Vacuum sealer

A vacuum sealer, comprising an upper casing (1) with a first vacuum contact surface, and a lower casing (2) with a second vacuum contact surface, one side of the upper casing (1) and one side of the lower casing (2) are hinged together, wherein a projecting handle (4) is provided at another side of the upper casing (1), a mount pad (18) and a rotation shaft (9) in contact with the handle (4) are provided on the upper casing (1), the rotation shaft (9) is installed rotatably on the mount pad (18) via at least one positioning pad, the rotation shaft (9) is connected with at least one guiding wheel (15), at least one projecting guiding block (15.1) and at least one sliding chute (15.2) are provided at another side of the at least one guiding wheel (15), the at least one sliding chute (15.2) is provided in the at least one guiding wheel (15), one side of at least one locking hook (8) is hinged on the at least one positioning pad, at least one positioning slot (8.1) is provided in an intermediate portion of the at least one locking hook (8), at least one guiding block (15.1) is inserted in the at least one positioning slot (8.1), a first guiding shaft (8.3) is provided on another side of the at least one locking hook (8), the first guiding shaft (8.3) is plugged in the at least one sliding chute (15.2), at least one positioning hole (7) is provided in the lower casing (2), when pressing the handle (4) downward, the at least one guiding wheel (15) and the at least one locking hook (8) are driven to rotate so that a hook of the at least one locking hook (8) is inserted into the at least one positioning hole (7) and lock the upper casing (1) and the lower casing (2) together.