pushpin
noun [ C ] US uk/ˈpʊʃ.pɪn/ us/ˈpʊʃ.pɪn/
（尤指用来固定布告、图画等的）图钉
a small pin with a small ball-shaped piece of plastic on one end, used especially for putting notices, pictures, etc. on a board or a wall
Compare: drawing pin thumbtack
See also: pin noun (PIECE OF METAL)