JPH05347170A - Coaxial connector - Google Patents

Abstract

PURPOSE:To reduce the man-hour for assembling and connecting with coaxial cables, and the number of parts. CONSTITUTION:A coaxial cable 20 comprises a central contact 2 connected to the central conductor 22 of the coaxial cable 20, an outer contact 1 connected to an outer conductor 23 of the coaxial cable 20 and an inner insulator 3. The outer contact 1 has contact blades 11 for piercing the covering 24 of the coaxial cable 20 and mating contact with the outer conductor 23 positioned inside the covering 24, therefore the outer conductor 23 can be connected to the outer contact 1 without removing the covering 24.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a coaxial connector.

[0002]

2. Description of the Related Art A coaxial connector is composed of, for example, a center contact connected to a center conductor of a coaxial cable, an outer contact also connected to an outer conductor, and an internal insulator arranged therebetween. It has been known. The wiring process (mounting process) between the coaxial connector and the coaxial cable is shown in FIG. That is, first, as shown in FIG. 5A, the outer jacket 24 of the coaxial cable 20 is removed by a predetermined length to expose the outer conductor 23, and as shown in FIG. Made sleeve 4
Insert. The metal sleeve 4 is used to supplement the strength of the inner sheath of the coaxial cable having a low mechanical strength at the time of caulking, which will be described later, to ensure the electrical connection between the outer contact 1 and the outer conductor 23.

Then, the end portion of the outer conductor 23 is folded back to the side of the metal sleeve 4 ((c) in the figure) and the end portion of the outer conductor 23 is trimmed by cutting the excess portion. Then, the central contact 2 is connected to the exposed central conductor 21 by removing the end portion of the inner cover 22 by crimping or the like ((d) of the same figure). The internal insulator 3 is put on and attached to the connection portion and its periphery (FIG. 2E), and the external contact 1 is put on the internal insulator 3 from the top (FIG. 2F). Finally, the portion 12 of the outer contact 1 located on the metal sleeve 4 is crimped inward together with the metal sleeve 4. The caulking makes a structure for electrically and mechanically connecting the outer conductor 23 and the outer conductor 23 sandwiched between the metal sleeve 4 and the outer contact 1.

[0004]

However, in the above-mentioned conventional coaxial connector, in order to electrically connect the outer contact of the coaxial connector to the outer conductor of the coaxial cable, a metal sleeve is attached, or the outer conductor is folded back and the end portion is folded. Arrange,
Alternatively, a complicated process such as caulking this metal sleeve with an external contact is required. Therefore, the process of assembling and connecting the coaxial connector is complicated and the number of steps is large.

Further, a metal sleeve must be used in order to supplement the strength of the inner cover of the coaxial cable having a low mechanical strength at the time of crimping, which causes a problem that the number of parts required for mounting the coaxial connector increases. ..

Therefore, the object of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to reduce the number of assembling and connecting processes, and also to reduce the number of parts of the coaxial connector to reduce the unit cost of the single connector. , To provide a coaxial connector.

[0007]

According to the present invention, there is provided a coaxial connector comprising a center contact connected to a center conductor of a coaxial cable and an outer contact connected to an outer conductor of the coaxial cable. A coaxial connector is obtained in which the outer contact is provided with a contact blade that pierces the jacket of the coaxial cable and contacts the outer conductor. The contact blade has an appropriate shape that can bite into the outer cover of the coaxial connector, specifically, a triangular shape or a wavy shape,
For example, these may be continuous in a sawtooth shape. The external contact may have an open barrel structure with one side surface opened.

[0008]

In the coaxial connector of the present invention, the outer blade of the coaxial cable is pierced by the contact blade of the outer contact to electrically connect the outer contact and the outer conductor of the coaxial cable. Therefore, the outer conductor and the outer contact can be electrically connected without removing the outer sheath of the coaxial cable, and the number of wiring steps can be reduced.

When the electrical connection between the external contact and the external conductor is directly obtained by the contact blade, unlike the conventional caulking method, a large mechanical strength is not required on the coaxial cable side. Therefore, it is not necessary to reinforce with a metal sleeve as in the conventional case, and the number of parts can be reduced.

Further, since the external contact has an open barrel structure, positioning with the external contact in the axial direction of the coaxial cable becomes easy, and the contact blade is provided, for example, so as to project in a direction perpendicular to the axial direction of the external contact. However, it is possible to easily perform the assembly and connection work with the coaxial cable.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an external contact 1 used in the coaxial connector of the first embodiment of the present invention. The external contact 1 has an open barrel structure with an opened side surface, which is formed by bending a metal plate into a substantially cylindrical shape, for example. One of the external contacts 1, that is, FIG.
At the inner end of the opening in front of the
1 are formed at predetermined intervals.

Each of the contact blades 11 is formed at an end portion which is perpendicular to the axial direction of the external contact 1 and which is opposite to the mating side with the mating connector. Further, the height of the contact blade 11 is larger than the thickness of the jacket 24 of the coaxial cable 20 to which the coaxial connector of the embodiment is attached, and is formed to a size that does not reach the center conductor 24 of the coaxial cable 20 after the connection described later. Has been done. Although the illustrated contact blade 11 is a substantially triangular protrusion, the contact blade 11 is not limited to this and may have, for example, a wavy shape.

Next, the process of connecting the coaxial connector of FIG. 1 to the coaxial cable will be described with reference to FIGS. First, as shown in FIG. 2A, the outer cover 24 of the coaxial cable 20 and the outer conductor 23 are removed by an appropriate length to expose the inner cover 22. The inner cover 22 is removed by a predetermined length to expose the inner conductor 21, and then the center contact 2 is connected to the inner conductor 21 by crimping ((b) in the same figure). Incidentally, as a method of connecting the center contact 2 to the internal conductor 21, it is of course possible to use a method such as pressure welding or soldering, in addition to this pressure bonding.

Next, the center contact 2 and the inner conductor 21
The inner insulator 32 is put over the connection portion and its periphery and the like to assemble (FIG. 11C) to protect the connection portion and the like. Finally, the outer contact 1 is covered over the inner insulator 32, and the contact blade 11 provided on the outer contact 1 is bited over the outer cover 24 of the coaxial cable 20 to separate the outer contact 1 and the outer conductor 23. Connect them by connecting them ((d) in the figure).

The process of biting the outer contact 1 into the outer cover 24 and connecting it to the outer conductor 23 will be described in more detail with reference to FIG. That is, the outer contact 1 is placed on the lower die 7 of the connection tool with the external contact 1 opened as shown and the contact blade 11 facing upward. The upper side 21 of the connection tool
Are positioned above them, and the external contact 1 is positioned between the upper die 6 and the lower die 7. Then, in this state, the coaxial cable 20 processed as shown in FIG. 2C is inserted inside the opening of the external contact 1. At this time,
The coaxial cable 20 is preferably positioned by a positioning means (not shown).

Next, the upper die 6 is lowered and the like, and the upper portion of the opening of the external contact 1 is pushed by the upper die 6. This reduces the outer diameter of the outer contact 1, and at the same time, the contact blade 11 provided on the outer contact 1 bites into the inside of the coaxial cable 20. At that time, since the height of the contact blade 11 is larger than the thickness of the jacket 24 of the coaxial cable 20 as described above, the contact blade 11 and the outer conductor 23 come into contact with each other, and the outer contact 1 and the outer conductor 23 are electrically connected. It will be connected to and wired.

Although the contact blade 11 is provided at the end of the outer contact 1 in FIG. 1, the present invention is not limited to this.
For example, like the external contact 1 of the second embodiment shown in FIG. 4, the contact blade 11 may be provided in the middle of the cylinder of the external contact 1. That is, if it is a position where it can break through the jacket 24 of the coaxial cable 20 and come into contact with the outer conductor 23 located inside thereof, specifically, the contact portion 12 with the portion of the coaxial cable 20 provided with the jacket 24, The blade 11 may be provided anywhere.

[0018]

As described above, the coaxial connector of the present invention has a structure in which the outer contact is provided with the contact blade that pierces the jacket of the coaxial cable and contacts the outer conductor. In this case, it is possible to save the troublesome work such as mounting a metal sleeve. Therefore, it is possible to significantly reduce the number of wiring steps. It is also possible to eliminate the metal sleeve for ensuring the electrical connection between the outer conductor and the outer contact of the coaxial cable. Therefore, the cost of the coaxial cable can be reduced.

Further, when the external contact has an open barrel structure, it is easy to position the external contact in the axial direction of the coaxial cable, and the work of assembling and connecting with the coaxial cable can be easily performed.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a state before connection of an external contact used in a coaxial connector of a first embodiment of the present invention.

2 (a) to (d) are explanatory views of a process of connecting a coaxial connector and a coaxial cable according to the first embodiment.

FIG. 3 is an explanatory diagram of a method of connecting the external contact and the external conductor of the coaxial cable in the coaxial connector of the first embodiment.

FIG. 4 is an explanatory diagram of external contacts used in the coaxial connector of the second embodiment of the present invention.

5A to 5F are explanatory views of a process of connecting a conventional coaxial connector to a coaxial cable.

[Explanation of symbols]

 1 Outer Contact 2 Center Contact 3 Inner Insulator 4 Metal Sleeve 11 Contact Blade 21 Center Conductor 22 Inner Cover 23 Outer Conductor 24 Outer Cover 6 Upper Mold 7 Lower Mold

Claims (2)

[Claims] 1. A coaxial connector comprising a center contact connected to a center conductor of a coaxial cable and an outer contact connected to an outer conductor of the coaxial cable, wherein the outer contact covers a jacket of the coaxial cable. A coaxial connector comprising a contact blade that breaks through and contacts the outer conductor. 2. The coaxial connector according to claim 1, wherein the outer contact has an open barrel structure.