JP3527377B2 - Coaxial cable connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector attached to the end of a coaxial cable composed of an inner conductor and an outer conductor.

[0002]

2. Description of the Related Art Heretofore, as a coaxial cable connector of this type, one having a unified specification specified by the installer of the coaxial cable has been known. The structure and the mounting procedure of this product will be described by taking the connector a shown in FIG. 4 as an example. First, with respect to the outer circumference of the coaxial cable 100, the first holding cylindrical body b and the inner peripheral surface of the first holding cylindrical body b. While the second holding cylinder c that is internally fitted by screwing to the and the gasket d that is sandwiched between the first and second holding cylinders b and c are externally fitted,
The third holding cylinder e is disposed on the inner peripheral side of the coating 101 of the coaxial cable 100 and is externally fitted to the outer conductor 102. The third holding cylinder e, the first and second holding cylinders b, The sheath 101 is sandwiched between the coaxial cable 100 and the gasket c to hold the coaxial cable 100. Next, the cylindrical first outer peripheral contact f is internally fitted into the inner peripheral surface of the second holding cylindrical body c by screwing, so that the peripheral edge 1 of the outer conductor 102 is formed.
02a is sandwiched between the first outer peripheral contact f and the third holding cylindrical body e in a pressure contact state. Then, the tubular base end member g
Of the center contact i consisting of and the rod-shaped tip member h,
First, the base end member g is inserted into the inner conductor 103, and the anchor screw j is screwed in to expand the distal end side divided pieces k, k of the base end member g to the outer peripheral side, and thus the base end member g.
And the inner conductor 103 are coupled. After that, the insulator m is fitted, the distal end member h is connected to the proximal end member g by screwing, and finally the second member is externally attached to the distal end member h.
The outer peripheral contact n is coupled to the first outer peripheral contact f by the screw p.

[0003]

However, the above-mentioned conventional coaxial cable connector has the following inconveniences.

First, the electrical connection between the inner conductor 103 and the center contact i becomes insufficient, and as a result, the I.D. M. D
(Internal Modulation Distortion) may increase, that is, the noise generation level at the connection point may increase. That is, the center contact i of the conventional connector a is a wedge-shaped part of the anchor bolt j, and the divided pieces k, k are expanded in the outer peripheral direction, and the center contact i is caused by the sliding frictional resistance force with the inner peripheral surface of the inner conductor 103. Since the connection between the inner conductor 103 and the inner conductor 103 is maintained, the connection is likely to be insufficient depending on the degree of tightening of the anchor bolt j. On the other hand, there is also a possibility of relative displacement from the predetermined coupling position. Due to such looseness or displacement at the connection portion between the center contact i and the internal conductor 103,
I. M. This leads to an increase in D.

Secondly, the electrical connection between the outer conductor 102 and the outer peripheral contact f becomes insufficient, and as a result, I.I. M. This may lead to an increase in D (an increase in noise generation level). That is, the peripheral end edge 102a of the outer conductor 102 is sandwiched between the third holding cylinder e and the outer peripheral contact f to be in a pressure contact state by screwing the outer peripheral contact f into the second holding cylinder c. Therefore, it is easy to loosen due to vibration, and the pressure contact state of the peripheral edge 102a of the outer conductor 102 fluctuates. M. There is a possibility that D may be increased.

Thirdly, the work of attaching the connector a to the coaxial cable 100 is complicated. That is, it is necessary to fix the base end member g to the inner conductor 103 with the anchor bolt j and then attach the tip end member h to the base end member g by screwing it in, which is a factor that increases the labor of the assembly work. Become. Also, the first to the third
After holding the coaxial cable 100 by the holding cylinders b, c, e, in addition to connecting the inner conductor 103 of the base end member g, the first outer peripheral contact f is attached to the second holding cylinder to crimp the outer conductor 102. Screwed into body c, and then the first
The second outer peripheral contact n for connecting to the outer peripheral contact f and another connector that is not connected is connected to the bolts p, p.
Since it is necessary to fix it, it will be troublesome twice.

In addition, the outer conductor 1 of the coaxial cable 100
02 for gas supply for keeping the inside of 02 dry
Need to be attached to the first outer peripheral contact f, so that there is a disadvantage that a protrusion is formed on the outer peripheral side of the connector a.

The present invention has been made in view of such circumstances, and an object of the present invention is to ensure that the coaxial cable is attached to a connector so that the I.D. M. In order to reduce the D.D. M. It is intended to facilitate the work of attaching the connector to the coaxial cable while reducing D.

[0009]

In order to achieve the above-mentioned object, the invention according to claim 1 comprises a small-diameter tubular inner conductor and a large-diameter tubular outer conductor which surrounds the inner conductor in an insulated state. Targeting a coaxial cable connector that is attached to the end of a cable, a tubular connector body that is held against the end of the coaxial cable by fitting the base end side outward from the end of the coaxial cable in the cable axial direction. And the base end is screwed into the inner peripheral surface of the inner conductor end to be electrically connected in close contact with the end face of the inner conductor, while the tip end is outward from the end of the coaxial cable in the cable axial direction. It shall be provided with a rod-shaped central contact protruding inward. In addition, a cylindrical outer periphery that surrounds the center contact in an insulated state and is joined to the connector body in a state in which the base end side faces the tip peripheral surface of the connector body and is prevented from rotating relative to the connector body by the coupling means. The outer circumference contact of the outer conductor is provided between the base end peripheral surface and the front end peripheral surface of the connector body by fitting the contact and the outer peripheral contact into the base end side opening of the outer peripheral contact. At the same time as sandwiching the end edge in a pressure contact state, the tip peripheral surface is pressed against the inner end surface of the outer peripheral contact to electrically connect the outer conductor to the outer peripheral contact, the outer peripheral surface of the center contact, and Contact color
It is inserted between the inner peripheral surface of the
An annular insulator that supports the contact collar in an insulated state
And a configuration including.

The contact collar is
A convex portion protruding toward the inner peripheral side is formed on the peripheral surface side.
Along with the annular insulator, the inner peripheral surface of the center contact
It is fitted on the outer peripheral surface, and the outer peripheral surface has a contact collar.
It is internally fitted to the inner peripheral surface, and the center contact is
By being screwed in and connected, the circumference of the outer conductor
Connect the edge to the peripheral surface of the contact collar and the connector body.
The pressing force to keep it sandwiched between the tip peripheral surface and
Transmission from the above center contact to the contact collar
In addition, the outer peripheral portion of the annular insulator,
The convex portion of the contact collar and the outer peripheral contact
It will be sandwiched between the cable and the cable from both sides in the axial direction.

In the case of the above structure, since the center contact is screwed into the inner peripheral surface of the inner conductor and is joined in close contact with the end surface of the inner conductor, the inner conductor and the center contact are displaced in the cable axial direction. It is possible to eliminate the possibility of occurrence of noise and to make a reliable electrical connection. In addition, since the outer peripheral contact and the connector main body are connected to each other in a non-rotating state by the connecting means, the contact collar and the connector main body fitted in the outer peripheral contact sandwich the peripheral edge of the outer conductor therebetween. In this state, the outer conductor and the outer peripheral contact can be securely electrically connected via the contact collar without being loosened. By ensuring the electrical connection of each of the inner conductor and the outer conductor as described above, the I.D. M. D can be reduced.

In addition, by fitting the annular insulator to the center contact and screwing the center contact into the inner conductor with the contact collar fitted to the insulator, the center contact and the inner conductor are connected. In addition to the reliable connection, the peripheral edge of the outer conductor is sandwiched between the contact collar and the connector body. Therefore, before connecting and fixing the outer peripheral contact to the connector body,
The peripheral edge of the outer conductor can be sandwiched between the contact collar and the connector body in a state where it can be seen from the outside, and the pressure contact state of the peripheral edge of the outer conductor can be reliably ensured. In addition, the work of putting the peripheral edge of the outer conductor into a pressure contact state is facilitated.

According to a second aspect of the present invention, as the center contact in the first aspect of the present invention, a base end member having a connecting portion which is connected to the internal conductor by screwing is coupled to the base end member. And a tip member that is formed. The tip member is held in an insulated state with respect to the inner peripheral surface on the tip side of the outer peripheral contact, while the base end portion of the tip member and the tip end portion of the base end member are fitted to each other in the cable axial direction by concavo-convex fitting. It is configured to be coupled by

In the case of the above construction, by setting the tip member on the outer peripheral contact side in advance, the outer peripheral contact is opposed to the connector body in the cable axial direction after fixing the base member to the inner conductor. The tip member is joined to the base member by concavo-convex fitting only by connecting. Therefore, it is possible to automatically connect the distal end member and the proximal end member of the center contact to each other only by performing the connecting work of the outer peripheral contact to the connector body.

According to a third aspect of the invention, in the first aspect of the invention, a female screw portion is formed on the inner peripheral surface of the end portion of the inner conductor, and the female screw portion is formed on the outer peripheral surface of the base end portion of the center contact. A male screw portion to be screwed into is formed, and the female screw portion and the male screw portion are respectively formed by trapezoidal screws.

In the case of the above construction, since the female thread portion on the inner peripheral surface of the inner conductor and the male thread portion on the outer peripheral surface of the center contact are each made up of a trapezoidal screw, the female thread portion becomes a shallow carved valley portion. In addition, such tapping of the valley portion can be performed by one tap cutting operation, the operation is facilitated, and damage to the internal conductor due to the tap cutting can be reliably prevented. In addition, the thickness reduction of the inner conductor due to the tap cutting work is smaller than that of the valley portion of the normal V-shaped screw, which improves the mechanical strength of the inner conductor and the tensile force in the coupled state with the center contact. The strength can be improved.

Further, the invention according to claim 4 is the same as claim 1.
In the invention described above, it is assumed that the outer peripheral contact has a flange portion whose diameter is expanded in the outer peripheral direction on the base end side thereof, and as the connecting means, two or more members which penetrate the flange portion and are screwed into the connector main body. It is composed of bolts.

In the case of the above structure, the structure of the connecting means for connecting the outer peripheral contact and the connector main body is specifically specified, the outer peripheral contact and the center contact are surely connected in a non-rotating state, and the outer conductor is also formed. It is possible to reliably maintain the peripheral edge of the pressure contact state. Moreover, since the work of connecting the outer peripheral contacts is performed only by penetrating the flange portion and tightening the bolts, the work can be performed easily and reliably.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment in which the present invention is applied to a connector for connecting the ends of a leaky coaxial cable 100, and 2 is a cylindrical shape which is fitted and held on the ends of the coaxial cable 100. Connector body 3 is the connector body 1
On the other hand, outer peripheral contacts 5 which are joined by a plurality of (four in the illustrated example) hexagon socket head cap screws 4, 4, ...
Reference numeral 6 is a contact collar for crimping 02, 6 is a center contact coupled to the inner conductor, and 7 is an insulator as an annular insulator.

The leaky coaxial cable 100 is
Tubular inner conductor (copper pipe or aluminum pipe) 10
3, a cylindrical insulator (insulating tube) 104 surrounding the inner conductor 103, and an outer conductor with a slot wound to cover the outer peripheral surface of the insulating tube 104 (corrugated aluminum tape or corrugated copper tape) 102, a coating layer 101 that covers the outer conductor 102, and a conductor insulating tube 104 that is spirally wound around the outer periphery of the inner conductor 103.
And an insulator (cordell) 105 that maintains a distance between the inner conductor 103 and the inner conductor 103. In the leaky coaxial cable 100, the outer conductor 102 is provided with cuts (slots) at a constant pitch to have a function of transmitting and radiating electromagnetic waves, and is used as a train radio, a mobile phone, or a mobile phone in an underground mall. It is used as a leaky waveguide line for mobile communication.

Each element constituting the above connector will be described in detail below.

The connector body 2 includes a first holding cylinder 21.
The second holding tubular body 22, the third holding tubular body 23, and the gasket 24. The first holding cylinder 21 and the gasket 24 are externally fitted to the outer periphery of the coating layer 101 of the coaxial cable 100, while the third holding cylinder 23 is inserted between the coating layer 101 and the outer conductor 102. And
The end of the coaxial cable 100 is pushed by pressing the gasket 24 with the second holding cylinder 22 while the covering layer 101 is sandwiched between the first and third holding cylinders 21 and 23 with the gasket 24 interposed therebetween. The connector body 2 is held by the covering layer 101 of the portion. The above-mentioned second holding cylinder 22 and the first and third cylinders 21 and 23 are integrated by screwing the threaded portion 22a on the inner peripheral surface of the second holding cylinder 22.
Is screwed into the threaded portion 23a on the outer peripheral surface of the third holding tubular body 23, while the threaded portion 22b on the outer peripheral surface of the second holding tubular body 22 is screwed into the threaded portion 21a on the inner circumferential surface of the first holding tubular body 21. Done by. It should be noted that reference numerals 21c and 22c in FIG. 2 are flat portions into which a wrench is fitted during the above-mentioned screwing operation. In addition, a plurality (4 in the illustrated example) in the circumferential direction is formed on the end face of the second holding cylinder 22 on the tip side (the left end side in FIG. 1).
Screw holes 22d, 22d, ... Are formed, and the bolts 4 are screwed into the screw holes 22d.

The outer peripheral contact 3 is constructed by integrally connecting a cylindrical outer peripheral contact body 3a having both ends open and a tip contact 3b.
The outer peripheral contact body 3a includes a large diameter portion 31 and a small diameter portion 3
2, the large diameter portion 31 is integrally formed with a flange portion 33 projecting to the outer peripheral side, and the small diameter portion 32 is provided with a screw hole 34 (see FIG. 1) for connecting a terminal for supplying dry gas. (Only shown in FIG. 2) and a plug 35 that is detachably screwed into the plug 35. The second holding cylinder 2 is provided on the flange portion 33.
Connection holes 33a, 33a, ... Are formed at positions corresponding to the screw holes 22d, 22d, ... of the second screw hole 22, and the bolts 4 inserted into the connection holes 33a correspond to the screw holes 22.
It is designed to be screwed into d. Further, the outer peripheral surface of the contact collar 5 is fitted in the proximal end opening side of the large-diameter portion 31 in a substantially adhered state, and is prevented from further moving toward the distal end side (left side in FIG. 1) in the cable axis X direction. The recessed step portion 36 is provided so as to abut. In addition, the recessed step portion 36 also holds the outer peripheral portion of the insulator 7, which will be described later. Further, the large-diameter portion 31 has a protruding piece 37 which is continuous with the recessed step portion 36 and protrudes from the end face on the proximal end side so as to be internally fitted between the second holding tubular body 22 and the third holding tubular body 25. The peripheral edge 102 a of the outer conductor 102 is bent by the projecting piece 37 and sandwiched between the outer conductor 102 and the third holding cylinder 25 in a pressure contact state.

On the other hand, the tip contact 3b has a cylindrical second tip member 6b, which will be described later, of the center contact 6.
The tip contact 3b is held in advance via the insulator 7a, and in the state where the tip member 62 is held, the inner peripheral surface of the base end side opening is preferably more than the outer peripheral surface of the small diameter portion 32 on the tip side. The peripheral contacts are screwed in with the adhesive applied to each peripheral surface, whereby the tip contact 3b and the outer peripheral contact body 3a are integrated with each other. In addition, a threaded portion 38 is formed on the outer peripheral surface of the tip end contact 3b on the tip end side, and the threaded portion 38 connects to the outer peripheral contact of another connector attached to the coaxial cable or the like on the non-connection target side. Is to be done.

The contact collar 5 has a tip surface 5
When the outer peripheral contact 3 is connected to the connector body 2 by tightening the bolts 4 in a state where the outer peripheral contact 3 is abutted against the concave step portion 36 of the outer peripheral contact 3, the base end surface 5
2 is crimped in the cable axis X direction with the peripheral edge 102a of the outer conductor 102 being sandwiched between the two and 5, 25 with respect to the front end surface of the third holding tubular body 25. Also,
On the inner peripheral surface side of the contact collar 5, a convex portion 53 protruding toward the inner peripheral side is formed, and the outer peripheral portion of the insulator 7 is sandwiched between the convex portion 53 and the concave step portion 36 from both sides in the cable axial direction. It is supposed to be.

Each of the center contacts 6 has its outer surface covered with an electric path forming plating layer made of silver plating, and is connected to the base end member 6a connected to the internal conductor 103 and the base end member 6a. It is constituted by the tip member 6b. The base end member 6a is formed with a male screw portion 61 formed of a trapezoidal screw on the outer peripheral surface of the base end portion, and adjacent to the male screw portion 61, a pair of flange portions 62, 63 is provided on the tip side in the cable axis X direction. Is formed, and in addition, a head portion 64 is formed at the tip end portion to be coupled with the tip end member 6b by fitting. The male screw portion 61 is screwed until the tip end surface of the inner conductor 103 abuts the collar portion 62 with respect to the female screw portion 103a formed by a trapezoidal valley portion formed in advance on the inner peripheral surface of the end portion of the inner conductor 103 by tapping. It is supposed to be included. Further, the inner peripheral portion of the insulator 7 is externally fitted into the recess 65 between the pair of flange portions 62, 63 and is sandwiched by the pair of flange portions 62, 63 to move the insulator 7 in the cable axis X direction. Are being blocked. 1 and 2, 66 is a through hole,
By inserting a shaft portion of a driver having a small diameter into the through hole and rotating the screw portion, the female screw portion 10 of the male screw portion 61 is rotated.
Tightening to 3a is performed.

As shown in detail in FIG. 3, the male screw portion 61 has a trapezoidal cross-section thread 61a, while the female thread portion 103a has a trapezoidal cross-section valley 103b corresponding to the screw thread 61a. It is composed by.
As a result, the height H of the thread 61a and the valley 103a is made lower than that of the V-shaped screw, and the internal thread 103a is formed.
The mechanical strength of the inner conductor 103 is increased by reducing the thickness reduction of the inner conductor 103. The angle R of the thread 61a is preferably set to 30 degrees, for example.

On the other hand, at the base end portion of the tip end member 6b in the cable axis X direction, an opening is formed so as to face the head portion 64 side, and the cable axis X is opened.
The recessed portion 67 formed of a plurality of split pieces is formed by a plurality of split grooves extending in the direction, while the tip portion has
A plurality of connecting portions 68 are formed by the same split groove. When the head 64 is relatively pushed in the cable axis X direction, the recessed portion 67 is elastically deformed to the side where each of the divided pieces is pushed open so that each divided piece holds the head 64. As a result, the distal end member 6b and the proximal end member 6a are automatically coupled to each other.

The insulator 7 is made of, for example, polyethylene or fluororesin, and is formed into a disk shape by a pair of half-divided members 71, 71 which are divided into two parts in the diameter direction, and a plurality of penetrating parts having a predetermined diameter are provided around the circumference. It has holes 72, 72, .... The split members 71 are closely fitted in the inner peripheral surface of the contact collar 5 in the cable axis X direction in a state where the split members 71 are fitted in the recesses 65 of the base end member 6a of the center contact 6 in the radial direction. The outer peripheral contact 3 side and the center contact 6 side are kept insulated from each other.

The distance between the outer peripheral surface of the central contact 6 and the inner peripheral surface of the outer peripheral contact 3 is such that when the outer diameter of the central contact 6 is D1 and the inner diameter of the outer peripheral contact 3 is D2. The respective values of D1 and D2 are determined so that the characteristic impedance Z0 represented by the following equation becomes 50Ω, and the radial direction spacing is determined based on the set respective diameters D1 and D2.

Z0 = (138.1 / √ε) log ₁₀ (D2 / D1) where ε is the effective permittivity, the space (air) part is 1.0, and the fluororesin insulator 7 part is 2 .1
Becomes

Next, the operation and effect of the connector will be described while explaining the procedure for attaching the connector having the above-mentioned configuration to the end portion of the coaxial cable 100.

First, the first to third holding cylinders 21, 22, 2
The connector body 2 composed of 3 and the gasket 24 is held at the end of the coaxial cable 100. In this state, the peripheral edge 102a of the outer conductor 102 is cut at appropriate intervals and is bent outward along the tip surface of the third holding cylinder 23.

Next, the pair of half-divided members 71, 71 is fitted onto the recess 65 of the base end member 6a of the center contact 6, and the contact collar 5 is fitted on the outer peripheral portion of the insulator 7. The male screw portion 61 of the base end member 6a in this state is screwed into the female screw portion 103a of the inner conductor 103, and the inner conductor 10
The tip surface of 3 is strongly pressed against the brim portion 62.
As a result, the base end member 6a and the inner conductor 103 are securely pressed against each other at the end faces orthogonal to the cable axis X without displacement in the cable axis X direction, and the base end face 52 of the contact collar 5 is the above. Folded peripheral edge 1
02a is sandwiched in between and pressed against the front end surface of the third holding cylinder 23, so that the peripheral edge 102a is temporarily pressed. Moreover, since the clamping of the peripheral edge 102a by the contact collar 5 is performed in a state of being visible from the outside, the clamping operation can be performed easily and reliably.

Then, the outer peripheral contact 3 in which the front end member 3b in which the front end member 6b of the center contact 6 is housed in advance is integrated with the outer peripheral contact body 3a is fixed to the connector body 2. This fixing is performed by screwing the bolts 4, 4, ... Inserted into the connecting hole 33a of the flange portion 33 of the outer peripheral contact 3 into the screw holes 22d of the second holding cylinder 22 and tightening them. By this tightening, the contact collar 5 is abutted against the end surface of the concave step portion 36 and strongly pressed against the side of the third holding cylindrical body 23, so that the peripheral edge 102a is surely prevented from loosening in the rotation direction. In addition to being in a pressure contact state, the head 64 of the base end member 6a can be automatically fitted into the recessed portion 67 of the tip end member 6b and can be connected to each other, and the conventional connector a (see FIG. 4) can be used.
In this case, as compared with the case where the tip end member h needs to be screwed into the base end member g, the attachment work can be facilitated by omitting the work process.

As described above, since the inner conductor 103 is firmly connected to the center contact 6 and the outer conductor 102 is firmly connected to the outer peripheral contact 3, they may be loosened or displaced due to vibration or the like. In comparison with the case of the conventional connector a having the I.V. M. D can be significantly reduced.

Further, since the mounting portion for the terminal for supplying the dry gas is disposed in the small diameter portion 32 of the outer peripheral contact body 3a, even when the above terminal is mounted, the terminal should protrude from the connector to the outer peripheral side. There is also no protrusion unlike the conventional connector a.

<Other Embodiments> The present invention is not limited to the above-described embodiments, and includes various other embodiments. That is, in the above embodiment, the center contact 6 is divided into the base end member 6a and the tip end member 6b, but the present invention is not limited to this, and both may be integrally configured. In this case, when attaching the integrally formed center contact to the connector body of the outer peripheral contact after attaching it to the inner conductor,
The outer peripheral contact may be placed over the center contact for insertion.

In the above embodiment, the male screw portion 61 and the female screw portion 103a are formed by trapezoidal screws, but if the center contact and the inner conductor can be fixed by screwing, they can be formed by ordinary V-shaped screws. May be.

[0041]

[Test example] Short (about 0.8 m) leaky coaxial cable L
-LCX43D (manufactured by Mitsubishi Cable Industries, Ltd.) with the connector of the present embodiment attached, and a conventional connector a
(See FIG. 4) is attached mainly to I.
M. A comparative test was performed on D. Further, in the connector of the present embodiment, two types of the outer peripheral contact 3 and the connector body 2 were compared, one having a Ni plating film as a plating layer for forming an electric passage and the other having an Ag plating film.

The test conditions are f1 =
Two waves of 1425 MHz and f2 = 1450 MHz,
There are two types of transmission power, 10 W × 2 and 20 W × 2. Then, in two states, that is, an initial state of a stationary state and a state of being shocked, how much noise is generated by interference when the above two waves are transmitted, that is, I.D. M. D was measured. At this time, V. S.
W. R was also measured.

The test results are shown in Table 1.

[0044]

[Table 1] According to the test results of Table 1, in the initial state, in the case of the connector of the present embodiment, the I.V. M. D is less than or equal to the detection limit of the measuring device, whereas the connector a of the embodiment has a −97 dBm fifth-order I.D. M. D and −100 dBm 7th order I.D. M. D and occurred. Further, in the shocked state, the connector of the present embodiment has an I.V.
M. Although D exceeds the detection limit of the above-mentioned measuring instrument, it remains at a minute value, whereas in the case of the conventional connector a, it is -85.
5th order I.D. M. D and white noise, which is an obstacle to practical use, were generated. In addition, these tendencies indicate that the plating film is N
i and Ag are the same regardless of whether Ni and A
There was no difference in the plating film from g. Further, in the case of the connector of this embodiment, V. S. W. The values of R are also very good with values close to 1.10 and 1.00, while the conventional connector a is 1.37, which is considerably inferior to the present embodiment. The V. S. W. The standard value of R is 1.5.

[0045]

As described above, according to the coaxial cable connector of the first aspect of the present invention, the internal conductor and the center contact are reliably prevented from slipping or coming off in the cable axial direction. In addition, the outer peripheral contact and the connector main body are coupled to each other in a non-rotating state by a coupling means, and the contact collar internally fitted to the outer peripheral contact and the connector main body are provided between the outer conductor and the outer conductor. It is possible to securely crimp with the peripheral edge of the outer peripheral edge sandwiched therebetween, and it is possible to securely electrically connect the outer conductor and the outer peripheral contact through the contact collar without loosening. This allows
I. at the connector mounting portion of the coaxial cable M. It is possible to reduce D.

[0046] Further, before connecting and fixing the outer peripheral contact against the connector body, it can be performed in a state that can be visually recognized work sandwiching the peripheral edge of the outer conductor between the contact collar and connector body from the outside, the outer conductor The pressure contact state of the peripheral edge of the outer conductor can be surely set to a predetermined value, and the work of bringing the peripheral edge of the outer conductor into the pressure contact state becomes easy.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the tip end member is set in advance on the outer peripheral contact side, so that the outer peripheral contact is connected to the connector body. Only by this, the front end member and the base end member of the center contact can be automatically joined, and the mounting work can be facilitated by reducing the number of work steps.

According to the invention of claim 3 , in addition to the effect of the invention of claim 1, the female screw portion of the inner peripheral surface of the inner conductor and the male screw portion of the outer peripheral surface of the center contact are each trapezoidal screw. The internal thread of the inner conductor forms a shallow carved part, and tapping of such a trough can be easily performed by one tap cutting operation. It becomes possible to reliably prevent the occurrence of damage. In addition, the reduction in the thickness of the inner conductor due to the tap cutting work can be reduced as compared with the valley portion of the normal V-shaped screw, which improves the mechanical strength of the inner conductor and reduces the contact with the center contact. The tensile strength in the bonded state can be improved.

Furthermore, according to the invention of claim 4 , in addition to the effect of the invention of claim 1, the outer peripheral contact and the center contact are surely connected in a non-rotating state, and
It is possible to reliably maintain the peripheral edge of the outer conductor in the pressure contact state. Moreover, since the work of connecting the outer peripheral contacts only involves passing through the flange portion and tightening the bolts,
Compared with the conventional case where the entire outer peripheral contact is rotationally tightened, the work can be performed easily and surely.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an embodiment of the present invention.

2 is an exploded perspective view of the embodiment of FIG. 1. FIG.

FIG. 3 is a partially enlarged cross-sectional view of a state in which a female screw portion of the inner conductor and a male screw portion of the center contact are screwed together.

FIG. 4 is a view corresponding to FIG. 1 showing a conventional connector.

[Explanation of symbols]

2 Connector body 3 Outer contact 4 bolts (coupling means) 5 contact colors 6 center contact 6a Base member 6b Tip member 7 Insulator (annular insulator) 33 Flange 52 Contact collar base end face (base end peripheral face) 61 Male screw part (connecting part) 64 heads (tip of base member) 67 Recessed portion (base end portion of tip member) 100 coaxial cable 102 outer conductor 102a peripheral edge 103 inner conductor 103a female thread X cable axis

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akio Kusunii 1-7-11 Aoki, Kawaguchi City, Saitama Sanei Electric Industry Co., Ltd. (56) Reference JP-A-8-78105 (JP, A) JP SHO 60-189184 (JP, A) ACT 55-91076 (JP, U) ACT 60-32775 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 17 / 04

Claims (4)

(57) [Claims] 1. A coaxial cable connector which is attached to an end portion of a coaxial cable composed of a small-diameter tubular inner conductor and a large-diameter tubular outer conductor which surrounds the inner conductor in an insulated state, wherein the proximal end side is the end of the coaxial cable. Portion of the inner conductor, which is held against the end of the coaxial cable by being externally fitted in the axial direction of the coaxial cable, and the base end portion of which is screwed onto the inner peripheral surface of the inner conductor end portion of the inner conductor. While being electrically connected in close contact with the end face, a rod-shaped center contact whose tip portion projects outward from the end portion of the coaxial cable in the axial direction of the cable, and surrounds this center contact in an insulated state, and the base end side is the connector body. A cylindrical outer peripheral contact that is connected to the connector body in a state in which relative rotation is blocked by the connecting means in a state of facing the tip peripheral surface of the outer peripheral contact of By fitting in the end side opening and connecting the outer peripheral contact to the connector body,
The outer peripheral edge of the outer conductor is sandwiched between the proximal end peripheral surface and the distal end peripheral surface of the connector body in a pressure contacted state, and at the same time, the distal end peripheral surface is pressure contacted with the inner end surface of the outer peripheral contact to connect the outer conductor. a contact collar for electrically connecting to the outer peripheral contact, the outer peripheral surface of the central contact and the contact collar
Installed between the inner surface and the center contact
A ring-shaped insulator that supports the contact collar in an insulated state, and the contact collar projects toward the inner peripheral side on the inner peripheral surface side.
Is convex portion is formed, the annular insulator, an outer peripheral surface of the center contact the inner circumferential surface
It is fitted and the outer peripheral surface is the inner peripheral surface of the contact collar.
Internally fitted, the center contact is screwed onto the inner conductor.
The outer peripheral edge of the outer conductor is
The peripheral surface of the contact collar and the peripheral surface of the connector body.
The pressing force that keeps it sandwiched between the
From contact to contact color
In addition to being configured , the outer peripheral portion of the annular insulator is above the contact collar.
Both the axial direction of the cable between the convex
A coaxial cable connector that is pinched from the side . 2. The center contact according to claim 1, further comprising a base end member having a connecting portion that is connected to the inner conductor by screwing, and a front end member connected to a front end portion of the base end member. The tip member is held in an insulated state with respect to the inner peripheral surface on the tip side of the outer peripheral contact, while the base end portion of the tip member and the tip end portion of the base end member engage with each other in the axial direction of the cable. A connector for a coaxial cable, characterized in that it is configured to be coupled by the above. 3. The internal thread portion according to claim 1, wherein the inner peripheral surface of the end portion of the inner conductor is formed, and the outer peripheral surface of the base end portion of the center contact is formed with a male screw portion that is screwed into the female screw portion. A connector for a coaxial cable, wherein each of the female screw portion and the male screw portion is formed of a trapezoidal screw. 4. The outer peripheral contact according to claim 1, wherein the outer peripheral contact has a flange portion on the base end side of which the diameter is expanded in the outer peripheral direction, and the coupling means penetrates through the flange portion and is screwed into the connector body. A connector for a coaxial cable, characterized in that it is constituted by two or more bolts.