Abstract: The invention relates to a handle of assembly tool with an adjustable center of gravity. The handle comprises a tongue piece and a tube, wherein the tongue piece and the tube are connected to a functional part in the tool, and a through hole is formed in the tongue piece. A first plate and a second plate are arranged on both sides of the tongue piece. The first plate is provided with a first buckle, a first slot, a first fixing hole and a first groove; the second plate is provided with a second buckle, a second slot, a second fixing hole and a second groove; a fixing part is formed in the first slot and the second slot; a locking part is formed in the first groove and the second groove; the tube is connected with the first fixing plate and the second fixing plate, and a gasket is formed at the other end of the tube with a locking rod passed through; a weight unit is connected with the locking rod; the locking rod is inserted into the tube to connect with the locking part.

Abstract: A multispectral switch fiber optic lighting laryngoscope comprising: a laryngoscope handle configured with a connection part, and the connection part mechanically connects and fastens a laryngoscope blade. Configured in the laryngoscope handle is a LED light module that comprises a multispectral LED light which emits at least two different colors of light. Configured in the laryngoscope handle is a PCB module that comprises a control circuit and a switch button. The control circuit is electrically connected with the switch button and the multispectral LED light respectively, enabling a user to switch the color of emitted light and adjust radiation brightness from the multispectral LED light through pressing the switch button.

Abstract: A multispectral switch fiber optic lighting laryngoscope comprising: a laryngoscope handle configured with a connection part, and the connection part mechanically connects and fastens a laryngoscope blade. Configured in the laryngoscope handle is a LED light module that comprises a multispectral LED light which emits at least two different colors of light. Configured in the laryngoscope handle is a PCB module that comprises a control circuit and a switch button. The control circuit is electrically connected with the switch button and the multispectral LED light respectively, enabling a user to switch the color of emitted light and adjust radiation brightness from the multispectral LED light through pressing the switch button.