Long -range multimedia teaching auxiliary assembly

The utility model discloses a long -range multimedia teaching auxiliary assembly, including placing the board, place the board and pass through ball groove and ball ball joint, ball and first movablerod fixed connection, the inside through connection of first movable rod has locking device, it is ar...

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Bibliographische Detailangaben
1. Verfasser: XIE BIHUI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The utility model discloses a long -range multimedia teaching auxiliary assembly, including placing the board, place the board and pass through ball groove and ball ball joint, ball and first movablerod fixed connection, the inside through connection of first movable rod has locking device, it is articulated with the second movable rod that locking device passes through the hinge bar, the tip andthe slider fixed connection of hinge bar, slider and limiting plate sliding connection, locking device includes dop, connecting rod and baffle, dop and connecting rod fixed connection, the connectingrod runs through first movable rod and baffle fixed connection, be connected with the spring between dop and the first movable rod. The utility model discloses simple structure is through first movable rod and second movable rod articulated mode for the expansion bracket is wanted to reduce when perhaps rising, and is very easy, locking device utilizes the elasticity of spring for first fixed block and second fixed block j