Loudspeaker diaphragm and loudspeaker including the loudspeaker diaphragm

• US 8,755,557 B2
• Filed: 06/23/2011
• Issued: 06/17/2014
• Est. Priority Date: 06/25/2010
• Status: Expired due to Fees

• Current Assignee: ONKYO Corporation (Onkyo Home Entertainment Corp.)
• Original Assignee: ONKYO Corporation (Onkyo Home Entertainment Corp.)
• Inventors: Fujitani, Takeshi, Ono, Yushi, Takahashi, Ryoichi, Sano, Ryosuke
• Primary Examiner(s): Goins, Davetta W
• Assistant Examiner(s): DABNEY, PHYLESHA LARVINIA
• Application Number:
  US13/167,215
• Publication Number:
  US 20110317869A1
• Time in Patent Office: 1,090 Days
• Field of Search: 181/167, 181/169, 181/171, 381/398, 381/396, 381/423
• US Class Current: 381/398
• CPC Class Codes: H04R 2307/025 Diaphragms comprising polymeric materials
• CPC Class Codes: H04R 2307/204 Material aspects of the outer suspension of loudspeaker diaphragms
• CPC Class Codes: H04R 31/003 for diaphragms or their outer suspension
• CPC Class Codes: H04R 7/12 Non-planar diaphragms or cones
• CPC Class Codes: H04R 7/18 at the periphery
• CPC Class Codes: H04R 9/06 Loudspeakers

Abstract

A loudspeaker diaphragm according to an embodiment of the present invention includes: a diaphragm portion; and an edge portion, which is molded integrally with the diaphragm portion and made of a material different from a material for the diaphragm portion, wherein: the diaphragm portion includes, at an outer peripheral end thereof, an outer wall portion provided upright in a direction substantially parallel to a vibrating direction of the diaphragm portion; an inner peripheral surface of the edge portion is bonded onto an outer peripheral surface of the outer wall portion; and the outer wall portion has a height larger than a thickness of the diaphragm portion.

Claims

1. A loudspeaker diaphragm, comprising:

a diaphragm portion; and

an edge portion, which is molded integrally with the diaphragm portion and made of a material different from a material for the diaphragm portion, wherein;

the diaphragm portion comprises, at an outer peripheral end thereof, an outer wall portion provided upright in a direction substantially parallel to a vibrating direction of the diaphragm portion;

an inner peripheral surface of the edge portion is bonded onto an outer peripheral surface of the outer wall portion; and

the outer wall portion has a height larger than a thickness of the diaphragm portion, wherein;

the outer wall portion comprises a protruding portion protruding in a radial direction; and

the protruding portion comprises a plurality of protruding portions provided at substantially equal intervals in a circumferential direction of the outer wall portion.

2. A loudspeaker diaphragm according to claim 1, wherein the diaphragm portion comprises a voice coil guide portion extending below the outer wall portion.

3. A loudspeaker, comprising:

the loudspeaker diaphragm according to claim 2; and

a voice coil fitted to the voice coil guide portion.

4. A loudspeaker diaphragm according to claim 1, wherein the diaphragm portion comprises a polyolefin-based thermoplastic resin and one of an inorganic filler and grain.

5. A loudspeaker diaphragm according to claim 1, wherein the edge portion has a JIS-A hardness of 0°

to 70°

.

6. A loudspeaker diaphragm according to claim 1, further comprising a gasket portion which is made of the same material as the material for the diaphragm portion and molded integrally with and bonded to an outer peripheral portion of the edge portion.

7. A loudspeaker diaphragm according to claim 1, wherein the diaphragm portion and the edge portion are obtained by being molded integrally with each other by double molding.