A sound production device includes a substrate having a cavity and a plurality of cantilever diaphragms fixed on the substrate. Each of the plurality of the cantilever diaphragms includes a fixed end fixed on the substrate and a free end extending from the fixed end to a position suspended above the cavity. The free end includes a first surface and a second surface oppositely arranged. The free end and the substrate or other free ends are spaced to form a gap. The sound production device further includes a first dielectric elastomer actuator, a second dielectric elastomer actuator, and a flexible connector. The sound production device of the present disclosures adopts dielectric elastomer actuators on both of the upper and lower sides of the cantilever diaphragms to together act on the cantilever diaphragms, thereby improving the linearity of the sound production device.

A sound production device includes a substrate having a cavity and a plurality of cantilever diaphragms fixed on the substrate. Each of the plurality of the cantilever diaphragms includes a fixed end fixed on the substrate and a free end extending from the fixed end to a position suspended above the cavity. The free end includes a first surface and a second surface oppositely arranged. The free end and the substrate or other free ends are spaced to form a gap. The sound production device further includes a first dielectric elastomer actuator, a second dielectric elastomer actuator, and a flexible connector. The sound production device of the present disclosures adopts dielectric elastomer actuators on both of the upper and lower sides of the cantilever diaphragms to together act on the cantilever diaphragms, thereby improving the linearity of the sound production device.

A MEMS speaker includes a substrate, a vibration sounding portion and a baffle plate with a through hole. The baffle plate, the substrate and the vibration sounding portion form a sounding inner cavity, and a volume of the sounding inner cavity can adjust a resonant frequency of the sounding inner cavity, so that the resonance frequency of the sounding inner cavity resonate with a preset frequency of the MEMS speaker. A speaker assembly structure further provided includes a speaker, a fixing portion, and a baffle plate, the speaker and the baffle plate together enclose and form a sounding inner cavity, the fixing portion and the speaker are fixedly connected together and form a sealing structure. A sound pressure level of the MEMS speaker and the speaker assembly structure is high and harmonic distortion of the MEMS speaker and the speaker assembly structure is small.

A speaker device is provided. The speaker device includes a frame, and a vibration unit, a magnetic circuit unit, and air-permeable isolation member. The magnetic circuit unit includes a yoke fixed to the frame. The yoke and the frame are spaced to form a leakage port to enable leaking from a side surface of the speaker device. The sound-producing inner cavity communicates with the leakage port. The air-permeable isolation member completely covers the leakage port. The leakage port communicates with the outside through the leakage hole. Compared with the related art, the speaker device of the present disclosure has a yoke leakage structure, which can realize self-sealing and is conducive to assembling.

A speaker device is provided. The speaker device includes a frame, and a vibration unit, a magnetic circuit unit, and air-permeable isolation member. The magnetic circuit unit includes a yoke fixed to the frame. The yoke and the frame are spaced to form a leakage port to enable leaking from a side surface of the speaker device. The sound-producing inner cavity communicates with the leakage port. The air-permeable isolation member completely covers the leakage port. The leakage port communicates with the outside through the leakage hole. Compared with the related art, the speaker device of the present disclosure has a yoke leakage structure, which can realize self-sealing and is conducive to assembling.

The present invention provides a speaker including: a frame, a vibration system and a magnetic circuit system. The vibration system includes a vibration diaphragm and a voice coil. The magnetic circuit system includes a magnetic part, and the voice coil is arranged around the magnetic part. The vibration system further includes an elastic plate with two branch elastic plates. The branch elastic plate includes a connection part, an extension part, an elastic arm and a fixed part. The surfaces of the connection part and the extension part facing the connection surface are recessed together to form a welding slot, and the lead wire is accommodated in the welding slot. The speaker provided by the present invention can not only effectively prevent the voice coil from swaying, but also reduce the number of parts to simplify the product structure.

The present invention provides a speaker including: a frame, a vibration system and a magnetic circuit system. The vibration system includes a vibration diaphragm and a voice coil. The magnetic circuit system includes a magnetic part, and the voice coil is arranged around the magnetic part. The vibration system further includes an elastic plate with two branch elastic plates. The branch elastic plate includes a connection part, an extension part, an elastic arm and a fixed part. The surfaces of the connection part and the extension part facing the connection surface are recessed together to form a welding slot, and the lead wire is accommodated in the welding slot. The speaker provided by the present invention can not only effectively prevent the voice coil from swaying, but also reduce the number of parts to simplify the product structure.

A speaker device is provided. The speaker device includes a frame, a vibration unit and a magnetic circuit unit. The vibration unit and the magnetic circuit unit are fixed to the frame. The magnetic circuit unit is configured to drive the vibration unit to vibrate to produce sound. The magnetic circuit unit includes a yoke. The yoke and the frame are spaced to form a leakage port. The vibration unit includes a diaphragm, a voice coil, and an elastic support assembly. The auxiliary diaphragm has one end fixed to the frame and the other end connected to the voice coil. The auxiliary diaphragm is provided with multiple vents spaced and penetrating the auxiliary diaphragm. The present disclosure can increase the circulation of gases above and below the auxiliary diaphragm, so that a side leakage effect of the speaker device is improved, thereby improving acoustic performance of the speaker device.

A speaker device is provided. The speaker device includes a frame, a vibration unit and a magnetic circuit unit. The vibration unit and the magnetic circuit unit are fixed to the frame. The magnetic circuit unit is configured to drive the vibration unit to vibrate to produce sound. The magnetic circuit unit includes a yoke. The yoke and the frame are spaced to form a leakage port. The vibration unit includes a diaphragm, a voice coil, and an elastic support assembly. The auxiliary diaphragm has one end fixed to the frame and the other end connected to the voice coil. The auxiliary diaphragm is provided with multiple vents spaced and penetrating the auxiliary diaphragm. The present disclosure can increase the circulation of gases above and below the auxiliary diaphragm, so that a side leakage effect of the speaker device is improved, thereby improving acoustic performance of the speaker device.

A display apparatus includes: a display panel configured to display an image; a housing module including a roller configured to have the display panel wound or unwound in the housing module; a rolling module including a structure connected to an upper portion of the display panel, and configured to wind or unwind the display panel according to a folding or unfolding of the structure; a plurality of beams on one surface of display panel that extends in a first direction, and arranged in a second direction vertical to the first direction; and a vibration generating device in a portion of each of the plurality of beams, wherein the vibration generating device includes a plurality of sound generating modules configured to vibrate the display panel when the display panel is unwound from the roller and the structure is unfolded.