Surround with grooves, loudspeaker transducer and enclosure comprising the surround

The ribbed suspension design addresses non-linear behavior in loudspeakers by optimizing weight and stiffness, reducing noise and enhancing excursion and positioning flexibility.

EP4356625B1Active Publication Date: 2026-07-01C TECHNOLOGIES
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
C TECHNOLOGIES
Filing Date
2022-07-21
Publication Date
2026-07-01

AI Technical Summary

Technical Problem

Existing loudspeaker suspensions in small volume enclosures experience non-linear behavior due to pressure changes, leading to unwanted noise and inefficiencies, and current solutions either increase mass or stiffness, affecting performance and positioning flexibility.

Method used

A ribbed suspension design with specific geometric features, including a curved edge and angled flanks, enhances stiffness and reduces mass, minimizing unwanted noise and improving excursion capability.

Benefits of technology

The ribbed suspension optimizes weight and stiffness, allowing large excursions without noise, and enables flexible positioning and orientation of loudspeakers.

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Abstract

The loudspeaker suspension has, in an overall surface (45) exhibiting symmetry of rotation about an axis, the cross section of this overall surface in a plane passing through this axis having, successively from furthest away from to closest to the axis, and connected together by angles: - a line segment (21) referred to as a "bonding" line segment corresponding to a bonding zone, - a straight line segment (22), referred to as an "external flank" straight line segment corresponding to an external flank of the suspension, and - at least one circular arc (23, 24) corresponding to the front face of the suspension; at least one rib, recessed into this surface, having: - a ridge (27) at a distance from the overall surface of the suspension, this ridge having a circular part (31), and - flanks connecting this ridge to this surface. The ridge (27) leads onto the external flank straight line segment (22), in the central third of this segment.
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