| 摘要 |
PURPOSE: A speaker is provided to prevent damage of components due to heat. CONSTITUTION: A frame (10) is formed with case shape appearance approximately, and forms a penetrated hole (113) in one side center, and the other side of the frame is open. A magnetic circuit (120) generates magnetic force, and is combined to the lower side of the frame where the penetrated hole is formed. A sound generator (130) reproduces sound as being vibrated, and generates electricity in the frame. The magnetic circuit has a plate (121), a magnet (123) and a yoke (125). A pole (127) includes an external tube (127a), an internal tube (127b) and a sealing tube (127c). The external tube is extended from a supporting plate. The internal tube is formed in the inside of the external tube, and has gap from the external tube. The sealing tube is formed on the upper side of the external tube which is adjacent to a diaphragm (131) and on the upper side of the inner tube, and connects the external tube and the internal tube with each other, and seals the upper side of the external tube and the internal tube. |
