Switched-mode light-emitting diode (LED) display unit satisfying fire-fighting smoke exhaust ventilation requirements

A switched-mode light-emitting diode (LED) display unit satisfying fire-fighting smoke exhaust and ventilation requirements, comprising an LED display unit, a mounting member, an opening-closing actuator and a pressing member, wherein the LED display unit is mounted on the mounting member;

• and
• the mounting member is mounted on a display panel by the opening-closing actuator and the mounting member is pressed against the display panel by the pressing member,
• wherein the opening-closing actuator is a spring hinge assembly, and the spring hinge assembly is mounted in a middle of the mounting member;
• the spring hinge assembly comprises a spring hinge, a connecting shaft, and at least two connecting pieces;
• the at least two connecting pieces are mounted on the connecting shaft;
• the at least two connecting pieces are mounted on the mounting member;
• and the spring hinge is mounted at two ends of the connecting shaft and the spring hinge is connected to and fixed to an adjacent fixing unit by a spacer.

A switched-mode light-emitting diode (LED) display unit satisfying fire-fighting smoke exhaust and ventilation requirements, comprising an LED display unit, a mounting member, an opening-closing actuator and a pressing member, wherein the LED display unit is mounted on the mounting member;

• and
• the mounting member is mounted on a display panel by the opening-closing actuator and the mounting member is pressed against the display panel by the pressing member,
• wherein the opening-closing actuator comprises one of:
• a motor assembly, wherein the motor assembly comprises a first steering engine, a connecting shaft, at least two connecting pieces, and a bearing;
• the at least two connecting pieces are mounted on the connecting shaft;
• the at least two connecting pieces are mounted on the mounting member;
• the first steering engine is connected to and fixed to an adjacent fixing unit by a first steering engine support;
• the connecting shaft has a first end connected to the first steering engine by a shaft sleeve and a second end inserted into the bearing;
• and the bearing is fixed to the adjacent fixing unit;
• or
• a pneumatic/hydraulic rod, wherein the pneumatic/hydraulic rod has a first end fixed to an adjacent fixing unit by a mounting seat and a second end connected to the mounting member;
• and one end of the mounting member is hinged to the display panel.