Abstract: A roller board display device includes a base having two lugs on a side thereof and two stubs extend from bottom of said base so that the display devices can be connected in series by inserting the stubs in the holes of lugs. A rest board is connected to said top surface of said base and a recess is defined in said rest board. One of the roller frame is engaged with the notch in the rest board and an end of the roller board is engaged with two recesses defined in a top surface of the base. A side of the roller board may also be engaged with the two recesses and the other side of the roller board is rested on the rest board.

Abstract: A roller board display device includes a base having two lugs on a side thereof and two stubs extend from bottom of said base so that the display devices can be connected in series by inserting the stubs in the holes of lugs. A rest board is connected to said top surface of said base and a recess is defined in said rest board. One of the roller frame is engaged with the notch in the rest board and an end of the roller board is engaged with two recesses defined in a top surface of the base. A side of the roller board may also be engaged with the two recesses and the other side of the roller board is rested on the rest board.

Abstract: A buckle device for skate boots includes a U-shaped lock member pivotably connected to a frame on the boot and a head of a toothed belt is pivotably connected to the lock member. A slot is defined in a distal end of the lock member and two recesses defined in a bottom of the lock member. A tongue is retractably received in the slot of the lock member with two resilient legs biased between the tongue and an inside of the recess. The tongue has two limiting pieces movably retained in the two recesses in the lock member and an engaging member extends from a bottom of the tongue so as to be engaged with the hook. The lock member cannot be lifted except that the engaging member is disengaged from the hook by pushing the tongue.