CN216444168U

CN216444168U - Emulsion pump with anti-overflow structure

Info

Publication number: CN216444168U
Application number: CN202122754255.5U
Authority: CN
Inventors: 丁祥
Original assignee: Taixing KK Plastic Co ltd
Current assignee: Taixing KK Plastic Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-05-06
Anticipated expiration: 2031-11-11

Abstract

The utility model provides an emulsion pump with anti-overflow liquid structure, includes pressure head, facing, cylinder and piston rod, and the upper end of piston rod is connected on the pressure head, and is provided with the piston on the piston rod, and the facing is connected with the cylinder, and the hole of facing is passed including the part of piston to the piston rod to in stretching into the inner space of cylinder, wherein, be provided with balanced gas pocket on the cylinder. The lotion pump of the present invention further comprises an anti-spill member mounted on the cylinder and forming a check valve for the balance air hole, the check valve allowing flow from the inner space of the cylinder to the inside of the container in which the lotion pump is mounted through the balance air hole but preventing flow from the inside of the container to the inner space of the cylinder. The emulsion pump can prevent the product from overflowing through the balance air hole.

Description

Emulsion pump with anti-overflow structure

Technical Field

The present invention relates to mechanisms for pumping products such as household chemical products, and in particular to a lotion pump having an anti-spill structure. The utility model also relates to a container comprising the emulsion pump.

Background

In the field of products such as household chemicals (e.g., body washes, hand washes, shampoos, etc.), a container containing the product is fitted with an emulsion pump so that a user can easily dispense the product from the container for use. Although referred to herein as an emulsion pump, it may be capable of pumping other fluid or semi-fluid products in addition to emulsions.

The lower lock head is a common type of emulsion pump, and the emulsion pump comprises a pressure head, a tooth socket, an air cylinder and an air cylinder cover. Wherein, the pressure head links to each other with the upper end of piston rod, and the lower extreme of piston rod is provided with the piston to inside stretching into the cylinder. The cylinder cover is arranged on the upper part of the cylinder, the tooth socket is fixedly connected with the cylinder, the tooth socket is connected with the opening part of the container through a structure such as screw threads, and the cylinder extends into the container.

The air cylinder is provided with a balance air hole, and after a certain amount of product is pumped out from the container by using the emulsion pump, air is supplemented into the container through the balance air hole, so that negative pressure generated in the container after one-time pumping can be prevented, the container is shriveled, and the liquid cannot be continuously discharged.

However, the lotion pump with the balance air hole has a problem that a discharge easily occurs at a neck portion of the lotion pump when the pressing head is set to an open standby state. The overflow phenomenon occurs because the balance air hole arranged on the cylinder of the emulsion pump is a lateral balance air hole. When the pressure head is in a locking state, the product in the container flows into the air cylinder through the balance air hole, enters the space above the piston of the air cylinder and adheres to the piston rod. During transport of the product, particularly when encountering bumps or even when the container is lying sideways, the product is more likely to enter the cylinder. When the user sets the ram to a standby state, the product adhered to the piston rod moves upward along with the piston rod, and overflows from the gap between the inner hole of the mouthpiece and the piston rod. The product that spills over can pollute the neck of emulsion pump to still can block up the clearance between facing hole and the piston rod, cause behind the pump sending product outside air can't enter into the container inside, still can cause the container to inhale flat, can't continue to go out liquid.

Therefore, there is a need for further improvement of the structure of the emulsion pump to overcome the above-mentioned problems of the prior art and prevent the overflow.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above-mentioned problems occurring in the prior art. The utility model aims to provide a lotion pump with an improved structure, which is provided with an anti-overflow structure and can prevent a product in a container from overflowing.

The emulsion pump is an emulsion pump with an anti-overflow structure and comprises a pressure head, a tooth socket, a cylinder and a piston rod, wherein the upper end of the piston rod is connected to the pressure head, a piston is arranged on the piston rod, the tooth socket is connected with the cylinder, the part of the piston rod, which comprises the piston, penetrates through an inner hole of the tooth socket and extends into the inner space of the cylinder, and a balance air hole is formed in the cylinder. The lotion pump of the present invention further comprises an anti-spill member mounted on the cylinder and forming a check valve for the balance air hole, the check valve allowing flow from the inner space of the cylinder to the inside of the container in which the lotion pump is mounted through the balance air hole but preventing flow from the inside of the container to the inner space of the cylinder.

In this emulsion pump, prevent the overflow liquid component through the setting, can prevent that the product in the container of having installed this emulsion pump from overflowing via balanced gas pocket, and then avoid the emulsion pump to suck flat.

In one specific structure, the overflow preventing member includes: the anti-overflow component body is sleeved on the outer surface of the cylinder; and a thin portion extending from the spill prevention member body, the thin portion being in sealing contact with the cylinder when the spill prevention member is mounted to the cylinder.

Further, the cylinder includes a sealing plug formed to extend downward from a cylinder flange of the cylinder, and the thin-walled portion is in sealing contact with an inner circumferential surface and/or a lower end surface of the sealing plug.

In another structure, the thin wall portion is attached to the balance air hole from the outside when the spill prevention member is mounted to the cylinder.

Preferably, a first engaging portion is formed on an inner surface of the anti-spill member, and a second engaging portion is formed on an outer surface of the cylinder, the first engaging portion being engageable with the second engaging portion.

Specifically, one of the first and second engaging portions includes at least one collar formed on an inner surface of the spill prevention member body and extending in a circumferential direction, and the other of the first and second engaging portions includes at least one slot matching the at least one collar.

Further, at least a portion of the spill prevention member that is in contact with the cylinder is elastically deformable.

Drawings

There is shown in the drawings, which are incorporated herein by reference, non-limiting preferred embodiments of the present invention, the features and advantages of which will be apparent. Wherein:

fig. 1a shows a cross-sectional view of a lotion pump according to the utility model in a locked state with the press head in the down position.

Fig. 1b shows another cross-sectional view of the lotion pump of fig. 1a, in a stand-by state with the pressure head in the upper position.

Fig. 2a shows a cross-sectional view of the anti-spill member of the lotion pump of fig. 1 a.

Fig. 2b shows a perspective view of the spill-proof member of fig. 2 a.

FIG. 3 shows a cross-sectional view of the cylinder of the lotion pump of FIG. 1 a.

(symbol description)

100 emulsion pump

110 indenter

120 tooth socket

130 cylinder

131 balance air hole

132 cylinder flange

133 sealing plug

134 second engaging portion

140 piston rod

141 piston

150 anti-overflow liquid member

151 anti-overflow component body

152 thin wall part

153 first engaging part

A air

Detailed Description

In order to facilitate understanding of the present invention, specific embodiments thereof will be described in detail below with reference to the accompanying drawings. It is to be understood that only the preferred embodiment of the present invention has been shown in the drawings and should not be considered as limiting the scope of the utility model. Obvious modifications, variations and equivalents will occur to those skilled in the art on the basis of the embodiments shown in the drawings, and the technical features of the different embodiments described below may be combined with each other arbitrarily without contradiction, all of which fall within the scope of the present invention.

In the following detailed description of the present invention, terms indicating directions and orientations such as "up" and "down" are used with reference to a general orientation of the emulsion pump in a use state as shown in the drawings, and it is understood that the orientation of the emulsion pump may be changed in situations such as transportation, storage, and the like.

Fig. 1a and 1b show two cross-sectional views of a lotion pump 100 according to the present invention, wherein the lotion pump 100 of fig. 1a is in a locked state with a pressing head 110 at a lower position, and the lotion pump 100 of fig. 1b is in a standby state with the pressing head 110 open and at an upper position.

The lotion pump 100 includes a ram 110, a mouthpiece 120, a cylinder 130, and a piston rod 140. The upper end of the piston rod 140 is connected to the ram 110, and a piston 141 is further provided on the piston rod 140. The mouthpiece 120 is fixedly connected with the cylinder 130. The portion of piston rod 140 that includes piston 141 extends through the inner bore of mouthpiece 120 into the interior space of cylinder 130, and the outer race of piston 141 is in slidable sealing engagement with the inner wall of cylinder 130.

The cylinder 130 of the emulsion pump 100 is provided with a balance air hole 131, and specifically, as shown in the figure, the balance air hole 131 is provided at the upper part of the cylinder 130 and is opened towards the side. When a user presses the lotion pump 100 to pump a predetermined amount of a product out of a container in which the lotion pump 100 is installed, external air enters the inner space of the cylinder 130 through a gap between the inner hole of the mouthpiece 120 and the piston rod 140, and then enters the container through the balance air hole 131. In this way, it is prevented that after pumping the product, a negative pressure occurs inside the container, which results in the container being deflated.

An anti-overflow structure is further provided in the lotion pump 100 of the present invention to prevent the product in the container from overflowing into the inner space of the cylinder 130 through the balance air hole 131 when the lotion pump 100 is not in use. In the present invention shown in the drawings, the anti-overflow structure is an anti-overflow member 150 provided on the cylinder 130.

Fig. 2a and 2b show a cross-sectional view and a perspective view, respectively, of the spill guard member 150. As shown in the drawings, the anti-spill member 150 includes an anti-spill member body 151, and the anti-spill member body 151 has a substantially ring shape and is fitted over the outer wall of the cylinder 130. A thin wall portion 152 is formed on the anti-spill member body 151, and when the anti-spill member 150 is mounted on the cylinder 130, the thin wall portion 152 forms a check valve for balancing the air hole 131, which allows a passage from the inner space of the cylinder 130 to the inside of the container to be formed, but blocks a passage from the inside of the container to the inner space of the cylinder 130.

In one particular construction, the thin wall portion 152 extends downwardly and radially outwardly from the top of the spill prevention member body 151. Corresponding to the thin wall portion 152, as shown in fig. 3, a sealing plug 133 extending downward is formed on the cylinder flange 132 at the upper portion of the cylinder 130. When the flash prevention member 150 is mounted to the cylinder 130, the outer surface of the thin-walled portion 152 of the flash prevention member 150 is in sealing contact with the inner circumferential surface of the sealing plug 133. Alternatively or additionally, the thin wall portion 152 may also be in sealing contact with the lower end face of the sealing plug 133.

When the lotion pump 100 is in a locked state with the pressing head 110 at the lower position, the thin wall part 152 of the anti-overflow component 150 is in sealing contact with the sealing plug 133 of the cylinder 130, and the product in the container is prevented from flowing into the inner space of the cylinder 130 through the balance air hole 131. In this way, the product in the container does not spill even if it encounters bumps or is laid across during transport.

Preferably, at least a portion of the overflow preventing member 150 is elastically deformable, and more particularly, a portion of the overflow preventing member 150 contacting the cylinder 130 is elastically deformable. For example, the thin wall portion 152 of the spill prevention member 150 is made of an elastically deformable material, such as one or more of a soft plastic, an elastomer, a rubber, and the like. Alternatively, the overflow preventing member 150 may be entirely made of an elastically deformable material.

After the pressing head 110 of the lotion pump 100 is opened to the upper standby state, when a user presses the pressing head 110 to pump the product in the container, a negative pressure is generated in the container, and under the action of the negative pressure, the thin wall portion 152 is separated from the contact with the sealing plug 133, allowing the external air a to flow into the inside of the container through the balance air hole 131. The path of the air a flowing into the interior of the container is schematically shown in fig. 1 b.

Preferably, a fixing mechanism is further provided between the cylinder 130 and the overflow preventing member 150 to ensure that the relative position between the cylinder 130 and the overflow preventing member 150 is fixed. In one embodiment, a first engaging portion 153 is formed on an inner circumferential surface of the overflow preventing member body 151 of the overflow preventing member 150, and a second engaging portion 134 matching the first engaging portion 153 is formed on a corresponding portion of an outer surface of the cylinder 130. The first engaging portion 153 is, for example, a convex ring extending along the circumferential direction of the anti-spill member body 151, and the second engaging portion 134 is a slot extending circumferentially on the outer surface of the cylinder 130, and the convex ring can be, for example, interference-fitted in the slot to realize the fixed connection of the anti-spill member 150 on the cylinder 130.

Preferred exemplary embodiments of the present invention are described above with reference to the accompanying drawings. Other modifications, particularly to the structure of spill guard member 150, may also be made by those skilled in the art based on the above disclosure.

For example, the thin wall portion 152 may not extend downward from the top of the overflow preventing member body 151 as shown in the drawing, but extend upward from the overflow preventing member body 151, and the thin wall portion 152 is directly attached to the balance air hole 131 of the cylinder 130 from the outside when mounted, which also performs the function of the check valve described above. In this case, the sealing plug 133 on the cylinder 130 may be omitted.

The overflow preventing member 150 may be a part separately manufactured from the cylinder 130 as shown in the drawing and then mounted on the cylinder 130, or the overflow preventing member 150 may be integrally molded on the cylinder 130 during the manufacturing of the cylinder 130.

The connection between the overflow preventing member 150 and the cylinder 130 may be in other structures, for example, the first engaging portion 153 may be a circumferential slot formed on the inner circumferential surface of the overflow preventing member body 151, and the second engaging portion 134 may be a convex ring on the outer surface of the cylinder 130. Alternatively, the first engaging portion 153 may be formed by a combination of a plurality of convex rings and slots, and the second engaging portion 134 may be formed by a combination of a plurality of convex rings and grooves matching the shape of the first engaging portion 153.

Alternatively, the overflow preventing member 150 may be directly molded on the cylinder 130 to achieve a fixed relative position between the overflow preventing member 150 and the cylinder 130.

The above modified structure is within the scope of the present invention.

Claims

1. An emulsion pump with an anti-overflow structure comprises a pressure head, a tooth socket, a cylinder and a piston rod, wherein the upper end of the piston rod is connected to the pressure head, a piston is arranged on the piston rod, the tooth socket is connected with the cylinder, the part of the piston rod, which comprises the piston, penetrates through an inner hole of the tooth socket and extends into the inner space of the cylinder, a balance air hole is arranged on the cylinder,

characterized in that the lotion pump further comprises an anti-overflow member mounted on the cylinder and forming a check valve for the balance air hole, the check valve allowing flow from the inner space of the cylinder through the balance air hole to the interior of a container in which the lotion pump is mounted, but preventing flow from the interior of the container to the inner space of the cylinder.

2. An emulsion pump as recited in claim 1, wherein said anti-spill member comprises: the anti-overflow component body is sleeved on the outer surface of the cylinder; and a thin-walled portion extending from the spill prevention member body, the thin-walled portion being in sealing contact with the cylinder when the spill prevention member is mounted to the cylinder.

3. The emulsion pump of claim 2, wherein the cylinder includes a sealing plug extending downward from a cylinder flange of the cylinder, and the thin wall portion is in sealing contact with an inner circumferential surface and/or a lower end surface of the sealing plug.

4. An emulsion pump as set forth in claim 2, wherein said thin wall portion is adhered to said balance air hole from the outside when said anti-spill member is mounted to said cylinder.

5. An emulsion pump as claimed in claim 2, wherein a first engaging portion is formed on an inner surface of the spill prevention member, and a second engaging portion is formed on an outer surface of the cylinder, the first engaging portion being engageable with the second engaging portion.

6. The emulsion pump of claim 5, wherein one of the first and second snap-fit portions comprises at least one circumferentially extending raised ring formed on an inner surface of the anti-spill member body, and the other of the first and second snap-fit portions comprises at least one slot that mates with the at least one raised ring.

7. The emulsion pump of claim 1, wherein at least a portion of the anti-spill member that contacts the cylinder is elastically deformable.