Elastic bag foam pump

Abstract

The invention discloses an elastic bag foam pump, which comprises a bottle cover (1), an elastic bag (2), a piston rod (3), a piston (4), a liquid inlet one-way valve (6) and a gas inlet one-way valve (8), wherein the elastic bag (2) is a hollow thin-wall bag; the bag opening of the elastic bag is provided with a connection part (2.1); the connection part (2.1) is mounted on an annular wall (1.1) used for connection on the bottle cover (1) in a sealing way; the elastic bag (2) is provided with an inlet hole (1.8) through which an inlet pipe (2.4) is communicated with the bottle cover (1); the gas inlet one-way valve (8) is mounted at one side of the inlet hole (1.8); a piston rod upper end (3.1) is fixed to an upper wall connection part (2.3) of the elastic bag (2); the lower end of the piston rod (3) is provided with the piston (4); and a cylinder (1.2) is arranged in the middle of the bottle cover (1). The elastic bag foam pump has the advantages of simple structure, low cost and easy to use.

Claims

1. An elastic bag foam pump, a bottle cover (1), an elastic bag (2), a piston rod (3), a piston (4), a liquid inlet one-way valve (6) and a gas inlet one-way valve (8), wherein the elastic bag (2) is a hollow thin-wall bag; the bag opening of the elastic bag is provided with a connection part (2.1); the connection part (2.1) is mounted on an annular wall (1.1) used for connection on the bottle cover (1) in a sealing way; the elastic bag (2) is provided with an inlet hole (1.8) through which an inlet pipe (2.4) is communicated with the bottle cover (1); the gas inlet one-way valve (8) is mounted at one side of the inlet hole (1.8); a main body of an elastic bag air pump is made up of the elastic bag and the bottle cover; a main body of a liquid piston pump is made up of the piston rod (3), the piston (4) and a cylinder of the bottle cover; a piston rod upper end (3.1) is fixed to an upper wall connection part (2.3) of the elastic bag (2); the lower end of the piston rod (3) is provided with the piston (4); and a cylinder (1.2) is arranged in the middle of the bottle cover (1), a pipe orifice (1.3) is arranged on the bottom of the cylinder (1.2), the upper end of the pipe orifice (1.3) is provided with the liquid inlet one-way valve (6), the lower end of the pipe orifice (1.3) is communicated with a guide pipe (7); the piston rod (3) is communicated with the piston (4) and stretches into the cylinder (1.2) with the same, an outside wall of the piston form a dynamic sealing to the inner wall of the cylinder (1.2), the elastic bag foam pump is further provided with an outlet mixed channel of liquid and air; the upper end exterior of the cylinder (1.2) on the bottle cover (1) is provided with a storage tank (1.4) surrounded by small annular wall, the storage tank is communicated with a foam tank (1.6) to a bottle cover outlet (1.7), an overflow port (1.5) is arranged between the storage tank (1.4) and the foam tank (1.6), a foam screen (9) is arranged in the foam tank (1.6); a storage tank cover (5) is arranged on the storage tank (1.4) and the foam tank (1.6); the storage tank cover (5) is an elastic body, used for fixing to the annular wall of the storage tank and an outside wall of the foam tank in a sealing way, a first hinge (5.1) is arranged on the storage tank cover (5) and opposite to the overflow port (1.5) to form an outlet one-way valve; the storage tank cover (5) is provided with a circular hole (5.2), through which the piston rod (3) can pass, an annular space formed between the circular hole (5.2) and the piston rod (3) is an air channel of the elastic bag (2); the upper end of the piston (4) is provided with a liquid outlet one-way valve (4.1), the side wall of the piston rod (3) is provided with an outlet hole (3.2) for the flowing of liquid into the storage tank (1.4); a space defined between the storage tank (1.4), the foam tank (1.6) and the storage tank cover (5) is an outlet mixed channel of liquid and air, the outlet mixed channel of liquid and air, the outlet mixed channel outputs foam to a nozzle (2.2) of the elastic bag (2) lower side wall.

2. The elastic bag foam pump according to claim 1, characterized in that the bottle cover (1) is provided with a seal ring (12), a second hinge (12.1) on the seal ring (12) is opposite to a balancing small hole (1.9) of the bottle cover (1).

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a structure diagram for elastic bag foam pump of embodiment 1 according to the present invention.

(2) FIG. 2 is a structure diagram for elastic bag foam pump of embodiment 2 according to the present invention.

(3) FIG. 3 is a structure diagram for elastic bag foam pump of embodiment 3 according to the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(4) The present invention is further described with reference to drawings and embodiments.

Embodiment 1

(5) Refer to FIG. 1, an elastic bag foam pump, characterized in that it comprises a bottle cover (1) an elastic bag (2), a piston rod (3), a piston (4), a liquid inlet one-way valve (6) and a gas inlet one-way valve (8), wherein the elastic bag (2) is a hollow thin-wall bag; the bag opening of the elastic bag is provided with a connection part (2.1); the connection part (2.1) is mounted on an annular wall (1.1) used for connection on the bottle cover (1) in a sealing way; the elastic bag (2) is provided with an inlet hole (1.8) through which an inlet pipe (2A) is communicated with the bottle cover (1); the gas inlet one-way valve (8) is mounted at one side of the inlet hole (1.8); a main body of an elastic bag air pump is made up of the elastic bag and the bottle cover; a main body of a liquid piston pump is made up of the piston rod (3), the piston (4) and a cylinder of the bottle cover;

(6) An piston upper end (3.1) is fixed to an upper wall connection part (2.3) of the elastic bag (2); the lower end of the piston rod (3) is provided with the piston (4); and a cylinder (1.2) is arranged in the middle of the bottle cover (1), a pipe orifice (1.3) is arranged on the bottom of the cylinder (1.2), the upper end of the pipe orifice (1.3) is provided with the liquid inlet one-way valve (6), the lower end of the pipe orifice (1.3) is communicated with a guide pipe (7), the guide pipe (7) is used for stretching into exterior lotion bottle; the piston rod (3) is communicated with the piston (4) and stretches into the cylinder (1.2) with the same, an outside wall of the piston form a dynamic sealing to the inner wall of the cylinder (1.2); the elastic bag foam pump is further provided with an out et mixed channel of liquid and air.

(7) The upper end exterior of the cylinder (1.2) on the bottle cover (1) is provided with a storage tank (1.4) surrounded by small annular wall, the storage tank is communicated with a foam tank (1.6) to a bottle cover outlet (1.7), an overflow port (1.5) is arranged between the storage tank (1.4) and the foam tank (1.6), a foam screen (9) is arranged in the foam tank (1.6); a storage tank cover (5) is arranged on the storage tank (1.4) and the foam tank (1.6); the storage tank cover (5) is an elastic body, used for fixing to the outside wall of the storage tank and the foam tank in a sealing way, a first hinge (5.1) is arranged in the storage tank cover (5) and opposite to the overflow port (1.5) to form an outlet one-way valve; the storage tank cover (5) is provided with a circular hole (5.2), through which the piston rod (3) can pass, an annular space formed between the circular hole (5.2) and the piston rod (3) is an air channel of the elastic bag (2); the upper end of the piston (4) is provided with a liquid outlet one-way valve (4.1), the side wall of the piston rod (3) is provided with an outlet hole (3.2) for the flowing of liquid into the storage tank (1.4); a space between the storage tank (1.4), the foam tank (1.6) and the storage tank cover (5) is a outlet mixed channel of liquid and air, the outlet mixed channel outputs foam to a nozzle (22) of the elastic bag (2) lower side wall.

(8) When the elastic bag (2) is compressed, the piston rod goes downsides, the liquid is mixed with the entered air through the outlet hole (3.2) of the piston rod (3) and the storage tank (1.4), and push a first hinge (5.1) away through the overflow port (1.5) to enter into the foam tank (1.6) to foam, the foam is exhausted from a bottle cover outlet (1.7) and the nozzle (2.2) of elastic bag outlet; when the compressing is stopped, the elastic bag (2) rebounds, gas pushes the gas inlet one-way valve away through an elastic bag inlet hole (2.4) and a bottle cover inlet hole (1.8) and enters into the elastic bag (2), the elastic bag (2) also brings the piston rod (3), so that the liquid is breathed in the cylinder (1.2) though the liquid inlet one-way valve (6).

(9) The gas inlet one-way valve (8) can be located other position with elastic bag inlet hole, which can be assembled by Philips screwdriver; the assembly of this elastic bag foam pump requires 6 injection parts and 4 injection moulds.

(10) The bottle cover (1) is provided with a seal ring (12) and a second hinge (12.1) opposite to a balancing small hole (1.9) of the bottle cover (1).

(11) The liquid inlet one-way valve, gas inlet one-way valve, outlet one-way valve of above example can be replaced. As the common foam pump, using pressure plate and piston rod to form buckle and connection mode with sealing face, the gas inlet one-way valve can also be formed, the liquid piston and outlet one-way valve can also be assembled in a similar way. In this way, one or two sets of injection moulds will be required; however, the total parts of the elastic bag foam pump will be less than 8.

Embodiment 2

(12) Refer to FIG. 2, an elastic bag foam pump comprises an elastic bag air pump and a liquid piston pump, comprising a bottle cover (1), an elastic bag (2), a piston rod (3), a piston (4), a spray head (10), a gas inlet one-way valve (8), a liquid inlet one-way valve (6) and a liquid outlet one-way valve (11), wherein the elastic bag (2) is a hollow thin-wall bag; the bag opening of the elastic bag is provided with a connection part (2.1); the connection part (2.1) is mounted on an annular wall (1.1) used for connection on the bottle cover (1) in a sealing way, the elastic bag is provided with an inlet hole (2.4) opposite to the bottle cover inlet hole (1.8), one side of the bottle cover inlet hole (1.8) is provided with a liquid inlet one-way valve (8).

(13) For the liquid piston pump, the piston rod upper end (3.1) is provided with a liquid outlet (3.3), which is fixed to the upper wall connection part (2.3), a gas outlet of the elastic bag is also arranged on the upper wall connection part (2.3), one or two outlet one-way valves (11) are arranged in the upper wall connection part (2.3); the upper end of the upper wall connection part (2.3) is communicated with the spray head interface (10.1) in a sealing way, one side of the spray head (10) is provided with the foam screen (9), one end of the foam screen (9) stretches into the nozzle of the spray head (10). A cylinder (1.2) is arranged in the middle of the bottle cover, a pipe orifice (1.3) is arranged on the bottom of the cylinder, the upper end of the pipe orifice is provided with the liquid inlet one-way valve (6), the lower end of the pipe orifice is communicated with a guide pipe (7), the guide pipe (7) is used for stretching into exterior lotion bottle; the lower end of the piston rod is provided with the piston (4), the piston rod (3) and the piston (4) stretch into the cylinder (1.2) of the bottle cover together, the outside wall of the piston (4) form a dynamic sealing to inner wall of the cylinder (12).

(14) When the spray head (10) is compressed, the elastic bag (2) is shrunken, and the piston rod (3) goes downsides, gas in elastic bag (2) and liquid in cylinder (1.2) enter into the outlet mixed channel in the spray head (10) through the outlet one-way valve (11), and carry out mixing foam through the foam screen (foam sponge), the foam is exhausted from the nozzle (2.2) of the spray head (10).

(15) When the compressing is stopped, the elastic bag (2) rebounds, air pushes the gas inlet one-way valve away through elastic bag inlet hole (2.4) and bottle cover inlet hole (1.8) and enters into the elastic bag (2), the elastic bag (2) also brings the piston rod (3), so that the liquid is breathed in the cylinder (1.2) though the liquid inlet one-way valve (6).

(16) The assembly of this elastic bag foam pump requires 7 injection parts and 4 injection moulds.

(17) The elastic bag (2) is formed around the helical thick wall and thin wall.

(18) The bottle cover (1) is provided with a seal ring (12), a second hinge (12.1) on the seal ring (12) is opposite to a balancing small hole (1.9) of the bottle cover (1).

(19) It is obvious that if one elastic bag is assembled with two piston pumps respectively pumping different liquids of two bottles (or two flexible containers), the hair color foam bottle can be made.

(20) The following embodiment is to explain the elastic bag foam pump has great extension space, the skilled in the art can easily design the elastic bag foam pump structured as follows.

Embodiment 3

(21) Refer to FIG. 3, the elastic bag foam pump comprises an elastic bag air pump and an elastic bag liquid pump, comprising a bottle cover (1), two elastic bodies (2a,2b) and a spray head (10); the elastic bodies (2a,2b) are the main body of the elastic bag air pump and the elastic bag liquid pump respectively, the elastic bag (2b) is in the elastic bag (2a), the upper end of which are provided with a gas outlet hole (2.5a) and a liquid outlet hole (2.5b) respectively that opens to the elastic bag connection part (2.3), an outlet one-way valve (11) is arranged in the connection part, the upper end of the connection part (2.3) on the top of the elastic bag is communicated with the interface (10.1) of the spray head (10) in a sealing way, one side of the spray head outlet is provided with a sponge foam screen (9). For the elastic bag (2a,2b), the bag openings (2.1a,2.1b) are respectively communicated with the connection part (1.1a,1.1b) of big and small annular wall of the bottle cover, the elastic bag (2a) is provided with an inlet hole (2.4a), which is opposite to the inlet hole (1.8) of the bottle cover annular wall (1.1a), one side of the bottle cover inlet hole (1.8) is provided with the gas inlet one-way valve (8).

(22) The cylinder (1.2) is arranged in the middle of the bottle cover, a pipe orifice (1.3) is arranged on the bottom of the cylinder, the upper end of the pipe orifice is provided with the liquid inlet one-way valve (6), the lower end of the pipe orifice is communicated with a guide pipe, the guide pipe is used for stretching into exterior lotion bottle; an independent space of the cylinder (1.2) is formed by the elastic bag (2b) and connection part (1.1b) of small annular wall of bottle cover.

(23) The elastic bags (2a, 2b) are formed around the helical thick wall and thin wall.

(24) The bottle cover is provided with a seal ring 12 and a second hinge 12.1 opposite to a balancing small hole 1.9 of the bottle cover.

(25) The assembly of this elastic bag foam pump requires 5 injection parts and 3-4 injection moulds.

(26) Any corresponding variations and deformation based on above described technical schemes and conceptions to the skilled in the art are also considered within the protective scope of the present invention.