Abstract: The light-emitting device includes a substrate, a light-emitting chip unit formed on the substrate and including multiple chips, an isolation groove extending in a first direction and separating two adjacent ones of the chips, and a bridging structure. The isolation groove is defined by a bottom and two sidewalls and has a first groove section and a second groove section arranged in the first direction. The first groove section has a width in a width direction perpendicular to the first direction that is greater than a width of the second groove section in the width direction. At the first groove section, one of the sidewalls has a curved portion. The bridging structure is formed on the bottom and the sidewalls, covers the curved portion, and electrically connects the two adjacent ones of the chips.

Abstract: Disclosed are a refrigerator and a door assembly therefor; the door assembly includes two oppositely arranged doors and a turnover beam assembly, wherein the turnover beam assembly includes: a turnover beam body; a guide part extending out of one end of the turnover beam body and configured to be fitted with a retainer provided on a cabinet of the refrigerator; a locking part telescopically provided in the turnover beam body and having a first end fixedly connected with the guide part and a second end having a locking portion, the locking part having an unlocking state and a locking state. In the present invention, an anti-turnover function of the turnover beam body is achieved using the locking part and the elastic part, which improves coordination among all components, makes an internal structure of the turnover beam assembly more reasonable, achieves high practicability, and realizes easy popularization.

Abstract: Provided are an overhead line detection method and system based on a cable inspection robot. The cable inspection robot is suspended on the overhead line. An imaging unit and a laser emission unit are disposed at the front end of the cable inspection robot. The imaging unit is at a first angle to the overhead line. The laser emission unit is at a second angle to the overhead line.

Abstract: Disclosed is a coaxial speaker, including a magnetic circuit system, and two sounding units respectively arranged on the upper and lower sides of the magnetic circuit system. The magnetic circuit system includes a bottom plate, a first magnetic unit including a first magnet and a first yoke, and a second magnetic unit including a second magnet, a second yoke, a third magnet, and a fourth magnet. The second yoke includes an annular plate sandwiched between the second and third magnets, and a hollow protrusion extending to a first through hole of the bottom plate. The third magnet covers a second through hole of the annular plate. The fourth magnet is fixed to the third magnet and contained inside the hollow protrusion. The coaxial speaker is simple and compact in structure, reduces the cost, and can also be used as a receiver with a reverse phase silencer.

Abstract: The present invention provides a circuit, which includes a first sound signal input end, a second sound signal input end, a power amplifier, a capacitor, a low frequency sounding module and a high frequency sounding module. The present invention also provides a sounding device applying the circuit provided by the present invention. Compared with the related art, the present invention provides a sounding device with simplified structure and wide application.

Abstract: Disclosed is a coaxial speaker, including a magnetic circuit system, and two sounding units respectively arranged on the upper and lower sides of the magnetic circuit system. The magnetic circuit system includes a bottom plate, a first magnetic unit including a first magnet and a first yoke, and a second magnetic unit including a second magnet, a second yoke, and a third magnet. The second yoke includes an annular plate sandwiched between the second and third magnets, and an extension wall extending to a first through hole of the bottom plate. The third magnet covers a second through hole of the annular plate. The coaxial speaker is simple and compact in structure, reduces the cost, and can also be used as a receiver with a reverse phase silencer.

Abstract: The present invention provides a coaxial speaker including a frame, a magnetic circuit system, a first vibration system, a second vibration system around the first vibration system, a first circuit board, an inserting member, and a first terminal. The first vibration system locates coaxially with the second vibration system. The first vibration system includes a first diaphragm and a first voice coil. The magnetic circuit system includes a first magnetic gap and a second magnetic gap. The first circuit board is a flat shape and electrically connected to the first voice coil. The first circuit board abuts against a surface of the first voice coil away from the first diaphragm. The arrangement of the first circuit board can increase the amplitude of the first voice coil, and the coaxial speaker can also realize the function of a receiver.

Abstract: The present disclosure provides a sounding device having a first frame; a first vibration system including a first diaphragm and a first voice coil; and a magnetic circuit system with a first magnetic gap and a second magnetic gap. The sounding device further includes a second vibration system having a second diaphragm and a second voice coil, and a conductive insertion member. The total bending length of both ends of the voice coil wire can be controlled by adjusting the winding process of the second voice coil, so that the purpose of adjusting the amplitude of the second vibration system is achieved for facilitating the adjustment of the amplitude of the second vibration system.

Abstract: Disclosed is a coaxial speaker, including a magnetic circuit system, a first sounding unit, a second sounding unit around the first sounding unit, a flexible printed circuit board electrically connected to the first sounding unit, an insert inserted in the magnetic circuit system for supporting the flexible printed circuit board, and a conductive terminal embedded in the insert for electrically connecting the flexible printed circuit board to an external circuit. The flexible printed circuit board has a first fixing part connected to the insert, a second fixing part connected to the first sounding unit, and a resilient arm connected between the two fixing parts and including two arms respectively extending in two different directions. The coaxial speaker has a high sound quality and a receiver function.

Abstract: The present invention provides an electronic device with a function of sound including a housing assembly and a coaxial speaker. The coaxial speaker includes a frame, a magnetic circuit system, a first and a second vibration system. The first vibration system includes a first diaphragm and a first voice coil, the second vibration system includes a second diaphragm and a second voice coil. The first diaphragm generates treble sound. The second diaphragm generates bass sound. The electronic device further includes a sound guiding channel including a first channel leading out the treble sound and a second channel communicating with the first channel. The second channel combines the treble sound from the first channel with the bass sound generated by the second diaphragm and outputs them to the outside of the housing assembly. The electronic device with a function of sound of the present enhances the effect of the treble sound.

Abstract: The present invention provides a coaxial speaker including a supporting ring, a magnetic circuit system, a first vibration system, and a second vibration system. The second vibration system locates coaxially with the first vibration system. The first vibration system includes a first diaphragm and a first voice coil. The second vibration system includes a second diaphragm and a second voice coil. The first diaphragm is used for generating treble sound, the second diaphragm is used for generating bass sound. The supporting ring includes a first end portion, a second end portion, and a connecting portion. A projection of the first diaphragm is partially overlapped with a projection of the second diaphragm along a vibrating direction of the coaxial speaker. The treble diaphragm design uses a Z-axis direction vibration space of the bass diaphragm to increase the vibration area to improve the performance.

Abstract: The present invention provides a sounding device. The sounding device includes a frame, a first vibration system having a first diaphragm and a first voice coil, a second vibration system, a magnetic circuit system with a first magnetic gap and a second magnetic gap, and an inner sounding cavity, a support ring, and an insertion member. Airflow generated by the vibration of the first diaphragm pushes the second diaphragm through the support ring. Compared with the related art, the sounding device of the present invention is convenient to improve the low frequency performance and has a better user experience effect.

Abstract: The present invention provides a coaxial speaker including a frame, a magnetic circuit system, a first vibration system, and a second vibration system. The second vibration system locates coaxially with the first vibration system. The first vibration system includes a first diaphragm and a first voice coil, the second vibration system includes a second diaphragm and a second voice coil. The magnetic circuit system includes a magnetic guiding plate, a first magnet, a second magnet forming a first magnetic gap with the first magnet, a third magnet, and a forth magnet. The forth magnet, the magnetic guiding plate, and the second magnet stack in sequence and form a second magnetic gap with the third magnet. The coaxial speaker has a common magnetic circuit system for sounding on the front and back sides, which can not only form a full-range speaker, but also can function as a receiver.

Abstract: The present invention provides a coaxial speaker including a support ring, a magnetic circuit system, a first vibration system and a second vibration system fixed on both side of the support ring and arranged coaxially. The first vibration system includes a first diaphragm and a first voice coil. The second vibration system includes a second diaphragm and a second voice coil. The magnetic circuit system includes a first magnetic gap and a second magnetic gap. The first diaphragm is used for generating treble sound, the second diaphragm is used for generating bass sound. The second vibration system includes a support voice coil sandwiched between the second diaphragm and second voice coil. Bass sound and treble sound of the coaxial speaker form a full-range speaker, providing high-quality sound. The support voice coil can flexibly adjust the height and the position of the second voice coil according to requirements.

Abstract: Disclosed is an electronic device with a sounding function, including a shell structural member and a speaker. The speaker includes a first sounding unit used to emit low-frequency sounds and a second sounding unit used to emit high-frequency sounds that are coaxially arranged. The first sounding unit surrounds the second sounding unit. The shell structural member is provided with a first channel for transmitting the low-frequency sounds, a second channel separated from the first channel for transmitting the high-frequency sounds, and a common channel for communicating both the first and second channels with the outside of the electronic device. The second channel includes a front cavity of the second sounding unit and a connecting channel for communicating the front cavity with the common channel. The connecting channel is in a horn shape. The effect of the high-frequency sounds of the electronic device with a sounding function is improved.

Abstract: The present invention discloses a refrigerator door with a replaceable door surface, including: a foamed door body and a door shell plate; wherein a rear side of the door shell plate is provided with a hook; a front side of the foamed door body is provided with a press lock catch, which comprises a snap tab; and when the door shell plate is assembled on the front side of the foamed door body, the hook is snapped into the snap tab to limit the displacement of the door shell plate in a front-rear direction. In the present invention, the locking or unlocking between the hook and the snap tab is achieved by rotating the snap tab, which is rotatable in the press lock catch, between the first position and the second position, such that the door shell plate and the foamed door body are more convenient to assemble and disassemble.

Abstract: The present invention discloses a refrigerator door with a replaceable door surface, including: a foamed door body and a decorative door plate; wherein a rear side of the decorative door plate is provided with a mating member; a front side of the foamed door body is provided with a magnetic lock catch, which comprises a plurality of balls; By clamping the mating member on the rear side of the decorative door plate by the plurality of balls of the magnetic lock catch in the foamed door body, the displacement of the decorative door plate in the front-rear direction is limited. In addition, the unlocking magnetic buckle is provided to repel with the magnetic ring, such that a locking relationship between the plurality of balls and the mating member is released, thereby achieving the effect of quickly disassembling and installing the decorative door plate.

Abstract: The present invention provides a refrigerator door with a replaceable door panel, comprising: a door body and a decorative door panel detachably connected to the door body; a rotary latch and a limiting member are disposed on the door body; a rear side of the decorative door panel facing towards the door body comprises a second limiting member and a lock post wherein when the decorative door panel is assembled on a front side of the door body, the rotary latch and the lock post snap-fit each other to limit a displacement of the decorative door panel in an up-down direction; the first limiting member cooperates with the second limiting member to limit a displacement of the decorative door panel in a front-rear direction.

Abstract: The present invention provides a refrigerator door body, provided with a door liner and a storage device mounted on the door liner; a hanging lug and a fitting groove which fit each other are provided between the door liner and the storage device, a power supply module is provided, in a fitting manner, between the hanging lug and the fitting groove, the power supply module comprises a first connector provided on the hanging lug and a second connector provided at the fitting groove, and the first connector and the second connector are connected to each other in a fitting manner when the storage device is mounted. The refrigerator door body of the present invention not only can function to support the storage device, but also can function to supply power to the storage device.

Abstract: Methods and systems of producing perovskite material, in which the nucleation and crystallization processes are decoupled and, hence, independently controlled resulting in highly uniform nucleation sites for subsequent crystallization of perovskites. Methods and systems for using perovskite material and mixed perovskite films for solar cells.