Coaxial cable copper pipe connecting device

Abstract

A coaxial cable copper pipe connecting device is formed through blanking and punching of an entire beryllium bronze band. Through punching, an installation fixing hole is formed in the bottom surface and a plurality of spring sheets are formed on the bottom surface. A ball surface is arranged on the top end of each spring sheet. The maximum distance between the ball surface and the top end of each spring sheet is less than 0.5 mm. The bottom surface of the installation fixing hole and each spring sheet form a certain angle. The connecting device is then subjected to heat treatment of a vacuum furnace, the temperature of the inside of which is between 305 and 310 DEG C, kept for 2 h, and subjected to vacuum-cooling until the temperature of the device is below 40 DEG C, so that it is ensured that the ratio of the outer diameter of each spring sheet before contraction to that after contraction is 2:1, and the spring sheet can rebound without breaking. The connecting device has an excellent contraction ratio, and can be adapted to coaxial cable copper pipes with different inner diameters. The ball surfaces on the top ends of the spring sheets increase the effective contact area of the device and a coaxial cable copper pipe, reduces the contact resistance and the friction resistance at the same time, and prevents the spring sheet from fracturing.

Description

technical field [0001] The invention relates to a reliable connection method between a radio frequency coaxial connector and a coaxial cable in a mobile communication base station system, in particular to a coaxial cable copper pipe connection device. Background technique [0002] The main feeder cables of mobile communication base stations mainly use 7 / 8~5 / 4 corrugated copper tube RF coaxial cables at present, and the main feeder cables and jumper antennas are connected by radio frequency coaxial connectors. The connection methods of copper pipes are plug-in type, that is, the conductor in the connector is inserted into the copper pipe of the cable. Since the national standard or industry standard has standard regulations on the outer diameter of the inner conductor of the cable, the inner diameter has no detailed requirements, and the inner diameter of the cable copper tube of each manufacturer is different from each other, and the tolerance is relatively large. Taking th...

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Problems solved by technology

Taking the 7 / 8 cable as an example, the inner diameter of the copper pipe is from φ7.9mm to φ8.5mm. The various cables cannot be unified during on-site installation, which will lead to continuous changes in the outer diameter of the inner conductor of the connector; secondly, the inner conductor of the connector contacts The unreasonable design of the parts makes the contact parts easy to break during on-site installation. The above problems directly affect the electrical performance of the mobile base station. If it is light, it will increase the voltage standing wave ratio and affect the coverage radius of the base station; if it is serious, the contact will be bad and the signal will be interrupted. , causing losses to the operator

[0003] ZL200920048277.6 discloses an elastic contact RF coaxial connector. One end of the inner conductor is provided with an elastic contact piece. The elastic contact piece is composed of 8 identical petals. The 4 petals are molded and bent at a distance of 3mm from the top. 150°, which can ensure a good contact surface with the inner wall of the inner conductor of the cable; under the support of the inner conductor, the outer diameter of the elastic contact piece gradually increases, which meets the requirements of different inner diameters of the inner conductor of the cable to a certain extent. The newly added inner conductor increases the difficulty of assembly, the manufacturing cost is high, and the contact performance is prone to failure

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