Airless dispensing pump container with an airtight push down type nozzle head

An airless dispensing pump container with an airtight nozzle head of a push down type capable of discharging a fixed amount of content is disclosed, in which a vacuum sealing function is enhanced in the whole structure of the present invention, and a content opening and closing plate of a content opening and closing valve member in the construction of a content discharge part of a nozzle head is automatically opened and closed, along with a reliable discharge of the content, and a reverse flow and leakage are prevented by improving a structure of a content pump piston which sucks and transfers the content. When a pump cylinder is slanted at a certain angle along with the content storing container or in case of a content having high viscosity, it is possible to improve the operation errors of the ball valve by providing an inventive structure of the ball valve support installed at a lower side of the stem.

TECHNICAL FIELD

The present invention relates to an airless dispensing pump container with an airtight push down type nozzle head that is capable of discharging a fixed amount of content, while being engaged at a content storing container which is able to store various cosmetic contents.

BACKGROUND ART

Generally, in case of liquid cosmetic, a pump dispenser is used so as to easily discharge cosmetic stored in a content storing container based on a manual pumping operation by the user.

The above pump dispenser for discharging stored liquid contents that is based on a pumping operation is made in various types. Here, a nozzle head up and down type pump dispenser container is more often generally used. According to a nozzle head up and down type, a vertical or horizontal nozzle head compresses the content pump piston connected to a nozzle head in a vertical or horizontal state by an external force thereby discharging its content. After the above operation is performed, it returns to original state with the help of a return spring and the content of the storage container is sucked into the cylinder. In another type of dispenser structure, as a nozzle head moves down in a vacuum seal state, the content compression piston received in the content storing container moves down by the height corresponding to the discharged amount of content.

In the former case, an external air may be inputted into the content storing container after the content is discharged, so that the negative pressure in the container is removed. In the later case, since an external air is not inputted into the content storing container after the content is discharged, it keeps a vacuum state all the time.

In the former case, since the external air (in particular, oxygen) resides in the content storing container at all the times, the content may give quality-changes and may be easily oxidized and decayed. So, in the former case is not actually applied to the contents which contain high pure extracts or vitamin components.

The later case is generally used for the prevention of oxidation or decay of high quality cosmetic which does not need antiseptic substances. The present invention corresponds to the later case. When the content is discharged, the nozzle head and the content compression piston move down step by step.

According to the conventional nozzle head down pump dispenser container, there is a Korean patent registration number 10-0525455 “fixed amount discharge structure of nozzle head down vacuum type cosmetic container” (hereinafter referred to conventional art 1) which is invented by the applicant of the present invention. There is a Korean patent publication number 1999-0066973 “apparatus for discharging liquid or paste substance and method for assembling the same” (hereinafter referred to conventional art 2).

In addition, there is a Germany patent number DE295066826U “Abgabepumpe aus Kunststoff für pastenartige stoffe” which is designed to enhance the nozzle air sealing state of a nozzle head (hereinafter referred to conventional art 3). There is a PCT number WO 2006-116312 A2 “dispenser having air tight spout” (hereinafter referred to conventional art 4) in which an elastic member is installed at the nozzle hole.

According to the conventional art 1, there is not disclosed any element between the content collection chamber and the container housing for blocking the content. So, the content of the collection chamber reverse-flows into the content storing container, so that it is impossible to implement a fixed discharge amount of the liquid since there is not any reverse flow prevention function. In particular, the content has low viscosity, when the content is filled via the lower side of the container housing, and the lower side of the same is capped with the lower container, the container housing may have a certain level of pressure therein, so that the content may leak via the nozzle hole since the content reverse-flows.

According to the conventional art 2, it is designed so that a certain amount of content may be discharged at one time by the pressing pressure of the nozzle. So, it is impossible to implement a fixed amount of discharge. In case if the content has a low viscosity, the content may leak via the nozzle hole due to a reverse flow of discharge. Since the opening of the nozzle hole of the nozzle head is open all the time, the air may be inputted into the interior of the pump via the nozzle hole, so that the content may be solidified when contact with external air, whereby the content may not be smoothly discharged.

According to the conventional art 3, a plug type discharge valve is engaged at the nozzle hole of the nozzle head. The discharge valve is made of an elastic material, and it has an opening and closing function. However, In the above conventional art 3, since large parts of the front end of the discharge valve is exposed due to the construction of the plug type discharge valve, a certain gap may be formed between the discharge valve and the valve hole when it receives an external pressure or the certain pressure difference occurs between the inner and outer atmospheres of the pump, so that a certain foreign substance or air may easily penetrate into the inside of the pump or the content of the inside of the pump may be forced to pressurize the discharge valve, whereby the liquid can and may leak.

In addition, the valve operation is performed for mainly discharging the content of the container. So, it is impossible to accurately control the flow rate and velocity of the content. When the content having low viscosity is discharged, the content may be sprayed in a radial direction, so that it may run down along the nozzle head. In the above art, the discharge valve should be engaged at the nozzle hole in a flow direction of the liquid, but the discharge valve is engaged at a slanted direction, so that the content that has a low viscosity may be discharged in not fixed one direction thereby causing many problems in use.

According to the conventional art 4, the content discharge hole of the nozzle tip is formed in a slit shape, so that it is difficult to keep a sealed state of the discharge hole. The elastic force of the discharge hole may lose its elastic property by a long time use, so that the slit members may remain in the open state. It is preferred that the split portions of the discharge hole are closely contacted by means of constant pressure. However, when the pressure is not uniform, the discharge states of the content is also not uniform due to the discharge pressure, namely, it is slanted in one direction, so that it is impossible to obtain a uniform discharge direction in the above conventional art.

DISCLOSURE OF THE INVENTION

Accordingly, it is an object of the present invention to provide an airless dispensing pump container with an airtight push down type nozzle head capable of discharging a fixed amount of content which overcomes the problems encountered in the conventional art stated above.

It is another object of the present invention to provide an airless dispensing pump container with an airtight push down type nozzle head capable of discharging a fixed amount of content in which a vacuum sealing function is enhanced in the whole structure of the present invention, and a content opening and closing valve member of a content discharge part provided at a nozzle head is automatically opened and closed, along with a reliable discharge of the content, and a reverse flow and leakage are prevented by improving the structure of the content pump piston which sucks and transfers the content. When the pump cylinder is slanted at a certain angle along with the content storing container or in case of the content having high viscosity, it is possible to improve the operation errors of the ball valve by providing an inventive structure for the ball valve support installed at the lower side of the stem.

To achieve the above objects, there is provided an airless dispensing pump container with an airtight push down type nozzle head which comprises the content discharge part which is installed at the nozzle engaging hole of the nozzle head; the efficient content pump piston which is provided at an inner wall of the pump cylinder; and a ball valve support which is engaged at the lower side of the stem.

MODES FOR CARRYING OUT THE INVENTION

The preferred embodiment of the present invention will be described with reference to the accompanying drawings.

In an airless dispensing pump container with an airtight nozzle head of a push down type which includes a content storing container10for storing liquid content therein, a nozzle head20which is assembled at an upper side of the content storing container10and has a nozzle engaging hole21, a content compression piston30which is received in the content storing container10and is formed at a lower side, a pump cylinder31which is provided at a center portion, a pump cylinder cap32which is covered on an upper side of the pump cylinder31, a first content inlet hole33which is provided at a lower center of the pump cylinder31, a ball valve34which opens and closes the first content inlet hole33, a ball valve support shoulder35provided at a lower inner wall of the pump cylinder31, a nozzle head return spring40which is installed between the nozzle head20and the pump cylinder cap32, a pump piston shaft50which is fixedly assembled at an inner center of the nozzle head20and has a pump piston holder part51at a lower side, a step60which is fixed at a lower side of the pump piston shaft50and has a pump piston lower end contact surface61, a second contact inlet hole62, and a ball valve support guide rod insertion hole63, a pump piston70which is inserted into the stem60and includes an insertion part72sliding up and down as being inserted into the stem60, and a content opening and closing surface73formed at a lower surface, there is provided an airless dispensing pump container with an airtight nozzle head of a push down type which comprises a content discharge member100which is installed at a content discharge member engaging hole21of the nozzle head20; a ball valve support200which is engaged at a lower side of the stem60; and a content compression piston support shoulder300which is provided at an inner upper wall of the content storing container10.

The content discharge member100comprises a valve member support protrusion110which is integral with the nozzle head20and is positioned at the center of the content discharge member engaging hole21; a valve member cover body120which is fixedly inserted into the content discharge member engaging hole21and has a content discharge hole121at its front center portion; and a content opening and closing valve member130which is inserted into the valve member cover body120and is supported by means of the valve member support protrusion110.

The valve member cover body120comprises a plurality of ribs122formed in its inner surface at regular intervals; and a plurality of content flow groves123formed between the ribs22.

The content opening and closing valve member130comprises a content opening and closing plate121which is provided at its front side for opening and closing the content discharge hole121of the valve member cover body120; and a support plate132which is supported by means of the valve member support protrusion110.

The insertion part72of the pump piston70is formed in a “)(” shape in its cross section, with an intermediate portion of the same being defined as a first content discharge prevention surface701, with an upper surface portion being defined as a second content discharge prevention surface702.

The ball valve support200comprises a guide rod210which is inserted into a ball valve support guide rod insertion hole63of the stem60; a plurality of ball valve support ribs220which are provided at a lower side of the guide rod210; and a content path230which is provided between the ball valve support ribs220.

The operation and effects of the present invention will be described.

In the present invention, the input of an external air or foreign substance is basically prevented, so that oxidation or decay of the content is prevented.

In addition, a fixed amount of content is discharged. In a state that the content compression piston30and the nozzle head20are assembled at the content storing container10, a certain amount of content is inputted via the opened lower surface of the content storing container10, and the lower side of the same is capped.

In a state that the content is stored in the above manner, when the content is discharged, the content compression piston30and the nozzle head20move down by the height corresponding to the amount of the discharged content.

As shown inFIG. 1, in a state that the content is stored in the content storing container10, the upper wing portion of the content compression piston30supports the content compression piston support shoulder300, so that the content compression piston30moves up no more. When the content is filled in the content storing container10via the lower surface of the container housing, and the lower side of the same is capped with the lower container, a certain pressure generates in the container housing, and the content compression piston30moves up, and the return spring40is compressed, and the content opening and closing surface73of the pump piston70is open. So, it is possible to prevent the problems that the content of the pump cylinder31is first discharged to the content discharge hole131via the second content inlet hole62.

The content discharge member100is integrally formed with the nozzle head20, and the valve member support protrusion110is provided at the center of the content discharge member engaging hole21. As the valve member cover body120inserted with the content opening and closing valve member130is inserted into the content discharge member engaging hole21, the content discharge member100is stable fixed. The support plate132provided in a backside of the content opening and closing valve member130is supported by means of the valve member support protrusion110, so that the content opening and closing valve member130is stably fixed, while not moving and not being disengaged.

As shown inFIG. 1, the nozzle head20is fully moved up by the elastic force of the return spring40. In this state, the piston shaft50, the ball valve support200in which the guide rod210is inserted into the guide rod insertion hole63of the stem60, and the pump piston70are moved up, and the ball valve34closes the first content inlet hole33by the weight of the same. The pump piston lower contact surface61inserted into the stem60and the content opening and closing surface73of the pump piston70contact closely with each other for thereby closing the second content inlet hole62. The support rib220of the ball valve support200is supported by means of the ball valve support shoulder35, so that it does not move up.

FIG. 2shows a state that the nozzle head20is pressed for discharging contents. As the nozzle head20moves down, the piston shaft50moves down, and the return spring40is contracted, and the pump piston holder part51provided at the lower side of the piston shaft50moves down and closely contacts with the second content discharge prevention surface702formed on the upper surface of the insertion part72of the pump piston70. The first content discharge prevention surface701formed in a “)(”-shape by the pressure applied to the second content discharge prevention surface702is contracted in an arrow shape in the direction of the outer wall of the stem60and is closely contacted with the outer wall of the stem60. The second content discharge prevention surface702is expanded in an outward direction in an arrow direction T2and is closely contacted with an inner surface of the holder part51of the piston shaft50. The pump piston lower end contact surface61provided in the stem60and the content opening and closing surface73formed at the lower surface of the pump piston70are separated from each other, so that the content is inputted. The guide rod210of the ball valve support inserted into the guide rod insertion hole63formed at the stem60moves down along the stem60by the friction force of the guide rod insertion hole63, and the lower surface of the ball valve support200slightly presses the ball valve, so that the first content inlet hole33is reliably closed.

The content of the pump cylinder31is transferred to the second content inlet hole62formed in the stem60, and the transferred content is inputted into a plurality of content flow grooves123formed on the inner surface of the valve member cover body120. As the content opening and closing plate121closing the content discharge hole121formed in the valve member cover body120is forcibly opened by means of the discharge pressure of the content, so that the content is discharged. In a state that the nozzle head20is last moved down, the ball valve support200strongly pressurizes the ball valve34, so that the flow in the direction of the content storing container10is closed.

When the moved down nozzle head20is released after the content discharge is completed, the nozzle head20moves up by the return spring40. As the nozzle head20moves up, the ball valve support200moves up, and the ball valve34, which closed the first content inlet hole33, is open, and the content inputted into the first content inlet hole inputted by means of the suction pressure of the pump piston70is inputted into the pump cylinder via the content path230between the support ribs220formed at the ball valve support200. When the stem60starts moving up by means of the friction pressure between the content compression rib71of the pump piston70and the inner surface of the pump cylinder71, in a state that the pump piston70stops, the pump piston lower side contact surface61of the stem60is closely contacted with the content opening and closing surface73of the lower surface of the pump piston70for thereby closing the inlet of the contents. When the content of the content storing container10is inputted into the pump cylinder31, the content compression piston30moves down.

The content opening and closing plate121integrally engaged with the content opening and closing valve member130has an excellent elastic force and an excellent recovery force. When a recovery pressure of the content is not applied, it keeps tightly closing the content discharge hole121, and the sealing state is very excellent, so that the input of an external air and foreign substance is substantially closed, and it is possible to prevent an oxidation and decay or change in quality. In particular, the content opening and closing valve member130and the pump piston70are preferably made of medical rubber materials which have excellent durability, flexibility and recovery property and produce less environment hormone components.

As described above, the present invention is able to basically prevent the input of an external air or foreign substance with the help of special construction of a content discharge nozzle part while preventing a unnecessary leakage of content by improving the structure of the content pump piston. A reliable opening and closing operation of the ball valve can be obtained by adapting a ball valve support.