| 摘要 |
A fluid formulation distribution and spray pump, comprising a piston (10), a pump body (20), a plunger (30) and a distribution head (40); the piston (10) comprises a first piston (11) and a second piston (12) both cylindrical in shape and disposed in the same axial direction; the first piston (11) is located in the second piston (12); the tail ends of the first piston (11) and the second piston (12) are connected to each other in a closing manner; a cavity (13) having an enclosed bottom is formed between the first piston (11) and the second piston (12); the pump body (20) comprises a first pump body (21) and a second pump body (22) both cylindrical in shape and disposed in the same axial direction; the first pump body (21) is disposed in the second pump body (22); the first pump body (21) and the second pump body (22) are fixedly connected to each other via a radial grid frame (23); a fluid channel (24) is disposed between the outer cylinder wall of the first pump body (21) and the inner cylinder wall of the second pump body (22); the first piston (11) and the second piston (12) hermetically slide in the first pump body (21) and the second pump body (22) respectively; the first pump body (21) is provided with a one-way valve (25) therein; a first pump cavity (211) is formed between the one-way valve (25) and the first piston (11) in the first pump body (21); the cavity (13) having an enclosed bottom communicates with the fluid channel (24) to form a second pump cavity. The hydraulic core member of the spray pump is divided into a pump body and a plunger capable of being injection-molded respectively, thus reducing various difficulties in integral forming without preserving an air channel activation structure, thus simplifying the process. The present invention can be widely used in the fields of medical treatment, cosmetics, perfume and the like. |
