CN107628355B

CN107628355B - Emulsion pump with water inlet prevention mechanism

Info

Publication number: CN107628355B
Application number: CN201610571238.9A
Authority: CN
Inventors: 丁要武
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-07-19
Filing date: 2016-07-19
Publication date: 2023-05-26
Anticipated expiration: 2036-07-19
Also published as: CN107628355A

Abstract

An emulsion pump has a ram, a tooth socket, a cylinder head, a cylinder and other parts, wherein a first sleeve is formed on the ram and comprises a first sealing structure; a second sleeve is formed on the mouthpiece or the cylinder head, and a second sealing structure corresponding to the first seal is formed on the second sleeve. The first seal structure is in contact with the second seal structure to form a seal when the emulsion pump is in a locked state or in a ready-to-use state, and the first seal structure and the second seal structure are out of contact when the emulsion pump is in a depressing process or a rebounding process. The emulsion pump can ensure that the emulsion pump can effectively prevent water from entering when the emulsion pump is in a locked or to-be-used state, and the emulsion pump is vertical or horizontal or even falls into bath water at the moment.

Description

Emulsion pump with water inlet prevention mechanism

Technical Field

The present invention relates to an emulsion pump, in particular for dispensing products, having a water-ingress-preventing mechanism.

Background

Emulsion pumps are widely used in daily chemical products such as shampoos, body washes, etc. for dispensing said products outwardly from the container in which they are contained. In order to compensate for the negative pressure generated during pumping of the product in the container by the emulsion pump, a balancing air hole is provided in the emulsion pump. During a shower, shower water may leak from these balance air holes into the emulsion pump and into the container, and the leaked water may cause corrosion to components in the emulsion pump, such as springs in the emulsion pump, and the like, and may also cause pollution to products in the container.

To overcome this problem, some emulsion pumps have been provided with a water ingress prevention design to prevent shower water from entering the container during the shower process. However, in the emulsion pumps with water-proof mechanisms available on the market at present, the design of the water-proof mechanism is premised on the emulsion pump being always vertically placed. In other words, once the emulsion pump is placed sideways, inverted, and even dropped into the water, the water still leaks into the emulsion pump and into the container.

Thus, there remains a need for an emulsion pump that effectively prevents water from leaking into the emulsion pump and into the container during a shower, regardless of the orientation.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object thereof is to provide an emulsion pump capable of preventing water from entering not only in a vertical orientation but also in other orientations even when placed in water.

The emulsion pump of the present invention has a head, a socket, a cylinder head and a cylinder, and further comprises:

a first sleeve formed on the ram and provided with a first sealing structure thereon; and

a second sleeve formed on the socket or the cylinder head, and having a second sealing structure formed thereon corresponding to the first sealing structure;

wherein when the emulsion pump is in a locked state or in a state to be used, the first sealing structure is in contact with the second sealing structure, a seal is formed between the first sleeve and the second sleeve, and when the emulsion pump is in a pressing-down process or a rebound process, the first sealing structure and the second sealing structure are out of contact, and a gap allowing fluid to pass is formed between the first sleeve and the second sleeve.

By providing the first and second sleeves with the first and second sealing structures, respectively, the emulsion pump of the present invention can prevent water from flowing into the emulsion pump when in a locked state or in a state to be used, and thus, the emulsion pump can effectively prevent water from entering the emulsion pump whether in a vertical position or horizontally placed or even placed in water. The gap between the first and second sleeves in turn allows for compensation of negative pressure generated during pumping of the product during use, for example during depression of the emulsion pump or during rebound thereof.

In one arrangement, the first sleeve is sleeved outside the second sleeve, the first seal is disposed on an inner surface of the first sleeve, and the second seal is disposed on an outer surface of the second sleeve. Of course, the second sleeve may be disposed outside the first sleeve, and the first and second sealing structures are correspondingly disposed in opposite directions.

Further, for the emulsion pump of the lower locking type, the first sealing structure includes a first annular projection provided at a lower portion of the first sleeve and a second annular projection provided at an upper portion of the first sleeve, and the second sealing structure includes a third annular projection provided at an upper portion of the second sleeve; alternatively, the first sealing structure includes a first annular protrusion disposed at a lower portion of the second sleeve and a second annular protrusion disposed at an upper portion of the second sleeve, and the second sealing structure includes a third annular protrusion disposed at a lower portion of the first sleeve; in this structure, the third annular projection is fitted with the first annular projection when the emulsion pump is in the locked state, and the third annular projection is fitted with the second annular projection when the emulsion pump is in the state to be used.

Alternatively, for the upper locking type emulsion pump, the first sealing structure includes at least one of a first annular protrusion and a second annular protrusion provided at a lower portion of the first sleeve, and the second sealing structure includes a third annular protrusion provided at an upper portion of the second sleeve; wherein the third annular projection cooperates with the first annular projection and/or the second annular projection when the emulsion pump is in a locked state or in a ready-to-use state.

In the present invention, the first sleeve may be integrally formed on the ram or may be separately formed and connected to the ram. Similarly, the second sleeve may be integrally formed on the mouthpiece or cylinder head, or may be separately formed and attached to the mouthpiece or cylinder head.

The present invention is applicable to an emulsion pump of the type in which a cylinder head is integrally formed on a dental socket, in which structure a second sleeve is formed on the integrally formed cylinder head and dental socket.

Alternatively, the present invention may be applied to an emulsion pump of a type in which a cylinder head and a dental floss are each formed separately, in which case the second sleeve may alternatively be formed on the cylinder head or on the dental floss.

Drawings

Fig. 1 is a longitudinal sectional view of the emulsion pump of the present invention, wherein the emulsion pump is in a stand-by state or an upper lock state.

Fig. 1a is a partial enlarged view of part I of fig. 1.

Fig. 2 is another longitudinal sectional view of the emulsion pump of the present invention, wherein the emulsion pump is in a lower lock state.

Fig. 2a is a partial enlarged view of part II of fig. 2.

Fig. 3 is a further longitudinal section of the emulsion pump of the present invention wherein the emulsion pump is in the process of depressing or rebounding.

Fig. 3a is an enlarged partial view of part III of fig. 3.

Fig. 4 is a longitudinal cross-sectional view of a first sleeve on the head of the emulsion pump of the present invention.

Fig. 5a is a longitudinal sectional view of a mouthpiece of the emulsion pump of the present invention, on which a second sleeve is integrally formed.

Fig. 5b is a perspective view of the mouthpiece shown in fig. 5 a.

Fig. 6a is a longitudinal cross-sectional view of another embodiment of the ram of the emulsion pump of the present invention, wherein a first sleeve is integrally formed on the ram.

Fig. 6b is a perspective view of the ram of fig. 6 a.

Detailed Description

Specific embodiments of the present invention will be described in detail below with reference to fig. 1 to 5. It should be understood that the drawings are only illustrative of the preferred embodiments of the invention and are not intended to limit the scope of the invention. Various obvious modifications, variations, equivalent substitutions of the present invention on the basis of the preferred embodiments shown in the drawings may be made by those skilled in the art, and the technical features in the different embodiments described below may be combined arbitrarily without contradiction, all of which fall within the scope of the present invention.

Fig. 1 and 2 show longitudinal sectional views of an emulsion pump 1 according to the invention in the upper and lower end-of-travel position, respectively. The upper stroke dead center position shown in fig. 1 may be an upper lock position of the emulsion pump 1, or a position where the emulsion pump 1 has been unlocked to be used. The bottom dead center position shown in fig. 2 may be a lower lock position of the emulsion pump 1.

The emulsion pump 1 shown in fig. 1 and 2 comprises a ram 10, a mouthpiece 20 and a cylinder 30, wherein the ram 10 and the mouthpiece 20 are relatively movably matched together, and the cylinder 30 is fixedly connected with the mouthpiece 20 by a mode such as screw connection, clamping connection and the like. At the lower end of the ram 10, a piston rod 40 is connected, the piston rod 40 extends into the cylinder 30, and at the lower end of the piston rod 40, a piston 50 is provided, at least a portion of the outer wall of the piston 50 being interference fit with the inner surface of the cylinder 30 to form a seal. A spring 60 is also provided in the emulsion pump 1, the spring 60 exerting an upward biasing force on the ram 10 so that when no downward pressure is exerted on the ram 10, the ram 10 remains at its upper end of travel, thus being in a standby state, or in an upper lock state (for an emulsion pump 1 of the upper lock type), whereas when a consumer exerts a downward pressure on the ram 10, the ram 10 will move downward against the biasing force of the spring 60, thereby pumping out the product stored in the cylinder 30.

As shown in fig. 1 and 2, in the present invention, a first sleeve 11 is provided at a lower portion of a ram 10. The first sleeve 11 may be integrally formed with the ram 10 or may be formed separately and then attached to the lower portion of the ram 10 by means known in the art, such as by screwing, snap fitting, welding, etc. Fig. 4 shows the first sleeve 11 formed separately, while fig. 6a and 6b show the first sleeve 11 formed integrally with the ram 10.

A second sleeve 21 is provided on the mouthpiece 20, which second sleeve 21 may likewise be integrally formed on the mouthpiece 20 or may be separately formed and then attached to the mouthpiece 20 in a known manner. Fig. 5a and 5b show the case where the second sleeve 21 is integrally formed on the mouthpiece 20. As for the case where the second sleeve 21 is formed separately, reference is made to what has been described above with respect to the separate forming of the first sleeve 11.

The first sleeve 11 and the second sleeve 21 are slidably engaged with each other and are arranged to form a seal between the first sleeve 11 and the second sleeve 21 when the ram 10 is in the lower lock condition (fig. 2), or in the upper lock condition or standby condition (fig. 1), and a gap exists between the first sleeve 11 and the second sleeve 21 when the ram 10 is depressed or rebounded.

In the preferred structure of the emulsion pump 1 shown in the drawings, the first sleeve 11 is fitted over the outside of the second sleeve 21, and a plurality of annular projections are formed on the inner surface of the first sleeve 11 and the outer surface of the second sleeve 21, respectively. When the annular projection on the inner surface of the first sleeve 11 and the annular projection on the outer surface of the second sleeve 21 are in contact with each other, a seal is formed between the first sleeve 11 and the second sleeve 21.

Fig. 4 and 5a, 5b show the emulsion pump 1 locked in the lower position by way of example the structure of the first sleeve 11 and the second sleeve 21 integrally formed on the mouthpiece 20. As shown in fig. 4, two annular projections, namely, a first annular projection 12 and a second annular projection 13 are formed on the inner surface of the first sleeve 11, the first annular projection 12 being located at the lower portion of the first sleeve 11, and the second annular projection 13 being located at the upper portion of the first sleeve 11.

Correspondingly, as shown in fig. 5a and 5b, a third annular protrusion 22 is formed on the outer side of the upper portion of the second sleeve 21 of the mouthpiece 20.

When the ram 10 is in the lower lock condition, the third annular projection 22 is in interference fit with the second annular projection 13 on the upper portion of the first sleeve 11, thereby forming a seal between the first sleeve 11 and the second sleeve 21, as shown in fig. 2 and the partial enlarged view of fig. 2 a.

When the locked state of the emulsion pump 1 is released, so that the ram 10 moves up to the top dead center of its stroke, the third annular projection 22 is interference fitted with the first annular projection 12 of the lower portion of the first sleeve 11, forming a seal between the first sleeve 11 and the second sleeve 21, as shown in the partial enlarged views of fig. 1 and 1 a.

And when the consumer presses the ram 10 to move the ram downward for use of the product, or removes the pressure after the ram is depressed to rebound the ram 10 upward, the third annular projection 22 is not in contact with either the first annular projection 12 or the second annular projection 13, thereby forming a gap (as shown in fig. 3 and 3 a) between the first sleeve 11 and the second sleeve 21 that allows Xu Waijie air to flow into the emulsion pump 1 and into a container (not shown) during use to compensate for the negative pressure created in the container by the product being pumped out.

Preferably, the first sleeve 11 and the second sleeve 21 described above are formed in a thin-walled structure, thereby imparting a certain flexibility to the first sleeve 11 and the second sleeve 21, thereby facilitating an interference fit between the third annular projection 22 and the first annular projection 12 and the second annular projection 13, and facilitating a resetting of the first sleeve 11 and the second sleeve 21 when the third annular projection 22 is out of contact with the first annular projection 12 and the second annular projection 13. Alternatively or additionally, the first sleeve 11 and the second sleeve 21 may be formed of an elastic material to impart an interference fit to the first sleeve 11 and the second sleeve 21 and the ability to return after being out of contact.

One specific embodiment of the emulsion pump 1 of the present invention is described above. Modifications of the above-described structure may be made by those skilled in the art, depending on the particular needs, and still fall within the scope of the invention.

For example, in the structure of the emulsion pump 1 described above with reference to the drawings, the cylinder head and the dental mouthpiece 20 are integrally formed together. Those skilled in the art will appreciate that structures in which the cylinder head and the dental floss 20 are each independently formed and assembled together are also common in the field of emulsion pumps. At this time, the second sleeve 21 may be formed on a cylinder head (not separately shown in the drawings) which is in turn connected to the socket 20.

The above-described structure is exemplified by a below-lock type emulsion pump. With the above-lock type emulsion pump, since both the lock position and the position to be used are at or near the stroke top dead center of the ram 10, the first annular projection 12 and the second annular projection 13 on the first sleeve 11 are formed at the lower portion of the first sleeve 11, and even the first annular projection 12 and the second annular projection 13 may be connected together to form a single annular projection. That is, in the upper locking type emulsion pump, the first sleeve 11 may include at least only one annular protrusion formed at a lower portion thereof.

In another structure, only one annular protrusion may be formed in the first sleeve 11 at the lower portion, and one annular protrusion may be formed at the upper and lower portions of the second sleeve 21, respectively. In this way, a seal is likewise formed between the first sleeve 11 and the first annular projection 12 when the ram 10 reaches its top dead center of travel and bottom dead center of travel.

Further, the second sleeve 21 may be sleeved on the outer side of the first sleeve 11, so that annular protrusions are formed on the inner surface of the second sleeve 21 and the outer surface of the first sleeve 11, respectively.

Claims

1. An emulsion pump having a ram, a tooth socket, a cylinder head, and a cylinder, the emulsion pump further comprising:

a first sleeve formed on the press head and provided with a first sealing structure; and

a second sleeve formed on the socket or the cylinder head, and having a second sealing structure corresponding to the first seal formed thereon;

wherein when the emulsion pump is in a locked state or in a state to be used, the first sealing structure is in contact with the second sealing structure and is in interference fit, so that a seal is formed between the first sleeve and the second sleeve, and when the emulsion pump is in a pressing-down process or a rebound process, the first sealing structure and the second sealing structure are out of contact, and a gap allowing fluid to pass is formed between the first sleeve and the second sleeve;

the first sleeve is sleeved on the outer side of the second sleeve, the first sealing structure is arranged on the inner surface of the first sleeve, the second sealing structure is arranged on the outer surface of the second sleeve,

when the emulsion pump is of a lower locking type, the first sealing structure comprises a first annular protrusion arranged at the lower part of the first sleeve and a second annular protrusion arranged at the upper part of the first sleeve, and the second sealing structure comprises a third annular protrusion arranged at the upper part of the second sleeve, wherein when the emulsion pump is in the locking state, the third annular protrusion is in interference fit with the first annular protrusion, and when the emulsion pump is in the state to be used, the third annular protrusion is in interference fit with the second annular protrusion; or alternatively

When the emulsion pump is of an upper locking type, the first sealing structure comprises at least one of a first annular protrusion and a second annular protrusion arranged at the lower part of the first sleeve, and the second sealing structure comprises a third annular protrusion arranged at the upper part of the second sleeve, wherein when the emulsion pump is in the locking state or in the state to be used, the third annular protrusion is matched with the first annular protrusion and/or the second annular protrusion.

2. The emulsion pump of claim 1, wherein the first sleeve is integrally formed on the compression head and/or the second sleeve is integrally formed on the mouthpiece or the cylinder head.

3. The emulsion pump of claim 1 wherein said first sleeve is formed separately and attached to said ram and/or said second sleeve is formed separately and attached to said mouthpiece or said cylinder head.

4. The emulsion pump of claim 1 wherein said cylinder head is integrally formed on said mouthpiece and said second sleeve is integrally formed on said cylinder head and said mouthpiece.

5. The emulsion pump of claim 1 wherein said cylinder head and said mouthpiece are each separately formed, said second sleeve being formed on said cylinder head or said mouthpiece.