Mounting device for a blind

A mounting device for a blind, comprising:

• a connecting rail extending along a lengthwise direction;
• two slide rails respectively and slidably connected with two ends of said connecting rail, each of said slide rails being slidable relative to said connecting rail along the lengthwise direction;
• two abutting plates, each interposed between a respective one of said slide rails and said connecting rail in an up-down direction that is transverse to the lengthwise direction, each of said abutting plates being moved with the respective one of said slide rails relative to said connecting rail along the lengthwise direction, and having a plate body and a screw hole formed in said plate body;
• two screw bolts, each threadedly engaged in said screw hole of a respective one of said abutting plates and having a lower bolt end which extends through said screw hole to be in abutting engagement with the respective one of said slide rails;
• and
• two mounting brackets respectively mounted on said slide rails for mounting the blind thereon;
• wherein, through rotation of said screw bolts, said abutting plates are movable in the up-down direction between a tightening position, where an upper surface of each of said abutting plates is in upwardly abutting engagement with said connecting rail so that said connecting rail is in tight contact with said slide rails by a frictional force so as to prevent sliding movement of said slide rails relative to said connecting rail, and a loosening position, where said upper surface of each of said abutting plates is moved away from said connecting rail so as to permit the sliding movement of said slide rails relative to said connecting rail along the lengthwise direction.