Abstract: A speaker having improved sound quality by reducing a phase difference and also having an outstanding outward appearance is provided. In a speaker comprising a vibrating element 10, a drive unit 20 for vibrating the vibrating element 10, and a frame 30 supporting the vibrating element 10 and the drive unit 20, the vibrating element 10 comprises a front face region 10A which forms a continuously curved face having a convex-shaped cross-sectional portion T1 formed in its central portion and a concave-shaped cross-sectional portion T2 formed around the portion T1, and a connecting region 10B located on the rear side of the front face region 10A and connected to the drive unit 20.

Abstract: A speaker device prevents “squeaking” based on the difference between propagation speed of a vibration propagated through a center cap and propagation speed of a vibration propagated through a diaphragm. The speaker device includes a vibrating body (VB), a driving part (magnetic circuit) driving the VB, and a frame supporting the VB and the driving part (magnetic circuit). The VB includes a voice coil (VC), a VC supporting part supporting the VC, a diaphragm group, and a driving member whose inner circumference portion is supported by the VC supporting part and which transmits VC vibration to the diaphragm group. The driving member includes a supporting part supporting the diaphragm group. A first connecting part is provided between the diaphragm group and the driving member and on the inner side with respect to the supporting part. The diaphragm group is connected to the driving member via the first connecting part.

Abstract: A loudspeaker includes a diaphragm and an edge having an inner periphery end portion thereof connected with an outer periphery of the diaphragm, in which an outer end portion of the edge is attached to a speaker frame. The diaphragm has a bent portion in the vicinity of a border at the inner periphery side of a connecting portion connecting the diaphragm with the edge. A reinforcing portion is formed on the bent portion in order to reinforce the bent portion. It is, therefore, possible to disperse or reduce various forces applied to the bent portion, and to prevent strength deterioration or damage of the diaphragm even when sound signals having large amplitude are applied to the loudspeaker. As a result, it is also possible to prevent deterioration of acoustic characteristics.

Abstract: A connecting member for speaker purpose, which is prevented from peeling easily from both a voice coil support and a vibrating body, and a speaker having the connecting member are provided. The speaker 1 includes a frame 4 and a vibrating unit 3. The vibrating unit 3 includes a drive cone 14 vibrated by a magnetic circuit unit 2, and a connecting member for speaker purpose 19. The connecting member for speaker purpose 19 connects the drive cone 14 and a voice coil bobbin 13 supporting a voice coil 12. The connecting member for speaker purpose 19 includes a member main body 40 formed into a ring shape and mounted at an outer surface of the voice coil bobbin 13; and a U-shape groove 41 arranged at the member main body 40 and receiving an insert cylinder portion 33 arranged at an inner edge of the drive cone 14.

Abstract: It is an object of the present invention to improve a speaker edge member manufacturing method in which a substrate is introduced into an edge member molding material by virtue of insertion molding, to prevent a trouble such as a crack on a parting line or the like, thus shortening a manufacturing time and thus reducing a manufacturing cost. The method comprises the steps of: attaching the substrate into the edge member molding die; introducing the edge member formation material into the edge member molding die before or after attaching the substrate into the edge member molding die; heating/pressurizing the substrate and the edge member formation material in the edge member molding die so as to obtain a molded edge member. At this time, the outer edge portion of the substrate is located in a position separated a predetermined distance from the dividing line of the die.

Abstract: A speaker having improved sound quality by reducing a phase difference and also having an outstanding outward appearance is provided. In a speaker comprising a vibrating element 10, a drive unit 20 for vibrating the vibrating element 10, and a frame 30 supporting the vibrating element 10 and the drive unit 20, the vibrating element 10 comprises a front face region 10A which forms a continuously curved face having a convex-shaped cross-sectional portion T1 formed in its central portion and a concave-shaped cross-sectional portion T2 formed around the portion T1, and a connecting region 10B located on the rear side of the front face region 10A and connected to the drive unit 20.

Abstract: A speaker apparatus including: a first diaphragm; a second diaphragm arranged coaxial with the first diaphragm along a driving direction; a frame having diaphragm supporting portions; and a voice-coil bobbin, wherein outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively, inner circumferential portions of the first diaphragm and the second diaphragm are connected together and fixed to the voice-coil bobbin so as to make a sealed space between the first diaphragm, the second diaphragm and the frame, and the voice-coil bobbin is supported by springiness of a gas contained in the sealed space.

Abstract: A voice coil bobbin coupled to a damper is allowed to vibrate in its axis direction within a magnetic circuit including a magnet and a plate supported by a yoke. A range extending between a neutral position of an end of the voice coil bobbin and a portion of the yoke opposing the end of the voice coil bobbin is longer than a range extending between the plate and a neutral position of a portion where the voice coil bobbin is coupled to the damper. A damper ring is fitted around the voice coil bobbin in a position closer to the plate within the portion where the voice coil bobbin is coupled to the damper. A rear face of the damper ring opposing the plate is shaped in face-geometry parallel to a face of the plate opposing the damper ring.

Abstract: It is an object of the present invention to improve a speaker edge member manufacturing process in which a substrate is introduced into an edge member molding material by virtue of insertion molding, to prevent a trouble such as a crack on a parting line or the like, thus shortening a manufacturing time and thus reducing a manufacturing cost. An edge member molding die has at least a male die and a female die, as well as an annular cavity formed corresponding to the speaker edge member within the die when the die is closed, while a dividing line is formed by virtue of the dividing surfaces of the male die and the female die, along a circumferential direction in a generally central portion of the annular cavity.

Abstract: A loudspeaker includes a diaphragm and an edge having an inner periphery end portion thereof connected with an outer periphery of the diaphragm, in which an outer end portion of the edge is attached to a speaker frame. The diaphragm has a bent portion in the vicinity of a border at the inner periphery side of a connecting portion connecting the diaphragm with the edge. A reinforcing portion is formed on the bent portion in order to reinforce the bent portion. It is, therefore, possible to disperse or reduce various forces applied to the bent portion, and to prevent strength deterioration or damage of the diaphragm even when sound signals having large amplitude are applied to the loudspeaker. As a result, it is also possible to prevent deterioration of acoustic characteristics.

Abstract: A speaker device includes a vibration system having a voice coil bobbin, a diaphragm and a cap, and a magnetic circuit system. The diaphragm has a first fixing portion, a main cone portion, a second fixing portion, a drive cone portion and an opening. The first fixing portion is provided at the outer peripheral edge portion of the diaphragm to be fixed to an edge. The main cone portion formed into a parabolic shape is provided between the first fixing portion and the second fixing portion, i.e., in the vicinity of an outer peripheral portion of the drive cone portion. The second fixing portion is provided on a substantial border portion between the main cone portion and the drive cone portion, and the outer peripheral edge portion of the cap is mounted thereon. The drive cone portion formed into a curve or straight shape is provided between the second fixing portion and the opening. An inner peripheral edge portion of the drive cone portion is mounted onto an outer peripheral wall of the voice coil bobbin.

Abstract: A speaker apparatus including: a first diaphragm; a second diaphragm arranged coaxial with the first diaphragm along a driving direction; a frame having diaphragm supporting portions; and a voice-coil bobbin, wherein outer circumferential portions of the first diaphragm and the second diaphragm are fixed to the diaphragm supporting portions respectively, inner circumferential portions of the first diaphragm and the second diaphragm are connected together and fixed to the voice-coil bobbin so as to make a sealed space between the first diaphragm, the second diaphragm and the frame, and the voice-coil bobbin is supported by springiness of a gas contained in the sealed space.

Abstract: A voice coil bobbin coupled to a damper is allowed to vibrate in its axis direction within a magnetic circuit including a magnet and a plate supported by a yoke. A range extending between a neutral position of an end of the voice coil bobbin and a portion of the yoke opposing the end of the voice coil bobbin is longer than a range extending between the plate and a neutral position of a portion where the voice coil bobbin is coupled to the damper. A damper ring is fitted around the voice coil bobbin in a position closer to the plate within the portion where the voice coil bobbin is coupled to the damper. A rear face of the damper ring opposing the plate is shaped in face-geometry parallel to a face of the plate opposing the damper ring.