The utility model relates to a shell structure used for mosquito prevention sheets.The shell is a hollow rectangular box body.One side has an opening.For mosquito repellents to be placed inside,The shell has a wall surface opposite to each other in two positions.A plurality of pores are distributed on each wall.There is a date marking area and a January marking area on one of the walls of the shell.The date marking area includes a date scale and a linear sliding date marker.The monthly mark area has a monthly scale and a linear sliding monthly mark.So when the mosquito repellent piece is put into the shell,Adjust the location of date markers and month markers in the date mark area and month mark area.It can remind consumers to replace the mosquito repellent after the expiration of its volatilization period.一種用於防蚊片之殼體結構，該殼體為中空的長方型盒體，一側具有一開口，以供防蚊片置入內部，該殼體具有兩個位置相對的壁面，每個壁面分佈著複數個氣孔；在該殼體的其中一該壁面處具有一日期標示區及一月份標示區，該日期標示區包括有日期刻度及可線性滑動的日期標記件，該月份標示區則有月份刻度及可線性滑動的月份標記件；藉此當該防蚊片置入該殼體後，調整該日期標示區及月份標示區之日期標記件及月份標記件的位置，就能提醒消費者在防蚊片藥劑揮發期限到期後進行更換。
