CN217477972U - Pumping device - Google Patents

Abstract

The pumping device comprises a pressure head and a tooth socket, wherein the pressure head is connected with the tooth socket, the pumping device further comprises a foldable bag body, the foldable bag body is formed by connecting a plurality of sections, an included angle is formed between every two adjacent sections, and at least two adjacent sections are connected with each other through a weak part. The pumping device of this construction allows for folding of the collapsible bladder with less compressive force and the collapsible bladder is easily repositioned when the compressive force is removed.

Description

Pumping device

Technical Field

The present invention relates to a pumping device for pumping a product in fluid or semi-fluid form from a container, and in particular to an all-plastic pump.

Background

Pumping devices such as push pumps are widely used in the field of household cleaning products, skin care products, food products, medicines, etc. to pump out a product contained in a container for use.

Typically, the pumping device is provided with a resilient return means, such as a metal spring, so that after the pumping device is pressed to pump the product, the pumping device can be returned to be ready for the next pumping. With the increase of environmental protection requirements of related regulations, bag type all-plastic pumps appear in the market. In the all-plastic bag pump, the compressible bag body is used to replace the original metal spring, and the elastic force generated by the compressed bag body is used to reset the pumping device. The bag type all-plastic pump realizes the full plasticization of the pressing pump, so that the pressing pump can be easily recovered and regenerated for recycling.

In the application process, the common problems of the existing bag type all-plastic pump are that the pressing hand feeling is heavy, the rebound resetting performance is not ideal, and the condition that the product in the container cannot be normally reset for use without being used up and the pressing pump is easy to occur. The applicant found through research that the main reason for this problem is that the capsule has a low compression force conversion rate due to its structure, only a small part of the compression force is converted into a resilience force of the capsule in the vertical direction, and the rest of the compression force is converted into a radial dragging force when the capsule is folded.

Accordingly, there is a need for further improvements in bladder-type, all-plastic pumps that overcome the above-mentioned problems associated with prior bladder-type, all-plastic pumps.

SUMMERY OF THE UTILITY MODEL

The present invention is made to solve the above-mentioned problems of the prior art. The utility model aims at providing a pumping installations of institutional advancement specifically is a capsule type presses force pump, and it can reduce to press the utricule so that it folds required pressing force, can change this pressing force into ascending resilience force high-efficiently. Further, the pumping device may also have good resilience properties.

The pumping device comprises a pressure head and a tooth socket, wherein the pressure head is connected with the tooth socket, the pumping device further comprises a foldable bag body, the foldable bag body is formed by connecting a plurality of sections, an included angle is formed between every two adjacent sections, the foldable bag body is arranged, when pressing force is directly or indirectly applied to the foldable bag body, the adjacent foldable bag bodies are folded, when the pressing force is removed, the foldable bag bodies are stretched, and at least two adjacent sections are connected with each other through a weak portion.

By providing a weakened portion at the portion connecting between the two segments, less compression force is required when pressing the collapsible bladder to collapse it, and the loss of compression force due to radial traction forces is reduced or avoided, so that the collapsible bladder is easier to reposition when the compression force is removed.

In a preferred construction, the collapsible bladder is located in a space defined by the ram cooperating with the mouthpiece. At this time, the upper end of the foldable capsule body is supported on the pressure head, the lower end of the foldable capsule body is supported on the tooth socket, and the pressure head is connected to the tooth socket in a relatively movable manner, so that the foldable capsule body can be folded by pressing the pressure head.

In an alternative configuration, the collapsible bladder is formed on top of a pressure head that is fixedly attached to the mouthpiece and can be collapsed by applying a compressive force directly on the collapsible bladder.

Preferably, the weak portion may be formed in at least one of the following structures:

an outer cutting portion opening toward an outer side of the included angle;

an inner notch portion opening toward an inner side of the included angle; and

a thin-walled portion.

Preferably, the bladder-type pressing pump may further include:

an upper one-way valve formed between the inner space of the capsule body and the outlet of the pressure head; and/or

A lower one-way valve formed between the inner space of the capsule and the container.

Wherein, the upper one-way valve is formed by mutually matching a flange at the upper part of the foldable capsule body and an inner sleeve of the pressure head; and the lower one-way valve may include a valve flap formed on a lower portion of the collapsible bladder that mates with a valve seat formed in the mouthpiece. Of course, the upper and lower check valves may take other forms. For example, the lower check valve may be a ball check valve, wherein the ball seats in a seat formed on the mouthpiece.

The collapsible bladder may take on a variety of suitable shapes. For example, the collapsible bladder may have a longitudinal cross-section in one of a trapezoidal and cylindrical shape, and a cross-section in one of a circular, rectangular, and polygonal shape.

Preferably, the collapsible bladder is formed as a spiral. This spiral shape of the collapsible bladder facilitates rotational demolding during the manufacturing of the collapsible bladder.

Preferably, the collapsible bladder is arranged such that when said collapsible bladder is depressed, said segments do not deform and only said weaknesses between adjacent two of said segments deform. In this way, as little pressing force as possible is lost due to inelastic deformation of the collapsible bladder, thereby improving the efficiency of converting the pressing force into the resilient force.

The collapsible bladder may return to its original shape by its own resilience. Alternatively, the resilient force generated during compression of the collapsible bladder may be less than the force required to reposition it, and even the collapsible bladder may not have the ability to generate a resilient force by itself. In this case, an elastic restoring mechanism may be additionally provided in the inner space of the foldable capsule, an upper end of the elastic restoring mechanism being supported on the pressure head or the top of the foldable capsule, and a lower end of the elastic restoring mechanism being supported on one of the mouthpiece, the pressure head, and the lower portion of the foldable capsule.

For example, the upper end of the elastic reset mechanism is supported on the pressure head, and the lower end of the elastic reset mechanism is supported on the tooth socket; or the upper end is supported on the pressure head, and the lower end is supported on the lower part of the foldable bag body; or with the upper end supported on top of the collapsible bladder and the lower end supported on one of the indenter, mouthpiece or lower portion of the collapsible body, etc.

Preferably, the resilient return mechanism comprises at least one arcuate resilient strip. The resilient strip may be made of plastic.

Of course, the resilient return mechanism may take other forms. For example, the shape of the resilient return means may also be spiral, web, S-shaped, prismatic, combinations thereof, and the like. Furthermore, the elastic return mechanism can also be provided in the form of various springs, such as compression springs, tension springs, leaf springs, etc.

Drawings

The embodiments of the invention will become more apparent from the structure illustrated in the accompanying drawings, in which:

fig. 1 shows a sectional view of a bladder type pressing pump of a first embodiment of the present invention, which is located at its upper standby position.

Fig. 2 shows another sectional view of the bladder pressing pump of fig. 1, wherein the bladder pressing pump is in its lowered pressing position.

FIG. 3a illustrates a cross-sectional view of one exemplary construction of a collapsible bladder body of the bladder pump of FIG. 1.

Fig. 3b is an enlarged view of a portion a in fig. 3 a.

FIG. 4a illustrates a cross-sectional view of another exemplary configuration of a collapsible bladder body of the bladder pump of FIG. 1.

Fig. 4B is an enlarged view of a portion B in fig. 4 a.

FIG. 5a illustrates a cross-sectional view of yet another exemplary configuration of a collapsible bladder body of the bladder pump of FIG. 1.

Fig. 5b is an enlarged view of a portion C in fig. 5 a.

Figure 6 is a side view of a collapsible bladder in a modified configuration.

Figure 7 is a side view of another alternative configuration of a collapsible bladder.

Fig. 8 is a perspective view of a foldable bladder in yet another alternate configuration.

Fig. 9 is a sectional view of a bladder type pressing pump according to a second embodiment of the present invention.

Fig. 10 is an enlarged view of a portion D of fig. 9.

Detailed Description

To facilitate understanding of the present invention, the following detailed description of the embodiments of the pumping device of the present invention will be made with reference to the accompanying drawings. It is understood that the drawings depict only preferred embodiments of the invention and are not intended to limit the scope of the invention. Various obvious modifications, variations and equivalents of the present invention can be made by those skilled in the art on the basis of the embodiments shown in the drawings, and the technical features in the different embodiments described below can be arbitrarily combined with each other without contradiction, and these are within the scope of the present invention.

In the following detailed description of the present invention, the terms used to indicate directions and orientations such as "up" and "down" are based on the general orientation of the pumping device in use as shown in the drawings, and it is understood that the orientation of the pump may be changed in such situations as transportation, storage, etc.

< first embodiment >

Fig. 1 to 8 show a first embodiment of the pumping device of the present invention and a modified structure thereof. The pumping device is specifically a bladder push pump 100.

Fig. 1 and 2 show a sectional view of a bladder type pressing pump 100 of a first embodiment, in which fig. 1 shows the bladder type pressing pump 100 at a stroke top dead center position, and fig. 2 shows the bladder type pressing pump 100 being depressed at a stroke bottom dead center position thereof.

The bladder-type compression pump 100 includes an indenter 110 and a mouthpiece 120, and the indenter 110 and the mouthpiece 120 cooperate with each other to form an accommodating space in which a foldable bladder 130 is accommodated. The upper end of the collapsible bladder 130 is fitted to the top of the ram 110, for example, fixed to the top of the ram 110. At the upper end of the foldable bladder 130 is provided a flange 135 (as seen more clearly in fig. 3 a). An inner sleeve 111 is formed to hang downwardly at the top of the ram 110. The flange 135 of the collapsible bladder 130 cooperates with the inner sleeve 111 of the ram 110 to form an upper one-way valve 151. The upper check valve 151 is disposed between the inner space of the foldable capsule 130 and the pressure nozzle 112 of the pressure head 110, and is configured to allow the product contained inside the foldable capsule 130 to flow out, but prevent external air or foreign substances, etc. from flowing into the foldable capsule 130.

The lower end of collapsible bladder 130 is supported on mouthpiece 120. And, a valve sheet is integrally provided at a lower end of the foldable capsule 130, thereby forming a lower check valve 152. Correspondingly, a valve seat 121 matched with the valve plate is formed on the foldable capsule 130. The lower one-way valve 152 is provided to allow product inside a container (not shown) in which the bladder pump 100 is installed to enter the space inside the foldable bladder 130 through the suction tube 160, but to prevent the product contained in the foldable bladder 130 from flowing back into the container.

In a preferred construction, as best shown in fig. 1 and 2, a resilient return mechanism 140 is provided within the interior of collapsible bladder 130. The upper end of the resilient return mechanism 140 is supported below the top of the ram 110 and the lower end of the resilient return mechanism 140 is supported at the lower end of the collapsible bladder 130 or on the mouthpiece 120.

Further, the upper end of the elastic restoring mechanism 140 may be fixedly connected to the pressing head 110, or may be detachably supported on the pressing head 110. Similarly, the lower end of the resilient return 140 may be fixedly attached to the collapsible bladder 130 or mouthpiece 120 or may be removably supported.

The preferred configuration of the resilient return mechanism 140 is at least one resilient strip, preferably two or more resilient strips, in the form of an arch. The resilient strip may be made of plastic.

Fig. 3a illustrates an exemplary structure of a foldable bladder 130 in the bladder-type push pump 100, and fig. 3b illustrates an enlarged view of a portion a of fig. 3 a. As already mentioned before, the upper end of the collapsible bladder 130 is formed with a flange 135 which cooperates with the inner sleeve 111 of the ram 110 to form an upper one-way valve 151, and the lower end of the collapsible bladder 130 is integrally formed with a lower one-way valve 152 in the form of a valve flap.

The body of the foldable bladder 130 is formed by a plurality of segments 131 connected to form an angle α between two adjacent segments 131, as can be seen in the figures, the angle α is typically less than 180 degrees. The segments 131 may be straight, as schematically shown in the figures. Alternatively, the straight section 131 may be slightly curved. And, a weak portion is formed between the adjacent two segments 131. As can be seen more clearly in fig. 3b, in this exemplary configuration the weakness connecting between two adjacent segments 131 is in the form of an internal cut 132. Here, the "inner notch portion" means that the notch portion is formed to open to the inside of the included angle α formed by the adjacent segments 131. For example, the inner incision portion 132 may be a V-shaped incision.

Preferably, each segment 131 of the foldable bladder 130 may be made of a relatively rigid material, so that when the foldable bladder 130 is pressed, the segment 131 itself is not deformed or is rarely deformed, and only the inner cut portion 132 between two adjacent segments 131 is deformed. Thus, the loss of the pressing force can be reduced as much as possible, and the efficiency of converting the pressing force into the repulsive force can be improved.

Also, in the construction of foldable bladder 130 shown in the figures, it is preferred that when foldable bladder 130 is depressed, the bisector of the angle α between adjacent segments 131 remains substantially horizontal, and segments 131 pivot about the bisector. Thereby ensuring that the collapsible bladder 130 collapses and expands in the vertical direction as shown in the figures.

Thus, the structure of the present application may have a directional folding effect. The effect of this directional folding is achieved primarily by the weakened portions, such as the inner notch portion 132.

The weakened portion of collapsible bladder 130 may take other forms in addition to the configuration shown in fig. 3a and 3 b. For example, in the arrangement shown in figures 4a and 4b, the weaknesses formed between two adjacent segments 131 are in the form of circumscribed openings 133. Here, the so-called "outer cut portion" means that the cut portion is formed to open toward the outside of the included angle α formed by the adjacent segments 131, as schematically shown in fig. 4 b.

As another example, in another alternative configuration shown in fig. 5a and 5b, the weakenings connecting between two adjacent segments 131 are designed in the form of thin-walled portions 134.

Preferably, as shown in the figures, a sealing sleeve 136 is formed at a lower portion of collapsible bladder 130, and sealing sleeve 136 cooperates with mouthpiece 120 to form a seal. As shown in fig. 1, balance air holes 122 are preferably formed on the mouthpiece 120. The sealing sleeve 136 closes the equalization air hole 122 (fig. 2) when the bladder press pump 100 is in the down lock position, such as during storage and transportation. When the bladder-type push pump 100 is in the use position, for example, the upper standby position shown in fig. 1, the balance air hole 122 is opened, so that external air can be sucked into the container through the balance air hole 122. In this way, a balance of air pressure inside and outside the container can be maintained after pumping the product from the container.

For the above-described construction of the foldable bladder 130, it can be made of any suitable plastic material, such as soft plastic or hard plastic. In the above-described configuration, foldable bladder 130 may generate a resilient force during compression. However, the collapsible bladder body 130 may be made of a plastic material that does not generate a resilient force or generates a low resilient force, and the bladder pump 100 will be substantially restored by the resilient force of the resilient restoring mechanism 140.

The collapsible bladder 130 may also be formed in a variety of ways known in the art, such as injection molding, blow molding, injection blow molding, air assist, and the like.

Figures 6-8 illustrate various configurations of collapsible bladder 130. Wherein, unlike the substantially cylindrical collapsible bladder 130 shown in fig. 3 a-5 b, the collapsible bladder 130 shown in fig. 6 has a substantially trapezoidal longitudinal cross-section.

The foldable bladder 130 shown in fig. 7 is spiral-shaped. The spiral shape of collapsible bladder 130 facilitates the manufacture of collapsible bladder 130, and in particular facilitates the spinning off of the mold during the manufacturing process.

The cross-section of collapsible bladder 130 may also take on a variety of suitable shapes, such as a circle, or a square cross-section as shown in fig. 8, or may also be rectangular, polygonal, etc.

The resilient return mechanism 140 may be made of a suitable plastic material and may take on various shapes, such as arcuate, spiral, web, S-shaped, prismatic, combinations thereof, and the like, as desired.

Furthermore, the elastic return mechanism 140 may be provided in various spring forms, such as a compression spring, a tension spring, a leaf spring, and the like.

The operation principle of the bladder type pressing pump 100 described above will be explained.

In use, a user presses downward on the ram 110, thereby simultaneously pressing downward on the collapsible bladder 130 and the resilient return mechanism 140. At this time, the foldable bladder 130 is folded downward, the included angle α between the adjacent segments 131 becomes smaller, the available space in the foldable bladder 130 becomes smaller, and thus the pressure inside the foldable bladder 130 rises, the upper check valve 151 is opened, and the product is pumped out. Also, during the pressing down, a resilient force is accumulated in the foldable bladder 130 and the elastic restoring mechanism 140.

When the user removes the pressure applied to the indenter 110, the foldable bladder 130 and the elastic return mechanism 140 return upward under the resilient force thereof, during which the foldable bladder 130 is stretched upward, wherein the angle α between two adjacent segments 131 becomes larger. As a result, the space available in collapsible bladder 130 increases, causing a drop in pressure inside collapsible bladder 130, which causes lower one-way valve 152 to open, such that the product in the container flows into the interior space of collapsible bladder 130 for the next compression use.

In the above-described structure of the bladder-type push pump 100, the foldable bladder body 130 can be easily folded and stretched by forming the weak portion between the adjacent two segments 131. This reduces the compressive force required to collapse collapsible bladder 130 during the downward application of compressive force.

< second embodiment >

Fig. 9 and 10 show a bladder type pressing pump 200 according to a second embodiment of the present invention. The specific structure described above with respect to the first embodiment also applies to the second embodiment without a contrary description or conflict. The structure of the second embodiment different from the first embodiment will be mainly described below.

As shown in fig. 9, the bladder type pressing pump 200 includes a pressing head 210 and a mouthpiece 220, and the pressing head 210 is coupled to the mouthpiece 220. Unlike the first embodiment in which the ram 210 is fixedly coupled to the mouthpiece 220, the ram 110 is movable in an up-and-down direction relative to the mouthpiece 120 in the first embodiment.

A collapsible bladder 230 is provided on top of the ram 210. The collapsible bladder 230 may be fixedly attached to the ram 210, for example, the collapsible bladder 230 may be integrally formed on the ram 210, or the collapsible bladder 230 may be separately formed and then fixedly attached to the ram 210 by methods known in the art, such as heat welding.

A resilient return mechanism 240 is housed in the collapsible bladder 230. The upper end of the elastic restoring mechanism 240 is supported on the top of the foldable bladder 230, and the lower end of the elastic restoring mechanism 240 is supported on the mouthpiece 220. Alternatively, the lower end of the resilient return 240 may be supported on the ram 210 or on the lower portion of the collapsible bladder 230, all within the scope of the present application.

An upper one-way valve 251 is formed between the interior space of the collapsible bladder 230 and the press nozzle 211 of the press head 210 to allow product within the collapsible bladder 230 to be dispensed out through the press nozzle 211 but prevent product from flowing back into the collapsible bladder 230. The upper one-way valve 251 may be in the form of a flexible flange, similar to the first embodiment.

Fig. 10 shows an enlarged view of a portion D of fig. 9, in which a partial structure of the foldable balloon 230 is shown. The foldable bladder 230 comprises a plurality of interconnected segments 231, with two adjacent segments 231 being connected together by a weakened portion 232, which weakened portion 232 may be a notch or a thin wall as in the first embodiment. In this way, the collapsible bladder 230 is easily deformed, such that the amount of force required to collapse and expand the collapsible bladder 230 is relatively small.

A lower one-way valve 252 is provided in the mouthpiece 220, the lower one-way valve 252 being in the form of a valve ball. Of course, the lower check valve 252 may also take the form of a valve plate as the lower check valve 152 in the first embodiment.

During use, an operator applies a pressing force directly on top of the collapsible bladder 230, causing the collapsible bladder 230 to fold downward and the resilient return mechanism 240 to buckle. When the compression force is removed, the resilience of the resilient return mechanism 240 causes the collapsible bladder 230 to return to its pre-compressed state. Of course, the foldable bladder 230 itself may also have some resilience to return to an uncompressed state.

Claims (11)

1. A pumping device for pumping a product from a container, the pumping device comprising a pressure head and a mouthpiece, the pressure head being connected to the mouthpiece,

the pumping device further comprises a foldable balloon formed by connecting a plurality of segments, and an included angle is formed between two adjacent segments, the foldable balloon being configured such that when a compressive force is applied directly or indirectly to the foldable balloon, adjacent ones of the foldable balloons are folded, and when the compressive force is removed, the foldable balloons are stretched, wherein at least two adjacent segments are connected to each other by a weak portion;

the weak portion is formed in at least one of the following structures:

a peripheral cut portion opening toward an outer side of the included angle;

an inner notch portion opening toward an inner side of the included angle; and

a thin-walled portion.

2. The pumping apparatus as set forth in claim 1, wherein an upper end of the collapsible bladder is supported by the pressure head and a lower end of the collapsible bladder is supported by the mouthpiece, the pressure head being relatively movably connected to the mouthpiece such that the collapsible bladder can be collapsed by pressing the pressure head.

3. The pumping apparatus as recited in claim 1 wherein said collapsible bladder is formed on top of said pressure head, said pressure head being fixedly attached to said mouthpiece and said collapsible bladder is collapsed by applying said compressive force directly to said collapsible bladder.

4. The pumping apparatus as set forth in claim 1, further comprising:

an upper one-way valve formed between the interior space of the bladder and the outlet of the head; and/or

A lower one-way valve formed between the interior space of the bladder and the reservoir.

5. A pumping apparatus as claimed in claim 4, wherein the upper one-way valve is formed by a flange on the upper portion of the collapsible bladder co-operating with an inner sleeve of the head;

the lower one-way valve comprises a valve plate formed at the lower part of the foldable bag body, and the valve plate is matched with a valve seat formed in the tooth socket.

6. The pumping apparatus of claim 1, wherein the collapsible bladder has one of a trapezoidal and cylindrical shape in longitudinal cross-section and one of a circular and polygonal shape in cross-section.

7. The pumping apparatus as defined in claim 1, wherein the collapsible bladder has a rectangular cross-section.

8. The pumping apparatus of claim 1, wherein the collapsible bladder is formed in a spiral shape.

9. The pumping apparatus as set forth in claim 1, wherein the collapsible bladder is configured such that when the collapsible bladder is depressed, the segments do not deform and only the weaknesses between adjacent two of the segments deform.

10. A pumping device as claimed in any one of claims 1 to 9, wherein an elastic return mechanism is provided in the interior space of the collapsible bladder, the upper end of the elastic return mechanism being supported on the head or the top of the collapsible bladder and the lower end of the elastic return mechanism being supported on one of the mouthpiece, the head and the lower portion of the collapsible bladder.

11. The pumping apparatus as defined in claim 10, wherein the resilient return mechanism comprises at least one arcuate resilient strip.

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