A passive cooling device is disclosed for use with a speaker integrated electronic device. Also disclosed is a method of using the device for generating passive cooling and increasing the sound output by the speaker integrated electronic device when outputting low frequency sound. The electronic device has an internal housing in which the speaker is located with a diaphragm extending through a void in the housing wall. The internal housing also has an air flow channel in fluid communication with the housing interior and an outlet adjacent an electronic component. Movement of the diaphragm directs moving air through the channel to reduce the operating temperature of the electronic component during speaker activation, while air movement in the internal housing increase the sound output by the speaker integrated electronic device.

In at least one embodiment, a tactile transducer including a housing, a first voice coil and a magnetic assembly is provided. The first voice coil includes an electrically conductive wire being orientated in a first winding direction to generate a first magnetic field. The magnetic assembly is positioned within the housing. The magnetic assembly is configured to move within the housing to generate a tactile output and to repel against the first voice coil based on a polarity of the first magnetic field as the magnetic assembly moves toward the first voice coil to prevent contact of a first portion of the magnetic assembly with a first side of the housing.

A single-magnet double-tone-circuit coaxial loudspeaker includes a shell, a U iron, a magnet, a spring washer, a first diaphragm assembly, a second diaphragm assembly, an upper cover and a terminal plate. A single magnet+spring washer+U iron magnetic circuit is extended to be two upper-lower coaxial magnetic circuits, therefore, the first diaphragm assembly and the second diaphragm assembly which are electrically connected to the terminal plate generate a double-magnetic-circuit feature by sharing a single-magnet system. High frequency and low frequency wave bands are driven independently, such that high frequency and low frequency portions can achieve a better sound resolution effect. The complementation of the two reduces distortion, thus improves the overall acoustic performance of the loudspeaker.

In at least one embodiment, a tactile transducer including a housing, a first voice coil and a magnetic assembly is provided. The first voice coil includes an electrically conductive wire being orientated in a first winding direction to generate a first magnetic field. The magnetic assembly is positioned within the housing. The magnetic assembly is configured to move within the housing to generate a tactile output and to repel against the first voice coil based on a polarity of the first magnetic field as the magnetic assembly moves toward the first voice coil to prevent contact of a first portion of the magnetic assembly with a first side of the housing.

A linear actuator may include a movable element having a plurality of permanent magnets stacked in a direction of an axis line; a stationary element comprising a plurality of coils surrounding a circumferential section of the permanent magnets, the plurality of coils being placed along the axis line; and viscous elastic members inserted between the movable element and the stationary element. The plurality of permanent magnets are arranged such that, among adjacent permanent magnets of the plurality of permanent magnets, sides of the adjacent permanent magnets facing each other have a same polarity. The viscous elastic members are provided at a plurality of locations being separate in the direction of the axis line, in a space sandwiched in a radial direction by the movable element and the stationary element.

An electrodynamic transducer includes a rear frame defining an open frame interior, and a front frame enclosing the open frame interior and attached to the rear frame, the front frame including a center hub disposed about a central axis of the transducer. A movable diaphragm is positioned within the open frame interior and operably connected to the rear frame. A magnet assembly is disposed forward of the diaphragm and coupled to the center hub, the magnet assembly defining a magnetic air gap annularly disposed about the central axis. A voice coil is disposed in the magnetic air gap surrounding the magnet assembly and operably connected to the diaphragm. A first spider is coupled between the voice coil and the rear frame behind the diaphragm, and a second spider coupled between the diaphragm and the front frame and disposed forward of the diaphragm.

A multi-input-driving loudspeaker, including: a frame; a cone arranged on the frame; a main input-driving mechanism; and a plurality of secondary input-driving mechanisms; wherein the main input-driving mechanism is arranged between the plurality of secondary input-driving mechanisms; the main input-driving mechanism includes a main voice coil, a T-yoke, and a front panel and a first magnetic steel sleeved on the T-yoke, a main voice coil mounting hole is provided in the middle of the cone, an upper end portion of the main voice coil is connected to the main voice coil mounting hole; each of the secondary input-driving mechanisms includes a secondary voice coil and a secondary magnetic circuit assembly formed with a secondary magnetic gap, a plurality of secondary voice coil mounting holes are correspondingly provided on the cone, an upper end portion of each secondary voice coil is connected to a corresponding secondary voice coil mounting hole.

An electro-acoustic transducer has an acoustic diaphragm and a voice-coil. The diaphragm defines a first major surface. A flange extends from the diaphragm in a direction opposite the first major surface. The voice-coil has a first plurality of windings positioned adjacent to the acoustic diaphragm and a second plurality of windings positioned distally from the acoustic diaphragm. The flange overlaps the first plurality of windings. The flange and the windings can be adhesively bonded with each other to form a lap joint. The lap joint can transfer force from the voice-coil to the diaphragm.

[Problem] To provide a speaker that is capable of emitting higher-volume and clearer sounds which hard-of-hearing individuals and hearing individuals can hear together without inconvenience by not suppressing vibration of the curved diaphragm and therefore efficiently transmitting kinetic energy converted from the electric energy of a sound signal to a curved diaphragm, and also has a reduced weight and size and is easy to manufacture. [Solution] A speaker 10 of the present invention includes: a diaphragm 1 curved in one direction; a driver unit 2 that vibrates the diaphragm in accordance with an inputted electric signal; and a frame body 3 supporting the diaphragm and the driver unit. One end side and another side of the diaphragm in the direction of curvature are attached to the frame body via edge parts 15 that do not interfere with the vibration. Also, the driver unit is in contact with one surface of the diaphragm and fixedly attached to the frame body.

To make it possible to take countermeasures against noises of a loudspeaker by means of a simple configuration. A loudspeaker 10 includes: a bobbin 15 that is provided with a voice coil 31; a diaphragm 13 that is connected to the bobbin 15; a frame 11 that supports the diaphragm 13; and a magnetic circuit section 17 that includes a magnet 22. The loudspeaker 10 further includes: a first conductive body 41 that is connected to the voice coil 31 and is led out to the outside of a bobbin 15A; and a second conductive body 51 that is connected to the first conductive body 41 and penetrates the magnet 22.