| 摘要 |
PURPOSE:To obtain a ribbon-type speaker which is capable of the effective use of the magnetic circuit by forming a number of magnetic gaps between a pair of magnets. CONSTITUTION:The magnetic gaps are formed between projections 30a, 30c and poles 25a and 25b each by stacking, as shown in the diagram, a pair of magnets 21 snd 22, yoke 23 possessing poles 25a and 25b, 1st and 2nd plates possessing projections 30a and 30b plus 3rd plate 29 possessing projection 30c each. Plate 29 also contains sound discharge slit 31 and projection 30c orthogonal to slit 31. And driving conductor patterns 36 printed on vibrator substance 32 are distributed within the gaps mentioned above. More number of poles 25a and 25b can be provided preferably, and accordingly the number of projections 30a-30c are increased. |
