Abstract: The present disclosure relates to a C-arm-based device. The C-arm-based device may include a C-arm component and a connection component. The C-arm component may include a first arm section and a second arm section. The connection component may include a first guiding section and a second guiding section separately disposed on a base. The first arm section is movably connected to the first guiding section. The second arm section is movably connected to the second guiding section.

Abstract: The utility model belongs to the field of audio transmission, and in particular to a vibrating reed type ultra-thin full-frequency bone conduction speaker. For problems that the existing speaker cannot make a sound via contact with a bone of a human body and then amplify the sound and change a frequency via stacking of an audio frequency in use, and the existing bone conduction speaker is slightly thicker under an equivalent effect, the following solution is provided. The vibrating reed type ultra-thin full-frequency bone conduction speaker includes a magnet portion; the magnet portion includes a U-shaped iron, a magnet and a washer; the magnet is attached to a lower surface of the U-shaped iron; the washer is attached to a lower surface of the magnet; both the magnet and the washer are located at a bottom of the U-shaped iron; and a long-arm vibrating reed and a tone tuning assembly are disposed under the magnet portion.