CN111146602A

CN111146602A - Different pitch type coaxial cable termination structure

Info

Publication number: CN111146602A
Application number: CN201911301174.0A
Authority: CN
Inventors: 肖顺群
Original assignee: Shanghai Aerospace Science and Industry Appliance Co Ltd
Current assignee: Shanghai Aerospace Science and Industry Appliance Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-05-12

Abstract

A differential pitch coaxial cable termination structure comprising a cable body comprising a first outer conductor and a first inner conductor; a first inner conductor is coaxially arranged inside the first outer conductor; the first outer conductor is electrically insulated from the first inner conductor; the second inner conductor is in electrical contact with the first inner conductor, and the first outer conductor is in electrical contact with the second outer conductor; the first outer conductor is provided with an outer thread groove, the inner wall of the second outer conductor is provided with an inner thread groove, and the outer thread groove is matched with the inner thread groove; the external thread groove; according to the connector, the first outer conductor and the second outer conductor can be in interference connection by means of different thread pitches, so that the connection strength between the connector and the cable is effectively improved, and the outer conductor of the connector and the inner conductor of the cable are prevented from loosening and generating gaps.

Description

Different pitch type coaxial cable termination structure

Technical Field

The invention belongs to the technical field of communication connectors, and particularly relates to a different-pitch coaxial cable termination structure.

Background

The coaxial cable is a cable which is provided with two concentric conductors, and the conductor and the shielding layer share the same axis; most common coaxial cables consist of copper conductors separated by an insulating material, outside the inner insulating material there is another layer of annular conductor and its insulator, then the whole cable is covered by a sheath of polyvinyl chloride or teflon material;

present coaxial cable is when with coaxial connector, consuming time is very long, need aim at and insert, the operation precision is limited, and simple plug connection structure can lead to the joint strength of cable and connector not high, and the grafting department easily takes off, receives external environment interference easily, and when joint strength is not high, the clearance increase and decrease between the first outer conductor of cable and the second outer conductor of connector, shielding effect reduces, and the signal difference between first outer conductor and the second outer conductor will increase, leads to three intermodulation at last to increase.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a different-pitch coaxial cable termination structure, and the specific technical scheme is as follows:

the different pitch type coaxial cable termination structure comprises a cable main body and a connector main body; the cable main body is assembled and connected with the connector main body; the cable body includes a first outer conductor and a first inner conductor; a first inner conductor is coaxially arranged inside the first outer conductor; the first outer conductor is electrically insulated from the first inner conductor;

the connector main body comprises an outer shell, a second outer conductor and a second inner conductor, wherein the second outer conductor is coaxially arranged inside the outer shell; a second inner conductor is coaxially arranged inside the second outer conductor, and the second outer conductor is electrically insulated from the second inner conductor;

the second inner conductor is in electrical contact with the first inner conductor, and the first outer conductor is in electrical contact with the second outer conductor;

the first outer conductor is provided with an outer thread groove, the inner wall of the second outer conductor is provided with an inner thread groove, and the outer thread groove is matched with the inner thread groove; an interference fit between the first outer conductor and the second outer conductor; the interference fit is used to improve joint strength and suppress third order intermodulation.

Further, the thread pitch of the external thread groove is P₁The pitch of the internal thread groove is P₂Said P is₁≠P₂。

The invention has the beneficial effects that:

by means of different thread pitches, interference connection between the first outer conductor and the second outer conductor can be achieved, so that the connection strength between the connector and the cable is effectively improved, and the outer conductor of the connector and the inner conductor of the cable are prevented from loosening and generating gaps; on the premise of ensuring the connection strength by the scheme, the signal difference between the conductors can be effectively reduced, and the purpose of effectively inhibiting third-order intermodulation is finally achieved.

Drawings

Fig. 1 shows a schematic view of a differential pitch coaxial cable termination structure according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The different pitch type coaxial cable termination structure comprises a cable main body 1 and a connector main body 2; the cable body 1 is assembled and connected with the connector body 2; the cable body 1 includes a first outer conductor 12 and a first inner conductor 13; a first inner conductor 13 is coaxially arranged inside the first outer conductor 12; the first outer conductor 12 is electrically insulated from the first inner conductor 13;

the connector body 2 comprises an outer shell 21, a second outer conductor 23 and a second inner conductor 24, wherein the second outer conductor 23 is coaxially arranged inside the outer shell 21; a second inner conductor 24 is coaxially arranged inside the second outer conductor 23, and the second outer conductor 23 is electrically insulated from the second inner conductor 24; the electric insulation is used for ensuring that the outer conductor can form a shielding structure;

the second inner conductor 24 is in electrical contact with the first inner conductor 13 and the first outer conductor 12 is in electrical contact with the second outer conductor 23; the coaxial connector can be connected by the electric contact of the inner conductor and the outer conductor;

the first outer conductor 12 is provided with an outer thread groove 121, the inner wall of the second outer conductor 23 is provided with an inner thread groove 231, and the outer thread groove 121 is matched with the inner thread groove 231; the male screw groove 121 and the female screw groove 231 are used to quickly assemble the cable body 1 with the connector body 2;

an interference fit between the first outer conductor 12 and the second outer conductor 23; the interference fit is used for improving the connection strength and inhibiting third-order intermodulation; the interference assembly can improve the connection strength, reduce the signal difference and further inhibit the three-order intermodulation.

As a modification of the above technical solution, the pitch of the male thread groove 121 is P₁The pitch of the female thread groove 231 is P₂Said P is₁≠P₂(ii) a The locking and fixing of the cable relative to the second outer conductor 24 is achieved by interference formed when the two are twisted at unequal pitches.

As shown in fig. 1, fig. 1 shows a schematic structural view of a differential pitch coaxial cable termination structure according to the present invention;

the connector body 2 includes an outer housing 21, a second outer conductor 23, a second inner conductor 24; a second outer conductor 23 is embedded in the outer end part of the outer shell 21, the second outer conductor 23 is spiral, an inner thread groove 231 is formed in the inner wall of the second outer conductor 23, and a second inner conductor 24 is arranged at the center line of the inner part of the outer shell 21;

the cable main body 1 comprises an outer sleeve 11, a first outer conductor 12 and a first inner conductor 13, wherein the outer sleeve 11, the first outer conductor 12 and the first inner conductor 13 are coaxially arranged from outside to inside in sequence, the first outer conductor 12 is in a threaded shape, and an outer threaded groove 121 is formed in the outer wall of the first outer conductor 12;

the first outer conductor 12 is screwed into the inside of the second outer conductor 23, and the internal thread groove 231 is engaged with the external thread groove 121; pitch P of the female thread groove 231₁Not equal to the pitch P of the external thread groove 121₂；

Example I, P₁＞P₂：

When the cable is screwed into the connector, the external thread groove 121 and the internal thread groove 231 interfere with each other, and the first outer conductor 12 is limited by the interference of the second outer conductor 23 in the screwing process; the internal thread groove 231 and the external thread groove 121 interfere with each other, after screwing is completed, the first inner conductor 13 is inserted into the second inner conductor 24, the end face of the outer sleeve 11 is attached to the end face of the connector body 2, and the first outer conductor 12 and the second outer conductor 23 are firmly connected together; the signal is transmitted to the second inner conductor 24 through the first inner conductor 13, the current of the first outer conductor 12 is transmitted to the second outer conductor 22 and then transmitted to the inner wall of the outer shell 21, and the outer shell 21 forms an electric shielding structure outside the second inner conductor 24.

Example two, P₁＜P₂：

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. Different pitch type coaxial cable termination structure which characterized in that: comprises a cable main body and a connector main body; the cable main body is assembled and connected with the connector main body; the cable body includes a first outer conductor and a first inner conductor; a first inner conductor is coaxially arranged inside the first outer conductor; the first outer conductor is electrically insulated from the first inner conductor;

2. The differential pitch coaxial cable termination of claim 1, wherein: the thread pitch of the external thread groove is P₁The pitch of the internal thread groove is P₂Said P is₁≠P₂。