| 摘要 |
PURPOSE:To obtain an impact head easy to inject a heat conductive filler into the gap between an electromagnetic driving unit and a radiation member and not damaged by fire. CONSTITUTION:An injection hole 29 is provided to a radiation member 19 and a heat conductive filler 21 is injected into the gap between the radiation member 19 and an electromagnetic driving unit 5. Further, a filler 18 is thinly applied to the gap formed on the surface of the electromagnetic driving unit 5 and a heat conductive filler 20 is subsequently applied thereto to bond the unit 5 to the radiation member 19. Since the heat conductive filler 21 can be injected from the injection hole 29 after the radiation member 19 is attached, filling is easy. Since the whole of the side surface of the electromagnetic driving unit 5 can be bonded to the radiation member 19, radiation properties are good and no damage by firing. |
