Abstract: A speaker device includes a static part, a driving part and a vibrating body. The vibrating body includes a plurality of diaphragms supported by the static part. A vibration direction converter part is provided between a first diaphragm and a second diaphragm facing each other in a plurality of the diaphragms, and connects the first diaphragm with the second diaphragm such that the first diaphragm and the second diaphragm synchronously move toward and away from each other. A part of the vibration direction converter part disposed in the proximity of the static part is supported by the static part, and a part of the vibration direction converter part disposed in the proximity of the driving part is supported by the driving part.

Abstract: The present invention is to provide a speaker having desirable sound characteristics with a smaller size, and a speaker unit having the speaker. The speaker unit has the speaker and an attachment unit. The speaker has a case, a magnetic circuit, a diaphragm, and a passage. A first chamber is disposed between an inner surface of an outer case of the case and an outer surface of the magnetic circuit. A second chamber is disposed between the diaphragm and the magnetic circuit. The passage communicates with the first and second chambers and has a groove disposed on a bottom wall of the case.

Abstract: It is an object of the present invention to use a simplified structure to improve a strength of a neck portion of a conical diaphragm in the vicinity of a voice coil fixing section, thereby inhibiting an undesired dividing vibration in a speaker device. The speaker device of the present invention comprises: a generally conical diaphragm having an opening formed in a generally central position thereof; a voice coil bobbin fixed in the inner circumferential portion of the foregoing opening of the diaphragm; and a diaphragm reinforcing annular member disposed near a fixing section fixing together the diaphragm and the voice coil bobbin.

Abstract: The speaker unit 1 includes a speaker 2 and a mounting bracket 3. The mounting bracket 3 includes an attachment 16, a connecting part 17, and an elastic part 18. The attachment 16 is attached to the speaker 2. The connecting part 17 is linked with the attachment 16. The elastic part 18 is linked with the connecting part 17. A biting projection 23 and the interfering projection 24 are formed on the elastic part 18. The biting projection 23 and the interfering projection 24 project from the elastic part 18. The biting projection 23 bites an inner surface of a hole of a dashboard. The interfering projection 24 interferes with a projection formed on the inner surface of the dashboard, and is disposed at a deeper side of the hole than the projection.

Abstract: A method for manufacturing an electroacoustic transducer diaphragm of a multilayered structure which includes a first diaphragm layer made from a synthetic resin material and molded into a predetermined shape through injection molding, and a second diaphragm layer laminated in close contact with the first diaphragm layer and made from a material differing from that of the first diaphragm layer, the method includes inserting the second diaphragm layer into a mold for injection molding, and forming the first diaphragm layer integrally with the second diaphragm layer by injection foam-molding within the injection mold.

Abstract: A cross-sectionally substantially-semicircular portion of an edge portion adapted to connect an outer periphery of a diaphragm to a speaker frame is configured to have an uneven-thickness structure in which the thickness of the portion gradually decreases toward a sticking portion of an outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm. Thus, the propagation characteristic of vibrations generated on the edge portion is improved. Disturbance is prevented from occurring in an mid-range frequency characteristic due to inverse resonance caused by the edge portion.

Abstract: A method for manufacturing a diaphragm for use in an electroacoustic transducer in a multi-layer structure which includes a first diaphragm layer of synthetic resin molded in a predetermined shape by injection molding and a second diaphragm layer layered in intimate contact on the first diaphragm layer and made of substance different from the first diaphragm layer, includes executing successively a pre-molding step and an injection-molding step, thereby providing the multi-layer structure. The pre-molding step includes attaching a non-molded sheet-like material which is a raw material of the second diaphragm layer to a mating surface of one of the die part of an injection molding die, and closing thereafter the injection molding die to give the sheet-like material a predetermined diaphragm shape. The injection molding step includes injecting synthetic resin material constituting the first diaphragm layer into the injection molding die thus closed thereby to form the first diaphragm layer.

Abstract: In a speaker device, a supporting member is arranged on a central axis, a diaphragm is provided on an outer circumference of the supporting member, and a damper is provided on the diaphragm. Preferably, the damper has a waterproof property. An inner peripheral edge portion of the damper is fixed to the supporting member on a sound output side with respect to the diaphragm, and an outer peripheral edge portion thereof is fixed to the diaphragm. The damper has a bent raised portion, on the outer peripheral side with respect to the fixing position to the diaphragm. By forming the bent portion on the outer peripheral end of the damper, it can be suppressed or prevented that the outer peripheral edge portion of the damper is deformed by a solvent of an adhesive agent at the time of attaching the outer peripheral edge portion of the damper and the diaphragm.

Abstract: The present invention is to provide a speaker having desirable sound characteristics with a smaller size, and a speaker unit having the speaker. The speaker unit has the speaker and an attachment unit. The speaker has a case, a magnetic circuit, a diaphragm, and a passage. A first chamber is disposed between an inner surface of an outer case of the case and an outer surface of the magnetic circuit. A second chamber is disposed between the diaphragm and the magnetic circuit. The passage communicates with the first and second chambers and has a groove disposed on a bottom wall of the case.

Abstract: A speaker bracket disposed between a front end circumferential wall of a speaker frame and a speaker mounting portion of a cabinet as an adjuster, the speaker bracket includes a body formed into an approximate ring shape. The body includes a first surface and a second surface. The first surface has a frame adjusting portion to be secured to the front end circumferential wall. The second surface has a cabinet adjusting portion fixed to the speaker mounting portion. The frame adjusting portion is attachable to the front end circumferential wall from both a front side and a rear side of the speaker frame.

Abstract: The speaker unit 1 includes a speaker 2 and a mounting bracket 3. The mounting bracket 3 includes an attachment 16, a connecting part 17, and an elastic part 18. The attachment 16 is attached to the speaker 2. The connecting part 17 is linked with the attachment 16. The elastic part 18 is linked with the connecting part 17. A biting projection 23 and the interfering projection 24 are formed on the elastic part 18. The biting projection 23 and the interfering projection 24 project from the elastic part 18. The biting projection 23 bites an inner surface of a hole of a dashboard. The interfering projection 24 interferes with a projection formed on the inner surface of the dashboard, and is disposed at a deeper side of the hole than the projection.

Abstract: It is an object of the present invention to use a simplified structure to improve a strength of a neck portion of a conical diaphragm in the vicinity of a voice coil fixing section, thereby inhibiting an undesired dividing vibration in a speaker device. The speaker device of the present invention comprises: a generally conical diaphragm having an opening formed in a generally central position thereof; a voice coil bobbin fixed in the inner circumferential portion of the foregoing opening of the diaphragm; and a diaphragm reinforcing annular member disposed near a fixing section fixing together the diaphragm and the voice coil bobbin.

Abstract: It is an object of the present invention to provide an improved speaker device equipped with a long plate, capable of realizing a high flux density within the magnetic gap without forming any un-useful space. The speaker device has a magnetic circuit including a yoke integrally formed with a center pole and a bottom yoke; an annular magnet; and an annular top plate. A voice coil wound around a voice coil bobbin fixed with a diaphragm is freely vibratably supported in the axial direction of the center pole within the magnetic gap g formed between the center pole and the yoke. Moreover, the speaker device has a first magnet having a first inner diameter and disposed on the bottom yoke, and a second magnet having a second inner diameter larger than the first inner diameter and disposed on the first magnet. The top plate has a radial direction rectangular section portion, and a cylindrical bent portion facing between the inner circumferential surface of the second magnet and the center pole.

Abstract: A speaker apparatus comprises an inner magnet type magnetic circuit for driving a voice coil connected to a vibrating plate. The magnetic circuit comprises; a yoke; a magnet at least partly mounted at an inside of the yoke; a pole piece being attached to the other magnetized face of the magnet at the inside of the yoke; a repulsive magnet both faces being magnetized to polarities reverse to a polarity of the magnet and attached on a surface thereof of a vibrating plate side of the pole piece; and a short-circuit ring mounted and fitted to an inner peripheral portion of a front end of the cylinder portion of the yoke.

Abstract: A speaker apparatus for vehicle in which a resin terminal plate is mounted on a speaker frame supporting a diaphragm of a speaker unit and at least one network element is mounted on the resin terminal plate. The network element on the resin terminal plate is covered with a resin hood, protecting the network element from water droplets due to dewing and preventing the network element from being contaminated.

Abstract: An outer circumferential portion of a speaker frame on which an edge overlap width portion of an edge portion around the outer circumference of a diaphragm has a taper portion overhanging obliquely forward from the speaker attaching opening diameter d1, an edge attachment portion extending from the outer circumference of the taper portion in a direction orthogonal to a central axis of the speaker, and a mounting plate contact portion extending from the outer circumference of the edge attachment portion to the speaker mounting plate, with a distal end contacting the speaker mounting plate. A resin packing carrying the edge overlap width portion with the edge attachment portion is provided.

Abstract: A cross-sectionally substantially-semicircular portion of an edge portion adapted to connect an outer periphery of a diaphragm to a speaker frame is configured to have an uneven-thickness structure in which the thickness of the portion gradually decreases toward a sticking portion of an outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm. Thus, the propagation characteristic of vibrations generated on the edge portion is improved. Disturbance is prevented from occurring in an mid-range frequency characteristic due to inverse resonance caused by the edge portion.

Abstract: A speaker device includes a magnetic circuit system having a resin frame and a plate. The frame holds the magnetic circuit system, and has a step portion, a hole portion, a recess portion and a slit. The step portion is formed on an inner surface of a peripheral edge portion of the frame, and the hole portion penetrates from a bottom surface of the step portion to the recess portion. The recess portion is formed on an outer surface of the frame. The slit is formed on the outer surface of the frame, and extends from the recess portion to the outer side. The step portion, the hole portion, the recess portion and the slit communicate with each other. Adhesive agent is applied to a gap between the outer peripheral edge portion of the plate and the inner peripheral wall of the frame.

Abstract: A speaker device includes speaker units for reproducing high- and low-frequency sound, a frame having a guide structure formed thereat, a relay wire drawn from a voice coil in the speaker unit for reproducing high-frequency sound, a relay wire for the speaker unit for reproducing low-frequency sound, and a terminal unit electrically connected to the side of an amplifier. Each of the relay wires is electrically connected to the terminal unit via the guide structure. An electric signal is input into the speaker units for reproducing high- and low-frequency sound from the side of the amplifier. The guide structure has a wall standing on a center axis side of the speaker device to restrict the movement of the relay wires, even if variations occur thereby preventing the relay wires from being loosened or expanded from the position of the wall toward the center axis side of the speaker device.

Abstract: A speaker device includes a resin frame and a resin grille mounted thereto. In the resin frame and the resin grille, engaging claws that engage with each other are formed, respectively. An inclined surface is formed on at least one of the engaging claws of the resin frame and the resin grille, and the other engaging claw engages with the one engaging claw on the inclined surface. When environmental temperature falls, the resin frame and the resin grille contract in the vertical and horizontal directions, and, when the temperature rises, the resin frame and the resin grille expand in the vertical and horizontal directions. However, even when such temperature changes occur, the engaging claw of the resin frame constantly engages with the inclined surface of the resin grille. Therefore, no backlash occurs between the engaging claw of the resin frame and the engaging claw of the resin grille.