TV signal cutter
The utility model relates to a TV signal cutter, a switching device which is arranged on a TV signal wire [3] and conducts controlling by use of a pyroelectric infrared ray probe [1]. The switching device is a relay [4], the signal output end of the pyroelectric infrared ray probe [1] is connected w...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The utility model relates to a TV signal cutter, a switching device which is arranged on a TV signal wire [3] and conducts controlling by use of a pyroelectric infrared ray probe [1]. The switching device is a relay [4], the signal output end of the pyroelectric infrared ray probe [1] is connected with the relay [4] and the two normally-closed contacts of the relay [4] are connected with the TV signal wire [3] respectively. The utility model has a simple structure, has low cost and convenient installation, which can avoid asthenopia and eyesight barrier due to close distant watching and plays a role in protecting the eyes and preventing the short sight of the children and youngsters. |
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