Medical device connection structure and medical device

Abstract

This medical device connection structure is provided with: a first connector that has a first flow path connection part and a turning part that is capable of turning with respect to the first flow path connection part by receiving a turning operation; and a second connector having a second flow path connection part and a lock part provided on the outer peripheral side of the second flow path connection part, the first flow path connection part having a first screwing part capable of screwing with the inner peripheral surface of the lock part, and the rotating part having a second screwing part capable of screwing with the inner peripheral surface of the lock part, the first flow path connection portion has a restricting portion, and the restricting portion is in contact with the rotating portion by the rotation operation performed with respect to the rotating portion in a quasi-connection state in which the first flow path connection portion and the second flow path connection portion are connected and the first screwing portion and the second screwing portion are screwed with the locking portion, and the restricting portion is in contact with the rotating portion to restrict the rotation of the rotating portion by the rotation operation performed with respect to the rotating portion in a quasi-connection state in which the first flow path connection portion and the second flow path connection portion are connected and the first screwing portion and the second screwing portion are screwed with the locking portion. The first flow path connection portion is provided with a rotation restricting portion that permits rotation of the rotation portion with respect to the first flow path connection portion and restricts movement of the rotation portion in the axial direction toward the connection port side.

Description

Technical Field

[0001] The present disclosure relates to a medical device connection structure and a medical device. Background Art

[0002] There is known a medical device connection structure having: a first connector having a first flow path connection portion and a rotating portion that can rotate about the central axis of the first flow path connection portion with respect to the first flow path connection portion by receiving a rotation operation; and a second connector having a second flow path connection portion and a locking portion provided on the outer peripheral side of the second flow path connection portion. The rotating portion has a fitting portion that can be screwed with the inner peripheral surface of the locking portion in a state where the first flow path connection portion is connected to the second flow path connection portion (for example, refer to Patent Document 1).

[0003] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2005-192782

[0004] In the conventional medical device connection structure as described above, there is room for improvement in order to achieve a structure that makes it difficult for the connection to accidentally come off. Summary of the Invention

[0005] Therefore, an object of the present disclosure is to provide a medical device connection structure and a medical device in which it is difficult for the connection to accidentally come off.

[0006] One aspect of the present disclosure is as follows.

[0007] [1] A medical device connection structure, comprising:

[0008] A first connector having a first flow path connection portion and a rotating portion that can rotate about the central axis of the first flow path connection portion with respect to the first flow path connection portion by receiving a rotation operation; and

[0009] A second connector having a second flow path connection portion and a locking portion provided on the outer peripheral side of the second flow path connection portion, and capable of being connected to the first connector,

[0010] The first flow path connection portion has a first fitting portion that can be screwed with the inner peripheral surface of the locking portion,

[0011] The rotating portion has a second fitting portion that can be screwed with the inner peripheral surface of the locking portion,

[0012] The first flow path connecting portion has a restricting portion. Through the rotation operation performed on the rotating portion in a quasi-connected state where the first flow path connecting portion is connected to the second flow path connecting portion and the first screwing portion and the second screwing portion are screwed with the locking portion, the restricting portion contacts the rotating portion, thereby allowing the rotation of the rotating portion relative to the first flow path connecting portion and restricting the movement of the rotating portion axially toward the connection port side along the central axis of the first flow path connecting portion.

[0013] [2] The medical device connection structure according to [1], wherein,

[0014] The rotating portion can move axially toward the connection port side relative to the first flow path connecting portion and can also move toward the opposite side of the connection port side, that is, the non-connection port side.

[0015] The first flow path connecting portion has a non-connection port side restricting portion. Through the movement of the rotating portion relative to the first flow path connecting portion toward the non-connection port side, when the rotating portion is in a state where it can be screwed, the non-connection port side restricting portion contacts the rotating portion, thereby restricting the rotation of the rotating portion relative to the first flow path connecting portion and the movement toward the non-connection port side.

[0016] [3] The medical device connection structure according to [2], wherein,

[0017] The rotating portion has at least one concave portion.

[0018] The non-connection port side restricting portion is constituted by a protrusion. Through the movement of the rotating portion relative to the first flow path connecting portion toward the non-connection port side, when the rotating portion is in a state where it can be screwed, the protrusion contacts the at least one concave portion, thereby restricting the rotation of the rotating portion relative to the first flow path connecting portion and the movement toward the non-connection port side.

[0019] [4] The medical device connection structure according to any one of [1] to [3], wherein,

[0020] The first flow path connecting portion has a protruding portion that protrudes radially outward from the central axis.

[0021] The non-connection port side surface of the protruding portion constitutes the restricting portion.

[0022] [5] The medical device connection structure according to [4], wherein,

[0023] The outer peripheral surface of the protruding portion has the first screwing portion.

[0024] [6] The medical device connection structure according to [4] or [5], wherein,

[0025] The protruding portion is in the shape of a flange.

[0026] [7] The medical device connection structure according to any one of [1] to [6], wherein,

[0027] The rotating portion is in a ring shape,

[0028] The outer peripheral surface of the rotating portion has the second screwing portion.

[0029] [8] The medical device connection structure according to any one of [1] to [7], wherein,

[0030] The rotating portion has a rotation operation portion that protrudes radially outward from the second screwing portion and can receive the rotation operation.

[0031] [9] The medical device connection structure according to any one of [1] to [8], wherein,

[0032] The first screwing portion is constituted by a first external thread portion, and the second screwing portion is constituted by a second external thread portion.

[0033]

[10] The medical device connection structure according to [9], wherein,

[0034] The first external thread portion and the second external thread portion have the same pitch.

[0035]

[11] The medical device connection structure according to any one of [1] to

[10] , wherein,

[0036] The first flow path connection portion is configured as a female Luer portion,

[0037] The second flow path connection portion is configured as a male Luer portion.

[0038]

[12] The medical device connection structure according to any one of [1] to

[11] , wherein,

[0039] There is a medical device having the first connector and at least one other connector, and the at least one other connector has a connection port communicating with the connection port of the first flow path connection portion of the first connector.

[0040]

[13] A medical device having a first connector and the first connector being connectable to a second connector, the first connector having: a first flow path connection portion, and a rotating portion that can rotate about the central axis of the first flow path connection portion relative to the first flow path connection portion by receiving a rotation operation, the second connector having: a second flow path connection portion, and a locking portion provided on the outer peripheral side of the second flow path connection portion, wherein,

[0041] The first flow path connection part has a first screwed part that can be screwed with the inner peripheral surface of the locking part.

[0042] The rotating part has a second screwed part that can be screwed with the inner peripheral surface of the locking part.

[0043] The first flow path connection part has a restricting part. In a quasi-connection state where the first flow path connection part is connected to the second flow path connection part and the first screwed part and the second screwed part are screwed with the locking part, when the rotation operation is performed on the rotating part, the restricting part contacts the rotating part, thereby allowing the rotation of the rotating part relative to the first flow path connection part and restricting the movement of the rotating part in the axial direction toward the connection port along the central axis of the first flow path connection part.

[0044] According to the present disclosure, a medical device connection structure and a medical device in which accidental detachment is difficult to occur can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is an external view of a first medical device in a medical device connection structure according to an embodiment.

[0046] Figure 2 is Figure 1 a partially enlarged view.

[0047] Figure 3 is Figure 2 an exploded view of the first connector shown.

[0048] Figure 4 It is a partial cross-sectional external view showing a state at the start of connection of a second connector to a first connector.

[0049] Figure 5 is Figure 4 a partial cross-sectional external view showing a state when changing from the state shown to a quasi-connection state.

[0050] Figure 6 is Figure 5 a partial cross-sectional external view showing a state when a restricting part restricts the rotating part when a rotation operation is performed on the rotating part from the state shown.

[0051] Figure 7 is Figure 6 a cross-sectional view showing a state when further rotation operation is performed from the state shown and the connection is completed. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] Hereinafter, embodiments of the present disclosure will be illustrated in detail with reference to the drawings.

[0053] As Figures 1 to 7 shown, a medical device connection structure 1 according to an embodiment of the present disclosure includes: a first connector 4 (see Figure 1 etc.), which has a first flow path connection portion 2 and a rotation portion 3 that can rotate relative to the first flow path connection portion 2 about the central axis O of the first flow path connection portion 2 by receiving a rotation operation; and a second connector 7 (see Figure 4 etc.), which has a second flow path connection portion 5 and a locking portion 6 provided on the outer peripheral side of the second flow path connection portion 5, and can be connected to the first connector 4.

[0054] The first flow path connection portion 2 has a first screwing portion 8 that can be screwed with the inner peripheral surface of the locking portion 6. The rotation portion 3 has a second screwing portion 9 that can be screwed with the inner peripheral surface of the locking portion 6.

[0055] The first flow path connection portion 2 has a restricting portion 10. By performing a rotation operation on the rotation portion 3 in a quasi-connected state where the first flow path connection portion 2 is connected to the second flow path connection portion 5 and the first screwing portion 8 and the second screwing portion 9 are screwed with the locking portion 6 ( Figure 5 the state shown), as Figure 6 , Figure 7 the hollow arrow in), as Figures 6 to 7 shown, the contact of the restricting portion 10 with the rotation portion 3 allows the rotation of the rotation portion 3 relative to the first flow path connection portion 2 and restricts the movement of the rotation portion 3 in the axial direction toward the connection port side (the side where the connection port 2a is located) along the central axis O of the first flow path connection portion 2.

[0056] According to the above structure, by performing a rotation operation on the rotation portion 3 in the quasi-connected state, a pulling force (see Figure 7 the hollow arrow in) is generated between the first screwing portion 8 and the second screwing portion 9 relative to the locking portion 6 in the axial direction due to the rotation of the rotation portion 3 relative to the first flow path connection portion 2 accompanied by the contact of the restricting portion 10. Thereby, the fitting force generated by screwing can be increased, and thus a stable connection that is difficult to accidentally come off can be achieved.

[0057] As Figure 4 , Figure 6 shown, the rotation portion 3 can move relative to the first flow path connection portion 2 in the axial direction toward the connection port side (see Figure 6 the thick arrow in), or can move toward the non-connection port side, which is the opposite side of the connection port side (see Figure 4 the thick arrow in). The first flow path connection portion 2 has a non-connection port side restricting portion 11, and the non-connection port side restricting portion 11 utilizes the movement of the rotation portion 3 relative to the first flow path connection portion 2 toward the non-connection port side (see Figure 4) When the rotating part 3 is in a state where it can be screwed, that is, when the rotation angle and axial position of the rotating part 3 relative to the first flow path connecting part 2 are in a state where the first screwing part 8 and the second screwing part 9 can be screwed with the inner peripheral surface of the locking part 6, the rotation of the rotating part 3 relative to the first flow path connecting part 2 and the movement toward the non-connection port side are restricted by contact with the rotating part 3. According to such a structure, when screwing the locking part 6 with the second screwing part 9 of the rotating part 3, the necessity of additionally performing an adjustment operation to make the rotating part 3 in a screwing-possible state can be reduced.

[0058] The rotating part 3 has at least one concave part 12 (refer to Figure 3 , Figure 4 ). The number of the concave parts 12 is two, but it can be increased or decreased. The non-connection port side restricting part 11 is constituted by a protrusion 13. When the rotating part 3 moves toward the non-connection port side relative to the first flow path connecting part 2 and the rotating part 3 is in a state where it can be screwed, the protrusion 13 contacts at least one concave part 12, thereby restricting the rotation of the rotating part 3 relative to the first flow path connecting part 2 and the movement toward the non-connection port side. According to such a structure, the non-connection port side restricting part 11 can be realized with a simple structure.

[0059] The first flow path connecting part 2 has a protruding part 14 that protrudes radially outward from the central axis O. The non-connection port side surface of the protruding part 14 constitutes the restricting part 10. According to such a structure, the restricting part 10 can be realized with a simple structure.

[0060] The protruding part 14 is provided at the connection port side end of the first flow path connecting part 2. According to such a structure, the first connector 4 can be realized with a simple structure.

[0061] The outer peripheral surface of the protruding part 14 has the first screwing part 8. According to such a structure, the first flow path connecting part 2 can be realized with a simple structure.

[0062] The protruding part 14 is in a flange shape. According to such a structure, the first flow path connecting part 2 can be realized with a simple structure.

[0063] The rotating part 3 is in a ring shape. The outer peripheral surface of the rotating part 3 has the second screwing part 9. According to such a structure, the rotating part 3 can be realized with a simple structure.

[0064] The rotating part 3 has a rotation operation part 15 that protrudes radially outward from the second screwing part 9 and can receive a rotation operation. According to such a structure, the rotating part 3 can be easily rotated via the rotation operation part 15.

[0065] The rotation operation part 15 is provided at the non-connection port side end of the rotating part 3. According to such a structure, the first connector 4 can be realized with a simple structure.

[0066] The outer peripheral surface of the rotation operation part 15 has a shape in which circumferential concavities and convexities are connected in the circumferential direction over the entire circumference. With such a structure, the operability of the rotation part 3 can be improved.

[0067] The first screwing part 8 is constituted by a first external thread part. With such a structure, the stability of the connection can be improved.

[0068] The second screwing part 9 is constituted by a second external thread part. With such a structure, the stability of the connection can be improved.

[0069] The inner peripheral surface of the locking part 6 has a screwed part 16 that is screwed with the first screwing part 8 and the second screwing part 9. The screwed part 16 is constituted by an internal thread part. With such a structure, the stability of the connection can be improved.

[0070] The first external thread part and the second external thread part are spaced apart from each other by the same distance. With such a structure, the stability of the connection can be improved.

[0071] The first flow path connection part 2 is configured as a female Luer part. The second flow path connection part 5 is configured as a male Luer part. With such a structure, simple connection can be achieved.

[0072] The medical device connection structure 1 has: a medical device (also referred to as the first medical device 17) having a first connector 4; and a medical device (also referred to as the second medical device 18) having a second connector 7. The first medical device 17 has a first connector 4 and at least one other connector 19 having a connection port that communicates with the connection port 2a of the first flow path connection part 2 of the first connector 4 (refer to Figure 1 ). The number of the other connectors 19 is two, but it can be increased or decreased. With such a structure, stable connection of the first connector 4 via at least one other connector 19 and the second connector 7 can be achieved.

[0073] The first medical device 17 can be manufactured, for example, by separately forming the first flow path connection part 2, the rotation part 3, and the other connectors 19 by injection molding or the like, inserting the first flow path connection part 2 into the inner cavity of the rotation part 3 to form the first connector 4, and then joining the end on the non-connection port side of the first connector 4 (the first flow path connection part 2) and the end on the connection port side of the other connector 19.

[0074] The screwing structure between the first connector 4 and the second connector 7 is constituted by a double-thread structure. With such a structure, the stability of the connection can be improved.

[0075] The locking part 6 can rotate relative to the second flow path connection part 5. With such a structure, the stability of the connection can be improved.

[0076] As constituent materials for each of the first flow path connection portion 2, the rotation portion 3, the second flow path connection portion 5, and the locking portion 6, for example, polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymer; ethylene-vinyl acetate copolymer (EVA); polyvinyl chloride; polyvinylidene chloride; polystyrene; polyamide; polyimide; polyamideimide; polycarbonate; poly(4-methylpentene-1); ionomer; acrylic resin; polymethyl methacrylate; acrylonitrile-butadiene-styrene copolymer (ABS resin); acrylonitrile-styrene copolymer (AS resin); butadiene-styrene copolymer; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polycyclohexane terephthalate (PCT); polyether; polyether ketone (PEK); polyether ether ketone (PEEK); polyetherimide; polyoxymethylene (POM); polyphenylene ether; modified polyphenylene ether; polysulfone; polyethersulfone; polyphenylene sulfide; polyarylate; aromatic polyester (liquid crystal polymer); polytetrafluoroethylene, polyvinylidene fluoride, and other fluorine-based resins; and various resin materials. In addition, it may also be a mixture containing one or more of these, a polymer alloy, etc. In addition to this, various glass materials, ceramic materials, and metal materials may also be used.

[0077] The present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

[0078] Therefore, the medical device connection structure 1 of the above-described embodiment has: a first connector 4 having a first flow path connection portion 2 and a rotation portion 3 that can rotate about the central axis O of the first flow path connection portion 2 relative to the first flow path connection portion 2 by receiving a rotation operation; and a second connector 7 having a second flow path connection portion 5 and a locking portion 6 provided on the outer peripheral side of the second flow path connection portion 5 and capable of being connected to the first connector 4. The first flow path connection portion 2 has a first engaging portion 8 that can be screwed with the inner peripheral surface of the locking portion 6, the rotation portion 3 has a second engaging portion 9 that can be screwed with the inner peripheral surface of the locking portion 6, and the first flow path connection portion 2 has a restricting portion 10. By performing a rotation operation on the rotation portion 3 in a quasi-connected state where the first flow path connection portion 2 is connected to the second flow path connection portion 5 and the first engaging portion 8 and the second engaging portion 9 are screwed with the locking portion 6, the restricting portion 10 comes into contact with the rotation portion 3, thereby allowing the rotation portion 3 to rotate relative to the first flow path connection portion 2 and restricting the movement of the rotation portion 3 in the axial direction along the central axis O of the first flow path connection portion 2 toward the connection port side. As long as it is the medical device connection structure 1, various modifications can be made.

[0079] Description of Reference Numerals

[0080] 1...Medical device connection structure; 2...First flow path connection part; 2a...Connection port; 3...Rotating part; 4...First connector; 5...Second flow path connection part; 6...Locking part; 7...Second connector; 8...First screwing part; 9...Second screwing part; 10...Restricting part; 11...Non-connection port side restricting part; 12...Recess; 13...Projection; 14...Protruding part; 15...Rotating operation part; 16...Part to be screwed; 17...First medical device; 18...Second medical device; 19...Other connector; O...Central axis.

Claims

1. A medical device connection structure, characterized in that, comprising: a first connector having a first fluid passage connection portion and a rotating portion that can rotate about the central axis of the first fluid passage connection portion relative to the first fluid passage connection portion by receiving a rotating operation; and a second connector having a second fluid passage connection portion and a locking portion provided on the outer peripheral side of the second fluid passage connection portion, and being connectable to the first connector, the first fluid passage connection portion having a first engaging portion that can be screwed with the inner peripheral surface of the locking portion, the rotating portion having a second engaging portion that can be screwed with the inner peripheral surface of the locking portion, the first fluid passage connection portion having a restricting portion that, by a rotating operation performed on the rotating portion in a quasi-connected state where the first fluid passage connection portion is connected to the second fluid passage connection portion and the first engaging portion and the second engaging portion are screwed with the locking portion, contacts the rotating portion, thereby allowing rotation of the rotating portion relative to the first fluid passage connection portion and restricting movement of the rotating portion in the axial direction along the central axis of the first fluid passage connection portion toward the connection port side.

2. The medical device connection structure according to claim 1, wherein the rotating portion can move relative to the first fluid passage connection portion in the axial direction toward the connection port side and can also move to the opposite side of the connection port side, i.e., the non-connection port side, the first fluid passage connection portion having a non-connection port side restricting portion that, by movement of the rotating portion relative to the first fluid passage connection portion to the non-connection port side, contacts the rotating portion when the rotating portion is in a screwing-engageable state, thereby restricting rotation of the rotating portion relative to the first fluid passage connection portion and movement to the non-connection port side.

3. The medical device connection structure according to claim 2, wherein the rotating portion has at least one recess, the non-connection port side restricting portion is constituted by a protrusion that, by movement of the rotating portion relative to the first fluid passage connection portion to the non-connection port side, contacts the at least one recess when the rotating portion is in a screwing-engageable state, thereby restricting rotation of the rotating portion relative to the first fluid passage connection portion and movement to the non-connection port side.

4. The medical device connection structure according to claim 1, wherein the first fluid passage connection portion has a protruding portion that protrudes radially outward from the central axis, a surface on the non-connection port side of the protruding portion constitutes the restricting portion.

5. The medical device connection structure according to claim 4, wherein the outer peripheral surface of the protruding portion has the first engaging portion.

6. The medical device connection structure according to claim 4, wherein the protruding portion is in the shape of a flange.

7. The medical device connection structure according to claim 1, wherein the rotating portion is in the shape of a ring, the outer peripheral surface of the rotating portion has the second engaging portion.

8. The medical device connection structure according to claim 1, wherein The rotating portion has a rotation operation portion that protrudes radially outward from the second screwed portion and can receive the rotation operation.

9. The medical device connection structure according to claim 1, wherein the first screwed portion is constituted by a first external thread portion, and the second screwed portion is constituted by a second external thread portion.

10. The medical device connection structure according to claim 9, wherein the first external thread portion and the second external thread portion have the same pitch.

11. The medical device connection structure according to claim 1, wherein the first fluid passage connection portion is configured as a female Luer portion, the second fluid passage connection portion is configured as a male Luer portion.

12. The medical device connection structure according to claim 1, wherein there is a medical device having the first connector and at least one other connector, and the at least one other connector has a connection port that communicates with the connection port of the first fluid passage connection portion of the first connector.

13. A medical device having a first connector and the first connector being connectable to a second connector, the first connector having: a first fluid passage connection portion, and a rotating portion that can rotate about the central axis of the first fluid passage connection portion relative to the first fluid passage connection portion by receiving a rotation operation, the second connector having: a second fluid passage connection portion, and a locking portion provided on the outer peripheral side of the second fluid passage connection portion, the medical device being characterized in that the first fluid passage connection portion has a first screwed portion that can be screwed with the inner peripheral surface of the locking portion, the rotating portion has a second screwed portion that can be screwed with the inner peripheral surface of the locking portion, the first fluid passage connection portion has a restricting portion, and by performing the rotation operation on the rotating portion in a quasi-connected state where the first fluid passage connection portion and the second fluid passage connection portion are connected and the first screwed portion and the second screwed portion are screwed with the locking portion, the restricting portion contacts the rotating portion, thereby allowing the rotation of the rotating portion relative to the first fluid passage connection portion and restricting the movement of the rotating portion in the axial direction along the central axis of the first fluid passage connection portion toward the connection port side.

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