An airtight tensionally stiff speaker diaphragm (i.e. being non-stretch, having a relatively high Young's modulus) which relies on tensile stiffness and air pressure to maintain its shape and produce sound can be extremely lightweight, a lighter spider is also described.

A loudspeaker having: a magnetic unit, a voice coil axially movable in the air gap of the magnetic unit, a basket fixed to the magnetic unit, a membrane fixed to the cylindrical support of the voice coil and connected to the basket, and a vibrating element fixed to said membrane by means of a rim. The vibrating element has a base fixed to the membrane, a shank that projects from the base and a mass that projects from the shank in cantilever mode.

The invention discloses a screen sounding device including a frame, a screen, and a driving device. The driving device has a magnetic circuit system fixed on screen, an electromagnet driving the magnetic circuit system to vibrate and fixed on the frame and an elastic connector connecting magnetic circuit system and electromagnet. The magnetic circuit system includes a magnet arranged around the electromagnet and a magnetic frame fixing the magnet. The magnetic frame includes a top wall fixed to the screen, a bottom wall arranged opposite to top wall and a side wall connecting the top wall and the bottom wall. The magnet is fixed on a side surface of the side wall facing the electromagnet. Applying the technical solution can meet low energy consumption and provide adequate stronger driving force.

The present disclosure provides a speaker which includes a frame, and a vibration system and a magnetic circuit system that are accommodated in the frame, where the magnetic circuit system is configured to drive the vibration system to vibrate and produce sound. The vibration system includes a diaphragm for vibrating and producing sound and a voice coil for driving the diaphragm to vibrate, and the magnetic circuit system includes a yoke fixedly connected to one end of the frame away from the diaphragm and a magnet assembled on the yoke. The vibration system further includes an iron core for driving the diaphragm to vibrate, and the voice coil is wound around the iron core. Compared with a related technology, the speaker provided in the present disclosure has a better acoustic effect.

The present disclosure discloses a diaphragm for radiating sound, includes: a dome part and a suspension part surrounding the dome part. The suspension part includes a first subgroup, a second subgroup, and a third subgroup arranged in a sequence, the first subgroup being close to the dome part, the third subgroup away from the dome part, and the second subgroup between the first and third subgroups. Each of the first, second, and third subgroups includes a number of patterns arranged along a circumference direction of the dome part. Selected patterns in the second subgroup are opposite to corresponding patterns in the first subgroup, and selected patterns in the second subgroup are opposite to corresponding patterns in the third subgroup; and each corner of the suspension part is provided with the first subgroup, the second subgroup and the third subgroup.

A loudspeaker device comprises first and second diaphragms (12, 14) arranged co-axially in an opposed relation to each other to cancel mechanical vibrations. Each diaphragm has multiple voice coils, with the voice coils of the first and second diaphragms (12, 14) arranged in the same plane to reduce the height of the loudspeaker device.

A speaker with a hidden folding ring includes a basin frame, a magnetic circuit system mounted on the basin frame, a voice coil disposed in a magnetic gap of the magnetic circuit system and a diaphragm. The diaphragm is of a concave structure, and an outer edge end of the diaphragm is connected to an inner bracket of the basin frame through a folding ring. The folding ring is located below the diaphragm, so that a cavity formed between the folding ring and the basin frame. An inner peripheral end of the diaphragm engaged to the voice coil. The present invention effectively increases the radiation area of the diaphragm, and obtains a higher SPL than the existing speaker of the same size, thereby improving the acoustic performance of the speaker.

According to an embodiment, an optical MEMS transducer includes a diffraction structure including alternating first reflective elements and openings arranged in a first plane, a reflection structure including second reflective elements and configured to deflect with respect to the diffraction structure, and an optical element configured to direct a first optical signal at the diffraction structure and the reflection structure and to receive a second optical signal from the diffraction structure and the reflection structure. The second reflective elements are arranged in the first plane when the reflection structure is at rest. Other embodiments include corresponding systems and apparatus, each configured to perform various embodiment methods.

A vibration membrane is disclosed. The vibration membrane includes a central dome part and a suspension part surrounding the dome part. The suspension part includes a pair of long-axis parts parallel to a long axis of the vibration membrane, a pair of short-axis parts parallel to a short axis of the vibration membrane, and a number of corner parts connecting the long-axis parts with the short-axis parts. The suspension part further includes first reinforcing parts located on the corner parts and second reinforcing parts located on the long-axis parts. Each of the second reinforcing part has a first master extension part and a first slave extension part crossing with the first master extension part. By virtue of the configuration, the strength of the vibration membrane is improved.

A diaphragm assembly for a miniature acoustical transducer having a sufficiently light paddle to allow good audio performance and a sufficiently stiff frame to allow handling. The paddle may be made of a thin sheet of aluminium and the frame of thicker aluminium or a bent sheet of aluminium.