JPH0753274Y2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a connector for connecting a coaxial cable in which a flexible inner conductor is wound around a central core to another member.

<Prior Art> Conventionally, there is a coaxial cable shown in FIG. 4 as a coaxial cable used in a roadside communication system for providing road information on a highway or the like. This coaxial cable K is generally called a spiral coaxial cable, and includes a flexible inner conductor 50 and an outer conductor 51. The flexible inner conductor 50 is made of annealed copper wire and wound in a horizontal winding around a central core 52 made of a magnetic material (ferrite) extended in the axial direction. The outer conductor 51 is formed of a mixed woven braid of annealed copper wire and cotton yarn, and is wound around the inner conductor 50 via an insulator 53 made of polyethylene. The periphery of the outer conductor 51 is covered with an outer casing 54 made of black polyethylene.

The spiral coaxial cable K serves as a transmitting antenna. That is, the spiral coaxial cable K
Radiates magnetic flux to the outside along the longitudinal direction by magnetic field coupling, and locally provides information (road information etc.) by the induced electromagnetic field generated. for that reason,
The flexible inner conductor 50 made of annealed copper wire is wound in a horizontal winding around the central core 52 made of a magnetic material without weaving, and the outer conductor 51 is made of a mixed woven braid of annealed copper wire and cotton yarn so that the magnetic flux is external. It has a structure that allows easy leakage.

A connector (not shown) is used to connect the spiral coaxial cables K to each other or to connect the spiral coaxial cable K to another member. This connector has almost the same structure as a general coaxial cable connector. However, the inner conductor 50 is flexible and the central core
Since the structure is wound around 52, the internal conductor 50 and other members cannot be connected by using a crimp terminal which can be easily attached. Therefore, the conventional connector has a structure in which the internal conductor connection terminal is attached to the internal conductor by soldering.

<Problems to be Solved by the Invention> By the way, in such a spiral coaxial cable connector, a soldering process is required for the mounting work, which makes the mounting work cumbersome. In addition, the construction sites where connectors are frequently installed are road edges and the upper part of electric poles, and there are many places where there is no power source.Therefore, prepare a power source such as a generator necessary for soldering, It was very inconvenient because I had to do the connector installation work.

Furthermore, since the mounting work must be performed at an unstable construction site, soldering tends to be uncertain, which in turn causes deterioration of electrical characteristics.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a connector that is easily and reliably attached to a coaxial cable.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a coaxial cable having a flexible inner conductor wound around a central core extended in the axial direction and other members. Which has an inner conductor contact consisting of a contact body and a contact screw, and the contact body has a tubular fitting portion at its base end, and the tubular fitting portion is the center. The contact screw is inserted into the gap between the core and the flexible inner conductor and fitted to the tip of the central core. The contact screw is externally screwed to the contact body to crimp the flexible inner conductor to the contact body. The connector was constructed from the above.

<Operation> According to the above configuration, when the contact screw is screwed onto the contact body, the flexible inner conductor attached to the outer periphery of the base end portion of the contact body is crimp-connected to the contact body. .

<Embodiment> Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a partially cutaway side view of a connector according to an embodiment of the present invention. The spiral coaxial cable connected by the connector has been described in the conventional example, the same parts are designated by the same reference numerals, and detailed description thereof is omitted.

The connector 1 includes a contact portion 2 and an exterior portion 3. The contact part 2 comprises an inner conductor contact 4 connected to a flexible inner conductor 50. The inner conductor contact 4 comprises a contact body 5 and a contact screw 6. The contact body 5 has a tubular fitting portion 5a at its base end. Inner hole 7 formed in the tubular fitting portion 5a
Has the same diameter as the central core 52 of the spiral coaxial cable K. Further, the inner side surface in the axial direction of the tubular fitting portion 5a is a crimp taper surface 5b. Furthermore, the contact body 5
A male screw portion 5c is provided at the central portion in the axial direction of. The contact body 5 has the annular fitting portion 5a inserted from the tip of the spiral coaxial cable K between the central core 52 and the flexible inner conductor 50, and is fitted to the tip of the central core 52. The end of the flexible inner conductor 50 separated from the central core 52 is abutted on the outer peripheral surface of the tubular fitting portion 5a, and its tip reaches the crimping tapered surface 5b.

On the other hand, the contact screw 6 is made of an annular member, and a fitting portion 6a is provided on one end side of the inner surface thereof. This mating part 6a
Has an inner diameter equal to the outer diameter of the tubular fitting portion 5a. A crimping taper surface 6b is provided on the inner side in the axial direction of the fitting portion 6a. Further, on the other end side of the inner surface of the connector screw 6, a female screw portion 6c corresponding to the above-mentioned male screw portion 5c is provided.

As shown in FIG. 2, the contact screw 6 is externally fitted to the contact body 5 and screwed. Then, the contact screw 6 is firmly screwed to the contact body 5, so that the pressure-bonded tapered surfaces 5b and 6b come into pressure contact with each other,
The flexible inner conductor 50 attached to the pressure-bonding taper surface 5b is pressure-bonded to the contact body 5 to electrically connect them.

Further, the contact portion 2 is provided with an annular clamp 8 and an annular nut 9. The annular clamp 8 is fitted onto the end of the spiral coaxial cable K. The outer conductor 51 is expanded radially outward along the end 8a of the annular clamp 8. The annular nut 9 is provided with a male screw portion 9a at the center of the outer peripheral surface thereof, and is externally fitted inside the spiral coaxial cable K in the axial direction. A gasket 10 made of insulating rubber and a washer 11 are interposed between the annular clamp 8 and the annular nut 9.

On the other hand, the exterior part 3 includes an exterior shell 20. The outer shell 20 has a male screw portion of the annular nut 9 on the inner peripheral surface on one end side thereof.
A female screw portion 20a corresponding to 9a is provided. A coupling 21 is attached to the other end of the exterior shell 20 for coupling with another connecting member. Further, an insulator 22 made of an insulating material such as Teflon rubber is fitted inside the outer shell 20. The insulator 22 is composed of an outer insulator 22A and an inner insulator 22B. The outer insulator 22A has a press-fitting hole 23, which is slightly smaller in diameter than the tip side diameter of the contact body 5, at the center thereof, and has an O-ring 24 at the outer and inner circumferences.
Is attached. An annular pad 25 is fitted between the inner insulator 22B and the inner peripheral surface of the outer shell 20 at the end thereof.

The contact portion 2 and the exterior portion 3 having the above structures are integrally engaged. In other words, the tip of the contact body 5 moves from the inside of the exterior shell 20 to the outside insulator.
While being press-fitted into the press-fitting hole 23 of 22A, the male screw portion 9a of the annular nut 9 is screwed and fixed to the female screw portion 20a of the exterior shell 20 to integrally connect the contact portion 2 and the exterior portion 3. Then, the annular nut 9 is firmly screwed to the outer shell 20, whereby the annular clamp 8 is pressed against the pad 25, and the end surface 8a of the annular clamp 8 is pressed.
The outer conductor 51, which is expanded along with, is crimped to the backing metal 25. As a result, the outer conductor 51 and the pad 25 are electrically connected to each other, and thus the outer conductor 51 and the exterior shell 20 are electrically connected.
Further, since the outer shell 20 is electrically connected to the coupling 21, the outer conductor 51 has a pad 25, an outer shell 2
0, it will be connected to another member (not shown) via the coupling 21.

In the connector 1 of the above embodiment, the internal conductor contact 4 has a male shape, but it goes without saying that the connector 1 having a female internal conductor contact corresponding to the male shape can also be used.

<Effect of the Invention> As described above, according to the present invention, the contact main body and the flexible inner conductor can be electrically connected only by screwing the contact screw to the contact main body. Therefore, the complicated work of connecting the inner conductor and the inner conductor contact by soldering as in the past is not required, and the connector mounting work is simplified.

In addition, the internal conductor was press-fitted to the contact body by screwing between the contact body and the contact screw, thus ensuring the connection. Therefore, the coaxial cable can be connected to other members without deteriorating the electrical characteristics.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention. FIG. 1 is a partially cutaway side view of a connector, FIG. 2 is a partially cutaway side view showing a connecting part of a contact portion, and FIG. It is a partially notched perspective view of a contact part. FIG. 4 is a sectional view of a spiral coaxial cable in which the connector of the present invention is used. 1 ...... Connector 4 ...... Inner conductor contact 5 ...... Contact body 5a ...... Cylindrical fitting part 6 ...... Contact screw 50 ...... Flexible inner conductor 52 ...... Central core K ...... Spiral coaxial cable (coaxial cable )

Claims (1)

[Scope of utility model registration request] 1. A connector for connecting a coaxial cable (K) having a flexible inner conductor (50) wound around an axially extending central core (52) to another member. , An inner conductor contact (4) consisting of a contact body (5) and a contact screw (6), and the contact body (5) has a tubular fitting portion (5a) at its proximal end, The tubular fitting portion (5a) is inserted into the gap between the central core (52) and the flexible inner conductor (50) and fitted to the tip of the central core (52). ) Is a connector which is externally fitted and screwed to the contact body (5) to crimp the flexible inner conductor (50) to the contact body (5).