Universal bed sheet retaining device

A universal bed sheet retaining device, comprising a force-bearing base plate, wherein the force-bearing base plate has a generally square configuration;

• two adjacent sides of a top surface of the force-bearing base plate are respectively provided with a contact support plate, a top end of each contact support plate is provided with an arc-shaped bent plate, and one end of the arc-shaped bent plate away from the contact support plate is fixedly connected to a fixed insertion plate;
• the device further comprises a positioning box configured to slidably engage with the fixed insertion plate, for securing a bed sheet between the fixed insertion plate and the positioning box;
• the positioning box comprises a back plate and connecting plates symmetrically provided on upper and lower sides of the back plate, one end of each connecting plate away from the back plate is provided with a limiting plate parallel to the back plate, one end of the back plate and the two connecting plates is provided with an insertion slot for allowing the positioning box to be slid onto the fixed insertion plate, another end of the back plate and the two connecting plates is provided with a stopping portion, which cooperates with the fixed insertion plate;
• the top surface of the force-bearing base plate is provided with an internal groove, and a top surface of the internal groove is provided with a plurality of sets of anti-slip lugs arranged at equal intervals.