Highly directional tunnel broadcast for expressway tunnel

The utility model discloses a highly directional tunnel broadcast for an expressway tunnel, and relates to the technical field of broadcast devices. The device comprises a bottom plate and a fixing plate, the fixing plate is fixedly connected to the front side face of the bottom plate, a fixing devi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YANG XINYU, ZHANG JIANHUI, ZHANG WEIMIN, KO JANG-HO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ADVERTISING BLASTING CLEANING CLEANING IN GENERAL CRYPTOGRAPHY DISPLAY DISPLAYING EDUCATION ENGINEERING ELEMENTS AND UNITS FRAMES, CASINGS, OR BEDS OF ENGINES OR OTHER MACHINES ORAPPARATUS NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUSPROVIDED FOR ELSEWHERE GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LABELS OR NAME-PLATES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS PREVENTION OF FOULING IN GENERAL SEALS SIGNS STANDS OR SUPPORTS THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The utility model discloses a highly directional tunnel broadcast for an expressway tunnel, and relates to the technical field of broadcast devices. The device comprises a bottom plate and a fixing plate, the fixing plate is fixedly connected to the front side face of the bottom plate, a fixing device is arranged on the front side face of the fixing plate and comprises a sliding groove, the sliding groove is formed in the front side face of the fixing plate, a sliding block is slidably connected to the inner wall of the sliding groove, and a lower pressing plate is fixedly connected to the front side face of the sliding block. Through the driving force of the electric telescopic rod, the sliding groove, the sliding block, the lower pressing plate, the supporting plate and other assemblies are driven to be matched with one another, the lower pressing plate at the end, away from the supporting plate, of the electric telescopic rod is driven to slide on the circumferential face of the sliding rod, and therefore