Locking device for fan and its front and rear grilles

Abstract

The invention discloses a fan and a locking device of a front mesh enclosure and a back mesh enclosure of the fan. The locking device of the front mesh enclosure and the back mesh enclosure comprises a C-shaped locking ring which is used for surrounding a buckle connection position of the front mesh enclosure and the back mesh enclosure and is provided with an opening. Two end heads of the locking ring are matched through connection in an inserting mode. Long holes which extend along the circumference of the locking ring in the length wise direction and penetrate two end faces of a locking ring body in the depth wise direction are respectively arranged in the two end heads which are matched through the connection in the inserting mode, the two end heads of the locking ring are connected together through a wedge-shaped locking block which is arranged in the long holes in a penetrating mode and is matched with the long holes in a rotation stop mode. At least one of two side surfaces, facing hole ends of the long holes, of the locking block is a wedge-shaped inclined surface of the locking block, the locking block is fixedly connected with the locking ring through a bolt which is arranged on a small end face of the locking block in a rotation mode, and the locking ring drives the locking block to move in the long holes along with the rotation of the bolt, so that hole shrinkage of the locking ring is achieved. The two side surfaces of the locking block are respectively contacted with and cooperated with the hole ends, adjacent to the opening, of the long holes of the two end heads of the locking ring when the locking ring is tightened.

Description

technical field [0001] The invention relates to a locking device for a fan and its front and rear net covers. Background technique [0002] The fan generally includes a front grille and a rear grille, and the fan grille has the effect of protecting the fan blades and personal safety, so the locking devices of the front grille and the rear grille are very important. The locks of the front and rear grilles of the fan in the prior art The tightening device mainly includes a plastic locking ring mechanism and an iron buckle mechanism. The iron buckle mechanism is to install a movable iron buckle on the edge of one of the fan guards, and fix it with the other net cover by buckling. Although the iron buckle mechanism is strong and durable, it is prone to the problem of loose buckle during use; plastic The locking ring mechanism is a plastic locking ring with a C-shaped opening that surrounds the buckle junction of the front and rear grilles of the fan. Fit in the groove, and the...

AI Technical Summary

Problems solved by technology

Although the plastic ring locking mechanism has a simple structure, it cannot adjust the tightness during use. When the plastic locking ring expands with heat and contracts with cold, it will loosen the front and rear grilles of the fan.

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