A trigger-type pump dispenser includes a housing 11 with a front cylinder part 11A and a rear inverted-L-shaped grip part 11B integrally formed, a nozzle base 12 attached to the housing 11 and having a front nozzle part 11C mounted thereon, a piston structure configured of a hollow-shaped piston 15 and a hollow-shaped piston shaft 16 and sliding inside the cylinder part, a spring 17 which presses the piston structure 14 upward, a trigger 13 positioned above the housing 11, having a front tip rotatably mounted on the housing 11, and having a mid part where a tip of the hollow-shaped piston shaft 16 abuts, and a valve rod 18 disposed at a center part of the cylinder part 11A.

A pump including an inlet one-way valve; a pump chamber downstream of and in fluid communication with the inlet one-way valve; a piston slideably engaged with the pump chamber; a piston cavity within the piston and in fluid communication with the pump chamber; a liquid accumulator operable within the piston cavity; an actuator engaged with piston; and an outlet one-way valve downstream of and in fluid communication with the pump chamber.

An all-plastic, continuous trigger sprayer is contemplated that avoids the use of metal parts, elastomers, or other disparate and non-recyclable materials. A reservoir diaphragm is provided within the sprayer head, interposed between the actuation mechanism and the outlet, so as to ensure a steady flow of dispensed fluid is delivered even after actuation has ceased.

The spray head capable of spraying continuously comprises a main body having a liquid passage; a head cap; a spray one-way valve; an operating handle; and a pump. The liquid passage comprises a transverse passage and a vertical passage which communicate with each other. A pressure continuation sealing seat capable of moving up and down is disposed inside a sleeve, a pressure continuation chamber is defined on a top of the pressure continuation sealing seat. The pressure continuation spring is supported between the pressure continuation spring seat and the pressure continuation sealing seat, driving the pressure continuation sealing seat to move upward so as to continuously extrude liquid in the pressure continuation chamber out to the transverse passage. The present invention is simple and reasonable in structure, convenient to assemble, low in cost without additional housing disposed outside the main body, and good in universality.

The spray head capable of spraying continuously comprises a main body having a liquid passage; a head cap; a spray one-way valve; an operating handle; and a pump. The liquid passage comprises a transverse passage and a vertical passage which communicate with each other. A pressure continuation sealing seat capable of moving up and down is disposed inside a sleeve, a pressure continuation chamber is defined on a top of the pressure continuation sealing seat. The pressure continuation spring is supported between the pressure continuation spring seat and the pressure continuation sealing seat, driving the pressure continuation sealing seat to move upward so as to continuously extrude liquid in the pressure continuation chamber out to the transverse passage. The present invention is simple and reasonable in structure, convenient to assemble, low in cost without additional housing disposed outside the main body, and good in universality.

A trigger-type liquid sprayer including a sprayer body mounted on a container body, a nozzle member having a spray hole, and an invertible adapter. The sprayer body includes a longitudinal supply cylinder part, a trigger mechanism having a trigger part, a storage cylinder, and a storage plunger. The invertible adapter includes an adapter main body configured to form a first and second space, the first space configured to bring the container body in communication with an inside of the longitudinal supply cylinder part through an upright introduction port, and the second space configured to bring an inside of the container body in communication with the first space through an inverted introduction port, and a changeover valve configured to block communication between the first and second spaces when the container body is upright and bring the first and second spaces in communication with each other when the container body is inverted.