Transducer diaphragm
View Patent ↗A diaphragm for a loudspeaker may include a continuous primary diaphragm having an upper surface and a lower surface, where the primary diaphragm comprises a ring-shaped, flat region having an inner diameter and an outer diameter. The diaphragm may also include a reinforcing ring attached to the upper surface of the primary diaphragm, where the reinforcing ring has an inside diameter and an outside diameter, and where the reinforcing ring is attached to the upper surface of the primary diaphragm such that the inside diameter of the reinforcing ring coincides with the inner diameter of the flat region.
1. A diaphragm for a loudspeaker, the diaphragm comprising:
a primary diaphragm having an upper surface and a lower surface, wherein the primary diaphragm comprises a ring-shaped, flat region having an inner diameter and an outer diameter, and wherein the primary diaphragm comprises a groove adjacent to the inner diameter of the flat region; and
a reinforcing ring attached to the lower surface of the primary diaphragm, wherein the reinforcing ring has an inside diameter and an outside diameter, and wherein the reinforcing ring is attached to the lower surface of the primary diaphragm such that the inside diameter of the reinforcing ring coincides with the inner diameter of the flat region.
2. The diaphragm of claim 1 , wherein the primary diaphragm has a uniform thickness.
3. The diaphragm of claim 1 , wherein the reinforcing ring comprises a variable thickness that decreases from the inside diameter to the outside diameter of the reinforcing ring.
4. The diaphragm of claim 1 , wherein the outside diameter of the reinforcing ring coincides with the outer diameter of the flat region.
5. The diaphragm of claim 1 , wherein the groove comprises an indentation on the upper surface of the primary diaphragm and a corresponding protrusion on the lower surface of the primary diaphragm.
6. The diaphragm of claim 1 , wherein the groove of the primary diaphragm surrounds a flat, continuous area.
7. The diaphragm of claim 1 , wherein the diaphragm further comprises a bead of adhesive joining the inside diameter of the reinforcing ring with the groove.
8. A loudspeaker comprising:
a frame;
a voice coil suspended at least partially within a gap of a magnetic structure, wherein the magnetic structure is attached to the frame;
a diaphragm comprising:
a primary diaphragm having an upper surface and a lower surface, wherein the primary diaphragm comprises a ring-shaped, flat region having an inner diameter and an outer diameter, and wherein the primary diaphragm comprises a groove adjacent to the inner diameter of the flat region; and
a reinforcing ring attached to the lower surface of the primary diaphragm, wherein the reinforcing ring has an inside diameter and an outside diameter, and wherein the reinforcing ring is attached to the lower surface of the primary diaphragm such that the inside diameter of the reinforcing ring coincides with the inner diameter of the flat region;
a first suspension element attached circumferentially to an outer edge of the primary diaphragm, wherein the first suspension element is further attached to the frame; and
a second suspension element attached circumferentially to the lower surface of the primary diaphragm, wherein the second suspension element is further attached to the frame.
9. The loudspeaker of claim 8 , wherein the voice coil is attached to the reinforcing ring.
10. The loudspeaker of claim 8 , wherein the reinforcing ring comprises a variable thickness that decreases from the inside diameter to the outside diameter of the reinforcing ring.
11. The loudspeaker of claim 8 , wherein the outside diameter of the reinforcing ring coincides with the outer diameter of the flat region.
12. The loudspeaker of claim 8 , wherein the groove comprises an indentation on the upper surface of the primary diaphragm and a corresponding protrusion on the lower surface of the primary diaphragm.
13. The loudspeaker of claim 8 , wherein the groove of the primary diaphragm surrounds a flat, continuous area.
14. The loudspeaker of claim 8 , wherein the diaphragm further comprises a bead of adhesive joining the inside diameter of the reinforcing ring with the groove.
15. A method of assembling a diaphragm for a loudspeaker comprising:
forming, from a first material having a uniform thickness, a primary diaphragm having an upper surface and a lower surface, wherein forming the primary diaphragm comprises forming a flat region having an inner diameter and an outer diameter and forming a groove adjacent to the inner diameter of the flat region;
forming, from a second material, a reinforcing ring having an inside diameter and an outside diameter; and
attaching the reinforcing ring to the lower surface of the primary diaphragm such that the inside diameter of the reinforcing ring coincides with the inner diameter of the flat region.
16. The method of claim 15 , further comprising:
applying a bead of adhesive to the diaphragm such that the bead of adhesive joins the inside diameter of the reinforcing ring with the groove.
17. The method of claim 15 , further comprising:
attaching a voice coil to the reinforcing ring.
18. The diaphragm of claim 1 , wherein the groove of the primary diaphragm surrounds a concentric aperture in the primary diaphragm.
19. The loudspeaker of claim 8 , wherein the groove of the primary diaphragm surrounds a concentric aperture in the primary diaphragm.
20. The method of claim 15 , wherein forming the primary diaphragm comprises forming a concentric aperture in the primary diaphragm, wherein the groove surrounds the concentric aperture.