| 摘要 |
PURPOSE:To obtain a space with high magnetic flux density by opposing magnetic poles magnetized the same of a couple of cylindrical or columnar magnets and driving a diaphragm by a voice coil interlinked with the magnetic flux vertical to the axial direction of the magnets generating from the opposing part. CONSTITUTION:A couple of the cylindrical magnets 1, 2 are arranged so that the same magnetic poles (e.g., the N poles) are opposed via a disc spacer respectively. In this state, the magnets 1, 2 are fixed to a frame 5 by a fixing screw 4. Since the magnetic poles magnetized the same of the magnets 1, 2 respectively are opposed, the magnetic flux generated from the entire region of the N poles is diverged from the circumference of the spacer 3. Thus, a strong magnetic field is formed around the counter part of the magnets 1, 2. |
