Coaxial cable connector and coaxial cable with connector

Abstract

To provide a connector for a coaxial cable and a coaxial cable with a connector capable of suppressing loosening of screwing of a first inner conductor and a second inner conductor with time.SOLUTION: The coaxial cable connector 1 is attached to a tip end portion of a coaxial cable 100 having an inner conductor wire 101. The coaxial cable connector 1 includes a first inner conductor 4 electrically connected to the inner conductor wire 101, a second inner conductor 5 screwed to the first inner conductor 4 in the axial direction X, and a pressing mechanism 6 that presses the first inner conductor 4 or the second inner conductor 5 in the axial direction X.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a coaxial cable connector and a coaxial cable with a connector. [Background technology]

[0002] Patent document 1 discloses a coaxial cable connector having a first inner conductor electrically connected to the inner conductor wire of the coaxial cable, and a second inner conductor screwed axially into the first inner conductor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-301735 Summary of the Invention [Problem to be solved by the invention]

[0004] In the coaxial cable connector described in Patent Document 1, the screw engagement between the first inner conductor and the second inner conductor may loosen over time.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a coaxial cable connector and a coaxial cable with a connector that can prevent the screw engagement between the first inner conductor and the second inner conductor from loosening over time. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides a coaxial cable connector that is attached to the tip of a coaxial cable having an inner conductor wire, and that includes: a first inner conductor electrically connected to the inner conductor wire; a second inner conductor axially screwed into the first inner conductor; and a pressing mechanism that axially presses the first inner conductor or the second inner conductor.

[0007] In addition, to achieve the above-mentioned object, the present invention provides a coaxial cable with a connector, comprising: a coaxial cable having an inner conductor wire; and a coaxial cable connector attached to the tip of the coaxial cable, wherein the coaxial cable connector has a first inner conductor electrically connected to the inner conductor wire, a second inner conductor axially screwed into the first inner conductor, and a pressing mechanism axially pressing the first inner conductor or the second inner conductor. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a coaxial cable connector and a coaxial cable with a connector that can prevent the screw engagement between the first inner conductor and the second inner conductor from loosening over time. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a state in which a connector-attached coaxial cable and a mating connector are assembled together in the first embodiment. [Figure 2] 1 is a cross-sectional view of a connector-attached coaxial cable according to a first embodiment. [Figure 3] FIG. 3 is an exploded half cross-sectional view of an internal unit in the first embodiment. [Figure 4] 3 is a view of the contact member and the cap nut according to the first embodiment, as viewed from the base end side. FIG. [Figure 5] FIG. 2 is an exploded cross-sectional view of a first assembly, a second assembly, and a sealing member in the first embodiment. [Figure 6] FIG. 3 is a cross-sectional view showing a state in which a first assembly and a second assembly are temporarily assembled in the first embodiment. [Figure 7] FIG. 3 is a cross-sectional view showing a state in which a first outer conductor and a second outer conductor are fastened together in the first embodiment. [Figure 8] 4 is a cross-sectional view showing a state in which the male threaded portion has been completely threaded into the female threaded hole of the cap nut in the first embodiment. FIG. [Figure 9]FIG. 10 is a half cross-sectional view of an internal unit according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] [First embodiment] A first embodiment of the present invention will be described with reference to Figures 1 to 8. The embodiment described below is shown as a preferred specific example for carrying out the present invention, and although various technically preferable technical matters are specifically exemplified, the technical scope of the present invention is not limited to this specific embodiment.

[0011] Fig. 1 is a cross-sectional view showing a state in which a connectorized coaxial cable 10 is assembled with a mating connector 19. Fig. 2 is a cross-sectional view of the connectorized coaxial cable 10.

[0012] The connector-equipped coaxial cable 10 of this embodiment includes a coaxial cable 100 and a coaxial cable connector 1 (hereinafter simply referred to as "connector 1") attached to the tip of the coaxial cable 100. A direction parallel to the central axis C of the coaxial cable 100 and the connector 1 is referred to as the axial direction X. One side of the axial direction X, on which the connector 1 is attached in the coaxial cable 100 (for example, the right side in FIGS. 1 and 2), is referred to as the tip side X1, and the opposite side (for example, the left side in FIGS. 1 and 2) is referred to as the base side X2.

[0013] As an example, the base end of the coaxial cable 100 is connected to an antenna for public broadcasting. A mating connector 19 is connected to the tip end X1 of the connector 1. The mating connector 19 is, for example, a connector on the transmitter side or a relay connector for the coaxial cable.

[0014] The coaxial cable 100 has an inner conductor wire 101, an insulating member 102 arranged on the outer periphery of the inner conductor wire 101, an outer conductor wire 103 arranged on the outer periphery of the insulating member 102, and a sheath 104 arranged on the outer periphery of the outer conductor wire 103.

[0015] The inner conductor wire 101 is a hollow tubular member formed in the longitudinal direction of the coaxial cable 100 and is made of a metal such as copper. In this embodiment, the inner conductor wire 101 is a helical tube with helical irregularities. The inner circumferential surface of the inner conductor wire 101 is referred to as the inner circumferential irregularity 101a. Note that the inner conductor wire 101 may be configured such that the outer circumferential surface is formed in a cylindrical shape without irregularities and the inner circumferential irregularity 101a is formed on the inner circumferential surface.

[0016] The insulating member 102 is interposed between the inner conductor wire 101 and the outer conductor wire 103, and ensures electrical insulation between the inner conductor wire 101 and the outer conductor wire 103. In this embodiment, the insulating member 102 is formed in a spiral shape. The insulating member 102 is made of an electrically insulating material such as a fluororesin or polyethylene resin.

[0017] The outer conductor wire 103 is a helical tube having a helical irregularity and is made of a metal such as copper. The outer conductor wire 103 is screwed into the inner peripheral irregularities 72 of the first outer conductor 7 of the connector 1, which will be described later.

[0018] The sheath 104 is made of electrically insulating resin formed into a cylindrical shape. At the tip end of the coaxial cable 100, the inner conductor wire 101, the insulating member 102, and the outer conductor wire 103 protrude from the sheath 104 to the tip side X1.

[0019] The connector 1 comprises an internal unit 11 that electrically connects the internal conductor wire 101 of the coaxial cable 100 to the mating internal conductor 191 of the mating connector 19, an external unit 12 that electrically connects the external conductor wire 103 of the coaxial cable 100 to the mating external conductor 192 of the mating connector 19, and a first support member 13 and a second support member 14 for supporting the internal unit 11 on the external unit 12.

[0020] Fig. 3 is an exploded half-sectional view of the inner unit 11. Fig. 4 is a view of a contact member 2 and a cap nut 61, which will be described later, viewed from the base end side. As shown in Figs. 1 to 3, the inner unit 11 includes the contact member 2, an inner spacer 3, a first inner conductor 4, a second inner conductor 5, and a pressing mechanism 6.

[0021] The contact member 2 is made of a conductor and is in contact with and electrically conductive to the internal conductor wire 101. The contact member 2 has a bottom portion 21 and a tubular portion 22 formed from the periphery of the bottom portion 21 to the base end side X2. The bottom portion 21 is formed with an insertion hole 211 through which a small-diameter portion 41 (described later) of the first internal conductor 4 is inserted in the axial direction X. The tubular portion 22 has a spiral outer circumferential irregularity 221 formed on its outer circumferential surface. The outer circumferential irregularity 221 is threadedly engaged with the inner circumferential irregularity 101a of the internal conductor wire 101. As shown in FIGS. 1 to 4 , the tubular portion 22 has elongated slits 222 formed in the axial direction X at multiple locations in the circumferential direction. The slits 222 radially penetrate the tubular portion 22, are open on the base end side X2, and are closed on the tip end side X1. Forming multiple slits 222 in the tubular portion 22 makes the tubular portion 22 more flexible in the radial direction.

[0022] A protrusion 223 that protrudes inward is formed at approximately the center of the tubular portion 22 in the axial direction X. The protrusion 223 is formed around the entire circumference except for the area where the slit 222 is formed. The protrusion 223 abuts against the outer peripheral surface of the cap nut 61, and the tubular portion 22 is pushed outward by the cap nut 61 via the protrusion 223, thereby ensuring contact between the tubular portion 22 and the internal conductor wire 101.

[0023] A retaining portion 224 that protrudes inward is formed at the end of the base end side X2 of the tubular portion 22. The retaining portion 224 faces the surface of the base end side X2 of the cap nut 61 in the axial direction X, and serves to prevent the cap nut 61 from slipping out from inside the tubular portion 22 to the base end side X2.

[0024] The internal spacer 3 is made of a conductor and is sandwiched in the axial direction X between the bottom portion 21 of the contact member 2 and a large-diameter portion 42 (described later) of the first internal conductor 4. The internal spacer 3 is formed with a first recess 31 around its entire circumference, which opens to the base-end side X2 and into which the bottom portion 21 of the contact member 2 is inserted. The internal spacer 3 also has an end portion on the tip-end side X1 of its outer peripheral surface recessed inward, and a second recess 32 around its entire circumference into which the inner peripheral end portion of the first support member 13 is inserted. The first support member 13 is an annular member made of an electrically insulating material. The internal spacer 3 is formed with an insertion hole 33, into which a small-diameter portion 41 (described later) of the first internal conductor 4 is inserted in the axial direction X. The first internal conductor 4 is disposed so as to pass through the insertion hole 211 of the bottom portion 21 of the contact member 2 and the insertion hole 33 of the internal spacer 3.

[0025] The first inner conductor 4 is formed long in the axial direction X and is electrically connected to the inner conductor wire 101 at least via the contact member 2. In this embodiment, the first inner conductor 4 is made of a highly rigid conductor such as brass. The first inner conductor 4 has, in order from the base end side X2, a small diameter portion 41, a large diameter portion 42 having an outer diameter larger than that of the small diameter portion 41, and a medium diameter portion 43 having an outer diameter larger than that of the small diameter portion 41 and smaller than that of the large diameter portion 42.

[0026] The small diameter portion 41 has a shaft portion 411 and a male thread portion 412 formed from the shaft portion 411 to the base end side X2. The shaft portion 411 is not threaded on its outer circumferential surface, while the male thread portion 412 is threaded on its outer circumferential surface. The shaft portion 411 is inserted into the insertion hole 211 of the contact member 2 and the insertion hole 33 of the internal spacer 3. The male thread portion 412 is exposed to the space within the tubular portion 22 of the contact member 2.

[0027] The large diameter portion 42 faces the surfaces of the first pivot support member 13 and the inner spacer 3 on the tip side X1 in the axial direction X.

[0028] The medium diameter portion 43 has a female threaded hole 431 that opens to an end face on the tip side X1. A male threaded portion 51 (described later) of the second inner conductor 5 is screwed into the female threaded hole 431. The threads of the female threaded hole 431 and the male threaded portion 51 (described later) of the second inner conductor 5 are formed in the same direction as the threads of the male threaded portion 412 of the first inner conductor 4 and the female threaded hole 611 (described later) of the cap nut 61. As a result, for example, when the second inner conductor 5 is rotated in a direction tightening relative to the first inner conductor 4, the male threaded portion 412 of the first inner conductor 4 is simultaneously tightened into the female threaded hole 611 of the cap nut 61.

[0029] The first inner conductor 4 has a through hole 40 formed therein, which penetrates the first inner conductor 4 in the axial direction X. In this embodiment, the through hole 40 is formed straight in the axial direction X so as to have a constant diameter. The tip side X1 of the through hole 40 communicates with the inner space of the female thread hole 431, and the base side X2 of the through hole 40 opens to the end face of the base side X2 of the small diameter portion 41.

[0030] The second inner conductor 5 has, at its end on the base end side X2, a male thread portion 51 that is screwed into the female thread hole 431 of the first inner conductor 4. For example, the second inner conductor 5 is made of a conductor that is more elastic than the first inner conductor 4. For example, the second inner conductor 5 is made of phosphor bronze.

[0031] A terminal portion 52 is formed at an end portion on the tip side X1 of the second inner conductor 5. The terminal portion 52 is fitted into, for example, a cylindrical mating inner conductor 191 of the mating connector 19 and electrically connected to the mating inner conductor 191. In this embodiment, the terminal portion 52 is formed in a cylindrical shape. The terminal portion 52 also has elongated slits 521 formed in the axial direction X at multiple locations in the circumferential direction. The slits 521 radially penetrate the cylindrical terminal portion 52, and are open on the tip side X1 and closed on the base side X2. Forming the multiple slits 521 in the terminal portion 52 makes the terminal portion 52 more flexible in the radial direction, making it easier to ensure connectivity with the mating inner conductor 191 of the mating connector 19. For this purpose, the second inner conductor 5 is made of a conductor having higher elasticity than the first inner conductor 4.

[0032] Furthermore, an arrangement recess 53 is formed around the entire outer circumferential surface of the second inner conductor 5, at a position between the male thread portion 51 and the terminal portion 52 in the axial direction X. The inner circumferential end of the second axial support member 14 is inserted into the arrangement recess 53. Here, the second axial support member 14 is a member formed by forming an electrically insulating material into a half-annular shape. The second inner conductor 5 is pressed against the first inner conductor 4 toward the tip side X1 by the pressing mechanism 6.

[0033] In this embodiment, the pressing mechanism 6 includes a cap nut 61 screwed onto the male thread portion 412 of the first inner conductor 4, and a pressing member 62 that receives axial force from the cap nut 61 and presses the second inner conductor 5 toward the tip side X1.

[0034] The cap nut 61 has an internally threaded hole 611 that opens to a tip side X1 in the axial direction X and is screwed onto the externally threaded portion 412 of the first inner conductor 4. The cap nut 61 also has a blocking wall 612 that blocks a base side X2 of the internally threaded hole 611.

[0035] Before being threaded onto the male thread portion 412, the cap nut 61 is movable in the axial direction X within the tubular portion 22 of the contact member 2, but is configured to be restricted from rotating about the central axis C. In this embodiment, as shown in Fig. 4, the cap nut 61 has a rotation prevention piece 613 that protrudes outward, and rotation is prevented by inserting the rotation prevention piece 613 into one of the slits 222.

[0036] The cap nut 61 has at least two roles. The first role of the cap nut 61 is to expand the tubular portion 22 of the contact member 2 radially outward to improve contact between the tubular portion 22 and the internal conductor wire 101. As shown in FIG. 1 , the cap nut 61 has an inclined surface 614 that narrows toward the tip end X1 in the axial direction X, and the inclined surface 614 expands the tubular portion 22 radially outward. That is, as the cap nut 61 is threaded onto the male thread portion 412 of the first internal conductor 4, it moves toward the tip end X1 in the axial direction X. Accordingly, the inclined surface 614 gradually presses the protruding portion 223 of the contact member 2 radially outward, expanding the tubular portion 22 radially outward. For example, the inner peripheral surface of the tubular portion 22 may be provided with a tapered surface that narrows toward the tip end X1. In this case, the protruding portion 223 may be omitted.

[0037] The second role of the cap nut 61 is to press the pressing member 62 toward the tip side X1. As the cap nut 61 is screwed onto the male thread portion 412 of the first inner conductor 4, it moves toward the tip side X1 in the axial direction X, and in response to this, the blocking wall 612 presses the second inner conductor 5 toward the tip side X1 in the axial direction X via the pressing member 62.

[0038] The pressing member 62 is formed in a long rod shape in the axial direction X, and is disposed in the through hole 40 so that both ends in the axial direction X protrude. The pressing member 62 is formed to have a smaller diameter than the through hole 40. This allows the pressing member 62 to move in the axial direction X inside the through hole 40 in a state in which the second inner conductor 5 and the cap nut 61 are not screwed onto the first inner conductor 4. The pressing member 62 is made of a highly rigid material such as stainless steel.

[0039] An end portion of the pressing member 62 on the tip side X1 is disposed in the internal space of the threaded portion between the female threaded hole 431 of the first internal conductor 4 and the male threaded portion 51 of the second internal conductor 5, and an end face on the tip side X1 abuts against an end face on the base side X2 of the male threaded portion 51 of the second internal conductor 5. An end face on the base side X2 of the pressing member 62 abuts against the blocking wall 612. The pressing member 62 transmits axial force from the cap nut 61 to the second internal conductor 5 toward the tip side X1. As a result, the second internal conductor 5 is pressed toward the tip side X1 relative to the first internal conductor 4, and a surface 511a of the thread 511 of the male threaded portion 51 of the second internal conductor 5, facing the tip side X1, is pressed against a surface 431b of the thread 431a of the female threaded hole 431 of the first internal conductor 4, facing the base side X2. This increases the friction between the surface 511a and the surface 431b, making the screw engagement between the first inner conductor 4 and the second inner conductor 5 less likely to loosen.

[0040] The outer unit 12 includes a first outer conductor 7 , a second outer conductor 8 , an outer spacer 9 , a first flange member 15 , a joining member 16 and a second flange member 17 .

[0041] The first outer conductor 7 and the second outer conductor 8 electrically connect the outer conductor wire 103 of the coaxial cable 100 to the mating outer conductor 192 of the mating connector 19 .

[0042] The first outer conductor 7 is formed in a substantially cylindrical shape. A sheath arrangement recess 71 and an inner circumferential irregularity 72 are formed on the inner circumferential surface of the first outer conductor 7. The sheath arrangement recess 71 is formed around the entire circumference and is formed to open to the base end side X2, and the sheath 104 is inserted inside it. A seal member S1 such as an O-ring is used to seal between the sheath arrangement recess 71 and the sheath 104. The inner circumferential irregularity 72 is formed on the tip end side X1 of the sheath arrangement recess 71 on the inner circumferential surface of the first outer conductor 7, and is formed in a spiral irregularity shape. The outer conductor wire 103 of the coaxial cable 100 is screwed into the inner circumferential irregularity 72.

[0043] The first outer conductor 7 also has an annular flange portion 73 that protrudes outward. The flange portion 73 is formed with a plurality of female threaded holes 731 into which a plurality of first bolts B1 for fixing the second outer conductor 8 and the first flange member 15 to the flange portion 73 are screwed, respectively.

[0044] The second outer conductor 8 is formed in a substantially cylindrical shape. A first outer recess 81 and a second outer recess 82 are formed on the inner peripheral surface of the second outer conductor 8, the second outer recess 82 being recessed more radially outward than the first outer recess 81 on the base end side X2 of the first outer recess 81. The first outer recess 81 is formed around the entire circumference and is open on the base end side X2. The outer peripheral end of the first pivot support member 13 is disposed in the first outer recess 81.

[0045] The second outer recess 82 is formed around the entire periphery and is open to the base end side X2. The tip end of the first outer conductor 7 and the outer spacer 9 are disposed in the second outer recess 82. The gap between the second outer recess 82 and the outer spacer 9 is sealed by a sealing member S2 such as an O-ring.

[0046] The outer spacer 9 is formed in a cylindrical shape. The outer spacer 9 is sandwiched between the first inner conductor 4 and the first pivot support member 13 in the axial direction X. In this embodiment, the end of the base end side X2 of the outer spacer 9 sandwiches the tip end of the inner conductor wire 101 between itself and the first inner conductor 4.

[0047] The end of the second outer conductor 8 on the base side X2 is fitted onto the first outer conductor 7 from the flange portion 73 to the tip side X1. The gap between the first outer conductor 7 and the second outer conductor 8 is sealed by a sealing member S3 such as an O-ring arranged between the end face of the second outer conductor 8 on the base side X2 and the first outer conductor 7. An outer peripheral protrusion 83 protruding outward along the entire periphery is formed on the end of the base side X2 of the second outer conductor 8. The outer peripheral protrusion 83 engages with the first flange member 15.

[0048] The first flange member 15 is used to fix the second outer conductor 8 to the first outer conductor 7. The first flange member 15 has an annular shape and is formed with a plurality of bolt insertion holes 151 through which a plurality of first bolts B1 are respectively inserted. The first flange member 15 is fitted onto the end of the base end side X2 of the second outer conductor 8. An inner circumferential protrusion 152 that protrudes inward is formed at the end of the tip end side X1 of the first flange member 15. The inner circumferential protrusion 152 abuts against the outer circumferential protrusion 83 of the second outer conductor 8 from the base end side X2. When the first bolt B1 is inserted into the bolt insertion hole 151 and screwed into the female thread hole 731, the inner circumferential protrusion 152 of the first flange member 15 presses the outer circumferential protrusion 83 of the second outer conductor 8 into the tip end side X1, thereby fixing the second outer conductor 8 to the first outer conductor 7.

[0049] A joining member 16 is joined to the end of the tip side X1 of the second outer conductor 8. The joining member 16 is an annular conductor, and is joined over the entire circumference to the end of the tip side X1 of the second outer conductor 8. An externally disposed recess 161 that is open to the tip side X1 is formed over the entire circumference at the end of the tip side X1 of the inner circumferential surface of the joining member 16. The outer peripheral end of the second pivot support member 14 is placed in the externally disposed recess 161.

[0050] The joining member 16 has an outer peripheral protrusion 162 that protrudes outward from the outer periphery. The second flange member 17 is engaged with the outer peripheral protrusion 162 from the base end side X2 in the axial direction X.

[0051] The second flange member 17 is used to fix the joining member 16 to the mating outer conductor 192 of the mating connector 19. The second flange member 17 has an annular shape and is formed with a plurality of bolt insertion holes 171 through which a plurality of second bolts B2 are respectively inserted. The second flange member 17 is fitted onto the outside of the joining member 16. An inner peripheral protrusion 172 that protrudes inward is formed at the end of the base end side X2 of the second flange member 17. The inner peripheral protrusion 172 abuts against the outer peripheral protrusion 162 of the joining member 16 from the base end side X2. The joining member 16 is fixed to the mating connector 19 using the second bolts B2 inserted into the bolt insertion holes 171 and nuts N threaded onto the second bolts B2.

[0052] The mating connector 19 includes a mating inner conductor 191 electrically connected to the second inner conductor 5, and a mating outer conductor 192 electrically connected to the second outer conductor 8 via a connecting member. The mating inner conductor 191 is cylindrical and fitted onto the terminal portion 52 of the second inner conductor 5. For example, the inner diameter of the mating inner conductor 191 is smaller than the outer diameter of a portion of the terminal portion 52 that is inserted into the mating inner conductor 191, thereby bringing the terminal portion 52 into pressure contact with the mating inner conductor 191. The mating outer conductor 192 is cylindrical and surrounds the mating inner conductor 191, and abuts against the joining member 16 in the axial direction X. An outer peripheral groove 192a recessed toward the inner peripheral side is formed around the entire periphery on the outer peripheral surface of the end portion on the base end side X2 of the mating outer conductor 192, and a mating flange member 193 is fitted onto the outer peripheral side of the outer peripheral groove 192a.

[0053] The mating flange member 193 is used to fix the mating outer conductor 192 to the joining member 16. The mating flange member 193 has an annular shape and is formed with a plurality of bolt insertion holes 193a through which the plurality of second bolts B2 are respectively inserted. An inner circumferential groove 193b that opens toward the outer circumferential groove 192a is formed on the inner circumferential surface of the mating flange member 193. Before the mating flange member 193 is fastened to the second flange member 17 with the second bolts B2 and nuts N, movement of the mating flange member 193 in the axial direction X relative to the mating outer conductor 192 is restricted by a C-shaped spring 194 disposed in the inner circumferential groove 193b and the outer circumferential groove 192a. The mating outer conductor 192 is fixed to the mating flange member 193, the second flange member 17, and the joining member 16 by inserting the second bolt B2 into the bolt insertion hole 171 of the second flange member 17 and the bolt insertion hole 193a of the mating flange member 193, and by screwing the nut N onto the second bolt B2.

[0054] When the mating connector 19 is connected to the connector-equipped coaxial cable 10, the inner conductor wire 101 is electrically connected to the mating inner conductor 191 via the contact member 2, the first inner conductor 4, and the second inner conductor 5, and the outer conductor wire 103 is electrically connected to the mating outer conductor 192 via the first outer conductor 7, the second outer conductor 8, and the joining member 16.

[0055] Next, an example of a method for manufacturing the connectorized coaxial cable 10 of this embodiment will be described with reference to FIGS.

[0056] 5 is an exploded cross-sectional view of the first assembly A1, the second assembly A2, and the sealing member S3. As shown in FIG. 5, in the method for manufacturing the connector-attached coaxial cable 10 of this embodiment, first, the first assembly A1 and the second assembly A2 are assembled.

[0057] The first assembly A1 is obtained by assembling the contact member 2, the cap nut 61, the seal member S1, and the first outer conductor 7 to the coaxial cable 100. First, the cap nut 61 is pushed into the inside of the tubular portion 22 of the contact member 2 through the opening on the base end side X2 of the tubular portion 22. Then, the outer peripheral irregularities 221 of the contact member 2 into which the cap nut 61 has been inserted are screwed into the inner peripheral irregularities 101a of the inner conductor wire 101. Next, the seal member S1 is attached to the first outer conductor 7, the outer conductor wire 103 is screwed into the inner peripheral irregularities 72 of the first outer conductor 7, and the sheath 104 is inserted into the sheath placement recess 71. In this way, the first assembly A1 is obtained.

[0058] The second assembly A2 is an assembly of an internal spacer 3, a first internal conductor 4, a second external conductor 8, a pressing member 62, a first axial support member 13, a second axial support member 14, a second external conductor 8, a sealing member S2, an external spacer 9, a joining member 16 and a second flange member 17.

[0059] 6 is a cross-sectional view showing the state in which the first assembly A1 and the second assembly A2 are temporarily assembled. After the first assembly A1 and the second assembly A2 are obtained, the first assembly A1 and the second assembly A2 are assembled together. First, the seal member S3 is fitted onto the first outer conductor 7, and the base end side X2 portion of the second outer conductor 8 is fitted onto the tip end side X1 portion of the first outer conductor 7. The male thread portion 412 of the first inner conductor 4 is inserted into the insertion hole 211 of the contact member 2 and abutted against the opening of the female thread hole 611 of the cap nut 61. Next, the terminal portion 52 protruding from the second pivot support member 14 toward the tip end side X1 is gripped and rotated using, for example, a jig, thereby rotating the second inner conductor 5 and the first inner conductor 4 together, and the male thread portion 412 of the first inner conductor 4 is screwed into the female thread hole 611 of the cap nut 61.

[0060] 7 is a cross-sectional view showing the state in which the first outer conductor 7 and the second outer conductor 8 are fastened together. After the male threaded portion 412 of the first inner conductor 4 is threaded to a certain extent into the female threaded hole 611 of the cap nut 61, the first flange member 15 is fastened to the flange portion 73 of the first outer conductor 7 using the first bolt B1. This fixes the first outer conductor 7 and the second outer conductor 8 together.

[0061] Next, the terminal portion 52 is rotated using, for example, a jig to further advance the threading of the male thread portion 412 of the first inner conductor 4 into the female thread hole 611 of the cap nut 61. FIG. 8 is a cross-sectional view showing a state in which the male thread portion 412 has been completely threaded into the female thread hole 611 of the cap nut 61. As the threading advances, the cap nut 61 moves toward the tip side X1. This movement causes the inclined surface 614 of the cap nut 61 to press and widen the tubular portion 22 via the protrusion 223 of the contact member 2, thereby improving the contact between the contact member 2 and the inner conductor wire 101. This movement also causes the blocking wall 612 of the cap nut 61 to press the pressing member 62 toward the tip side X1, and the pressing member 62 presses the second inner conductor 5 toward the tip side X1. As a result, the surface 511a of the thread 511 of the male thread portion 51 of the second inner conductor 5, facing the tip side X1, is pressed against the surface 431b of the thread 431a of the female thread hole 431 of the first inner conductor 4, facing the base side X2. This increases the friction between the surface 511a and the surface 431b, making the screw engagement between the first inner conductor 4 and the second inner conductor 5 less likely to loosen.

[0062] (Functions and Effects of the First Embodiment) The connector 1 of this embodiment includes a first inner conductor 4, a second inner conductor 5 screwed into the first inner conductor 4 in the axial direction X, and a pressing mechanism 6 that presses the second inner conductor 5 in the axial direction X. This increases friction at the screwed portion between the first inner conductor 4 and the second inner conductor 5, making the first inner conductor 4 and the second inner conductor 5 less likely to loosen. As a result, deterioration in communication quality is suppressed.

[0063] The pressing mechanism 6 has a pressing member 62, at least a part of which is disposed in the inner space of the screwed portion between the first inner conductor 4 and the second inner conductor 5, and which presses the second inner conductor 5 toward the tip side X1 in the axial direction X. By thus configuring the second inner conductor 5 to be pressed from the inner space of the screwed portion, it is easy to prevent the overall size of the connector 1 from increasing.

[0064] The pressing mechanism 6 is a mechanism in which the closing wall 612 of the cap nut 61 presses the second inner conductor 5 toward the tip side X1 in the axial direction X via the pressing member 62. Therefore, the pressing mechanism 6 can be realized with a simple and compact configuration.

[0065] The internal conductor wire 101 is cylindrical with a spiral inner circumferential irregularity 101a formed on its inner circumferential surface. The connector 1 further includes contact members 2 that are fitted onto the cap nut 61, have outer circumferential irregularities 221 on their outer circumferential surfaces that screw into the inner circumferential irregularities 101a of the internal conductor wire 101, and are pushed outward by the cap nut 61. Therefore, the cap nut 61 serves both as the pressing mechanism 6 and to push out the contact members 2, making it easier to form the connector 1 more compact.

[0066] As described above, according to this embodiment, it is possible to provide a coaxial cable connector and a coaxial cable with a connector that can prevent the screw engagement between the first inner conductor and the second inner conductor from loosening over time.

[0067] [Second embodiment] A second embodiment of the present invention will be described with reference to Fig. 9. Fig. 9 is a half cross-sectional view of an inner unit 11 in this embodiment.

[0068] This embodiment is different from the first embodiment in the configuration of the internal unit 11. Hereinafter, the differences between this embodiment and the first embodiment will be mainly described.

[0069] The second inner conductor 5 has a first male threaded portion 51 that screws into the female threaded hole 431 of the first inner conductor 4, and a second male threaded portion 54 that is formed on the tip side X1 of the first male threaded portion 51 and has an outer diameter larger than that of the first male threaded portion 51. A portion of the second male threaded portion 54 adjacent to the tip side X1 is formed to have a larger diameter than that of the second male threaded portion 54, and a restricting surface 55 of this portion that faces the base side X2 is an annular surface. Of the first inner conductor 4 and the second inner conductor 5, the side that has the first male threaded portion 51 and the second male threaded portion 54 (the second inner conductor 5 in this embodiment) is also referred to as a male-side conductor, and the side that has the female threaded hole 431 that screws into the first male threaded portion 51 (the first inner conductor 4 in this embodiment) is also referred to as a female-side conductor.

[0070] A clamping nut 63 is threadedly engaged with the second male thread portion 54. The clamping nut 63 is disposed between the pressure-contact surface 44, which is an end face of the tip side X1 of the first inner conductor 4, and the restricting surface 55, and is in pressure contact with the pressure-contact surface 44. The clamping nut 63 presses the surface 541a of the thread 541 of the second male thread portion 54, which faces the base end side X2, toward the tip side X1, with the surface 631b of the thread 631a of the female thread hole 631, which faces the tip side X1. This presses the second inner conductor 5 toward the tip side X1 with respect to the first inner conductor 4. This presses the surface 511a of the thread 511 of the first male thread portion 51, which faces the tip side X1, against the surface 431b of the thread 431a of the female thread hole 431 of the first inner conductor 4, which faces the base end side X2. This increases the friction between the surface 511a and the surface 431b, making the screw engagement between the first inner conductor 4 and the second inner conductor 5 less likely to loosen.

[0071] In this embodiment, the first inner conductor 4 does not have a through hole (see reference numeral 40 in FIG. 1 etc.). The connector 1 does not include a pressing member (see reference numeral 62 in FIG. 1 etc.). In this embodiment, instead of the cap nut (see reference numeral 62 in FIG. 1 etc.), a nut member 610 having a female threaded hole 610a penetrating in the axial direction X is screwed onto the male thread portion 412 of the first inner conductor 4. The nut member 610 has the same configuration as the cap nut 61, except that it does not include a blocking wall 612.

[0072] When assembling the first inner conductor 4, the second inner conductor 5, and the clamping nut 63 of this embodiment, first, the clamping nut 63 is screwed onto the second male threaded portion 54 of the second inner conductor 5 until it abuts against the restriction surface 55. Next, the first male threaded portion 51 of the second inner conductor 5 is screwed into the female threaded hole 431 of the first inner conductor 4 until the press-contact surface 44 and the clamping nut 63 abut in the axial direction X. Then, the clamping nut 63 is rewound onto the second male threaded portion 54 a predetermined number of times, so that the clamping nut 63 is pressed against the press-contact surface 44. As a result, the clamping nut 63 pushes the second inner conductor 5 up toward the tip side X1, and the surface 511a of the first male threaded portion 51 facing the tip side X1 is pressed against the surface 431b of the thread 431a of the female threaded hole 431 of the first inner conductor 4 facing the base side X2. This increases the friction between the surface 511a and the surface 431b, making the screw engagement between the first inner conductor 4 and the second inner conductor 5 less likely to loosen.

[0073] Other configurations of this embodiment are the same as those of the first embodiment. It should be noted that, among the symbols used in the second and subsequent embodiments, the same symbols as those used in the previously described embodiments represent the same components, etc. as those in the previously described embodiments, unless otherwise specified.

[0074] (Functions and Effects of the Second Embodiment) In this embodiment, the pressing mechanism 6 is a mechanism in which a clamping nut 63 presses the second inner conductor 5 toward the base end side X2 in the axial direction X. In this embodiment, the pressing mechanism 6 can be realized with a simple and compact configuration. In addition, the second embodiment has the same functions and effects as the first embodiment.

[0075] [Variations] Possible modifications of the first and second embodiments will now be described.

[0076] In the first embodiment, an example has been shown in which the screw engagement portion between the first inner conductor 4 and the second inner conductor 5 is formed by the female threaded hole 431 of the first inner conductor 4 and the male threaded portion 51 of the second inner conductor 5. However, a configuration in which the first inner conductor 4 is provided with a male threaded portion and the second inner conductor 5 is provided with a female threaded hole may also be used.

[0077] Furthermore, in the first embodiment, for example, the through hole 40 may be eliminated (i.e., the first inner conductor 4 may be formed solid), and the pressing member may be an elastic member such as a coil spring accommodated in the inner space of the screwed portion between the first inner conductor 4 and the second inner conductor 5. The elastic member serving as the pressing member elastically presses the second inner conductor 5 toward the tip side X1, thereby preventing the screwed portion between the first inner conductor 4 and the second inner conductor 5 from loosening over time.

[0078] In the second embodiment, the first male thread portion 51 and the second male thread portion 54 have different diameters, but the first male thread portion 51 and the second male thread portion 54 may have the same diameter. In this case, in the male thread that is long in the axial direction X, a portion on the tip side X1 may be the first male thread portion 51 that is threaded into the female threaded hole 431 of the first inner conductor 4, and a portion on the base side X2 may be the second male thread portion 54 that is threaded onto the clamping nut 63.

[0079] In addition, in the first and second embodiments, the pressing mechanism 6 is configured to press the second inner conductor 5 toward the tip side X1, but this is not limited to this, and the pressing mechanism 6 may be configured to press the second inner conductor 5 toward the base side X2.

[0080] In the second embodiment, the second inner conductor 5 is a male conductor having the first male threaded portion 51 and the second male threaded portion 54, and the first inner conductor 4 is a female conductor having the female threaded hole 431 that screws into the first male threaded portion 51. However, the first inner conductor may be a male conductor and the second inner conductor may be a female conductor. In this case, the first inner conductor is pressed toward the base end.

[0081] Furthermore, in the second embodiment, a configuration may be adopted in which the inner conductor wire 101 of the coaxial cable 100 is formed solid, and the first inner conductor 4 has a recess into which the inner conductor wire 101 is fitted.

[0082] (Summary of the embodiment) Next, the technical ideas grasped from the above-described embodiments will be described by using the reference numerals and the like in the embodiments. However, the reference numerals and the like in the following description do not limit the components in the claims to the members and the like specifically shown in the embodiments.

[0083] [1] A coaxial cable connector 1 is attached to a tip end of a coaxial cable 100 having an inner conductor wire 101, the coaxial cable connector 1 comprising: a first inner conductor 4 electrically connected to the inner conductor wire 101; a second inner conductor 5 screwed into the first inner conductor 4 in an axial direction X; and a pressing mechanism 6 pressing the first inner conductor 4 or the second inner conductor 5 in the axial direction X.

[0084] [2] The coaxial cable connector 1 according to [1], wherein the pressing mechanism 6 has a pressing member 62, at least a part of which is disposed in an inner space of a screwed portion between the first inner conductor 4 and the second inner conductor 5, and which presses the second inner conductor 5 toward a tip side X1 in the axial direction X.

[0085] [3] The coaxial cable connector 1 according to [2], wherein the first inner conductor 4 has a male thread portion 412 formed at a position closer to a base end side X2 in the axial direction X than a portion where the first inner conductor 4 is screwed with the second inner conductor 5, and a through hole 40 is formed therein, the through hole 40 penetrating in the axial direction X and having a tip side X1 in the axial direction X communicating with the internal space, the pressing mechanism 6 has the pressing member 62 arranged in the through hole 40 such that both ends in the axial direction X protrude from the through hole 40, and a cap nut 61 having a female threaded hole 611 screwed onto the male thread portion 412 and having a blocking wall 612 that blocks a base end side X2 of the female threaded hole 611 in the axial direction X, and the blocking wall 612 presses the second inner conductor 5 toward the tip side X1 in the axial direction X via the pressing member 62.

[0086] [4] The coaxial cable connector 1 described in [3], wherein the inner conductor wire 101 is cylindrical with a spiral inner circumferential irregularity 101a formed on its inner circumferential surface, and further includes a contact member 2 that is fitted onto the cap nut 61, has outer circumferential irregularities 221 on its outer circumferential surface that screw into the inner circumferential irregularities 101a of the inner conductor wire 101, and is pushed outward by the cap nut 61.

[0087] [5] The coaxial cable connector 1 according to [1], wherein the threaded portion between the first inner conductor 4 and the second inner conductor 5 has a female threaded hole 431 formed in one of the first inner conductor 4 and the second inner conductor 5, that is, a female conductor, and a first male threaded portion 51 formed in the other of the first inner conductor 4 and the second inner conductor 5 and threaded into the female threaded hole 431, the male conductor having a second male threaded portion 54 located on a base side of the first male threaded portion 51 in the axial direction X and further having a clamping nut 63 threaded onto the second male threaded portion 54, the female conductor has a pressure-contact surface 44 against which the clamping nut 63 is pressure-contacted from the base side in the axial direction X, and the pressing mechanism 6 is a mechanism in which the clamping nut 63 presses the male conductor toward the base side in the axial direction X.

[0088] [6] A coaxial cable with connector (10), comprising: a coaxial cable (100) having an inner conductor wire (101); and a coaxial cable connector (1) attached to a tip end of the coaxial cable (100), wherein the coaxial cable connector (1) has a first inner conductor (4) electrically connected to the inner conductor wire (101), a second inner conductor (5) screwed into the first inner conductor (4) in an axial direction (X), and a pressing mechanism (6) that presses the first inner conductor (4) or the second inner conductor (5) in the axial direction (X).

[0089] (Addendum) Although the embodiments of the present invention have been described above, the invention according to the claims is not limited to the above-described embodiments. It should be noted that not all of the combinations of features described in the embodiments are necessarily essential to the means for solving the problems of the invention. Furthermore, the present invention can be appropriately modified and implemented within the scope of its spirit. [Explanation of symbols]

[0090] 1...Coaxial cable connector 10...Coaxial cable with connector 100...coaxial cable 101...Inner conductor wire 101a...Inner circumference unevenness 2...Contact member 221...Outer periphery unevenness 4...First inner conductor 40...Through hole 412...Male thread 431...Internal thread hole 44...Pressure contact surface 5...Second inner conductor 51...First male thread 54...Second male thread 6...Pressing mechanism 61...Cap nut 611...Internal thread hole 612…Closing wall 62...Pressing member 63... Clamping nut X…Axis direction X1...Tip side X2…Proximal side

Claims

1. A coaxial cable connector to be attached to the tip of a coaxial cable having an inner conductor wire, a first inner conductor electrically connected to the inner conductor wire; a second inner conductor that is threadedly engaged with the first inner conductor in the axial direction; a pressing mechanism that presses the first inner conductor or the second inner conductor in the axial direction. Connector for coaxial cable.

2. the pressing mechanism has a pressing member at least a part of which is disposed in an inner space of a screw-threaded portion between the first inner conductor and the second inner conductor, and which presses the second inner conductor toward a tip end in the axial direction.

2. The coaxial cable connector according to claim 1.

3. the first internal conductor has a male thread portion formed at a position closer to the base end in the axial direction than a portion where the first internal conductor is screwed with the second internal conductor, and a through hole is formed therein, the through hole penetrating the first internal conductor in the axial direction and communicating with the internal space at a tip end side in the axial direction, The pressing mechanism includes: the pressing member disposed in the through hole such that both axial ends thereof protrude from the through hole; A cap nut having a female threaded hole that is screwed into the male threaded portion and a blocking wall that blocks the base end side of the female threaded hole in the axial direction, the blocking wall presses the second inner conductor toward the tip end in the axial direction via the pressing member; 3. The coaxial cable connector according to claim 2.

4. the inner conductor wire is tubular and has a spiral inner circumferential irregularity formed on its inner circumferential surface; a contact member that is fitted onto the cap nut, has an outer peripheral surface with outer peripheral irregularities that are screwed into the inner peripheral irregularities of the internal conductor wire, and is expanded outward by the cap nut; 4. The coaxial cable connector according to claim 3.

5. a threaded engagement portion between the first inner conductor and the second inner conductor includes a female threaded hole formed in a female conductor, which is one of the first inner conductor and the second inner conductor, and a first male threaded portion formed in a male conductor, which is the other of the first inner conductor and the second inner conductor, and threaded into the female threaded hole; the male conductor includes a second male thread portion located on the axial root side of the first male thread portion, The locking nut further includes a locking nut that is threadedly engaged with the second male thread portion. the female conductor has a pressure contact surface to which the clamping nut is pressure-contacted from the base side in the axial direction, The pressing mechanism is a mechanism in which the clamping nut presses the male conductor toward the base side in the axial direction.

2. The coaxial cable connector according to claim 1.

6. a coaxial cable having an inner conductor wire; a coaxial cable connector attached to a tip end of the coaxial cable, The coaxial cable connector comprises: a first inner conductor electrically connected to the inner conductor wire; a second inner conductor that is threadedly engaged with the first inner conductor in the axial direction; a pressing mechanism that presses the first internal conductor or the second internal conductor in the axial direction. Coaxial cable with connector.

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