Small manual coffee maker

1 . A small manual coffee maker, comprising a cup body and a coffee brewing base that are detachably connected together, a lower end of the cup body is connected to the coffee brewing base, a water chamber and a pressure chamber are disposed in the cup body, a coffee brewing chamber and at least a coffee outlet passage are disposed in the coffee brewing base, the cup body is provided with at least a water inlet passage that connects to and communicates with the pressure chamber and at least a water outlet passage that communicates with the pressure chamber and the coffee brewing chamber, the bottom of the water chamber is provided with at least a water inlet in communication with the water inlet passage, the water inlet passage is provided with a water inlet one-way valve which can control the one-way flow of water from the water inlet passage to the pressure chamber, the water outlet passage is provided with a water outlet one-way valve which can control the one-way flow of water from the pressure chamber to the coffee brewing chamber, the cup body is provided with a piston rod with one end extending into the pressure chamber;

wherein a height of the water inlet is lower than or equal to a height of the pressure chamber;

wherein the water inlet passage and the water outlet passage are located below the pressure chamber; and

wherein the cup body with the water chamber disposed therein defines a central longitudinal axis extending along a height of the cup body, the pressure chamber and the piston rod extend along a radial direction perpendicular to the central longitudinal axis, and the water inlet passage and the water outlet passage extend parallel to the central longitudinal axis.

2 . The small manual coffee maker according to claim 1 , wherein a bottom end of the cup body connected with the coffee brewing base is provided with at least a communication groove in communication with the water inlet and the water inlet passage, a lower end of the communication groove is opened, the water inlet one-way valve is installed into the water inlet passage from an opening at the lower end of the communication groove, the bottom end of the cup body is provided with a mounting cover that covers the opening at the lower end of the communication groove.

3 . The small manual coffee maker according to claim 2 , wherein the water inlet one-way valve comprises a valve body disposed in the water inlet passage and supported by the mounting cover, the valve body is provided with a valve body hole, and the water inlet passage is provided with a water inlet valve core that can block the valve body hole.

4 . The small manual coffee maker according to claim 3 , wherein one end of the water inlet passage is provided with a water inlet communication hole in communication with the pressure chamber, the water inlet valve core is spherical, and the water inlet communication hole is positioned above the water inlet valve core and is a square hole.

5 . The small manual coffee maker according to claim 2 , wherein one end of the water outlet passage is provided with a water outlet communication hole in communication with the water chamber, the bottom end of the cup body connected with the coffee brewing base is provided with a sink, the water outlet passage and the communication groove are positioned on a bottom wall of the sink, the mounting cover is fixed in the sink, the mounting cover is provided with a sealing head with one end extending into the communication groove to seal between the communication groove and the sink, the mounting cover is provided with at least a water outlet in communication with the water outlet passage and the coffee brewing chamber, the water outlet one-way valve comprises a first elastic member supported by the mounting cover, an upper end of the first elastic member is provided with a water outlet valve core that can block the water outlet communication hole.

6 . The small manual coffee maker according to claim 1 , wherein a lower end of the cup body is provided with a connection opening connected with the coffee brewing base, the cup body is provided with a valve base that separates the connection opening and the water chamber, the pressure chamber, the water inlet passage and the water outlet passage are all disposed on the valve base.

7 . The small manual coffee maker according to claim 6 , wherein the valve base and the cup body are integrally formed.

8 . The small manual coffee maker according to claim 6 , wherein an upper end of the valve base is provided with a pressure relief groove, at least a pressure relief passage and at least a pressure relief hole which are communicated in sequence, an open end of the pressure relief groove is in communication with the water chamber, the pressure relief hole is in communication with the pressure chamber, the pressure relief passage is provided with a pressure relief valve core for blocking the pressure relief hole and a second elastic member elastically pressed on the pressure relief valve core, the pressure relief groove is provided with a pressure relief cover pressed against the second elastic member and an end cover pressed against the pressure relief cover to cover the opening of the pressure relief groove.

9 . The small manual coffee maker according to claim 1 , wherein an upper end of the cup body is provided with at least an opening, the cup body is provided with a cup lid that covers the opening of the cup body.