207results about "Diaphragm extensions" patented technology

One embodiment of a low-profile transducer includes a at least one fin perpendicularly mounted on a planar diaphragm, with a voice coil mounted onto the fin. The voice coil may reside in a strong uniform magnetic field. The locations at which the diaphragm is connected to a frame may be coplanar with a center of mass of the diaphragm. The three-dimensional structure of diaphragm and fins may be formed using origami techniques.

The invention provides a speaker diaphragm. The speaker diaphragm comprises Kevlar fiber woven cloth and a PMI composite layer, wherein the PMI composite layer comprises more than one PMI layer of different densities. Base materials of the diaphragm comprise woven KEVLAR fiber and a PMI foaming material. The reason of using the two materials is that the two materials have very similar physical characteristics, like high rigidity, high modulus, low density, high temperature resistance (-190DEG C-200DEG C) and very low coefficient of thermal expansion, high corrosion resistance, and high fatigueresistance; further, the two materials have equal direction mechanical property, that is, isotropy. The internal damping can be adjusted, so that the internal damping of the overall diaphragm can beadjusted by changing the density of a rear damping material, then the resonance property of the composite diaphragm can be changed, the resonance frequency of the diaphragm is far from the working frequency range, therefore, in the effective working frequency range, segmentation vibration is reduced to the greatest extent, then distortion is lowered.

The invention provides a loudspeaker unit and a loudspeaker device. The main body of the loudspeaker unit is a rectangular basin structure, including a suspension system, a magnetic circuit system with an annular magnetic gap and a basin frame connecting the suspension system to the magnetic circuit system; the basin frame accommodates the suspension system and the magnetic circuit system, and themagnetic circuit system is fixed in the basin frame; the suspension system comprises a vibrating diaphragm and at least one voice coil connected to the bottom of the vibrating diaphragm; the magneticcircuit system comprises at least one magnetic circuit component matching the voice coil; one end of the voice coil is connected to the vibrating diaphragm through a voice coil framework, and the other end of the voice coil is placed in the annular magnetic gap formed by the magnetic circuit component; the voice coil can perform piston reciprocating vibration along the axial direction in the annular magnetic gap to push the vibrating diaphragm to vibrate to emit sound. The invention adopts a plurality of engines to drive the same vibrating diaphragm vibrate, and the vibration is more balancedand stable, which can reduce nonlinear vibration, and can control the size of the impedance RE; the invention has wide application range and beautiful structure, and can realize sufficient heat dissipation.

The invention relates to a dual-surround diaphragm, a loudspeaker and a mobile terminal. The dual-surround diaphragm comprises: an inner dome, an inner surround, an outer dome and an outer surround. The dual-surround diaphragm is used in the loudspeaker. By means of a multi-surround principle, a diaphragm is provided with the inner surround and the outer surround so that the area of the surround is increased. Thus, the proportion of low frequency is increased so as to obtain a good reductive effect and achieve pleasant sound. The loudspeaker is provided inner and outer voice coils and the inner and outer domes so as to increase the vibration amplitude of the inner dome. The vibration amplitude of the inner dome directly affects the volume of the loudspeaker, thereby improving the loudspeaker volume.

The invention discloses an MEMS microphone. The MEMS microphone comprises a substrate, and a vibrating diaphragm and a back pole located above the substrate, wherein a plurality of comb tooth parts are formed in edge positions of the vibrating diaphragm, and are distributed in the circumferential direction of the vibrating diaphragm at intervals; a part between every two adjacent comb tooth parts on the vibrating diaphragm is connected onto the substrate through an insulation layer; and the comb tooth parts on the vibrating diaphragm are at least partially superposed with the substrate, and a gap is formed between the comb tooth parts and the substrate and configured to be an air stream circulation channel for passage of air streams. The MEME microphone provided by the invention has the advantages that better anti-impact capability is achieved, and dust entry can be further avoided.