Abstract: A multi-magnet speaker is disclosed. The multi-magnet speaker includes a frame defining a hollow space, a magnetic system defining a yoke and a plurality of magnetic gaps positioned in the hollow space, a diaphragm mounted on the frame and a plurality of coils attached to the bottom of the diaphragm. The diaphragm includes a plurality of vibrating membranes each defining a dome part and an arcuate portion radially extending from the periphery of the dome part. Each of the coils is received in the corresponding magnetic gap to drive the corresponding vibrating membrane to vibrate.

Abstract: An acoustic transducer includes a diaphragm defining a center portion and a supporting portion surrounding the center portion and a coil attached to the diaphragm and defining a pair of leading wires. The center portion defines a lower surface connected to the coil, an upper surface opposite to the lower surface, and at least a pair of protrusion portions extending from the lower surface toward the upper surface for receiving the leading wires of the coil.

Abstract: An elastically deformable suspension member for use in a speaker to establish a sufficient support to a cone is disclosed. The suspension member has an inner diameter portion for mounting the cone, an outer diameter portion spaced around the inner diameter portion for fastening to a basket, a first annular convex surface portion concentrically arranged between the inner diameter portion and the outer diameter portion and constituting a summit, and a number of second annular convex surface portions symmetrically arranged at two opposite lateral sides of the first annular convex surface portion between the inner diameter portion and the outer diameter portion and respectively constituting summit ridges having a height below the summit and above the elevations of the inner diameter portion and the outer diameter portion.

Abstract: A transducer membrane enhances sound reproduction. Curved portions of the membrane periphery contribute to the enhanced sound reproduction. The transducer membrane may add or improve sound reproduction capability in cell phones, gaming systems, personal data assistants, or other devices.

Abstract: A membrane for an electrodynamic sound transducer, particularly a membrane for an AMT loudspeaker, has a meandering shape and is disposed in an air gap between two pole plates. The membrane has a plurality of opposite flanks and a plurality of wave crests and/or wave troughs. In order to avoid parasitic oscillations, at least one supporting element is provided which stabilizes the position and/or the orientation of at least one wave crest and/or wave trough.

Abstract: A low profile speaker that is designed to substantially eliminate wobble of the bobbin and voice coil during operation with two different electromagnetic motor designs. In each design there is an added feature to of a downward extension of the outer edge of the cone that bottoms out on the bottom surface of the frame before the bottom edge of the bobbin strikes the bottom of the air gap thus preventing damage to the bobbin and voice coil when the voice coil is overdriven downward. Additionally, there are two different bobbin and voice coil cooling feature for use with electromagnetic motors that utilize a Tyoke construction.

Abstract: A loudspeaker diaphragm having a small overall height dimension, in which a dome portion has a sufficient rigidity and which is capable of realizing a stable loudspeaker operation, wherein the loudspeaker diaphragm can realize a desirable sound reproduction without noise, or the like, with a frequency response that is flat over a wide range.

Abstract: 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.

Abstract: A loudspeaker includes a first bar magnet having a longitudinal direction, a second bar magnet having a longitudinal direction parallel to the longitudinal direction of the first bar magnet, a third bar magnet forming a second magnetic gap between the first bar magnet and the third bar magnet, a diaphragm arranged to vibrate in a vibrating direction, a case accommodating the first bar magnet, the second bar magnet, the third bar magnet, and the diaphragm , and the voice coil fixed to the diaphragm and located in the first and second magnetic gaps. The second bar magnet has a longitudinal direction parallel to the longitudinal direction of the first bar magnet, and has both ends in the longitudinal direction. The third bar magnet has a longitudinal direction parallel to the longitudinal direction of the first bar magnet, and has both ends in the longitudinal direction. The diaphragm is located between the first and second bar magnets and between the first and third bar magnents.

Abstract: A ring-shaped surround for a loudspeaker is disclosed, in the form of a membrane formed in a shape that, when relaxed (i.e. when not being driven), has a cross sectional shape with a first portion extending in a radial direction for a first distance, a second portion extending in an axial direction for a second distance, and a third portion extending in a radial direction for a third distance, the first and second portions being connected by a first flexible join, and the second and third portions being connected by a second flexible join, the first join having a first radius of curvature that is shorter than at least one of said first and second distances, the second join having a second radius of curvature that is shorter than at least one of said second and third distances. Thus, the surround has a Z-shape, with a first radially extending portion, and a relatively sharp bend leading to an axially-extending portion.

Abstract: A speaker device has a diaphragm, a static part vibratably supporting the diaphragm in a vibration direction and a driving part applying vibration to the diaphragm in response to an audio signal. The driving part is provided at the static part. The driving part includes a magnetic circuit forming a magnetic gap in a direction different from the vibration direction of the diaphragm, a voice coil vibrating along the magnetic gap, and a vibration direction converter part direction-converting the vibration of the voice coil and transmitting the vibration to the diaphragm. The vibration direction converter part includes a link body angle-converting a link part formed between the voice coil and the diaphragm. The static part includes an outer peripheral frame part surrounding the diaphragm and a bridge part bridging the inside of the outer peripheral frame part.

Abstract: A loudspeaker driver that includes a suspended diaphragm and at least one voice coil disposed lateral to the suspended diaphragm, suspended in a magnetic field and coupled to the diaphragm.

Abstract: A diaphragm, a static part vibratably supporting the diaphragm in the vibration direction, and a driving part provided at the static part and applying vibration to the diaphragm in response to an audio signal are provided, and the driving part includes a magnetic circuit forming a magnetic gap, a voice coil vibrating in a different direction from the vibration direction of said diaphragm in response to an inputted audio signal and a rigid vibration direction converter part direction-converting the vibration of the voice coil and transmitting the vibration to the diaphragm, and the vibration direction converter part is connected to an attaching counterpart including the diaphragm and the voice coil and includes a hinge part in the proximity of the attaching counterpart, and a contact avoiding part avoiding contact with the hinge part is formed on the face side of the attaching counterpart in the proximity of the hinge part.

Abstract: The present invention discloses a vibrating system of flat-plate electrodynamic loudspeaker, which comprises a flat-plate vibrating plate and a voice coil mounted under the vibrating plate. The vibrating system is characterized in that the thickness of the vibrating plate within the voice coil is not more than ½ of that of the vibrating plate outside the voice coil. Alternatively, the vibrating plate within the voice coil can be replaced by a vibrating diaphragm. The thin plate within the voice coil according to the present invention can provide compensation for high frequency response, widen frequency band, and reduce the overall height of voice coil and vibrating plate. According to the present invention, a thin flat-plate loudspeaker that almost cover the full audio frequency bands can be designed, thereby producing a thin flat-plate full frequency speaker system to meet the demand of market.

Abstract: A diaphragm for a planar speaker and a planar speaker having a long-term stability and a high reliability and exhibiting a flat sound pressure frequency property. The diaphragm for a planar speaker includes a voice coil formed by winding a wire conductor, two adhesive layers sandwiching the voice coil therebetween, and bases bonded to the two adhesive layers on the side opposite to the voice coil. The planar speaker employs the diaphragm.

Abstract: A speaker capable of suppressing deterioration of acoustic efficiency while allowing miniaturization of the speaker includes a first unit (20) and a second unit (21) each of which outputs sound. The first unit (20) includes: a diaphragm (25) which vibrates back and forth to radiate sound; and plural suspensions (26a, 26b, 26c, 26d) which support, at different positions, an outer periphery of the diaphragm (25). At least one of air passages (35a, 35b) for channeling sound from the second unit (21) to the outside is provided between the plural suspensions (26a, 26b, 26c, 26d).

Abstract: A flat speaker device capable of emitting loud reproduced sound with a relatively simple configuration is provided. The speaker device includes a diaphragm, a frame supporting the diaphragm vibratably in the vibration direction, a magnetic circuit disposed in the frame, and a driving member for driving the diaphragm. The driving member includes a voice coil movably disposed in a magnetic gap of the magnetic circuit, a driving part formed movably in a direction different from the vibration direction of the diaphragm, and an angle conversion and transmission part, one end of which is angle-variably joined to the driving part and another end of which is angle-variably joined to the diaphragm. The angle conversion and transmission part has rigidity and is obliquely disposed with respect to each of the vibration direction of the diaphragm and the moving direction of the driving part.

Abstract: Disclosed is a loudspeaker suspension structure having asymmetrical grooves. In an aspect, an apparatus includes a loudspeaker suspension structure having grooves, each extending from an inner circumferential border, to an outer circumferential border, at least one groove having a groove depth that varies asymmetrically from the inner circumferential border to the outer circumferential border.

Abstract: A speaker 1 includes: a frame 4; a magnetic circuit 2; and a vibrating unit 3. The magnetic circuit 2 is attached to the frame 4. The vibrating unit 3 is received in the frame 4, and includes a drive cone 14 and a diaphragm 15 vibrated by the magnetic circuit 2. A space surrounded by the drive cone 14, the diaphragm 15 and the frame 4 is sealed. An edge unit 17 is attached to an outer edge of the drive cone 14. The edge unit 17 is in an arc sectional shape, and integrally includes two roll parts 47 arranged coaxially to each other.

Abstract: A speaker of the present invention includes the following: a diaphragm that includes an inner periphery coupled to a voice coil, and a corrugation provided at the intermediate position between the inner periphery and an outer periphery; a speaker edge for supporting the outer periphery of the diaphragm; and a damping member attached to an outer peripheral part of the diaphragm outside the vicinity of an outer periphery of the corrugation. The effective vibration area of an inner peripheral part of the diaphragm inside an inner periphery of the corrugation is substantially half or less of the total effective vibration area. The damping member is configured as a damping portion by extending an overlap portion of the speaker edge overlapping with the diaphragm to the vicinity of the outer periphery of the corrugation.

Abstract: The present invention provides a loudspeaker diaphragm and an electrodynamic loudspeaker of an elongated shape being shorter in the minor-axis direction than in the major-axis direction, which have a desirable sound reproducing capability with a high efficiency and are not significantly influenced by divided vibrations of an elongated loudspeaker diaphragm, and which are suitably installed in devices such as display devices.

Abstract: 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.

Abstract: A speaker assembly includes a frame and a surround that suspends a diaphragm from the frame. An outer portion of the surround is disposed, dimensioned, and configured to permit the mounting of the surround to the frame such that the surround, itself, does not need to include an outwardly extending flange and/or clamp. Rather, the outer portion of the surround is generally disposed on the frame, with the mounting surface of the outer portion of the surround extending inward relative to the outer periphery of the surround. A reinforcement member is cooperatively structured with the surround to reinforce the surround during operation of the speaker assembly. The reinforcement member has a ringed configuration that includes a plurality of offsets each structured to facilitate attachment of the reinforcement member to the frame.

Abstract: A flat speaker device capable of emitting loud reproduced sound with a relatively simple configuration is provided. The speaker device includes a diaphragm, a frame supporting the diaphragm vibratably in the vibration direction, a magnetic circuit disposed in the frame, and a driving member for driving the diaphragm. The driving member includes a voice coil movably disposed in a magnetic gap of the magnetic circuit, a driving part formed movably in a direction different from the vibration direction of the diaphragm, and an angle conversion and transmission part, one end of which is angle-variably joined to the driving part and another end of which is angle-variably joined to the diaphragm. The angle conversion and transmission part has rigidity and is obliquely disposed with respect to each of the vibration direction of the diaphragm and the moving direction of the driving part.

Abstract: A magnetic circuit part of a loudspeaker is formed of a plate, a magnet, and a yoke. A step is disposed in the plate that comes into contact with a disc-like magnet and forms a magnetic gap. A loudspeaker is provided where the step moves a voice coil away from the leakage magnetic field of the yoke, the influence of the leakage magnetic field is eliminated even when the output is large, the distortion is small, and the sound quality is high.

Abstract: A loudspeaker diaphragm includes a tapering edge region. Thus, it is possible to prevent or considerably reduce wave reflection and uncontrolled wave propagation caused thereby in a cheap and effective manner.

Abstract: In a piezoelectric electroacoustic transducing device which is to be incorporated in an electronic apparatus such as a portable telephone, and which is used as a sound source, the sound pressure of the low-frequency range is improved, the productivity is improved, and acoustic characteristics are stabilized. A piezoelectric electroacoustic transducing device 10 has: a frame 15; a piezoelectric vibrator 11 in which piezoelectric elements 12A, 12B are bonded to a metal plate 13; and a plate- and ring-like support member 14 which supports a peripheral portion of the piezoelectric vibrator 11 on the frame 15. A step 14C corresponding to the thickness of the metal plate 13 is disposed in the support member 14, and the metal plate 13 is adhered to the inside of the step 14C in an embedded manner.

Abstract: A speaker having smaller distortion and driven at higher efficiency is disclosed. The speaker includes a frame, a magnetic circuit supported by the frame, a voice coil unit placed movable with respect to magnetic gap provided to the magnetic circuit, a diaphragm of which outer rim is coupled to the frame via a first edge, and of which inner rim is coupled to the voice coil unit, and a damper placed on the magnetic circuit side with respect to the diaphragm, and which damper has an outer rim coupled to the frame and an inner rim coupled to the voice coil unit. The outer rim of the damper is coupled to the frame via a second edge, which includes a first protrusion protruding toward the diaphragm and a second protrusion protruding oppositely to the first protrusion.

Abstract: A surround that is generally arched in shape and that includes a radial exterior flange that extends downward from exterior side of the arched portion of the surround and that adhesively attaches to the inner wall or edge of the mounting ring of the frame of the loudspeaker.

Abstract: A diaphragm unit is arranged to be used in a loudspeaker including a frame. The diaphragm includes a diaphragm and an edge joined to an outer periphery of the diaphragm. The diaphragm extends in a longitudinal direction and has a first center line extends along the longitudinal direction. The edge has an outer periphery being arranged to join to the frame, and an inner periphery joined to the outer periphery of the diaphragm. The edge has a convex surface having substantially a semi-circular cross section. The convex surface of the edge has grooves provided therein. The grooves extend from the inner periphery of the edge to the outer periphery of the edge. The grooves have cross sections each having a U-shape or a V-shape, and are arranged symmetrically about the first center line of the diaphragm. This diaphragm unit provides an elongated loudspeaker reproducing bass sounds with small distortions.

Abstract: A loudspeaker system includes a loudspeaker enclosure having an inside space, a loudspeaker provided on the loudspeaker enclosure, a first diaphragm which has one of ends fixed to a surface of the loudspeaker enclosure and the other end, a second diaphragm which has one of ends fixed to the surface of the loudspeaker enclosure and the other end, a coupling portion having an elasticity, and coupling the other end of the first diaphragm to the other end of the second diaphragm, an opening structure provided in the surface of the loudspeaker enclosure, and a sealing member provided to a portion among the first and second diaphragms, the coupling portion and an edge part of the opening structure, and closing the inside space to hold an airtightness of the loudspeaker enclosure in a state that the first and second diaphragms can be vibrated.

Abstract: A support structure for supporting and protecting the diaphragm of loudspeaker includes a first elastomer which has a first interface with a camber shape, a second elastomer which has a second interface with a complemental shape of the first interface, the first elastomer and the second elastomer combine together from both sides of the support part of the loudspeaker diaphragm. The separate support structure in the present invention is fit for many kinds of loudspeakers and propitious to increase the technical characteristics of loudspeakers.

Abstract: A loudspeaker includes a movable diaphragm, a resilient centering device for centering and guiding the movement of the diaphragm, and a magnet system for controlling the movement of the diaphragm, where the diaphragm is positioned between the magnet system and the resilient centering device.

Abstract: To provide a speaker unit and a portable information terminal suppressing a decrease in a vibration area and a reduction in a diaphragm edge portion path length caused along with miniaturization and slimming-down. A speaker unit includes a diaphragm member which has a first convex portion at an outer peripheral portion, a voice coil fixed to the diaphragm member, a magnet disposed to be spaced from the voice coil, and a frame which supports the magnet and has a second convex portion on a more inner peripheral side than the first convex portion. The diaphragm member is attached to the frame such that an inner peripheral surface of the first convex portion faces an outer peripheral surface of the second convex portion.

Abstract: An electroacoustical transducer includes a bobbin, a first acoustic radiator coupled to the bobbin through a first surround having a mechanical compliance, a second acoustic radiator generally rigidly coupled to the bobbin, and a basket. The first acoustic radiator is coupled to the basket through a second surround, and the second acoustic radiator is coupled to the basket through a third surround. The first surround is constructed to cause the first acoustic radiator to move out of phase with the second acoustic radiator relative to the bobbin when actuated by the bobbin at acoustic frequencies at and above a resonant frequency of the first acoustic radiator.

Abstract: Contemplated planar magnetic microphones have a magnet and diaphragm arrangement such that substantially homogenous vertical and high horizontal magnetic flux density is realized in the inter-magnet space. Most preferably, the diaphragm is disposed in the inter-magnet space and includes a voice coil covering a significant fraction of the active portion of the membrane. In further especially preferred aspects, the membrane is sufficiently strong and tensioned to allow a large elastic excursion in the inter-magnet space. Consequently, contemplated planar magnetic microphones provide exceptionally large dynamic range without compression and/or distortion and can be easily configured to operate in an environment that is subject to moisture, rain, or to even operate in a submerged environment. Moreover, contemplated microphones can be used as speakers at even high SPL without reconfiguration.

Abstract: A speaker unit adaptable to limited mounting space, allowing reduction in the lowest resonance frequency, and realizing higher sound pressure and smaller distortion is provided. A diaphragm includes a trunk portion 43 to which a coil 5 is attached, and an edge portion 42 surrounding an outer circumference 43a of trunk portion 43 in plan view. A reinforcement sheet is attached to the trunk portion. An outer circumference 42a of edge portion 42 includes first and second edge straight sections LE1 and LE2, and an edge curve section CE. Each of the first and second edge straight sections LE1 and LE2 extend in the major axis direction and minor axis direction of edge portion 42. An edge curve section CE joins the first and second edge straight sections LE1 and LE2 together. Each of trunk portion 43 of the diaphragm and reinforcement sheet is transparent to light having a wavelength in the visible light region.

Abstract: An acoustic conversion device includes: a driving unit including a pair of magnets disposed so as to face each other, a yoke to which the pair of magnets are attached, a coil to which driving current is supplied, a vibrating portion which vibrates when driving current is supplied to the coil, and an armature disposed between the pair of magnets with the vibrating portion passed through the coil; and a diaphragm unit including a holding frame having an opening, a resin film adhered to the holding frame in a state covering the opening of the holding frame, a diaphragm held on the inner side of the holding frame in a state adhered to the resin film, and a beam portion of which the tip portion formed integrally with the diaphragm is combined with the vibrating portion of the armature, for propagating the vibration of the vibrating portion to the diaphragm.

Abstract: An acoustic conversion device includes: a driving unit including a pair of magnets, a yoke, a coil, a vibrating portion which vibrates when driving current is supplied to the coil, and an armature disposed between the pair of magnets with the vibrating portion being passed through the coil; and a diaphragm unit including a holding frame having an opening, a resin film adhered to the holding frame, a diaphragm held within the holding frame, and a beam portion for propagating the vibration of the vibrating portion to the diaphragm; with the beam portion being combined with one edge side of the diaphragm, a predetermined gap being formed between the other edge of the diaphragm, and the inner face of the holding frame, a reinforcing member being provided to the predetermined gap, and the diaphragm being combined with the holding frame by the resin film and the reinforcing member.

Abstract: A loudspeaker includes a frame, a magnetic circuit supported by the frame, voice coil body provided movably in relation to a magnetic gap provided at the magnetic circuit, a diaphragm having an outer rim being joined via a first edge to the frame and an inner rim being joined to the voice coil body, and a damper located towards the magnetic circuit from the diaphragm. The damper has an inner rim joined to the voice coil body. The damper has an outer rim joined via a second edge to the frame. The second edge protrudes towards the diaphragm or in a direction opposite to the diaphragm. The damper includes a first protrusion protruding towards the diaphragm and a second protrusion protruding in a direction opposite to a direction in which the first protrusion protrudes. A protrusion out of the first and second protrusions is closest to the second edge among the protrusions.

Abstract: The invention relates to a loudspeaker system in which the diaphragm of the speaker has a defined material thickness particularly in the edge region thereof and comprises a suspension which is axially symmetrical about the mechanical rest position of said diaphragm and is formed by one, preferably two identical mirrored components, characterized in that the sound emission towards the rear is performed to at least 50 percent by the inner space of a magnetic system. The invention further relates to the use of the loudspeaker system as loudspeaker boxes or in radios, television screens, radio receivers, hand-held radio devices, measurement receivers, mobile telephones and headphones or the like.

Abstract: A speaker includes a sound source, a rod-like member whose base end is in contact with the sound source, and a pair of flexible wing members whose ends are attached to the tip of the rod shape member, and whose other ends are free.

Abstract: A loudspeaker including a frame, a movable diaphragm that oscillates, and a suspension for mounting the diaphragm to the frame, where the suspension comprises a flexible surround having a substantially enclosed space where at least a portion of the flexible surround is air permeable.

Abstract: A frame has a notch having an opening at a side plane of the frame. A diaphragm is vibratably attached to one plane of the frame. A voice coil is attached to the diaphragm. A terminal is attached to the other plane of the frame. A lead is connected to the voice coil, drawn from one plane to the other plane through the notch, and connected to the terminal. One of intersection points at which a normal to the side plane that passes through the position of the lead in the notch and the side plane intersect that is closest to the opening and the lead in the notch are intervened therebetween by the frame.

Abstract: A multifunctional micro speaker including a frame; a diaphragm having an outer circumference portion fixed to the frame; a voice coil fixed to a lower surface of the diaphragm; a suspension fixed to the frame and having a predetermined elasticity; a yoke fixed to the suspension and including a receiving groove having a concave shape; a permanent magnet fixed to a bottom surface of the receiving groove; and a plate fixed to an upper surface of the permanent magnet, wherein a through hole is vertically formed through a central portion of a magnetic circuit including the yoke, the permanent magnet and the plate. The multifunctional micro speaker includes the through hole formed in a magnetic circuit, and thus, a vibration displacement of the magnetic circuit and a damping coefficient of the diaphragm may be controlled.

Abstract: A micro speaker including a frame; a yoke fixed to the frame and including a receiving groove; a permanent magnet spaced apart from an inner lateral wall of the receiving groove of the yoke, and fixed to a bottom surface of the yoke; a plate fixed to an upper surface of the permanent magnet, spaced apart from the inner lateral wall of the receiving groove of the yoke, and fixed to the yoke; a diaphragm having an outer circumferential portion fixed to the frame; a base film fixed to a lower surface of the diaphragm and including a first coil that has a planar shape and is printed to have a coil pattern; and a second coil that is formed by winding a wire, has an upper end portion fixed to a lower surface of the base film, extends downwards from the upper end portion, and is electrically connected to the first coil.

Abstract: A loudspeaker includes a chassis, a diaphragm, a motor system, a first suspension and a second suspension. The chassis has an inner periphery and an outer periphery. The diaphragm has an inner periphery and an outer periphery. The motor system has a magnet assembly connected to the inner periphery of the chassis, and a voice coil assembly connected to the diaphragm. The first suspension has an inner periphery connected to the outer periphery of the diaphragm, and an outer periphery connected to the outer periphery of the chassis. The second suspension has an inner periphery connected to at least one of the magnet assembly and the inner periphery of the chassis, and an outer periphery connected to the diaphragm between the inner and outer periphery.

Abstract: A frame includes terminals. A diaphragm is supported by a frame so as to vibrate in one direction. A magnet is fixed to frame. A voice coil includes a winding portion and wire portions. Winding portion is fixed to diaphragm so as to receive a magnetic field from magnet. Wire portions and serve to electrically connect wiring portion and terminals, respectively. Wire portions have bending portions bent in one direction from winding portion towards terminals.

Abstract: According to an embodiment of the invention, there is provided a speaker apparatus includes: a voice coil bobbin; and a diaphragm that is vibrated by the voice coil bobbin, the diaphragm including an edge portion at an outer circumference of the diaphragm, the edge portion including at least two ridge portions protruding forward.

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.