Anti-interference television system bidirectional user port capable of preventing creepage

A user port and TV system technology, applied in the field of TV signal connection devices, can solve problems such as user interference, endangering the lives of users and related staff, and degradation of the signal-to-noise ratio of TV images, and achieve anti-interference leakage and excellent viewing Excellent effect and personal safety

Active Publication Date: 2008-06-11
桂林市创琳电子科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Subscriber ports used in existing cable television reception systems, including digital television reception systems, whether unidirectional or bidirectional, regardless of the number of input ports and output ports, and whether standard F-type connectors or Other improved plug-in devices generally have the following common problems: 1. The input shielding wire of the coaxial cable is connected with the metal shielding shell of the user port. When the signal line or signal pole is passed in, the capacitor will not be able to isolate the electricity, so that the shell of the user port will be charged, and the electricity on the shell will be conducted to the TV or set-top box through the shielded wire of the output port of the user port to charge the TV or set-top box. At the same time, the electricity on the casing enters the entire network system through the shielded wire of the input port of the user port, so that all shielded wires, all user ports and all TV sets or set-top boxes of the same network system are charged, so that t...

Method used

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  • Anti-interference television system bidirectional user port capable of preventing creepage
  • Anti-interference television system bidirectional user port capable of preventing creepage
  • Anti-interference television system bidirectional user port capable of preventing creepage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: as figure 1 , there is an F-type output connector (4) on the aluminum alloy metal shell (1), a circuit board (2) inside, a capacitor (12) on the circuit board, and a protruding round platform on the outer part of the input port (3), The diameter of this circular platform is greater than the aperture of hole (9), and the shape of outer spacer (10) is as figure 2 , the protruding ring column is inserted into the hole (9) of the metal shell (1) from the outside to the inside. The input port (3) passes through the hole of the outer partition (10) from the outside to the inside, and the outer part and the inner part of the shell of the input port (3) have external threads, and the inner circle of the chip feedthrough capacitor (11) is a Screw the chip feedthrough capacitor (11) on the external thread of the inner part of the shield pole (7) that passes through the shell hole, and complete the connection between the shield pole (7) and the capacitor (11) , an...

Embodiment 2

[0025] Embodiment 2: The overall structure is the same as Embodiment 1, the only difference is that the outer part of the input port (3) and the output port (4) adopts image 3 The improved plug-in device shown. On this improved plug-in device, there are holes (13) on the outer metal shielding layer, holes (14) on the middle plastic layer, and screws are also arranged on the centermost metal reed for connecting the coaxial cable signal line. (15) matched screw holes, the cap of screw (15) has transverse groove. First loosen the screw (15), when the coaxial cable signal is inserted, then tighten the screw (15), the screw (15) will push the inserted signal line against the metal reed, and apply pressure to make the inserted signal line It is in firm contact with the metal reed to achieve a reliable connection that is not easy to loosen.

Embodiment 3

[0026] Embodiment 3: as Figure 4 As shown, the coaxial cable (16) passes through the hole (9) of the metal shielding case (1) as a whole, the signal line (18) is welded to the wire, and the other end of the wire is welded to one of the capacitors (12) in the circuit board (2). pole, the other pole of the capacitor (12) is connected with the signal pole (6) of the output port (4), and the shielding wire (19) is also welded with a section of wire, and the other end of this section of wire is welded in the capacitor (20 ), the other pole of the capacitor (20) is connected to the metal shielding shell (1) through a section of wire, and the coaxial cable (16) uses an insulating card (21 ) to be stuck, so as to achieve position fixation and insulation with the shielding case (1), so that the coaxial cable (16) cannot be pulled out or inserted from the hole (9), and the gap between the coaxial cable (16) and the hole (9) There is a non-conductive spacer (22) made of pressure-resist...

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PUM

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Abstract

The invention discloses an anti-interference and creepage protective television system two-way user port which comprises an integral metallic shield casing, a circuit board, an input port and an output port arranged in the casing, wherein signal poles for connection with a coaxial signal cable and shaded poles for connection with a coaxial shield cable are arranged on both the input port and the output port, and the shaded poles of the input port respectively enter the casing through holes in the casing without communication with the casing and are isolated from the signal poles in a non-capacitance mode. The invention which not only meets the requirements of a digital TV but also is compatible with an analog TV has reliable and definite anti-interference and creepage protective functions which exist even in case of TV and set-top box circuit abnormality. In whatever cable TV networks of a digital TV system or an analog TV system, the invention can overcome the defects of the prior art and ensure the personnel safety of the user and excellent visual effect.

Description

Technical field: [0001] The invention relates to a connection device for television signals, in particular to a bidirectional user port for digital television signals. Background technique: [0002] Subscriber ports used in existing cable television reception systems, including digital television reception systems, whether unidirectional or bidirectional, regardless of the number of input ports and output ports, and whether standard F-type connectors or Other improved plug-in devices generally have the following common problems: 1. The input shielding wire of the coaxial cable is connected with the metal shielding shell of the user port. When the signal line or signal pole is passed in, the capacitor will not be able to isolate the electricity, so that the shell of the user port will be charged, and the electricity on the shell will be conducted to the TV or set-top box through the shielded wire of the output port of the user port to charge the TV or set-top box. At the sam...

Claims

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Application Information

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IPC IPC(8): H04N7/10H04N5/00
Inventor 莫胜林
Owner 桂林市创琳电子科技发展有限公司
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