The novel hand-pressing coffee
machine comprises a
machine body, a first filter screen and a pressing rod
assembly, a
water storage cavity is formed in the upper portion of the
machine body, an extraction cavity is formed in the lower portion of the machine body, and a water
inlet channel communicated with the
water storage cavity and the extraction cavity is formed in the middle of the machine body; the first filter screen is arranged in the machine body and is positioned between the water
inlet channel and the extraction cavity; a plurality of first filter holes are formed in the first filter screen; the pressing rod
assembly comprises a shell installed on the top of the machine body and a pressing rod movably arranged in the shell in a penetrating mode, one end of the pressing rod stretches into the water
inlet channel, a
piston head is arranged at the end of the pressing rod, and an annular limiting clamping groove and a water inlet groove communicated with the limiting clamping groove are formed in the outer side wall of the
piston head. The sealing structure further comprises a sealing ring which is arranged on the
piston head in a sleeving mode and located in the limiting clamping groove, and the outer side portion of the sealing ring abuts against the inner side wall of the water inlet channel to form waterproof sealing. When the pressing rod is driven to move up and down, the piston head can be synchronously driven to move up and down and abuts against the sealing ring through the limiting clamping groove so as to drive the sealing ring to move up and down. When the piston head moves upwards, water located on the upper portion of the piston head can flow into the lower portion of the piston head through the water inlet groove under the action of pressure. When the piston head moves downwards, water located on the lower portion of the piston head can be pressed into the extraction cavity. Therefore, water inflow and water outflow in the water inflow channel can be achieved through up-down moving fit of the piston head and the sealing ring, the structure is simple, the number of parts is small, meanwhile, the requirement for the
assembly precision of the parts is low, and the assembly efficiency is high.