Fixing structure of insertion component

Abstract

The fixing structure comprises: a transmission line (2) inserted into the skin (S); a fixing member (3) fixed to the skin (S) and for the transmission line (2) to be inserted through; and a holding mechanism (4) for holding the transmission line (2), wherein the holding mechanism (4) comprises: a clamping member (51) for clamping the transmission line (2); a sealing member (53); and a threaded member (52) for pressing the clamping member (51) and the sealing member (53), wherein the sealing member (53) comprises: a main body (91) inserted into the transmission line (2); an annular protrusion (92), wherein the annular protrusion (92) protrudes from the end of the main body (91) and gradually decreases in cross-sectional diameter toward the protruding direction, and the annular protrusion (92) is bent and deformed radially inward of the sealing member (53) by abutting against the end face of the clamping member (51). This structure provides a compact insertion member fixing structure having a sealing member that allows a member provided in the insertion member and having an outer diameter sufficiently larger than that of the insertion member to easily penetrate and ensures sufficient close contact with the insertion member.

Description

Technical Field

[0001] The present invention relates to a fixing structure of an insertion member. Background Art

[0002] Conventionally, there is known a fixing structure that holds an insertion member inserted into an object and fixes it to the object.

[0003] For example, Patent Document 1 discloses a percutaneous catheter placement assembly comprising: a percutaneous terminal (fixing member) having a through-path (insertion hole); a catheter (insertion member) inserted into the through-path; and a cap (threaded member) formed to threadably engage with the head of the percutaneous terminal and to press an annular rubber elastic body (sealing member) disposed around the fixing portion of the catheter to secure the catheter.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 3-254758 Summary of the Invention

[0007] Summary of the Invention

[0008] Problems to be solved by the invention

[0009] However, in general annular sealing components such as O-rings, in order to improve the tightness such as air tightness and liquid tightness, the inner diameter needs to be pre-set to be slightly smaller than the outer diameter of the target component that performs the sealing function, so that it can be assembled around the target component (radially outside).

[0010] Here, in a fixed structure using a medical tube as an insertion member, such as a skin button used in an artificial heart, a connector portion having an outer diameter sufficiently larger than that of the insertion member is provided at the front end of the insertion member on the side exposed to the body. Therefore, in a general sealing member such as the above-mentioned one, it is difficult to pass the connector portion through, and it is very difficult to arrange the sealing member at a predetermined position of the fixed structure.

[0011] On the other hand, as a solution to such a problem, for example, it is possible to consider forming the sealing member into a long cylindrical shape with an inner diameter that is sufficiently large compared to the outer diameter of the connector part, and after being arranged at a specified position of the fixed structure, compressing it in the axial direction so that the inner circumference is elastically deformed radially inward. However, the structure of the fixed structure as a whole becomes complicated, and the external shape becomes too large, so it lacks realism.

[0012] The object of the present invention is to provide a compact insertion member fixing structure having a sealing member, which can easily allow a member (for example, a connector part) provided on the insertion member and having an outer diameter sufficiently larger than the outer diameter of the insertion member to pass through, and can ensure sufficient tightness to the insertion member.

[0013] Solutions to Problems

[0014] The problems to be solved by the present invention are as described above, and the means for solving the problems will be described below.

[0015] The fixing structure of the insertion member of the present invention comprises: an insertion member for inserting into an object; a fixing member fixed to the object, having an insertion hole for inserting the insertion member; and a holding mechanism for holding the insertion member in the fixing member, wherein the fixing structure of the insertion member is characterized in that the fixing member has an internal threaded portion at one axial end of the insertion hole, and the fixing member has a fixing member-side fitted portion whose cross-sectional shape gradually decreases from one end side toward the other end side in the middle part of the axial direction, and the holding mechanism comprises: a clamping member having a first clamping member-side fitting portion formed in accordance with the shape of the fixing member-side fitted portion, and the first clamping member-side fitting portion is fitted into the fixing member-side fitted portion between the outer peripheral surface of the insertion member and the inner peripheral surface of the insertion hole. The cam is threadedly connected to the sealing member so as to prevent the sealing member from sliding into the sealing member, so that the sealing member can be pressed toward the other end side of the axial direction by screwing the external threaded portion and the internal threaded portion. The sealing member comprises: a main body portion, which is inserted into the insertion member; and an annular protrusion portion, which protrudes from the end portion of the other end side of the main body portion toward the other end side of the axial direction, and the cross-sectional shape gradually decreases in diameter toward the protruding direction, and the annular protrusion is bent and deformed toward the radial inner side of the sealing member by abutting against the end face of the one end side of the axial direction of the chuck member.

[0016] Effects of the Invention

[0017] The present invention produces the following effects.

[0018] That is, according to the fixing structure of the insertion member of the present invention, a compact fixing structure of the insertion member having a sealing member can be realized, which sealing member can easily allow a member (for example, a connector part) provided in the insertion member and having an outer diameter sufficiently larger than the outer diameter of the insertion member to pass through and can ensure sufficient tightness relative to the insertion member. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side partial cross-sectional view of a fixing structure according to one embodiment.

[0020] Figure 2 yes Figure 1 An exploded perspective view of the main parts of the described fixing structure.

[0021] Figure 3 yes Figure 1 A partially enlarged cross-sectional view of the retaining mechanism described.

[0022] Figure 4 It is an explanation Figure 1 A diagram illustrating the assembly method of the described fixing structure.

[0023] Figure 5 It is an explanation Figure 1 A diagram illustrating the assembly method of the described fixing structure.

[0024] Figure 6 It is an explanation Figure 1 A diagram illustrating the assembly method of the described fixing structure.

[0025] Figure 7 It is a side partial cross-sectional view of a fixing structure of a modified example.

[0026] Figure 8 yes Figure 7 An exploded perspective view of the main parts of the described fixing structure. DETAILED DESCRIPTION

[0027] Next, embodiments of the invention will be described. First, a fixing structure 1 for an insertion member according to one embodiment of the present invention will be described. In this embodiment, the axial end side refers to the outer side of the insertion member along the axial direction, and the axial end side refers to the inner side of the insertion member along the axial direction.

[0028] The fixing structure 1 of this embodiment is used to secure an insertion member inserted into an object. Here, "insertion" refers to a state where a member having a length, i.e., the insertion member, exists at least inside and outside the fixing structure 1. The insertion member may or may not penetrate the object, as long as the portion inserted into the object remains. The object has a hole for the insertion member to pass through, and the insertion member is inserted through the hole.

[0029] In this embodiment, a transmission line 2, which is an example of an insertion member and a type of medical tube, is guided from the skin S of the object to the target site in the body. It should be noted that the insertion member is not limited to the transmission line 2 and can be, for example, a catheter, other medical tubes, or a solid medical cable, or other lengthy member. Furthermore, the object through which the insertion member is inserted can be a body cavity for percutaneous insertion, but is not limited to the skin. Priority is given to objects such as organs, bones, and other biological elements that require suppression of bacterial invasion, such as a living organism.

[0030] <Structure of fixed structure>

[0031] Next, use Figure 1 and Figure 2 , the overall structure of the fixing structure 1 of this embodiment is described.

[0032] The fixing structure 1 of this embodiment includes: a transmission wire 2 serving as an insertion member; a fixing member 3 fixed to the skin S of the target object, having an insertion hole 33 through which the transmission wire 2 is inserted; and a retaining mechanism 4 for retaining the transmission wire 2 relative to the fixing member 3. Here, the fixing member 3 being fixed to the skin S means that the fixing member 3 is fixed to the skin S by anchoring (fixing) a portion of the skin S to the surface of the fixing member 3.

[0033] The transmission line 2 is a cylindrical member that is inserted into the human body and is a type of medical tube. The portion of the outer peripheral surface (outer surface) of the transmission line 2 that is inserted into the human body is covered with fibers. The inner end of the transmission line 2 is connected to a medical device (not shown) disposed in the body, and the outer end of the transmission line 2 is connected to a device (not shown) disposed outside the body. A connector portion 10 (see FIG. 1 ) for connecting to a device (not shown) is installed at the outer end of the transmission line 2. Figure 4 Typically, the outer diameter of the connector portion 10 is larger than the outer diameter of the transmission wire 2 .

[0034] In this embodiment, the medical device arranged in the body is an auxiliary artificial heart. The auxiliary artificial heart is a component having a pump that circulates blood in the body. In addition, the device arranged outside the body includes: a pressure delivery pump that delivers cooling water for cooling the pump; and a power supply that transmits electricity to the pump. The transmission line 2 has: a cooling water circulation path 11 that circulates cooling water between the pressure delivery pump and the auxiliary artificial heart; and a power cable 12 that connects the power supply to the pump. It should be noted that the structure of the transmission line 2 is not limited to this, and a known structure can be adopted. For example, the transmission line 2 can be set as a structure having only a power cable 12, or a structure having only a cooling water circulation path 11, or a structure having components with other functions.

[0035] The fixing member 3 has: a fixing portion 21 fixed to the skin S; and an insertion portion 22 for the transmission line 2 to pass through. Here, at least a portion of the fixing member 3 is subjected to surface treatment in order to promote anchoring of a portion of the skin S, which will be described in detail later. Moreover, the material of the fixing member is not particularly limited as long as it has the rigidity to be fixed to the object. In the case of a member fixed to the skin S as a biological tissue as in the present embodiment, it is preferably formed of a material with high biocompatibility. Examples of materials with high biocompatibility include polyester, polyetheretherketone, silicon, titanium, titanium alloy, and the like. It should be noted that in the fixing portion 21, a porous material that allows cells to invade is formed on the surface by a mesh of titanium fibers, etc., thereby improving the adhesion between the fixing portion 21 and the skin S and preventing the invasion of bacteria into the biological body.

[0036] The fixing portion 21 is a portion that is fixed to the skin S being treated, specifically, the portion that is fixed to the skin S around the hole provided in the skin S. The fixing portion 21 is provided on the periphery of the insertion portion 22, and the fixing portion 21 and the insertion portion 22 are integrally formed. It should be noted that in this embodiment, the fixing portion 21 and the insertion portion 22 are integrally formed, but this is not limited to this. For example, a structure in which the fixing portion 21 is provided separately on the periphery of the insertion portion 22 and fixed by welding or the like may also be employed.

[0037] The insertion portion 22 is the portion through which the transmission wire 2 is inserted and is formed in a generally cylindrical shape. The insertion portion 22 comprises: a first opening 31 at one axial end; a second opening 32 at the other axial end; an insertion hole 33 connecting the first opening 31 and the second opening 32; a fixed member-side engaged portion 34 provided midway along the inner surface of the insertion hole 33 in an axial direction, with a cross-sectional shape gradually decreasing in diameter from the first opening 31 toward the second opening 32; and an internal thread 35 provided in the first opening 31, which serves as one axial end of the insertion hole 33. Note that the thread groove and other elements of the internal thread 35 are omitted in the drawings.

[0038] The first opening portion 31 is an opening portion provided on the outside of the body of the insertion portion 22, and the second opening portion 32 is an opening portion provided on the inside of the body. The first opening portion 31 is formed in a manner such that the opening surface is orthogonal to the axial direction of the insertion portion 22. The second opening portion 32 is formed in a manner such that the opening surface is non-orthogonal to the axial direction of the insertion portion 22. The cross-section of the first opening portion 31 is formed in a circular shape, and the cross-sectional diameter is formed to a length substantially the same as the outer diameter of the threaded member 52 described later. The cross-section of the second opening portion 32 is formed in an elliptical shape, and the cross-sectional area of ​​the second opening portion 32 is formed to be larger than the cross-sectional area when the transmission line 2 is cut along a direction parallel to the second opening portion 32.

[0039] The insertion hole 33 is a hole for the transmission line 2 to pass through, and is formed into a circular shape when viewed in cross section. The insertion hole 33 is configured so that the central axis is a straight line. It should be noted that the insertion hole 33 is formed so that the central axis is a straight line, but is not limited to this. For example, it can also be formed so as to bend or bend in the middle. Moreover, in the present embodiment, the insertion hole 33 is configured so as to be inclined relative to the fixing portion 21, but the inclination angle is not particularly limited. Moreover, the insertion hole 33 can also be formed orthogonally to the object.

[0040] The fixing member side engaged portion 34 is a portion provided on the inner surface of the insertion hole 33, and is provided in a manner that the inner diameter decreases from the first opening portion 31 toward the second opening portion 32. The fixing member side engaged portion 34 is provided in a manner that the inclination angle becomes constant. That is, the fixing member side engaged portion 34 is provided in a manner that the inclination angle becomes constant. Figure 1 It should be noted that the fixed member side engaged portion 34 is formed in a manner such that the inclination angle is constant, but this is not limited to the present embodiment. For example, the inclination angle may be increased toward the second opening 32. In this case, the fixed member side engaged portion is formed in a manner such that the inclination angle is constant. Figure 1 The cross section shown is configured to be curved.

[0041] The internal thread portion 35 is a portion provided on the inner peripheral surface of the first opening portion 31. The internal thread portion 35 is threadedly engaged with a later-described external thread portion 72.

[0042] A square ring 78 is also disposed on the inner periphery of the insertion hole 33. The square ring 78 is positioned between the inner periphery of the insertion hole 33 and the outer periphery of the screw member 52, and assists in the liquid-tight seal between the insertion portion 22 and the screw member 52. It should be noted that the square ring 78 can also be attached to the outer periphery of the screw member 52.

[0043] The holding mechanism 4 of this embodiment is a mechanism for holding the transmission wire 2 relative to the fixing member 3 and has a mechanism for keeping the inner side of the body liquid-tight. The holding mechanism 4 includes a chuck member 51 , a screw member 52 , and a sealing member 53 .

[0044] The chuck member 51 is a member for fastening and clamping an insertion member such as the transmission wire 2. The chuck member 51 has a first chuck member-side fitting portion 61, which is arranged on the outer peripheral surface of the other axial end side and is formed in accordance with the shape of the fixed member-side fitting portion 34. The chuck member 51 has a second chuck member-side fitting portion 62, which is arranged on the outer peripheral surface of one axial end side and is fitted with the sealing member 53 and the threaded member 52. The chuck member 51 has a clamping portion 63, which is arranged on the inner side and tightly clamps the outer periphery of the transmission wire 2. The chuck member 51 has an end face 64 on the one axial end side that abuts the sealing member 53.

[0045] The chuck member 51 is a member disposed between the inner circumference of the insertion hole 33 and the outer circumference of the transmission wire 2. It is a member that has the function of clamping the transmission wire 2 by tightening it in the retaining mechanism 4 and the function of achieving a liquid seal. The material of the chuck member 51 is not particularly limited, but as a material capable of achieving the functions of holding the transmission wire 2 and achieving a liquid seal, a material that can be slightly deformed to the extent that the transmission wire 2 can be tightened can be used. The chuck member 51 of this embodiment is formed of a metal with high corrosion resistance and having a hardness equivalent to that of the metal forming the fixing member 3 or a metal with a hardness lower than that of the metal forming the fixing member 3. The metal with high corrosion resistance is, for example, titanium or a titanium alloy.

[0046] The first clamping member side fitting portion 61 is a portion that fits with the fixed member side fitting portion 34 when the clamping member 51 is arranged in the insertion hole 33. The first clamping member side fitting portion 61 fits with the fixed member side fitting portion 34 and is configured so that a force in the direction of the clamping member 51 shrinking (a force toward the transmission line 2 side) is applied from the fixed member side fitting portion 34 to the clamping member 51. In this embodiment, the first clamping member side fitting portion 61 is configured by an inclined surface having the same inclination angle as that of the fixed member side fitting portion 34. In other words, the first clamping member side fitting portion 61 is configured to fit with the fixed member side fitting portion 34 by surface contact with the fixed member side fitting portion 34. That is, in the first clamping member side fitting portion 61, an inclined surface having the same inclination angle as that of the fixed member side fitting portion 34 is preferably formed in at least a portion.

[0047] The first chuck member side fitting portion 61 is formed of an inclined surface, but is not limited thereto. Any shape may be used as long as it can at least withstand the force in the direction of pressing the chuck member 51 toward the first opening 31 from the fixing member side fitting portion 34 .

[0048] The second chuck member-side fitting portion 62 is a portion that fits with the sealing member 53 and the screw member 52 when the chuck member 51 is positioned in the insertion hole 33. The second chuck member-side fitting portion 62 is configured as an inclined surface formed on the first opening 31 side of the chuck member 51. The second chuck member-side fitting portion 62 fits with a front end fitting portion 74 of the screw member 52, described later, and is configured so that a force in the direction of reducing the diameter of the chuck member 51 (a force toward the transmission wire 2) is applied from the front end fitting portion 74 to the chuck member 51.

[0049] Furthermore, the front end fitting portion 74 of the threaded member 52 also receives a force directed radially outward from the second chuck member-side fitting portion 62. In this embodiment, the second chuck member-side fitting portion 62 is formed by an inclined surface having the same inclination angle as the front end fitting portion 74, which is an inclined surface. In other words, the second chuck member-side fitting portion 62 is configured to fit with the front end fitting portion 74 through surface contact with the front end fitting portion 74. In other words, the second chuck member-side fitting portion 62 is preferably formed with an inclined surface having the same inclination angle as the front end fitting portion 74 in at least a portion of the second chuck member-side fitting portion 62.

[0050] The second chuck member side fitting portion 62 is formed of an inclined surface, but is not limited thereto. Any shape may be used as long as it can at least withstand the force from the screw member 52 in the direction of pressing the chuck member 51 toward the second opening 32 .

[0051] The clamping portion 63 is a portion that fits into the outer periphery of the transmission wire 2. In this embodiment, it is the entire inner periphery of the clamping member 51. The clamping member 51 has a connecting hole that connects the opening portion on the side of the first opening portion 31 and the opening portion on the side of the second opening portion 32, and clamps the transmission wire 2 so that the transmission wire 2 extends from these openings. Figure 1 As shown, the clamping portion 63 is provided with a circular cross-section and is formed in a manner that the cross-section diameter becomes uniform. It should be noted that the clamping portion 63 is formed in a manner that the cross-section diameter becomes uniform, but is not limited to this. For example, a step portion formed in a manner that the cross-section diameter is expanded may also be provided in the central portion.

[0052] The end surface 64 is the portion that abuts against the annular protrusion 92 (described later) of the sealing member 53 when the chuck member 51 is positioned in the insertion hole 33. The end surface 64 is formed by a surface parallel to the radial direction of the insertion portion 22 and is formed continuously with the second chuck member-side fitting portion 62. It should be noted that the end surface 64 is formed by a surface parallel to the radial direction of the insertion portion 22, but is not limited to this. Any shape can be used as long as it can withstand the force from the annular protrusion 92 of the sealing member 53 pressing the chuck member 51 toward the second opening 32.

[0053] like Figure 2As shown, the chuck member 51 of this embodiment is composed of a first chuck member 65 and a second chuck member 66 that are divided in the radial direction and integrated into a roughly cylindrical body. The chuck member 51 is formed by joining the joint surface 67 of the first chuck member 65 with the joint surface 68 of the second chuck member 66. In addition, a recess 69 is provided on the outer peripheral surface of the chuck member 51. The recess 69 is provided to prevent the chuck member 51 from sliding when it is engaged with the engaged portion 34 and the front end engaging portion 74 on the fixed member side. It should be noted that the structure of the chuck member 51 is not limited to a structure divided in the radial direction, and can also be a structure divided in the axial direction or a structure that is not divided.

[0054] The threaded member 52 is a member that is arranged on one axial end side relative to the sealing member 53 and has an externally threaded portion 72 that can be threadedly engaged with the internally threaded portion 35. The threaded member 52 is threadedly engaged with the internally threaded portion 35, thereby pressing the chuck member 51 and the sealing member 53 toward the other axial end side. The threaded member 52 includes a threaded member insertion path 71 through which the transmission wire 2 is inserted, an externally threaded portion 72 provided on the outer peripheral surface, and a front end portion 73 that is inserted into the insertion portion 22. The threaded member 52 includes a front end fitting portion 74 provided inside the front end portion 73 and fitted with the second chuck member-side fitting portion 62, and a threaded member fitting portion 75 that fits with the sealing member 53.

[0055] The threaded member 52 is a member disposed between the inner circumferential surface of the insertion hole 33 and the outer circumferential surfaces of the sealing member 53 and the chuck member 51. It has the function of shielding the first opening 31 and pressing the chuck member 51 and the sealing member 53 in the retaining mechanism 4. The material of the threaded member 52 is not particularly limited, as long as it can achieve the functions of shielding the first opening 31 and pressing the chuck member 51 and the sealing member 53. In this embodiment, the threaded member 52 is formed of a highly corrosion-resistant metal having a hardness equivalent to or lower than that of the metal forming the fixing member 3. Examples of highly corrosion-resistant metals include titanium or a titanium alloy.

[0056] The screw member insertion path 71 is a passage for passing the transmission wire 2 provided inside the screw member 52. The screw member insertion path 71 is provided from one end portion in the axial direction to a midway portion and has a diameter larger than the outer diameter of the connector portion 10.

[0057] The external thread portion 72 is provided on the outer circumferential surface of the threaded member 52 and is threadedly engaged with the internal thread portion 35. The distal end portion 73 is inserted into the insertion hole 33 of the fixing member 3 and is provided with the external thread portion 72 on its outer circumferential surface. Note that the threads of the external thread portion 72 are not shown in the drawings.

[0058] The front end engaging portion 74 is provided on the inner circumferential surface of the front end portion 73 and engages with the second chuck member-side engaging portion 62. The front end engaging portion 74 is formed of an inclined surface having the same inclination angle as the inclined surface of the second chuck member-side engaging portion 62. It should be noted that the front end engaging portion 74 is formed of an inclined surface having the same inclination angle as the inclined surface of the second chuck member-side engaging portion 62, but is not limited to this. The shape of the front end engaging portion 74 can be any shape as long as at least a portion of the front end engaging portion 74 engages with the second chuck member-side engaging portion 62, thereby enabling the force in the direction of pressing the chuck member 51 toward the second opening 32 to be transmitted from the screw member 52.

[0059] The screw member fitting portion 75 is a portion that fits with the sealing member 53. Figure 3 As shown, the screw member fitting portion 75 includes: a pressing surface 81 parallel to the radial direction on the first opening portion 31 side; an abutting surface 82 parallel to the outer peripheral surface of the sealing member 53; and an abutting surface 83 whose inner diameter decreases as it moves from the first opening portion 31 side toward the second opening portion 32 side. It should be noted that the structure of the screw member fitting portion 75 is not limited to the structure shown in this embodiment as long as it fits with the sealing member 53 and has the pressing surface 81.

[0060] The sealing member 53 is a member disposed between the inner circumference of the threaded member 52 and the outer circumference of the transmission line 2, and has the function of holding the transmission line 2 by tightening and the function of achieving liquid sealing in the holding mechanism 4. The sealing member 53 is a member composed of a cylindrical elastic member and disposed on one end side in the axial direction relative to the chuck member 51. The material of the sealing member 53 can be an elastic member that has the function of holding the transmission line 2 by tightening and the function of achieving liquid sealing. As the elastic member, a resin material having elasticity is preferably used, and examples thereof include synthetic resins composed solely of elastic silicone resins, mixtures of synthetic resins and inorganic compounds, and the like.

[0061] The sealing member 53 includes a main body 91, an annular protrusion 92, and a sealing member-side fitted portion 93. The main body 91 is a cylindrical portion that is inserted into the transmission wire 2. Figure 4 As shown, the inner diameter of the main body 91 is configured to be larger than the outer diameter of the transmission line 2 and equal to or slightly smaller than the outer diameter of the connector 10. As a result, the sealing member 53 can be made as small as possible, and the connector 10 can be passed through while the sealing member 53 is elastically deformed. The outer peripheral surface of the main body 91 has a shape that conforms to the shape of the screw member fitting portion 75, as shown in FIG. Figure 3As shown, the main body 91 has a pressed surface 94 pressed by the pressing surface 81 of the screw member 52 and an abutted surface 95 abutting against the abutting surface 82 of the screw member 52. Thus, the main body 91 is fitted into the screw member 52. As a result, a liquid seal can be achieved on the outer peripheral surface of the main body 91.

[0062] like Figure 5 As shown, the annular protrusion 92 is a portion that protrudes from the other end of the main body 91 toward the other end in the axial direction and gradually decreases in cross-sectional diameter toward the protruding direction. In this embodiment, the annular protrusion 92 is configured to have a triangular cross-sectional shape. When the annular protrusion 92 is assembled, as shown in FIG. Figure 6 As shown, the end face 64 of one end side of the axial direction of the clamping member 51 abuts against the end face 64 of the axial direction of the clamping member 51. Figure 1 and Figure 3 As shown, the annular protrusion 92 is bent and deformed radially inward of the sealing member 53. As a result, the inner diameter of the annular protrusion 92 is smaller than the inner diameter of the main body 91, and it is in close contact with the end face 64 of the chuck member 51 and the outer peripheral surface of the transmission wire 2. As a result, the annular protrusion 92 securely holds the transmission wire 2, achieving a liquid-tight seal on the inner peripheral surface of the main body 91.

[0063] The shape of the annular protrusion 92 is not particularly limited as long as it can be bent and deformed radially inward of the sealing member 53 . For example, it may have a substantially triangular cross-section that bends radially inward.

[0064] like Figure 3 and Figure 5 As shown, the sealing member-side engaged portion 93 is an annular portion disposed radially outward from the annular protrusion 92 and formed to conform to at least the shape of the second chuck member-side engaged portion 62. In this embodiment, the sealing member-side engaged portion 93 is formed to have a triangular cross-sectional shape conforming to the abutment surface 83 of the second chuck member-side engaged portion 62 and the threaded member 52. As a result, the sealing member-side engaged portion 93 is tightly engaged with the second chuck member-side engaged portion 62 and the abutment surface 83. This further improves the close contact between the sealing member 53 and the chuck member 51 and the threaded member 52.

[0065] It should be noted that the structure of the sealing member 53 may be any structure as long as it includes the main body 91 and the annular protrusion 92 , and may not include the sealing member-side fitted portion 93 . The structure is not limited to that shown in this embodiment.

[0066] <Assembly of the fixed structure>

[0067] Next, use Figures 1 to 6 , explaining the assembly method of the fixing structure 1.

[0068] like Figure 4As shown, the transmission wire 2 is inserted into the insertion hole 33 of the fixing member 3. For example, the fixing member 3 can be inserted through the second opening 32 into the transmission wire 2, which extends from a hole provided in the skin S to the outside of the body.

[0069] Next, the clamping portion 63 of the first clamping member 65 constituting the clamping member 51 is brought into contact with the outer periphery of the transmission wire 2, and the clamping portion 63 of the second clamping member 66 is brought into contact with the outer periphery of the transmission wire 2. The clamping member 51 is arranged on the outer periphery of the transmission wire 2 by aligning the engaging surface 67 of the first clamping member 65 and the engaging surface 68 of the second clamping member 66.

[0070] Next, if Figure 5 As shown, the clamp member 51 is inserted into the insertion hole 33 from the first opening 31 side. Here, the first clamp member side fitting portion 61 of the clamp member 51 inserted into the insertion hole 33 abuts against the fixed member side fitting portion 34 of the fixing member 3, but at this point in time, they do not need to abut. Figure 4 As shown, the sealing member 53 penetrates the connector portion 10 and is fitted on the upper side (first opening 31 side) of the chuck member 51 on the outer periphery of the transmission line 2. Then, the threaded member 52 fitted with the square ring 78 penetrates the connector portion 10 and is fitted on the sealing member 53 on the outer periphery of the transmission line 2.

[0071] Next, if Figure 6 As shown, the threaded member 52 in which the sealing member 53 is engaged is moved along the transmission line 2, so that the external threaded portion 72 of the threaded member 52 is screwed into the internal threaded portion 35 of the fixed member 3. As a result, the threaded member 52 moves toward the other end side of the fixed member 3 in the axial direction. In addition, the front end engaging portion 74 of the threaded member 52 presses the second chuck member side engaging portion 62 of the chuck member 51. At the same time, the annular protrusion 92 of the sealing member 53 abuts against the end face 64 of the chuck member 51. At this time, when the first chuck member side engaging portion 61 of the chuck member 51 does not abut against the fixed member side engaged portion 34 of the fixed member 3, the chuck member 51 moves toward the other end side in the axial direction, and the first chuck member side engaging portion 61 abuts against the fixed member side engaged portion 34.

[0072] Furthermore, when the external thread portion 72 is screwed into the internal thread portion 35, as shown in FIG. Figure 1As shown, the annular protrusion 92 of the sealing member 53 is bent and deformed radially inward by the end surface 64 of the clamping member 51, closely adhering to the end surface 64 of the clamping member 51 and the outer peripheral surface of the transmission wire 2. Furthermore, the movement of the clamping member 51 is restricted, thereby completing the assembly of the threaded member 52 and the sealing member 53 to the fixed member 3, and the assembly of the fixed structure 1 is complete. It should be noted that the above assembly sequence is an example, and the assembly sequence until the external threaded portion 72 of the threaded member 52 is threadedly engaged with the internal threaded portion 35 of the fixed member 3 is not particularly limited.

[0073] <Effect>

[0074] As described above, the fixing structure 1 of this embodiment includes: a transmission wire 2 inserted through the skin S; a fixing member 3 fixed to the skin S and having an insertion hole 33 through which the transmission wire 2 is inserted; and a retaining mechanism 4 for retaining the transmission wire 2 on the fixing member 3. The fixing member 3 has an internal thread portion 35 at one axial end of the insertion hole 33 and a fixing member-side engaged portion 34 midway in the axial direction, the cross-section of which gradually decreases in diameter from one end toward the other end. The retaining mechanism 4 includes: a chuck member 51 having a first chuck member-side engaging portion 61 formed in accordance with the shape of the fixed member-side engaged portion 34, the first chuck member-side engaging portion 61 being engaged with the fixed member-side engaged portion 34 between the outer circumferential surface of the transmission wire 2 and the inner circumferential surface of the insertion hole 33 to clamp the transmission wire 2; a sealing member 53 formed of a cylindrical elastic member and disposed on one axial end side relative to the chuck member 51; and a threaded member 52 disposed on one axial end side relative to the sealing member 53 and having an external threaded portion 72 threadably engaged with the internal threaded portion 35. The threaded engagement of the external threaded portion 72 with the internal threaded portion 35 presses the chuck member 51 and the sealing member 53 toward the other axial end side. The sealing member 53 includes a main body 91 inserted through the transmission wire 2; and an annular protrusion 92 protruding from the other end side of the main body 91 toward the other axial end side, with a cross-sectional shape gradually decreasing in diameter toward the protruding direction. The annular protrusion 92 is bent and deformed radially inward of the sealing member 53 by contacting the end surface of the chuck member 51 on one axial end side.

[0075] According to this structure, for example, when a connector portion 10 having an outer diameter sufficiently larger than that of the transmission wire 2 is provided on the transmission wire 2, the inner diameter of the sealing member 53 needs to be set to a sufficient size to allow the connector portion 10 to pass therethrough. Furthermore, when the sealing member 53 is mounted at a predetermined position on the fixing structure 1, the annular protrusion 92 bends and deforms radially inwardly of the sealing member 53, thereby closely contacting the outer peripheral surface of the transmission wire 2.

[0076] Thus, without separately setting up a complex and large-scale structure, a fixed structure of the transmission line 2 having a sealing component 53 can be compactly realized, and the sealing component 53 can easily allow the connector part 10 provided on the transmission line 2 and having an outer diameter sufficiently larger than the outer diameter of the transmission line 2 to pass through, and can ensure sufficient tightness to the transmission line 2.

[0077] Furthermore, in the fixing structure 1 of this embodiment, the chuck member 51 includes a second chuck member-side fitting portion 62, whose cross-sectional shape gradually decreases from the other axial end toward the one end, at its end portion on the sealing member 53 side. The sealing member 53 includes an annular sealing member-side fitted portion 93, which is provided radially outward of the annular protrusion 92 and is formed in accordance with the shape of the second chuck member-side fitting portion 62.

[0078] With this configuration, the second chuck member-side fitting portion 62 of the chuck member 51 and the sealing member-side fitted portion 93 of the sealing member 53 are fitted in close contact with each other.

[0079] In addition, in the fixing structure 1 of the present embodiment, the transmission wire 2 is used, and the insertion member is a medical tube.

[0080] According to such a structure, even when the insertion member is a medical tube, there is no need to set up a complex and large-scale structure separately, and the fixing structure 1 of the medical tube having the sealing member 53 can be compactly realized. The sealing member 53 can easily allow the connector part 10 provided on the medical tube and having an outer diameter sufficiently larger than the outer diameter of the medical tube to pass through, and can ensure sufficient close contact with the medical tube.

[0081] <Modification>

[0082] use Figure 7 and Figure 8 Next, a modified example of the fixing structure of the present invention will be described. The main difference between this modified example fixing structure 100 and the aforementioned fixing structure 1 is that a kink preventer 101, which prevents bending or radial torsion of the transmission wire 2, is provided at the extracorporeal end of the threaded member 52. Other aspects are similar to the fixing structure 1 of the aforementioned embodiment, and therefore their description will be omitted. The following describes the kink preventer 101.

[0083] The kink protector 101 includes a fixing portion 111 fixed to the screw member 52 and an insertion portion 112 through which the transmission cable 2 is inserted. In this modified embodiment, the fixing portion 111 is made of silicone, but its material is not particularly limited and may also be made of, for example, a hard synthetic resin. Furthermore, in this modified embodiment, the kink protector 101 is partially covered by a cover member 116.

[0084] The fixing portion 111 is a member fixed to the threaded member 52, and includes a fitting portion 113 that fits with the threaded member 52 and a flange portion 114 having substantially the same diameter as the end portion on one axial side of the threaded member 52. A fitting hole 79 is provided at the end portion on one axial side of the threaded member 52 for fitting the fitting portion 113 of the kink protector 101. A claw portion 115 that protrudes in the radial direction is provided on the outer peripheral surface of the fitting portion 113. The kink protector 101 is fixed to the threaded member 52 by engaging the claw portion 115 with a recess provided in the fitting hole 79. In this modified example, the claw portion 115 enters the fitting hole 79 in a manner that covers the end face of the sealing member 53, thereby protecting the sealing member 53 from the outside.

[0085] The insertion portion 112 is a component for inserting the transmission line 2, and is configured in a roughly cylindrical shape. The insertion portion 112 has a first opening portion 131, a second opening portion 132, and an insertion hole 133 that connects the first opening portion 131 and the second opening portion 132. The first opening portion 131 is configured to be smaller than the second opening portion 132, and the aperture of the first opening portion 131 is configured to be roughly the same as the outer diameter of the transmission line 2. Moreover, the insertion hole 133 is provided in a manner such that the inner diameter expands from the first opening portion 131 side toward the second opening portion 132 side. The transmission line 2 inserted into the kink protector 101 is clamped by the first opening portion 131, and radial torsion and bending of the transmission line 2 are unlikely to occur.

[0086] Alternatively, a cutout may be provided on the side of the insertion portion 112, extending from the end of the first opening 131 to the end of the second opening 132. In this case, the kink protector 101 can be installed radially from the transmission line 2 while being widened. Furthermore, by covering part or all of the outer circumference of the kink protector 101 with the cover member 116, the cutout of the kink protector 101 can be prevented from opening. Therefore, even after the fixing structure 1 is formed on the skin S, the kink protector 101 can be replaced from outside the body, providing excellent maintenance.

[0087] As described above, this variation prevents radial twisting or bending of the transmission wire 2, which is a long member. It should be noted that the structure of the kink protector 101 is not limited to the above-described structure; known structures can also be applied. Furthermore, the structure including the kink protector 101 is not limited to the case where the insertion member is a medical tube; the structure including the kink protector 101 can also be applied to fixed structures having flexible insertion members.

[0088] Industrial applicability

[0089] The fixing structure of the insertion member of the present invention is not limited to the above-described embodiment. For example, it can be applied to structures in which the insertion member is inserted and fixed to a substrate. For example, other examples of insertion members include flexible components such as electrical wires or control cables, and rigid components such as piping. Furthermore, the substrate is not particularly limited and can include, for example, a vehicle body or a wall. In short, the fixing structure of the insertion member of the present invention can be used to secure the insertion member in a liquid-tight or airtight manner.

[0090] Description of labels

[0091] 1Fixed structure

[0092] 2 transmission line (insertion component)

[0093] 3Fixed components

[0094] 4 Holding mechanism

[0095] 33 through holes

[0096] 34 fixed member side engaged portion

[0097] 35 internal thread

[0098] 51 chuck component

[0099] 52 threaded components

[0100] 53 sealing components

[0101] 61 first chuck member side fitting portion

[0102] 62 Second chuck member side fitting portion

[0103] 72 external thread

[0104] 91 Main Body

[0105] 92 annular protrusion

[0106] 93 Sealing member side engaged portion

[0107] S skin (object).

Claims

1. A fixing structure for an insertion member, comprising: Insertion member, inserted into the object; a fixing member fixed to the object and having an insertion hole through which the insertion member is inserted; and a holding mechanism for holding the insertion member on the fixing member, in, The fixing member has an internal thread portion at one end of the insertion hole in the axial direction, and the fixing member has a fixing member-side fitting portion in the middle of the axial direction, the cross-sectional shape of which gradually decreases in diameter from one end side toward the other end side. The holding mechanism comprises: a chuck member having a first chuck member-side fitting portion formed in accordance with the shape of the fixed member-side fitted portion, the first chuck member-side fitting portion being fitted into the fixed member-side fitted portion between the outer peripheral surface of the insertion member and the inner peripheral surface of the insertion hole to clamp the insertion member; a sealing member formed of a cylindrical elastic member and disposed on one end side in the axial direction relative to the chuck member; and The threaded member is arranged at one end side in the axial direction relative to the sealing member and has an external threaded portion that can be screwed together with the internal threaded portion, and the clamping member and the sealing member are pressed toward the other end side in the axial direction by screwing the external threaded portion and the internal threaded portion. The sealing member has: a main body portion, inserted into the insertion member; and The annular protrusion protrudes from the other end of the main body toward the other end of the axial direction, and the cross-sectional shape gradually decreases in diameter toward the protruding direction. The other axial end of the annular projection is bent and deformed radially inward of the sealing member by contacting the end surface of the one axial end of the chuck member, so that the inner diameter of the annular projection is smaller than that of the main body.

2. The fixing structure of the insertion member according to claim 1, wherein The chuck member has a second chuck member side fitting portion at an end portion on the sealing member side, wherein the second chuck member side fitting portion has a cross-sectional shape that gradually decreases in diameter from the other end side toward the one end side in the axial direction. The sealing member includes an annular sealing member-side fitted portion, which is provided radially outside the annular protrusion and has a shape conforming to the shape of the second chuck member-side fitting portion.

3. The fixing structure of the insertion member according to claim 1 or 2, wherein: The insertion member is a medical tube.

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