JP2595351Y2 - Coaxial 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 coaxial connector used at the end of a coaxial cable.

[0002]

2. Description of the Related Art As a coaxial connector of this type, the one shown in FIG. 2 is well known as a conventional example. This coaxial cable 1 has a center conductor 2 disposed in the center as is well known,
The outside of the center conductor 2 is covered with an insulator, and an outer conductor 3 knitted with fine wires is provided on the outer peripheral surface of the insulator, and the outer peripheral surface of the outer conductor 3 is covered with a tubular outer skin. is there.

In the conventional coaxial connector 4 attached to the coaxial cable 1 having such a configuration, an insulator 7 having a center pin 8 arranged concentrically is inserted into a grounding fitting 6 and fitted to the outer periphery of the grounding fitting 6. And an auxiliary ring 9 fitted around the outer periphery of the tapered enlarged diameter portion 6d on the distal end side of the earth metal fitting 6.

[0004]

In order to achieve the above object, the present invention provides a flexible antenna having a coiled antenna element having a base end connected to a metal fitting. A core rod made of an insulating material that fits into the coiled antenna element, and is formed in a series extending from the distal end of the coiled antenna element, and is bent from the distal end to the base end side to be positioned inside the coiled antenna element. An auxiliary antenna element to be provided, a gap portion is formed in the core rod substantially in the axial direction from the tip to an intermediate predetermined position, and the gap portion has a diameter substantially corresponding to the outer diameter of the auxiliary antenna element. The inner surface in the gap and the outer peripheral surface of the auxiliary antenna element are frictionally engaged with each other and are held in a fixed state.

[0005]

In such a conventional coaxial connector 4, it is inevitable that a load such as a twist is applied in addition to the insertion / extraction force, when the insertion / removal operation is performed on the mating socket to which the conventional coaxial connector 4 is connected. The assembly of the auxiliary ring 9 is indispensable to suppress the expansion of the enlarged diameter portion 6d due to the load, to improve the stability at the time of insertion and extraction, and to maintain the contact force. However, the existence of the separate auxiliary ring 9
Not only does the number of parts increase, which leads to an increase in cost and troublesome storage and management of the parts.
However, there is a problem that workability at the time of assembling is also deteriorated. SUMMARY OF THE INVENTION An object of the present invention is to provide a coaxial connector which solves the conventional problems, reduces the number of required parts, reduces cost, and facilitates storage and management of parts and good workability during assembly. .

[0006]

According to the present invention, in order to achieve the above object, an insulator having a center pin arranged concentrically is inserted into a grounding fitting, and a cover fitted to the outer periphery of the grounding fitting is provided. In the coaxial connector attached to the end of the coaxial cable, the diameter of the opening of the grounding metal is enlarged to form a tapered enlarged portion, and the tapered enlarged portion is formed.
Of the cover over the outer circumference at a substantially intermediate position on the outer circumference of the cover.
The inner edge of the open end is abutted.

The core rod 11 is made of a tapered insulating material having a circular cross section, such as polyacetal resin.
Only the base end portion 11a has a uniform circular cross section or a male screw (not shown) engraved on the outer periphery, and a circular hole-shaped space 11b having a diameter substantially corresponding to the outer diameter of the auxiliary antenna element 16 in a concentric arrangement.
(Gap), and the gap 11b is substantially continuous in the axial direction from the tip to a predetermined intermediate position.

FIG. 2 is a perspective view showing the antenna element.
The antenna element 13 includes a coil-shaped antenna element 14 and a coil-shaped antenna element 14 that is formed in a series extending from the distal end of the coil-shaped antenna element 14 and bent from the distal end toward the base end 15. And a straight auxiliary antenna element 16 located on the inside. In such an auxiliary antenna element 16, the inner surface of the gap 11b of the core rod 11 and the outer peripheral surface of the auxiliary antenna element 16 are frictionally engaged and held in a fixed state. Further, the coiled antenna element 14 stops on the outer periphery of the core rod 11 and is fitted in a spring state, and the base end portion 15 has a linear portion 15a and an arc-shaped portion 15b integrally,
This base end 165 is connected to the fitting 20.

The coaxial connector 4 attached to the end of the coaxial cable 1 has a cylindrical cover 5 having a circular cross section, a substantially cylindrical grounding member 6 and a grounding member 6 inserted into the grounding member 6 as in the conventional example. This has an insulator 7 and a center pin 8 arranged concentrically on the insulator 7, but the auxiliary ring 9 in the conventional example is omitted.

In other words, in order to omit the auxiliary ring 9 in the conventional example, the cover 5 has its open end extended to an intermediate position of the enlarged diameter portion 6d at the enlarged distal end of the earth metal fitting 6, and the distal end thereof. The inner edge 5d is left square without being chamfered. The inner edge 5d is in contact with the outer periphery of the enlarged diameter portion 6d at the substantially central position in the axial direction of the enlarged diameter portion 6d over the entire circumference.

In the illustrated embodiment, the inner edge 5d is the enlarged diameter portion of the enlarged diameter portion 6d and the ground metal 6
Is continuously in contact with the outer periphery of the entire circumference, but is not limited to this, chamfering is performed at a plurality of locations at intervals in the circumferential direction, and therefore, the portion not chamfered is divided into a plurality of portions in the circumferential direction. It may be provided at a location and abut on the outer periphery of the enlarged diameter portion 6d of the earth metal fitting 6, and it is also possible to slightly chamfer the entire periphery.

In any case, the cover 5 may be formed so that the edge 5c on the opening side is slightly longer, that is, the inner edge 5d reaches the outer periphery of the enlarged diameter portion 6d side of the earth metal fitting 6 and comes into contact therewith. is there.

As described above, the coaxial connector 4 according to the present invention is attached to the coaxial cable 1 by first inserting the coaxial cable 1 through the cover 5 and then connecting the center conductor 2 to the coaxial cable 1. After being fitted and fitted to the center pin 8 and inserting the insulator 7 into the earth metal fitting 6 from the enlarged diameter portion 6d side, the center pin 8 is pressed into the insulator 7 and the clamp part 6a of the earth metal fitting 6 is connected to the external conductor 3. The metal fitting 6 is fixed to the coaxial cable 1 by being brought into contact with the outer peripheral surface of the coaxial cable 1 and caulking.

[0014]

As described above, according to the present invention, a gap having a diameter substantially corresponding to the outer diameter of the auxiliary antenna element is formed, and the inner surface in the gap and the outer peripheral surface of the auxiliary antenna element are frictionally engaged. By maintaining the fixed state, the required number of parts is reduced, assembly and mass production become easy, and the arrangement of the auxiliary antenna element is maintained in a stable state, so that the transmission and reception stability is maintained. In addition, there is an effect that reliability can be improved.

In this mounting or assembling operation, it is only necessary to tighten the clamp portion 6a of the earth metal fitting 6 and shift the cover 5 to the tip end side. Since it is not necessary, workability is improved, and the number of required parts is reduced, so that parts management becomes easy.

When the coaxial connector 4 attached to the coaxial cable 1 is used, for example, when it is inserted into or removed from a socket or the like, even if a twisting action is applied, the coaxial connector 4 reaches the outer periphery of the enlarged diameter portion 6d and the position of the enlarged diameter portion 6d. The contact between the extended end 5c of the cover 5 and the inner edge 5d maintains the predetermined elasticity in an appropriate state without deformation of the end of the earth metal fitting 6 on the side of the enlarged diameter portion 6d. Therefore, the holding force can be prevented from being reduced.

[0017]

As described above, in the coaxial connector according to the present invention, the diameter of the opening of the earthing metal fitting, which is a component of the coaxial connector, is enlarged to form a tapered enlarged portion. By contacting the inner edge of the open end of the cover that fits with the outer periphery of the tapered large-diameter portion, the twisting action imparted at the time of insertion and withdrawal can be achieved without using a conventionally used auxiliary ring. In contrast, the inner edge of the abutting cover presses and protects the enlarged-diameter portion from the outside, maintains the proper elasticity without deforming the open end of the grounding metal, and always connects in the proper state Is performed, the number of parts can be reduced, the parts can be easily managed, and the assembling work can be remarkably facilitated. As a result, an excellent effect can be achieved in that the cost is reduced and the insertion / extraction force is improved and stabilized. .

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a coaxial connector according to an embodiment of the present invention.

FIG. 2 is a side sectional view showing a conventional coaxial connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coaxial cable 2 Center conductor 3 Outer conductor 4 Coaxial connector 5 Cover 5a Depression 5b Step 5c Extended opening side end 5d Inner edge 6 Grounding metal 6a Clamp 6b Stopper piece 6c Rear end 6d Large diameter section 7 Insulator 8 Center pin

Claims (1)

(57) [Scope of request for utility model registration] 1. A coaxial connector attached to an end of a coaxial cable, comprising: an insulator having a center pin arranged concentrically, inserted into an earth metal fitting, and a cover fitted to an outer periphery of the earth metal fitting. The diameter of the opening side of the metal fitting is widened so as to form a tapered enlarged portion.
The cover is opened over the outer periphery at a substantially intermediate position in the outer periphery.
A coaxial connector wherein the inner edge of the mouth end abuts.