1322results about "Non-planar diaphragms/cones" patented technology

An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap there between, the magnetic circuit comprising one magnet. The magnet can either be positioned in the center of the magnetically conductive material so as to form two gaps. In an alternative embodiment the magnet is attached to the magnetic conductive material forming only one gap. The transducer further comprises a diaphragm and a coil system having electrically conducting paths fastened to the diaphragm. The coil system has portions of its paths situated in the gap. The transducer may be supplied with an additional diaphragm and coil system positioned on the opposite side of the magnetic circuit. In a preferred embodiment the transducer is rectangular. The transducer is suited for integration into miniature components such as mobile communication equipment and hearing aids. Embodiments of the transducer are suited for side-firing or side-shooting applications such as in mobile phones.

The invention relates to a micro-speaker with a second suspension made of highly resilient material installed inside of the speaker. The speaker is able to provide high level acoustic output with low distortion rate in a wide frequency range with a very small and slim structure and it may prevent a disconnection of a lead connecting the voice coil and the electrode. The speaker includes a yoke, a permanent magnet, a plate, a vibration plate integrated with a first suspension, a voice coil, a frame and a protector. The speaker further comprises a second suspension made of highly resilient material installed between the plate and the vibration plate, and is characterized in that the voice coil is attached to the lower surface of the second suspension and the vibration plate is attached to the upper surface of the second suspension and the vibration plate is attached to the upper surface of the second suspension and the outer periphery of the second suspension is fixed to the frame.

The invention describes the incorporation of surface irregularities into a loudspeaker diaphragm to control the resonances of diaphragm. Through the use of the described resonance control techniques, a single loudspeaker driver is able to offer excellent performance over a wide range of the audio spectrum. The randomness of the selected features is constrained within a set of boundary conditions to accomplish a balance of achieving the desired performance, as well as ensure that the device is practical to manufacture.

A diaphragm provided by the present invention comprises a vibration part and a spherical top part fixed on the vibration part, and the vibration part is made of a rubber compound and comprises a folding ring part, a first fixing part extending from the inner side of the folding ring part and a second fixing part extending from the outer side of the folding ring part. The spherical top part is fixed at the first fixing part, and the folding ring part comprises a plurality of arc-shaped folding ring units which recess along the vibration direction of the diaphragm, wherein the recessing directions of the two adjacent folding ring units are reverse. The present invention also provides a sounding device which comprises a basin stand and the above diaphragm provided by the present invention and fixedly supporting the basin stand. Compared with the prior art, the diaphragm of the present invention is good in consistency, small in distortion and high in stability, and the sounding device applying the diaphragm is good in acoustic performance.

The present invention is directed to a speaker using lightweight, highly rigid diaphragm having excellent frequency characteristic and improving resistance to environment (including resistance to UV and resistance to fading). For this end, the speaker utilizes a cone-shaped diaphragm made from foamed or cellular resin such as polyethylene terephthalate (PET) resin or polyethylene naphthalate (PEN) resin with 30 μm average cell size. The use of such cone-shaped diaphragm is effective to improve sound quality of the speaker.

The invention discloses a vibrating diaphragm and a micro acoustic generator equipped with the vibrating diaphragm, and relates to the technical field of electroacoustic products. The vibrating diaphragm has a multilayer composite structure which comprises thermoplastic elastomer layers and adhesive film layers which are alternately stacked together. According to the vibrating diaphragm and the micro acoustic generator equipped with the vibrating diaphragm, the technical problems in the prior art that a micro loudspeaker has poor F0 stability and high total harmonic distortion can be solved. The vibrating diaphragm and the micro acoustic generator equipped with the vibrating diaphragm are low in total harmonic distortion and damping coefficient, higher in F0 stability and high in sound quality so that the requirements of people for the high sound quality of electronic equipment can be met.

The invention discloses an MEMS microphone with a fold-type vibrating film and a manufacturing method of the microphone. A medium sacrifice layer with a concave-convex surface is used, the vibrating film with the corresponding concave-convex fold structure is formed on the medium sacrifice layer, so that the internal stress of the vibrating film is released, the rigidity of the vibrating film is lowered, and the flexibility of the microphone is increased. The vibrating film is provided with an anti-adhesion protruding structure which can prevent the vibrating film from being adhered to a back plate in a damp environment. The layered aligning marks of the back plate are used for aligning during back cavity forming, a double-face aligning photo-etching machine is not needed, the manufacturing process is allowed to be more compatible with a CMOS process, microphone structure precision is guaranteed, and the manufacturing microphone is simple in process, high in process consistency, low in manufacturing cost, and high in flexibility.

A loudspeaker diaphragm affixed with a coil includes an edge portion located outside of a portion affixed with the coil and a center portion located inside of the portion affixed with the coil. The center portion is provided thereon with ribs. With these ribs, the height of the center portion can be limited to the height of the ribs. Therefore, it is possible to save a space of a loudspeaker where the loudspeaker diaphragm is placed, thereby slimming down the loudspeaker. Furthermore, with these ribs, the rigidity of the center portion can be improved without using a conventional solution of forming, for example, a dome shape on the center portion.

A speaker has an acoustic diaphragm, and an actuator that is driven based on an acoustic signal. The actuator has a transmission portion that is directly or indirectly attached to the acoustic diaphragm and transmits a displacement output of the actuator to the acoustic diaphragm. The actuator vibrates with the acoustic diaphragm by at least its component of the vibration along a plane of the acoustic diagram.

A variety of loudspeaker arrangements may have any of multiple adjacent magnetic circuits, single magnetic circuits, an improved loudspeaker voice coil assembly, multiple voice coil windings (124-127, 315-317), and commutated current. The radial direction of flux may alternate at adjacent poles and may have a controller that commands the current through each of the windings. The position of the moving components may be measured or inferred by the controller (213). An encoding track (318a) applied to the surface of the assembly may allow the assembly to function as part of a position transducer to permit appropriate action based on position. Calculated or sensed actual position may be used to determine the relative current in each of the windings and the controller may have compensation such as a motion control algorithm, thermal monitoring, and management of the driver. The voice coil assembly (305c) may have foil conductors applied to a substrate to connect and interconnect a single or multiple voice coil windings with minimal effect on the magnetic gap (303b) width.

A speaker has diaphragm (16) and suspension holder (19) disposed on the back surface of the diaphragm. In the diaphragm, the part from a bent section (21) disposed between the outer periphery and the inner periphery to the outer periphery is formed in a conical shape. The diaphragm is coupled to the suspension holder through the bent section of the diaphragm. This configuration can omit a damper causing the nonlinearity and asymmetry of suspension, reduce the harmonic distortion of the speaker, improve the power linearity, and improve the performance of the speaker. Even a flat shape can secure sufficient rigidity, so that securing the rigidity of the diaphragm does not require large thickness of the diaphragm and downsizing and low profile can be realized.

In one embodiment, a method of manufacturing a semiconductor device includes oxidizing a substrate to form local oxide regions that extend above a top surface of the substrate. A membrane layer is formed over the local oxide regions and the top surface of the substrate. A portion of the substrate under the membrane layer is removed. The local oxide regions under the membrane layer is removed.

The present invention relates to a plate type speaker adapted to radiate sound by transforming horizontal vibration for vibrating a side of a diaphragm into vertical vibration of the diaphragm. The plate type speaker of the present invention comprises a plate-shaped diaphragm for receiving horizontal vibration to generate vertical vibration; a base frame having a fixing portion to which one end of the diaphragm is coupled; a voice coil plate that has one end connected to the other end of the diaphragm, is mounted on the base frame to horizontally vibrate and has a voice coil wound on either or both of surfaces thereof, and a magnetic body that has opposite polarities at positions spaced apart by predetermined distances from top and bottom surfaces of the voice coil plate and is coupled to the base frame. According to the plate type speaker of the present invention, it is possible to manufacture a plate type speaker with a thickness reduced through transformation of vibration at a side of a diaphragm, which is caused by horizontal vibration of a voice coil plate, into vertical vibration of the diaphragm. Accordingly, the plate type speaker of the present invention can be easily applied to small appliances requiring an audio system, and it is also possible to manufacture plate type speakers in various forms with a plurality of diaphragms depending on the structure of a base frame.

A loudspeaker diaphragm having light weight and an excellent balance between a rigidity and an internal loss, and a simple and inexpensive method for manufacturing such a diaphragm are provided. A loudspeaker diaphragm according to the present invention includes a base layer having a woven fabric of a polyethylene naphthalate fiber impregnated with a thermosetting resin, and optionally a thermoplastic resin layer and / or a thermoplastic elastomer layer. The polyethylene naphthalate fiber is preferably an untwisted fiber. A fiber / resin ratio in the base layer is preferably in the range of 60 / 40 to 80 / 20. Preferably, the thermoplastic resin layer has a finely foamed structure and an average diameter of a cell in the finely foamed structure is 10 to 60 mum.

The speaker has a diaphragm main body 30 supported resiliently on a frame 23 via an edge portion 31 around its outer circumference, and the groove ribs 35 integrally formed in the edge portion 31, wherein a regulation member 37 for partially improving a flexural strength of the edge portion 31 is provided on a part of the front or back face of the edge portion 31.

A micro electrical mechanical system includes a membrane structure and a backplate structure. The backplate structure includes a backplate material and at least one pre-tensioning element mechanically connected to the backplate material. The at least one pre-tensioning element causes a mechanical tension on the backplate material for a bending deflection of the backplate structure in a direction away from the membrane structure.

A speaker diaphragm or a dust cap formed by injection molding a mixture at least containing a resin material and a fiber material. The speaker diaphragm or the dust cap combines the advantages of both a paper diaphragm and a resin diaphragm. The advantage of a paper diaphragm is a large degree of freedom in setting physical properties. The advantages of a resin diaphragm are being excellent in moisture resistance reliability, strength, external appearance, productivity and dimension stability.

The present invention provides a dome-shaped diaphragm fabricated based on a film base of polyethylene terephthalate resin film. The diaphragm includes a first vibrating part of a dome shape or a flat shape, and a second vibrating part of an annular shape. The second vibrating part includes a peripheral portion of the film base provided around a central portion of the film base. The first vibrating part includes the central portion of the film base, a thermosensitive adhesive resin film, provided on the central portion, and a fiber sheet made of a woven fabric using carbon fiber or an embossed nonwoven fabric. The fiber sheet is layered over the central portion with the thermosensitive adhesive resin film interposed therebetween.

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.

A speaker that is designed to substantially eliminate wobble of the voice coil during operation, and thus remove that source of distortion and early failure of the speaker. This is accomplished with the creation of triangular ring that extends upward from the top edge of the voice coil bobbin with that ring mating with a flat diaphragm at a right angle directly above the top edge of the bobbin. The outer edge of the diaphragm connects to the inner edge of the surround at the point where a sloping side of the “triangle” is also connected and slopes down to the top edge of the bobbin where the opposite end is connected. The outer portion of the diaphragm provides the third side of the triangle.

A microphone is formed to have a diaphragm that is configured to improve signal to noise ratio. To that end, the microphone has a backplate having a hole therethrough, and a diaphragm movably coupled with the backplate. The diaphragm has a bottom surface (facing the backplate) with a convex portion aligned with the hole in the backplate.

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, the second diaphragm layer being made of not-yet-molded woven fabric or woven fabric molded previously into a predetermined shape of a diaphragm, and injecting the synthetic resin material which is to be molded into the first diaphragm layer into the mold for injection molding, thereby forming the first diaphragm layer integrally with the second diaphragm layer.

A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.

A high efficiency loudspeaker without a damper is provided. The loudspeaker includes magnetic circuit having a magnetic gap and a voice coil member, which has movable coil, disposed in the magnetic gap of the magnetic circuit. The loudspeaker also includes a diaphragm, whose inner peripheral part is linked with the voice coil member, outside the magnetic gap and a frame linked with an outer peripheral part of the diaphragm via a first edge. An inner peripheral part of a suspension holder is linked with the voice coil member at a linked position which is closer to the magnetic circuit than a linked position of the diaphragm and the voice coil member. An outer peripheral part of the suspension holder is linked with a frame via a second edge. The first edge and the second edge are substantially symmetrical with each other about a median of a first edge and a second edge.

An electroacoustic transducer includes a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween. The magnetic circuit includes a magnet inducing a magnetic field in the gap, the magnet having a surface constituting one of the opposed surfaces. The magnetic circuit further includes a diaphragm and a coil having electrically conducting paths secured to the diaphragm. The coil has portions of its paths situated in the gap.

A symmetrically loaded, shallow suspension speaker with stiff diaphragm having a minimum dimension that is greater than the diameter of the magnet that drives the diaphragm thus allowing the suspension of the diaphragm to extend nearly to the bottom of the speaker basket on the maximum inward excursion of the voice coil and diaphragm such that the suspension operational depth is not the limiting factor of the overall height of the speaker. The elements of the suspension system are designed to maximize the spacing between the inner and outer portions of the suspension, thus minimizing the possibility of wobble in the speaker. The speaker design maximizes air movement in a given mounting depth with a configuration that optimizes the operation of the moving parts that complements the fixed mechanical structural configuration of the non-moving parts in either an overhung or underhung configuration. The design also accommodates user replacement of the voice coil or cone.