Patent ID: 6285773
Filing Date: 2001-09-04
Classification: H04R

Abstract:
Loudspeaker of elongate overall shape, termed a linear loudspeaker, comprising a parallelepipedal hollow body (1) of elongate shape, a longitudinal face of which consists at least partially of a plane diaphragm (7) of elongate rectangular shape, suspended by its edges (10) from the adjacent lateral faces (2) of the said body (1) or under the base (3) of the said body (1), and integral with an elongate internal rigid wing (11) which runs in the longitudinal direction of the said body (1), substantially in the midplane (P) of the latter, and which bears a moving electromagnetic coil (13) of elongate profile, located between two fixed elongate magnets (5), associated with fixed pole parts, characterized in that the moving electromagnetic coil (13) is parallel to the diaphragm (7), and arranged between two fixed elongate magnets (5) located respectively along two longitudinal lateral faces (2) of the said body (1), these lateral faces (2) and the base (3) of the body (1) forming fixed pole parts, which also comprise a central fixed pole part (4), situated in the longitudinal midplane (P) of the body (1) and received in a longitudinal recess (12) of the internal rigid wing (11) of the diaphragm (7), the said diaphragm (7) thus being stretched in such a way as to allow its symmetric deformation on either side of its position of rest, in the course of the vibrational motion of this diaphragm (7) when the loudspeaker is excited.