Connector and method for producing connector

Abstract

To provide a connector that is less susceptible to trouble at the time of its connection, and a method for producing the same.SOLUTION: A connector 1 has a wire 40, and a wire holder 50. The wire 40 has one or more asperities on its surface. The asperities of the wire 40 are filled with the constituent resin of the holder 50, whereby the holder 50 holds the wire 40.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a connector and a method for manufacturing the connector, and in particular to a wire fixing structure. [Background technology]

[0002] Catheters are used to deliver nutrients or medicines directly into the body. A stylet connector is used to insert into the catheter to stabilize its shape and facilitate smooth insertion of the catheter into the trachea. The stylet connector is equipped with a stylet wire and a connector for connecting to the connector at the base end of the catheter. A male luer is connected to the connector at the base end of the catheter. After the tip of the catheter reaches the affected area, the stylet connector is removed.

[0003] Patent Document 1 discloses a connector in which a wire is inserted into an inner cavity of a wire holding portion that opens toward the tip of the female connector, and is fixed via an adhesive that is filled in the inner cavity. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-115969 A Summary of the Invention [Problem to be solved by the invention]

[0005] When adhesive is used to fasten wires, there is a risk that the adhesive will spill and adhere to the inside of the connector. If adhesive adheres to the inside of the connector, the tapered surfaces of the connectors will not adhere completely to each other, causing problems such as an inability to properly suck up liquid. A connector with a structure and construction method that prevents problems when connecting the connectors is required.

[0006] An object of the present disclosure is to provide a connector that is less susceptible to problems when connecting the connector, and a method for manufacturing the same. [Means for solving the problem]

[0007] The connector according to the present disclosure includes a wire and a wire retaining portion. The wire has at least one projection and recess on a surface thereof, and the retaining portion retains the wire by filling the projection and recess of the wire with a resin that forms the retaining portion.

[0008] According to the above configuration, the connector has a fixing structure in which the unevenness on the wire surface is filled with the resin that constitutes the holding part, so there is no need to use adhesive to fix the wire, and therefore no problems will occur when connecting the connector due to adhesive adhering to the inside of the connector.

[0009] It is preferable that the connector according to one aspect of the present disclosure further has a flow path extending from the base end to the distal end, and the retaining portion is provided within the flow path.

[0010] According to the above configuration, the wire holder is formed in the flow path, which allows for use in injection or suction. Also, during injection or suction, the possibility of problems occurring such as inability to properly suction liquid or gas due to incomplete adhesion of the tapered surfaces of the connectors or narrowing of the flow path by the adhesive can be reduced.

[0011] In a connector that is one aspect of the present disclosure, the retaining portion is a cylindrical body that extends within the flow path of the connector, in the axial direction of the connector, from near the center of the flow path toward the opening of the flow path, and it is preferable that the wire is retained in the retaining portion so that its central axis coincides with the central axis of the connector.

[0012] According to the above configuration, the central axis of the wire in the holding portion coincides with the central axis of the connector, so that when the wire is connected to the catheter, it is less likely to come into contact with the inner surface of the catheter connector, causing wear or damage to the connector.

[0013] In the connector according to one aspect of the present disclosure, the retaining portion is preferably formed by filling a plurality of projections and recesses of the wire with a resin that forms the retaining portion by thermal welding.

[0014] In this case, the holding portion formed of resin can be melted and the wire can be pressed in, and once the resin cools and hardens, the wire can be fixed naturally, so that a wire fixing structure can be formed without using adhesive.

[0015] A method of manufacturing a connector according to one aspect of the present disclosure includes the steps of heating a wire, pressing one end of the wire into the retaining portion while melting it with the heated wire, and hardening the molten resin of the retaining portion while filling the unevenness of the wire.

[0016] According to the above manufacturing method, a stylet connector can be manufactured without using adhesive by simply pressing the wire into the holding portion, and the unevenness of the wire is filled with the molten resin of the holding portion, thereby having a hardened fixed structure.

[0017] In the method for manufacturing a connector according to one aspect of the present disclosure, the step of heating the wire is preferably performed by induction heating.

[0018] In this case, since the heating is performed by induction heating, the influence of heat on the members during the manufacturing process can be reduced. Effect of the Invention

[0019] According to the connector of the present disclosure, no adhesive is used as a structure for holding the wires, so that there is no risk of adhesive leaking into the connector during the manufacturing process, and there is no risk of the tapered surfaces of the connectors not fitting together properly. [Brief description of the drawings]

[0020] [Figure 1] 1 is an external view of a stylet connector according to an embodiment of the present disclosure connected to a catheter. FIG. [Diagram 2]1A-1C are diagrams illustrating the attachment of a stylet wire of a stylet connector to a catheter according to an embodiment of the present disclosure. [Diagram 3] FIG. 1 is a perspective view of a stylet connector according to an embodiment of the present disclosure. [Figure 4] 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] 4 is a cross-sectional view taken along line BB in FIG. [Figure 6] 3 is an axial cross-sectional view of the stylet connector in FIG. 2. [Figure 7] 7 is an enlarged cross-sectional view of a holding portion in FIG. 6. FIG. [Figure 8] 13A-13D are diagrams illustrating a method of fixing a stylet wire in a stylet connector according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In the following description, specific shapes, materials, directions, values, etc. are examples for facilitating understanding of the present disclosure, and can be appropriately changed according to applications, purposes, specifications, etc. In addition, it is initially assumed that the components of the embodiments and modified examples described below can be selectively combined.

[0022] The connector of the present disclosure will be described in terms of its application to a stylet wire, but it can also be applied to a guide wire. First, the difference between a stylet wire and a guide wire will be described. A guide wire is used to inject a drug such as a contrast agent while it is inserted into a catheter. A stylet wire is inserted to stabilize the shape of a catheter, and is removed after the catheter tip reaches the affected area. As described above, since the stylet wire and the guide wire have different uses, the stylet wire has a larger outer diameter than the guide wire, and the outer surface of the stylet wire is close to the inner surface of the catheter. Therefore, when the stylet wire is removed from the catheter, the frictional force is larger than that of the guide wire, and a stable fixing force is required for the wire and the connector. When fixing using an adhesive, a stable fixing force can be achieved by increasing the adhesion area, but on the other hand, the adhesive is more likely to have a negative effect on the engagement surface and the flow path. The connector of the present disclosure does not require a large amount of adhesive and can achieve a strong fixing force, so it is suitable for application to a stylet wire.

[0023] Figure 1 shows the stylet connector 1 of this embodiment. Figure 1 shows the stylet connector 1 connected to a catheter 60. The stylet connector 1 has a cylindrical male connector portion 10 and a cylindrical female connector portion 20, which are integrally formed. The stylet connector 1 is used together with the catheter 60, and is primarily used to stabilize the shape of a tube 62 connected to the tip of the catheter 60 and to guide the tube 62 to the affected area.

[0024] The catheter 60 has a connector portion 61 and a tube 62 extending from the left end of the connector portion 61. The connector portion 61 is engaged with and connected to the female connector portion 20 of the stylet connector 1. In FIG. 1, a stylet wire 40 of the stylet connector 1, which will be described later, is inserted into the tube 62. The tube 62 is composed of a long, thin pipe made of resin. Since the tube 62 has a small diameter and is soft, the stylet wire 40 fixed to the stylet connector 1 is inserted into the tube 62 and guided to the affected area. A tip portion 63 is formed at the tip of the tube 62. A cap 64 is attached to the connector portion 61, and the tip of the connector portion 61 can be blocked if necessary.

[0025] 2 is a diagram showing how the stylet connector 1 is connected to the catheter 60. The stylet wire 40 is inserted in the direction of the arrow in the figure from the connector portion 61 towards the tube 62. After the stylet wire 40 is inserted, the female connector portion 20 is engaged with the connector portion 61 of the catheter 60, and the stylet connector 1 is connected to the catheter 60.

[0026] The stylet connector 1 and the catheter 60 are connected by connecting a male lure and a female lure that pairs with the male lure. The shapes of the male lure and the female lure are shapes defined by the ISO standard. The male connector portion 10 of the stylet connector 1 and the connector portion 61 of the catheter 60 both have male lures. The female connector portion 20 of the stylet connector 1 has a female lure. This makes it possible to connect the female connector portion 20 of the stylet connector 1 to the connector portion 61 of the catheter 60, and further to connect another connector having a female lure to the male connector portion 10 of the stylet connector 1. For example, in order to confirm the placement position, a syringe having a female lure can be connected to the male connector portion 10 of the stylet connector 1 connected to the catheter 60, and liquid or gas can be injected or aspirated from the syringe through the stylet connector 1 and the tube 62 of the catheter 60. Specifically, in order to confirm the placement position, after connecting a syringe, it is possible to aspirate bodily fluids (gastric juices) or flush with air.

[0027] Next, Fig. 3 is a perspective view of the stylet connector 1 of this embodiment, as viewed from the opening 24 side of the female connector portion 20. Fig. 3 shows the state before the stylet wire 40 is fixed to the stylet connector 1. The male connector portion 10 has a male luer therein. As shown in Fig. 3, a lock nut 16 is formed on the outer periphery of the male luer. An anti-slip ridge portion 19 is formed on the outer periphery of the lock nut 16. The ridge portions 19 are formed in a band shape along the axial direction of the male connector portion 10, and are disposed at equal intervals in the circumferential direction of the male connector portion 10. A screw thread 25 is provided on the outer periphery of the female connector portion 20, on the tip portion 21 side.

[0028] The internal structure of the stylet connector 1 of this embodiment will be described with reference to Figures 4 and 5. Figure 4 is a cross-sectional view taken along line AA in Figure 3. Figure 5 is a cross-sectional view taken along line BB in Figure 3. For ease of explanation, in this disclosure, the direction in the axial direction from the female connector portion 20 to the male connector portion 10 will be referred to as one axial side, and the opposite side will be referred to as the other axial side.

[0029] The stylet connector 1 has a hollow cylindrical shape and has a male connector portion 10 on one axial side and a female connector portion 20 on the other axial side. A flow path 30 that connects the interior of the male connector portion 10 and the interior of the female connector portion 20 is formed inside the stylet connector 1.

[0030] The male connector part 10 is a cylindrical member in which a flow path 30 for flowing a nutrient is formed. It has a cylindrical male lure 11 extending in the axial direction around the center in the radial direction. The male lure 11 has an opening 15 at a tip end 12 on one axial side. A base end 13 on the other axial side is connected to a base end 22 of a female connector part 20 described later. The inside of the male lure 11 of the male connector part 10 forms a male connector side flow path 31 from the tip end 12 to the base end 13. The male lure 11 has a tapered surface 18 whose outer diameter becomes smaller from the base end 13 to the tip end 12. The male lure 11 is formed so as to be insertable into a syringe or the like having a female lure.

[0031] The male connector portion 10 has a lock connector configuration having a lock nut 16 on the radial outside of the male lure 11. A screw 17 is formed in a spiral shape on the inner peripheral surface of the lock nut 16. The gap between the inner peripheral surface of the lock nut 16 and the outer peripheral surface of the male lure 11 is formed to a size that allows another female connector to be inserted. The screw 17 is formed to engage with a thread provided on the outer peripheral side of the female connector. By engaging the screw 17 with the thread of the female connector and tightening it, the connection reliability between the connectors can be improved. It is not necessary to provide a lock connector configuration. A configuration in which the outer peripheral surface of the male connector engages with the inner peripheral surface of the female connector by friction (slip connector configuration) may be used.

[0032] The stylet connector 1 is integrally formed by injection molding or the like, except for the stylet wire 40. Alternatively, the stylet connector 1 may be composed of separate separable members.

[0033] The female connector portion 20 is a cylindrical member having a flow path 30 formed therein for flowing nutrients. It has a hollow cylindrical shape that pairs with the male luer 11 and is formed so as to be connectable to a male luer of another connector. A base end portion 22 on one axial side of the female connector portion 20 is connected to a base end portion 13 of the male connector portion 10, and together they form the stylet connector 1. A tip end portion 21 on the other axial side of the female connector portion 20 has an opening portion 24.

[0034] The inner peripheral surface of the female connector portion 20 has a tapered surface 26 that widens from the base end portion 22 toward the tip end portion 21. The inclination of the tapered surface 26 is formed in a shape that engages with the tapered surface of the outer peripheral surface of a male luer (not shown) in the connector portion 61 of the catheter 60.

[0035] As shown in Fig. 5, a thread portion 25 is provided on the outer peripheral surface of the female connector portion 20 on the side of the tip portion 21. The thread portion 25 engages with a lock nut of another connector to lock the connection between the female connector portion 20 and the other connector. In the present disclosure, a female thread portion (not shown) is formed inside the lock nut 65 of the connector portion 61 of the catheter 60. When the stylet connector 1 is connected to the catheter 60, the thread portion 25 of the female connector portion 20 and the female thread portion of the connector portion 61 can be engaged and tightened to fix the connection.

[0036] Flow path 30 is a hole that penetrates the center of the interior of stylet connector 1, and is a passage through which liquid such as nutrients flows in. Flow path 30 is composed of a male connector side flow path 31 inside the male connector portion 10 and a female connector side flow path 32 inside the female connector portion 20. A holding portion 50, which will be described later, is provided inside flow path 30.

[0037] The retaining portion 50 is provided in the flow path 30, specifically, in the female connector side flow path 32 of the female connector portion 20. In the example of Fig. 4, the retaining portion 50 extends in the axial direction of the female connector portion 20 from near the connection portion 14 between the male connector portion 10 and the female connector portion 20 to near the center of the female connector portion 20 in the axial direction. The shape of the retaining portion 50 is a columnar body, but is not particularly limited to this.

[0038] The holding portion 50 has a connection portion 51 that connects to the inner wall of the female connector portion 20 in the flow path 30. In the embodiment shown in FIG. 5, the inner peripheral surface of the female connector portion 20 has the connection portion 51 at both ends in the radial direction. The connection portion 51 may be provided on only one side in the radial direction on the inner peripheral surface of the female connector portion 20. The shape of the holding portion 50 is not limited to a columnar body. It may have any shape that can hold the wire inside. The connection portion 51 can be provided appropriately according to the shape of the holding portion 50.

[0039] The holding portion 50 is preferably provided within the female connector side flow path 32. As described below, since the stylet wire 40 is pressed in from the opening 24 side of the female connector portion 20, the pressing operation is easier when the pressing position is closer to the opening 24. The position of the holding portion 50 within the flow path 30 is preferably as far back as possible (on one axial side) in order to ensure the depth of the tapered surface 26 of the female connector portion 20. Furthermore, since length is necessary as a fixing structure for the stylet wire 40, it is preferable that the holding portion 50 extends to near the axial center of the female connector portion 20.

[0040] 4 and 5, before the stylet wire 40 is fixed, the holding part 50 has a guide hole 52 on the opening 24 side of the female connector part 20 and a wire insertion hole 53 extending to one axial side. As will be described later, the stylet wire 40 is press-fitted into the wire insertion hole 53 while melting the guide hole 52 and wire insertion hole 53 of the holding part 50, so that after the stylet wire 40 is fixed, the resin on the inner surfaces of the guide hole 52 and wire insertion hole 53 fills the irregularities 44 on the surface of the stylet wire 40. It should be noted that the guide hole 52 is not essential. The presence of the guide hole 52 makes it easier to guide the wire when it is press-fitted as described later.

[0041] From the other axial side of holding portion 50 toward one axial side, the central axes of guide hole 52 and wire insertion hole 53 are formed to coincide with the central axis of female connector portion 20. This makes it possible to configure the central axis of stylet wire 40 to coincide with the central axis of female connector portion 20 after stylet wire 40 is press-fitted into holding portion 50.

[0042] The central axis of the stylet wire 40 is preferably held so as to coincide with the central axis of the female connector portion 20. In this case, when the stylet connector 1 is connected to the catheter 60, the central axis of the stylet wire 40 and the central axis of the connector of the catheter 60 also coincide. Therefore, the stylet wire 40 is less likely to come into contact with the inner surface of the connector portion 61 of the catheter 60, causing abrasion or damage to the connector portion 61.

[0043] As shown in Figs. 4 and 5, the guide hole 52 is a truncated cone-shaped hole that opens to the other axial side and has a slightly smaller diameter toward the one axial side. The diameter φ3 at the opening of the guide hole 52 is larger than the maximum outer diameter φ1 of the stylet wire 40. This is to facilitate the guiding of the stylet wire 40 when it is pressed in, as described below. The inner diameter φ4 of the wire insertion hole 53 is slightly smaller than the maximum outer diameter φ1 of the stylet wire 40. This is to allow the inner surface of the wire insertion hole 53 to melt and fill the irregularities 44 on the surface of the stylet wire 40 with resin when the stylet wire 40 is pressed in. The inner diameter φ4 of the wire insertion hole 53 may be formed slightly larger than the outer diameter of the wire. When the wire is pressed in, the resin returns, so that the irregularities of the wire are filled with resin. The inner diameter φ4 of the wire insertion hole 53 can be set appropriately in relation to the length L1 of the wire 40 to be pressed in, as described below.

[0044] Figure 6 is an axial cross-sectional view of the stylet connector 1. This shows the stylet wire 40 after it has been fixed to the holding portion 50. The stylet wire 40 is made of a metal wire. The maximum radial outer diameter φ1 of the axis of the stylet wire 40 is smaller than the inner diameter φ2 of the tube 62, and is formed so as to be insertable into the tube 62 (see Figure 2). The stylet wire 40 is freely bendable, and serves as a guide when inserted into the tube 62 of the catheter 60 to guide the catheter 60 to the affected area. The tip of the stylet wire 40 is rounded by welding.

[0045] The stylet wire 40 has at least one unevenness 44 formed on the entire surface. When the stylet wire 40 is fixed to the holding part 50, the resin on the inner surfaces of the guide hole 52 and the wire insertion hole 53 of the holding part 50 melts and fills the unevenness 44, thereby fixing the stylet wire 40. The stylet wire 40 is formed by twisting a plurality of elongated wires 43, so that a plurality of unevenness 44 can be formed on the entire surface. Alternatively, the unevenness 44 may be formed by surface treating a single wire.

[0046] FIG. 7 is an enlarged view of the fixing portion of the stylet wire 40 and the holding portion 50. The figure shows how the stylet wire 40 is held inside the holding portion 50. The fixing structure of the stylet wire 40 to the holding portion 50 can be formed by thermal welding, which will be described later. As will be described in detail later, the stylet wire 40 is heated, one end 42 of the stylet wire 40 on one axial side is pressed into a guide hole 52 provided in the holding portion 50, and the stylet wire 40 is pressed into the holding portion 50 while melting the holding portion 50 with heat, thereby forming the fixing structure. The stylet wire 40 is formed as a single wire by twisting a plurality of wires 43, and thus the surface of the stylet wire 40 has an unevenness 44 formed by the plurality of wires 43. The holding portion 50 is filled with the molten resin constituting the holding portion 50 in the portion corresponding to the unevenness 44, forming a filling portion 54. The shape of the filling portion 54 is formed to match the shape of the unevenness 44 so that there are no gaps.

[0047] In the holding portion 50, the length L1 over which the stylet wire 40 is pressed is longer than the sum of the axial length L2 of the guide hole 52 before the stylet wire 40 is pressed in and the axial length L3 of the wire insertion hole 53. Therefore, the stylet wire 40 passes beyond the innermost part of the wire insertion hole 53 and is pressed into the inside of the holding portion 50 to form a fixed structure. By pressing the stylet wire 40 sufficiently deeper than the depth of the wire insertion hole 53, it is possible to avoid a situation in which the press-in is shallow and the fixing force is insufficient.

[0048] According to thermal welding, the holding portion 50 made of resin can be melted and the stylet wire 40 can be pressed into it, and when the resin cools and hardens, the stylet wire 40 can be naturally fixed in place. Therefore, a fixing structure for the stylet wire 40 in the holding portion 50 can be formed without using an adhesive. Note that, in addition to this method, the fixing structure for the stylet wire 40 to the holding portion 50 can also be formed by insert molding.

[0049] Next, a method of forming a fixing structure for fixing stylet wire 40 to holding portion 50 will be described. Fig. 8 shows a cross-sectional view taken along line AA in Fig. 3, similar to Fig. 4. Fig. 8 is a diagram showing a method of forming a fixing structure using induction heating. A coil 70 made of a metal wire is disposed near opening 24 of female connector portion 20. Coil 70 forms a circular outer edge 71 and a hollow portion 72. Stylet wire 40 is disposed in hollow portion 72 of coil 70.

[0050] Coil 70 is connected to a power supply device (not shown). By passing a high-frequency current from the power supply device through coil 70, a high-frequency magnetic field is generated in the axial direction of hollow portion 72. A current flows in stylet wire 40 due to electromagnetic induction caused by this high-frequency magnetic field, and stylet wire 40 generates heat due to electrical resistance.

[0051] One end 42 of stylet wire 40, which has been heated by electromagnetic induction, is pressed into guide hole 52 of holding portion 50 from the opening side. The heat near one end 42 of stylet wire 40 melts the resin that forms holding portion 50, allowing stylet wire 40 to be pressed into guide hole 52 in the direction of wire insertion hole 53. As described above, the inner diameter φ4 of wire insertion hole 53 is slightly smaller than the maximum outer diameter φ1 of stylet wire 40, so that as stylet wire 40 is pressed into, the inner circumferential surface of wire insertion hole 53 melts, and the molten resin fills irregularities 44 on the surface of stylet wire 40 without leaving any gaps, forming filled portion 54.

[0052] After the stylet wire 40 has been press-fitted to a predetermined length, the resin that constitutes the holding portion 50 is allowed to harden while filling the irregularities 44 of the stylet wire 40. As a result, the stylet wire 40 is fixed to the holding portion 50.

[0053] Induction heating can reduce the influence of heat on the components during the manufacturing process. That is, induction heating can locally heat only the portion of the stylet wire 40 placed in the hollow portion 72 of the coil 70. Therefore, only the vicinity of the one end 42 of the stylet wire 40 can be heated. The guide hole 52 and the wire insertion hole 53 of the holding portion 50 can be melted near the heated one end 42 of the stylet wire 40, and the stylet wire 40 can be press-fitted. The portion of the stylet wire 40 away from the one end 42 that is not press-fitted into the holding portion 50 does not generate heat. Therefore, when the stylet wire 40 is press-fitted, the female connector portion 20 is not deformed by the heat of the stylet wire 40 other than the vicinity of the one end 42. Furthermore, even if other portions of the stylet wire 40 other than the one end 42 come into contact, they are not deformed by heat.

[0054] The stylet connector manufactured by the above method does not use adhesive, so there is no risk of adhesive leaking into the connector during the manufacturing process. Therefore, there is no problem with the conventional method of incomplete adhesion of the tapered surfaces of the connectors due to the adhesion of adhesive. Furthermore, in conventional manufacturing methods, depending on the material from which the connector is made, the adhesive may easily peel off. In the stylet connector of this embodiment, the stylet wire is fixed by the resin that forms the holding portion, so it is stronger than a structure solidified with adhesive.

[0055] The method of forming the fixing structure that fixes the stylet wire 40 to the holding portion 50 is not limited to the above. For example, the stylet wire 40 may be molded integrally with the stylet connector 1 by insert molding. In insert molding, injected resin fills the irregularities 44 of the stylet wire 40 to form filled portion 54, which is then hardened to achieve fixation. A fixing structure formed by insert molding can also achieve the same effects as when formed by induction heating.

[0056] It should be noted that the present invention is not limited to the above-described embodiment and its modified examples, and various modifications and improvements are possible within the scope of the matters described in the claims of this application. [Explanation of symbols]

[0057] 1 Stylet connector, 10 Male connector portion, 11 Male luer, 12 Tip portion, 13 Base end portion, 14 Connection portion, 15 Opening portion, 16 Lock nut, 17 Screw, 18 Tapered surface, 19 Convex portion, 20 Female connector portion, 21 Tip portion, 22 Base end portion, 23 Connection portion, 24 Opening portion, 25 Thread portion, 26 Tapered surface, 30 Flow path, 31 Male connector side flow path, 32 Female connector side flow path, , 40 Stylet wire, 42 One end, 43 Multiple wires, 44 Irregularities, 45 Stylet wire surface, , 50 Holding portion, 51 Connection portion, 52 Guide hole, 53 Wire insertion hole, 60 Catheter, 61 Connector portion, 62 Tube, 63 Tip portion, 64 Cap, 65 Lock nut, 70 Coil, 71 Outer edge, 72 Hollow portion, L1 Press-in length of stylet wire, L2 axial length of guide hole, L3 axial length of wire insertion hole, φ1 maximum outer diameter of stylet wire, φ2 inner diameter of tube, φ3 maximum diameter of guide hole, φ4 inner diameter of wire insertion hole

Claims

[Claim 1] A wire, A holder for the wire; Equipped with The wire has at least one irregularity on a surface thereof; A connector, wherein the retaining portion retains the wire by filling the unevenness of the wire with a resin that forms the retaining portion.

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