초록 ▼

The present invention provides a lotion pump, comprises: a nozzle head; a plunger connected with the nozzle head, in which an upper one-way valve is disposed; a container cap which is engaged with a mouth of a bottle; a housing, its upper end is connected to the container cap, and on its lower end t

The present invention provides a lotion pump, comprises: a nozzle head; a plunger connected with the nozzle head, in which an upper one-way valve is disposed; a container cap which is engaged with a mouth of a bottle; a housing, its upper end is connected to the container cap, and on its lower end there is a lower one-way valve; and a spring, its lower end abuts against the bottom of the housing, and its upper end abuts against the head of the plunger; characterized in that, the diameter of an upper portion of the plunger is larger than that of a lower portion of the plunger, thereby a step is formed at the position where the diameter is changed, said step forms a valve seat for said upper one-way valve. The lotion pump of the present invention can be realized by a very simple structure, minimum parts and a very low manufacturing cost. While greatly increasing the productivity, it can obtain good sealing and leak-proof performance.

대표청구항 ▼

1. A lotion pump, comprising: a nozzle head only including an integrally formed nozzle head body, the nozzle head body having an outlet and an inlet;a plunger connected with the inlet of the nozzle head, in which an upper one-way valve is disposed, the plunger only including an integrally formed plu

1. A lotion pump, comprising: a nozzle head only including an integrally formed nozzle head body, the nozzle head body having an outlet and an inlet;a plunger connected with the inlet of the nozzle head, in which an upper one-way valve is disposed, the plunger only including an integrally formed plunger body, the plunger body having an upper portion that has a larger inner diameter and a lower portion that has a smaller inner diameter, an outer diameter of the upper portion of the plunger being larger than an outer diameter of the lower portion of the plunger, the upper and lower portions of the plunger body being connected at a stepped portion of the plunger, a valve seat being formed between the upper and lower portions, the plunger body further having an integrally formed sealing plug extending downwardly therefrom;a housing, in which a lower one-way valve is disposed, the housing only including an integrally formed housing body, the housing body having an integrally formed sealing ring engageable with the sealing plug to prevent lotion from leakage;a container cap only including a cap body secured to the housing body; anda return spring disposed in the housing for restoring a position of the nozzle head, an upper end of the return spring being positioned to abut a head of the plunger, a lower end of the return spring positioned to abut the housing,wherein the nozzle head is operable between a locked position where axial movement of the nozzle head relative to the housing is prevented and an unlocked position where the nozzle head is axially movable relative to the housing,wherein a first air groove is formed between an outer side of an upper end of the housing and a corresponding portion of the container cap, a second air groove is formed between an inner side of the upper end of the housing and a corresponding portion of the container cap, and a gap is formed between an upper end surface of the housing and a corresponding portion of the container cap, the first air groove, the second air groove and the gap communicate with each other to allow air outside of the housing to communicate with air inside the housing. 2. The lotion pump according to claim 1, wherein an inner ring is disposed in the container cap, any one of at least one guiding groove and at least one guiding block is disposed on the inner ring, and the other one of the at least one guiding groove or the at least one guiding block is disposed on the lower portion of the plunger. 3. The lotion pump according to claim 2, wherein on the lower surface of the inner ring and on the upper surface of the guiding block, there is an engagement means for making them engage with each other. 4. The lotion pump according to claim 2, wherein one side of a lower portion of the guiding groove is in an arc shape, and on the other side there is a protrusion to limit the rotation range of the guiding block. 5. The lotion pump according to claim 1, wherein said container cap and said housing are connected by means of ribs and grooves. 6. The lotion pump according to claim 2, wherein at the position where the upper portion of the container cap engages with the plunger, a waterproof ring extends upwardly, said waterproof ring seals with the upper portion of the plunger when the nozzle head is locked by engagement between the guiding groove and the guiding block. 7. The lotion pump according to claim 1, wherein the nozzle head has a downward protruding inner pipe, which is inserted into the plunger to connect therewith. 8. The lotion pump according to claim 7, wherein an inner hole of the inner pipe is a non-round hole. 9. The lotion pump according to claim 1, further comprising an inner ring disposed in the container cap, the inner ring being surrounded by an inner side of the container cap, the upper end of the housing being disposed between the inner ring and the inner side of the container cap and forming a longitudinal passageway, the longitudinal passageway including the first and second air grooves and the gap.