KR102125725B1 - Pump-dispenser for liquid bottle - Google Patents

Abstract

A pump dispenser according to the present invention includes: a cylindrical cap (210) mounted to a neck (110) of a container (100) in a screwing manner and having an open top; a cylinder (220) in which a lower end of the cap (210) is coaxially fitted and coupled to an upper end, a pressure chamber (221) for storing contents (A) is formed inside, and a suction tube (223) is inserted into a suction port (222) formed in a center of the bottom; a first check valve (230) for opening and closing the suction port (222) according to pressure changes in the pressure chamber (221) of the cylinder (220); a piston (240); a second check valve (250) for opening and closing a discharge passage (242) of a piston shaft (241); a fixed bushing (260); and a push head (270); a coil spring (280) having a lower end supported on a bottom of the fixed bushing (260) and the upper end supported on an upper surface of the push head (270) to elastically support the push head (270) in an upward direction. Accordingly, various cylinder sizes are applied, and foreign substances are prevented from entering an upper space of the cylinder.

Description

Pump dispenser {PUMP-DISPENSER FOR LIQUID BOTTLE}

The present invention relates to a pump dispenser; More specifically, it relates to a "pump dispenser" mounted on a container containing liquid contents and capable of suctioning/pumping liquid contents and discharging them to the outside by repeatedly pressing the push head.

In general, a container for storing liquid or paste-like cosmetics or other liquid contents, such as shampoo, rinse, syrup, etc., is equipped with a pump dispenser (PUMP-DISPENCER) that can be used to discharge a certain amount of contents through air pressure. .

As shown in FIG. 1, the conventional pump dispenser is coupled to the neck of the container 10, and the pumping unit 20 is provided with a pressure chamber 22a to suck/pump liquid contents and temporarily store them, and this pumping unit ( It is equipped with a push head 30 provided with a discharge passage 31 for discharging the pumped liquid contents to the outside while applying pressure to the pressure chamber 22a of 20).

The pumping unit 20 is a cylinder 22 having a large cap 21 mounted in a screwed manner on the neck of the container 10 and coaxially disposed inside the center of the large cap 21 and having a pressure chamber 22a formed therein. Wow, the ball valve 24 disposed at the inlet 23 at the bottom of the cylinder 22, the coil spring 25 installed in the pressure chamber 22a of the cylinder 22, and the lower end inside the cylinder 22 are accommodated. The piston piston 26, which is movable to move up and down and is elastically supported through the coil spring 25, is disposed to surround the lower end of the piston shaft 26, and the edges are in close contact with the inner wall of the cylinder 22. ), and is fixedly coupled to the upper end of the cylinder 22 that extends upward through the upper surface of the large cap 21 and has a fixed bushing 28 formed with an internal thread 28a on the inner wall. And the push head 30 is fitted to the upper end of the piston shaft 26, the lower portion of which is fastened to the female screw 28a of the fixed bushing 28 to form a male screw 32 that can be kept in a locked state. have.

In the conventional pump dispenser configured as described above, the push head 30 is pressed by hand; While winning the elastic force of the coil spring 25, the piston shaft 26 descends, whereby the liquid content filled in the pressure chamber 22a of the cylinder 22 flows into the inner space of the piston shaft 26, and continues It is discharged to the outside through the discharge passage 31 of the push head 30. At this time, the ball valve 24 is in contact with the inlet 23 by the pressure drop of the contents inside the cylinder 22 to block communication between the pressure chamber 22a and the inside of the container 10. And when the hands off the push head 30; As the piston shaft 26 rises due to the elastic support force of the coil spring 25, the discharge of the contents is blocked and a vacuum is formed in the pressure chamber 22a of the cylinder 22. Therefore, part of the liquid contents stored in the container 10 is filled by being sucked into the pressure chamber 22a again while raising the ball valve 24. At this time, the outside air is introduced into the container 10 through the air hole 29 perforated to the wall surface of the cylinder 22 to fill the space as much as the contents have escaped. The liquid content in the container 10 is constantly discharged through the operation of repeatedly pressing the push head 30.

However, in this vertical pump dispenser, as shown in FIG. 1, since the lower portion of the cylinder 22 with the air hole 29 perforated is deeply received to the inside of the container 10, in designing the cylinder 22 according to the discharge amount There is a disadvantage that must consider the size of the container 10. In addition, in the conventional pump dispenser, foreign matter, such as water, can enter the cylinder 22 through the gap between the fixed bushing 28 and the piston shaft 26, which continues through the air hole 29 to the container 10. You can go inside and deteriorate the contents. This phenomenon is because the fixed bushing 28 for preventing the piston shaft 26 from coming off is made of a configuration exposed to the outside.

The present invention is to solve this problem; An object of the present invention is to provide a "pump dispenser" capable of variously applying a cylinder size without considering the container by improving the cylinder and piston structure so that it is not accommodated inside the container containing the contents and is located above the cap. .

In addition, another object of the present invention is to provide a "pump dispenser" capable of preventing foreign matter from entering the space above the cylinder by improving the structure in which external air flows according to the discharge of contents.

The present invention for achieving this object; A pump dispenser mounted on the neck of the container and capable of suction-pumping the liquid contents and discharging it to the outside;

The pump dispenser; A cap of a cylindrical shape mounted on the neck of the container by a screw coupling method and having an open top; The lower end is coaxially fitted to the upper end of the cap, and a pressure chamber in which the contents are sucked and temporarily stored is formed, and a cylinder through which the suction tube is fitted into the suction port formed in the center of the floor; A first check valve installed inside the suction port of the cylinder and opening and closing the suction port according to a change in pressure in the pressure chamber of the cylinder; As the edge is in close contact with the inner wall of the cylinder, the piston shaft formed in the longitudinal direction of the discharge passage in the center of the bottom is provided so as to protrude upward, and on one side of the bottom an air pipe for guiding external air inflow A piston provided to extend downward through a through hole drilled in one side of the floor; A second check valve which is installed above the piston shaft of the piston and opens and closes the discharge passage of the piston shaft according to a pressure change in the pressure chamber of the cylinder; The outer wall is fitted to the open upper part of the cylinder in an interference fit, and a cylindrical guide wall is provided in the center of the piston, while the piston shaft of the piston penetrates the gap, while preventing the piston from disengaging from the cylinder. A fixed bushing for guiding the lifting of the piston shaft; A push head provided integrally with the upper end of the piston shaft of the piston, the inside being provided with an outlet for communicating with the discharge passage of the piston shaft, and a lower part having a cylindrical waterproof wall surrounding the upper part of the cylinder from the outside; The lower end is supported by hanging on the bottom of the fixed bushing, the upper end is supported by the upper surface of the push head, the coil spring elastically supporting the push head in an upward direction integrally with the piston; It is characterized by having.

In addition, the present invention; It characterized in that the band-shaped engaging projection protrudes on the inner wall of the upper end of the cap, and the engaging groove is formed in a band-like shape so that the engaging projection is restrained on the lower outer wall of the cylinder.

According to the pump dispenser according to the present invention made of the above configuration; Since the cylinder where the pressure chamber is formed is located at the top of the cap, there is an advantage that various cylinders according to the discharge amount can be applied without considering the container size. In addition, since the fixed bushing for preventing the piston from being displaced is arranged to be accommodated in the upper portion of the cylinder and is wrapped through a waterproof wall, there is an effect of preventing foreign matter from entering the upper space of the cylinder from the outside.

In addition, in the pump dispenser according to the present invention, the lower end of the cylinder is reliably coupled to the upper end of the cap through a band-shaped coupling protrusion and a coupling groove, thereby facilitating assembly thereof.

1 shows a conventional pump dispenser.
2 is a perspective view showing a state in which the pump dispenser according to the present invention is applied to a container.
3 is a cross-sectional view showing a state in which the pump dispenser according to the present invention is applied to a container.
4 is a cross-sectional view showing the overall structure of the pump dispenser according to the present invention.
5 is an exploded cross-sectional view showing the internal structure of the pump dispenser according to the present invention.
6 is an exploded perspective view showing the configuration of a pump dispenser according to the present invention.
7 and 8 sequentially show the pumping operation of the waterproof pump dispenser according to the present invention.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Briefly explaining the attached drawings, FIGS. 2 to 6 show the configuration of the pump dispenser according to the present invention, and FIGS. 7 and 8 show the operating state of the pump dispenser according to the present invention.

<Configuration description of the pump dispenser according to the present invention>

2 and 3, the pump dispenser 200 according to the present invention is assembled to the neck 110 of the container 100 to suck/pump the liquid contents filled therein by a predetermined amount to eject it to the outside. To be; The cap 210 is assembled to the neck 110 of the container 100 by a screw coupling method, and the cylindrical cylinder 220 and the cylinder 220 disposed on the cap 210 and having a suction port 222 at the bottom are formed. ) The first check valve 230 that selectively opens and closes the intake 222 of the inlet, and the piston 240 provided to be raised and lowered inside the cylinder 220 and the hollow piston shaft 241 protrudes upward at the center of the floor. And, the second check valve 250 to open and close the upper portion of the piston shaft 241, the fixed bushing 260 coupled to cover the open upper portion of the cylinder 220, and the piston shaft 241 is inserted into the top and integral It is equipped with a coil head 280 elastically supporting the push head 270 and the push head 270 provided with an outlet 271 and descending while descending. Components constituting the pump dispenser according to the present invention are all formed through synthetic resin except for the coil spring 280 and the first check valve 230 and the second check valve 250, and detailed structures thereof are shown in FIG. 4. Referring to Figure 6 as follows.

First, the cap 210 is mounted on the neck 110 of the container 100 containing the liquid content (A) by a screw coupling method, as shown in FIGS. 4 to 6, the inner wall of the cap 210 has a female screw (211) is processed. In addition, the cap 210 is made of a cylindrical shape with an open top, and an engaging top 212 in the form of a belt is formed to protrude on the inner upper wall of the cap 210. The engaging projection 212 is for forcibly fitting the lower end of the cylinder 220 through the engaging groove 225 described later.

The cylinder 220 is a tubular body in which the lower end of the cap 210 is coaxially fitted and installed, and a pressure chamber 221 in which the liquid content A is sucked and temporarily stored is provided. In addition, in the center of the bottom of the cylinder 220, a suction port 222 into which the suction tube 223 is fitted for suctioning the contents is formed to protrude downward. In addition, the coupling groove 225 is formed in a band shape on the outer wall of the lower end of the cylinder 220. Therefore, when the lower end of the cylinder 220 is coupled to the opened upper part of the cap 210 in a forced fit, the coupling protrusion 212 is securely seated and coupled along the coupling groove 225, and at the same time, the cylinder 22 has a cap ( 210) It is integrated while forming a coaxial upper portion.

The first check valve 230 is to selectively open and close the suction port 222 of the cylinder 220, and is made of steel balls in the embodiment of the present invention, and the pressure of the pressure chamber 221 according to the raising/lowering operation of the piston 240 Depending on the change, the inlet 222 is selectively opened and closed.

The piston 240 is arranged to move up and down while the edges are in close contact with the inner wall of the cylinder 220, and the piston shaft 241 having a discharge passage 242 formed therein in the longitudinal direction is provided to protrude upwards at the center of the floor. On one side of the floor, an air pipe 243 for guiding external air inflow is provided to extend downward. The piston shaft 241 is positioned to extend above the cylinder 220, and the discharge passage 242 inside communicates with the pressure chamber 221 of the cylinder 220. In addition, the air pipe 243 extends downward through a through hole 224 drilled on one side of the bottom of the cylinder 220, thereby communicating with the inside of the container 100. The air pipe 243 is configured to move up and down while being in close contact with the through-hole 224, and it is preferable to prevent the contents A from leaking or entering into these gaps.

The second check valve 250 is installed on the upper part of the piston shaft 241 (the upper end of the discharge flow path), and selectively selects the discharge flow path 242 of the piston shaft 241 to change the pressure in the pressure chamber 221 of the cylinder 220 Will be opened and closed. In the embodiment of the present invention, the second check valve 250 is also made of steel balls. On the other hand, of course, the first check valve 230 and the second check valve 250 can be applied to a plate-shaped check valve made of synthetic resin in addition to steel balls.

The fixed bushing 260 is coupled to the outer top of the cylinder 220 in the form of a forced fit, and the inner center has a cylindrical guide wall through which the piston shaft 241 of the piston 240 maintains a gap therebetween ( 261). Therefore, the departure of the piston 240 from the cylinder 220 is prevented, and the piston shaft 241 can be moved up and down while being guided through the guide wall 261.

The push head 270 is actually pushed by a user, and is inserted into the upper end of the piston shaft 241 that extends upward through the guide wall 261 of the fixed bushing 260 and is fitted in a forced fit manner. The upper portion of the push head 270 is provided with an outlet 271 communicating with the discharge passage 242 of the piston shaft 241. The push head 270 integrally moves up and down with the piston shaft 241, and the content A pumped through the discharge passage 242 is discharged to the outside through the outlet 271. In addition, a waterproof wall 272 having a cylindrical shape surrounding an upper portion of the cylinder 220 is provided at a lower portion of the push head 270. Therefore, since the lower portion of the waterproof wall 272 surrounds the upper portion of the cylinder 220 during the lowering operation of the push head 270 as well as during the maximum rise, foreign substances are not introduced into the cylinder 220.

The coil spring 280 is for elastically supporting the push head 270 in an upward direction to raise the piston 240 together with the push head 270, and the outer side of the piston shaft 241 exposed to the top of the cylinder 220 It is installed to wrap. That is, the lower end of the metal coil spring 280 is supported on the bottom of the fixed bushing 260, and its upper end is supported on the upper surface of the push head 270.

<Description of the operation and effect of the pump dispenser according to the present invention>

Next, the operation of the pump dispenser according to the present invention configured as described above and the effect thereof will be described with reference to FIGS. 3 and 7 and 8.

First, in the initial state of the pump dispenser 200, as shown in FIG. 3, the push head 270 and the piston 240 by the coil spring 280 are raised upward (in an elevated state), and the cylinder ( In the pressure chamber 221 of 220), a small amount of liquid content sucked is stored.

In this state, when the push head 270 is pressed, as shown in FIG. 7, the coil spring 280 is compressed and guided through the guide wall 261 of the fixed bushing 260 while the piston shaft 241 is lowered. Goes. As the piston shaft 241 and the piston 240 descend, the liquid content A of the pressure chamber 221 exits into the discharge passage 242 of the piston shaft 241, and continues to exit the push head 270. It is ejected to the outside through 271 (refer to the solid arrow direction in FIG. 7 ). As the internal pressure of the pressure chamber 221 increases when the piston 240 descends, the first check valve 230 is maintained in a closed state while the second check valve 250 is a discharge flow path. 242 remains open.

And when the push head 270 is released, as shown in FIG. 8, the push head 270 and the piston shaft 2410 and the piston 240 are raised by the elastic restoring force of the coil spring 280. At this time, the liquid content A stored in the container 100 flows into the pressure chamber 221 of the cylinder 220 while opening the first check valve 230 (refer to the solid arrow direction in FIG. 8 ). That is, when the piston shaft 241 and the piston 240 gradually rise due to the restoring force of the coil spring 280, a vacuum pressure is applied to the pressure chamber 221 of the cylinder 220. Therefore, the second check valve 250 descends to close the discharge passage 242 of the piston shaft 241, and the first check valve 230 slightly opens at the suction port 222. Due to this, the liquid content A in the container 100 is sucked into the pressure chamber 221 through the suction tube 223 and the suction port 222 (see the solid arrow direction in FIG. 8 ). In addition, in the process in which the liquid content (A) in the container 100 is sucked into the pressure chamber 221, the external air is introduced into the container 100 through the air tube 243 of the piston 240 (dashed line in FIG. 8). Arrow direction), the contents (A) is smoothly inhaled. The external air inflow is made until the piston 240 is completely raised and reaches the fixed bushing 260. As described above, by repeating the pressing operation of the push head 270, the liquid content A contained in the container 100 can be pumped and used.

As described in detail above, in the present invention, as well as the vertical movement of the push head 270, the waterproof wall 272 of the push head 270 surrounds the upper portion of the cylinder 220 from the outside even in an elevated state. It is possible to block the inflow to the cylinder 220 side. In addition, the piston shaft 241 is made of smooth and accurate movement through the guide wall 261 of the fixed bushing 260, it is possible to operate by pressing the push head 270 lightly. In particular, since the fixed bushing 260 is accommodated and installed at the upper end of the cylinder 220, it is possible to prevent the piston 240 from leaving without damaging the product appearance.

In addition, in the present invention, since the cylinder 220 in which the pressure chamber 221 is formed is located above the cap 210, various cylinders 220 according to the discharge amount can be applied without considering the size of the container 100, The lower end of the cylinder 220 is reliably coupled to the upper end of the cap 210 through the band-shaped coupling protrusion 212 and the coupling groove 225 to facilitate assembly thereof.

100..Container 110..Neck A..Liquid contents
200..Pump dispenser 210..Cap 211..Female thread
212..Coupling projection 220..Cylinder 221..Pressure chamber
222..Suction port 223..Suction tube 224..Through hole
225..Combination groove 230..First check valve 240.Piston
241..Piston axis 242..Emission passage 243..Air tube
250.. 2nd check valve 260.. Fastening 261.. Guide wall
270..Push head 271..Outlet 272..Water barrier
280..coil spring

Claims (2)

A pump dispenser mounted on the neck 110 of the container 100 and capable of suction pumping the liquid contents A and discharging it to the outside;
The pump dispenser 200;
A cylindrical cap 210 mounted on the neck 110 of the container 100 in a screw-coupled manner and having an open top;
The lower end is coaxially fitted to the upper end of the cap 210, and a pressure chamber 221 for temporarily storing the contents A is suctioned therein and the suction tube 223 at the suction port 222 formed in the center of the floor ) Is fitted with a cylinder 220;
A first check valve 230 installed inside the suction port 222 of the cylinder 220 and opening and closing the suction port 222 according to a pressure change in the pressure chamber 221 of the cylinder 220;
The cylinder 220, the edge is in close contact with the inner wall, and descends, the discharge center 242 is provided with a piston shaft 241 formed in the longitudinal direction therein protruding upwards, and the outside air is introduced into the bottom side. An air pipe 243 for guiding a piston 240 provided to extend downward through a through hole 224 drilled at one side of the bottom of the cylinder 220;
A second check valve installed on the piston shaft 241 of the piston 240 and opening and closing the discharge passage 242 of the piston shaft 241 according to the pressure change in the pressure chamber 221 of the cylinder 220 ( 250) and;
A cylindrical guide wall 261 through which an outer wall is fitted and fitted into the open upper portion of the cylinder 220 is inserted into the center, and the piston shaft 241 of the piston 240 penetrates while maintaining a gap therebetween. A fixed bushing 260 provided to guide the up and down movement of the piston shaft 241 while preventing the piston 240 from being detached from the cylinder 220;
The piston 240 is fitted to the upper end of the piston shaft 241 and is integrally raised and lowered, and an outlet 271 communicating with the discharge passage 242 of the piston shaft 241 is provided inside, and the cylinder ( A push head 270 having a cylindrical waterproof wall 272 surrounding the upper portion of the 220);
The lower end is supported by hanging on the bottom of the fixed bushing 260, the upper end is supported by the upper surface of the push head 270, and the push head 270, which moves up and down integrally with the piston 240, is elastic in the upward direction. A supporting coil spring 280; Pump dispenser, characterized in that provided. According to claim 1,
On the inner wall of the opened upper portion of the cap 210, a band-shaped engaging projection 212 is formed to protrude;
The pump dispenser, characterized in that the coupling groove 225 is formed in the form of a belt so that the engaging projection 212 is forcibly fitted to the lower outer wall of the cylinder 220.

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