KR20090000906A - Small hand-operated pump - Google Patents

Abstract

A miniature manual pump is provided to simplify an assembling process of the pump and decrease a manufacturing cost by comprising a structure of using a little bit parts and easily being manufactured, to prevent foreign materials from being flown in from an outside and to supply a closure force and a high pumping force by using opening and closing members having a projection structure. A miniature manual pump contains a button which is mounted on an upper end of a shaft and has an outlet, a housing of a hollow structure, a closure which is connected at an outer surface of an upper part of the housing and mounts the housing to a container, a housing cap which is mounted on an opening of a top portion of the housing, guides up and down motion of the shaft and seals an internal space of the housing from outside, a shaft which is connected to a bottom part of the button and moves up and down along an inner surface of the housing cap to a state connected in the outer surface of a stem, the stem including a bottom extension part in which an indentation groove in which an upper end of a compressed spring is inserted is formed in a bottom part, a piston which opens and closes a perpendicularity flow channel of the stem and moves up and down to a state that is mounted on a lower part of the shaft along an inner wall of the housing, the compressed spring which provides a force of restitution for the stem in pumping, is positioned between the indentation groove and the inlet port and an opening and closing members which are positioned in the bottom part of inner the housing, and open and close the inlet port of the housing in pumping.

Description

Small Hand-operated Pump {Small Hand-operated Pump}

1 is a vertical sectional view of a small hand pump according to one embodiment of the present invention;

FIG. 2 is a vertical sectional view under pressure mode of the pump of FIG. 1; FIG.

3 is a plan view, side view and bottom view of the opening and closing member constituting the pump of FIG. 1;

4 is a plan view, side view and bottom view of the stem constituting the pump of FIG. 1;

5 is a plan view, side views and a bottom view of the housing cap constituting the pump of FIG.

The present invention relates to a small hand pump that can be mounted and used in a shower article or a cosmetic container, and more particularly, a button having a discharge port, a housing constituting the exterior of the pump, a closure for mounting the housing in a container, and a housing. A housing cap for sealing, a shaft for vertical movement along the inner surface of the housing cap, a stem connected to the shaft and having a vertical flow path formed on a contact surface with the shaft, a piston for vertical movement, opening and closing a vertical flow path of the stem, A manual pump comprising a compression spring for providing a restoring force of the pump and an opening and closing member for opening and closing the housing lower inlet when pumping.

Due to its convenience, small hand pumps are widely used in shower or cosmetic containers for dispensing liquid or emulsion contents by a certain amount. In particular, the manual pump has been widely used due to the feature that the contents can be easily discharged by a certain amount while storing the contents in the container, and related technologies have been steadily developed.

In the main configuration of the conventional small hand pump, the housing constituting the external appearance of the pump, the closure used to mount the housing to the container, the stem communicating with the discharge port of the button and moving up and down along the housing, the vertical movement of the stem And a shaft for guiding and connecting the stem to the button, a piston for vertically moving along the inner wall of the housing while being mounted to the stem, a spring mounted under the inner surface of the housing, and a ball for opening and closing the inlet at the bottom of the housing. have.

However, these conventional hand pumps have some problems.

First, in the structure of the conventional small hand pump, a complicated structure and many parts are used for its operation, and thus this structure has a problem that the manufacturing process is complicated and the manufacturing cost increases.

Second, foreign matters such as water dust flow into the housing from the outside. These phenomena are caused by repeated pumping, which is closely spaced when assembling parts, and foreign matters are introduced into the housing cap and shaft, mixed with the contents, and also pumped normally by foreign matters introduced into the operating part of the pump. This becomes difficult.

Third, the opening and closing ball of the lower inlet of the housing acts to open and close the inlet by the pressure change of the inner space of the housing and the action of gravity, so that it is difficult to quickly respond to the pumping operation and also to provide a high sealing force. Therefore, some contents may leak to the container during the pumping operation, and the problem of lowering the pumping force due to the inability to perform a quick opening and closing operation is expressed. In addition, the problem that the cross-sectional area in which the lower inlet and the opening and closing ball is in close contact with each other by the structure of the opening and closing ball having a spherical shape is also expressed.

Fourth, the ball for opening and closing the metal ball is generally used to facilitate the opening and closing of the lower inlet of the housing. However, since the metal ball is a metal material, the price is higher than that of the plastic material, and also causes a chemical reaction with the content, thereby contaminating the content.

Various structures have been developed to solve this problem, but there are few hand pumps that still provide satisfactory effects.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

That is, the first object of the present invention is to simplify the assembly process of the pump by using fewer components and easy to manufacture structure to reduce the manufacturing cost, and to provide a manual pump with less risk of failure during use.

It is a second object of the present invention to provide a hand pump having an improved structure to fundamentally prevent the inflow of foreign substances from the outside.

It is a third object of the present invention to provide a manual pump capable of exerting a high sealing force and a pumping force by using an opening and closing member having a specific structure instead of a conventional opening and closing ball.

Manual pump according to the present invention for achieving this object,

Discharge port is formed and the button (button) mounted on the upper end of the shaft;

A housing having a hollow structure constituting the exterior of the pump;

A closure coupled to the upper outer surface of the housing and mounting the housing to the container;

A housing cap mounted to the upper opening of the housing, guiding the up and down movement of the following shaft, and sealing the internal space of the housing from the outside;

A shaft which is connected to the lower end of the button and moves up and down along the inner surface of the housing cap while being coupled to the outer surface of the stem;

A stem coupled with the lower inner surface of the shaft, having one or more vertical flow paths formed on the contact surface with the shaft, and having a lower extension with an indented groove in which the upper end of the following compression spring can be inserted ;

A piston configured to move up and down along the inner wall of the housing while being mounted to the lower portion of the shaft and to open and close the vertical flow path of the stem;

A compression spring that provides a restoring force to the pumping system and is located between the indentation of the lower extension of the stem and the lower inlet of the housing; And

Located at the bottom of the inner space of the housing, the opening and closing member for opening and closing the inlet of the housing when pumping;

It is configured to include.

In the hand pump of the present invention having such a structure, when the button is pressed to pump the contents, the compression spring located between the housing cap and the button is compressed, and in the process, the contents of the inner space of the housing are discharged through the vertical passage of the stem. On the contrary, when the force applied to the button is removed, the restoring force of the spring is transmitted to the shaft, and the contents of the container are introduced into the inner space of the housing.

In one preferred example, the vertical flow path may be of a structure formed between the uneven projection formed on the outer peripheral surface of the stem and the shaft inner surface. For example, a plurality of protrusions formed on the outer circumferential surface of the stem are in close contact with the inner surface of the shaft to form a space between the body of the stem and the shaft inner surface, and the contents of the pump can flow along the empty space between the protrusions and protrusions. It can be made of a structure in which a vertical flow path is formed.

In addition, the structure for forming the uneven protrusions on the outer circumferential surface of the stem ('rib structure') is generally manufactured in one-piece through the injection molding process is preferred because it can reduce the defect rate, reduce the number of parts and easy assembly.

Preferably, the lower end of the stem is formed with a multi-stage hollow extension that increases in diameter in the lower direction, the lower end of the housing is composed of a multi-stage structure that decreases in the lower direction corresponding to the hollow extension The lowering of the stem for pumping may be such that the extension ends while engaging the multi-stage inner surface structure at the bottom of the housing.

In other words, the shaft and the stem connected to the shaft is lowered at the same time as the button of the pump is pressed, and the lower stage is completed by engaging the multi-stage inner structure and the lower structure of the stem, so that various members constituting the pump may be damaged by excessive pressure. Can be reduced.

In another example, the opening and closing member for opening and closing the lower inlet of the housing may be a hollow member having an open top, and may have a structure in which radial protrusions are formed on the side thereof.

For example, when the pump is pressed, the pressure inside the housing is increased to press the opening and closing member, thus increasing the sealing force of the opening and closing member to seal the lower inlet. The hollow structure having the top open may be made to have a structure in which the sealing force is greatly increased since the hollow structure is in close contact with the bottom inlet while using the pressure inside the housing more efficiently. In addition, the locking projection is formed in the housing lower inlet of the pump to prevent the separation of the opening and closing member, the radial projections may be made of a structure in which the vertical movement range is limited by the locking projection.

On the other hand, the opening and closing member may be made of a plastic material rather than a metal ball, which is generally used, which is preferable in terms of safety and economical efficiency because it is cheaper than metal balls without chemical reaction with the contents inside the housing.

The inner surface of the lower inlet of the housing is formed with an annular projection which is closed by the opening and closing member together with the locking step, and an inner end of the annular projection may be bent in a downward direction. Therefore, the opening and closing member has a structure for vertical movement between the locking projection and the annular projection of the lower inlet opening and closing the lower inlet.

In such a structure, for example, the opening and closing member is bent in a U-shape in close contact with the annular projection, the inner end of the annular projection is also bent in a downward direction so that the surface in close contact with the opening and closing member forms a flexible curved surface. . Therefore, each of the bent outer surfaces of the opening and closing member and the annular projection may be made to have a structure for opening and closing the lower inlet while being in close contact with each other.

The close contact portion may be formed in a structure in which the cross-sectional area of the close contact portion is increased by closely contacting the bent surface of the opening and closing member and the annular protrusion, and thus the sealing force of the opening and closing member and the annular protrusion is improved.

Preferably, the inner cylinder portion of the housing cap in contact with the inner surface of the shaft is raised to a height higher than the outer cylinder portion so as to increase the sealing force of the inner space of the housing so that foreign matter such as water does not enter the inner space of the housing from the outside. It may be made of an extended structure.

In general, foreign matters are often sucked into the housing through an interface between the outer circumferential surface of the shaft and the inner surface of the housing case, so that the inner cylinder portion of the housing cap is formed to have a structure higher than that of the outer cylinder portion, thereby improving mutual sealing force. It can be further improved.

The material of each component constituting the present invention is not particularly limited, and polyethylene, polyoxymethylene, such as polypropylene, high density polyethylene (HDPE), linear low density polyethylene (LLDPE), etc. in consideration of ease of molding and price, etc. Synthetic resins such as (POM) may be preferably used. The compression spring is generally made of a stainless metal material, and in some cases, may be made of a plastic material having excellent elasticity.

Hereinafter, although described with reference to the drawings according to an embodiment of the present invention, this is for easier understanding of the present invention, the scope of the present invention is not limited thereto.

1 is a vertical cross-sectional view of a small hand pump according to an embodiment of the present invention.

Referring to FIG. 1, the small hand pump 100 includes a button 200 at the top thereof. The button 200 includes a discharge port 210 facing the side thereof, and a fastening portion 220 coupled to the shaft 700 is vertically formed inside the center of the button. The main appearance of the pump 100 is composed of a substantially cylindrical housing 300 having a multi-stage diameter and a closure 400 which serves to mount the pump 100 to a container (not shown). The housing 300 and the closure 400 are coupled to each other by a curved housing cap 500. The housing cap 500 seals the housing inner space “S” from the outside and simultaneously guides the vertical movement of the shaft 700. The compression spring 600 is mounted between the indentation groove 830 formed in the lower extension of the stem 800 and the jaw 320 formed while the diameter is changed in the housing 300 having the multi-stage diameter.

The inner space S formed between the vertical passage 710 in the shaft 700 and the housing 300 is moved by the piston 900 moving up and down while being in close contact with the outer surface of the shaft 700 and the inner surface of the housing 300. It is opened and closed. The housing internal space S is opened and closed by the operation of the opening and closing member 1000 located directly above the inlet 310.

FIG. 1 shows the pump 100 in a state where no force is applied to the button 200 (hereinafter referred to as “rest mode”), and the vertical direction of the shaft 700 is caused by the elastic force of the compression spring 600. The inner space S formed between the passage 710 and the housing 300 is sealed by the piston 900.

A pump in a state in which a downward pressure is applied to the button 200 (hereinafter referred to as “pressing mode”) is schematically illustrated in FIG. 2, and referring to FIG. 2 together with FIG. 1, the shaft 700 in pressurized mode. The stem 800 is also simultaneously lowered by the lowering of the compression spring 600 positioned between the indentation groove 830 of the stem 800 and the jaw 320 of the housing 300.

Simultaneously pressing the pump 200, the shaft 700 and the stem 800 mounted on the inner surface of the shaft 700 are lowered, and the contents of the housing 300 are increased in pressure. According to this pressure, the contents pass through the stem 800 and enter the vertical passage 710 of the shaft 700, and push the opening / closing member 1000 downward to inlet 310 located at the lower end of the housing 300. To close.

On the other hand, since the frictional force that the outer edge 910 of the piston 900 has on the inner surface of the housing 300 is greater than the friction force that the inner edge 920 has on the outer surface of the stem 800, the shaft 700 is formed on the shaft 700. The piston 900 does not move until the lower end of the side protrusion 720 reaches the upper end of the inner edge 920 of the piston 900. Accordingly, the interior space S between the vertical passage 710 of the shaft 700 and the housing 300 is opened to each other, and the contents pressurized in the housing interior space S are vertical passages 710 of the shaft 700. Flows into and rises.

Again, referring to FIG. 1 in the rest mode, the shaft 700 and the stem 800 are simultaneously raised by the restoring force of the compression spring 600, and the outer edge 910 of the piston 900 as described above. Due to the dualized frictional forces of the inner and inner edges 920, the piston 900 does not move until the inner edge 920 comes into contact with the hollow extension of the stem 800 (FIG. 4: 820). Accordingly, the stem 800 is raised while the internal space S between the vertical passage 710 of the shaft 700 and the housing 300 is sealed to each other, and a pressure drop in the housing internal space S occurs. do. This pressure drop is solved as the contents are introduced into the internal space S of the housing 300 while the opening and closing member 1000 is opened.

Hereinafter, some elements constituting the pump 100 of FIG. 1 will be described in more detail with reference to FIGS. 3 and 4.

First, FIG. 3 schematically shows a plan view, a side view, and a bottom view of the opening and closing member constituting the pump of FIG. 1.

Referring to FIG. 3, the opening and closing member 1000 is formed of a hollow member having an open top, and has a structure in which a radial protrusion 1010 is formed on the side of the opening and closing member 1000. The radial protrusion 1010 opens and closes the member 1000 to the internal space (FIG. 1: S) of the housing 300 by a locking step (FIG. 1: 330) formed at the lower inlet (FIG. 1: 310) of the housing 300. The phenomenon of leaving out can be prevented. The opening and closing member 1000 is made of a U-shaped structure in the vertical cross section, it is made of a structure that is inserted into the portion between the locking step (Fig. 1: 330) and the annular projection (Fig. 1: 340) while being elastically pressed during assembly.

In addition, since the opening and closing member 1000 has a hollow structure having an upper end open, the opening and closing member 1000 is in close contact with the lower inlet (FIG. 1: 310) while efficiently using the pressure inside the housing (FIG. 1: 300), and provides a sealing force. It is made of a structure that raises even more.

Next, in FIG. 4, the top view, side view, and bottom view of the stem which comprise the pump of FIG. 1 are shown typically.

Referring to FIG. 4 together with FIG. 2, the stem 800 includes a hollow body 810 having both sides open, and an extension part having a multistage shape in which a diameter increases in a downward direction while being connected to the hollow body 810. 820). Thus, the lowering of the stem 800 for pumping consists of a structure in which the extension 820 terminates while engaging the multi-stage inner surface structure at the bottom of the housing. An indentation groove 830 is formed at a lower end of the extension part 820, so that an upper end of the compression spring 600 is inserted into the indentation groove 830.

In addition, in the pressing mode of FIG. 2, the contents in the inner space S of the housing 300 are raised along the vertical flow path formed between the uneven protrusion 840 formed on the outer circumferential surface of the stem 800 and the inner surface of the shaft 700. Afterwards, a small amount is discharged to the outside of the pump 100 via the discharge port 210 formed in the button 200.

5 is a plan view, side views and a bottom view of the housing cap constituting the pump of FIG.

Referring to FIG. 5 as shown in FIG. 1, the housing cap 500 is mounted to the upper opening of the housing 300 to seal the internal space S of the housing 300 from the outside of the pump 100, and the shaft 700. It consists of a hollow structure to guide the up and down movement of).

The inner cylinder portion 510 of the housing cap 500, which is in contact with the outer surface of the shaft 700, increases the sealing force between the shaft 700 and the housing cap 500, so that foreign matter such as water from the outside is introduced into the housing 300. In order not to flow into the space (S), it has a structure extending upward to a height (H) relatively higher than the outer cylinder portion 520.

Although described above with reference to the drawings according to an embodiment of the present invention, those of ordinary skill in the art will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

As described above, the compact hand pump according to the present invention can simplify the assembly process of the pump, reduce the manufacturing cost, and greatly reduce the risk of failure even during use by constructing a structure in which the parts are easy to use and easy to manufacture. have.

In addition, by using the opening and closing member of a specific structure instead of the conventional opening and closing ball, it is possible to exhibit a high sealing force and pumping force, and by forming the inner cylinder portion of the housing cap in a structure higher than the outer cylinder portion, foreign matters from the outside into the housing It is effective to prevent the insertion.

Claims (6)

Discharge port is formed and the button (button) mounted on the upper end of the shaft; A housing having a hollow structure constituting the exterior of the pump; A closure coupled to the upper outer surface of the housing and mounting the housing to the container; A housing cap mounted to the upper opening of the housing, guiding the up and down movement of the following shaft, and sealing the internal space of the housing from the outside; A shaft which is connected to the lower end of the button and moves up and down along the inner surface of the housing cap while being coupled to the outer surface of the stem; A stem coupled with the lower inner surface of the shaft, having one or more vertical flow paths formed on the contact surface with the shaft, and having a lower extension with an indented groove in which the upper end of the following compression spring can be inserted ; A piston configured to move up and down along the inner wall of the housing while being mounted to the lower portion of the shaft and to open and close the vertical flow path of the stem; A compression spring that provides a restoring force to the pumping system and is located between the indentation of the lower extension of the stem and the lower inlet of the housing; And Located at the bottom of the inner space of the housing, the opening and closing member for opening and closing the inlet of the housing when pumping; Hand pump is configured to include. The hand pump as claimed in claim 1, wherein the vertical flow path is formed between an uneven protrusion formed on an outer circumferential surface of the stem and an inner surface of the shaft. According to claim 1, wherein the lower end of the stem is formed with a multi-stage hollow extension to increase the diameter in the lower direction, the lower end of the housing in a multi-stage structure corresponding to the hollow extension is reduced in the lower direction And the lowering of the stem for pumping ends with the extension engaging the multi-stage inner surface structure at the bottom of the housing. The hand-operated pump according to claim 1, wherein the opening and closing member is a hollow member having an open top and radial protrusions are formed on the side thereof. The hand pump according to claim 1, wherein an annular protrusion is formed on an inner surface of the lower end of the housing and closed by an opening and closing member, and an inner end portion of the annular protrusion is bent in a downward direction. The inner cylinder portion of the housing cap in contact with the inner surface of the shaft is extended upward to a height higher than the outer cylinder portion so as to increase the sealing force of the inner space of the housing to the external environment. Hand pump.

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