Abstract: A speaker driver has a detachable motor and basket to allow attachment or separation of the motor assembly from the basket assembly. Two embodiments are disclosed, a thread-on detachable motor and a bolt-on detachable motor.

Abstract: An acoustical transducer such as an audio loudspeaker or a microphone, having a suspension component whose outermost edge extends axially rather than radially and couples with an axial mounting surface in the transducer's frame rather than with a radial flat surface of the frame. The suspension component may be a surround or a spider. Eliminating the radial portions of the suspension component and the frame enables the use of a larger diaphragm within a transducer of unchanged outer dimensions, increasing the amount of air moved by or moving the diaphragm. It also enables closer on-center packing of multiple transducers onto the same baffle such as the front baffle of a speaker enclosure, or, put another way, it enables a higher percentage of the mounting baffle's front surface area to be covered with moving diaphragm area. Radial mounting flanges and their mounting holes are limited to portions of the frame which will not increase the gap space between adjacent transducers or other boundaries.

Abstract: A speaker in which the basket holding the voice coil, cone and damper has a ribbed top flange and a ribbed bottom flange, a gasket is capped on the suspension of the cone at the ribbed top flange and fastened thereto with screws without the use of glue, and a holder frame is pressed on the periphery of the damper at the ribbed bottom flange and fastened thereto with screws.

Abstract: A piezoelectric electroacoustic transducer includes a substantially rectangular piezoelectric diaphragm having electrodes and flexurally vibrating in response to application of an alternating signal between the electrodes, a resin case having a supporting member disposed inside sidewalls of the case for supporting the diaphragm, terminals insert-molded in the case so as to have internal connections exposed in the supporting member and external connections exposed on the external surface of the case, a conductive adhesive for electrically connecting the electrodes of the diaphragm to the internal connections of the terminals, an elastic sealant for sealing a gap between the external periphery of the diaphragm and the internal periphery of the case, and a lid plate for closing an opening of the case.

Abstract: A panel-form loudspeaker includes a radiating panel, a frame, a suspension unit, a transducer and a linkage unit. The frame is used for supporting and positioning the radiating panel. The suspension unit is disposed between the frame and the bottom periphery of the radiating panel, and is made of a soft material. The transducer includes a voice coil unit and a magnet unit. The voice coil unit is coupled to the radiating panel at a specific location under the radiating panel. The linkage unit includes a first linking portion coupled to the frame, a second linking portion coupled to the voice coil unit via a resilience support, and a third linking portion coupled to the magnet unit.

Abstract: A speaker and its production method in which productivity can be enhanced and characteristics can be easily improved. A frame 14 of a speaker 10 is divided into a first frame body 15 and a second frame body 44 and the first and second frame bodies 15, 44 can be put together by engaging. A voice coil 35, a magnetic circuit 16 and a damper 17 are attached to the first frame body 15 constituting a first assembly 11. A cone paper 45 is attached to the second frame body 44 constituting a second assembly 12. Claw-shaped hooks formed on the second frame body 44 are to catch an engaging part 21 formed at the first frame body 15 in order to connect the first assembly 11 and the second assembly 12 to construct the speaker 10. The two assemblies 11, 12 can be produced in parallel. This leads to an improvement in the production efficiency.

Abstract: An electro-dynamic loudspeaker includes a chassis (2), a three-dimensional diaphragm (8) and an electromagnetic actuator (6). The diaphragm is connected to the chassis by a first flexible connection (18) provided near a front part (8a) of the diaphragm and by a second flexible connection (20) provided near a back part (8b) of the diaphragm. The actuator includes a stationary actuator element (6a) fixed to the chassis and a translatable actuator element (6b) fixed to the diaphragm. When energized, both actuator elements magnetically co-operate with one another over an air gap (16). In order to realize a flat but powerful speaker, the device as such and the air gap are outside the area (26) enclosed by the diaphragm but within the space (24) between the first and second flexible connections.

Abstract: A damper-mounting wall portion 40 which is provided on a small-diameter end of a trumpet-shape part of a frame 1 so as to extend in a diametrically inward direction is formed with an outside diameter which is larger than a diameter of a damper 8 which is adhered thereto. On a peripheral edge portion of the damper-mounting wall portion 40, there is integrally formed an annular eave-shaped barrier wall portion 41 which extends in an axial direction toward the front side of the frame 1 so as to enclose the circumference of the damper 8 at a position away from the periphery of the damper 8.

Abstract: A case for containing an electrical instrument, comprises a frame having a peripheral wall portion, a cover member having a peripheral wall portion fitted on the peripheral wall portion of said frame and configured to form a space for containing the electrical instrument between the frame and the cover member, at least one hole provided in one of the peripheral wall portions of the frame and the cover member to fix the frame and the cover member, and a protrusion provided on the other of the peripheral wall portions of the frame and the cover member for being inserted in said hole.

Abstract: A loudspeaker consisting of a diaphragm, a voice coil carrier secured to the diaphragm in a central area, a voice coil wound around said voice coil carrier, a magnetic system inserted into the voice coil carrier and voice coil in a partial or complete manner, a basket supporting the magnet system and enclosing the diaphragm on one face thereof, an elastic bead fastened to the basket and an edge area of the diaphragm, and a centering device attached to the basket and fastened to the diaphragm in a central area, said centering device being provided with an elastic bead that is directly or indirectly fastened to the basket and the diaphragm.

Abstract: An elliptical speaker system is provided for in-wall/in-ceiling mounting. The speaker system comprises an elliptical speaker frame or bracket defining a speaker front plane having a generally arcuate inner surface. First and second speaker components are mounted within the speaker frame, on opposing sides of the speaker inner surface. At least one of the speaker components may be translatable within the speaker frame.

Abstract: A knockdown speaker. The speaker includes a magnetic circuit base, a casing, and a vibration unit. The magnetic circuit base is substantially a hollow body having a central projecting cylinder and fixing holes in its top rim. The vibration unit is composed of a funnel-shaped cone socket and a damper set, which are formed by combining a bottom end and a top end of the vibration unit respectively with a sound ring set or a piece of drum paper. The magnetic circuit base is mounted on the bottom rim of the casing. The vibration unit is jointed with the magnetic circuit base via the sound ring set arranged at the bottom end of the vibration unit to form a consolidated knockdown speaker.

Abstract: An improved loudspeaker having a dust cap (20), a cone (22) bellow-shaped surround (24), a basket (26), a magnet (28), a voice coil (30), and a spider (32), which can achieve longer excursions. The bellow-shaped surround is perpendicular to the cone (22) and the top of the basket (26). The shape and position of the surround allows the loudspeaker to achieve high sound pressure levels and reproduce precise sound.

Abstract: A speaker with a replaceable cone assembly. The motor assembly has its own basket, which is mounted in the enclosure. The cone assembly also has its own basket, which fits inside the motor basket. In the event of damage or malfunction in the cone or coil, the entire cone assembly is easily removed and replaced, while the motor assembly and the main basket remain undisturbed in the enclosure. Preferably, the speaker includes a pole with additional vents to improve heat dissipation. The pole has a pole cap with vent openings aligned with the secondary vent passages in the pole. The pole cap has a plug to occlude the front end opening of the central or primary vent passage in the pole. The top of the cap is domed to provide a guide surface for the former as the replacement cone assembly is inserted in the motor assembly.

Abstract: A speaker driver has a detachable motor and basket to allow attachment or separation of the motor assembly from the basket assembly. Two embodiments are disclosed, a thread-on detachable motor and a bolt-on detachable motor.

Abstract: A sound quality improving mechanism for a loudspeaker is proposed, in which a hollow annular component is deposited with a vibration-absorbing material therein. A plurality of conductive components are each disposed in a manner as to penetrate the hollow annular component in a diametrical direction, for allowing the hollow annular component to be held in place at a back end of a loudspeaker in a manner that the conductive components abut a peripheral surface of the back end of the loudspeaker, and for conducting vibration at the back end of the loudspeaker in a diametrical direction to the hollow annular component to be absorbed by the vibration-absorbing material, so as to improve the sound quality of the loudspeaker.

Abstract: A speaker apparatus is provided. A frame has a projecting portion projecting toward a diaphragm at the periphery of the frame. The diaphragm has a rising portion extending opposite to the frame from the periphery of the diaphragm and having an outside surface along an inside surface of the frame projecting portion. The outside surface of the rising portion is adhered to the inside surface of the frame projecting portion.

Abstract: An edge damper frame 18b is disposed in between a part of an outer peripheral surface 20a of a frame-cover 20 and a leveling surface 14c-1 of a frame 14. A slope 18e of a diaphragm 15 is extended from the edge damper frame 18b toward the frame 14 and provided alongside an outer side surface 14c-2 of a convex portion 14c of the frame 14.

Abstract: A speaker has a frame made of resin, a diaphragm provided in the frame, a voice coil mounted on the diaphragm. A pair of holes are formed under the diaphragm so as to be opened at an underside of the frame. A spring is connecting member provided in each of the holes to be projected from the underside of the frame, and connected to an end of the voice coil.

Abstract: An improved structure of amplifier, the amplifier consists of a frame, a base fixed at the bottom of the frame, one or more than one magnet, a spacer, a T-shaped iron, a package component containing one or more than one damper, a cone paper, a heat sink, a rubber edge, a dust cap, a voice coil, a fixed tube, the package component is placed inside the frame, the frames is featured by its one-body structure which is produce by injection molding and made of rubber material.

Abstract: A low frequency loudspeaker driver has polygonal diaphragm surfaces. In a first embodiment, the peripheral edge of a loudspeaker driver diaphragm is polygonal, preferably hexagonal or six sided, wherein each of the six peripheral sides are of equal length and meet in radiused or rounded corners. The hexagonal loudspeaker driver is supported within a matching hexagonal section truncated pyramid shaped basket having a hexagonal peripheral mounting flange. The hexagonal woofer of a first embodiment is adapted to be mounted on a planar baffle in a variety of densely packed arrays such that virtually no wasted baffle space is visible between the driver basket peripheral edges. The faceted hexagonal diaphragm shape provides an increase in cone surface area of approximately ten percent as compared to conventional frustoconical woofers having circular peripheral edges.

Abstract: A damper-mounting wall portion 40 which is provided on a small-diameter end of a trumpet-shape part of a frame 1 so as to extend in a diametrically inward direction is formed with an outside diameter which is larger than a diameter of a damper 8 which is adhered thereto. On a peripheral edge portion of the damper-mounting wall portion 40, there is integrally formed an annular eave-shaped barrier wall portion 41 which extends in an axial direction toward the front side of the frame 1 so as to enclose the circumference of the damper 8 at a position away from the periphery of the damper 8.

Abstract: An electrodynamic loudspeaker comprising a chassis (2), a three-dimensional diaphragm (8) and an electromagnetic actuator (6). The diaphragm is connected to the chassis by a first flexible connecting means (18) provided near a front part (8a) of the diaphragm and by a second flexible connecting means (20) provided near a back part (8b) of the diaphragm. The actuator includes a stationary actuator element (6a) fixed to the chassis and a translatable actuator element (6b) fixed to the diaphragm. When energized, both actuator elements magnetically co-operate with one another over an air gap (16). In order to realize a flat but powerful speaker, the device as such and the air gap are outside the area (26) enclosed by the diaphragm but within the space (24) between both connecting means.

Abstract: A surface-mounted electromagnetic sound generator generates sound by causing a vibration plate to vibrate by an electromagnet which includes a yoke and a coil housed in a case. The yoke has a magnetic-circuit board an outer circumferential portion of which is provided with a drawn portion, the drawn portion being imbedded in the case by insert-molding when the case is molded.

Abstract: A loudspeaker comprises a frame mounted to a motor structure, an upper suspension connected between the voice coil of the motor structure and the frame, and, a lower suspension extending from the voice coil to the frame in position to form a cavity between the top plate of the motor and the lower suspension. A flow path is formed at the juncture of the frame and top plate of the motor through which a comparatively high volume of air is circulated in and out of the cavity between the lower suspension and lower end of the frame in response to excursion of the voice coil during operation of the speaker. The flow path is positioned to direct such air flow over the top plate and at least along a portion of the voice coil to aid in cooling of these elements.

Abstract: The loudspeaker system having back pressure equalization apparatus functions to minimize the mismatch between the forward sound wave and the reverse sound wave that is generated by the loudspeaker by rotating the apertures that are formed in the basket to be in alignment with the corners of the enclosure. This rotation causes sound wave reflections within the loudspeaker enclosure at angles at other than 90 degrees to thereby redirect the acoustic reflections within the enclosure away from the back side of the loudspeaker cone. These reflections are also more likely to be absorbed by the sound absorbing material that is mounted on the inside of the enclosure rather than causing perturbations in the cone. In addition, the back edge of the baffle is releaved using a bevel, radius or other contour or apertures formed in the baffle to prevent the blocking of the basket apertures by the baffle.

Abstract: A loudspeaker clamping structure embodying an improved compression driver is provided. The clamping structure is configured to utilize a totality of the air contained within a cover coupled to a magnet structure of a loudspeaker. The clamping structure includes a compression driver that extends about the periphery of a membrane for clamping the membrane to the magnet structure. The cover includes an annular ring configured to engage the compression driver. At least one of the ring and compression driver is configured with a plurality of interstices along its length to provide interstitial gaps when the ring and compression driver are engaged.

Abstract: An improved surround design for a loudspeaker assembly is disclosed wherein the outside edge of the surround is attached to the outer edge of the loudspeaker's frame via a permanent or removable means. When removably attached, access to the mounting holes of the loudspeaker frame is accomplished by moving the roll to one side, prior to the attachment of the securing means. The method of attachment can vary, and in several embodiments includes the use of a annular o-ring, while in another attaching embodiment the use of a locking finger is provided.