Abstract: The present application discloses a method for calibrating a parameter error of an electron probe microanalysis instrument. A one-dimensional grating standard template is prepared based on atom lithography technology. A theoretical grating period D of the one-dimensional grating standard template is calculated. The one-dimensional grating standard template is statically placed on a stage of the electron probe microanalysis instrument. The electron probe microanalysis instrument scans the one-dimensional grating standard template on the stage, performs image acquisition and measurement on a grid distance of the one-dimensional grating standard template to obtain a grating scanning distance measurement value L, and records a magnification ratio at this time. A calibration factor K under the magnification ratio is calculated according to D and L.

Abstract: The present disclosure provides a speaker, comprising a basin frame with a receiving space, a vibration system disposed at the basin frame, and a magnetic circuit system configured for driving the vibration system to generate sounds by vibration, the vibration system comprises a diaphragm with an outer edge fixedly held by the basin frame and a voice coil configured for driving the diaphragm to vibrate, the voice coil includes a first voice and a second voice coil fixedly connected to the first voice coil, the first and second voice coils are disposed in parallel and symmetrically, the first and second voice coils are integrally wound molded and the winding direction of the first voice coil is opposite to that of the second voice coil. The speaker provided by the present disclosure could improve utilization of magnetic field, provide better vibration effect and reduce resonance frequency.

Abstract: The invention provides a loudspeaker, including: a frame; a vibration structure supported by the frame; a magnetic circuit structure carried by the frame; and a back cavity formed cooperatively by the frame, the vibration structure and the magnetic circuit structure. A number of leakage holes is formed in the frame for communicating the back cavity and outside of the loudspeaker. The loudspeaker further includes a number of corresponding filling pieces received in the leakage holes and made of sound adsorption material.

Abstract: A speaker is provided. The speaker includes a holder defined by sidewalls, a vibration unit fixed to the holder, a magnetic circuit system fixed to the holder, at least one leak hole each penetrating through one of the sidewalls, at least one metal sheet each joined to one of the sidewalls through injection-molding, and at least one damping layer. The at least one metal sheet is provided with at least one through hole in a one-to one correspondence with the at least one leakage hole. The at least one damping layer is fixed to one of the at least one metal sheet by laser spot welding and completely covers the at least one through hole and the at least one leak hole.

Abstract: A speaker includes a vibration structure, a magnetic circuit structure, and a housing having a cavity receiving the vibration structure and the magnetic circuit, the vibration structure comprises: a diaphragm fixed to the housing and a voice coil driving the diaphragm to vibrate and sound, the diaphragm comprises a dome located at an intermediate position and a suspension connected to the dome, the suspension comprises a first fixing portion fixed to the housing, a second fixing portion connected to the dome, and a wrinkle portion that connects the first fixing portion with the second fixing portion, the dome is fixed at a side of the second fixing portion facing towards the voice coil, and comprises an edge portion connected to the voice coil, and the edge portion comprises a recessed portion formed by recessing from a surface connected to the voice coil along a direction away from the voice coil.

Abstract: The present disclosure provides a speaker, including a frame, a magnetic circuit system and a vibration system accommodated in the frame; the frame includes a main body defining an accommodating space and a mounting portion extending from the main body toward the vibrating diaphragm; the vibrating diaphragm is fixed at the mounting portion; the main body and the mounting portion are integrally formed through double-shot molding by using two kinds of plastics, where the main body is made of PPA, and the mounting portion is made of LCP. According to the speaker provided in the present disclosure, a glued surface between the vibrating diaphragm and the mounting portion has good flatness, which helps to improve waterproof performance and performance yield of the speaker, and firmness of gluing the magnetic circuit system with the main body is high, which helps to improve reliability of the product when the product falls.

Abstract: The present disclosure provides a speaker, comprising a basin frame with a receiving space, a vibration system disposed at the basin frame, and a magnetic circuit system configured for driving the vibration system to vibrate and thus generate sound, wherein, the vibration system comprises a sound radiation plate, a flexible circuit board for elastically supporting the sound radiation plate and a voice coil disposed at a lower side of the flexible circuit board, the flexible circuit board comprises coating layers laminated apart and a copper layer sandwiched between two adjacent coating layers, the coating layers are poly ether ether ketone layers and/or a thermoplastic polyurethane elastomer layers. The speaker provided by the present disclosure has a vibration system with a smaller mass, a higher sensitivity and a reduced cost.

Abstract: The present disclosure provides a speaker, comprising a basin frame with a receiving space, a vibration system disposed at the basin frame, and a magnetic circuit system configured for driving the vibration system to generate sounds by vibration, the vibration system comprises a diaphragm with an outer edge fixedly held by the basin frame and a voice coil configured for driving the diaphragm to vibrate, the voice coil includes a first voice and a second voice coil fixedly connected to the first voice coil, the first and second voice coils are disposed in parallel and symmetrically, the first and second voice coils are integrally wound molded and the winding direction of the first voice coil is opposite to that of the second voice coil. The speaker provided by the present disclosure could improve utilization of magnetic field, provide better vibration effect and reduce resonance frequency.

Abstract: The present disclosure provides a speaker, including a frame, a magnetic circuit system and a vibration system accommodated in the frame; the frame includes a main body defining an accommodating space and a mounting portion extending from the main body toward the vibrating diaphragm; the vibrating diaphragm is fixed at the mounting portion; the main body and the mounting portion are integrally formed through double-shot molding by using two kinds of plastics, where the main body is made of PPA, and the mounting portion is made of LCP. According to the speaker provided in the present disclosure, a glued surface between the vibrating diaphragm and the mounting portion has good flatness, which helps to improve waterproof performance and performance yield of the speaker, and firmness of gluing the magnetic circuit system with the main body is high, which helps to improve reliability of the product when the product falls.