KR20040039526A - Finger-operated spray pump - Google Patents

Abstract

PURPOSE: A manual injection pump for discharging constant amount of content in the pump at one time is provided to possess improved recovery ability of piston after pumping as well as accomplishment of reduced failure rate together with easy production thereof. CONSTITUTION: The injection pump comprises an actuator, a pumping chamber and a closed part(300), a piston(220) having top end insertion part(260) coupled to lower portion of the actuator and a housing(210) fitted with a tube at bottom end thereof. The pumping chamber includes a housing(210), the piston(220), a poppet valve(230) and a spring(250). Content in a container is entered into the housing(210), passes through a flow-passage(261) of the piston(220) then introduced into the actuator. A dimpled concave part is formed outside the bottom end of a lower side extension part(232) of the poppet valve(230). Projection part is formed corresponding to the above concave part outside the top end of an inner duct(215) of the housing(210).

Description

Manual Injection Pump {FINGER-OPERATED SPRAY PUMP}

The present invention relates to a manual injection pump in which a certain amount is injected during one pumping, and more particularly, to integrate the poppet valve and the sliding seal constituting the inside of the pump and to change their structure and the structure of the housing, By including a first spring providing a restoring force to the valve and a second spring providing a restoring force to the piston, the injection pump is easy to manufacture and has a low defect rate, and excellent in the restoring force of the piston after pumping.

Manual injection pumps are used as upper lids of liquid containers, such as metal cans, glass bottles or plastic bottles, and in particular, liquid materials used in storage containers containing liquids such as perfumes, hair sprays, deodorants and neck sprays. As the injection device of, has the advantage of overcoming the hassle of opening and closing the lid of the container, the difficulty of spraying a certain amount. Moreover, since the contents are continuously kept sealed in the storage container, there is an advantage that there is no possibility of drying or deterioration due to infiltration of foreign matter from the outside.

A representative example of such a manual injection pump is disclosed in US Pat. No. 5,277,559. Referring to Figure 1, the configuration and operation principle of the injection pump of the US patent as a prior art as follows.

As shown in FIG. 1, the conventional manual injection pump is largely composed of an actuator 100, a pump chamber 200, and a sealed part 300.

The actuator 100 has a piston 220 in which a liquid passage is formed therein, and is mounted at the bottom thereof, and has an insert nozzle (not shown) connected to the passage inside the piston 220.

The pump chamber 200 is mounted to the housing 210 and the actuator 100 to form an exterior, and the piston 220 to reciprocate in the housing 210 and the poppet valve 230 mounted to the inside of the piston 220. ), A sliding seal 240 in contact with the inner surface of the housing 210 and positioned below the poppet valve 230, and a spring 250 located between the sliding seal 240 and the lower portion of the housing 210. . The sliding seal 240 is axially arranged on the lower portion of the housing and on the poppet valve 230, and is assembled to move with the poppet valve 230. A tube (not shown) extends to the bottom of the vessel containing the liquid contents and connects to the bottom of the pump. Spring 250 is fixed in the pump chamber 200, the lower end of the spring 250 is mounted to the housing lower space, the upper end is mounted to the pin extending downward from the poppet valve 230, respectively. The sealing part 300 is coupled to the corresponding part of the housing 210 and the piston 220 with the liner 310 mounted thereon to prevent the liquid in the container from leaking out.

The operation principle of the manual injection pump of such a structure will be described with reference to FIGS. 1 and 2 as follows.

When the actuator 100 is depressed, the force is transmitted to the poppet valve 230 and the sliding seal 240 through the piston 220, so that they descend. At this time, the downward inclined surface 231 positioned under the poppet valve 230 is in close contact with the inner protrusion 241 of the sliding seal 240, and the outer downward inclined surface 242 of the sliding seal 240 is the housing protrusion 212. It will be in close contact with the upward inclined surface 213 of. If the poppet valve 230 continues to descend, the inner surface protrusion 241 of the sliding seal 240 slides on the outer surface 2310 beyond the downward inclined surface 231 of the poppet valve 230. Since the outer surface 2310 of the poppet valve 230 and the inner surface protrusion 241 of the sliding seal 240 remain in close contact, the upper space A of the housing 210 is closed with the lower space B. The state remains. Accordingly, the content in the upper space A is pressurized by the continuous lowering of the poppet valve 230. When the pressurized contents are able to withstand the force of the spring 250, where the piston 220 and the poppet valve 230 is in contact with each other, the contents are opened to the actuator 100 through such open spaces. .

Meanwhile, when the force applied to the actuator 100 is removed, the piston 220, the poppet valve 230, and the sliding seal 240 are raised. At this time, the open space of the piston 220 and the poppet valve 230 is closed again by the restoring force of the spring 250, the outer inclined downward surface 242 of the sliding seal 240 and the upward inclined surface of the housing protrusion 212 The close contact of the 213 is released, and the upper space A and the lower space B of the housing 210 are opened through the flow passage 243 of the sliding seal 240. The rise of the sliding seal 240 continues only until the outer upwardly inclined surface 244 of the sliding seal 240 contacts the downwardly inclined surface 214 of the housing protrusion 212, and then the two elements 244, 214 are in contact. The outer surface 2310 of the poppet valve 230 continuously rises in contact with the inner protrusion 241 of the sliding seal 240, and finally closes when the downward inclined surface 231 is reached. Therefore, in order to compensate for the pressure drop in the housing upper space A, the contents of the housing lower space B are introduced through the flow passage 243 of the sliding seal.

In the manual injection pump of the structure and the principle of operation, as described above, the configuration of the poppet valve 230 and the sliding seal 240 and the housing protrusion 212 which performs a sealing / opening process with them is particularly important. Do. However, in the plastic injection process, it is not easy to mold the protruding portion deep inside the inner surface, such as the housing protrusion 212, into a shape as designed, especially in a very small product such as a manual injection pump. That is, the operation of the pump may not be made even with a small error of the molding. For example, when the protruding height of the housing protrusion 212 is slightly lower than the design value, the downwardly inclined surface 241 of the outer surface of the sliding seal 240 when the sliding chamber 240 descends may have an upwardly inclined surface () of the housing protrusion 212. 213 may not remain in close contact with each other and may extend beyond the protrusion 212. If so, the pumping process described above cannot be carried out. Checking whether the protrusion 212 is defective after manufacturing the product also has a problem that is not easy. In addition, although the upward restoring force after the pumping is provided by the spring 250, there is a friction force between the sliding seal 240 and the housing 210, so that the piston 220 is not easily restored after the pumping, which is inconvenient to use. have. On the other hand, in the case of a product completed by assembling a number of parts, the smaller the number of parts is very advantageous in terms of manufacturing process and assembly process.

Therefore, there is a strong demand for a new injection pump that can solve the above problems at once.

The present invention aims to solve these problems of the prior art and technical problems that have been requested from the past.

That is, an object of the present invention is to provide a manual injection pump which is easy to manufacture by significantly improving the shape of the housing and the poppet valve and the product defect rate is significantly low.

The present invention also aims to reduce the manufacturing cost of the product by simplifying the overall configuration by not constituting the sliding seal as a separate part, making it easier to manufacture, significantly lowering the defective rate of the product, and reducing the number of assembly processes. .

It is also an object of the present invention to provide a configuration of a pump in which a single discharge amount is different at the time of pumping by changing only the length of a specific component without changing the overall configuration of the pump.

Furthermore, it is an object of the present invention to provide an injection pump which is very convenient to use since the piston is easily restored after pumping.

1 is a vertical sectional view of a state in which a downward force is applied and a state in which a conventional manual injection pump is not applied;

FIG. 2 is a vertical sectional view showing the operation of the sliding seal in the injection pump of FIG. 1; FIG.

3 is a vertical sectional view of the manual injection pump according to one embodiment of the present invention without a downward force applied thereto;

FIG. 4 is a vertical sectional view of the injection pump of FIG. 3 under downward force; FIG.

5 is an enlarged view of a portion W of FIG. 3;

FIG. 6 is an enlarged view of portion X of FIG. 3;

7 is an enlarged view of a portion Y of FIG. 4;

8 is an enlarged view of a portion Z of FIG. 4;

9 is a vertical sectional and bottom view of a poppet valve according to one embodiment of the present invention;

FIG. 10A is a cross-sectional view showing the flow of fluid contents in a state where the downward force is removed in a manual injection pump according to one embodiment of the present invention; FIG.

FIG. 10B is a cross-sectional view showing the flow of fluid contents when a downward force is applied in the injection pump of FIG. 9.

Explanation of symbols for the main parts of the drawings

100: actuator 200: pump room

210: housing 220: piston

230: poppet valve 240: sliding seal

250: spring 300: sealing part

In order to achieve this object, the manual injection pump of the present invention,

A manual injection pump comprising an actuator mounted on the top of the pump and injecting the contents, a pump chamber that sucks the contents in the container and supplies it to the actuator, and a sealing portion that mounts the pump chamber in the container and seals the pump chamber from the outside.

The pump chamber has a housing that forms the exterior of the pump chamber, a piston which is fastened to the lower portion of the actuator and reciprocates along the inner surface of the housing and has an axial flow passage therein, and a rod for opening and closing the flow passage of the piston. And a second spring positioned between the lower portion of the housing and the poppet valve, and a second spring positioned between the lower portion of the piston and the poppet valve.

The poppet valve has a lateral extension extending downward to a predetermined length on which the lower portion of the second spring is placed, and the lower portion of the poppet valve flows into an inner tube of the lower housing and fastens the upper portion of the first spring therein. A lower surface extension portion, wherein the lower surface extension portion has one or more recesses having a groove shape of a predetermined length,

The housing is configured to include a housing inner tube with a first spring located therein and extending upwardly from the inlet.

In the manual injection pump of the present invention, the pump is introduced into the pump chamber by a process of the lower surface extension of the poppet valve and the inner tube of the housing in close contact / separation during pumping, so that the pump is sent to the actuator. Do not need. More specifically, when the downward force is applied to the actuator for pumping, the lower surface of the poppet valve closes the inside of the housing by the process of being inserted while being in close contact with the housing inner tube, and conversely, when the downward force applied to the actuator is removed. The contents of the container enter through the inlet of the lower part of the housing through the spaced gap between the recess on the lower surface of the poppet valve and the upper end of the housing inner tube.

Therefore, the outer diameter of the lower surface extension of the poppet valve should be approximately equal to the inner diameter of the inner tube of the housing, and the recess on the lower surface of the extension should have a groove enough to be spaced apart from the inner diameter of the inner tube of the housing.

The length of the concave portion is a length such that the above process can be made, but may vary slightly depending on the discharge amount during pumping, it is about 0.5 to 1.0 mm.

The shape of the housing inner tube may be simply a cylindrical structure, and in some cases, may be a cylindrical structure in which protrusions corresponding to recesses on lower surface extensions of the poppet valve are formed inside the upper end of the inner tube. Even in the latter case, there should be a spaced inflow gap between the concave on the lower surface extension and the inner tubular protrusion without the downward force being applied to the actuator so that the pumping operation can be smoothly performed. Particularly preferably, the concave portion is uniformly located along the outer circumferential surface of the lower surface extension portion, and the corresponding projection portion is located on the inner surface of the inner tube.

The lateral extension of the poppet valve extends downward by a constant length as described above. Therefore, the overall cross-sectional shape (right side) has a mutually opposite "a" shape in which the horizontal portion and the vertical portion are combined. The horizontal portion of the extension is not completely in contact with the inner surface of the housing and therefore does not prevent the contents from moving over the housing. Preferably, one or more guide protrusions are provided on part or all of the outer surface of the side part. That is, it is possible to induce the poppet valve to move stably in close contact with the inner surface of the housing without disturbing the distribution of the contents through the space between the guide protrusions. In particular, the presence of the induction protrusion serves to help the lower surface extension of the poppet valve to reciprocate into the inner tube of the housing in a fixed state when pumping. The lower end of the vertical part is brought into contact with the horizontal plane of the housing when the poppet valve is fully lowered. Meanwhile, the pumping distance may vary depending on the overall length of the housing and the length of the vertical portion of the poppet valve side extension. Therefore, it is possible to easily adjust the pumping amount once by changing the length of the housing and the length of the side extension without changing the overall structure of the pump. This effect is one of the important advantages of the present invention, compared with the fact that the structure of the entire pump must be changed in order to adjust the pumping amount in the conventional manual injection pump. Therefore, the manual injection pump of the present invention can be used for injection pumps of various discharge amounts, such as 50 mcl (1 mcl = 1/1000 cc) to 200 mcl.

On the other hand, one of the features of the present invention is that by using two springs, the pumping process and the recovery process after pumping is excellent. In the injection pump such as the present invention, when the actuator is pressed (by applying downward force) to pump and then the downward force applied is removed, the actuator is automatically restored to the next process, that is, pumping or ready to use again. Come back. This restoration process is provided by the restoring force of the spring, which is generally slowed down by a number of frictional sites present in the injection pump. When using a spring of high elasticity to provide an excellent recovery process, there is a problem that the pumping process is not excellent, such as a large downward force should be applied. On the other hand, the present invention provides a better pumping and restoring process by placing a second spring between the piston and the poppet valve in addition to the first spring located between the housing bottom and the poppet valve.

In order to help the understanding of the present invention, the following describes the configuration and operation principle of the invention with reference to the preferred embodiment of the present invention, but these embodiments should not be construed to limit the scope of the present invention.

3 and 4 illustrate a fully raised state and a lowered state of the piston and the like in the manual injection pump according to the exemplary embodiment of the present invention, respectively. The injection pump of the present invention is composed of an actuator (not shown), a pump chamber (not shown), and a closed part 300 (only a part of which is shown) and the like, and an upper insertion part of the piston 220 at the lower part of the actuator ( 260 is fastened and a tube (not shown) is inserted into the bottom of the housing 210.

The pump chamber includes a housing 210, a piston 220, a poppet valve 230, and a spring 250 as main components. The contents in the container (not shown) flow into the interior of the housing 210 through the tube and ascend to the actuator via the flow path 261 of the piston 220.

On the other hand, Figure 5 shows the configuration (W) between the lower end of the lower surface extending portion 232 of the poppet valve 230 and the inner tube 215 of the housing 210 in the pump state of FIG. Groove-shaped recesses 2320 are formed on the outer surface of the lower surface of the lower end portion 232, and protrusions 2150 are provided on the outer surface of the upper end of the inner tube 215 corresponding to the recesses 2320. The recesses 2320 and the protrusions 2150 are slightly spaced apart so that the contents are introduced into the pump chamber 200 through the gaps.

FIG. 6 shows a configuration X in which the flow path 261 of the upper insert 260 of the piston 220 is sealed by the rod 236 of the poppet valve 230 in the pump state of FIG. 3. The configuration X is opened only when the piston 220 and the poppet valve 230 start lowering and reach a considerable degree as the pressure inside the housing 210 rises. When the contents pressurized by the opening of the configuration (X) exits the flow passage 261 and the internal pressure of the housing 210 decreases, the piston 220 and the poppet valve 230 reach the peak of the lowering. Even at this time, the first spring 250 is closed again by the restoring force of the first spring 250.

FIG. 7 illustrates a configuration Y between the lower surface extension 232 and the side extension 234 of the poppet valve 230 and the inner tube 215 of the housing 210 in the pump state of FIG. 4. The lateral extension portion 234 is composed of a horizontal portion 2341 extending horizontally from the lower surface extension portion 232 and a vertical portion 2342 extending vertically downward from the horizontal portion 2341. A plurality of guide protrusions 2343 protruding toward the housing 210 are attached to the vertical portion 2342. In FIG. 7, the guide protrusion 2343 is shown to have a slight gap between the inner surface of the housing 210, but in some cases, the guide protrusion 2343 is almost in close contact with the inner surface of the housing 210. It can be configured to slide in a state.

7, the lowering of the poppet valve 230 (including the lowering of the piston or the like) is such that the lower end of the vertical portion 2234 of the lateral extension 234 is the horizontal portion 214 of the housing 210. It stops when it reaches. In some cases, the vertical portion 2342 may not be separately installed. In this case, the lowering of the poppet valve 230 is horizontal when the upper end of the inner tube 215 of the housing 210 is horizontal. It stops when it reaches the bottom of the portion 2341. However, since the material thickness of the inner tube (215) is thinner than the vertical portion (2342), it is not preferable because it is likely to be damaged when frequent pumping or excessive force during pumping.

When the poppet valve 230 descends, the inner tube 215 of the housing 210 is in contact with the outer surface 2322 of the lower extension 232 beyond the recess 2320 of the lower extension 232. It slips. If the protrusion 2150 is attached to the upper end of the inner tube 215, the protrusion 2150 is beyond the concave portion 2320 of the lower extension portion 232 to its outer surface 2322 as in the above process. It slips. Due to the elasticity of the plastic, which is a material of the poppet valve 230 and / or the housing 210, the sliding motion in the closed state may be smoothly performed.

FIG. 8 shows a configuration Z of the piston 220 and the poppet valve 230 in the pump state of FIG. 4. The second spring 252 is located between the lower surface of the piston 220 and the horizontal portion 2231 of the horizontal extension 234 of the poppet valve 230. In the state where the actuator is not pressurized, the second spring 252 is relaxed, and is compressed when the actuator is pressurized. When the downward force applied to the actuator is removed, the poppet valve 230 is raised by the restoring force of the first spring 250, and as shown in FIG. 6, the upper inserting portion 260 of the piston 220 is removed. The flow path 261 is closed by the rod 236 of the poppet valve 230. In this closed state, the poppet valve 230 continuously rises and the piston 220 also rises. However, due to the friction force between the piston 220 and the inner surface of the housing 210, it is difficult to quickly restore the piston 220. Therefore, in the state where the downward force applied to the actuator is removed, the piston 220 is assisted by the restoring force of the second spring 252, so that the restoring is performed quickly.

In Fig. 9 one exemplary configuration of a poppet valve for use in the present invention is shown as a vertical cross section and a bottom view. The poppet valve 230 has a rod 236 inserted into the piston 220 at an upper portion thereof and a space 238 into which a portion of the spring 250 is inserted is disposed at a lower portion thereof. The space portion 238 includes a lower surface extension 232 and a side extension 234, and the side extension 234 includes a horizontal portion 2341, a vertical portion 2234, and a guide protrusion 2343. Doing. A plurality of recesses 2320 are evenly positioned along the circumferential surface of the lower surface extension part 232, and a plurality of guide protrusions 2320 are radially evenly disposed along the circumferential surface. The length of the recessed part 2320 and the length of the vertical part 2342 can be changed suitably according to one pumping amount etc. as mentioned above.

10A and 10B, while the piston 220 and the poppet valve 230 are raised, the contents introduced from the tube flow into the internal space of the pump chamber 200 (FIG. 10A), and the contents introduced into the pump chamber 200. When the piston 220 and the poppet valve 230 descend, the flow of the contents in the process of ascending to the actuator (FIG. 10B) through the flow path 261 is respectively shown.

While the content of the present invention has been described with reference to examples, it will be easy for those skilled in the art to make various applications and modifications within the scope of the present invention.

Compared to the conventional pump, the manual injection pump of the present invention has a low component number and a simple structure, thus lowering the manufacturing cost of the product, and innovatively reducing molding problems and high failure rate of the housing protrusion, which is a problem of the conventional pump. Just by adjusting the dimensions, it is possible to freely adjust the pumping amount without changing the overall structure, there is a feature that can be used in various injection pumps. In addition, since after the pumping, i.e., when the downward force applied to the actuator is removed, the piston is quickly restored by the second spring, so that the pumping and / or the transition to the ready state of use of the next stage are performed very quickly. This has the advantage of being convenient.

Claims (4)

A manual injection pump comprising an actuator mounted on the top of the pump and injecting the contents, a pump chamber that sucks the contents in the container and supplies it to the actuator, and a sealing portion that mounts the pump chamber in the container and seals the pump chamber from the outside. The pump chamber has a housing that forms the exterior of the pump chamber, a piston which is fastened to the lower portion of the actuator and reciprocates along the inner surface of the housing and has an axial flow passage therein, and a rod for opening and closing the flow passage of the piston. And a second spring positioned between the lower portion of the housing and the poppet valve, and a second spring positioned between the lower portion of the piston and the poppet valve. The poppet valve has a lateral extension extending downward to a predetermined length on which the lower portion of the second spring is placed, and the lower portion of the poppet valve flows into an inner tube of the lower housing and fastens the upper portion of the first spring therein. A lower surface extension portion, wherein the lower surface extension portion has one or more recesses having a groove shape of a predetermined length, The housing is a manual injection pump, characterized in that it comprises a housing inner tube is located in the first spring and extending upward from the inlet. According to claim 1, wherein the shape of the housing inner tube is simply a cylindrical structure, or a cylindrical structure in which a protrusion corresponding to a recess on the lower surface extension of the poppet valve is formed inside the upper end of the inner tube. Manual injection pump. 2. The manual injection pump according to claim 1, wherein the pumping amount of the pump is adjusted by changing the length of the housing and the length of the lateral extension without changing the structure of other parts. According to claim 1, wherein the lateral extension is composed of a horizontal portion extending horizontally from the lower surface extension, and further vertically extending vertically downward from the horizontal portion, the vertical portion has a guide protrusion protruding toward the housing Manual injection pump, characterized in that the installation.