Abstract: A pedestrian warning device, comprising a warning device body having a cavity and an open end portion, and a sound-generating device mounted inside the cavity, wherein the pedestrian warning device further comprises a grille cover arranged on the end portion of the warning device body; the grille cover comprises at least two grille layers spaced at intervals from the inside to the outside, each of the grille layers comprising a plurality of crossbeams, the crossbeams being arranged at intervals so as to form gaps to enable gas to flow between adjacent crossbeams, and wherein a width of the gaps is not greater than a width of the crossbeams, and the crossbeams of adjacent grille layers are interleaved with each other. The grille cover can protect internal component of the pedestrian warning device and will not affect the performance of the pedestrian warning device.

Abstract: The present disclosure relates to a pedestrian alert device for an electric vehicle, comprising an accelerator pedal mechanism, a controller, and a sound producing mechanism. The controller is electrically connected to the accelerator pedal mechanism and the sound producing mechanism respectively, and is disposed on the accelerator pedal mechanism. The accelerator pedal mechanism comprises an installation box, an installation base fixedly connected to the installation box, and an accelerator pedal disposed on the installation base, the installation box has a chamber, and the controller is disposed in the chamber of the installation box. The controller is electrically connected to the sound producing mechanism by a wire, and the installation box is provided with a through-hole for the wire to pass through. The pedestrian alert device for an electric vehicle has low cost and a compact structure.

Abstract: A pedestrian warning device, comprising a warning device body having a cavity and an open end portion, and a sound-generating device mounted inside the cavity, wherein the pedestrian warning device further comprises a grille cover arranged on the end portion of the warning device body; the grille cover comprises at least two grille layers spaced at intervals from the inside to the outside, each of the grille layers comprising a plurality of crossbeams, the crossbeams being arranged at intervals so as to form gaps to enable gas to flow between adjacent crossbeams, and wherein a width of the gaps is not greater than a width of the crossbeams, and the crossbeams of adjacent grille layers are interleaved with each other. The grille cover can protect internal component of the pedestrian warning device and will not affect the performance of the pedestrian warning device.

Abstract: The present disclosure relates to a coaxial speaker, which has better dust-proof and water-proof performance. The coaxial loudspeaker comprises a bass unit and a high-pitched unit coaxially arranged, the bass unit comprises a T-iron, a diaphragm and a voice coil connected to the diaphragm. The coaxial loudspeaker further comprises a cabin fixed on the T-iron, a lower portion of the cabin passes through the voice coil to connect with the T-iron, a top end portion of the cabin is located above the diaphragm, the high-pitched unit is arranged on the top end portion of the cabin, and the coaxial loudspeaker further comprises a dust-proof ring having an upper edge connected with the top end portion of the cabin and a lower edge connected with the upper portion of the voice coil.

Abstract: The present disclosure relates to a coaxial speaker, which has better dust-proof and water-proof performance. The coaxial loudspeaker comprises a bass unit and a high-pitched unit coaxially arranged, the bass unit comprises a T-iron, a diaphragm and a voice coil connected to the diaphragm. The coaxial loudspeaker further comprises a cabin fixed on the T-iron, a lower portion of the cabin passes through the voice coil to connect with the T-iron, a top end portion of the cabin is located above the diaphragm, the high-pitched unit is arranged on the top end portion of the cabin, and the coaxial loudspeaker further comprises a dust-proof ring having an upper edge connected with the top end portion of the cabin and a lower edge connected with the upper portion of the voice coil.