Ultra-long magnetic field moving-coil speaker

Abstract

The invention discloses an ultra-long magnetic field moving-coil speaker comprising a frame, a magnetic circuit system and a vibrating system. The magnetic circuit system comprises an upper clamp plate, a lower clamp plate, a core and a magnet; a magnetic gap forms between the inside of a center hole of the upper clamp plate and the outside of the upper end of the core; the vibrating system comprises a voice coil, a damper and a paper cone; the lower end of the voice coil is inserted into the magnetic gap; the voice coil is 1-32ohm in impedance; the diameter of the frame is defined as R, and the thickness of the upper clamp plate is defined as H; the diameter R of the frame and the thickness H of the upper clamp plate meet the specific conditions. The ultra-long magnetic field moving-coil speaker has the advantages that the greater length of the magnetic cap ensures that the diameter of the voice coil needs to be increased on the premise of ensuring impedance uniformity, the length of a conductor of the voice coil in the magnetic field is increased as the diameter of the voice coil is increased, the longer a coil winding in the magnetic field, the higher the kinetic energy produced by the injected audio current of the magnetic circuit system, cutting magnetic lines of force, and the higher the efficiency; the length of the magnetic cap is increased, relative displacement ratio of the voice coil in the magnetic field is decreased, and distortion can be effectively decreased.

Description

technical field [0001] The invention relates to a moving-coil loudspeaker, in particular to an ultra-long magnetic field moving-coil loudspeaker. Background technique [0002] The moving coil speaker is composed of a magnetic circuit system, a vibration system and an auxiliary system. The basic magnetic circuit system of a dynamic speaker (a dynamic speaker with an external magnetic structure as an example, the same below) is mainly composed of an upper splint, a lower splint, an iron core and a magnet. The middle of the annular lower splint is seamlessly connected with the cylindrical iron core to form a T-iron assembly; the upper end of the T-iron assembly is respectively glued with an annular magnet and an annular upper splint to form the most basic structure of the magnetic circuit system of the external magnetic moving coil speaker. In the magnetic circuit system, the annular gap (abbreviated as the magnetic gap) corresponding to the inner side of the middle hole of th...

AI Technical Summary

Problems solved by technology

No kinetic energy is generated outside the available magnetic field, and eddy currents are generated as the current increases, which will cause the voice coil to heat up, and in severe cases, it will cause the voice coil to be burned; and the greater the proportion of the voice coil jumping out of the effective magnetic field, the greater the distortion

Images