KR20200118548A - Back flow pumping device which can suction a remaining contents in nozzle - Google Patents

Abstract

The present invention relates to a back flow pumping device capable of suction of contents remaining in a nozzle. Particularly, an internal blade and an external blade are formed in a piston valve opening or closing a flow path communicating with a fluid path, wherein the contact frictional force of the internal blade with the outside of a piston member and a stem portion is formed to be larger than the contact frictional force of the external blade with the inside of a cylinder member. In this manner, the back flow pumping device can suck the contents remaining in a nozzle and can prevent the contents in a nozzle from solidification or degeneration.

Description

Back flow pumping device which can suction a remaining contents in nozzle}

The present invention relates to a backflow pumping device capable of inhaling the contents remaining in a nozzle, and more specifically, an inner wing and an outer wing are formed on a piston valve that opens or closes a flow passage communicating with a fluid passage, and the inner wing By forming the contact friction force between the outer side of the piston member and the stem part to be greater than the contact friction force between the outer blade and the inner side of the cylinder member, the contents remaining in the nozzle can be sucked and the contents inside the nozzle can be prevented from being hardened or deteriorated. It is about a backflow pumping device.

In general, a pump container in which a liquid is discharged to the outside along a discharge pipe by a pumping motion is widely used, such as a cosmetic container, a detergent container, and a shampoo container.

This pump container has the function of discharging the contents of the liquid to the outside by a certain amount, thereby promoting convenience of use and also reducing the waste of contents by suppressing excessive discharge of liquid. Various structures have been proposed so far. It is widely used.

The general principle of the pump container is that when the push button of the pump container is pressed with a finger, the contents of the liquid inside the container are pumped with a pressing force generated by the operation of the push button, and a certain amount is discharged to the outside through a nozzle formed on the push button. will be.

In the pumping type container as described above, after the contents are discharged by pressing the button part, the contents remain at the tip of the nozzle of the button part, and the contents remaining at the tip of the nozzle flow down, causing contamination of the container as well as air. There was a problem of being hardened or deteriorated in contact with.

In addition, since the nozzle is closed due to the solidification of the contents remaining at the tip of the nozzle, the nozzle is not smoothly discharged.Therefore, the contents fixed to the tip of the nozzle must be removed and the contents must be discharged during the next use, causing inconvenience to the user. Of course, there is a problem in that the contents are wasted unnecessarily.

In addition, in order to solve the above problems, conventional pumping containers for re-suctioning the contents remaining in the nozzle have a very complex structure for suctioning the contents remaining in the tip of the nozzle, and the assembly time according to the addition of the number of parts Not only the productivity is lowered by the increase, but there is also a problem that the unit cost of the container is increased.

On the other hand, as a prior art for a pumping device for a liquid container, there is Korean Utility Model Registration No. 20-0205301.

The present invention was conceived to solve the problems of the prior art as described above, but forming an inner wing and an outer wing on a piston valve that opens or closes a flow passage communicating with the fluid passage, the inner wing and the piston member and the stamp portion By forming the contact friction force with the outer side to be greater than the contact friction force between the outer wing and the inner side of the cylinder member, the contents remaining in the nozzle are sucked, and the contents are present at the entrance of the nozzle, making the area around the entrance dirty or the contents hardened at the entrance. Its purpose is to provide a backflow pumping device that can prevent solidified lumps from coming out together during the next discharge.

The problem to be solved by the present invention is not limited to the above-described problem, and other technical problems that are not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description.

A backflow pumping device capable of inhaling contents remaining in a nozzle according to the present invention for achieving the above object comprises: a cylinder member having a chamber space formed therein; A piston member formed on the inside of the cylinder member and having an open lower end; A spring formed between an outer peripheral surface of the piston member and an inner peripheral surface of the cylinder member; A stamp portion coupled to the opened structure at the lower end of the piston member; And a piston valve coupled to an outer side of the piston member and the stem portion, wherein the piston valve includes an inner wing portion and an outer wing portion.

In this case, the piston valve is characterized in that the contact friction force generated between the inner wing portion and the outer side of the piston member and the stem portion is formed to be greater than the contact friction force generated between the outer wing portion and the inner wall of the cylinder member. .

In the backflow pumping device capable of inhaling the contents remaining in the nozzle according to the present invention, an inner wing and an outer wing are formed on a piston valve that opens or closes a flow passage communicating with the fluid passage, and the inner wing, the piston member, and the stamp part By forming the contact friction force with the outside to be greater than the contact friction force between the outer blade and the inner side of the cylinder member, the contents remaining in the nozzle can be sucked and the contents in the nozzle can be prevented from being hardened or deteriorated.

In addition, without the need to add a configuration to the pumping device or change other configurations, the number of parts is configured so that the backflow action can be achieved simply by adjusting the contact friction force between the inner and outer blades and each contacting part only by changing the shape of the piston valve. There is an effect of improving productivity by shortening the assembly time according to the reduction.

In addition, by forming the lower end of the piston member in an open structure, by combining the extended portion of the stem portion formed in the form of a flat straight to the open structure of the lower end of the piston member, By forming a flow path into a large space, it is possible to discharge particles of a certain size or more, and even a material having a high viscosity can be pumped with a relatively small force.

In addition, by installing a spring in an outer space separated from the discharge path of the contents, there is an effect of preventing deterioration of the contents by the spring.

In addition, since most of the negative pressure holes formed on one side of the guide member are blocked by the guide member and are formed in a structure with only a very small gap, air can enter the container, but the contents inside the container leak through this negative pressure hole. Things can be prevented.

In addition, by forming a waterproof cover on the top of the outer cylinder of the piston member, there is an effect of preventing foreign substances such as water from penetrating into the container.

The effects of the present invention are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a cross-sectional view of a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention.
2 and 3 are cross-sectional views illustrating a state in which an external force pressed by a user is applied to a pressure handle in a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention.
4 and 5 are cross-sectional views illustrating a state in which an external force pressed by a user against a pressure handle is removed in a backflow pumping device capable of sucking contents remaining in a nozzle according to an embodiment of the present invention.
6 is a cross-sectional view showing a state in which an external force is removed from a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention, and the piston member is returned to its original state by a spring.
7 is an exploded perspective view of a piston member, a stem part, and a piston valve in a backflow pumping device capable of sucking contents remaining in a nozzle according to an embodiment of the present invention.
8 is a perspective view showing a state in which a flow path is closed in a state in which a piston member, a stem part, and a piston valve are combined in a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention.
9 is a diagram illustrating a state in which the flow path is fully opened and only half opened in a state in which a piston member, a stem part, and a piston valve are combined in a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention. It is a perspective view shown.
10 is a view showing a state in which protrusions are formed on a piston member and a piston valve in order to increase contact friction in a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some configurations irrelevant to the gist of the invention will be omitted or compressed, but the omitted configuration is not necessarily a configuration unnecessary in the present invention, and will be combined and used by a person having ordinary knowledge in the technical field to which the present invention belongs. I can.

1 is a cross-sectional view of a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention, and FIGS. 2 and 3 are views capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention. A cross-sectional view showing a state in which an external force pressed by a user is applied to a pressurizing handle in a backflow pumping device, and FIGS. 4 and 5 are a backflow pumping device capable of sucking contents remaining in a nozzle according to an embodiment of the present invention. Is a cross-sectional view showing a state in which an external force pressed by a user on the pressurizing handle is removed, and FIG. 6 is a backflow pumping device capable of sucking the contents remaining in the nozzle according to an embodiment of the present invention. A cross-sectional view showing a state in which the piston member is restored to its original state, and FIG. 7 is an exploded perspective view of a piston member, a stamp part, and a piston valve in a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention. 8 is a perspective view showing a state in which a flow path is closed in a state in which a piston member, a stamp part, and a piston valve are combined in a backflow pumping device capable of sucking contents remaining in a nozzle according to an embodiment of the present invention, 9 is a diagram illustrating a state in which the flow path is fully opened and only half opened in a state in which a piston member, a stem part, and a piston valve are combined in a backflow pumping device capable of inhaling contents remaining in a nozzle according to an embodiment of the present invention. It is a perspective view shown.

1 to 9, the backflow pumping device 100 capable of inhaling the contents remaining in the nozzle according to the embodiment of the present invention is used in combination with a storage container such as perfume, shampoo, cosmetics, etc. , A cylinder member 30, a piston member 40, a guide member 90, a cap member 20 and a pressure handle 10.

The cylinder member 30 has a chamber space 31 for piston movement therein, and a tube coupling part 32 in which a tube 70 that sucks the contents of the container and supplies it to the chamber space 31 is coupled to the lower part. ) And a passage through which the contents of the container flow into the chamber space 31, a suction port 33 is formed, and in the suction port 33, the piston member 40 is disposed within the chamber space 31 of the cylinder member 30. A ball valve 80 for opening and closing the suction port 33 connected to the chamber space 31 is formed as it moves up and down. In addition, an upper end of the ball valve 80 is formed with a locking protrusion 34 for limiting the elevation of the ball valve 80.

When the piston member 40 descends, the ball valve 80 descends with the increase in pressure as the chamber space 31 narrows to close the suction port 33, and when the piston member 40 rises, the piston As the member 40 rises, the ball valve 80 rises by the vacuum pressure generated in the chamber space 31 to open the suction port 33 so that the contents stored in the container are transferred through the suction port 33 to the chamber space ( 31), and when the piston member 40 descends again with an external pressing force while the contents are introduced into the chamber space 31, the ball valve 80 closes the suction port 33 and the chamber space 31 ) Is discharged to the outside through the fluid passage 41 of the piston member 40 and the nozzle 11 of the pressure handle 10 with the pumping force generated by the narrowing.

In addition, an extension part 35 is formed on the upper part of the cylinder member 30 to be held in contact with the lower surface of the cap member 20, and the lower surface of the expansion part 35 is supported by the container and the upper surface is It is supported and fixed to the cap member 20.

And the packing 36 is inserted between the lower end of the expansion part 35 of the cylinder member 30 and the upper end of the container, and the contents in the container are not leaked by being pressurized between the lower surface of the expansion part 35 and the container. In addition, a negative pressure hole 37 is formed on one side of the side of the cylinder member 30 to allow the contents to be discharged smoothly by filling with air as much as the contents stored in the container exit. At this time, in the present invention, since most of the negative pressure hole 37 is blocked by the guide member 90 and formed in a structure with only a very small gap, air can enter the container, but through the negative pressure hole 37 It can prevent leakage of the contents inside.

A guide member 90 for guiding the piston movement of the piston member 40 is formed inside the cylinder member 30, and a protrusion 91 extending outward from the upper portion of the guide member 90 is formed in the cylinder member 30 It is fixed by being caught on the top of ).

In addition, a waterproof cover 92 is formed on the top of the protrusion 91 of the guide member 90, and the waterproof cover 92 serves to prevent foreign substances such as water from penetrating into the container and contaminating the contents. Do it.

The piston member 40 is inserted and formed inside the guide member 90, and the piston moves in the chamber space 31 of the cylinder member 30 to pump the contents stored in the container to the chamber space 31. The inflow and introduced contents are discharged to the outside through the nozzle 11 of the pressure handle 10 coupled to the upper end of the piston member 40.

In addition, the piston member 40 is supported by a spring 93 formed between the outer circumferential surface of the piston member 40 and the inner circumferential surface of the guide member 90, and the spring 93 is supported by an external force pressed by the user. Accordingly, when the piston member 40 descends, it contracts, and when the pressing force disappears, the piston member 40 is raised with an elastic restoring force. In the present invention, by installing the spring 93 in an outer space separated from the discharge path of the contents, it is possible to prevent deterioration of the contents by the spring 93.

The piston member 40 has a fluid passage 41 through which the contents can move through the top and bottom, and the stem part 50 is coupled to the opened structure at the bottom.

The stamp portion 50, as shown in Figs. 3 to 5, is composed of a circular portion 51 at the lower end, and an extension portion 52 protruding in a flat straight shape on the upper end of the circular portion 51. , The extension part 52 is inserted into and coupled to the lower open structure of the piston member 40. At this time, since the extension part 52 of the stamp part 50 is formed in a flat straight shape, even if it is coupled to the lower open structure of the piston member 40, a flow path of a large space on both sides of the extension part 52 Is formed.

As described above, in a state in which the stem part 50 is coupled to the lower open structure of the piston member 40, the fluid passage 41 is communicated outside the piston member 40 and the stem part 50. A piston valve 60 for opening or closing the flow path is coupled.

The piston valve 60 is to be more closely contacted with the outer side of the piston member 40 and the stem part 50 and the inner wall of the cylinder member 30 while minimizing deformation during lifting and lowering inside the cylinder member 30. The inner wing portion (60a) and the outer wing portion (60b) are formed on both sides so that the piston valve 60 is the outer side of the piston member 40 and the stamp portion 50, and the cylinder member 30 ), the inner wing portion 60a is in close contact with the outer side of the piston member 40 and the stem portion 50, and the outer wing portion 60b is the inner wall of the cylinder member 30 The contents in the chamber space 31 at the bottom of the cylinder member 30 can be moved only through the flow path formed between the opened structure at the bottom of the piston member 40 and the extension part 52 of the stem part 50 by in close contact with The chamber space 31 at the bottom of the cylinder member 30 is completely sealed.

At this time, the inner wing portion (60a) and the outer wing portion (60b) are in close contact with the outer side of the piston member 40 and the inner wall of the cylinder member 30, respectively, a contact friction force is generated. In the present invention, the inner side By adjusting the inner diameter of the wing portion (60a) and the outer diameter of the outer wing portion (60b), the gap between the inner wing portion (60a) and the piston member (40) is adjusted to the outer wing portion (60b) and the cylinder member ( By forming smaller than the gap between the inner wall of 30), the contact friction force (A) generated between the inner wing portion 60a and the outer side of the piston member 40 is reduced to the outer wing portion 60b and the cylinder member 30 ) Is formed larger than the contact friction force (B) generated between the inner walls of (A>B), and when the piston member 40 rises, the piston member 40 and the piston valve 60 rise and fall with a time difference. Make sure that the flow path is half-opened and maintained for a certain period of time.

A detailed description of a process in which the piston member 40 and the piston valve 60 rise with a time difference causes the flow path to be half-opened and is maintained for a predetermined period of time will be described later.

As described above, in the present invention, the lower end of the piston member 40 is formed in an open structure, but the extension part 52 of the stamp part 50 formed in a flat straight shape in the open structure at the lower end of the piston member 40 By combining, a flow path formed between the open structure at the bottom of the piston member 40 and the extension part 52 of the stem part 50 is formed into a large space, so that particles of a certain size or more can be discharged, and a material having a high viscosity Also, pumping is possible with relatively small force.

Specifically, in the prior art, in order to form a vacuum for suction of the contents stored in the container because the push rod was formed as one body, the lower end of the push rod had to be formed in a closed structure, and thus the passage through which the contents are discharged is formed in a hole or It had to be formed with slits. Accordingly, grains larger than a certain size could not be discharged through the small hole on the side of the piston, and when discharging a material having a high viscosity, a large force was input, causing inconvenience to the user.

On the other hand, in the present invention, the lower end of the piston member 40 has an open structure, and a stamp part 50 including a circular part 51 and an extension part 52 in a flat, straight shape is formed, and the extension part ( 52) is coupled to the open structure at the bottom of the piston member 40, and then the piston valve 60 is coupled to the outer side of the piston member 40 and the stamp unit 50, so that the circular portion 51 and the piston valve 60 ) To form a vacuum in the chamber space (31) to allow the contents of the container to flow into the chamber space (31), and at the same time, the flow path is formed into a large space by the straight extension part 52 to pump large particles. This is possible, and even a material with a high viscosity can be pumped with a relatively small force.

Hereinafter, an operation process of the backflow pumping device capable of inhaling the contents remaining in the nozzle according to the present invention, and an effect thereof will be described.

First, when the user presses the pressurizing handle 10 to discharge the contents, the piston member 40 descends and the stem part 50 and the piston valve 60 also descend at the same time, as shown in FIG. The piston valve 60 descends more slowly than the piston member 40 and the stem 50 due to the frictional force between the outer wing part 60b and the inner circumferential surface of the cylinder member 30, and due to such a difference in descending speed As the piston valve 60 rises from the outside of the piston member 40 and the stamp part 50, between the opened structure at the lower end of the piston member 40 and the extension part 52 of the stamp part 50 After the formed flow path is partially opened, immediately as shown in FIG. 3, the piston valve 60 rises until it contacts the upper protrusion 42 formed outside the piston member 40, and the piston member ( 40) The cylinder member 30 among the wing portions 61 on both sides of the piston valve 60 in a state in which the flow path formed between the open structure at the bottom and the extension portion 52 of the stem portion 50 is opened to the maximum. ), the piston member 40 and the piston valve 60 are lowered until the lower end of the inner circumferential surface and the lower end of the cylinder member 30 contacts the lower end of the cylinder member 30 so as not to descend any more. That is, when the piston member 40 descends, only a part of the flow path is opened with a short time difference and then immediately opened to the maximum.

As the passage is opened as described above, the contents of the chamber space 31 flow into the fluid passage 41 at the center of the piston member 40 through the passage.

At this time, the ball valve 80 maintains a closed state of the suction port 33 due to an increase in pressure as the piston member 40 descends.

As described above, in the present invention, the lower end of the piston member 40 is formed in an open structure, but the extension part 52 of the stamp part 50 formed in a flat straight shape in the open structure at the lower end of the piston member 40 By combining, a flow path formed between the open structure at the bottom of the piston member 40 and the extension part 52 of the stem part 50 is formed into a large space, so that particles of a certain size or more can be discharged, and a material having a high viscosity Also, pumping is possible with relatively small force.

Specifically, in the conventional pumping device, in order to form a vacuum for suction of the contents stored in the container because the push rod is formed as one body, the lower end of the push rod has to be formed in a closed structure, and thus the passage through which the contents are discharged is formed on the side of the piston. It had to be formed with holes or slits. Accordingly, grains larger than a certain size could not be discharged through the small hole on the side of the piston, and when discharging a material having a high viscosity, a large force was input, causing inconvenience to the user.

On the other hand, in the present invention, the lower end of the piston member 40 has an open structure, and a stamp part 50 including a circular part 51 and an extension part 52 in a flat, straight shape is formed, and the extension part ( 52) is coupled to the open structure at the bottom of the piston member 40, and then the piston valve 60 is coupled to the outer side of the piston member 40 and the stamp unit 50, so that the circular portion 51 and the piston valve 60 ) To form a vacuum in the chamber space (31) to allow the contents of the container to flow into the chamber space (31), and at the same time, the flow path is formed into a large space by the straight extension part 52 to pump large particles. This is possible, and even a material with a high viscosity can be pumped with a relatively small force.

In addition, since the conventional pumping device has a small flow path, it is well blocked when particles larger than a certain size are discharged, and once the flow path is blocked, it is difficult to penetrate. However, the pumping device 100 of the present invention forms a flow path large to In the case of discharging grains larger than the size, not only is it not well blocked, but if the piston member 40 is pressed hard even if it is blocked, it is subjected to a large pressure because the area of the flow path is large, so that the blockage is well punctured.

In addition, by installing the spring 93 in the outer space separated from the fluid passage 41, which is a discharge path of the contents, it is possible to prevent deterioration of the contents by the spring 93.

Thereafter, when the external force applied to the pressurizing handle 10 is removed, the piston member 40 rises by the elastic force of the spring 93, and the stem part 50 and the piston valve 60 also rise at the same time. The contact friction force (A) generated between the wing portion 60a and the outer side of the piston member 40 and the stamp portion 50 is generated between the outer wing portion 60b and the inner wall of the cylinder member 30 (B) Because it is larger than (A>B), the piston valve 60 rises together with the piston member 40 by the contact friction force (A), but the contact friction force (B) acts at the same time, so it rises at a time difference, that is, the piston member The piston valve 60 rises more slowly than the 40. Accordingly, a gap is generated for a certain time until the piston valve 60 reaches the upper end of the stem part 50, and the half-open state of the flow path is maintained for a certain time.

As described above, when the piston member 40 rises, the piston valve 60 is pulled upward by a predetermined length, and between the opened structure at the lower end of the piston member 40 and the extended portion 52 of the stem part 50 As shown in FIGS. 4 and 5, the flow path formed in is in a semi-open state in which only a part is opened, and then continues for a certain time. Thereafter, as shown in FIG. 6, when the piston member 40 rises until the inner wing part 60a of the piston valve 60 contacts the circular part 52 of the stem part 50, the The flow path formed between the opened structure at the lower end of the piston member 40 and the extension part 52 of the stamp part 50 is completely closed. In other words, when the piston member 40 rises, the flow path is completely closed after the semi-open state of the flow path continues for a certain period of time with a brief time difference.

At this time, as the half-open state of the flow path continues for a certain period of time, the piston member 40 rises, and the ball valve 80 rises by the vacuum pressure generated in the chamber space 31 to open the suction port 33 to the container. A backflow (reverse flow) action in which the stored and stored contents flow into the chamber space 31 through the suction port 33 and cannot be discharged at the same time, and the contents remaining in the nozzle 11 are re-sucked back into the chamber space 31 This will happen. That is, since suction is performed simultaneously from the upper and lower sides of the chamber space 31, the contents are sucked from the container from the lower side, and the contents remaining inside the nozzle 11 are also sucked from the upper side. Here, the content is sucked from the top is the backflow.

The contents remaining in the nozzle 11 can be re-sucked by such a backflow (reverse flow) action, so that the contents in the nozzle 11 can be prevented from being hardened or deteriorated.

In addition, by adjusting the contact friction force between the inner wing (60a) and the outer wing (60b) and each abutting portion only by changing the shape of the piston valve 60 without the need to add a configuration to the pumping device 100 or change other configurations By simply configuring the backflow action to take place, there is an effect of improving productivity by reducing the assembly time according to the reduction in the number of parts.

Meanwhile, FIG. 10 is a view showing a state in which protrusions are formed on a piston member and a piston valve in order to increase contact friction in a backflow pumping apparatus capable of sucking contents remaining in a nozzle according to an embodiment of the present invention.

First, as shown in Fig. 10 (a), by forming protrusions 61 and 40a on the outer side of the inner wing 60a and the piston member 40, respectively, the piston is caught between the protrusions 61 and 40a. When the member 40 is raised, the piston valve 60 is pulled up together.

Due to the above structure, the piston member 40 is interlocked with the protrusion 61 formed on the inner wing 60a and the protrusion 40a formed on the outer side of the piston member 40 at the initial ascent of the piston member 40. The piston valve 60 is pulled up together, but after that, when the vacuum pressure in the lower chamber space 31 increases, the protrusion 61 formed on the inner wing 60a and the protrusion 40a formed on the outer side of the piston member 40 As the locking state is released, the piston member 40 rises and the piston valve 60 does not rise, and the flow path is closed. At this time, when the protrusion 61 formed on the inner wing part 60a and the protrusion 40a formed on the outer side of the piston member 40 engage each other, a semi-open state of the flow path occurs, and the locking state between the protrusions 61 and 40a is constant. The flow path is completely closed when the jammed state is released after the half-open state of the flow path lasts for a certain period of time.

Meanwhile, as shown in FIG. 10(b), the protrusion 40a is formed only on the outside of the piston member 40 to increase the contact friction force A generated between the inner wing part 60a and the outside of the piston member 40. The contact friction force (A) generated between the inner wing portion 60a and the outer side of the piston member 40 is greater than the contact friction force (B) generated between the outer wing portion 60b and the inner wall of the cylinder member 30 (A >B) it is also possible. Due to this difference in contact friction force, when the piston member 40 is raised, the piston valve 60 is initially pulled up together and the half-open state is maintained for a certain period of time, and after that, the vacuum pressure in the lower chamber space 31 increases and the piston is no longer The member 40 does not lift the piston valve 60 and rises by itself, thereby closing the flow path.

As described in detail above, the backflow pumping device capable of inhaling the contents remaining in the nozzle according to the present invention has an inner wing and an outer wing formed on a piston valve that opens or closes a flow passage communicating with a fluid passage, but the inner wing By forming the contact friction force with the outer side of the piston member and the stem part to be greater than the contact friction force between the outer blade and the inner side of the cylinder member, the contents remaining in the nozzle can be sucked and the contents in the nozzle can be prevented from being hardened or deteriorated. .

In addition, without the need to add a configuration to the pumping device or change other configurations, the number of parts is configured so that the backflow action can be achieved simply by adjusting the contact friction force between the inner and outer blades and each contacting part only by changing the shape of the piston valve. There is an effect of improving productivity by shortening the assembly time according to the reduction.

In addition, by forming the lower end of the piston member in an open structure, by combining the extended portion of the stem portion formed in the form of a flat straight to the open structure of the lower end of the piston member, formed between the open structure of the lower end of the piston member and the extended portion of the stem portion. By forming a flow path into a large space, it is possible to discharge particles of a certain size or more, and even a material having a high viscosity can be pumped with a relatively small force.

In addition, by installing a spring in an outer space separated from the discharge path of the contents, there is an effect of preventing deterioration of the contents by the spring.

In addition, since most of the negative pressure holes formed on one side of the guide member are blocked by the guide member and are formed in a structure with only a very small gap, air can enter the container, but the contents inside the container leak through this negative pressure hole. Things can be prevented.

In addition, by forming a waterproof cover on the top of the outer cylinder of the piston member, there is an effect of preventing foreign substances such as water from penetrating into the container.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention. And additions will be seen as falling within the scope of the claims of the present invention.

10: pressure handle
11: nozzle
20: cap member
30: cylinder member
31: chamber space
32: tube coupling part
33: inlet
34: locking jaw
35: extension
36: packing part
37: negative pressure hole
40: piston member
41: fluid passage
42: upper protrusion
50: stamp part
51: circular part
52: extension
60: piston valve
60a: inner wing part
60b: outer wing part
70: tube
80: ball valve
90: guide member
91: protrusion
92: waterproof cover
93: spring
100: backflow pumping device

Claims (2)

A cylinder member having a chamber space formed therein;
A piston member formed on the inside of the cylinder member and having an open lower end;
A spring formed between an outer peripheral surface of the piston member and an inner peripheral surface of the cylinder member;
A stamp portion coupled to the opened structure at the lower end of the piston member; And
Includes; a piston valve coupled to the outside of the piston member and the stamp portion,
A backflow pumping device capable of sucking the contents remaining in the nozzle, characterized in that the piston valve has an inner wing portion and an outer wing portion.
The method of claim 1,
The piston valve,
Inhalation of the contents remaining in the nozzle, characterized in that the contact friction force generated between the inner wing portion and the outer side of the piston member and the stem portion is formed to be greater than the contact friction force generated between the outer wing portion and the inner wall of the cylinder member Capable backflow pumping device.

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