The utility model relates to a pressure cover composition of a popcorn machine.A pressure cover unit is pivoted at one end of the opening of the material barrel which is allowed to put preset food materials.The pressure cover unit comprises a base member to allow a rod section extending at one end of the pressure cover to pass through the middle part.The outer end of the section is limited to the foundation member.So that the pressure cap can make the necessary up and down displacement between the foundation parts,And the outer side of the foundation part is concave with a gap toward the opening of the material barrel.A shaft segment on one side of the bending piece pivoted by a supporting part which is allowed to be led into the outer extension of the periphery of the barrel opening.The non-circular shaft segment of the bending part driven by the external pull can be urgently resisted in the gap of the foundation part.The pressure cover unit can be locked / released by a preset pressing cover body under quick operation to open the cover body.一種爆米花機壓力蓋組成，是採在：作為允許置入預設食材的料桶在一端開口是樞設一壓力蓋單元，該壓力蓋單元是含括一基礎件以在中間部位允許一壓力蓋一端延伸的桿段貫穿其間、並使該截桿段靠外一端受限在基礎件，以利壓力蓋能在基礎件之間作所須的上下位移，及在基礎件的靠外一側是朝料桶開口部位凹設以缺口，以被允許引入在料桶開口周邊朝外延伸的一截支持部樞設的彎件其一側軸段，一併外扳該彎件驅使其非圓形的軸段能呈迫切抵制在基礎件的缺口內，使壓力蓋單元可在快速操作下獲有一預設迫緊的蓋體鎖固/或被釋放以打開蓋體。
