner cavity and having a second inner cavity formed so that an insert can be inserted therethrough; an elastic member provided in the first inner cavity of the housing, having an other end side portion, a one-end bulge portion arranged on one end side of the other end side portion and having an outer diameter larger than the outer diameter of the other end side portion, and a third inner cavity that penetrates the other end side portion and the one-end bulge portion and communicates with the second inner cavity; and a first pressing portion arranged on the outer periphery of the other end side of the one-end bulge portion of the elastic member and that can press the other end of the one-end bulge portion toward the one end, thereby enabling the elastic member to be efficiently deformed to seal the third inner cavity.

[0029] Furthermore, according to the second aspect of the present invention, in the closure device of the first aspect, the elastic member is provided with a first protrusion that protrudes radially inward of the third inner cavity in the bulging portion on one end side, so that the elastic member can be deformed more efficiently to seal the third inner cavity.

[0030] Furthermore, according to the third aspect of the present invention, in the occlusion device of the second aspect, the one-end bulge portion has a first surface whose normal extends toward the first protrusion portion, thereby enabling the elastic member to be deformed more efficiently to seal the third lumen.

[0031] Furthermore, according to the fourth aspect of the present invention, in the occlusion device of the third aspect, the first pressing portion is capable of pressing the first surface of the one-end bulge portion, thereby more efficiently deforming the elastic member and sealing the third lumen.

[0032] Furthermore, according to the fifth aspect of the present invention, in the closure device of the second aspect, the wall portion has a second surface whose normal extends toward the first protrusion, so that the elastic member can be deformed more efficiently to seal the third lumen.

[0033] Furthermore, according to a sixth aspect of the present invention, in the closure device of the third aspect, the wall portion is positioned closer to one end than the first surface and has a second surface whose normal extends toward the first protrusion, so that the elastic member can be deformed more efficiently to seal the third lumen.

[0034] Furthermore, according to the seventh aspect of the present invention, in the closure device of the fourth aspect, the wall portion is positioned closer to one end than the first surface and has a second surface whose normal extends toward the first protrusion, so that the elastic member can be deformed more efficiently to seal the third lumen.

[0035] Furthermore, according to an eighth aspect of the present invention, the blocking device of the first aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0036] Furthermore, according to a ninth aspect of the present invention, the blocking device of the second aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0037] Furthermore, according to a tenth aspect of the present invention, the blocking device of the third aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0038] Furthermore, according to an eleventh aspect of the present invention, the blocking device of the fourth aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0039] Furthermore, according to a twelfth aspect of the present invention, the blocking device of the fifth aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0040] Furthermore, according to the thirteenth aspect of the present invention, the blocking device of the sixth aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0041] Furthermore, according to a fourteenth aspect of the present invention, the blocking device of the seventh aspect is provided with a second pressing portion that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing portion, and the first pressing portion is provided with a second protrusion that protrudes toward the other end of the second pressing portion on its contact surface with the second pressing portion, so that the elastic member can be deformed more efficiently to seal the third lumen without being affected by the rotation of the second pressing portion.

[0042] Furthermore, according to the 15th aspect of the present invention, in the blocking device of the 8th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough, so that the elastic member can be deformed more efficiently to seal the third inner cavity without being affected by the rotation of the second pressing portion.

[0043] Furthermore, according to the 16th aspect of the present invention, in the closure device of the 9th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough, so that the elastic member can be deformed more efficiently to seal the third inner cavity without being affected by the rotation of the second pressing portion.

[0044] Furthermore, according to the 17th aspect of the present invention, in the closure device of the 10th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough, so that the elastic member can be deformed more efficiently to seal the third inner cavity without being affected by the rotation of the second pressing portion.

[0045] Furthermore, according to the 18th aspect of the present invention, in the closure device of the 11th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough, so that the elastic member can be deformed more efficiently to seal the third inner cavity without being affected by the rotation of the second pressing portion.

[0046] Furthermore, according to the 19th aspect of the present invention, in the closure device of the 12th aspect, the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough, so that the elastic member can be deformed more efficiently to seal the third inner cavity without being affected by the rotation of the second pressing portion.

[0047] Furthermore, according to the 20th aspect of the medical connector of the present invention, the medical connector is equipped with a blocking device of any one of the first to 19th aspects, the second inner cavity is capable of inserting another medical instrument, the other end side portion of the elastic member is arranged on the base end side of the housing, the one end side bulge portion is arranged on the tip side of the other end side portion, and the first pressing portion is arranged on the base end side outer periphery of the one end side bulge portion of the elastic member and is capable of pressing the base end of the one end side bulge portion in the tip direction, so that the medical connector can be used as a medical connector that efficiently deforms the elastic member to seal the third inner cavity.

[0048] 3 is an overall view of a catheter using a medical connector equipped with a blocking device of a first embodiment of the present invention. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a first embodiment before lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a first embodiment after lumen closure. FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 3. FIG. 3 is a cross-sectional view taken along the line B-B of FIG. 3. FIG. 3 is a cross-sectional view taken along the line C-C of FIG. 3. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a second embodiment before lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a second embodiment after lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a third embodiment before lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a third embodiment after lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a fourth embodiment before lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a fourth embodiment after ... fifth embodiment before lumen closure. FIG. 3 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of a fifth embodiment after lumen closure.

[0049] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0050] First Embodiment First, a first embodiment of the present invention will be described. Note that the drawings used in this embodiment are exaggerated for ease of understanding, and the dimensions are different from the actual dimensions.

[0051] Furthermore, in this embodiment and the embodiments described below, for convenience of explanation, the +X and -X directions in the drawings of the closure device and the medical connector equipped with the closure device are defined as the longitudinal directions, with the +X direction being the base end side and the -X direction being the tip end side.

[0052] Furthermore, in this embodiment and the embodiments described below, only the case where the occlusion device of the present invention is used in a medical connector is described, but the object for which the occlusion device of the present invention is used is not limited to a medical connector, and it can be applied to any tubular member having an inner lumen.

[0053] Furthermore, in this embodiment and the embodiments described below, only the case where the occlusion device of the present invention is used in a medical connector having one lumen is described, but the occlusion device of the present invention is not limited to medical connectors having one lumen, and can also be used in each lumen of a medical connector having multiple lumen, such as a so-called Y-shaped connector.

[0054] FIG. 1 is an overall view of a catheter using a medical connector equipped with a blocking device according to a first embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of the medical connector equipped with the blocking device before the lumen is blocked, and FIG. 3 is a longitudinal cross-sectional view of the medical connector equipped with the blocking device after the lumen is blocked.

[0055] 4 is a cross-sectional view taken along line AA in FIG. 3, FIG. 5 is a cross-sectional view taken along line BB in FIG. 3, and FIG. 6 is a cross-sectional view taken along line CC in FIG.

[0056] As shown in FIG. 1, the medical connector 1 of this embodiment is used in a catheter 100 that is composed of a long, hollow, approximately cylindrical catheter body 4b, a distal tip 4a connected to the distal end of the catheter body 4b, and a medical connector 1 connected to the proximal end of the catheter body 4b. FIG. 1 shows the medical connector 1 in a state in which the catheter 100 has a guide wire G inserted into its lumen.

[0057] As described above, the catheter main body 4b has a long, hollow, generally cylindrical shape and has an internal cavity 4g (see FIG. 2). Although not shown, the catheter main body 4b generally comprises an inner layer, a braid wound around the outer periphery of the inner layer, and an outer layer covering the inner layer and the braid.

[0058] The inner layer is a long, hollow tubular body made of resin, and has a cavity 4g formed therein for inserting an insert such as a guide wire G. The resin material forming the inner layer is not particularly limited as long as it is a biocompatible material, but in this embodiment, PTFE (polytetrafluoroethylene) is used.

[0059] The braid is made up of 12 first wires and 12 second wires, for a total of 24 wires (12 x 12 wires), which are alternately woven into a mesh and wound around the outer periphery of the inner layer. The material constituting the braid is not particularly limited as long as it is a biocompatible material, but in this embodiment, a stainless steel alloy is used.

[0060] The outer layer is made of resin and covers the inner layer and the braid. The resin material forming the outer layer is not particularly limited as long as it is a biocompatible material, but polyamide, polyamide elastomer, polyester, polyurethane, etc. can be used, and in this embodiment, polyamide is used.

[0061] The distal tip 4a has a hollow, generally conical shape with a tapered outer periphery whose outer diameter gradually decreases toward the most distal end, and has an internal cavity that communicates with the cavity 4g in the catheter body 4b. The resin material from which the distal tip 4a is made is not particularly limited as long as it is a biocompatible material, but in this embodiment, polyurethane elastomer is used.

[0062] As shown in Figures 1 to 6, the medical connector 1 is connected to the base end of the catheter main body 4b, and includes a medical connector distal end 6 connected to the base end of the catheter main body 4b, an occlusion device 2 connected to the base end of the medical connector distal end 6, and a plug ner 8 disposed inside the base end side of the medical connector distal end 6, the base end of which abuts against the tip of the occlusion device 2.

[0063] The medical connector tip portion 6 has a hollow, approximately cylindrical shape, and is connected to the base end of the catheter main body 4b at its tip side.A plug liner 8 is disposed inside the base end side so as to cover the base end of the catheter main body 4b.The base end side is provided with a connector base portion 6a having a threaded portion on its outer periphery for connecting the tip portion of the occlusion device 2.

[0064] The material for forming the medical connector tip 6 is not particularly limited, but resin materials such as ABS resin, polyacetal (POM), polycarbonate (PC), polypropylene (PP), polyethylene (PE), PEEK resin, polyphenylene sulfide (PPS), polyetherimide (PEI), etc. can be used, and in this embodiment, ABS resin is used.

[0065] The plug ner 8 is used to tightly contact the occlusion device 2 with the distal end 6 of the medical connector when connecting the occlusion device 2 to the distal end 6 of the medical connector, and has a generally cylindrical shape with an outer diameter larger than that of the catheter body 4b at the distal end and a generally truncated cone shape at the proximal end that widens in diameter toward the proximal end.

[0066] The material for forming the plug liner 8 is not particularly limited, but resin materials such as silicone rubber, thermoplastic elastomer, and natural rubber can be used, and in this embodiment, silicone rubber is used.

[0067] The occlusion device 2 of this embodiment is capable of sealing against liquids such as blood that infiltrate from the distal end side to the proximal end side, or from the proximal end side to the distal end side, and as shown in Figures 1 to 6, is connected to the proximal end of the medical connector distal end 6 and comprises a housing 3, an elastic member 5 arranged inside the proximal end side of the housing 3, a first pressing portion 7 that can press the elastic member 5 from the proximal end side toward the distal end, and a second pressing portion 9 that is connected to the proximal end of the housing 3 and can press the first pressing portion 7 toward the distal end.

[0068] The housing 3 has a hollow, generally cylindrical shape and includes a first inner cavity 3g1, a wall portion 3b formed on the tip side (corresponding to the "one end side" of the present invention) of the first inner cavity 3g1 and having a second inner cavity 3g2 formed so that an insert such as a guide wire G can be inserted therethrough, a housing tip portion 3a having a threaded portion on its inner periphery for screwing onto the connector base end portion 6a, and a housing base end portion 3c having a threaded portion on its outer periphery for connecting the tip portion of the second pressing portion 9.

[0069] The first inner cavity 3g1 of this embodiment comprises a distal inner cavity having an approximately spherical shape, and a proximal inner cavity having an approximately cylindrical shape that is formed continuously from the distal inner cavity and extends from both ends of the spherical shape of the distal inner cavity toward the proximal end.

[0070] The wall 3b in this embodiment has a substantially spherical recess on the proximal end side that forms the first lumen 3g1, and a flat surface on the distal end side that abuts against the plug liner 8. The second lumen 3g2 is formed in a substantially cylindrical shape extending longitudinally through the center of the wall 3b, and has an inner diameter that allows an insert such as a guide wire G to be inserted therethrough.

[0071] The material for forming the housing 3 is not particularly limited, but resin materials such as ABS resin, polyacetal (POM), polycarbonate (PC), polypropylene (PP), polyethylene (PE), PEEK resin, polyphenylene sulfide (PPS), polyetherimide (PEI), etc. can be used, and in this embodiment, ABS resin is used.

[0072] The elastic member 5 is provided in the first inner cavity 3g1 of the housing 3, and comprises a hollow, approximately cylindrical base end side portion 5b (corresponding to the ``other end side'' of the present invention), a tip end side bulge portion 5a (corresponding to the ``one end side'' of the present invention) that is formed continuously with the tip side of the base end side portion 5b (corresponding to the ``one end side'' of the present invention) and has an approximately spherical shape and an outer diameter larger than the outer diameter of the base end side portion 5b, and a third inner cavity 5g that penetrates the base end side portion 5b and the tip end side bulge portion 5a and is connected to the second inner cavity 3g2.

[0073] The distal bulge 5a has an approximately spherical shape to conform to the distal lumen shape of the first lumen 3g1, and the proximal side portion 5b has an approximately cylindrical shape extending toward the proximal end from a position a predetermined distance toward the center from both ends of the distal bulge 5a.

[0074] The third lumen 5g has an approximately cylindrical shape with approximately the same diameter as the second lumen 3g2 at the distal bulge portion 5a, but in order to make it easier to insert an insert such as a guide wire G from the proximal end of the occlusion device 2, the diameter expands toward the proximal end of the occlusion device 2 at the proximal side portion 5b.

[0075] The material for forming the elastic member 5 is not particularly limited, but resin materials such as silicone rubber, thermoplastic elastomer, and natural rubber can be used, and in this embodiment, silicone rubber is used.

[0076] The first pressing portion 7 in this embodiment has a hollow, approximately cylindrical shape that covers the outer periphery of the base-end side portion 5b and is configured to be able to press the tip-side bulge portion 5a of the elastic member 5 from the base-end side toward the tip.It is arranged so as to be able to move longitudinally within the base-end side inner cavity of the first inner cavity 3g1 and is equipped with a first pressing tip portion 7a that has an approximately spherical surface that follows the outer shape of the tip-side bulge portion 5a, and a second protrusion 7b that is formed radially outward from the base-end side portion 5b and protrudes toward the base-end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9 described later.

[0077] As shown in FIG. 6, the second protrusion 7b has a contact area that is minimized so that the rotational force of the second pressing portion 9 (described later) is not transmitted to the first pressing portion 7 as much as possible, and has a hollow, approximately cylindrical shape with a small thickness when viewed in cross section (see the lattice-shaped portion in FIG. 6).

[0078] The material for forming the first pressing portion 7 is not particularly limited, but resin materials such as polyacetal (POM), monomer cast nylon (MC nylon), ultra-high molecular weight polyethylene (PE), PEEK resin, polytetrafluoroethylene (PTFE), etc. can be used, and in this embodiment, polyacetal (POM) is used.

[0079] The second pressing portion 9 has a hollow, approximately cylindrical shape that covers the outer periphery of the elastic member 5 and the first pressing portion 7, and is configured to be able to press the first pressing portion 7 in the distal direction.The second pressing portion 9 is equipped with a second pressing base end portion 9b that abuts against the first pressing portion 7 and can press the first pressing portion 7 in the distal direction, a second pressing tip portion 9a that has a threaded portion on its inner periphery for screwing into the housing base end portion 3c of the housing 3, a fourth inner cavity 9g1 formed so that the base end side portion 5b of the elastic member 5 can be inserted therethrough, and a fifth inner cavity 9g2 formed between the second pressing portion 9 and the first pressing portion 7.

[0080] The material for forming the second pressing portion 9 is not particularly limited, but resin materials such as ABS resin, polyacetal (POM), polycarbonate (PC), polypropylene (PP), polyethylene (PE), PEEK resin, polyphenylene sulfide (PPS), polyetherimide (PEI), etc. can be used, and in this embodiment, ABS resin is used.

[0081] Therefore, the medical connector of this embodiment and the embodiments described below is specifically configured such that an occlusion device is screwed onto the base end of the medical connector tip portion 6, which has a plug liner 8 housed inside the base end, an elastic member is housed in the first inner cavity of the occlusion device, and the second pressing portion 9 is screwed onto the base end of the occlusion device, with the first pressing portion housed between the elastic member, the housing, and the second pressing portion 9.

[0082] A description will now be given of a mode in which the third lumen 5g is blocked or released using the above-described blocking device 2. First, a description will be given of a case in which the third lumen 5g is blocked using the blocking device 2 of this embodiment.

[0083] When the third lumen 5g is to be occluded using the occlusion device 2, the second pressing portion 9 is rotated so that it moves distally. Then, the second pressing portion 9 moves distally via the threaded portion between the second pressing distal portion 9a and the housing base end 3c, and the first pressing portion 7 moves distally, compressing the distal bulge 5a of the elastic member 5 and occluding the third lumen 5g as shown in FIG. 3 .

[0084] Note that Figure 3 is a longitudinal cross-sectional view of the medical connector 1 equipped with the blocking device 2 after the lumen has been blocked, showing the state in which the guide wire G has been removed. However, even if the guide wire G is inserted, it is clear that the elastic member 5 adheres closely to the guide wire G, resulting in an entirely sealed state.

[0085] Next, a case where the third lumen 5g is opened using the occlusion device 2 of this embodiment will be described.

[0086] When using the occlusion device 2 to open the third lumen 5g, the second pressing portion 9 is rotated so that it moves toward the proximal end, in contrast to when occluding the third lumen 5g. Then, the second pressing portion 9 moves toward the proximal end due to the threaded portion between the second pressing tip portion 9a and the housing proximal end portion 3c, which allows the first pressing portion 7 to move toward the proximal end, and the compressed state of the elastic member 5 is released, thereby opening the third lumen 5g.

[0087] According to the occlusion device 2 of this embodiment, there is provided a housing 3 having a first lumen 3g1 and a wall portion 3b having a second lumen 3g2 formed on the distal side of the first lumen 3g1 and configured to allow an insert such as a guide wire G to be inserted therethrough; an elastic member 5 provided in the first lumen 3g1 of the housing 3 and having a base-end side portion 5b, a tip-side bulge 5a arranged on the distal side of the base-end side portion 5b and having an outer diameter larger than the outer diameter of the base-end side portion 5b, and a third lumen 5g passing through the base-end side portion 5b and the tip-side bulge 5a and communicating with the second lumen 3g2; and a first pressing portion 7 arranged on the proximal outer periphery of the tip-side bulge 5a of the elastic member 5 and capable of pressing the base end of the tip-side bulge 5a in the distal direction, thereby enabling the elastic member 5 to be efficiently deformed to seal the third lumen 5g.

[0088] Furthermore, according to the occlusion device 2 of this embodiment, the second pressing portion 9 is rotatably connected to the base end of the housing 3 and is capable of pressing the base end of the first pressing portion 7, and the first pressing portion 7 is provided with a second protrusion 7b that protrudes toward the base end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9. Therefore, the elastic member 5 can be deformed more efficiently to seal the third lumen 5g without being affected by the rotation of the second pressing portion 9.

[0089] Furthermore, according to the occlusion device 2 of this embodiment, the second pressing portion 9 has a fourth inner cavity 9g1 formed so that the base end side portion 5b of the elastic member 5 can be inserted therethrough, and therefore the elastic member 5 can be deformed more efficiently to seal the third inner cavity 5g without being affected by the rotation of the second pressing portion 9.

[0090] Furthermore, according to the medical connector 1 of this embodiment, the medical connector 1 is equipped with a blocking device 2, the second inner cavity 3g2 is capable of inserting an insert such as a guide wire, the base end side portion 5b of the elastic member 5 is arranged on the base end side of the housing 3, the tip side bulge portion 5a is arranged on the tip side of the base end side portion 5b, and the first pressing portion 7 is arranged on the base end side outer periphery of the tip side bulge portion 5a of the elastic member 5 and can press the base end of the tip side bulge portion 5a in the tip direction, so that the medical connector 1 can be used as a medical connector that efficiently deforms the elastic member 5 to seal the third inner cavity 5g.

[0091] Second Embodiment Next, a second embodiment of the present invention will be described. Note that the drawings used in this embodiment are also exaggerated to facilitate understanding, and the dimensions are different from the actual dimensions.

[0092] A second embodiment of the present invention will be described below, but parts common to the first embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0093] The occluding device 12 of this embodiment differs from the occluding device 2 of the first embodiment in that it has a first protrusion 15c in the third lumen 15g.

[0094] FIG. 7 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the second embodiment before the lumen is blocked, and FIG. 8 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the second embodiment after the lumen is blocked.

[0095] As shown in Figures 7 and 8, the medical connector 10 of this embodiment is used in a catheter that is composed of a long, hollow, approximately cylindrical catheter body 4b, a distal tip 4a connected to the distal end of the catheter body 4b, and a medical connector 10 connected to the proximal end of the catheter body 4b.

[0096] As shown in Figures 7 and 8, the medical connector 10 is connected to the base end of the catheter main body 4b, and includes a medical connector distal end 6 connected to the base end of the catheter main body 4b, an occlusion device 12 connected to the base end of the medical connector distal end 6, and a plug ner 8 disposed inside the base end side of the medical connector distal end 6, the base end of which abuts against the tip of the occlusion device 12.

[0097] As shown in Figures 7 and 8, the occlusion device 12 of this embodiment is connected to the base end of the medical connector tip 6, and includes a housing 3, an elastic member 15 arranged inside the base end side of the housing 3, a first pressing portion 7 that can press the elastic member 15 from the base end side toward the tip, and a second pressing portion 9 that is connected to the base end of the housing 3 and can press the first pressing portion 7 toward the tip.

[0098] The elastic member 15 is provided in the first inner cavity 3g1 of the housing 3 and comprises a hollow, approximately cylindrical base end side portion 15b (corresponding to the ``other end side portion'' of the present invention), a tip end side bulge portion 15a (corresponding to the ``one end side'' of the present invention) that is formed continuously with the tip side of the base end side portion 15b (corresponding to the ``one end side'' of the present invention) and is approximately spherical and has an outer diameter larger than the outer diameter of the base end side portion 15b, a third inner cavity 15g that penetrates the base end side portion 15b and the tip end side bulge portion 15a and communicates with the second inner cavity 3g2, and a first protrusion 15c that is located approximately in the center of the tip end side bulge portion 15a of the third inner cavity 15g and protrudes radially inward of the third inner cavity 15g.

[0099] The distal bulge 15a has an approximately spherical shape that conforms to the distal lumen shape of the first lumen 3g1, and the proximal side portion 15b has an approximately cylindrical shape that extends toward the proximal end from a position a predetermined distance toward the center from both ends of the distal bulge 15a.

[0100] The third lumen 15g has an approximately cylindrical shape with approximately the same diameter as the second lumen 3g2 at the distal bulge 15a, except for the first protrusion 15c, but in order to make it easier to insert an insert such as a guide wire G from the proximal end of the occlusion device 12, the diameter expands toward the proximal end of the occlusion device 12 at the proximal side portion 15b.

[0101] The first protrusion 15c has an approximately hollow disk shape in cross section, and as described above, is located approximately in the center of the tip-side bulge 15a in the third inner cavity 15g, protrudes radially inward of the third inner cavity 15g, and has an inner diameter smaller than that of the second inner cavity 3g2.

[0102] The elastic member 15 can be made of the same material as the elastic member 5 of the first embodiment, and in this embodiment, silicone rubber is used.

[0103] When the above-described occlusion device 12 is used to occlude the third lumen 15g, the second pressing portion 9 is rotated so as to move the second pressing portion 9 toward the distal end. By moving the second pressing portion 9 toward the distal end and the first pressing portion 7 toward the distal end, the distal bulge 15a of the elastic member 15 is compressed, and the gap of the first protrusion 15c of the third lumen 15g is occluded as shown in FIG. 8 .

[0104] Note that Figure 8 is a longitudinal cross-sectional view of the medical connector 10 equipped with the occlusion device 12 after the lumen has been occluded, showing the state after the guide wire G has been removed. However, even when the guide wire G is inserted, it is clear that the elastic member 15 adheres closely to the guide wire G, resulting in an entirely sealed state.

[0105] On the other hand, when using the occlusion device 12 to open the third lumen 15g, the second pressing portion 9 is rotated so as to move toward the proximal end, which is the opposite of the case of occluding the third lumen 15g. By moving the second pressing portion 9 toward the proximal end and allowing the first pressing portion 7 to move toward the proximal end, the compressed state of the elastic member 15 is released, thereby opening the first protruding portion 15c of the third lumen 15g.

[0106] According to the occlusion device 12 of this embodiment, there is provided a housing 3 having a first lumen 3g1 and a wall portion 3b having a second lumen 3g2 formed on the distal side of the first lumen 3g1 and configured to allow an insert such as a guide wire G to be inserted therethrough; an elastic member 15 provided in the first lumen 3g1 of the housing 3 and including a base-end side portion 15b, a tip-side bulge 15a arranged on the distal side of the base-end side portion 15b and having an outer diameter larger than the outer diameter of the base-end side portion 15b, and a third lumen 15g passing through the base-end side portion 15b and the tip-side bulge 15a and communicating with the second lumen 3g2; and a first pressing portion 7 arranged on the proximal outer periphery of the tip-side bulge 15a of the elastic member 15 and capable of pressing the base end of the tip-side bulge 15a in the distal direction, thereby enabling the elastic member 15 to be efficiently deformed to seal the third lumen 15g.

[0107] Furthermore, according to the occlusion device 12 of this embodiment, the elastic member 15 has a first protrusion 15c that protrudes radially inward from the third inner cavity 15g of the tip-side bulge portion 15a, so that the elastic member 15 can be deformed more efficiently to seal the third inner cavity 15g.

[0108] Furthermore, according to the occlusion device 12 of this embodiment, the second pressing portion 9 is rotatably connected to the base end of the housing 3 and is capable of pressing the base end of the first pressing portion 7, and the first pressing portion 7 is provided with a second protrusion 7b that protrudes toward the base end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9. Therefore, the elastic member 15 can be deformed more efficiently to seal the third lumen 15g without being affected by the rotation of the second pressing portion 9.

[0109] Furthermore, according to the occlusion device 12 of this embodiment, the second pressing portion 9 has a fourth inner cavity 9g1 formed so that the base end side portion 15b of the elastic member 15 can be inserted therethrough, and therefore the elastic member 15 can be deformed more efficiently to seal the third inner cavity 15g without being affected by the rotation of the second pressing portion 9.

[0110] Furthermore, according to the medical connector 10 of this embodiment, the medical connector 10 is equipped with an occlusion device 12, the second inner cavity 3g2 is capable of inserting an insert such as a guide wire, the base end side portion 15b of the elastic member 15 is arranged on the base end side of the housing 3, the tip side bulge portion 15a is arranged on the tip side of the base end side portion 15b, and the first pressing portion 7 is arranged on the base end side outer periphery of the tip side bulge portion 15a of the elastic member 15 and can press the base end of the tip side bulge portion 15a in the tip direction, so that the medical connector 10 can be used as a medical connector that efficiently deforms the elastic member 15 to seal the third inner cavity 15g.

[0111] Third Embodiment Next, a third embodiment of the present invention will be described. Note that the drawings used in this embodiment are also exaggerated to facilitate understanding, and the dimensions are different from the actual dimensions.

[0112] A third embodiment of the present invention will be described below, but parts common to the first embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0113] The closing device 22 of this embodiment differs from the closing device 12 of the second embodiment in the shapes of the housing, the elastic member, and the first pressing portion.

[0114] FIG. 9 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the third embodiment before the lumen is blocked, and FIG. 10 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the third embodiment after the lumen is blocked.

[0115] As shown in Figures 9 and 10, the medical connector 20 of this embodiment is used in a catheter that is composed of a long, hollow, approximately cylindrical catheter body 4b, a distal tip 4a connected to the distal end of the catheter body 4b, and a medical connector 20 connected to the proximal end of the catheter body 4b.

[0116] As shown in Figures 9 and 10, the medical connector 20 is connected to the base end of the catheter main body 4b, and includes a medical connector distal end 6 connected to the base end of the catheter main body 4b, an occlusion device 22 connected to the base end of the medical connector distal end 6, and a plug ner 8 disposed inside the base end side of the medical connector distal end 6, the base end of which abuts against the tip of the occlusion device 22.

[0117] As shown in Figures 9 and 10, the occlusion device 22 of this embodiment is connected to the base end of the medical connector tip 6, and includes a housing 23, an elastic member 25 arranged inside the base end side of the housing 23, a first pressing portion 27 that can press the elastic member 25 from the base end side toward the tip, and a second pressing portion 9 that is connected to the base end of the housing 23 and can press the first pressing portion 27 toward the tip.

[0118] The housing 23 has a hollow, approximately cylindrical shape and includes a first inner cavity 23g1, a wall portion 23b formed on the tip side (corresponding to the "one end side" of the present invention) of the first inner cavity 23g1 and having a second inner cavity 23g2 formed so that an insert such as a guide wire G can be inserted therethrough, a housing tip portion 23a having a threaded portion on its inner circumference for connecting the connector base end 6a, a housing base end portion 23c having a threaded portion on its outer circumference for connecting the tip end of the second pressing portion 9, and a second surface 23d having an approximately truncated cone shape whose normal extends toward the first protrusion 25c described later.

[0119] The first inner cavity 23g1 of this embodiment comprises a distal inner cavity having an approximately truncated cone shape, and a proximal inner cavity having an approximately cylindrical shape that is formed continuously from the distal inner cavity and extends from both ends of the approximately truncated cone shape of the distal inner cavity toward the proximal end.

[0120] The wall portion 23b in this embodiment has a recessed portion on the proximal end side that is substantially frustoconical, forming a first lumen 23g1, and a flat surface on the distal end side that abuts against the plug end 8. The second lumen 23g2 is formed in a substantially cylindrical shape extending longitudinally from the center of the wall portion 23b, and has an inner diameter that allows an insert such as a guide wire G to be inserted therethrough.

[0121] The housing 23 can be made of the same material as the housing 3 of the first embodiment, and in this embodiment, ABS resin is used.

[0122] The elastic member 25 is provided in the first inner cavity 23g1 of the housing 23, and comprises a hollow, approximately cylindrical base end side portion 25b (corresponding to the ``other end side portion'' of the present invention), a tip end side bulge 25a (corresponding to the ``one end side'' of the present invention) that is formed continuously with the tip side of the base end side portion 25b (corresponding to the ``one end side'' of the present invention) and has an outer diameter larger than the outer diameter of the base end side portion 25b, a third inner cavity 25g that penetrates the base end side portion 25b and the tip end side bulge 25a and communicates with the second inner cavity 23g2, a first protrusion 25c that is located approximately in the center of the tip end side bulge 25a of the third inner cavity 25g and protrudes radially inward of the third inner cavity 25g, and a first surface 25d that is approximately truncated cone in shape and whose normal extends toward the first protrusion 25c.

[0123] The tip-side bulge portion 25a has an approximately truncated cone shape on the tip side and an approximately cylindrical shape on the base end side to conform to the tip-side lumen shape of the first lumen 23g1, and the base-end side portion 25b has an approximately cylindrical shape extending toward the base end from a position a predetermined distance toward the center from both ends of the tip-side bulge portion 25a.

[0124] The third lumen 25g has an approximately cylindrical shape with approximately the same diameter as the second lumen 3g2 at the distal bulge 25a, except for the first protrusion 25c, but in order to make it easier to insert an insert such as a guide wire G from the proximal end of the occlusion device 22, the diameter expands at the proximal side portion 25b toward the proximal end of the occlusion device 22.

[0125] The first protrusion 25c has an approximately hollow disk shape in cross section, and as described above, is located approximately in the center of the tip-side bulge 25a in the third inner cavity 25g, protrudes radially inward of the third inner cavity 25g, and has an inner diameter smaller than that of the second inner cavity 23g2.

[0126] The elastic member 25 can be made of the same material as the elastic member 5 of the first embodiment, and in this embodiment, silicone rubber is used.

[0127] The first pressing portion 27 in this embodiment has a hollow, approximately cylindrical shape that covers the outer periphery of the base-end side portion 25b and is configured to be able to press the tip-side bulge portion 25a of the elastic member 25 from the base-end side toward the tip.It is arranged so as to be able to move longitudinally within the base-end inner cavity of the first inner cavity 23g1 and is equipped with a first pressing tip portion 27a that has an approximately vertical plane that follows the outer shape of the tip-side bulge portion 25a (the base end of the tip-side bulge portion 25a has an approximately vertical surface, unlike the first surface 25d), and a second protrusion 27b that is formed radially outward from the base-end side portion 25b and protrudes toward the base-end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9.

[0128] In addition, like the second protrusion 7b of the first embodiment, the second protrusion 27b has a contact area that is made as small as possible so that the rotational force of the second pressing portion 9 is not transmitted to the first pressing portion 27 as much as possible, and when viewed in cross section, it has a hollow, approximately cylindrical shape with a short thickness.

[0129] The material for forming the first pressing portion 27 can be the same as that for the first pressing portion 7 in the first embodiment, and in this embodiment, polyacetal (POM) is used.

[0130] When the above-described occlusion device 22 is used to occlude the third lumen 25g, the second pressing portion 9 is rotated to move toward the distal end. By moving the second pressing portion 9 toward the distal end and the first pressing portion 27 toward the distal end, the distal bulge 25a of the elastic member 25 is compressed, and the gap of the first protrusion 25c of the third lumen 25g is closed as shown in FIG.

[0131] Note that Figure 10 is a longitudinal cross-sectional view of the medical connector 20 equipped with the occlusion device 22 after the lumen has been occluded, and shows the state after the guide wire G has been removed. However, even when the guide wire G is inserted, it is clear that the elastic member 25 adheres closely to the guide wire G, resulting in an entirely sealed state.

[0132] On the other hand, when using the occlusion device 22 to open the third lumen 25g, the second pressing portion 9 is rotated so as to move toward the proximal end, which is the opposite of the case of occluding the third lumen 25g. By moving the second pressing portion 9 toward the proximal end and allowing the first pressing portion 27 to move toward the proximal end, the compressed state of the elastic member 25 is released, thereby opening the first protruding portion 25c of the third lumen 25g.

[0133] According to the occlusion device 22 of this embodiment, the occlusion device 22 includes a housing 23 having a first lumen 23g1 and a wall portion 23b formed on the distal side of the first lumen 23g1 and having a second lumen 23g2 formed so that an insert such as a guide wire G can be inserted therethrough, and a proximal side portion 25b and a distal side portion 25b provided in the first lumen 23g1 of the housing 23 and disposed on the distal side of the proximal side portion 25b and having an outer diameter larger than the outer diameter of the proximal side portion 25b. The elastic member 25 has a bulging portion 25a and a third inner cavity 25g that penetrates the base end side portion 25b and the tip side bulging portion 25a and communicates with the second inner cavity 23g2, and a first pressing portion 27 that is arranged on the base end side outer periphery of the tip side bulging portion 25a of the elastic member 25 and can press the base end of the tip side bulging portion 25a toward the tip side, so that the elastic member 25 can be efficiently deformed to seal the third inner cavity 25g.

[0134] Furthermore, according to the occlusion device 22 of this embodiment, the elastic member 25 is provided with a first protrusion 25c that protrudes radially inward from the third inner cavity 25g of the tip-side bulge portion 25a, so that the elastic member 25 can be deformed more efficiently to seal the third inner cavity 25g.

[0135] Furthermore, according to the occlusion device 22 of this embodiment, the tip-side bulge portion 25a has a first surface 25d whose normal extends toward the first protrusion 25c, so that the elastic member 25 can be deformed more efficiently to seal the third lumen 25g.

[0136] Furthermore, according to the occlusion device 22 of this embodiment, the wall portion 23d has a second surface 23d whose normal extends toward the first protrusion portion 25c, so that the elastic member 25 can be deformed more efficiently to seal the third lumen 25g.

[0137] Furthermore, according to the occlusion device 22 of this embodiment, the second pressing portion 9 is rotatably connected to the base end of the housing 23 and is capable of pressing the base end of the first pressing portion 27, and the first pressing portion 27 is provided with a second protrusion 27b that protrudes toward the base end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9. Therefore, the elastic member 25 can be deformed more efficiently to seal the third lumen 25g without being affected by the rotation of the second pressing portion 9.

[0138] Furthermore, according to the blocking device 22 of this embodiment, the second pressing portion 9 has a fourth inner cavity 9g1 formed so that the base end side portion 25b of the elastic member 25 can be inserted therethrough, and therefore the elastic member 25 can be deformed more efficiently to seal the third inner cavity 25g without being affected by the rotation of the second pressing portion 9.

[0139] Furthermore, according to the medical connector 20 of this embodiment, the medical connector 20 is equipped with a blocking device 22, and the second inner cavity 23g2 is capable of inserting an insert such as a guide wire, and the elastic member 25 has a base end side portion 25b arranged on the base end side of the housing 23 and a tip end bulge portion 25a arranged on the tip side of the base end side portion 25b, and the first pressing portion 27 is arranged on the base end side outer periphery of the tip end bulge portion 25a of the elastic member 25 and can press the base end of the tip end bulge portion 25a in the tip direction, so that the medical connector 20 can be used as a medical connector that efficiently deforms the elastic member 25 to seal the third inner cavity 25g.

[0140] Fourth Embodiment Next, a fourth embodiment of the present invention will be described. Note that the drawings used in this embodiment are also exaggerated to facilitate understanding, and the dimensions are different from the actual dimensions.

[0141] A third embodiment of the present invention will be described below, but parts common to the first embodiment will be given the same reference numerals and descriptions thereof will be omitted.

[0142] The closing device 32 of this embodiment differs from the closing device 12 of the second embodiment in the shapes of the housing, the elastic member, and the first pressing portion.

[0143] FIG. 11 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the fourth embodiment before the lumen is blocked, and FIG. 12 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the fourth embodiment after the lumen is blocked.

[0144] As shown in Figures 11 and 12, the medical connector 30 of this embodiment is used in a catheter that is composed of a long, hollow, approximately cylindrical catheter body 4b, a distal tip 4a connected to the distal end of the catheter body 4b, and a medical connector 30 connected to the proximal end of the catheter body 4b.

[0145] As shown in Figures 11 and 12, the medical connector 30 is connected to the base end of the catheter main body 4b, and includes a medical connector distal end 6 connected to the base end of the catheter main body 4b, an occlusion device 32 connected to the base end of the medical connector distal end 6, and a plug ner 8 disposed inside the base end side of the medical connector distal end 6, the base end of which abuts against the tip of the occlusion device 32.

[0146] As shown in Figures 11 and 12, the occlusion device 32 of this embodiment is connected to the base end of the medical connector tip 6, and includes a housing 33, an elastic member 35 arranged inside the base end side of the housing 33, a first pressing portion 37 that can press the elastic member 35 from the base end side toward the tip, and a second pressing portion 9 that is connected to the base end of the housing 33 and can press the first pressing portion 37 toward the tip.

[0147] The housing 33 has a hollow, approximately cylindrical shape and includes a first inner cavity 33g1 that is also approximately cylindrical overall, a wall portion 33b that is formed on the tip side (corresponding to the ``one end side'' of the present invention) of the first inner cavity 33g1 and has a second inner cavity 33g2 that is formed so that an insert such as a guide wire G can be inserted therethrough, a housing tip portion 33a that has a threaded portion on its inner circumference for connecting the connector base end portion 6a, and a housing base end portion 33c that has a threaded portion on its outer circumference for connecting the tip portion of the second pressing portion 9.

[0148] The wall 33b in this embodiment has a generally cylindrical recess on the proximal end side that forms the first lumen 23g1, and a flat surface on the distal end side that abuts against the plug liner 8. The second lumen 33g2 is formed in a generally cylindrical shape extending longitudinally from the center of the wall 33b, and has an inner diameter that allows an insert such as a guide wire G to be inserted therethrough.

[0149] The housing 33 can be made of the same material as the housing 3 of the first embodiment, and in this embodiment, ABS resin is used.

[0150] The elastic member 35 is provided in the first lumen 33g1 of the housing 33, and includes a hollow, generally cylindrical base end portion 35b (corresponding to the "other end portion" of the present invention), a tip end side bulge 35a (corresponding to the "one end side" of the present invention) that is formed continuously with the tip end side of the base end portion 35b and has an outer diameter larger than the outer diameter of the base end portion 35b, and a protrusion 35b that is formed between the base end portion 35b and the tip end portion The third inner cavity 35g is provided with a third inner cavity 35g that penetrates the bulge portion 35a and communicates with the second inner cavity 33g2, a first protrusion 35c that is located approximately in the center of the tip-side bulge portion 35a of the third inner cavity 35g and protrudes radially inward of the third inner cavity 35g, and a first surface 35e that is approximately truncated cone-shaped and abuts against a first pressing portion 37a (described later) and whose normal extends toward the first protrusion 35c.

[0151] The tip-side bulge portion 35a has an approximately cylindrical shape on the tip side and an approximately truncated cone shape on the base end side to conform to the tip-side lumen shape of the first lumen 33g1, and the base-end side portion 35b has an approximately cylindrical shape extending toward the base end from a position a predetermined distance toward the center from both ends of the tip-side bulge portion 35a.

[0152] The third lumen 35g has an approximately cylindrical shape with approximately the same diameter as the second lumen 33g2 at the distal bulge 35a, except for the first protrusion 35c, but in order to make it easier to insert an insert such as a guide wire G from the proximal end of the occlusion device 32, the diameter expands at the proximal side portion 35b toward the proximal end of the occlusion device 32.

[0153] The first protrusion 35c has an approximately hollow disk shape in cross section, and as described above, is located approximately in the center of the tip-side bulge 35a in the third inner cavity 35g, protrudes radially inward of the third inner cavity 35g, and has an inner diameter smaller than that of the second inner cavity 33g2.

[0154] The elastic member 35 can be made of the same material as the elastic member 5 of the first embodiment, and in this embodiment, silicone rubber is used.

[0155] The first pressing portion 37 in this embodiment has a hollow, approximately cylindrical shape that covers the outer periphery of the base end side portion 35b and is configured to be able to press the tip side bulge portion 35a of the elastic member 35 from the base end side toward the tip end.It is arranged so as to be able to move longitudinally within the base end side inner cavity of the first inner cavity 33g1 and is equipped with a first pressing tip portion 37a that has a surface that follows the approximately truncated cone-shaped first surface 35e of the tip side bulge portion 35a, and a second protrusion 37b that is formed radially outward from the base end side portion 35b and protrudes toward the base end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9.

[0156] In addition, like the second protrusion 7b in the first embodiment, the second protrusion 37b has a contact area that is made as small as possible so that the rotational force of the second pressing portion 9 is not transmitted to the first pressing portion 37 as much as possible, and when viewed in cross section, it has a hollow, approximately cylindrical shape with a short thickness.

[0157] The material for forming the first pressing portion 37 can be the same as that for the first pressing portion 7 in the first embodiment, and in this embodiment, polyacetal (POM) is used.

[0158] When the above-described occlusion device 32 is used to occlude the third lumen 35g, the second pressing portion 9 is rotated so as to move the second pressing portion 9 toward the distal end. By moving the second pressing portion 9 toward the distal end and the first pressing portion 37 toward the distal end, the distal bulge 35a of the elastic member 35 is compressed, and the gap of the first protrusion 35c of the third lumen 35g is closed as shown in FIG.

[0159] Note that Figure 12 is a longitudinal cross-sectional view of the medical connector 30 equipped with the occlusion device 32 after the lumen has been occluded, and shows the state after the guide wire G has been removed. However, even when the guide wire G is inserted, it is clear that the elastic member 35 adheres closely to the guide wire G, resulting in an entirely sealed state.

[0160] On the other hand, when using the occlusion device 32 to open the third lumen 35g, the second pressing portion 9 is rotated so as to move toward the proximal end, which is the opposite of the case of occluding the third lumen 35g. By moving the second pressing portion 9 toward the proximal end and allowing the first pressing portion 37 to move toward the proximal end, the compressed state of the elastic member 25 is released, thereby opening the first protruding portion 25c of the third lumen 25g.

[0161] According to the occlusion device 32 of this embodiment, the occlusion device 32 includes a housing 33 having a first lumen 33g1 and a wall portion 33b formed on the distal side of the first lumen 33g1 and having a second lumen 33g2 formed so that an insert such as a guide wire G can be inserted therethrough, and a proximal side portion 35b and a distal side portion 35b provided in the first lumen 33g1 of the housing 33 and disposed on the distal side of the proximal side portion 35b and having an outer diameter larger than the outer diameter of the proximal side portion 35b. The elastic member 35 has a bulging portion 35a and a third inner cavity 35g that penetrates the base end side portion 35b and the tip side bulging portion 35a and communicates with the second inner cavity 33g2, and a first pressing portion 37 that is arranged on the base end side outer periphery of the tip side bulging portion 35a of the elastic member 35 and can press the base end of the tip side bulging portion 35a toward the tip side, so that the elastic member 35 can be efficiently deformed to seal the third inner cavity 35g.

[0162] Furthermore, according to the occlusion device 32 of this embodiment, the elastic member 35 has a first protrusion 35c that protrudes radially inward from the third inner cavity 35g of the tip-side bulge portion 35a, so that the elastic member 35 can be deformed more efficiently to seal the third inner cavity 35g.

[0163] Furthermore, according to the occlusion device 32 of this embodiment, the tip-side bulge 35a has a first surface 35e whose normal extends toward the first protrusion 35c, so that the elastic member 35 can be deformed more efficiently to seal the third lumen 35g.

[0164] Furthermore, according to the occlusion device 32 of this embodiment, the first pressing portion 37 can press the first surface 35e of the tip-side bulge portion 35a, so that the elastic member 35 can be deformed more efficiently to seal the third lumen 35g.

[0165] Furthermore, according to the blocking device 32 of this embodiment, the second pressing portion 9 is rotatably connected to the base end of the housing 33 and is capable of pressing the base end of the first pressing portion 37, and the first pressing portion 37 has a second protrusion 37b that protrudes toward the base end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9. Therefore, the elastic member 35 can be deformed more efficiently to seal the third lumen 35g without being affected by the rotation of the second pressing portion 9.

[0166] Furthermore, according to the blocking device 32 of this embodiment, the second pressing portion 9 has a fourth inner cavity 9g1 formed so that the base end side portion 35b of the elastic member 35 can be inserted therethrough, and therefore the elastic member 35 can be deformed more efficiently to seal the third inner cavity 35g without being affected by the rotation of the second pressing portion 9.

[0167] Furthermore, according to the medical connector 30 of this embodiment, the medical connector 30 is equipped with a blocking device 32, and the second lumen 33g2 is capable of inserting an insert such as a guide wire, and the elastic member 35 has a base end side portion 35b arranged on the base end side of the housing 33 and a tip end bulge portion 35a arranged on the tip side of the base end side portion 35b, and the first pressing portion 37 is arranged on the base end side outer periphery of the tip end bulge portion 35a of the elastic member 35 and is capable of pressing the base end of the tip end bulge portion 35a in the tip direction, so that the medical connector 30 can be used as a medical connector that efficiently deforms the elastic member 35 to seal the third lumen 35g.

[0168] Fifth Embodiment Next, a fifth embodiment of the present invention will be described. Note that the drawings used in this embodiment are also exaggerated to facilitate understanding, and the dimensions are different from the actual dimensions.

[0169] Hereinafter, a fifth embodiment of the present invention will be described, but parts common to the first embodiment will be given the same reference numerals and description thereof will be omitted.

[0170] The closing device 42 of this embodiment differs from the closing device 12 of the second embodiment in the shapes of the housing, the elastic member, and the first pressing portion.

[0171] FIG. 13 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the fifth embodiment before the lumen is blocked, and FIG. 14 is a longitudinal cross-sectional view of a medical connector equipped with a blocking device of the fifth embodiment after the lumen is blocked.

[0172] As shown in Figures 13 and 14, the medical connector 40 of this embodiment is used in a catheter that is composed of a long, hollow, approximately cylindrical catheter body 4b, a distal tip 4a connected to the distal end of the catheter body 4b, and a medical connector 40 connected to the proximal end of the catheter body 4b.

[0173] As shown in Figures 13 and 14, the medical connector 40 is connected to the base end of the catheter main body 4b, and includes a medical connector distal end 6 connected to the base end of the catheter main body 4b, an occlusion device 42 connected to the base end of the medical connector distal end 6, and a plug ner 8 disposed inside the base end side of the medical connector distal end 6, the base end of which abuts against the tip of the occlusion device 42.

[0174] As shown in Figures 13 and 14, the occlusion device 42 of this embodiment is connected to the base end of the medical connector tip 6, and includes a housing 23, an elastic member 45 arranged inside the base end side of the housing 23, a first pressing portion 37 that can press the elastic member 45 from the base end side toward the tip, and a second pressing portion 9 that is connected to the base end of the housing 23 and can press the first pressing portion 37 toward the tip.

[0175] The elastic member 45 is provided in the first lumen 23g1 of the housing 23, and includes a hollow, substantially cylindrical base end portion 45b (corresponding to the "other end portion" of the present invention) and a distal end bulge portion 45a (corresponding to the "one end portion" of the present invention) that is formed continuously with the distal end side of the base end portion 45b and has an outer diameter larger than that of the base end portion 45b, and a distal end bulge portion 45a that penetrates the base end portion 45b and the distal end bulge portion 45a and communicates with the second lumen 23g2. a third inner cavity 45g having a first protrusion 45c located approximately in the center of the distal bulge 45a of the third inner cavity 45g and protruding radially inward of the third inner cavity 45g; a first surface 45d having a generally truncated cone shape that abuts against the second surface 23d of the housing 23 and whose normal extends toward the first protrusion 45c; and a first surface 45e having a generally truncated cone shape that abuts against the first pressing portion 37a and whose normal extends toward the first protrusion 45c.

[0176] The tip-side bulge 45a has an approximately truncated cone shape on the tip side and an approximately truncated cone shape on the base end side to conform to the tip-side lumen shape of the first lumen 23g1 and the shape of the first pressing tip end 37a, and the base end side portion 45b has an approximately cylindrical shape extending toward the base end from a position spaced a predetermined distance toward the center from both ends of the tip-side bulge 45a.

[0177] The third lumen 45g has an approximately cylindrical shape with approximately the same diameter as the second lumen 23g2 at the distal bulge 45a, except for the first protrusion 45c, but in order to make it easier to insert an insert such as a guide wire G from the proximal end of the occlusion device 42, the diameter expands at the proximal side portion 45b toward the proximal end of the occlusion device 42.

[0178] The first protrusion 45c has an approximately hollow disk shape in cross section, and as described above, is located approximately in the center of the tip-side bulge 45a in the third inner cavity 45g, protrudes radially inward of the third inner cavity 45g, and has an inner diameter smaller than that of the second inner cavity 23g2.

[0179] The elastic member 45 can be made of the same material as the elastic member 5 of the first embodiment, and in this embodiment, silicone rubber is used.

[0180] When the above-described occlusion device 42 is used to occlude the third lumen 45g, the second pressing portion 9 is rotated so as to move the second pressing portion 9 toward the distal end. By moving the second pressing portion 9 toward the distal end and the first pressing portion 37 toward the distal end, the distal bulge 45a of the elastic member 45 is compressed, and the gap of the first protrusion 45c of the third lumen 45g is closed as shown in FIG.

[0181] Note that Figure 14 is a longitudinal cross-sectional view of the medical connector 40 equipped with the occlusion device 42 after the lumen has been occluded, and shows the state after the guide wire G has been removed. However, even when the guide wire G is inserted, it is clear that the elastic member 35 adheres closely to the guide wire G, resulting in an entirely sealed state.

[0182] On the other hand, when using the occlusion device 42 to open the third lumen 45g, the second pressing portion 9 is rotated so as to move toward the proximal end, which is the opposite of the case of occluding the third lumen 45g. By moving the second pressing portion 9 toward the proximal end and allowing the first pressing portion 37 to move toward the proximal end, the compressed state of the elastic member 45 is released, thereby opening the first protruding portion 45c of the third lumen 45g.

[0183] According to the occlusion device 42 of the present embodiment, the occlusion device 42 includes a housing 23 having a first lumen 23g1 and a wall portion 23b formed on the distal side of the first lumen 23g1 and having a second lumen 23g2 formed so that an insert such as a guide wire G can be inserted therethrough, and a proximal side portion 45b and a distal side portion 45b disposed on the distal side of the proximal side portion 45b and having an outer diameter larger than the outer diameter of the proximal side portion 45b. The elastic member 45 has a bulging portion 45a and a third inner cavity 45g that penetrates the base end side portion 45b and the tip side bulging portion 45a and communicates with the second inner cavity 23g2, and a first pressing portion 37 that is arranged on the base end side outer periphery of the tip side bulging portion 45a of the elastic member 45 and can press the base end of the tip side bulging portion 45a toward the tip side, so that the elastic member 45 can be efficiently deformed to seal the third inner cavity 45g.

[0184] Furthermore, according to the occlusion device 42 of this embodiment, the elastic member 45 has a first protrusion 45c that protrudes radially inward from the third inner cavity 45g of the tip-side bulge portion 45a, so that the elastic member 45 can be deformed more efficiently to seal the third inner cavity 45g.

[0185] Furthermore, according to the occlusion device 42 of this embodiment, the tip-side bulge portion 45a has first surfaces 45d and 45e whose normals extend toward the first protrusion 45c, so that the elastic member 45 can be deformed more efficiently to seal the third lumen 45g.

[0186] Furthermore, according to the occlusion device 42 of this embodiment, the first pressing portion 37 can press the first surface 45e of the tip-side bulge portion 45a, thereby more efficiently deforming the elastic member 45 and sealing the third lumen 45g.

[0187] Furthermore, according to the blocking device 42 of this embodiment, the second pressing portion 9 is rotatably connected to the base end of the housing 23 and is capable of pressing the base end of the first pressing portion 37, and the first pressing portion 37 has a second protrusion 37b that protrudes toward the base end side of the second pressing portion 9 on the abutment surface with the second pressing portion 9. Therefore, the elastic member 45 can be deformed more efficiently to seal the third inner cavity 45g without being affected by the rotation of the second pressing portion 9.

[0188] Furthermore, according to the blocking device 42 of this embodiment, the second pressing portion 9 has a fourth inner cavity 9g1 formed so that the base end side portion 45b of the elastic member 45 can be inserted therethrough, and therefore the elastic member 45 can be deformed more efficiently to seal the third inner cavity 45g without being affected by the rotation of the second pressing portion 9.

[0189] Furthermore, according to the medical connector 40 of this embodiment, the medical connector 40 is equipped with an occlusion device 42, the second inner cavity 23g2 is capable of inserting an insert such as a guide wire, the base end side portion 45b of the elastic member 45 is arranged on the base end side of the housing 23, the tip side bulge portion 45a is arranged on the tip side of the base end side portion 45b, and the first pressing portion 37 is arranged on the base end side outer periphery of the tip side bulge portion 45a of the elastic member 45 and can press the base end of the tip side bulge portion 45a in the tip direction, so that the medical connector 40 can be used as a medical connector that efficiently deforms the elastic member 45 to seal the third inner cavity 45g.

[0190] The above describes various embodiments of the closure device of the present invention and a medical connector equipped with the closure device, but the present invention is not limited to the above embodiments and can be implemented with various modifications within the scope of the gist of the present invention.

[0191] For example, in the above-described embodiment, the cross-sectional shape of the occlusion device and the medical connector equipped with the occlusion device is described as being approximately circular, but the cross-sectional shape of the occlusion device and the medical connector equipped with the occlusion device is not limited to being approximately circular, and may be any shape, such as rectangular, elliptical, polygonal, etc.

[0192] Furthermore, if the cross-sectional shape of the blocking device and the medical connector equipped with the blocking device is made to be a shape other than approximately circular, the cross-sectional shapes of the housing, elastic member, first pressing portion, and second pressing portion that constitute the blocking device will also be deformed accordingly.

[0193] However, if the cross-sectional shape of the closure device and the medical connector equipped with the closure device is made substantially circular, the third lumen can be more efficiently occluded.

[0194] Furthermore, in the above-described embodiment, a configuration has been described in which the second pressing portion 9 having a screw mechanism is used to press the first pressing portion toward the tip, but the second pressing portion 9 is not limited to one having a screw mechanism, and may also be a self-retaining type (alternate type) push button.

[0195] However, when the second pressing portion 9 having a screw mechanism is used, the amount of pressure applied by the first pressing portion can be finely adjusted, and ultimately, the degree of occlusion of the third lumen can be finely adjusted.

[0196] It is also possible to directly press the first pressing portion without using the second pressing portion 9 .

[0197] However, as mentioned above, using the second pressing part 9 having a screw mechanism allows for fine adjustment of the amount of pressure applied by the first pressing part, and ultimately allows for fine adjustment of the degree of occlusion of the third lumen.

[0198] Furthermore, in the above-described embodiment, a configuration was described in which the first pressing portion has a second protruding portion of a short, hollow, approximately cylindrical shape on the abutment surface with the second pressing portion, protruding toward the base end side of the second pressing portion. However, the cross-sectional shape of the second pressing portion is not limited to a hollow cylindrical shape, and may be any shape as long as it is hollow.

[0199] Furthermore, in the above-described embodiment, a configuration was described in which the first pressing portion has a second protrusion that protrudes toward the base end side of the second pressing portion on the contact surface with the second pressing portion, but the first pressing portion may be configured not to have a second protrusion.

[0200] However, if the second pressing portion is provided and its cross section is formed into a hollow cylindrical shape, the transmission of the rotational force of the second pressing portion can be suppressed in a balanced manner.

[0201] DESCRIPTION OF SYMBOLS 1, 10, 20, 30, 40... Medical connector 2, 12, 22, 32, 42... Occlusion device 3, 23, 33... Housing 3b, 23b, 33b... Wall portion 3g1, 23g1, 33g1... First lumen 3g2, 23g2, 33g2... Second lumen 4a... Distal tip 4b... Catheter body 5, 15, 25, 35, 45... Elastic member 5a, 15a, 25a, 35a, 45a... Distal bulging portion (one end bulging portion) 5b, 15b, 25b, 35b, 45b... Base end side portion (other end side portion) 5g, 15g, 25g, 35g, 45g... Third lumen 7, 27, 37... First pressing portion 7a, 27a, 37a... First pressing tip portion 7b, 27b, 37b... Second protrusion portion 8... Plug inner 9... Second pressing portion 9g1... Fourth lumen 15c, 25c, 35c, 45c... First discharge portion 23d... Second surface 25d, 35e, 45d, 45e... First surface 100... Catheter G... Guidewire

Claims

1. A closure device comprising: a housing having a first lumen and a wall portion formed on one end side of the first lumen and having a second lumen formed to allow an insert to be inserted; an elastic member provided in the first lumen of the housing, the elastic member having an other end side portion, a one-end bulge portion disposed on the one end side of the other end side portion and having an outer diameter larger than the outer diameter of the other end side portion, and a third lumen passing through the other end side portion and the one-end bulge portion and communicating with the second lumen; and a first pressing portion disposed on the outer periphery of the other end side of the one-end bulge portion of the elastic member and capable of pressing the other end of the one-end bulge toward the one end.

2. The occlusion device according to claim 1, characterized in that the elastic member has a first protrusion in the third inner cavity of the one-end bulge portion that protrudes radially inward of the third inner cavity.

3. The closure device according to claim 2, wherein said one end bulge has a first surface whose normal extends toward said first protrusion.

4. The closure device according to claim 3, wherein the first pressing portion is capable of pressing the first surface of the one-end bulge portion.

5. The closure device of claim 2, wherein said wall portion has a second surface having a normal extending toward said first projection.

6. A closure device according to claim 3, characterized in that the wall portion has a second surface that is positioned closer to the one end than the first surface and whose normal extends toward the first protrusion.

7. A closure device according to claim 4, characterized in that the wall portion has a second surface that is positioned closer to the one end than the first surface and whose normal extends toward the first protrusion.

8. A blocking device as described in claim 1, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protruding part that protrudes towards the other end of the second pressing part on the abutment surface with the second pressing part.

9. A blocking device as described in claim 2, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protruding part that protrudes towards the other end of the second pressing part on the abutment surface with the second pressing part.

10. A blocking device as described in claim 3, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protruding part that protrudes toward the other end of the second pressing part on the abutment surface with the second pressing part.

11. A blocking device as described in claim 4, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protrusion that protrudes toward the other end of the second pressing part on its contact surface with the second pressing part.

12. A blocking device as described in claim 5, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protruding part that protrudes towards the other end of the second pressing part on the abutment surface with the second pressing part.

13. A blocking device as described in claim 6, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protruding part that protrudes toward the other end of the second pressing part on the abutment surface with the second pressing part.

14. A blocking device as described in claim 7, characterized in that it is provided with a second pressing part that is rotatably connected to the other end of the housing and is capable of pressing the other end of the first pressing part, and the first pressing part has a second protruding part that protrudes toward the other end of the second pressing part on the abutment surface with the second pressing part.

15. The occlusion device according to claim 8, wherein the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

16. The occlusion device according to claim 9, wherein the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

17. The occlusion device according to claim 10, wherein the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

18. The occlusion device according to claim 11, wherein the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

19. The occlusion device according to claim 12, wherein the second pressing portion has a fourth inner cavity formed so that the other end side portion of the elastic member can be inserted therethrough.

20. A medical connector comprising the closure device of any one of claims 1 to 19, wherein the second inner cavity is capable of inserting another medical instrument, wherein the other end side portion of the elastic member is arranged on the base end side of the housing and the one end side bulge portion is arranged on the tip side of the other end side portion, and the first pressing portion is arranged on the base end side outer periphery of the one end side bulge portion of the elastic member and is capable of pressing the base end of the one end side bulge portion in the tip direction.