The invention provides a protective cover structure of a lawn mower.The utility model provides a protective cover structure design for the safety of mowing protection of a hand-held shoulder back type mower.It is mainly on the upper part of the cutter group assembled at the end of the holding rod of the mower.Prefabricated plastic cover,According to the protection cover, a locking groove seat corresponding to the inclination of the holding rod is preset.It is directly sleeved over the grip bar surface.Then, the lower edge of the rod surface covers the rod with a locking piece with a symmetrical concave arc.Then lock and position with bolts and locknuts.Make it completely cover the rotating ring diameter of the blade.To prevent foreign matters from flying out when mowing.And on the side of the cover body opposite to the groove seat,Two opposite perforated seats shall be reserved.A U-shaped positioning frame rod is inserted for the lock.Provide the adjustment and transformation of the cover body edge and assembly height.The cover body has the assembly adjustment of mowing length.Provide the convenience of mowing operation and the purpose of safe use.本創作一種割草機之防護蓋結構，係一種提供手持肩背覆式割草機割草防護安全用的護蓋結構設計，主要於割草機的握持桿末端組裝刀具組的上方，以預製成型的塑性護蓋，依護蓋上預設與握持桿傾斜相稱的鎖固槽座，直接套設於握持桿面上方，再由桿面下緣以對稱凹弧的鎖固片包覆桿具，再以螺栓及防鬆螺帽鎖裝定位，使其完全罩覆刀片的轉動環徑，達到割草時防止異物飛噴出，又於槽座相對一側的蓋體邊面，設留兩個相對的穿孔座，供鎖插一呈U形狀的定位架桿，提供蓋體邊面及組裝貼地高低的調整變換，使蓋體兼具割草長度的組裝調整，提供割草操作的便利及安全使用目的。
