JP4142795B2 - Coaxial cable connector and cable connection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coaxial cable connector and a cable connection method thereof, and particularly relates to a coaxial cable connector having a reduced diameter and a cable connection method thereof.
[0002]
[Prior art]
Conventional conventional coaxial cable connectors have a coaxial cable folded back in a reverse direction to contact and connect to a ferrule attached to an outer sheath, and a cylindrical outer conductor is covered on the ferrule. The overlapping portion is crimped from the outside, and the outer conductor, the ferrule, and the shield wire are crimped and fixed.
[0003]
In such a structure, since the ferrule, the shield wire, and the outer conductor overlap on the outer sheath of the coaxial cable, it is difficult to reduce the diameter. Here, a ferrule is attached to the inner sheath of the coaxial cable so that the shield wire is covered in the forward direction (without folding), and is covered with an outer conductor to be crimped and fixed. Have been proposed (see, for example, JP-A-7-288161).
[0004]
A cross-sectional side view of an example of a coaxial cable connector having such a structure is shown in FIG. First, the coaxial cable 100 to which the coaxial cable connector is connected and mounted basically includes a center conductor 101, an inner sheath 102 covering the center conductor 101, and a shield wire covering the outer side of the inner sheath 102. 103 and an exterior covering 104 that covers the outside of the shielded wire 103.
[0005]
The coaxial cable connector includes a core wire connection portion 11x to which the central conductor 101 of the coaxial cable 100 is crimped, a coupling contact portion 12x to be coupled and connected to the mating contact, and a connection conductor 13 that connects these to each other. The center contact 10x and the center contact 10x, and the center conductor 101 of the coaxial cable 100 connected to the center contact 10x and the distal end portion of the inner covering 102 are held inside each other by the adhesive tape 55 while being divided. The joined insulating lids 50a and 50b (with a cylindrical locking portion 51 at the tip of 50a) and the portion of the inner coating 102 adjacent to the insulating lids 50a and 50b are fixed by being wound around the outside. A metal ferrule 30x that is in contact with the surface so as to cover the shield wire 103 in the forward direction; The lids 50a and 50b (other than the cylindrical locking portion 51), the ferrule 30x that covers the shield wire 103, and the tip of the outer sheath 104 are covered, and the ferrule 30x and the shield wire 103 are subjected to crimping from the outside. (Crimping portion 41x), ferrule 30x, shield wire 103, and a cylindrical outer conductor 40x that is crimped and fixed and fixed.
[0006]
Next, the connection and mounting method of this coaxial cable connector to the coaxial cable 100 will be described with reference to the perspective views in the order of steps shown in FIGS. First, as shown in FIG. 4A, the coaxial cable 100 is inserted into the outer conductor 40x, and the tip portion of the coaxial cable 100 is exposed to the length of the exposed central conductor 101, the length of the inner coating 102, and the shield. Each of the lines 103 is processed so as to have a predetermined length, and the exposed portion of the shield line 103 is folded back on the exterior covering 104 in the reverse direction.
[0007]
Next, as shown in FIG. 4B, the exposed portion of the shield wire 103 is crimped and connected to the core wire connecting portion 11x of the center contact 10x, leaving a part of the inner coating 102 side.
Next, as shown in FIGS. 4C and 4D, the center contact 10x, a part of the center conductor 101, and the tip of the inner coating 102 are accommodated in the respective accommodation locations of the insulating lids 50a and 50b. The insulating lids 50a and 50b are held and bonded to each other with the adhesive tape 55, and the plate-like ferrule 30x is bent and attached to the exposed portion of the inner coating 102 so as to be wound around the portions adjacent to the insulating lids 50a and 50b. Then, the shield wire 103 is returned in the forward direction and brought into contact with the surface of the ferrule 30x so as to cover it uniformly.
[0008]
Then, as shown in FIGS. 4D and 4E, the outer conductor 40x is moved in the direction of the distal end of the coaxial cable 100 so that the outer conductor 40x is insulated by the insulating lids 50a and 50b, the shield wire 103 and the ferrule 30x, and At a position corresponding to the shield wire 103 and the ferrule 30x, it is stopped at a position that covers the front end portion of the exterior covering 104 (more specifically, a position that stops by hitting the cylindrical locking portion 51 of the insulating lid 50a). A crimping process is performed from the outside (crimp part 41x), and the shield wire 103, the ferrule 30x, and the external conductor 40x are crimped and fixed.
[0009]
As in this example, if the ferrule 30x is attached and fixed so as to be wound around the surface of the inner coating 102, and the shield wire 103 is covered thereon, the diameters of the ferrule 30x and the shield wire 103 are reduced. The diameter of the entire connector can be reduced. That is, the diameter can be reduced.
[0010]
In this example, the center contact 10x includes a core wire connection portion 11x that crimps and connects the center conductor 101 of the coaxial cable 100, a coupling contact portion 12x that couples and contacts the counterpart contact, and a connection conductor that connects these to each other. Insulating lids 50a and 50b that hold the center contact 10x stably hold them at the same time, and at the same time, expose the exposed portion of the center conductor 101 that is crimp-connected to the core wire connection portion 11x, and the inner coating. In order to securely hold the tip portion of 102, each portion is configured to be stably stored.
[0011]
[Problems to be solved by the invention]
The conventional coaxial cable connector described above has a structure in which the ferrule 30x is wound around the surface of the inner coating 102 of the coaxial cable 100 and the shield wire 103 is covered thereon, so that the ferrule 30x and the shield wire 103 are covered. Although the diameter of the portion is reduced and the diameter of the entire connector is reduced and the diameter can be reduced, the center contact 10x is composed of three parts: a core wire connection part 11x, a coupling contact part 12x, and a connection conductor 13. Therefore, the inner shape of the insulating lids 50a and 50b for housing and holding the center contact 10x is complicated, and when the center contact 10x of this complicated shape is housed, the insulating lid It is necessary to divide the bodies 50a and 50b and combine them after storage and fix them with the adhesive tape 55. The manufacturing cost of the cable 10x and the insulating lids 50a and 50b is increased, the overall cost of the connector is increased, and the mounting to the cable is complicated, and the insulating lids 50a and 50b are held inside. In order to stably hold the center contact 10x and the like, a certain amount of thickness is required, and the outer diameter of the entire connector is determined by the outer diameter, so that the reduction in diameter is limited by the insulating lids 50a and 50b. The problem is that the shape of the center contact 10x and the insulating lids 50a and 50b is complicated, and the insulator, air layer and conductor are indented. There is a problem that the disturbance occurs.
[0012]
The present invention has been made in view of the above-mentioned problems of the prior art, and is capable of further reducing the diameter while reducing cost, ease of mounting on a cable, and preventing disturbance of the waveform of a high-frequency signal. To provide a cable connector and a cable connection method thereof.
[0013]
[Means for Solving the Problems]
A coaxial cable connector according to the present invention includes a center conductor, an inner coating that covers the outside of the center conductor, a shield wire that covers the outside of the inner coating, and an outer sheath that covers the outside of the shield wire. In order to achieve the above-mentioned object, the connector for coaxial cable connected and attached to the above has the following components.
(A) The inner and outer diameters of the metal material are integrally formed in a cylindrical shape that is uniform in the length direction and the outer diameter is the same as the diameter of the inner sheath of the coaxial cable. (B) a cylindrical surface of the center contact and an inner sheath of the coaxial cable connected to the center contact. Insulating coating material that covers the tip surface of the cylindrical surface in a cylindrical shape (c) Covers the surface of this inner portion of the coaxial cable adjacent to the portion covered with the insulating coating material in a cylindrical shape. Te fixedly attached, that the outside surface coaxial cable shielding wire tip portion covering made of a metallic material in contact as monkey Hib ferrule (d) the inner circumference of a metal material, in the longitudinal direction on the outer periphery both And the insulating coating material is integrally formed on the cylindrical such diameter, the ferrule portion covered with the shielded wire, the cover across the front end portion of the outer covering of the coaxial cable, and with the ferrule and the shield wire Corresponding parts are crimped from the outside and crimped to these ferrules and shield wires.
Further, the insulating coating material is formed by winding an insulating tape, or is formed by heat-treating a heat-shrinkable curable insulating tube, or heating / insulating a thermoplastic insulating tube. It has a configuration that is formed by cooling treatment.
[0015]
Further, the cable connection method of the coaxial cable connector of the present invention is a cable connection method of the coaxial cable connector in which the coaxial cable connector is connected to and attached to the tip of the coaxial cable, and includes the following steps. Features.
(A) The coaxial cable is inserted into the outer conductor of the connector for the coaxial cable, and the length of the central conductor, the length of the inner coating, and the length of the shield wire are respectively exposed at the tip of the coaxial cable. A coaxial cable terminal processing procedure in which the exposed portion of the shield wire is folded back to the outer sheath side of the coaxial cable after being processed to a predetermined length. (B) The exposed portion of the central conductor and the coaxial cable connector Center contact connection procedure for connecting the center contact (c) A ferrule attachment procedure for attaching and fixing the ferrule of the coaxial cable connector to a predetermined portion of the exposed portion of the inner coating (d) The coaxial cable connector is formed so as to cover the cylindrical surface and the tip end surface of the inner coating in a cylindrical shape. Insulation coating material forming procedure for forming edge coating material (e) The exposed portion of the shield wire is folded back from the folded state toward the ferrule side so as to uniformly cover the ferrule surface, and the insertion is performed. The outer conductor was moved in the direction toward the tip of the coaxial cable, and the outer conductor was stopped at a position covering the insulating coating material, the ferrule portion covered with the shield wire, and the outer coating. External conductor moving / fixing procedure in which the portion of the conductor that overlaps the ferrule is crimped from the outside, and the shield wire is sandwiched between the ferrule and external conductor, and the ferrule, shield wire, and external conductor are crimped and fixed. 0016
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the connector for a coaxial cable according to the present invention is integrally formed in a cylindrical shape with an inner diameter and an outer diameter that are both uniform in the length direction and the outer diameter is the same as the diameter of the inner sheath of the coaxial cable. Formed on one end side with a mating contact portion with a counterpart contact, and on the other end side with a coaxial conductor center conductor connection, a cylindrical surface of the center contact, and the center contact The insulation coating material that covers the cylindrical surface of the inner coating tip portion of the connected coaxial cable in a cylindrical shape and the portion of the inner coating of the coaxial cable that is adjacent to the portion covered with the insulation coating material. fixedly attached over the surface in a cylindrical shape, a metal material made of the ferrule in contact as monkey department the cover shield wire of the coaxial cable to the external surface, the inner circumference, the outer circumference of both a metal material Is integrally formed in a cylindrical shape having a uniform diameter is the direction the insulated covering material, the ferrule portion suffered shield wire, and covered over the front end portion of the outer covering of the coaxial cable, and correspond to the ferrule and the shield wire The portion to be crimped from the outside has a configuration and structure having an outer conductor which is crimped and fixed to these ferrule and shield wire.
[0017]
The insulating coating material is formed by wrapping an insulating tape or heat-treating a heat-shrink curable insulating tube or a thermoplastic insulating tube.
With this configuration and structure, the center contact is easy to make with a simple shape and structure, and the insulation coating can be easily formed by wrapping insulation tape or heat-treating the insulation tube. Thus, the cost of the entire connector can be reduced, and the coaxial cable can be easily attached to the coaxial cable as will be described later, and each of the center contact and the insulation coating material has a cylindrical shape having a substantially uniform diameter. Therefore, an insulator, a conductor, an air layer or the like does not enter the bumps, and it is possible to prevent disturbance of the waveform of the transmitted high frequency signal.
[0018]
The central contact has a cylindrical shape with a uniform diameter, and the insulating coating covering the center contact can be made very uniform with a uniform diameter comparable to the diameter of the ferrule and shield wire portion. There is no restriction on the reduction, and further reduction in diameter becomes easy.
[0019]
The connection and mounting method (cable connection method) of this coaxial cable connector to the coaxial cable is as follows.
First, the coaxial cable is inserted into the outer conductor, the end of the coaxial cable is processed, and the shield wire is folded back to the outer sheath side of the coaxial cable.
Next, the center contact is connected to the center conductor of the coaxial cable by soldering, crimping or the like, and a ferrule is attached and fixed to the inner sheath of the coaxial cable. Next, wrap the insulation tape or heat the insulation tube so that it covers the cylindrical surface of the center contact and the inner coating tip surface of the coaxial cable. The outer conductor is moved in the direction of the end of the coaxial cable by spreading back to the side and dispersing so as to uniformly cover the ferrule surface.
[0020]
Then, the outer conductor is stopped at a position covering the insulating coating material, the shield wire and the ferrule, and the outer sheath coating tip portion of the coaxial cable, and the portion corresponding to the shield wire and the ferrule of the outer conductor is crimped from the outside, and the shield The wire, ferrule, and outer conductor are crimped and fixed together.
[0021]
【Example】
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional side view and a front view showing an embodiment of a coaxial cable connector according to the present invention.
The coaxial cable connector of this embodiment is integrally formed of a metal material in a cylindrical shape, and has a coupling contact portion 12 coupled to and connected to a mating contact (pin) on one end side, and a coaxial cable on the other end side. The center contact 10 having the core wire connection portion 11 for connecting the 100 center conductors 101, the cylindrical surface of the center contact 10 and the tip end cylindrical surface of the inner sheath 102 of the coaxial cable 100 connected to the center contact 10 are straddled. A cylindrical covering and a portion of the inner covering 102 adjacent to the portion covered with the insulating covering member 20 are attached and fixed so that the surface of this portion is covered in a cylindrical shape, and a coaxial cable is attached to the outer surface. A metal ferrule 30 that comes into contact with the tip end portion of the shield wire 103 is covered with a metal material and is integrally formed in a cylindrical shape. The edge covering material 20, the ferrule 30 portion covered with the shield wire 103, and the end portion of the outer sheath 104 of the coaxial cable 100 are covered and the portion corresponding to the ferrule 30 and the shield wire 103 is crimped from the outside (41 In other words, the ferrule 30 and the shield conductor 103 are connected to and crimped to the outer conductor 40 to be fixed.
[0022]
The connection and mounting method (cable connection method) of the coaxial cable connector to the coaxial cable 100 is as follows, as shown in FIGS. First, as shown in FIG. 2A, the coaxial cable 100 is inserted into the outer conductor 40, and the end portion of the coaxial cable 100 is exposed to the length of the exposed central conductor 101, the length of the inner coating 102, and the shield. Processing is performed so that the length of the wire 103 becomes a predetermined length, and the exposed portion of the shield wire 103 is folded back to the exterior sheathing 104 side (coaxial cable terminal processing procedure).
[0023]
Next, as shown in FIGS. 2B and 2C, the center contact 10 is connected to the exposed portion of the center conductor 101 by soldering or the like, and a portion of the inner coating 102 that is slightly inserted from the tip portion is placed on the plate. A bent ferrule 30 is bent and wound and fixed (center contact connection / ferrule mounting procedure).
[0024]
Subsequently, as shown in FIGS. 2 (c) and 2 (d), the center contact 10 and the inner coating 102 are covered with a heat shrink-hardening insulating tube 20-T and heat-treated, and the cylindrical surface of the center contact 10 and The insulating coating material 20 is formed so as to cover the front end portion of the inner coating 102 (so as not to cover the ferrule 30) in a cylindrical shape (insulating coating material forming procedure).
[0025]
Next, as shown in FIG. 2 (e), the shield wire 103 is folded back to the ferrule side so as to uniformly cover the surface of the ferrule 30, and the outer conductor 40 is moved toward the distal end of the coaxial cable 100. 2 (f) and FIG. 1, the outer conductor 40 is stopped at a position covering the insulating coating material 20, the shield wire 103 and the ferrule 30, and the outer sheath 104, and the outer conductor 40 is shielded. The portion overlapping (corresponding) with the wire 103 and the ferrule 30 is crimped from the outside, and the shield wire 103 is sandwiched between the ferrule 30 and the outer conductor 40 so as to be crimped and fixed to each other (outer conductor moving / fixing procedure). .
[0026]
In the procedure of FIG. 2, the example in which the insulating coating material 20 is formed by heat-treating the heat-shrinkable curable insulating tube 20 -T is shown. However, the thermoplastic insulating tube is heated and cooled. It may be formed, or may be formed by wrapping an adhesive insulating tape. The center contact 10 may be formed in a cylindrical shape by rounding a plate-like one by press working.
[0027]
By adopting such a configuration, structure, and cable connection method, the center contact 10 is easy to manufacture with a simple cylindrical shape and structure having a substantially uniform diameter, and the insulating coating material 20 is also wrapped with insulating tape, Since it can be easily formed by heat treatment or the like of the insulating tube, these costs and the cost of the entire connector can be reduced, and connection to and attachment to the coaxial cable 100 is extremely easy. In addition, since the center contact 10 and the insulating covering material 20 as well as the outer conductor 40 are cylindrical shapes having substantially uniform diameters, insulators, conductors, air layers, and the like are bumpy as in the conventional example. The dielectric constant and the like can be kept constant, and the waveform of the high-frequency signal to be transmitted can be prevented from being disturbed.
[0028]
In addition, the thickness of the insulating covering material 20 covering the cylindrical surface of the center contact 10 can be arbitrarily set by selecting the thickness and number of layers of the insulating tape, the thickness of the insulating tube, the diameter before processing, and the like. Since it is very easy to adjust the diameter of the insulating coating material 20 to the diameters of the ferrule 30 and the shield wire 103, there is no restriction on the diameter reduction by the central contact 10 and the insulating coating material 20, and a further smaller diameter. Can be easily realized.
[0029]
【The invention's effect】
As described above, the present invention is a center which is integrally formed of a metal material in a cylindrical shape and has a connecting contact portion with a counterpart contact on one end side and a connecting portion with a central conductor of a coaxial cable on the other end side. Connect the center conductor of the coaxial cable that has been terminated to the contact, and form an insulation covering material that covers the cylindrical surface of the center contact and the tip of the inner surface of the coaxial cable in a cylindrical shape with insulating tape or tube Then, attach the ferrule to the portion of the inner coating of the coaxial cable adjacent to the insulation coating and uniformly distribute and contact the shield wire so as to cover the surface of the insulation coating, ferrule and shield wire, and coaxial cable. By adopting a configuration, structure, and cable connection method in which an outer conductor integrally formed in a cylindrical shape with a metal material is provided so as to cover the front end portion of the outer sheath. Cylindrical simple shape and structure each having a uniform diameter for the center contact and the insulation coating material, which is easy to manufacture and form, and can reduce the cost of the entire connector including these, and also the coaxial cable The center contact, the insulation coating material, and the outer conductor are cylindrical with a uniform diameter, so that the waveform of the transmitted high-frequency signal can be prevented from being disturbed. In addition, the thickness of the insulation coating material can be arbitrarily set and formed, and its diameter can be easily matched to the diameter of the ferrule and shield wire portion, so that there is a restriction on the diameter reduction by the center contact and the insulation coating material However, there is an effect that it is easy to further reduce the diameter.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view and a front view showing an embodiment of a coaxial cable connector of the present invention.
2 is a diagram showing a mounting procedure for explaining a connection and mounting method of the coaxial cable connector shown in FIG. 1 to the coaxial cable.
FIG. 3 is a sectional side view showing an example of a conventional coaxial cable connector.
4 is a view showing a mounting procedure for explaining a method of connecting and mounting the coaxial cable connector shown in FIG. 3 to the coaxial cable. FIG.
[Explanation of symbols]
10, 10x Center contact 11, 11x Core wire connection part 12, 12x Joining contact part 13 Connection conductor 20 Insulation coating material 20-T Insulation tube 30, 30x Ferrule 40, 40x Outer conductor 41, 41x Crimp part 50a, 50b Insulation lid 55 Adhesive tape 100 Coaxial cable 101 Center conductor 102 Inner coating 103 Shielded wire 104 Exterior coating

Claims (5)

A connector for a coaxial cable connected to and attached to the tip of a coaxial cable comprising a central conductor, an inner sheath covering the outer side of the central conductor, a shield wire covering the outer side of the inner sheath, and an outer sheath covering the outer side of the shield wire A coaxial cable connector having the following configurations.
(A) The inner and outer diameters of the metal material are integrally formed in a cylindrical shape that is uniform in the length direction and the outer diameter is the same as the diameter of the inner sheath of the coaxial cable. (B) a cylindrical surface of the center contact and an inner sheath of the coaxial cable connected to the center contact. Insulating coating material that covers the tip surface of the cylindrical surface in a cylindrical shape (c) Covers the surface of this inner portion of the coaxial cable adjacent to the portion covered with the insulating coating material in a cylindrical shape. Te fixedly attached, that the outside surface coaxial cable shielding wire tip portion covering made of a metallic material in contact as monkey Hib ferrule (d) the inner circumference of a metal material, in the longitudinal direction on the outer periphery both And the insulating coating material is integrally formed on the cylindrical such diameter, the ferrule portion covered with the shielded wire, the cover across the front end portion of the outer covering of the coaxial cable, and with the ferrule and the shield wire Corresponding parts are crimped from the outside and crimped to these ferrules and shield wires.   The coaxial cable connector according to claim 1, wherein the insulating coating material is formed by winding an insulating tape.   The coaxial cable connector according to claim 1, wherein the insulating coating material is formed by heat-treating a heat-shrinkable and curable insulating tube.   The coaxial cable connector according to claim 1, wherein the insulating coating material is formed by heating and cooling a thermoplastic insulating tube. A cable connection method for a coaxial cable connector in which the coaxial cable connector according to claim 1 is connected to and attached to the tip of the coaxial cable, and includes the following steps: .
(A) The coaxial cable is inserted into the outer conductor of the connector for the coaxial cable, and the length of the central conductor, the length of the inner coating, and the length of the shield wire are respectively exposed at the tip of the coaxial cable. A coaxial cable terminal processing procedure in which the exposed portion of the shield wire is folded back to the outer sheath side of the coaxial cable after being processed to a predetermined length. (B) The exposed portion of the central conductor and the coaxial cable connector Center contact connection procedure for connecting the center contact (c) A ferrule attachment procedure for attaching and fixing the ferrule of the coaxial cable connector to a predetermined portion of the exposed portion of the inner coating (d) The coaxial cable connector is formed so as to cover the cylindrical surface and the tip portion surface of the inner coating in a cylindrical shape. Insulation coating material forming procedure for forming an edge coating material (e) The exposed portion of the shield wire is folded back from the folded state toward the ferrule side so as to uniformly cover the ferrule surface, and the insertion is performed. The outer conductor was moved in the direction toward the tip of the coaxial cable, and the outer conductor was stopped at a position covering the insulating coating material, the ferrule portion covered with the shield wire, and the outer coating. External conductor moving / fixing procedure in which a portion of the conductor that overlaps the ferrule is crimped from the outside, and the shield wire is sandwiched between the ferrule and the external conductor, and the ferrule, shield wire, and external conductor are crimped and fixed.

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