High stability loudspeaker

• US 6,526,151 B1
• Filed: 06/29/2000
• Issued: 02/25/2003
• Est. Priority Date: 06/29/2000
• Status: Active Grant

• Current Assignee: Meiloon Industrial Company Limited
• Original Assignee: Meiloon Industrial Company Limited
• Inventors: Peng, Jack
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Ni, Suhan
• Application Number:
  US09/605,839
• Time in Patent Office: 971 Days
• Field of Search: 381/397, 381/398, 381/400, 381/407, 381/404, 381/412, 381/420, 381/FOR.154, 381/FOR.159, 381/403, 381/405, 181/171, 181/172, 181/199
• US Class Current: 381/403
• CPC Class Codes: H04R 9/043 Inner suspension or damper, e.g. spider outer suspension or surround H04R7/16
• CPC Class Codes: H04R 9/06 Loudspeakers

Abstract

A high stability loudspeaker has a yoke with a plurality of vents installed therein. The yoke is combined to a bottom of a frame of the loudspeaker. A magnet is placed in the yoke. A washer is arranged above the magnet. A periphery of the magnet is surrounded by a voice coil. A coil winding surrounds the voice coil. A combining portion is formed at a periphery of the yoke. The combining portion serves to be combined with a surround connected to a bottom of end of the voice coil. The voice coils is vertically installed in a gap between the portions of the yoke. The top of the voice coil is connected to another surround. Thereby, vibration of the voice coil is confined at the two ends. As a result, the gap between portions of the yoke structure into which the voice coil extends between portions of the yoke is reduced and therefore, the sensitivity of the loudspeaker is increased and the distortion is decreased.

Claims

1. A high stability loudspeaker having a yoke structure with a plurality of vents installed therein, the yoke structure being combined with a bottom of a frame of the loudspeaker;

a short post being installed in a center of the yoke structure;

a magnet being formed on the short post, wherein

a periphery of the magnet is surrounded by a voice coil having a first end and a second end, said voice coil extending into a gap between portions of said yoke structure;

a coil winding surrounds the voice coil;

the first end of the voice coil is connected to a diaphragm and to a first surround, said first surround being connected to said frame; and

the second end of the voice coil is connected to a second surround, said second surround being connected to a combining portion formed at a periphery of said yoke structure.

2. The high stability loudspeaker as claimed in claim 1, wherein the combining portion at the periphery of the yoke structure is a lip extending inwards by a predetermined distance.

3. The high stability loudspeaker as claimed in claim 1, wherein a lower edge of a lip of the combining portion in the yoke structure is installed with a stepped portion connected with the second surround.

4. A high stability loudspeaker having a yoke structure with a plurality of vents installed therein, the yoke structure being combined with a bottom of a frame of the loudspeaker;

a short post being installed in a center of the yoke structure;

a magnet being formed on the short post, wherein

a periphery of the magnet is surrounded by a voice coil having a first end and a second end, said voice coil extending into a gap between portions of said yoke structure;

a coil winding surrounds the voice coil;

the first end of the voice coil is connected to a diaphragm and said diaphragm is connected to a first surround, said first surround being connected to said frame; and

the second end of the voice coil is connected to a second surround, said second surround being connected to a combining portion formed at a periphery of said yoke structure.

5. The high stability loudspeaker as claimed in claim 4, wherein the combining portion at the periphery of the yoke structure is a lip extending inwards by a predetermined distance.

6. The high stability loudspeaker as claimed in claim 4, wherein a lower edge of a lip of the combining portion in the yoke structure is installed with a stepped portion connected with the second surround.