US 12,302,077 B2
Loudspeaker spiders
Martial Rousseau, Worthing (GB)
Assigned to B&W GROUP LTD., Worthing (GB)
Appl. No. 17/774,560
Filed by B&W Group Ltd., Worthing (GB)
PCT Filed Nov. 2, 2020, PCT No. PCT/GB2020/052768
§ 371(c)(1), (2) Date May 5, 2022,
PCT Pub. No. WO2021/089990, PCT Pub. Date May 14, 2021.
Claims priority of application No. 1916280 (GB), filed on Nov. 8, 2019.
Prior Publication US 2022/0394391 A1, Dec. 8, 2022
Int. Cl. H04R 25/00 (2006.01); H04R 1/02 (2006.01); H04R 7/12 (2006.01); H04R 9/04 (2006.01); H04R 9/06 (2006.01); H04R 31/00 (2006.01); H04R 7/18 (2006.01); H04R 9/02 (2006.01)
CPC H04R 9/043 (2013.01) [H04R 1/025 (2013.01); H04R 7/12 (2013.01); H04R 9/06 (2013.01); H04R 31/006 (2013.01); H04R 7/18 (2013.01); H04R 9/025 (2013.01); H04R 2400/11 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A loudspeaker assembly comprising a diaphragm, a voice coil mounted on the diaphragm to move with the diaphragm, a chassis, and a spider, wherein
the spider extends across a gap between the chassis and the voice coil and comprises a plurality of legs, each leg extending radially across at least a portion of the gap;
the diaphragm is configured to move from a neutral position to an extended position and
wherein when the diaphragm is in the neutral position the cross-sectional shape of each leg follows a line which varies in height with respect to a reference plane, the reference plane being a plane perpendicular to the direction of movement of the voice coil, said line comprising first, second and third curves, the second curve being located in between the first and third curves and the amplitude of the first and third curves is greater than the amplitude of the second curve and wherein
either
the first and third curves are convex and the second curve is concave, or
the first and third curves are concave and the second curve is convex;
and
each concave curve extends from a local maximum to a local maximum via a local minimum and the amplitude of the curve is defined as the axial distance between said local minimum and the local maxima, and
each convex curve extends from a local minimum to a local minimum via a local maximum and the amplitude of the curve is defined as the axial distance between said local maximum and the local minima, and
in the case that the axial distance between the local maximum/minimum and each of the respective minima/maxima differs, the amplitude shall be taken as the larger of the two axial distances.