A flat speaker includes a diaphragm having a flat plate shape, a drive unit that is attached to a back surface of the diaphragm and vibrates the diaphragm, a fixing member that fixes an outer circumference of the diaphragm in a circumferential direction, a first support member that is disposed on an inner side in a radial direction of the fixing member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than a value of hardness of the fixing member and/or a value of internal loss larger than a value of internal loss of the fixing member, and a second support member that is disposed on an inner side in the radial direction of the first support member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than the value of hardness of the first support member and/or a value of internal loss larger than the value of internal loss of the first support member.

Various implementations include loudspeaker transducers. In some aspects, an electro-acoustic transducer includes: a diaphragm configured to move along an axis; a voice coil having a plurality of windings around the axis; a voice coil support configured to transfer forces from the voice coil to the diaphragm; a support structure that inhibits radial motion or tilting motion of the diaphragm and the voice coil support; and a magnetic core for driving the voice coil, the magnetic core including: two magnets having opposite polarity and approximately equal magnetic strength, where each of the magnets surrounds the voice coil, where a magnetic field from each magnet is approximately symmetric along the axis, and where the magnetic field from both magnets drives the voice coil.

The invention discloses a manufacturing method of a speaker vibrating diaphragm by controlling a ratio of fiber materials, the method comprising the steps of: (A) fabric provision: providing a fabric interwoven by a plurality of warps and a plurality of wefts; (B) impregnation: impregnating the fabric in a resin solution; (C) drying: drying the fabric impregnated with resin solution; (D) formation: pressing the dried resin-impregnating fabric to form a predetermined shape; and (E) cutting: cutting the formed speaker vibrating diaphragm from the fabric. Each of the plurality of warps and each of the plurality of wefts of the fabric has an individual yarn count and material composition. By controlling a combination of the yarn counts of the plurality of warps and the plurality of wefts, a total number of threads and a material composition ratio of the warps and wefts required for the vibrating diaphragm are achieved.

An electrodynamic transducer includes a rear frame defining an open frame interior, and a front frame enclosing the open frame interior and attached to the rear frame, the front frame including a center hub disposed about a central axis of the transducer. A movable diaphragm is positioned within the open frame interior and operably connected to the rear frame. A magnet assembly is disposed forward of the diaphragm and coupled to the center hub, the magnet assembly defining a magnetic air gap annularly disposed about the central axis. A voice coil is disposed in the magnetic air gap surrounding the magnet assembly and operably connected to the diaphragm. A first spider is coupled between the voice coil and the rear frame behind the diaphragm, and a second spider coupled between the diaphragm and the front frame and disposed forward of the diaphragm.

The invention discloses a manufacturing method of a speaker vibrating diaphragm by controlling a ratio of fiber materials, the method comprising the steps of: (A) fabric provision: providing a fabric interwoven by a plurality of warps and a plurality of wefts; (B) impregnation: impregnating the fabric in a resin solution; (C) drying: drying the fabric impregnated with resin solution; (D) formation: pressing the dried resin-impregnating fabric to form a predetermined shape; and (E) cutting: cutting the formed speaker vibrating diaphragm from the fabric. Each of the plurality of warps and each of the plurality of wefts of the fabric has an individual yarn count and material composition. By controlling a combination of the yarn counts of the plurality of warps and the plurality of wefts, a total number of threads and a material composition ratio of the warps and wefts required for the vibrating diaphragm are achieved.

The present disclosure discloses a diaphragm for radiating sound, including: a dome; a suspension surrounding the dome, including a first connecting portion adjacent to the dome and having a first surface and a second surface, a suspending portion extending from and surrounding the first connecting portion, and a second connecting portion extending from and surrounding the suspending portion. The suspending portion includes a concave part recessed along a direction from the first surface to the second surface, an inner edge connecting to the first connecting portion, and an outer edge connecting to the second connecting portion. The diaphragm further includes a stiffening layer located on the first surface of the first connecting portion, extending from the inner edge toward the dome. The present disclosure further includes a speaker incorporating the diaphragm.

An electro-acoustic transducer includes an accordion-type structure that functions as both an acoustic radiation element and an acoustic seal. In one example, the transducer includes parallel, accordion-type structures that attach to a flat, rectangular diaphragm. The diaphragm is connected to a voice coil. The voice coil and an associated frame are positioned between a magnet arrangement. The magnet arrangement includes stacked magnet pairs positioned between pole pieces to focus magnetic flux.

A speaker having a support structure having a bracket, and a vibration structure having a bend ring. The bend ring comprises an arc portion and an outer brim connected to the bracket. The outer brim of the bend ring extends downwardly to abut and connect to an outer brim of the top of the bracket, and the outer brim of the bend ring does not exceed the outermost end of the arc portion in the radial direction. The effective vibration area of a speaker is increased by using the above structure, so that the sensitivity of the speaker is improved.

A suspension element coupled to a diaphragm and to a frame of an acoustic device. The suspension element includes a first surround element and a second surround element that are located adjacent to each other. At least one of the surround elements includes at least one or more openings. The at least one or more openings have features of being located at an edge of the at least one of the surround elements adjacent to the other surround element, or being located in both of the surround elements.

A flat speaker includes a diaphragm having a flat plate shape, a drive unit that is attached to a back surface of the diaphragm and vibrates the diaphragm, a fixing member that fixes an outer circumference of the diaphragm in a circumferential direction, a first support member that is disposed on an inner side in a radial direction of the fixing member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than a value of hardness of the fixing member and/or a value of internal loss larger than a value of internal loss of the fixing member, and a second support member that is disposed on an inner side in the radial direction of the first support member, supports the back surface of the diaphragm in the circumferential direction, and has a value of hardness smaller than the value of hardness of the first support member and/or a value of internal loss larger than the value of internal loss of the first support member.