这是胸针卡扣,看看这个视频
https://m.baidu.com/video/page?pd=video_page&nid=518331393556804176&sign=17289899686543889277&word=%E8%83%B8%E9%92%88%E5%8D%A1%E6%89%A3%E6%80%8E%E4%B9%88%E6%89%93%E5%BC%80%E8%A7%86%E9%A2%91&oword=%E8%83%B8%E9%92%88%E5%8D%A1%E6%89%A3%E6%80%8E%E4%B9%88%E6%89%93%E5%BC%80%E8%A7%86%E9%A2%91&atn=index&frsrcid=48304&ext=%7B%22jsy%22%3A1%7D&top=%7B%22sfhs%22%3A1%2C%22_hold%22%3A2%7D&sl=4&fr0=A&fr1=A&ms=1&lid=10871831863861188512&referlid=10871831863861188512&frorder=1&_t=1668783873053