Shield terminal

Abstract

To provide a shield terminal capable of detecting a housing state of an inner conductor with respect to a dielectric without deteriorating workability of an outer conductor.SOLUTION: In the shield terminal 10, the inner conductor 20, the dielectric 60 and the outer conductor 40 are arranged in this order from a radially inner side toward a radially outer side. The outer conductor 40 includes a peripheral wall 41 for covering the outer peripheral surface of the dielectric 60. The peripheral wall 41 has an opening 48 penetrating in the radial direction and a contact portion 47 defined by the opening 48. The dielectric 60 has a cavity 61 along the axial direction and a hole 68 radially extending from the outer peripheral surface of the dielectric 60 to the cavity 61. The hole 68 and the opening 48 have through-passages A penetrating in the radial direction at the same position in each of the axial direction and the circumferential direction. A tip part of the inner conductor 20 in the axial direction faces the through passage A of the hole 68 while being accommodated in the cavity 61.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a shield terminal. [Background technology]

[0002] Patent Document 1 describes a shielded terminal as a connection device including an inner terminal (hereinafter referred to as the inner conductor), an outer terminal (hereinafter referred to as the outer conductor), and a dielectric positioned between the inner conductor and the outer conductor. The inner conductor is housed in the dielectric. The outer conductor surrounds the dielectric. Figure 13 of Patent Document 1 shows a structure in which a vertical hole is formed at the tip of the dielectric and a rectangular hole is formed at the tip of the outer conductor, allowing the inner conductor to be seen through the rectangular hole and the vertical hole from outside the outer conductor. This type of shielded terminal is also described in Patent Document 2. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-22144 [Patent Document 2] International Publication No. 2023 / 072579 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of Patent Document 1, it was possible to detect whether the inner conductor was housed in the dielectric in the correct position by visually checking the inner conductor through the vertical hole and the rectangular hole. However, a special process was required to drill the rectangular hole in the outer conductor, and there was room for improvement in terms of the workability of the outer conductor.

[0005] Therefore, an object of the present disclosure is to provide a shield terminal that can detect the accommodation state of an inner conductor relative to a dielectric without reducing the workability of the outer conductor. [Means for solving the problem]

[0006] The shield terminal of the present disclosure comprises an inner conductor extending in the axial direction, a dielectric surrounding the inner conductor, and an outer conductor surrounding the dielectric, and is a shield terminal in which the inner conductor, the dielectric, and the outer conductor are arranged in this order from the inside to the outside in a radial direction perpendicular to the axial direction, wherein the dielectric has a cavity arranged along the axial direction, the inner conductor is accommodated in the cavity, the outer conductor has a peripheral wall covering the outer surface of the dielectric along the circumferential direction, the peripheral wall has an opening that penetrates the peripheral wall in the radial direction and a contact portion defined by the opening, the dielectric has a hole portion extending in the radial direction from the outer surface of the dielectric to the cavity, the hole portion and the opening have through passages that penetrate in the radial direction at the same positions in each of the axial direction and the circumferential direction, and the axial tip portion of the inner conductor faces the through passage of the hole when accommodated in the cavity. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a shield terminal that can detect the accommodation state of the inner conductor in the dielectric without reducing the workability of the outer conductor. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a shield terminal connected to an end portion of a shielded electric wire, as viewed obliquely from below and behind, in the first embodiment. [Figure 2] FIG. 2 is an enlarged perspective view of a portion including the cut surface of the front end portion of the shield terminal cut at positions corresponding to the hole and the opening, as viewed obliquely from the front downward in the first embodiment. [Figure 3] FIG. 3 is an enlarged side view of the front end portion of the shield terminal in the first embodiment. [Figure 4] FIG. 4 is a perspective view of the shield terminal in the first embodiment, in which the inner conductor of the shield terminal is connected to the core wire of the shielded electric wire and the braided wire is folded back, as viewed from diagonally above and in front. [Figure 5]FIG. 5 is an enlarged side view of the front end portion of the dielectric body that houses the inner conductor of the shield terminal in the first embodiment. [Figure 6] FIG. 6 is an enlarged cross-sectional plan view of the front end portion of the shield terminal in the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The shield terminal of the present disclosure comprises: (1) A shielded terminal comprising an inner conductor extending in an axial direction, a dielectric surrounding the inner conductor, and an outer conductor surrounding the dielectric, in which the inner conductor, the dielectric, and the outer conductor are arranged in this order from the inside to the outside in a radial direction perpendicular to the axial direction, wherein the dielectric has a cavity arranged along the axial direction, the inner conductor is accommodated in the cavity, the outer conductor has a peripheral wall covering the outer surface of the dielectric along the circumferential direction, the peripheral wall has an opening penetrating the peripheral wall in the radial direction and a contact portion defined by the opening, the dielectric has a hole portion extending in the radial direction from the outer surface of the dielectric to the cavity, the hole portion and the opening have through passages penetrating in the radial direction at the same positions in each of the axial direction and the circumferential direction, and the axial tip end of the inner conductor faces the through passage of the hole when accommodated in the cavity. According to the above configuration (1), the accommodation state of the inner conductor relative to the dielectric can be detected from outside the outer conductor through the through-path. In particular, since the axial tip of the inner conductor can be seen, the risk of misidentification is reduced compared to when the axial middle of the inner conductor is seen. Moreover, the opening is formed in the peripheral wall of the outer conductor together with the contact portion. Therefore, there is no need to drill a separate opening in the outer conductor to detect the accommodation state of the inner conductor, which prevents a decrease in the workability of the outer conductor.

[0010] (2) In the shield terminal described in (1) above, it is preferable that the contact portion has a shape that extends from the base end to the tip end on a part of the peripheral wall, the tip end of the contact portion faces the opening edge portion of the hole portion on the outer peripheral surface of the dielectric, and the opening edge portion has a slope portion that slopes radially inward as it moves from the base end of the contact portion to the tip end. According to the above configuration (2), the tip of the contact portion can be moved toward the sloped portion, which makes it possible to accommodate small shield terminals with small outer conductor diameters. Furthermore, by having the tip of the contact portion come into contact with the sloped portion, further elastic deformation of the contact portion can be suppressed.

[0011] (3) In the shield terminal described in (2) above, the contact portion has a contact point located between the base end and the tip end, and an inclined portion that slopes radially inward from the contact point to the tip end, and the inclined portion has a shape that slopes along the inclined portion. According to the above configuration (3), the inclined portion can contact along the inclined surface, so that the contact portion and the dielectric are less likely to be damaged, and the shield terminal can be made smaller in size in the radial direction.

[0012] (4) In the shield terminal described in any one of (1) to (3) above, it is preferable that the inner conductor has a tip expansion portion at the tip portion that expands radially outward, the dielectric has a corner portion at the position where the cavity and the hole portion intersect, and the tip expansion portion protrudes from the corner portion toward the hole portion. According to the above configuration (4), when checking the accommodation state of the inner conductor in the dielectric, the tip flared portion protruding toward the hole can be seen, resulting in excellent visibility.

[0013] (5) In the shield terminal described in any one of (1) to (4) above, it is preferable that the inner conductor has a locking portion, the dielectric has a locking hole in which the locking portion can be locked, the locking hole has a shape extending in the radial direction from the outer peripheral surface of the dielectric to the cavity, and the locking hole and the hole portion are arranged side by side with a gap in the axial direction. According to the above configuration (5), the hole and the locking hole can be simultaneously removed from the mold during molding, which makes it possible to avoid the structure of the molding die becoming complicated.

[0014] (6) In the shield terminal according to any one of (1) to (5) above, it is preferable that the hole portion penetrates the dielectric in the radial direction via the cavity. According to the above configuration (6), the accommodation state of the inner conductor in the dielectric can be confirmed from either of the opening sides at both ends in the radial direction of the hole.

[0015] [Details of the embodiments of the present disclosure] Specific examples of the present disclosure will be described below with reference to the drawings. However, the present invention is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0016] <Embodiment 1> As shown in FIG. 6 , the shield terminal 10 of the first embodiment includes an inner conductor 20, an outer conductor 40, and a dielectric 60. As shown in FIG. 1 , the shield terminal 10 is connected to the end of a shielded electric wire 90. The inner conductor 20 and the outer conductor 40 are conductive and formed by pressing metal plates. The dielectric 60 is made of an insulating material such as synthetic resin. In the following description, the front-rear direction is defined as the left side of each drawing, which corresponds to the tip end of the shielded electric wire 90. The front-rear direction is synonymous with the axial direction. The direction perpendicular to the axial direction corresponds to the radial direction of the shielded electric wire 90. The radially inward direction is the direction toward the center (axial center) of the shielded terminal 10. The radially outward direction is the direction away from the center of the shielded terminal 10. In each of the inner conductor 20, the outer conductor 40, and the dielectric 60, the surface facing inward in the radial direction corresponds to the inner peripheral surface, and the surface facing outward in the radial direction corresponds to the outer peripheral surface. The circumferential direction is the direction along the inner circumferential surface and the outer circumferential surface. Arrows X, Y, and Z in Fig. 6 represent the axial direction, the radial direction, and the circumferential direction, respectively. The up-down direction and the left-right direction in each figure are radial directions, but are sometimes referred to as the up-down direction and the left-right direction, respectively.

[0017] (Shielded wire 90) As shown in FIG. 4 , the shielded electric wire 90 is a so-called coaxial electric wire, and is formed by laminating a core wire 91, an insulating coating 92, shielding members 93 and 94, and a sheath 95 in this order from the inside to the outside in the radial direction. The shielding members 93 and 94 form a shielding layer that shields against electromagnetic waves. In the first embodiment, the shielding members 93 and 94 are composed of a metal foil 93 and a braided wire 94. The metal foil 93 is copper foil or aluminum foil wound around the outer periphery of the insulating coating 92. The braided wire 94 is a conductor formed by weaving metal wires such as copper wires or aluminum wires into a net shape, and is disposed on the outer periphery of the metal foil 93. The sheath 95 covers the outer periphery of the shielding members 93 and 94.

[0018] At the terminal portion (front end portion) of the shielded wire 90, the sheath 95 and the insulating coating 92 are stripped and removed, thereby exposing the core wire 91 and the shield members 93 and 94. The exposed braided wire 94 is folded back onto the outer periphery of the sleeve (the member located inside the reference numeral 94 in FIG. 4).

[0019] (Inner conductor 20) 4, the inner conductor 20 has an elongated shape extending in the front-rear direction as a whole. The inner conductor 20 has a cylindrical tube portion 21 and a barrel-shaped barrel portion 22 continuing to the rear of the tube portion 21. The barrel portion 22 is crimped to the front end of the core wire 91 and is electrically and mechanically connected to it.

[0020] A stopper portion 23 is formed at the rear end of the cylindrical portion 21. The stopper portion 23 is formed by two plate pieces that rise from the mating ends of the cylindrical portion 21 and are stacked on top of each other on the left and right. The stopper portion 23 is stopped by a stopper receiving portion (not shown) of the dielectric 60 from behind.

[0021] A pair of left and right locking portions 24 protrude from the tubular portion 21. Each locking portion 24 is formed by cutting and bending a portion of the tubular portion 21 radially outward. Each locking portion 24 extends cantilever-like from the front end portion, which is the base end of the bent portion, rearward and radially outward, and is elastically deformable in the radial direction with the front end portion as a fulcrum. As shown in Figures 5 and 6, the locking portion 24 is engaged with the inner surface of a locking hole 67 (described later) of the outer conductor 40.

[0022] As shown in FIG. 2 , a pair of upper and lower notches 25 are formed at the front end of the tubular portion 21. As shown in FIG. 4 , the notches 25 extend in the front-rear direction and are open to the front of the tubular portion 21. A pair of left and right mating connection portions 26 are formed between the notches 25 at the front end of the tubular portion 21. Each mating connection portion 26 is plate-shaped with its plate surface facing left and right (radially) and is arranged opposite each other in the left and right direction. A tip expansion portion 27 that expands outward to the left and right (radially outward) is formed at the front end of the tip side of each mating connection portion 26. Each mating connection portion 26 is elastically deformable in the radial direction, with the portion between the inner ends of each notch 25 serving as a fulcrum. A mating inner conductor (not shown) is inserted into the tubular portion 21 from the front by being guided into the tip expansion portion 27. The mating inner conductor inserted into the tubular portion 21 comes into contact with each mating connection portion 26 and is electrically connected.

[0023] (Outer conductor 40) As shown in Fig. 1, the outer conductor 40 is cylindrical and has a front peripheral wall 41 and a rear peripheral wall 42 that are connected to each other. Both the front and rear peripheral walls 41, 42 are cylindrical and open with their axes facing the front-to-rear direction. As shown in Fig. 6, the front peripheral wall 41 has a small diameter portion 43, a large diameter portion 44 with an outer diameter larger than that of the small diameter portion 43, and an expanded diameter portion 45 located between the small diameter portion 43 and the large diameter portion 44.

[0024] The small diameter portion 43 is disposed on the front end side of the peripheral wall 41. As shown in Fig. 1, the small diameter portion 43 has a pair of bosses 46 and a plurality of contact portions 47. Each boss 46 and each contact portion 47 comes into contact with a mating outer conductor (not shown) fitted to the peripheral wall 41 from the inside in the radial direction, and functions as a contact portion that electrically connects the outer conductor 40 to the mating outer conductor.

[0025] The embossed portions 46 are embossed and are arranged at intervals in the circumferential direction on the upper end of the small diameter portion 43. The embossed portions 46 are fixed contact portions that do not move relative to the small diameter portion 43.

[0026] As shown in FIG. 2, four contact portions 47 are arranged at intervals in the circumferential direction within the range (lower side) of the major arc of the small diameter portion 43, excluding the upper end portion. Each contact portion 47 is a movable contact point that is elastically deformable in the radial direction relative to the small diameter portion 43. As shown in FIG. 3, each contact portion 47 is formed by cutting out a portion of the small diameter portion 43 (peripheral wall). Each contact portion 47 extends in a cantilevered manner from the base end 38 to a tip end 39 located forward of the base end 38 in a portion of the small diameter portion 43. An opening 48 is formed in a portion of the small diameter portion 43 by cutting out each contact portion 47. The opening 48 is a cutout space formed along the outer edge of each contact portion 47 in a portion of the small diameter portion 43. In other words, the opening 48 defines the outer edge of the contact portion 47. More specifically, the opening 48 is formed by a front space 49 adjacent to the tip 39 of each contact portion 47 and side spaces 51 adjacent to both circumferential ends of each contact portion 47 .

[0027] A contact point 52 capable of contacting a mating outer conductor is formed at the front end (portion near the tip 39) of each contact portion 47 at a position protruding radially outward from other portions of the small-diameter portion 43. As shown in FIG. 6, a sloped portion 53 that slopes radially inward from the contact point 52 to the tip 39 is formed at the front end of each contact portion 47. As shown in FIG. 3, the opening width of the front space 49 in the front-to-rear direction is wider than the opening width of the side space 51 in the circumferential direction due to the recessed shape of the sloped portion 53. Also, as shown in FIG. 1, a flat truncated reinforcing portion 54 is formed in the small-diameter portion 43 at a position overlapping the rear end of each contact portion 47. The reinforcing portion 54 reinforces the portion of each contact portion 47 near the base end 38, which serves as a fulcrum for elastic deformation of the contact portion 47.

[0028] As shown in FIG. 6, the expanded diameter portion 45 is continuous with the rear end of the small diameter portion 43 and projects radially outward in a flange-like manner. The large diameter portion 44 is cylindrical and extends rearward from the outer circumferential end of the expanded diameter portion 45, and is disposed on the rear end side of the peripheral wall 41. As shown in FIG. 1, a rotation suppressing portion 55 is formed on the lower end side of the rear end of the large diameter portion 44. The rotation suppressing portion 55 is flat with its plate surface facing the circumferential direction, and is formed by cutting out and raising a portion of the rear end of the large diameter portion 44. The rotation suppressing portion 55 is fitted into a groove in a housing (not shown). The outer conductor 40 is accommodated in a state where its rotation relative to the housing is suppressed by the rotation suppressing portion 55.

[0029] As shown in FIG. 1 , the rear peripheral wall 42 has a tubular connecting portion 56, a tubular main body portion 57 located rearward of the tubular connecting portion 56, and a constricted portion 58 located between the tubular main body portion 57 and the tubular connecting portion 56. The tubular connecting portion 56 and the tubular main body portion 57 are cylindrical, and the constricted portion 58 has a constricted shape with a diameter reduced from the tubular connecting portion 56 and the tubular main body portion 57. The tubular main body portion 57 is fixed to the braided wire 94 of the shielded electric wire 90 from the radially outer side. The outer conductor 40 is electrically and mechanically connected to the braided wire 94 by the tubular main body portion 57. The constricted portion 58 is arranged so as to be in contact with the metal foil 93 (see FIG. 4 ) of the shielded electric wire 90. The tubular connecting portion 56 is coaxially fitted inside the large diameter portion 44. 6, the outer peripheral surface of the cylindrical connecting portion 56 is disposed so as to be in contact with the inner peripheral surface of the large diameter portion 44. The cylindrical connecting portion 56 and the large diameter portion 44 are electrically connected to each other by a connecting means such as spot welding.

[0030] (Dielectric 60) As shown in FIG. 6, the dielectric 60 is composed of integral accommodating sections 62, 63 having a cavity 61 for accommodating the inner conductor 20. The accommodating sections 62, 63 have a front accommodating section 62 located in the front and a rear accommodating section 62 located in the rear. As shown in FIG. 5, the front accommodating section 62 has a smaller outer diameter than the rear accommodating section 63. The front end of the rear accommodating section 63 forms a stepped surface 64 along the radial direction. The radially inner, reduced-diameter end of the stepped surface 64 is continuous with the rear end of the front accommodating section 62.

[0031] 6, the front accommodating portion 62 is accommodated inside the small diameter portion 43 of the outer conductor 40. The rear accommodating portion 63 is accommodated inside the large diameter portion 44 of the outer conductor 40. The stepped surface 64 of the accommodating portion 63 is arranged so as to be able to contact the expanded diameter portion 45 from behind. The contact of the stepped surface 64 with the expanded diameter portion 45 prevents the dielectric 60 from slipping out of the outer conductor 40 in the forward direction.

[0032] A stepped recess 65 is formed on the outer peripheral surface of the rear accommodating portion 63. The stepped recess 65 is shaped by cutting out the entire rear end of the accommodating portion 63 and is open rearward. The tubular connecting portion 56 is fitted into the stepped recess 65 of the accommodating portion 63 from the rear. The front end of the tubular connecting portion 56 is positioned so as to be able to come into contact with the inner end (the surface facing rearward) of the stepped recess 65 from the rear. The dielectric 60 is inserted into the front tubular portion 21 from the rear, and the tubular connecting portion 56 is connected to the large diameter portion 44, thereby preventing the dielectric 60 from slipping out rearward from the outer conductor 40.

[0033] As shown in Fig. 6, the cavity 61 passes coaxially through the radial centers of the front and rear housing portions 62, 63 in the front-rear direction and is open to the front and rear. In the rear housing portion 63, the cavity 61 gradually narrows in diameter from its rear end portion, which opens with a large diameter, toward the front, and in the front housing portion 62, it extends with the same diameter in the front-rear direction. A guide portion 66 is formed at the front end of the cavity 61, the diameter of which increases toward the front surface of the housing portion 62. A mating inner conductor (not shown) is guided into the cavity 61 by the guide portion 66.

[0034] As shown in Fig. 6, the dielectric 60 has locking holes 67 at the rear end of the accommodating portion 62, which extend radially on both radial sides of the cavity 61. The locking holes 67 are rectangular openings that are long in the front-rear direction and open at both radial ends of the outer peripheral surface of the rear end of the accommodating portion 62. The locking holes 67 communicate with the cavity 61 on their radially inner side. That is, the locking holes 67 extend radially from the outer peripheral surface of the accommodating portion 62 of the dielectric 60 to the cavity 61. The extension direction of the cavity 61 (front-rear direction) and the extension direction of the locking holes 67 (radial direction, left-right direction) are perpendicular to each other.

[0035] The inner conductor 20 is inserted into the cavity 61 from the rear. During the process of inserting the inner conductor 20 into the cavity 61, the locking portion 24 slides on the inner circumferential surface of the cavity 61 and elastically deforms radially inward. When the inner conductor 20 is inserted into the cavity 61 to the correct position, the locking portion 24 elastically returns to its original position and fits into the locking hole 67 from the radially inner side. As shown in FIG. 6 , the rear end of the locking portion 24 is positioned so as to be able to come into contact with the rear surface of the locking hole 67 (the surface facing forward at the rear side of the locking hole 67) from the front. This prevents the inner conductor 20 from slipping out rearward from the dielectric 60. Furthermore, the stopper portion 23 of the inner conductor 20 abuts against a stopper receiving portion (not shown) formed on the inner circumferential surface of the cavity 61, thereby preventing the inner conductor 20 from slipping out forward from the dielectric 60.

[0036] As shown in FIG. 6 , the dielectric 60 has holes 68 extending radially on both radial sides of the cavity 61 at the front end of the accommodating portion 62. The holes 68 open at both radial ends of the outer peripheral surface of the front end of the accommodating portion 62 and communicate with the cavity 61 on the radially inner side. That is, like the locking hole 67, the holes 68 extend radially from the outer peripheral surface of the accommodating portion 62 of the dielectric 60 to the cavity 61. The extension direction of the cavity 61 (front-rear direction) and the extension direction of the holes 68 (radial direction, left-right direction) are mutually orthogonal. The holes 68 and the locking hole 67 extend parallel to each other in the same direction. The holes 68 and the locking hole 67 are open on the outer peripheral surface of the accommodating portion 62, side by side and spaced apart on the same axis in the front-rear direction.

[0037] As shown in FIG. 5, a sloped surface 69 gradually receding radially outward is formed on the opening edge of the rear end of the hole 68 on the outer peripheral surface of the accommodating portion 62. The sloped surface 69 extends from an adjacent portion on the outer peripheral surface of the accommodating portion 62, sloping obliquely downward with respect to the front-rear direction (the direction along the outer peripheral surface of the dielectric 60). As shown in FIG. 2, the sloped surface 69 is continuous in the circumferential direction on the outer peripheral surface of the accommodating portion 62 except for the upper end portion, and is formed in a range of a major arc beyond the opening edge of the hole 68. As shown in FIGS. 2, 3, and 6, the sloped portion 53 of each contact portion 47 of the outer conductor 40 is inclined radially inward and arranged opposite the sloped surface 69 so as to be able to come into contact with the sloped surface 69. As a result, the sloped surface 53 of each contact portion 47 is deflected toward the sloped surface 69 and is prevented from excessive elastic deformation radially inward due to contact with the sloped surface 69. As shown in FIG. 5, an opposing inclined surface 71 that slopes diagonally downward is formed on the lower end side of the opening edge of the front end of the hole 68 on the outer peripheral surface of the storage section 62, opposite the lower end side of the inclined surface 69.

[0038] (Function of shield terminal 10) 2, 3 and 6, in a state where the dielectric 60 is inserted inside the peripheral wall 41 of the outer conductor 40, the inclined portion 53 of each contact portion 47 faces the inclined surface portion 69 so as to be able to come into contact with it, and the hole portion 68 is disposed so as to communicate with the front space 49 of the opening 48. Here, as shown in Fig. 2 and 6, the front space 49 of the opening 48 and the hole portion 68 form a through passage A that penetrates them radially at the same position (overlapping position) in each of the front-rear direction (axial direction) and the circumferential direction. In this case, when the inner conductor 20 is inserted to the normal depth into the cavity 61 of the dielectric 60, the locking portion 24 is positioned so as to be able to lock onto the inner surface of the locking hole 67, as described above, and the inner conductor 20 is prevented from slipping out of the cavity 61. Furthermore, when the inner conductor 20 is inserted to the normal depth into the cavity 61 of the dielectric 60, the flared tip portion 27 of the mating connection portion 26 of the inner conductor 20 is positioned inside the hole 68. In other words, the flared tip portion 27 of the inner conductor 20 faces the through path A of the hole 68. Therefore, the outer surface of the flared tip portion 27 of the inner conductor 20 (the plate surface of the mating connection portion 26 at the tip of the inner conductor 20) can be seen from outside the outer conductor 40 through the front space 49 of the opening 48 and the through path A of each of the hole 68. In other words, by visually observing the tip expansion portion 27 of the inner conductor 20 from outside the outer conductor 40 through the through passage A, it is possible to detect (confirm) that the inner conductor 20 has been inserted to the correct depth into the cavity 61 of the dielectric 60.

[0039] In contrast, when the inner conductor 20 remains in a partially inserted position, i.e., not fully inserted into the cavity 61 of the dielectric 60, the locking portion 24 contacts the inner circumferential surface of the cavity 61 and maintains an elastically deformed state. If the locking portion 24 is not locked in the locking hole 67, the inner conductor 20 is allowed to slip out of the cavity 61. However, in the case of the first embodiment, when the inner conductor 20 is in a partially inserted position relative to the dielectric 60, the tip of the inner conductor 20 does not reach the position of the hole 68, and the inner conductor 20 cannot be seen from outside the outer conductor 40 through the front space 49 of the opening 48 and the through-paths A of the hole 68. Therefore, the fact that the inner conductor 20 cannot be seen from outside the outer conductor 40 can be detected as being partially inserted relative to the dielectric 60. When the inner conductor 20 cannot be seen, the inner conductor 20 is pushed into the cavity 61 to the correct position. This makes the tip of the inner conductor 20 visible through the hole 68 and prevents the inner conductor 20 from slipping out of the cavity 61 .

[0040] In addition, in the case of the first embodiment, the tip expansion portion 27 receives a reaction force when the mating connecting portion 26 elastically returns, and slides along a corner 72 (see FIG. 6) formed at the intersection of the cavity 61 and the hole 68, and then can enter the hole 68. This makes it possible to prevent the inner conductor 20 from remaining in a partially inserted position relative to the dielectric 60. Furthermore, the insertion state of the inner conductor 20 relative to the dielectric 60 can be detected through the through path A from the openings on either the left or right side of the outer conductor 40 (both the top and bottom sides in FIG. 6).

[0041] As described above, the shield terminal 10 of the first embodiment includes the inner conductor 20 extending in the front-rear direction (axial direction), the dielectric 60 surrounding the inner conductor 20, and the outer conductor 40 surrounding the dielectric 60. The inner conductor 20, the dielectric 60, and the outer conductor 40 are arranged in this order from the inside to the outside in a radial direction perpendicular to the front-rear direction. The dielectric 60 has a cavity 61 arranged along the front-rear direction. The inner conductor 20 is housed in the cavity 61. The outer conductor 40 has a peripheral wall 41 that covers the outer peripheral surface of the dielectric 60 along the circumferential direction. The peripheral wall 41 has an opening 48 that penetrates the peripheral wall 41 in the radial direction and a contact portion 47 defined by the opening 48. The dielectric 60 further has a hole 68 that extends radially from the outer peripheral surface of the dielectric 60 to the cavity 61. The hole 68 and the opening 48 have through-paths A that penetrate radially at the same positions in the front-rear direction and the circumferential direction, respectively. The front end (the tip in the axial direction) of the inner conductor 20 faces the through passage A of the hole 68 when housed in the cavity 61 .

[0042] According to the above configuration, the accommodation state of the inner conductor 20 relative to the dielectric 60 can be detected from outside the outer conductor 40 through the through path A. In particular, since the tip of the inner conductor 20 can be seen, there is less risk of misidentification compared to when the middle part of the inner conductor 20 is seen. Moreover, the contact portion 47 is formed together with the opening 48 in the peripheral wall 41 of the outer conductor 40. Therefore, there is no need to separately drill the opening 48 in the outer conductor 40 in order to detect the accommodation state of the inner conductor 20, and this prevents a decrease in the workability of the outer conductor 40.

[0043] Furthermore, in the case of the shield terminal 10 of the first embodiment, the contact portion 47 has a shape that extends from the base end 38 to the tip 39 on a part of the peripheral wall 41. The tip 39 of the contact portion 47 faces the opening edge of a hole 68 in the outer peripheral surface of the dielectric 60. The opening edge of the hole 68 has a slope 69 that slopes radially inward from the base end 38 to the tip 39 of the contact portion 47. This allows the tip 39 of the contact portion 47 to escape toward the slope 69, making it possible to accommodate a small shield terminal 10 with a small diameter of the outer conductor 40. Furthermore, contact of the tip 39 of the contact portion 47 with the slope 69 prevents excessive deflection of the contact portion 47.

[0044] Furthermore, the contact portion 47 has a contact point 52 located between the base end 38 and the tip end 39, and an inclined portion 53 that slopes radially inward from the contact point 52 to the tip end 39. The inclined surface 69 is shaped to slope along the inclined surface 53. This allows the inclined surface 53 to come into contact along the inclined surface 69, making it less likely that the contact portion 47 and the dielectric 60 will be damaged. In addition, the shield terminal 10 can be made smaller in size in the radial direction.

[0045] Furthermore, in the case of the shield terminal 10 of the first embodiment, the inner conductor 20 has a tip flared portion 27 at its front-rear tip that flares outward in the radial direction. The dielectric 60 has a corner 72 at the position where the cavity 61 and the hole 68 intersect. The tip flared portion 27 protrudes from the corner 72 toward the hole 68. This provides excellent visibility because the accommodation state of the inner conductor 20 in the dielectric 60 can be confirmed by simply looking at the tip flared portion 27 protruding toward the hole 68.

[0046] Furthermore, in the case of the shield terminal 10 of the first embodiment, the inner conductor 20 has a locking portion 24. The dielectric 60 has a locking hole 67 in which the locking portion 24 can be locked. The locking hole 67 has a shape that extends radially from the outer peripheral surface of the dielectric 60 to the cavity 61. The locking hole 67 and the hole portion 68 are arranged side by side with a gap in the front-to-rear direction. This allows the hole portion 68 and the locking hole 67 to be removed simultaneously during molding, thereby avoiding a complex mold structure.

[0047] Furthermore, in the case of the shield terminal 10 of the first embodiment, the hole portion 68 penetrates the dielectric 60 in the radial direction via the cavity 61. This allows the accommodation state of the inner conductor 20 in the dielectric 60 to be detected from either of the opening sides at both ends in the radial direction, thereby increasing the reliability of detection.

[0048] [Another embodiment of the present disclosure] The first embodiment disclosed herein should be considered to be illustrative in all respects and not restrictive. In the first embodiment, one inner conductor is accommodated in the dielectric. In contrast, in other embodiments, two or more inner conductors may be accommodated in the dielectric. For example, when two inner conductors are accommodated in the dielectric, unlike the first embodiment, the inner conductor, dielectric, and outer conductor do not have to be formed concentrically. In the case of the first embodiment, no particular mark for detection was provided on the tip (expanded tip) of the inner conductor, which is the visual target during detection. In contrast, according to other embodiments, a mark for detection may be formed on the visual target portion, such as the tip of the inner conductor, and may be colored, for example, in a specific, identifiable color. [Explanation of symbols]

[0049] A... Passageway 10...Shield terminal 20...Inner conductor 21...Cylinder part 22...Barrel section 23...Stopper part 24...Latching part 25...Notch 26...Mating connection part 27...Tip expansion part 38...Proximal end 39...Tip 40...Outer conductor 41...Front peripheral wall (perimeter wall) 42...Rear wall 43…Small diameter part 44...Large diameter section 45...Expanded diameter part 46...Embossed section 47...Contact part 48...Opening 49...Front space 51...Side space 52...Contact point 53…Slope part 54...Reinforcement 55...Rotation suppression section 56...Cylindrical joint 57...Cylindrical main body 58...Constricted part 60...Dielectric 61...cavity 62...Front storage section (storage section) 63... Rear storage compartment (storage compartment) 64…Step surface 65...Stepped recess 66...Invitation Section 67...Latching hole 68...hole 69...Sloped section 71...Opposite slope 72...Corner 90...Shielded wire 91...Core wire 92...Insulating coating 93...Metal foil (shielding material) 94...Braided wire (shield material) 95...Sheath

Claims

1. The coil comprises an inner conductor extending in an axial direction, a dielectric surrounding the inner conductor, and an outer conductor surrounding the dielectric, a shield terminal in which the inner conductor, the dielectric, and the outer conductor are arranged in this order from the inside to the outside in a radial direction perpendicular to the axial direction, the dielectric body has a cavity arranged along the axial direction, The inner conductor is housed in the cavity, the outer conductor has a peripheral wall that covers the outer peripheral surface of the dielectric in a circumferential direction, The peripheral wall has an opening that penetrates the peripheral wall in the radial direction and a contact portion defined by the opening, the dielectric body has a hole portion extending in the radial direction from an outer circumferential surface of the dielectric body to the cavity, the hole portion and the opening portion have through-paths that penetrate in the radial direction at the same positions in the axial direction and the circumferential direction, respectively; A shield terminal in which the axial tip of the inner conductor faces the through passage of the hole when housed in the cavity.

2. the contact portion has a shape extending from a base end to a tip end on a part of the peripheral wall, the tip of the contact portion faces an opening edge of the hole in the outer peripheral surface of the dielectric, 2. The shield terminal according to claim 1, wherein the opening edge has a slope that slopes inward in the radial direction from the base end of the contact portion toward the tip end.

3. the contact portion has a contact point located between the base end and the tip end, and an inclined portion inclined radially inward from the contact point to the tip end, The shield terminal according to claim 2 , wherein the inclined surface portion is inclined along the inclined portion.

4. the inner conductor has a tip end flared portion at the tip end that flares outward in the radial direction, the dielectric has a corner at a position where the cavity and the hole intersect, The shield terminal according to claim 1 , wherein the tip flared portion protrudes from the corner portion toward the hole portion.

5. The inner conductor has a locking portion, the dielectric body has a locking hole in which the locking portion can be locked, the locking hole has a shape extending in the radial direction from the outer circumferential surface of the dielectric body to the cavity, 2. The shield terminal according to claim 1, wherein the locking hole and the hole portion are arranged side by side with a gap in the axial direction.

6. The shield terminal according to claim 1 , wherein the hole penetrates the dielectric in the radial direction via the cavity.

Images