Wireless safety belt reminding device

Provided is a technique for securing the straightness of an electromagnetic wave signal transmitted and received according to the fastening of a buckle. A wireless seatbelt alert device includes a tunnel member disposed parallel to a seat rail, and a channel is formed in the tunnel member. When the safety belt is fixed on the belt buckle, the sub transmitting and receiving unit transmits an electromagnetic wave signal in the longitudinal direction of the channel, and the main transmitting and receiving unit receives the electromagnetic wave signal transmitted by the sub transmitting and receiving unit in the channel so as to transmit the electromagnetic wave signal to the integrated controller. 提供一种确保根据带扣的紧固而发送和接收的电磁波信号的直度的技术。一种无线安全带提醒装置，包括平行于座椅导轨设置的隧道构件，并且在隧道构件中形成有通道。当安全带固定到带扣上时，子发送和接收单元在通道的纵向方向上发送电磁波信号，主发送和接收单元在通道内接收由子发送和接收单元发送的电磁波信号，以将电磁波信号传送到集成控制器。