Conversion adapters, connector sets and assemblies

Abstract

A conversion adapter according to the present disclosure is provided with: a female threaded part that can be attached to a female connector part in which a male threaded part capable of connecting a luer lock-type first male connector part conforming to ISO80369 is formed, and that can be screwed together with the male threaded part of the female connector part; and a lock part capable of engaging with a second male connector that does not conform to ISO80369.

Description

[Technical Field]

[0001] The present disclosure relates to conversion adapters, connector sets, and assemblies. [Background technology]

[0002] Conventionally, male connector parts for medical use that comply with ISO 80369, an international standard of the International Organization for Standardization, have been known. However, for example, in medical connectors used for specific purposes, male connector parts that do not comply with ISO 80369 may be used.

[0003] Patent Document 1 describes an adapter that can be detachably attached to a mixture injection port. By attaching the adapter described in Patent Document 1 to the mixture injection port, both a locking luer part and a slip luer part can be connected to the mixture injection port. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-192602 Summary of the Invention [Problem to be solved by the invention]

[0005] From the perspective of work efficiency for medical professionals in the medical field, it is desirable to be able to easily convert a female connector part that can be connected to a luer lock type male connector part that complies with ISO 80369 into a female connector part that can be connected in a locked state using a specified locking mechanism to a male connector part that does not comply with ISO 80369.

[0006] The present disclosure aims to provide a conversion adapter that can easily convert a female connector part that can be connected to a luer lock type male connector part that complies with ISO 80369 into a female connector part that can be connected in a locked state using a predetermined locking mechanism to a male connector part that does not comply with ISO 80369, a connector set that includes the conversion adapter, and an assembly that includes the conversion adapter. [Means for solving the problem]

[0007] A conversion adapter according to a first aspect of the present disclosure is attachable to a female connector part having a male thread part that can connect to a first male connector part of a luer lock type that complies with ISO 80369, and is equipped with a female thread part that can be threadedly engaged with the male thread part of the female connector part, and a locking part that can lock a second male connector part that does not comply with ISO 80369.

[0008] A conversion adapter according to one embodiment of the present disclosure comprises a cylindrical adapter body, the female thread portion being formed on the inner surface of the adapter body, and the locking portion being formed on the outer surface of the adapter body.

[0009] In one embodiment of the present disclosure, the adapter body comprises an inner cylindrical body having an inner cylindrical portion on whose inner surface the female thread portion is formed, and an outer cylindrical body having an outer cylindrical portion located radially outward from the inner cylindrical portion and on whose outer surface the locking portion is formed.

[0010] A conversion adapter according to one embodiment of the present disclosure is provided with a rotation control mechanism between the inner and outer cylinders that restricts the outer cylinder from rotating relative to the inner cylinder toward one side in the circumferential direction of the adapter body, and allows the outer cylinder to rotate relative to the inner cylinder toward the other side in the circumferential direction.

[0011] In one embodiment of the present disclosure, the female threaded portion of the adapter body is configured to be able to threadably engage with the male threaded portion of the female connector portion until the tubular portion on which the male threaded portion of the female connector portion is formed passes axially through the adapter body, or until the tip of the tubular portion is flush with the inner edge of one axial end of the adapter body.

[0012] As one embodiment of the present disclosure, the female connector portion comprises the tubular portion that defines an insertion opening into which the first male luer portion of the first male connector portion and the second male luer portion of the second male connector portion can be inserted from the outside, and a valve body that closes the insertion opening.

[0013] In one embodiment of the present disclosure, the locking portion is configured by a recess that can be engaged with a locking claw of the second male connector portion.

[0014] A connector set according to a second aspect of the present disclosure includes the conversion adaptor described above and a medical connector including the female connector portion to which the conversion adaptor can be attached.

[0015] An assembly according to a third aspect of the present disclosure includes the conversion adapter and the female connector portion to which the conversion adapter is attached. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to provide a conversion adapter that can easily convert a female connector part that can be connected to a luer lock type male connector part that complies with ISO 80369 into a female connector part that can be connected in a locked state using a predetermined locking mechanism to a male connector part that does not comply with ISO 80369, a connector set that includes the conversion adapter, and an assembly that includes the conversion adapter. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of an assembly according to one embodiment of the present disclosure. [Figure 2]2 is an exploded perspective view of the assembly shown in FIG. 1, showing a connector set according to one embodiment of the present disclosure. FIG. [Figure 3] FIG. 2 is a top view of the assembly shown in FIG. [Figure 4] 4 is a cross-sectional view of the assembly shown in FIG. 1 taken along line II in FIG. 3. [Figure 5] 2 is a cross-sectional view of the assembly shown in FIG. 1 taken along line II-II in FIG. 3. [Figure 6] 3 is an exploded perspective view of the conversion adaptor shown in FIG. 2 according to the embodiment of the present disclosure. [Figure 7A] 3 is a diagram showing a rotation control mechanism of the conversion adaptor shown in FIG. 2. [Figure 7B] 3 is a diagram showing a rotation control mechanism of the conversion adaptor shown in FIG. 2. [Figure 8] 3 is a cross-sectional view showing a state in which a luer lock-type first male connector portion conforming to ISO80369 of another medical connector is connected to the medical connector shown in FIG. 2. FIG. [Figure 9] 1. FIG. 4 is a cross-sectional view showing a state in which a second male connector portion of another medical connector that does not comply with ISO 80369 is connected to the assembly shown in FIG. [Figure 10A] FIG. 10 is a perspective view of the assembly and the medical connector shown in FIG. 9 in a connected state. [Figure 10B] 3 is a diagram showing a modified example of the medical connector shown in FIG. 2 to which the conversion adapter shown in FIG. 2 can be attached. [Figure 11] 10C is a diagram showing an example of an infusion line including an assembly in which the conversion adaptor shown in FIG. 2 is attached to the medical connector shown in FIG. 10B. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a conversion adaptor, a connector set, and an assembly according to the present disclosure will be described with reference to the accompanying drawings. In each drawing, the same reference numerals are used to designate common components.

[0019] FIG. 1 is a perspective view showing an assembly 100 as one embodiment of an assembly according to the present disclosure. FIG. 2 is an exploded perspective view of the assembly 100 shown in FIG. 1. In other words, FIG. 2 is a view showing a connector set 200. As shown in FIGS. 1 and 2, the assembly 100 includes a conversion adaptor 1 as one embodiment of a conversion adaptor according to the present disclosure, and a medical connector 2. As shown in FIG. 2, the medical connector 2 includes a female connector portion 2a that can be connected to a luer-lock male connector portion 300a (see FIG. 8) that complies with ISO 80369. Hereinafter, for the purpose of convenience of explanation, the male connector portion 300a (see FIG. 8) will be referred to as a "first male connector portion 300a" ​​to distinguish it from another male connector portion 400a (see FIG. 9) described below. Furthermore, the above-mentioned "luer-lock male connector portion compliant with ISO 80369" refers to a luer-lock male connector portion that complies with ISO 80369-2 to ISO 80369-7. As shown in Fig. 1, the conversion adapter 1 can be attached to the female connector portion 2a of the medical connector 2. Here, the conversion adapter 1 and the medical connector 2 may be distributed in the state of an assembly 100 in which the conversion adapter 1 is attached to the female connector portion 2a of the medical connector 2, as shown in Fig. 1. Alternatively, the conversion adapter 1 and the medical connector 2 may be distributed together as a connector set 200 in a separate state in which the conversion adapter 1 is not attached to the female connector portion 2a of the medical connector 2, as shown in Fig. 2. Furthermore, the conversion adapter 1 and the medical connector 2 may each be distributed separately.

[0020] As shown in FIGS. 1 and 2, the conversion adapter 1 is attached to a female connector portion 2a that can be connected to a first male connector portion 300a (see FIG. 8) of a luer lock type that complies with ISO 80369. The female connector portion 2a is configured to be connectable to the first male connector portion 300a (see FIG. 8) of a luer lock type that complies with ISO 80369 by screwing when the conversion adapter 1 is not attached. In contrast, the female connector portion 2a is configured to be connectable to a male connector portion 400a (see FIG. 9) that does not comply with ISO 80369 by a predetermined locking mechanism when the conversion adapter 1 is attached. Hereinafter, for the purpose of distinguishing it from the above-mentioned other first male connector portion 300a (see FIG. 8), for convenience of explanation, the male connector portion 400a (see FIG. 9) will be referred to as the "second male connector portion 400a." In other words, the conversion adapter 1 is an adapter that converts a female connector portion 2a that can be connected to a luer lock type first male connector portion 300a (see Figure 8) that complies with ISO80369 into a state that can be connected to a second male connector portion 400a (see Figure 9) that does not comply with ISO80369 using a specified locking mechanism.

[0021] [Medical Connector 2] First, with reference to Figures 1 to 5, an overview of a medical connector 2 including a female connector portion 2a to which a conversion adaptor 1 is attached will be described. Figure 3 is a top view of the assembly 100, as viewed from the top surface 12a side of the elastic valve body 12. Figure 4 is a cross-sectional view of the assembly 100 taken along line II in Figure 3. Figure 5 is a cross-sectional view of the assembly 100 taken along line II-II in Figure 3.

[0022] As shown in FIGS. 1 to 5, the medical connector 2 includes a female connector portion 2a that can be connected to a first male connector portion 300a (see FIG. 8) of a luer lock type that complies with ISO 80369. Specifically, the female connector portion 2a can be connected to the first male connector portion 300a (see FIG. 8) by threaded engagement. The female connector portion 2a includes at least a tubular portion 2a1. An external thread portion 40 is formed on the outer surface of the tubular portion 2a1, and can be threadedly engaged with a female thread portion 302a (see FIG. 8) of the first male connector portion 300a (see FIG. 8) of a luer lock type that complies with ISO 80369. An insertion opening 14 is defined inside the tubular portion 2a1, into which a first male luer portion 301 (see FIG. 8) of the first male connector portion 300a (see FIG. 8) of a luer lock type that complies with ISO 80369 is inserted. Furthermore, when the conversion adapter 1 is attached to the female connector portion 2a, the second male luer portion 401 (see Figure 9) of the second male connector portion 400a (see Figure 9), which does not comply with ISO80369, can be inserted into the insertion opening 14 defined by the tubular portion 2a1.

[0023] 1 to 5, medical connector 2 includes housing 11 and elastic valve body 12 attached to housing 11. Female connector portion 2a of the present embodiment is composed of cap 16, which is part of housing 11 and will be described later, and elastic valve body 12. Details of tubular portion 2a1 of female connector portion 2a of the present embodiment will be described later.

[0024] As shown in Figures 4 and 5, the housing 11 defines a hollow portion 13. The elastic valve body 12 is located in the hollow portion 13. The hollow portion 13 has an insertion opening 14 into which a first male connector portion 300a (see Figure 8) and a second male connector portion 400a (see Figure 9), which will be described later, can be inserted from the outside, and a flow path 15 that communicates with the insertion opening 14. The elastic valve body 12 closes the insertion opening 14 in the hollow portion 13. The "flow path that communicates with the insertion opening" refers not only to a flow path that is directly connected to the insertion opening, but also to a flow path that is connected to the insertion opening via another space. In this embodiment, the flow path 15 is a flow path that is directly connected to the insertion opening 14.

[0025] The housing 11 includes a cap 16 that defines an insertion opening 14 through which the first male connector portion 300a (see Figure 8) and the second male connector portion 400a (see Figure 9) are inserted from the outside, and a holder 17 that defines a flow path 15 and supports the cap 16.

[0026] The cap 16 includes a top cap 18 and a bottom cap 19. The elastic valve body 12 is compressed and sandwiched between the top cap 18 and the bottom cap 19, and its position within the hollow portion 13, more specifically, within the insertion opening 14, is fixed.

[0027] The holder 17 is a member that defines the flow path 15 and supports the top cap 18 and the bottom cap 19. In this embodiment, both the top cap 18 and the bottom cap 19 contact the holder 17 and are directly supported by the holder 17. However, this configuration is not limited to this. The bottom cap 19 may be held by the top cap 18, and only the top cap 18 may contact the holder 17 and be directly supported. Conversely, the top cap 18 may be held by the bottom cap 19, and only the bottom cap 19 may contact the holder 17 and be directly supported.

[0028] Materials for the holder 17, top cap 18, and bottom cap 19 of the housing 11 include, for example, polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymers; ethylene-vinyl acetate copolymers (EVA); polyvinyl chloride; polyvinylidene chloride; polystyrene; polyamide; polyimide; polyamide-imide; polycarbonate; poly-(4-methylpentene-1); ionomers; acrylic resins; polymethyl methacrylate; acrylonitrile-butadiene-styrene copolymers (ABS resins); acrylonitrile-styrene copolymers (AS resins); and butadiene-styrene copolymers. Examples of the resin material include polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polycyclohexane terephthalate (PCT); polyether; polyether ketone (PEK); polyether ether ketone (PEEK); polyetherimide; polyacetal (POM); polyphenylene oxide; modified polyphenylene oxide; polysulfone; polyether sulfone; polyphenylene sulfide; polyarylate; aromatic polyester (liquid crystal polymer); polytetrafluoroethylene, polyvinylidene fluoride, and other fluorine-based resins. Blends and polymer alloys containing one or more of these may also be used. Other examples include various glass materials, ceramic materials, and metal materials.

[0029] The elastic valve body 12 has slits 20 so that it can elastically deform to open and close when the first male connector portion 300a (see FIG. 8) and the second male connector portion 400a (see FIG. 9) are attached to and detached from the medical connector 2. The elastic valve body 12 is also arranged to close the insertion opening 14 defined by the top cap 18 and the bottom cap 19. Specifically, the elastic valve body 12 is clamped by a clamping portion formed by the top cap 18 and the bottom cap 19, and its position within the insertion opening 14 is fixed.

[0030] The elastic valve body 12 is molded and formed to be elastically deformable. Examples of materials for the elastic valve body 12 include various rubber materials such as natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, urethane rubber, silicone rubber, and fluororubber, as well as various thermoplastic elastomers such as styrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber-based, and chlorinated polyethylene-based, and the elastic valve body 12 may be made of one or a mixture of two or more of these materials.

[0031] The female connector portion 2a of the medical connector 2 of this embodiment is composed of the above-mentioned top cap 18, bottom cap 19, and elastic valve body 12 sandwiched between the top cap 18 and bottom cap 19.

[0032] 4 and 5, the top cap 18 includes a substantially cylindrical hollow tube portion 36 and a flange portion 37. The flange portion 37 protrudes outward in the radial direction B from one axial side of the hollow tube portion 36, that is, from the end portion in the insertion direction A1 of the first male connector portion 300a (see FIG. 8) and the second male connector portion 400a (see FIG. 9).

[0033] 4 and 5, a planar upper end surface 38 extending in a direction perpendicular to the insertion direction A1 and the removal direction A2 is provided at the ends in the removal direction A2 of the first male connector portion 300a (see FIG. 8) and the second male connector portion 400a (see FIG. 9), which is the other axial side of the hollow tubular portion 36. This upper end surface 38 includes a substantially circular edge 39 that defines one end in the removal direction A2 of the insertion opening 14 through which the first male connector portion 300a (see FIG. 8) and the second male connector portion 400a (see FIG. 9) are inserted from the outside.

[0034] A male thread portion 40 is formed on the outer peripheral surface of the hollow cylindrical portion 36. The male thread portion 40 is adapted to threadably engage with a female thread portion 302a (see FIG. 8) of a luer lock type first male connector portion 300a (see FIG. 8) conforming to ISO 80369. The flange portion 37 is a portion molded integrally with the hollow cylindrical portion 36. The flange portion 37 engages with a holder 17, which will be described later, thereby holding the top cap 18 in the holder 17.

[0035] 4 and 5, a locking projection 41 that projects in the insertion direction A1 is provided on the inner wall of the hollow tubular portion 36 near the edge 39. The locking projection 41 fits into an annular groove formed on the outer edge of the top surface 12a of the elastic valve body 12, and compresses the elastic valve body 12 together with the locking projection 45 of the bottom cap 19.

[0036] 4 and 5, the bottom cap 19, like the top cap 18, has a substantially cylindrical hollow tube portion 43 and a flange portion 44. The flange portion 44 protrudes outward in the radial direction B from the end of the hollow tube portion 43 in the insertion direction A1. The end of the hollow tube portion 43 in the removal direction A2 fits into an annular groove formed on the outer edge of the bottom surface 12b of the elastic valve body 12 described above, and forms a locking protrusion 45 that compresses and clamps the elastic valve body 12 together with the locking protrusion 41 of the top cap 18.

[0037] The bottom cap 19 is held by the top cap 18 by ultrasonic bonding or the like to the inner surface of the hollow cylinder 36 of the top cap 18 and / or the lower surface (the lower surface in FIGS. 4 and 5) of the flange 37. The lower surface (the lower surface in FIGS. 4 and 5) of the flange 44 of the bottom cap 19 is supported by a holder 17, which will be described later.

[0038] 4 and 5, holder 17 supports top cap 18 and bottom cap 19, and defines flow path 15 therein. In this embodiment, holder 17 supports top cap 18 and bottom cap 19 by directly contacting them, but is not limited to the above-described configuration. In holder 17, the members that come into direct contact with top cap 18 and bottom cap 19 are preferably bonded together by, for example, ultrasonic bonding.

[0039] As shown in FIGS. 4 and 5 , the holder 17 of this embodiment includes a luer-lock first male connector portion conforming to ISO 80369. Specifically, the holder 17 of this embodiment includes a substantially cylindrical tubular portion 46 having a female thread portion 46a formed therein that can be threaded with a male thread portion 40 of a female connector portion 2a of another medical connector or the like, and a male luer portion 47 provided in a hollow portion defined by the tubular portion 46. However, the shape of the holder 17 of the medical connector 2 is not limited to the configuration of this embodiment. The medical connector 2 may also include a holder 517, for example, as shown in FIG. 10B . The holder 517 includes a substantially cylindrical holder main body 517a that defines a hollow portion therein, and cylindrical upstream and downstream port portions 517b and 517c that protrude from the outer peripheral surface of the holder main body 517a. The hollow portion inside the holder main body 517a serves as a part of the flow path extending from the upstream port portion 517b to the downstream port portion 517c.

[0040] As described above, the female connector portion 2a of the medical connector 2 is composed of the cap 16 and the elastic valve body 12. In this embodiment, the tubular portion 2a1 of the female connector portion 2a is composed of the hollow tubular portion 36 of the top cap 18 and the hollow tubular portion 43 of the bottom cap 19. The male thread portion 40 formed on the outer surface of the hollow tubular portion 36 of the top cap 18 can be threadedly engaged with the female thread portion 302a (see FIG. 8) of a luer-lock type first male connector portion 300a (see FIG. 8) conforming to ISO 80369. The first male luer portion 301 (see FIG. 8) of the luer-lock type first male connector portion 300a (see FIG. 8) conforming to ISO 80369 can be inserted from the outside into the insertion openings 14 inside the hollow tubular portion 36 of the top cap 18 and the hollow tubular portion 43 of the bottom cap 19.

[0041] As described above, the medical connector 2 of this embodiment includes the housing 11 and the elastic valve body 12, and the female connector portion 2a is formed by a portion of the housing 11 and the elastic valve body 12, but is not limited to this configuration. The medical connector 2 may be configured to include a female connector portion 2a connectable to a luer lock male connector portion conforming to ISO 80369, such as the first male connector portion 300a (see FIG. 8) shown in this embodiment, and the specific number and shape of the components are not particularly limited. The female connector portion 2a may be, for example, a luer lock female connector portion conforming to ISO 80369.

[0042] [Conversion adapter 1] Next, a conversion adaptor 1 that can be attached to the female connector portion 2a will be described with reference to Figures 1 to 7. Figure 6 is an exploded perspective view of the conversion adaptor 1 shown in Figure 2. Figures 7A and 7B are diagrams showing a rotation control mechanism of the conversion adaptor 1.

[0043] 1 to 5, the conversion adapter 1 can be attached to a female connector portion 2a that can be connected to a first male connector portion 300a (see FIG. 8) of a luer lock type that complies with ISO 80369. Specifically, as shown in FIG. 2 and other figures, the conversion adapter 1 has a female thread portion 50 that can be threadedly engaged with a male thread portion 40 of the female connector portion 2a. The female thread portion 50 is threadedly engaged with the male thread portion 40, thereby connecting the conversion adapter 1 to the female connector portion 2a via a threaded joint.

[0044] The conversion adapter 1 has a female thread portion 50 that can be threaded into the male thread portion 40 of the female connector portion 2a that can be connected to a luer lock type first male connector portion 300a (see Figure 8) that complies with ISO80369, so that the conversion adapter 1 can be easily connected to the female connector portion 2a.

[0045] The conversion adapter 1 also includes a locking portion 51 that can lock a second male connector portion 400a (see FIG. 9) that does not conform to ISO 80369. Although details will be described later, the locking portion 51 of this embodiment is configured with an annular groove 51a as a recess that can engage with a locking claw 402 (see FIG. 9) of the second male connector portion 400a (see FIG. 9).

[0046] Since the conversion adapter 1 itself has a locking portion 51, a second male connector portion 400a (see Figure 9) that does not comply with ISO80369 in a medical device such as a medical connector 2 having a female connector portion 2a can be locked using a predetermined locking mechanism that utilizes the locking portion 51 of the conversion adapter 1, regardless of differences in the shape of parts other than the female connector portion 2a.

[0047] The conversion adaptor 1 of this embodiment will be described in further detail below.

[0048] As shown in Figures 1 and 2, the conversion adapter 1 of this embodiment includes a cylindrical adapter main body 52. ​​As shown in Figures 2, 4 to 6, the female thread portion 50 of the conversion adapter 1 of this embodiment is formed on the inner surface of the adapter main body 52. ​​Furthermore, as shown in Figures 1, 2, and 4 to 6, the locking portion 51 of the conversion adapter 1 of this embodiment is formed on the outer surface of the adapter main body 52. ​​With this configuration, the conversion adapter 1 can have a simple configuration.

[0049] Although the conversion adaptor 1 of the present embodiment is configured only by the cylindrical adaptor main body 52, it is not limited to this configuration. The conversion adaptor 1 may be configured to include other parts in addition to the cylindrical adaptor main body 52.

[0050] Hereinafter, for convenience of explanation, the axial direction of the cylindrical adapter body 52 will be referred to as the "axial direction A of the adapter body 52" or simply as the "axial direction A." The axial direction A of the adapter body 52 is substantially parallel to the insertion direction A1 and removal direction A2 of the female connector portion 2a when the adapter body 52 is connected to the female connector portion 2a. Therefore, hereinafter, one side of the axial direction A will be referred to as the insertion direction A1, and the other side of the axial direction A will be referred to as the removal direction A2. Furthermore, the radial direction of a circle around the central axis O of the adapter body 52 will be referred to as the "radial direction B of the adapter body 52" or simply as the "radial direction B." Furthermore, the circumferential direction around the central axis O of the adapter body 52 will be referred to as the "circumferential direction C of the adapter body 52" or simply as the "circumferential direction C." The central axis O, radial direction B, and circumferential direction C of the adapter body 52 respectively coincide with the central axis, radial direction, and circumferential direction of the cylindrical portion 2a1 of the female connector portion 2a when the conversion adapter 1 is attached to the female connector portion 2a. Therefore, for ease of explanation, in the drawings, the central axis of the tubular portion 2a1 of the female connector portion 2a is also indicated by the symbol "O", the radial direction of the tubular portion 2a1 is also indicated by the symbol "B", and the circumferential direction of the tubular portion 2a1 is also indicated by the symbol "C".

[0051] 6, the adapter main body 52 of this embodiment includes an inner cylindrical body 53 and an outer cylindrical body 54. The inner cylindrical body 53 includes an inner cylindrical portion 53a having a female thread portion 50 formed on its inner surface. The outer cylindrical body 54 includes an outer cylindrical portion 54a located radially outward of the inner cylindrical portion 53a in the radial direction B and having a locking portion 51 formed on its outer surface.

[0052] As shown in Figure 6, the inner tube body 53 of this embodiment includes an inner tube portion 53a having a female thread portion 50 formed on its inner surface as described above, an annular flange portion 53b protruding outward in the radial direction B from the end of the inner tube portion 53a in the removal direction A2, and a plurality of protrusions 53c protruding from the flange portion 53b in the insertion direction A1.

[0053] A support protrusion 53a1 that supports the outer cylinder body 54 from the insertion direction A1 side is provided at an end of the inner cylinder portion 53a in the insertion direction A1. A plurality of support protrusions 53a1 (two in this embodiment) are provided at positions spaced apart in the circumferential direction C, but the number and positions of the support protrusions 53a1 are not particularly limited. The support protrusions 53a1 in this embodiment, together with the flange portion 53b, sandwich the outer cylinder body 54 in the axial direction A, thereby restricting relative movement of the outer cylinder body 54 with respect to the inner cylinder body 53 in the axial direction A. Specifically, the relative movement of the outer cylinder body 54 with respect to the inner cylinder body 53 in the insertion direction A1 is restricted when the flange portion 54b (described later) of the outer cylinder body 54 abuts against the support protrusion 53a1 of the inner cylinder portion 53a of the inner cylinder body 53. Furthermore, the relative movement of the outer cylinder body 54 with respect to the inner cylinder body 53 in the removal direction A2 is restricted by the outer cylinder portion 54a of the outer cylinder body 54 abutting against the flange portion 53b of the inner cylinder body 53. In this manner, the inner cylinder body 53 and the outer cylinder body 54 of this embodiment can be connected to each other so as not to separate from each other in the axial direction A. Therefore, the inner cylinder body 53 and the outer cylinder body 54 are prevented from unintentionally separating from each other, and the operability for a medical professional using the conversion adapter 1 can be improved.

[0054] The multiple protrusions 53c are arranged at predetermined intervals in the circumferential direction C. In this embodiment, four multiple protrusions 53c are arranged at equal intervals in the circumferential direction C. Each protrusion 53c is located outside the inner cylindrical portion 53a in the radial direction B. Furthermore, each protrusion 53c is arranged spaced apart from the outer surface of the inner cylindrical portion 53a outside in the radial direction B.

[0055] Although details will be described later, the protrusion 53c constitutes a part of the rotation control mechanism of this embodiment (see FIGS. 7A and 7B). The inner cylinder 53 of this embodiment has a plurality of protrusions 53c, but the number is not particularly limited. The inner cylinder 53 may have only one protrusion 53c, or a plurality other than four.

[0056] More specifically, in this embodiment, each protrusion 53c is formed by a rod-shaped protrusion that protrudes from the flange 53b in a direction inclined with respect to the insertion direction A1. That is, the rod-shaped protrusion serving as the protrusion 53c in this embodiment protrudes from the flange 53b in a direction inclined with respect to the axial direction A. Therefore, as shown in FIGS. 7A and 7B, a lower surface 53c1, which is the side surface of the protrusion 53c on the insertion direction A1 side, and an upper surface 53c2, which is the side surface of the protrusion 53c on the removal direction A2 side, are formed by inclined surfaces that are inclined with respect to the axial direction A. Also, as shown in FIGS. 7A and 7B, a tip surface 53c3 of the protrusion 53c is formed by a plane that is substantially parallel to the axial direction A.

[0057] Each protrusion 53c can swing by elastically deforming in the axial direction A around a base end connected to the flange portion 53b as a fulcrum. Although details will be described later, the rotation control mechanism of this embodiment restricts or allows relative rotation between the inner cylinder body 53 and the outer cylinder body 54 by causing the protrusions 53c of the inner cylinder body 53 to swing in the axial direction A depending on the engagement relationship with the convex portions 54b1 of the outer cylinder body 54 (see FIGS. 7A and 7B).

[0058] As described above, the outer tube body 54 comprises an outer tube portion 54a having an engaging portion 51 formed on its outer surface, and an annular flange portion 54b protruding inward in the radial direction B from the end of the outer tube portion 54a in the insertion direction A1.

[0059] As described above, the locking portion 51 formed on the outer surface of the outer tubular portion 54a is an annular groove 51a serving as a recess extending over the entire circumferential direction C. However, the locking portion 51 is not limited to the annular groove 51a of this embodiment. The locking portion 51 may be configured, for example, by a plurality of recesses spaced apart in the circumferential direction C. The locking portion 51 can be designed appropriately according to the specific shape of the second male connector portion 400a (see FIG. 9) and is not limited to a recess. However, like the annular groove 51a of this embodiment, the locking portion 51 is preferably a recess that can engage with the locking claw 402 (see FIG. 9) of the second male connector portion 400a (see FIG. 9). This makes it easy to realize the locking portion 51 with a simple configuration.

[0060] Furthermore, a stepped surface 54a1 that supports the flange portion 53b of the inner cylinder body 53 from the insertion direction A1 side is preferably formed on the inner surface of the outer cylinder portion 54a. The outer cylinder portion 54a of this embodiment has different inner diameters in the insertion direction A1 and the removal direction A2. The stepped surface 54a1 of this embodiment is an annular flat surface facing the removal direction A2 that connects the inner surfaces of the outer cylinder portion 54a with the above-mentioned different inner diameters. By providing such a stepped surface 54a1, the inner cylinder body 53 and the outer cylinder body 54 can be connected with the flange portion 53b, which forms the end of the inner cylinder body 53 in the removal direction A2, housed within the outer cylinder portion 54a. In other words, the inner cylinder body 53 and the outer cylinder body 54 can be connected with the outer cylinder body 54 covering the outer side of the inner cylinder body 53 in the radial direction B so that the inner cylinder body 53 cannot be pinched from the outside in the radial direction B. Therefore, in a state where inner cylinder 53 is connected to female connector portion 2a with a screw joint, inner cylinder 53 can be prevented from rotating so as to come off from female connector portion 2a. This will be described in detail later.

[0061] A plurality of protrusions 54b1 are provided on the surface of the flange portion 54b facing the removal direction A2. The plurality of protrusions 54b1 are arranged at predetermined intervals in the circumferential direction C. In this embodiment, twelve protrusions 54b1 are arranged at equal intervals in the circumferential direction C. As will be described in detail later, the protrusions 54b1 constitute a part of the rotation control mechanism of this embodiment (see FIGS. 7A and 7B). The outer cylinder body 54 of this embodiment has a plurality of protrusions 54b1, but the number thereof is not particularly limited. The outer cylinder body 54 may have only one protrusion 54b1, or a plurality other than twelve.

[0062] 6, 7A, and 7B, each of the convex portions 54b1 of this embodiment is provided with a rotation restricting surface 55a on one side in the circumferential direction C, the rotation restricting surface 55a being a flat surface substantially parallel to the axial direction A. Furthermore, each of the convex portions 54b1 of this embodiment is provided with a rotation allowing surface 55b on the other side in the circumferential direction C, the rotation allowing surface 55b being a flat surface inclined with respect to the axial direction A. The convex portion 54b1 of this embodiment is a substantially triangular protrusion having the rotation restricting surface 55a and the rotation allowing surface 55b on both side surfaces, but the shape thereof is not particularly limited as long as rotation control, which will be described later, is possible.

[0063] Next, a rotation control mechanism of the conversion adapter 1 of this embodiment will be described. A rotation control mechanism is provided between the inner cylinder 53 and the outer cylinder 54 of this embodiment. The rotation control mechanism restricts the outer cylinder 54 from rotating relative to the inner cylinder 53 to one side in the circumferential direction C. On the other hand, the rotation control mechanism allows the outer cylinder 54 to rotate relative to the inner cylinder 53 to the other side in the circumferential direction C. By providing such a rotation control mechanism, it is possible to prevent the threaded connection between the female connector portion 2a of the medical connector 2 and the inner cylinder 53 from loosening due to rotation of the outer cylinder 54.

[0064] Specifically, the conversion adapter 1 of this embodiment is threadedly connected to the medical connector 2 by rotating the female thread portion 50 of the inner cylinder 53 in a tightening direction C1, which is one side of the circumferential direction C, relative to the male thread portion 40 of the female connector portion 2a and threading into it. Conversely, when the conversion adapter 1 and the medical connector 2 are threadedly connected together, if the female thread portion 50 of the inner cylinder 53 rotates in a loosening direction C2, which is the other side of the circumferential direction C, relative to the male thread portion 40 of the female connector portion 2a, the threaded connection between the conversion adapter 1 and the medical connector 2 loosens.

[0065] The rotation control mechanism restricts rotation of the outer cylinder body 54 in the fastening direction C1 relative to the inner cylinder body 53. In other words, when the outer cylinder body 54 attempts to rotate in the fastening direction C1 relative to the inner cylinder body 53, the rotation of the outer cylinder body 54 is restricted by the inner cylinder body 53, and the outer cylinder body 54 does not rotate relative to the inner cylinder body 53. Therefore, when connecting the conversion adapter 1 to the female connector portion 2a of the medical connector 2, the outer cylinder body 54 is rotated in the fastening direction C1. As a result, the inner cylinder body 53 and the outer cylinder body 54 rotate together due to the rotation control mechanism, and the female thread portion 50 of the inner cylinder body 53 is threadedly joined to the male thread portion 40 of the female connector portion 2a.

[0066] Furthermore, when the conversion adapter 1 and the medical connector 2 are threadedly connected, the rotation control mechanism allows the outer cylinder 54 to rotate in the loosening direction C2 relative to the inner cylinder 53. That is, when the outer cylinder 54 attempts to rotate in the loosening direction C2 relative to the inner cylinder 53, the outer cylinder 54 is not restricted by the inner cylinder 53 and is able to rotate relatively. Therefore, when the outer cylinder 54 is rotated in the loosening direction C2 while the conversion adapter 1 is connected to the female connector portion 2a of the medical connector 2, the rotation control mechanism causes the outer cylinder 54 to rotate freely relative to the inner cylinder 53. Therefore, even if an unintended external force acts on the exposed outer cylinder 54 while the conversion adapter 1 is connected to the female connector portion 2a of the medical connector 2, the threaded connection between the conversion adapter 1 and the female connector portion 2a of the medical connector 2 is unlikely to loosen. As a result, the conversion adapter 1 can be prevented from unintentionally coming off the female connector portion 2a of the medical connector 2.

[0067] The rotation control mechanism of this embodiment will be described in further detail below. As shown in Figures 7A and 7B, the rotation control mechanism of this embodiment is a ratchet mechanism. The rotation control mechanism of this embodiment is composed of a protrusion 53c of the inner cylinder 53 and a convex portion 54b1 of the outer cylinder 54.

[0068] When the inner cylinder body 53 is connected to the outer cylinder body 54, the tip surface 53c3 of the protrusion 53c of the inner cylinder body 53 and the rotation restriction surface 55a of the convex portion 54b1 of the outer cylinder body 54 are arranged to face each other in the circumferential direction C.

[0069] 7A shows a state in which the outer cylinder body 54 is about to rotate in the tightening direction C1 (leftward in FIGS. 7A and 7B) relative to the inner cylinder body 53. As shown in FIG. 7A, when the outer cylinder body 54 is about to rotate in the tightening direction C1 relative to the inner cylinder body 53, the rotation restricting surface 55a of the convex portion 54b1 abuts against the tip surface 53c3 of the protrusion 53c of the inner cylinder body 53, pressing the inner cylinder body 53 in the tightening direction C1. In other words, by trying to rotate the outer cylinder body 54 in the tightening direction C1 (leftward in FIG. 7A) relative to the inner cylinder body 53, the inner cylinder body 53 and the outer cylinder body 54 can be rotated together.

[0070] In contrast, Figure 7B shows a state in which the outer cylinder body 54 is about to rotate in the loosening direction C2 (rightward in Figures 7A and 7B) relative to the inner cylinder body 53. As shown in Figure 7B, when the outer cylinder body 54 is about to rotate in the loosening direction C2 relative to the inner cylinder body 53, the rotation-restricting surface 55a of the protrusion 54b1 does not abut against the tip surface 53c3 of the protrusion 53c of the inner cylinder body 53. Furthermore, as the lower surface 53c1 slides against the rotation-permitting surface 55b of the protrusion 54b1, the protrusion 53c elastically deforms and swings in the removal direction A2 with the base end connected to the flange portion 53b as a fulcrum (see the arrow in Figure 7B). This allows the protrusion 53c to climb over the protrusion 54b1. That is, even if the outer cylinder body 54 is rotated relative to the inner cylinder body 53 in the loosening direction C2 (rightward in Figures 7A and 7B), the inner cylinder body 53 does not rotate together with the outer cylinder body 54, and the outer cylinder body 54 rotates freely relative to the inner cylinder body 53.

[0071] However, the rotation control mechanism is not limited to the configuration of this embodiment. In this embodiment, the inner cylinder 53 has the protrusion 53c and the outer cylinder 54 has the protrusion 54b1. However, the inner cylinder 53 may have a protrusion having a shape similar to that of the protrusion 54b1, and the outer cylinder 54 may have a protrusion having a shape similar to that of the protrusion 53c. The shapes of the protrusion 53c and the protrusion 54b1 are also not limited to those of this embodiment. Furthermore, a mechanism other than a ratchet mechanism is not required as long as the above-described rotation control can be performed. However, by using a ratchet mechanism as in this embodiment, the above-described rotation control can be easily achieved with a simple configuration.

[0072] 1, 4, and 5, the female thread portion 50 of the adapter main body 52 of this embodiment is configured to be able to threadably engage with the male thread portion 40 of the female connector portion 2a until the tip of the tubular portion 2a1 of the female connector portion 2a becomes flush with the inner edge of the end of the adapter main body 52 on the removal direction A2 side, which is the inner edge of one end of the axial direction A of the adapter main body 52. ​​In other words, in a state where the conversion adapter 1 is connected to the female connector portion 2a (see FIGS. 1, 4, and 5), the upper end surface 38 constituting the tip of the tubular portion 2a1 of the female connector portion 2a of this embodiment is flush with the inner edge of the upper surface 53b1 of the flange portion 53b of the inner tubular body 53, which constitutes the inner edge of the end of the adapter main body 52 on the removal direction A2 side. In this manner, the tip of the tubular portion 2a1 of the female connector portion 2a is exposed from the conversion adapter 1, so that the tip of the tubular portion 2a1 can be easily wiped, thereby improving the wiping ability of the tubular portion 2a1.

[0073] The female thread portion 50 of the adapter body 52 may be configured to be able to threadably engage with the male thread portion 40 of the female connector portion 2a until the tubular portion 2a1 of the female connector portion 2a penetrates the adapter body 52 in the axial direction A. In this manner, the wipeability of the tubular portion 2a1 can be improved, as described above.

[0074] [Connection between the female connector portion 2a and the first male connector portion 300a] FIG. 8 is a cross-sectional view showing a state in which a first male connector portion 300a of a luer lock type conforming to ISO80369 of another medical connector 300 is connected to a female connector portion 2a of a medical connector 2.

[0075] 8, first male connector portion 300a of medical connector 300 includes first male luer portion 301 and a tubular portion 302 that surrounds the radial outside of first male luer portion 301. A female thread portion 302a is formed on the inner surface of tubular portion 302.

[0076] As shown in Fig. 8, the conversion adapter 1 is not connected to the female connector portion 2a of the medical connector 2. As shown in Fig. 8, the first male luer portion 301 of the first male connector portion 300a is inserted from the outside into the insertion opening 14 of the tubular portion 2a1 of the female connector portion 2a. In this state, the male thread portion 40 of the tubular portion 2a1 of the female connector portion 2a is threadedly engaged with the female thread portion 302a of the first male connector portion 300a, thereby connecting the female connector portion 2a and the first male connector portion 300a.

[0077] [Connection between the female connector portion 2a and the second male connector portion 400a] FIG. 9 is a cross-sectional view showing a state in which a conversion adapter 1 is connected to a female connector portion 2a of a medical connector 2, and a second male connector portion 400a of another medical connector 400 that does not comply with ISO80369 is connected.

[0078] As shown in FIG. 9, the second male connector portion (400a) of the medical connector (400) includes a second male luer portion (401) and a locking claw (402) located radially outward of the second male luer portion (401).

[0079] 9, second male luer portion 401 of second male connector portion 400a is inserted from the outside into insertion opening 14 of tubular portion 2a1 of female connector portion 2a. In this state, tip projection 402a of locking claw 402 of second male connector portion 400a fits into annular groove 51a, which is locking portion 51 of conversion adapter 1 connected to female connector portion 2a, thereby connecting female connector portion 2a connected to conversion adapter 1 and second male connector portion 400a.

[0080] In particular, in this embodiment, use of the conversion adapter 1 facilitates the attachment operation of the male connector portion to the female connector portion 2a. Specifically, as shown in FIG. 8, when connecting the first male connector portion 300a to the female connector portion 2a, the first male connector portion 300a is rotated relatively in the circumferential direction of the tubular portion 2a1 of the female connector portion 2a to achieve a screw connection. In contrast, as shown in FIG. 9, when connecting the second male connector portion 400a to the female connector portion 2a, the second male connector portion 400a is brought close to the insertion direction A1 of the female connector portion 2a, and the second male luer portion 401 is inserted into the insertion opening 14. Then, by pushing the second male connector portion 400a in the insertion direction A1, the locking claws 402 of the second male connector portion 400a engage with the annular groove 51a serving as the locking portion 51 of the conversion adapter 1, completing the connection of the female connector portion 2a and the second male connector portion 400a. In other words, by simply moving the second male connector part 400a relative to the female connector part 2a in the insertion direction A1, the female connector part 2a and the second male connector part 400a can be connected in a predetermined locked state by the locking claw 402 and the annular groove 51a.

[0081] Second male connector part 400a shown in Fig. 9 is a so-called "closed type male connector part" that includes cylindrical valve body 403 that can cover second male luer part 401, but the second male connector part that can be connected in a predetermined locked state by using conversion adaptor 1 is not limited to the configuration shown in Fig. 9. In other words, it may be a second male connector part of a different shape that does not comply with ISO80369.

[0082] 10A and 10B are diagrams showing two types of medical connectors 2 equipped with a female connector portion 2a, each having a different holder shape. FIGS. 10A and 10B show a state in which the medical connector 400 shown in FIG. 9 is connected to two types of medical connectors 2. The medical connector 2 shown in FIG. 10A has the same configuration as those shown in FIGS. 1 to 5, 8, and 9. In contrast, the medical connector 2 shown in FIG. 10B includes a holder 517 having a substantially cylindrical holder main body 517a, an upstream port portion 517b, and a downstream port portion 517c.

[0083] As described above, since the conversion adapter 1 itself has the locking portion 51, the second male connector portion 400a that does not comply with ISO80369 can be locked using a predetermined locking mechanism that utilizes the locking portion 51 of the conversion adapter 1, regardless of differences in the shape of parts other than the female connector portion 2a in a medical device such as a medical connector 2 that has a female connector portion 2a (for example, differences in the holder shape in Figures 10A and 10B).

[0084] Finally, an example of an infusion line 600 including the conversion adaptor 1 and the medical connector 2 will be described with reference to FIG.

[0085] The infusion line 600 is configured to include an infusion bag 601 containing a liquid such as a medicinal solution and an indwelling needle 602 inserted into a patient's vein, between which a drip tube 603 and a clamp 604 are connected by a medical tube 605. A medical connector 2 is provided on the infusion line 600, and allows a first male connector portion 300a (see FIG. 8) of a luer lock type conforming to ISO80369 to be connected to the infusion line 600.

[0086] 11 shows a state (assembled state) in which the conversion adapter 1 is attached to the female connector portion 2a (see FIG. 2, etc.) of the medical connector 2. In this embodiment, by attaching the conversion adapter 1 to the female connector portion 2a, a Luer lock type second male connector portion 400a (see FIG. 9) that does not comply with ISO 80369 can be connected to the infusion line 600. Furthermore, while FIG. 11 shows the infusion line 600 including the medical connector 2 shown in FIG. 10B, the infusion line 600 may also include the medical connector 2 shown in FIG. 2, etc.

[0087] The conversion adaptor, connector set, and assembly according to the present disclosure are not limited to the specific configurations shown in the above-described embodiments, and various modifications, changes, and combinations are possible without departing from the scope of the claims. For example, the connector set 200 shown in Fig. 2 may include, in addition to the conversion adaptor 1 and the medical connector 2, another medical device, such as a medical tube 605 shown in Fig. 11. In other words, the connector set 200 may be an infusion set including the conversion adaptor 1 and the medical connector 2.

[0088] Furthermore, in the above-described embodiment, assembly 100 is shown as having a configuration in which conversion adapter 1 is attached to medical connector 2, but assembly 100 is not limited to this configuration. Assembly 100 may be configured to include conversion adapter 1 and female connector portion 2a to which conversion adapter 1 is attached, and the medical device including female connector portion 2a is not limited to medical connector 2. [Industrial Applicability]

[0089] The present disclosure relates to conversion adapters, connector sets, and assemblies. [Explanation of symbols]

[0090] 1: Conversion adapter 2: Medical connectors 2a: Female connector part 2a1:Cylinder part 11: Housing 12: Elastic valve body 12a: Top surface of elastic valve body 12b: Bottom surface of elastic valve body 13:Hollow part 14: Insertion opening 15: Flow path 16: Cap 17: Holder 18: Top cap 19: Bottom cap 20: Slit 36: Hollow cylindrical part of the top cap 37: Flange part of the top cap 38: Top surface of the top cap 39: Edge of the top surface of the top cap 40: Male thread of top cap 41: Top cap locking protrusion 43: Hollow cylindrical part of the bottom cap 44: Flange part of bottom cap 45: Bottom cap locking protrusion 46: Holder cylinder 46a: Female thread of holder 47: Male lure part of the holder 50: Female thread 51: Locking part 51a: Annular groove (recess) 52: Adapter body 53: Inner cylinder 53a: Inner cylinder part 53a1: Support protrusion 53b: flange part 53b1: Upper surface of flange 53c: Protrusion (part of rotation control mechanism) 53c1: Lower surface of protrusion 53c2: Upper surface of protrusion 53c3: Tip surface of protrusion 54: Outer cylinder 54a: Outer cylinder 54a1: Step surface 54b: Flange part 54b1: Convex portion (part of the rotation control mechanism) 55a: Rotation restriction surface 55b: Rotation allowance surface 100: Assembly 200: Connector set 300, 400: Medical connectors 300a: First male connector part 301: 1st male lure part 302:Cylinder part 302a: Female thread 400a: Second male connector part 401: 2nd male lure part 402: Locking claw 402a: Tip protrusion 403: Cylindrical valve body 517: Holder 517a: Holder body 517b: Upstream port 517c: Downstream port 600: Infusion line 601: Infusion bag 602: Indwelling needle 603:Drip tube 604: Clamp 605: Medical tubing A: Axial direction of the adapter body A1: Insertion direction A2: Removal direction B: Radial direction of the adapter body C: Circumferential direction of the adapter body C1: Tightening direction C2: Loosening direction O: Center axis of the adapter body

Claims

1. It is possible to attach it to a female connector part having a male thread part that can be connected to a first male connector part of a luer lock type that complies with ISO 80369-7, a female thread portion that can be threadably engaged with the male thread portion of the female connector portion; a locking portion capable of locking a second male connector portion that does not conform to ISO 80369-7; It has a cylindrical adapter body, The female thread portion is formed on the inner surface of the adapter body, The locking portion is formed on the outer surface of the adapter body, The adapter body includes: an inner cylindrical body having an inner cylindrical portion having the female thread portion formed on the inner surface; an outer cylindrical body having an outer cylindrical portion located radially outward from the inner cylindrical portion and having the locking portion formed on its outer surface.

2. 2. The conversion adapter according to claim 1, wherein a rotation control mechanism is provided between the inner and outer cylindrical bodies, which restricts the outer cylindrical body from rotating relative to the inner cylindrical body toward one side in the circumferential direction of the adapter body, and allows the outer cylindrical body to rotate relative to the inner cylindrical body toward the other side in the circumferential direction.

3. The female thread portion of the adapter body is until the cylindrical portion on which the male thread portion of the female connector portion is formed penetrates the adapter body in the axial direction, or The conversion adapter according to claim 1 or 2, wherein the tip of the tubular portion is configured to be threadably engaged with the male threaded portion of the female connector portion until it becomes flush with the inner edge of one axial end of the adapter body.

4. The female connector portion is the tubular portion defining an insertion opening into which a first male luer portion of the first male connector portion and a second male luer portion of the second male connector portion can be inserted from the outside; The conversion adaptor according to claim 3 , further comprising: a valve body that closes the insertion opening.

5. The conversion adaptor according to claim 1 , wherein the locking portion is configured as a recess that can be engaged with a locking claw of the second male connector portion.

6. A conversion adapter according to any one of claims 1 to 5; a medical connector having the female connector portion to which the conversion adapter can be attached.

7. A conversion adapter according to any one of claims 1 to 5; the female connector portion to which the conversion adapter is attached.

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