Abstract: An improved structure of a safety plug for coaxial cable comprising a main body and a hand tool, said main body is a hollow circular tube having an internal flange at its rearward wall, in an appropriate location at the forward end of the circular tube is an annular groove and an annular sloping portion in between the annular groove and the sloping portion, which are both inside the circular tube, are spring washer, a coaxial cable and a clamping element. When the main body of the safety plug is rotated, the cable will not be able to rotate with the main body, a special hand tool has to be used to drive the safety plug with the coaxial cable into and out of the input jack.

Abstract: A coaxial cable connector including a main body containing a contact member and two insulating members fitted with the contact member, with each insulating member composed of an insulating sleeve, a resilient member and an insulating cap. The stretching ability of a cable conductor inserted into the contact portion of the contact member is limited by the resilient member and an extra resilient compressing force is exerted on the contact surface to provide improved contacting effect with coaxial cables having conductors of different diameters.

Abstract: A coaxial cable output terminal safety plug device, which comprises a driving tool to drive a plug to fastened in a coaxial cable output terminal which is not 5 in use. The plug comprises a round tube having received therein a threaded tube which has a resistor driven to insert in the signal output hole of a coaxial cable output terminal to match the impedance.