Connection device

Abstract

Provided is a connection device capable of preventing two housings from being separated due to a force generated at a ratchet when the housings are screwed. The connection device includes a frame (30) including a first housing (36) and a second housing (37); a connection member (40) configured as a cylinder that internally forms a flow path (L1), provided to the frame (30) so as to be rotatable about an axis, and forming a threaded portion (42) for screwing a syringe (1); a flow path member (80) provided to the connection member (40); and a ratchet (50) including a gear (51) provided to the connection member (40) and having a plurality of teeth (51a) in a circumferential direction, and a pawl (52) provided to the frame (30) and engaged with a restriction surface (51b) of the gear (51) that rotates in a screwing direction of the syringe (1) in a direction intersecting a protruding direction in which a protruding portion (36b) of the first housing (36) protrudes from a first end surface (36a), so as to restrict rotation of the gear (51).

Description

Technical Field

[0001] The present invention relates to a connecting device for fluidly connecting a first device and a second device. Background Technology

[0002] In the past, in order to fluidly connect containers such as vials and devices for supplying or receiving fluid, such as syringes, connecting devices connected to the containers and connecting devices for connecting were used, and techniques were employed to fluidly connect the containers and devices by connecting these connecting devices.

[0003] Regarding such a connecting device for connecting to a device, it is known to have the following configuration: a frame having a flow path inside and a device fixing part provided in the frame for screwing and fixing the device.

[0004] Furthermore, there is a known technique in which the device fixing part is rotatably mounted on the frame, and a ratchet is used to allow rotation of the device fixing part in the direction of removing the device from the device fixing part, while restricting rotation in the direction of screwing the device onto the device fixing part. By allowing rotation in the direction of removing the device from the device fixing part, it is possible to prevent the device from being removed from the device fixing part (see, for example, Patent Document 1).

[0005] Furthermore, there is a known technique that involves combining two housings to form a frame, integrally forming the ratchet gear on the outer periphery of the syringe fixing part, and placing the ratchet pawl on one of the two housings.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: International Publication No. 2018 / 186361 Summary of the Invention

[0009] The problem that the invention will solve

[0010] However, in the above-described configuration that uses a ratchet to limit the rotation of the fixing part, there is a problem. That is, since the contact direction of the gear relative to the pawl when a force is generated on the ratchet in the limiting direction is parallel to the protruding direction of the protrusion formed on the dividing surface of one of the two housings, there is a problem that when the user fixes the device to the fixing part, the force generated in the fixing part will separate the two housings.

[0011] Therefore, in order to prevent the two housings from separating, adhesives are used in the fixing of the two housings in addition to the fixing based on the interlocking of the protrusions and concave parts.

[0012] Therefore, the object of the present invention is to provide a connection device that can prevent the two housings from separating due to the force generated by the ratchet when the device is screwed in.

[0013] Methods for solving problems

[0014] The connecting device of the present invention is a connecting device for fluidly connecting a first device and a second device, comprising: a frame having a first housing and a second housing, the first housing having a first end face forming a protrusion, and the second housing having a second end face forming a recess for fitting the protrusion; a connecting member having a cylindrical shape internally forming a first flow path, the middle portion of which is rotatably supported on the frame, one end being disposed outside the frame, and a threaded portion for screwing the first device being formed on the one end; and a flow path member disposed at the other end of the connecting member and communicating with the first flow path. The device has a second flow path internally fluidly connected to the second device; and a ratchet having a gear and a pawl, the gear being disposed on the circumferential surface of the other end side of the connecting member, having a plurality of teeth in the circumferential direction, the teeth having a limiting surface and a climbing surface, the pawl being disposed on the frame, engaging with the limiting surface of the gear rotating in the engagement direction in a direction intersecting with the protrusion direction of the protrusion protruding from the first end face to limit the rotation of the gear, and climbing onto the climbing surface of the gear rotating in the opposite direction to the engagement direction, thereby allowing the rotation of the gear.

[0015] Invention Effects

[0016] According to the present invention, a connection device is provided that prevents the two housings from separating due to the force generated on the ratchet when the device is screwed in. Attached Figure Description

[0017] Figure 1 This is a perspective view illustrating an infusion connector, syringe, nail adapter, and infusion bag according to one embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view showing the infusion connector and the main parts of the syringe.

[0019] Figure 3 This is a three-dimensional diagram showing the structure of the infusion connector.

[0020] Figure 4 This is a cross-sectional view showing the structure of the infusion connector.

[0021] Figure 5 This is a cross-sectional view showing the structure of the infusion connector.

[0022] Figure 6 This is a three-dimensional view showing the structure of the connecting components of the infusion connector.

[0023] Figure 7 This is a cross-sectional view showing a modified example of the ratchet used in the infusion connector.

[0024] Figure 8 This is a perspective view showing the configuration of a bag adapter, which is a modified example of a second device, connected to the infusion connector.

[0025] Figure 9 This is a front view showing the configuration of a syringe adapter, which is a variation of the present invention.

[0026] Figure 10 This is a side view showing the configuration of the syringe adapter.

[0027] Figure 11 This is a cross-sectional view showing the configuration of the syringe adapter.

[0028] Figure 12 This is a three-dimensional diagram showing the configuration of an infusion kit connected to the infusion connector.

[0029] Figure 13 This is a cross-sectional view showing the infusion connector and the main parts of the infusion kit.

[0030] Figure 14 This is a perspective view showing the configuration of a modified example of the infusion kit.

[0031] Figure 15 This is a perspective view showing the configuration of a modified example of the infusion kit.

[0032] Figure 16 This is a perspective view showing the configuration of a modified example of the infusion kit.

[0033] Figure 17 This is a cross-sectional view showing the infusion connector and the main parts of the infusion kit.

[0034] Figure 18 This is a perspective view showing the structure of the infusion connector and the infusion kit. Detailed Implementation

[0035] use Figures 1 to 6 A connection device according to one embodiment of the present invention will be described.

[0036] Figure 1 This is a perspective view showing the infusion connector 10, syringe 1, nail adapter 25, and infusion bag 20. Figure 2 This is a cross-sectional view showing the main parts of the infusion connector 10 and the syringe 1. Figure 3 This is a three-dimensional view showing the configuration of the infusion connector 10. Figure 4 This is a cross-sectional view showing the configuration of the infusion connector 10. Figure 5 This is a cross-sectional view showing the configuration of the infusion connector 10. Figure 6 This is a perspective view showing the configuration of the connecting component 40 of the infusion connector 10.

[0037] The connecting device includes: a frame formed by combining two housing components; a connecting member rotatably disposed in the frame and having a flow path inside for screwing in a first device; a flow path component disposed in the frame and connected to the connecting member; and a ratchet disposed in the frame to restrict rotation of the connecting member in the same direction as the screwing direction. Furthermore, the connecting device fluidly connects the flow path component to the second device by screwing in the first device through the connecting member and connecting the second device to the frame, thereby forming a flow path connecting the first device and the second device.

[0038] In this embodiment, as a connecting device, such as Figure 1 as well as Figure 2 As shown, an example of the first device, namely the infusion connector 10 screwed onto the syringe 1, will be described as an example. The syringe 1 has an outer barrel 1a and a pusher 1b. A barrel tip 2 and a Luer male connector 2b are provided at the front end of the outer barrel 1a. A threaded portion, such as an internal thread 2a, is formed on the inner surface of the barrel tip 2. The Luer male connector 2b is formed inside the barrel tip 2. The Luer male connector 2b is formed into a cylindrical shape that communicates with the inside of the outer barrel 1a. The syringe 1 is configured such that fluid contained in the outer barrel 1a is discharged from the barrel tip 2 by operating the pusher 1b, or fluid outside the outer barrel 1a can be moved into the outer barrel 1a through the barrel tip 2.

[0039] Additionally, the infusion connector 10 may be configured as a pin adapter 25, an example of a second device, detachably connected to the infusion bag 20. The infusion connector 10, by connecting to the pin adapter 25, forms a flow path connecting the pin adapter 25 to the syringe. Furthermore, the infusion connector 10 and the pin adapter 25 together form a flow path fluidly connecting the infusion bag 20 and the syringe 1. The syringe 1 supplies medication to the infusion bag via the infusion connector 10 and the pin adapter 25.

[0040] like Figures 1 to 6 As shown, the infusion connector 10 includes, for example: a frame 30; a connecting member 40 rotatably supported on the frame 30 and connected to the syringe 1; and a ratchet 50 that restricts the rotation of the connecting member 40 in the same direction as the screwing direction of the syringe 1, i.e., a first direction, and allows rotation in the same direction as another direction, i.e., a second direction.

[0041] Furthermore, here, "syringe 1 connected to connecting member 40" means that, in this embodiment, the syringe tip 2 is screwed into connecting member 40, and the Luer male connector 2b is fitted inside connecting member 40. The Luer male connector 2b is fitted inside connecting member 40 such that the outer surface of the Luer male connector 2b is in surface contact with the inner surface of connecting member 40, and a seal is formed between the outer surface of the Luer male connector 2b and the inner surface of connecting member 40.

[0042] In addition, the infusion connector 10 includes: a locking member 70 for fixing and releasing the frame 30 and the pin adapter 25; a flow path member 80 disposed within the frame 30 and connected to the connecting member 40; a cylindrical head cover 90 movably housed within the frame 30; a needle seal 110 fixed to the head cover 90; a stop sleeve 100 configured to selectively fix the head cover 90 to the frame 30 and to selectively fix the head cover 90 and the pin adapter 25; and a force-applying member 120 for applying force to the head cover 90 in the direction extending from the frame 30.

[0043] like Figure 3 As shown, the frame 30 is constructed by combining the first housing 36 and the second housing 37. The frame 30 is, for example, configured as a cylinder with one end sealed and the other end open. Specifically, the frame 30 includes an end wall portion 31, a main body 32, and a support wall portion 33. Furthermore, the pawl 52 of the ratchet 50 (described later) is integrally formed in the frame 30. A portion of the nail adapter 25 is inserted into the frame 30 through the opening 30a at the other end.

[0044] The end wall portion 31 is configured, for example, as a plate with a portion of its edge formed in an arc shape and the other portion formed in a rectangular shape. The end wall portion 31 forms a hole 31a. In the example of this embodiment, as... Figure 3 As shown, the hole 31a is provided, for example, at a position off-center from the center of the arc in a region where the edge is formed into an arc. Furthermore, the hole 31a being formed off-center from the center of the arc means that the center of the hole 31a is offset from the center of the arc. In other examples, the hole 31a may also be formed at the center of the arc in a region where the edge of the end wall portion 31 is formed into an arc.

[0045] The main body 32 is formed at the edge of the end wall portion 31. The main body 32 is formed as a cylindrical shape in which a portion of the nail adapter 25 is movably disposed. Specifically, the main body 32 has a cylindrical portion 34a that is continuous with the arc-shaped portion of the outer periphery of the end wall portion 31 and a rectangular portion 34b that is continuous with the rectangular portion of the outer periphery of the end wall portion 31.

[0046] Additionally, a hole 35 is formed at the lower end of the cylindrical portion 34a. The hole 35 extends radially through the main body 32. The hole 35 is formed in a shape that is longer along the axis of the frame 30. Two holes 35 are formed.

[0047] Support wall portion 33 Figure 4 as well as Figure 5 As shown, it is formed on the inner surface of the main body 32. The support wall portion 33 rotatably supports the connecting member 40. The support wall portion 33 is, for example, a partition wall that axially separates the main body 32, and has a hole 33a for rotatably arranging the small-diameter portion 40b of the connecting member 40, which will be described later.

[0048] The frame 30 thus constructed is formed by combining the first shell 36 and the second shell 37. Figure 5 As shown, housings 36 and 37 have shapes that separate the frame 30, for example, along a plane passing through the axis of the frame 30 and parallel to the direction in which the cylindrical portion 34a and the rectangular portion 34b of the main body 32 are arranged. Furthermore, housings 36 and 37 have protrusions and recesses that fit together when assembled.

[0049] Specifically, the first housing 36 has a first end face 36a. The first end face 36a is, for example, formed as a plane. The first housing 36 has, for example, a plurality of protrusions 36b. The plurality of protrusions 36b are formed on the first end face 36a. The plurality of protrusions 36b are, for example, formed on the central side of the first end face 36a in the thickness direction of the wall thickness of the first housing 36.

[0050] The second housing 37 has a second end face 37a. The second end face 37a abuts, for example, against a first end face 36a. The second housing 37 has a plurality of recesses 37b. The plurality of recesses 37b are formed in a fitting manner with the plurality of protrusions 36b. The plurality of recesses 37b are formed on the second end face 37a. The plurality of recesses 37b are formed on the central side of the second end face 37a in the thickness direction of the wall thickness of the second housing 37.

[0051] Additionally, on one of the first housing 36 and the second housing 37, for example, the first housing 36, a hole 36c is formed in a portion of the area opposite to the gear 51 of the ratchet 50, which will be described later. The hole 36c extends, for example, from the end of the rectangular portion 34b of the first housing 36 on the side of the cylindrical portion 34a, in a circumferential direction centered on the axis of the cylindrical portion 34a, to a position opposite to the central axis of the gear 51 of the ratchet 50 in the direction in which the protrusion 36b protrudes from the first end face 36a.

[0052] The hole 36c is configured to allow the first housing 36 to be molded into shape using a mold. Specifically, the hole 36c is formed in a groove in which the pawl 52 of the ratchet 50 is not undercut. Specifically, the hole 36c is formed in a shape larger than the pawl 52 in the opposing directions of the first housing 36 and the second housing 37. Here, "the hole 36c is larger than the pawl 52 in the opposing directions of the housings 36 and 37" means that the hole 36c has the size to accommodate the pawl 52 in the opposing directions of the housings 36 and 37. In other words, the hole 36c is formed such that, when viewed along the opposing directions of the housings 36 and 37, the pawl 52 is located inside the hole 36c.

[0053] like Figure 2 as well as Figure 6As shown, the connecting member 40 is formed in a cylindrical shape, integrally forming the gear 51 of the ratchet 50 (described later). The connecting member 40 is configured, for example, as a cylinder having a large-diameter portion 40a and a small-diameter portion 40b. The interior of the connecting member 40 forms a flow path L1. The axial midpoint of the large-diameter portion 40a of the connecting member 40 is disposed in the hole 31a of the end wall portion 31 of the frame 30. One end of the large-diameter portion 40a of the connecting member 40, which is opposite to the small-diameter portion 40b, is disposed outside the frame 30. The other parts of the connecting member 40, namely the small-diameter portion 40b side of the large-diameter portion 40a and the small-diameter portion 40b, are disposed within the frame 30.

[0054] A stop portion 40a1 is formed on the circumferential surface of the large-diameter portion 40a. This stop portion 40a1 is formed to be larger than the diameter of the hole 31a. The stop portion 40a1 prevents the connecting member 40 from being pulled out of the frame 30 through the hole 31a by abutting against the edge of the hole 31a. A threaded portion 42 for screwing into the tip 2 of the syringe 1 is formed at one end 41 of the large-diameter portion 40a. The threaded portion 42 is, for example, an external thread that screws into the internal thread 2a formed on the inner surface of the tip 2. The inner circumferential surface of the large-diameter portion 40a is formed into a female Luer shape that conforms to the male Luer connector 2b of the syringe 1. Here, a female Luer shape that conforms to the male Luer connector 2b means that if the male Luer connector 2b is like Figure 2 As shown, it is inserted into the large diameter portion 40a, and the outer peripheral surface of the Luer male connector 2b is in contact with it.

[0055] The small-diameter portion 40b is disposed within the hole 33a of the support wall portion 33. By disposing the small-diameter portion 40b within the hole 33a, the end face of the large-diameter portion 40a becomes a stop, preventing the connecting member 40 from moving away from the end wall portion 31.

[0056] The ratchet 50 has a gear 51 integrally formed with the connecting member 40 and a pawl 52 integrally formed with one of the first housing 36 and the second housing 37.

[0057] The gear 51 is integrally formed on the circumferential surface of the large-diameter portion 40a on the side of the small-diameter portion 40b of the connecting member 40. The gear 51 has a plurality of teeth 51a in the circumferential direction of the large-diameter portion 40a. The teeth 51a have a limiting surface 51b and a climbing surface 51c.

[0058] The limiting surface 51b is formed, for example, to abut against the plane of the claw 52 in a direction intersecting the direction of the projection of the first end face 36a of the protrusion 36b. In this embodiment, the intersecting direction is an orthogonal or substantially orthogonal direction.

[0059] A claw 52 is formed in the frame 30. The claw 52 extends toward the gear 51 in a direction orthogonal to the axial direction of the frame 30. The claw 52 restricts the rotation of the gear 51 in the first direction by engaging the limiting surface 51b of the gear 51, which rotates in the first direction, in a direction that intersects the protrusion direction of the protrusion 36b relative to the first end face 36a of the first housing 36. In this embodiment, the claw 52 is engaged by the limiting surface 51b in a direction orthogonal to, or substantially orthogonal to, the protrusion direction of the protrusion 36b relative to the first end face 36a.

[0060] A claw 52 is disposed within the hole 36c. Specifically, the claw 52 includes a main body 52a, an abutment portion 52b, and a rib 52c. The claw 52 is configured such that if the force input from the gear 51 applying force in the first direction exceeds a predetermined value, the main body 52a and the rib 52c elastically deform, causing the claw 52 to retract from the gear 51, thus allowing the gear 51 to rotate in the first direction. Here, the predetermined value is a value smaller than the value that would cause damage to the syringe 1 or the infusion connector 10.

[0061] The main body 52a extends from one end 36c1 of the rectangular portion 34b of the hole 36c along the outer periphery of the main body 32 in a direction orthogonal to the axis of the frame 30 and from the rectangular portion 34b toward the cylindrical portion 34a toward the gear 51. The main body 52a extends from one end 36c1 of the hole 36c to near the other end. Here, one end of the claw 52 on the side of the hole 36c1 is designated as the base end 52e, and the other end is designated as the front end. The main body 52a has a gap between itself and the inner surface of the hole 36c. This gap is, for example, a gap that allows the main body 52a to move to a certain extent.

[0062] The outer surface 52a1 of the main body 52a is offset inward from the outer surface 32a of the main body 32. The outer surface 52a1 of the main body 52a is exposed to the outer side of the frame 30 through the hole 36c.

[0063] In this embodiment, the offset of the outer surface 52a1 relative to the outer surface 32a is such that even if the pawl 52 is elastically deformed due to the climbing surface 51c of the gear 51 rotating in the second direction climbing onto the pawl 52, the outer surface 52a1 of the main body 52a will not protrude outwards from the outer surface 32a of the main body 32. In other words, the offset of the outer surface 52a1 relative to the outer surface 32a is such that even if the pawl 52 is elastically deformed due to the climbing surface 51c of the gear 51 rotating in the second direction climbing onto the pawl 52, the outer surface 52a1 of the main body 52a is located at the same position as the outer surface 32a of the main body 32, or the outer surface 52a1 is located inside the frame 30 than the outer surface 32a. Here, the same position of the outer surface 52a1 and the outer surface 32a means the same position as the surface that extends the outer surface 32a to the hole 36c.

[0064] Alternatively, the offset of the outer surface 52a1 relative to the outer surface 32a can also be the amount by which the outer surface 52a1 protrudes outward from the outer surface 32a if the pawl 52 is elastically deformed due to the climbing surface 51c of the gear 51 rotating in the second direction climbing onto the pawl 52.

[0065] Furthermore, the offset of the outer surface 52a1 relative to the outer surface 32a towards the inside of the frame 30 is such that when the user presses the hole 36c of the main body 32 and the area around it with their finger, the abutting part 52b can be brought into contact with the gear 51 by pressing the main body 52a towards the inside of the main body 32 with the finger. By bringing the abutting part 52b into contact with the gear 51, the rotation of the gear 51 in the second direction can be restricted.

[0066] The abutting portion 52b protrudes from the front end of the main body 52a toward the inner side of the main body 32 and abuts against the gear 51. The abutting portion 52b is located closer to the gear 51 than the base end 52e of the main body 52a in the protruding direction from the main body 52a. The abutting portion 52b has rigidity that prevents deformation even when abutting against the gear 51 rotating in the first and second directions. The claw 52 has an abutting surface 52d for abutting against the limiting surface 51b. The abutting surface 52d is, for example, formed as a plane for surface contact with the limiting surface 51b, or a plane that is approximately surface-contacting with it.

[0067] Rib 52c is formed along the main body 52a. Rib 52c is formed on the inner surface of the main body 52a. The inner surface of the main body 52a is the surface on the axial side of the frame 30. Rib 52c extends from the base end 52e of the main body 52a to the abutment portion 52b. The thickness of rib 52c is thinner than the thickness of the main body 52a. Here, the thickness of rib 52c refers to the thickness in a direction orthogonal to both the length direction of rib 52c and the protruding direction in which rib 52c protrudes from the main body 52a. In other words, the thickness of rib 52c refers to the thickness in a direction orthogonal to both the direction from the base end 52e of the main body 52a toward the front end and the protruding direction in which rib 52c protrudes from the main body 52a.

[0068] The thickness of rib 52c and the height at which rib 52c protrudes from the main body 52a are set such that if the pressing force input from the gear 51, which is applied in the first direction, exceeds a predetermined value, the main body 52a and rib 52c can elastically deform and retract to a position where the gear 51 can rotate in the first direction. Here, the predetermined value is a value smaller than the value at which the syringe 1 and the infusion connector 10 would break, and a value larger than the pressing force input from the gear 51 generated when the syringe 1 in normal use is screwed into the connecting member 40.

[0069] The front end face 52c1 of the rib 52c in the protruding direction has a flat surface on the abutting portion 52b side and a curved surface on the base end 52e side. One end of the rib 52c on the abutting portion 52b side is connected to the middle part in the protruding direction of the abutting portion 52b.

[0070] That is, regarding the claw 52, ​​in this embodiment, in order for the main body 52a and the rib 52c to be able to elastically deform and retreat to a position where the gear 51 can rotate in the first direction when the pressing force from the gear 51 which is being forceped in the first direction exceeds a predetermined value, the front end face 52c1 is lowered to form a plane on the abutment portion 52b side, and the base end 52e side of the front end face 52c1 is formed to form a gently continuous curved surface.

[0071] Multiple engaging members 70 are provided, which engage with the nail adapter 25 when the nail adapter 25 is inserted into the frame 30. The engaging members 70 engage with the nail adapter 25, thus securing the nail adapter 25 to the frame 30. Furthermore, the engaging members 70 can be disengaged from the nail adapter 25 by operation. For example, two engaging members 70 are provided.

[0072] Engaging component 70, etc. Figure 3 As shown, it is formed into a shape that is longer in one direction. One end of the engaging member 70 is fixed to the opening side of the frame 30 of the hole 35. The engaging member 70 is integrally formed with the frame 30, for example. An engaging part 71 that engages with the nail adapter 25 is provided at the middle of the length direction of the engaging member 70, and an operating part 72 for user operation is provided at the other end of the engaging member 70.

[0073] The engaging portion 71 engages with the nail adapter 25 when the flow path component 80 of the infusion connector 10 is inserted into the nail adapter 25. The engaging portion 71 is configured such that it can be released from engagement with the nail adapter 25 by operating the operating portion 72.

[0074] The operating unit 72 is located outside the main stem 32. The operating unit 72 can be moved from its previous position toward the inside of the main stem 32 by being operated, specifically by being pressed toward the inside of the main stem 32.

[0075] The flow path component 80 has a flow path L2 internally. The flow path component 80 is, for example, a needle component. The flow path component 80 has openings at both ends communicating with the flow path L2. In this embodiment, the opening at the end of the flow path component 80 on the sealing member 110 side is formed on the side of the flow path component 80. One end of the flow path component 80 is as follows: Figure 4 As shown, it is fixed inside the small-diameter portion 40b of the connecting member 40. The flow path member 80 is connected to the flow path L1 inside the connecting member 40.

[0076] The headgear 90 is housed within the frame 30. The headgear 90 is as follows: Figure 4 As shown, it is formed into a cylindrical shape that can move within the frame 30.

[0077] The stop sleeve 100 is fixed to the outer peripheral surface of the headgear 90. The stop sleeve 100 is configured to selectively restrict the movement of the headgear 90 relative to the frame 30 and to selectively fix the headgear 90 to the nail adapter 25.

[0078] Needle seal 110 Figure 4 As shown, it is located within the stop sleeve 100. The needle seal 110 seals the opening at the front end of the flow path component 80, that is, the end inserted into the nail adapter 25. The needle seal 110 is formed of a resin such as rubber or an elastomer, and is configured to seal the hole formed by the flow path component 80 in a liquid-tight and airtight manner by means of restoring force after the flow path component 80 has moved.

[0079] If the nail adapter 25 is inserted into the frame 30 and the head cover 90 moves toward the end wall 31, the flow path component 80 passes through the needle seal 110.

[0080] Force-applying component 120 Figure 4 As shown, the headgear 90 is housed within the frame 30, and force is applied to the opening side of the frame 30 by the headgear 90. The force-applying component 120 is, for example, a coil spring.

[0081] In the infusion connector 10 configured in this way, the head sleeve 90 and the stop sleeve 100 are integrated into one part and move together with the nail adapter 25 in the frame 30 toward the end wall 31 side when the nail adapter 25 is inserted into the frame 30.

[0082] The headgear 90 and the stop sleeve 100, which are combined into one unit, are secured to the nail adapter 25 as the flow path component 80 moves together with the nail adapter 25 to a position where it is inserted into the nail adapter 25. This securing is achieved, for example, by engaging a locking part, such as an arm component provided on the stop sleeve 100, with a locking part, such as a recess provided on the outer peripheral surface of the nail adapter 25.

[0083] Furthermore, if the headgear 90 and the stop sleeve 100 are fixed to the nail adapter 25 and the flow path component 80 is inserted into the nail adapter 25, and the headgear 90, the stop sleeve 100 and the nail adapter 25 are moved together in the frame 30 towards the opening side of the frame 30, the force-applying component 120 applies force, and the headgear 90, the stop sleeve 100 and the nail adapter 25 move together in the frame 30 towards the opening side of the frame 30.

[0084] The headgear 90 and the stop sleeve 100, which are integrated as a whole, are released from the state where the headgear 90 and the stop sleeve 100 are moved toward the opening side of the frame 30 and the flow path component 80 is pulled out from the nail adapter 25.

[0085] Next, an example of the operation of connecting syringe 1 to infusion connector 10 will be described.

[0086] Users such as Figure 2 As shown, for example, the tip 2 of the syringe 1 is aligned with one end of the large diameter portion 40a of the connecting member 40.

[0087] Next, the user, for example, rotates the syringe 1 to screw the threaded portion 42 of the connecting member 40 into the internal thread 2a of the inner surface of the barrel tip 2. The user rotates until the rotation of the syringe 1 relative to the connecting member 40 is restricted. The threaded portion 42 engages with the threaded portion 2a of the inner surface of the barrel tip 2, thereby inserting the Luer male connector 2b inside the barrel tip 2 into the female Luer on the inner surface of the connecting member 40. The user rotates the syringe 1 until the female Luer and the Luer male connector are fully engaged, in other words, the outer peripheral surface of the Luer male connector 2b makes face contact with the inner peripheral surface of the large diameter portion 40a of the connecting member 40, thereby sealing between these outer peripheral surfaces and the inner peripheral surface and restricting the rotation of the syringe 1 relative to the connecting member 40.

[0088] The force intended to rotate the connecting member 40, input by rotating the syringe 1, is applied in the first direction. Therefore, the limiting surface 51b of the teeth 51a of the gear 51 abuts against the abutting portion 52b of the claw 52. Through the contact of the limiting surface 51b with the abutting portion 52b, the abutting portion 52b and the limiting surface 51b engage in a direction that intersects the protruding direction of the protrusion 36b relative to the first end face 36a of the first housing 36. As a result, rotation of the connecting member 40 in the first direction, the same as the direction of engagement with the syringe 1, is restricted.

[0089] By rotating syringe 1 to its final position, the connection between syringe 1 and infusion connector 10 is completed. Here, "rotating syringe 1 to its final position" means that the rotation of syringe 1 is limited by ratchet 50, and syringe 1 is rotated to a position where it can no longer rotate.

[0090] The ratchet 50 allows for a second rotation in the same direction as the rotation in which the syringe 1 is removed. Therefore, according to the infusion connector 10, even if the syringe 1 is rotated to remove it from the infusion connector 10, the syringe 1 is prevented from being removed by rotating integrally with the connecting part 40.

[0091] However, according to the infusion connector 10, if it is necessary to remove the syringe 1 from the infusion connector 10, the syringe 1 can be removed. Next, an example of the operation of removing the syringe 1 from the infusion connector 10 will be described.

[0092] When the user removes the syringe 1 from the connecting part 40, they press the outer surface 52a1 of the body 52a of the claw 52 with their finger. Here, pressing the outer surface 52a1 with a finger means applying a force sufficient to prevent the claw 52 from moving outwards when rotating the syringe 1 in the second direction to remove it from the infusion connector 10. By pressing the body 52a with a finger, the body 52a is prevented from deflecting outwards toward the frame 30. By preventing the body 52a from deflecting outwards toward the frame 30, the climbing surface 51c is prevented from climbing onto the abutment portion 52b. As a result, the rotation of the gear 51 in the second direction is restricted.

[0093] The user restricts the rotation of gear 51 in the second direction by pressing the main body 52a, causing the syringe 1 to rotate in the second direction, which is the direction from which it is removed from the connecting member 40. Since the rotation of gear 51 in the second direction is restricted, even if the syringe 1 is to be rotated in the direction from which it is removed from the connecting member 40, the connecting member 40 will not rotate along with the syringe 1. The operation of removing the syringe 1 from the connecting member 40 is completed by rotating the syringe 1 until it separates from the connecting member 40.

[0094] In the infusion connector 10 configured in this way, if the gear 51 of the ratchet 50 rotates in a first direction which is the limiting direction, the limiting surface 51b abuts against the pawl 52 in a direction that intersects the protruding direction of the protrusion 36b relative to the first end face 36a of the first housing 36. As a result, the limiting surface 51b and the abutting portion 52b engage, thereby limiting the rotation of the gear 51 in the first direction.

[0095] Therefore, even if the gear 51 rotates in the first direction, the housings 36 and 37 are prevented from shifting along the end faces 36a and 37a by the protrusion 36b abutting against the inner surface of the recess 37b in the direction along the end faces 36a and 37a.

[0096] Furthermore, the limiting surface 51b of the gear 51 abuts against the abutting portion 52b in a direction intersecting the protruding direction of the protrusion 36b relative to the first end face 36a, such that only a portion of the force input from the limiting surface 51b to the abutting portion 52b acts in the direction of releasing the engagement of the protrusion 36b and the recess 37b of the housings 36 and 37. Here, the direction of releasing the engagement of the protrusion 36b and the recess 37b refers to the direction in which the protrusion 36b is pulled out from the recess 37b.

[0097] Therefore, the housings 36 and 37 can be fixed by the interlocking force of the recess 37b and the protrusion 36b, so no adhesive is needed to fix the housings 36 and 37.

[0098] Furthermore, the direction in which the limiting surface 51b of the gear 51 abuts against the abutting portion 52b is approximately orthogonal to the protruding direction of the protrusion 36b relative to the first end face 36a, thereby reducing the force acting in the direction of disengaging the protrusion 36b and the recess 37b. Additionally, the direction in which the limiting surface 51b of the gear 51 abuts against the abutting portion 52b is approximately orthogonal to the protruding direction of the protrusion 36b relative to the first end face 36a, thereby preventing the generation of a force that would disengage the protrusion 36b and the recess 37b.

[0099] Furthermore, the first housing 36 has a hole 36c. Therefore, the first housing 36 can be molded using a mold. That is, although the claw 52 extends in a direction intersecting the disengagement direction of the mold that forms the first housing 36, the configuration of the first housing 36 having a hole 36c and one end of the claw 52 being located at one end of the hole 36c prevents the claw 52 from becoming undercut. Therefore, the first housing 36 can be molded using a mold.

[0100] Furthermore, the claw 52 includes a main body 52a, an abutment portion 52b, and a rib 52c. The rib 52c extends from one end of the main body 52a to the abutment portion 52b. Therefore, the range of the rib 52c can be increased, thereby improving the strength of the claw 52 and increasing the limiting force on the rotation of the gear 51 with a simple configuration.

[0101] Furthermore, by setting the shape of the rib 52c to a desired shape, the ratchet 50 can set the limiting force to a desired limiting force. Therefore, by setting the limiting force based on the ratchet 50 to a limiting force that causes the main body 52a and the rib 52c to elastically deform and the abutment portion 52b to retract from the gear 51 before the force input from the gear 51 to the pawl 52 due to the gear 51 rotating in the first direction reaches the smaller of the force that would break the syringe 1 and the force that would break the infusion connector 10, it is possible to prevent the syringe 1 and the infusion connector 10 from breaking. Here, the breaking of the syringe 1 is, for example, the breaking of the internal thread 2a of the tip 2. The breaking of the infusion connector 10 is, for example, the breaking of the ratchet 50 and the breaking of the thread portion 42.

[0102] Furthermore, by placing the main body 52a inside the hole 36c, the user can press the main body 52a from the outside of the frame 30, causing the abutment part 52b to abut against the top surface 51c of the gear 51, thereby restricting the rotation of the gear 51 in the second direction.

[0103] Therefore, in the event that it is necessary to remove the syringe 1 from the infusion connector 10, the syringe 1 can be removed from the connecting part 40 by pressing the body 52a to restrict the rotation of the gear 51 in the second direction.

[0104] Furthermore, the abutting portion 52b is located on the gear 51 side closer than the base end 52e of the body 52a in the direction of protrusion from the body 52a. Therefore, through the elastic deformation of the body 52a and the rib 52c, the claw 52 can retract from the gear 51.

[0105] Furthermore, the outer surface 52a1 of the main body 52a of the claw 52 is positioned offset inward from the outer surface 32a of the frame 30. Therefore, when the gear 51 rotates in the second direction, even if the climbing surface 51c of the gear 51 climbs onto the abutment portion 52b and causes the claw 52 to elastically deform, the amount by which the claw 52 protrudes outward from the frame 30 can be reduced.

[0106] Thus, the claw 52 elastically deforms, causing its outer surface 52a1 to extend from the outer surface 32a outwards from the frame 30, making it easy for the user to stop the ratchet 50. Here, stopping the ratchet 50 means stopping rotation in the second direction, which is the allowed direction of rotation of the gear 51. Furthermore, when it is not necessary to stop the ratchet 50, the amount of protrusion of the outer surface 52a1 can be reduced, thereby reducing the burden on the user's fingers even when pressing the outer surface 52a1 with their fingers.

[0107] Furthermore, by setting the offset of the outer surface 52a1 of the main body 52a relative to the outer surface 32a of the frame 30 to an amount that prevents the outer surface 52a1 from protruding outward from the outer surface 32a towards the outside of the frame 30 when the climbing surface 51c climbs onto the abutment 52b, it is possible to prevent the user from accidentally contacting the main body 52a. That is, it is possible to prevent the user from accidentally restricting the rotation of the gear 51 in the second direction, and thus it is possible to prevent the syringe 1 from accidentally disengaging from the connecting member 40.

[0108] Furthermore, in the above example, the ratchet 50's pawl 52 is described as having a main body 52a, an abutment portion 52b, and a rib 52c, with the main body 52a formed in a shape extending circumferentially along the frame 30. However, it is not limited to this.

[0109] In other examples, such as Figure 7 As shown, the claw 52 can also be configured to extend in a straight line toward the gear 51. In this configuration, the claw 52 may also be configured without the abutment portion 52b and the rib 52c.

[0110] Furthermore, in the above example, the configuration of the frame 30 having the hole 36c was described as an example, but it is not limited to this. For example, if the claw 52 can be integrally formed with the frame 30 by means of a mold even if the frame 30 does not have the hole 36c, the frame 30 may also be configured without the hole 36c.

[0111] Furthermore, in the above example, as a case study, the configuration of connecting the nail adapter 25 to the infusion connector 10 as a second device was described, but it is not limited to this. In other examples, the second device is as follows: Figure 8 As shown, it can also be a bag adapter 25A.

[0112] Figure 8 This is a three-dimensional diagram showing the configuration of the bag adapter 25A. (Example) Figure 8 As shown, the bag adapter 25A includes a stud portion 125, a first device connection portion 126, and a second device connection portion 127.

[0113] The pin portion 125 is connected to the infusion bag 20 by being inserted into it. A first device connection portion 126 is connected to the infusion connector 10. The first device connection portion 126 has, for example, the same configuration as the portion where the pin adapter 25 is inserted into the frame 30. A second device connection portion 127 is connected to a third device. The third device is a device that supplies fluid to or from the infusion bag 20 via the bag adapter 25A. Alternatively, the third device may be, for example, a component that allows fluid to move, such as a tube.

[0114] The bag adapter 25A is connected to the infusion connector 10 via the first device connection part 126 and to the infusion bag 20 via the pin part 125. The infusion connector 10, the first device connection part 126 and the pin part 125 form a flow path that fluidly connects the syringe 1 and the infusion bag 20.

[0115] Additionally, the bag adapter 25A is connected to the infusion bag 20 via a pin 125 and to a third device via a second device connection 127. The pin 125 and the second device connection 127 form a flow path that fluidly connects the infusion bag 20 and the third device. These flow paths are independent.

[0116] Furthermore, in the above example, the infusion connector 10 was described as an example of a connecting device, but the connecting device is not limited to the infusion connector 10. In other examples, such as Figures 9 to 11 As shown, the connecting device can also be a syringe adapter 130 that connects to the container adapter 25B as a second device. Regarding the syringe adapter 130, configurations having the same functions as the infusion connector 10 are labeled with the same reference numerals as the infusion connector 10, and descriptions are omitted.

[0117] Figure 9 This is a front view showing the configuration of the syringe adapter 130. Figure 10 This is a side view showing the configuration of the syringe adapter 130. Figure 11 This is a cross-sectional view showing the state in which the syringe adapter 130 is connected to the container adapter 25B.

[0118] like Figures 9 to 11 As shown, container adapter 25B is connected to a container such as a vial. Container adapter 25B has two flow paths 26 and 27 internally. One end of flow paths 26 and 27 is sealed by a seal 28. If container adapter 25B is connected to a container, these two flow paths 26 and 27 communicate with the inside of the container.

[0119] The syringe adapter 130 includes, for example: a frame 30A; a connecting member 40 rotatably supported on the frame 30A and screwed onto the tip 2 of the syringe 1; a ratchet 50; a locking member 70 for fixing and releasing the frame 30A and the container adapter 25B; a flow path member 80 disposed within the frame 30A and connected to the connecting member 40; a cylindrical head cap 90 movably housed within the frame 30A; a needle seal 110 fixed to the head cap 90; a stop sleeve 100 configured to selectively fix the head cap 90 to the frame 30A and to selectively fix the head cap 90 and the container adapter 25B; a force-applying member 120 for applying force to the head cap 90 in the direction extending from the frame 30A; an air bag 131; and a gas flow path 132 communicating with the air bag 131 and connected to the container adapter 25B.

[0120] The frame 30A includes an end wall portion 31, a main body 32, a support wall portion 33, and an air bag storage portion 135. The air bag storage portion 135 internally stores the air bag 131. The air bag storage portion 135 is integrally formed, for example, on the side of the rectangular portion 34b opposite to the cylindrical portion 34a.

[0121] The gas flow path 132 includes, for example, a gas needle 133 and a flow path section 134 that fluidly connects the gas needle 133 and the air bag 131.

[0122] If the syringe adapter 130 is connected to the container adapter 25B, the flow path component 80 passes through the seals 110 and 28 and is inserted into the flow path 26, thereby communicating with the flow path 26. The gas needle 133 passes through the seals 110 and 28 and is inserted into the flow path 27 when the syringe adapter 130 is connected to the container adapter 25B, thereby communicating with the flow path 27.

[0123] The syringe adapter 130, together with the container adapter 25B, forms a flow path connecting the container and the syringe 1. Additionally, the syringe adapter 130, together with the container adapter 25B, forms a flow path connecting the container and the air bag 131.

[0124] For example, when the volume of the contents of the syringe adapter 130, such as medicine or the like, is increased by moving the medicine or the like from the syringe 1 to the container, the air in the container moves to the air bag 131 through the flow path 27 and the flow path section 134, thereby maintaining the pressure in the container at a constant level.

[0125] Furthermore, in the above example, the connection between the syringe 1 (as the first device) and the connecting member 40 was described as an example of the infusion connector 10 and the syringe adapter 130, but it is not limited to this. In other examples, it is also possible to... Figure 12 as well as Figure 13 The infusion kit 140 is connected as shown. Figure 12 This is a perspective view showing the configuration of an infusion kit 140 connected to an infusion connector 10. Figure 13 This is a cross-sectional view showing the main parts of the infusion connector 10 and the infusion kit 140.

[0126] Infusion kit 140 Figure 12 as well as Figure 13 As shown, it includes at least a tube 141. In this modified example, the infusion kit 140 includes a tube 141 and a connecting part 142.

[0127] One end 143 of the tube 141 is connected to the connecting member 40. End 143 is as follows: Figure 12 As shown, specifically, it is inserted into and fixed to the large-diameter portion 40a. The end 143 is fixed to the large-diameter portion 40a, for example, by bonding or welding with an adhesive. The pipe 141 may also have an adjustment part 141a for adjusting the amount of fluid flowing through the pipe 141.

[0128] A connecting portion 142 is provided at the other end of the pipe 141. The connecting portion 142 is configured to be connected to a fluidly connected object of the pipe 141. The connecting portion 142 is, for example, a Luer lock.

[0129] Additionally, as a variation of the infusion kit 140, such as Figure 14 As shown, the pipe 141 may also be configured to have one or more flow path sections 144. Figure 14 The diagram shows a configuration where the tube 141 includes a flow path 144. Additionally, the tube 141 may also be equipped with a valve 145 that selects the flow path communicating with the infusion connector 10. The valve 145 is configured to switch between a state where the infusion connector 10 is connected to one of the flow path sections 144 and the infusion connector 10 and the connecting portion 142 are disconnected, and a state where the infusion connector 10 and the flow path section 144 are disconnected and the infusion connector 10 and the connecting portion 142 are connected.

[0130] Alternatively, the flow path 144 branching from pipe 141 may also have a connecting portion 146 at its end, which can be connected to a fluidly connected object of the flow path 144. For example, the connecting portion 146 could be... Figure 14 As shown, it could also be a Luer lock. Or, as... Figure 15 As shown, the connecting part 146 can also be a bottle inserter.

[0131] Furthermore, in the above example, as an example, the configuration of the infusion kit 140 where the tube 141 is inserted into and fixed to the large-diameter portion 40a is described, but it is not limited to this. In other examples, such as Figure 16 as well as Figure 17 As shown, the large-diameter portion 40a can also be fixed inside the end 143. The large-diameter portion 40a is fixed inside the end 143, for example, by bonding or welding with an adhesive or the like.

[0132] Or, such as Figure 18 As shown, the connecting member 40 may also not have a portion disposed outside the frame 30, but rather be formed to be disposed within the frame 30. As an example, the large-diameter portion 40a of the connecting member 40 may have a length that does not extend axially beyond the frame 30. Furthermore, the end 143 of the tube 141 may be fixed within the connecting member 40 within the frame 30, or the connecting member 40 may be disposed and fixed internally.

[0133] Furthermore, the present invention is not limited to the embodiments described above, and various modifications can be made during implementation without departing from its spirit. Additionally, the embodiments can be appropriately combined for implementation, in which case combined effects can be obtained. Moreover, the above embodiments encompass various inventions, and various inventions can be extracted based on combinations selected from multiple disclosed constituent elements. For example, if the problem can be solved and the effect obtained even if several constituent elements are deleted from all the constituent elements shown in the embodiments, the configuration after deleting those constituent elements can be extracted as an invention.

[0134] Explanation of reference numerals in the attached figures

[0135] 1… Syringe, 2… Tip, 10… Infusion connector, 20… Infusion bag, 25… Nail adapter, 25A… Bag adapter, 25B… Container adapter, 26… Flow path, 27… Flow path, 28… Seal, 30… Frame, 30a… Opening, 30A… Frame, 31… End wall, 31a… Hole, 32… Main body, 32a… Outer surface, 33… Support wall, 33a… Hole, 34a… Cylindrical part, 34b… Rectangular part, 35… Hole, 36… First housing, 36a… First end face, 36b… Protrusion, 36c… Hole, 37… Second… Housing, 37a…second end face, 37b…recess, 40…connecting member, 40a…large diameter portion, 40a1…stop portion, 40b…small diameter portion, 41…one end, 42…threaded portion, 50…ratchet, 51…gear, 51a…tooth, 51b…limiting surface, 51c…climbing surface, 52…paw, 52a…body, 52a1…outer surface, 52b…abutment portion, 52c…rib, 52c1…front end face, 52d…abutment surface, 52e…base end, 80…flow path member, 130…syringe adapter, L1…flow path, L2…flow path.

Claims

1. A connecting device fluidly connecting a first device and a second device, characterized in that, The connecting device includes: A frame having a first housing and a second housing, the first housing having a first end face forming a protrusion, and the second housing having a second end face forming a recess for fitting the protrusion; The connecting component is formed as a cylindrical part that forms a first flow path inside, with its axial middle part rotatably supported on the frame, and one end disposed outside the frame, with a threaded portion formed on the one end for the first device to be screwed in. A flow path component, which is disposed at the other end of the connecting component and communicates with the first flow path, and has a second flow path internally fluidly connected to the second device; as well as A ratchet includes a gear and a pawl. The gear is located on the circumferential surface of the other end of the connecting member and has multiple teeth in the circumferential direction. Each tooth has a limiting surface and a climbing surface. The pawl is located on the frame and engages with the limiting surface of the gear rotating in the engagement direction in a direction orthogonal to the protrusion direction of the protrusion protruding from the first end face to limit the rotation of the gear. The pawl allows the gear to climb onto the climbing surface of the gear rotating in the opposite direction to the engagement direction.

2. The connecting device according to claim 1, characterized in that, The frame has a hole in the direction opposite to the first housing and the second housing, and the hole is opposite to the claw. The hole is the size in which the claw is configured in the opposite direction.

3. The connecting device according to claim 2, characterized in that, The hole is configured to be elongated in the circumferential direction of the frame. The claw comprises: a body disposed within the hole and extending from one end of the hole to the other end; an abutment portion disposed at the front end of the body and protruding toward the gear side for abutment by the gear; and a rib disposed inside the frame of the body and extending from one end of the body to the abutment portion.

4. The connecting device according to claim 3, characterized in that, The front end of the abutment portion is located on the gear side closer to the base end of the body than the protruding end of the abutment portion in the protruding direction of the abutment portion.

5. The connecting device according to claim 3, characterized in that, The first outer surface of the main body, which protrudes to the outside of the frame, is positioned offset from the inside of the frame compared to the second outer surface of the frame.

6. The connecting device according to claim 5, characterized in that, The amount of offset of the first outer surface relative to the second outer surface is set such that when the climbing surface climbs onto the abutment, the first outer surface is located at the same position as the second outer surface or is closer to the inside of the frame than the second outer surface.

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