Abstract: A back plate configured to press a mask assembly. The mask assembly includes a glass substrate and a mask that are stacked on the glass substrate. The back plate covers a surface of the glass substrate to press the glass substrate, thereby attaching the glass substrate to the mask. The back plate includes a bottom plate and multiple protrusions, the multiple protrusions include multiple bottom plate protrusions disposed on a side of the bottom plate facing the glass substrate. The multiple bottom plate protrusions are arranged in an array. Orthographic projections of the bottom plate protrusions on a plane of the mask fall within the mask. A distance between the projections of the bottom plate protrusions disposed adjacent to an edge of the mask and the edge of the mask is greater than or equal to a preset distance.

Abstract: A mini high-power magnetic latching relay comprising a base seat, an insulation sleeve, a push rod, a magnetic circuit, and a contact part. The magnetic circuit comprises a magnetic enclosure, an iron core, a yoke, and a winding; the winding comprising a coil former and a coil wrapped on the coil former. One end of the yoke is a U-shaped end; the iron core penetrates through the coil for forming a fixed connection with the other end of the yoke; and one end of the iron core is located at the center of the U-shaped end to form an E-shaped gap. The magnetic enclosure is formed by magnetic steel and armature vertically located on both ends of the magnetic steel.

Abstract: The utility model discloses a mini high-power magnetic latching relay, comprising a magnetic circuit, a contact part and a thrust disk; the magnetic circuit comprises a coil former, a coil, a magnetic enclosure, an iron core and a yoke; the magnetic enclosure comprises an alnico and an armature, characterized in that the coil former comprises a hollowed cylindrical shaft, a 1st mounting base and a 2nd mounting base; the 1st and 2nd mounting bases are horizontally arranged and integrated on the end of the cylindrical shaft; the magnetic enclosure is mounted on the thrust disk as installed on the 1st mounting base for coordinated sliding; whereas the contact part is mounted inside the 2nd mounting base for connection with the thrust disk; the utility model is characterized in that the magnetic enclosure and the contact part are on the same end of the coil former, which can reserve more expansion space for the coil, and thus improve loading capacity of the magnetic latching relay.

Abstract: A mini high-power magnetic latching relay containing a magnetic circuit is compact in structure, which can minimize the overall volume of the relay to facilitate application to the printed circuit board requiring high power and small volume of relay, and expansion of the application scope of magnetic latching relay is provided by this invention. The magnetic circuit comprises a magnetic enclosure, an iron core, a winding; the winding comprises a coil former and a coil wrapped on the coil former. The magnetic enclosure is formed by a magnetic steel and armature vertically located on both ends of the magnetic steel. This structure provides a balanced magnetic circuit that can ensure contact pressure in the magnetic latching relay, stable bouncing time, and improved service life.