KR102601566B1 - Elastic member and pump assembly including the same - Google Patents

Abstract

According to an embodiment of the present invention, an elastic member is provided. The elastic member is repeatedly formed along the longitudinal direction and includes a plurality of elastic units that generate elastic force while being compressed when pressed, and each of the elastic units is bent to rise and fall along the circumferential direction, and moves between the upper high point and the upper side. an upper ring-shaped member with repeated low points; and a lower ring-shaped member in which lower high points and lower low points are repeatedly formed while bending upward and downward along the circumferential direction, wherein at least one of the upper low points may be connected to at least one of the lower high points.

Description

Elastic member and pump assembly including same {ELASTIC MEMBER AND PUMP ASSEMBLY INCLUDING THE SAME}

The present invention relates to an elastic member and a pump assembly including the same.

In general, a pump container is configured to discharge the contents to the outside through the pumping action of a pump assembly coupled to the upper part of the container body. It is coupled to the container body in which the contents are stored and the upper part of the container body and vacuums the inside of the container body. It consists of a pump assembly that raises the contents through a pumping operation, and a button located at the top of the pump assembly that moves up and down in response to user pressure and transmits pressure to the pump assembly.

Here, the pump assembly performs a pumping operation so that the contents stored in the container body are discharged to the outside, and for this purpose, it may include a spring that provides elastic force inside. Since springs are usually made of metal, the manufacturing cost is high, and since the pump assembly is made of different materials such as plastic and metal, it must be separated and disposed of for recycling, which makes recycling difficult. there was.

To solve this problem, a spring made of plastic was developed. However, these springs made of plastic had a problem of insufficient elasticity compared to springs made of metal, and had a complicated structure, making injection molding difficult.

The purpose of the present invention is to provide an elastic member to solve the above problems.

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

According to an embodiment of the present invention, an elastic member is provided. The elastic member is repeatedly formed along the longitudinal direction and includes a plurality of elastic units that generate elastic force while being compressed when pressed, and each of the elastic units is bent to rise and fall along the circumferential direction, and moves between the upper high point and the upper side. an upper ring-shaped member with repeated low points; and a lower ring-shaped member in which lower high points and lower low points are repeatedly formed while bending upward and downward along the circumferential direction, wherein at least one of the upper low points may be connected to at least one of the lower high points.

In addition, the upper ring-shaped member has a first upper high point, a first upper low point, a second upper high point, and a second upper low point sequentially formed along the circumferential direction, and the lower ring-shaped member has a first upper high point, a first upper low point, and a second upper low point along the circumferential direction. The first lower high point, the first lower low point, the second lower high point, and the second lower low point are formed sequentially, the first upper low point is connected to the first lower high point, and the second upper low point is connected to the second upper high point. can be connected to

Additionally, the thickness of the elastic unit may decrease from the inside to the outside.

Additionally, at least one of the upper ring-shaped member and the lower ring-shaped member may be formed by applying twist along the circumferential direction.

Additionally, the twist may be formed when at least one of the upper ring-shaped member and the lower ring-shaped member extends along the circumferential direction and rotates with respect to the circumferential direction.

Additionally, as at least a portion of the twist is relieved by the pressure, additional elastic force may be generated to restore the twist.

In addition, at least one of the upper ring-shaped member and the lower ring-shaped member has an inner curvature of the center line of the inner side and an outer curvature of the center line of the outer side due to the twist, and at least part of the twist is resolved, and the inner curvature and The difference between the outer curvatures can be reduced.

Additionally, the inner curvature may be greater than the outer curvature.

In addition, it further includes an upper connection part formed upward from at least one of the upper high point and the lower high point and a lower connection part formed downward from at least one of the upper low point and the lower low point, and the upper connection part and the lower connection part can be combined with each other.

Additionally, an upper supporter disposed above the elastic unit; And it may further include a lower support disposed below the elastic unit.

Additionally, a pump assembly is provided in accordance with an embodiment of the present invention. The pump assembly includes the elastic member; A cylinder with an open top and bottom and a hollow interior; A seal cap provided on the inner wall of the cylinder; a sealing portion at least partially inserted into the cylinder to prevent the seal cap from rising; a piston rod having an inlet opened and closed by the seal cap at the bottom, and a passage connected to the inlet to the top; and a stem coupled to be raised and lowered together with the piston rod, wherein the elastic member is provided between the stem and the sealing portion to provide elastic force from the sealing portion toward the stem.

According to the present invention, the elastic member can be made to have sufficient elastic force through a structure in which the upper ring-shaped member and the lower ring-shaped member are repeated.

In addition, according to the present invention, since torsion is applied to the elastic unit, at least part of the torsion is resolved when pressing and additional elastic force to recover the torsion can be generated.

Additionally, according to the present invention, the thickness of the elastic unit decreases as it moves from the inside to the outside, thereby reducing the number of molds and making injection molding easier.

Additionally, according to the present invention, by connecting the upper ring-shaped member and the lower ring-shaped member through the connection portion, the upper ring-shaped member and the lower ring-shaped member can be stably connected without deforming their shapes.

In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.
1 is a front view of a ring-shaped member according to an embodiment of the present invention.
Figure 2 is a diagram for explaining the process of compressing a ring-shaped member according to an embodiment of the present invention.
Figure 3 is a front view of an elastic unit according to an embodiment of the present invention.
Figure 4 is a perspective view of an elastic member according to an embodiment of the present invention.
Figure 5 is a front view of an elastic member according to an embodiment of the present invention.
Figure 6 is a cross-sectional view of an elastic member according to an embodiment of the present invention.
Figure 7 is a diagram for explaining the forming process of an elastic member according to an embodiment of the present invention.
Figure 8 is a front view of an elastic member according to an embodiment of the present invention.
Figure 9 is a cross-sectional view of a pump assembly according to an embodiment of the present invention.

Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the contents depicted in the attached drawings. In addition, a method of configuring and using a device according to an embodiment of the present invention will be described in detail with reference to the contents described in the attached drawings. The same reference numbers or symbols shown in each drawing indicate parts or components that perform substantially the same function. For convenience, the up, down, left, and right directions described below are based on the drawings, and the scope of the present invention is not necessarily limited to those directions.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. Terms are used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present invention. The term and/or includes a combination of a plurality of related items or any one item among a plurality of related items.

The terms used herein are used to describe embodiments and are not intended to limit and/or limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as include or have are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are intended to indicate the presence of one or more other features, numbers, or steps. , it should be understood that it does not exclude in advance the possibility of the existence or addition of operations, components, parts, or combinations thereof.

Throughout the specification, when a part is said to be connected to another part, this includes not only cases where it is directly connected, but also cases where it is indirectly connected with another component in between. Additionally, when it is said that a part includes a certain component, this does not mean that other components are excluded, but that it can further include other components, unless specifically stated to the contrary.

According to an embodiment of the present invention, an elastic member is provided. The elastic member may generate elastic force by being compressed in the longitudinal direction when pressed. Depending on the embodiment, the elastic member may allow a pumping operation to be performed using elastic force within the pump assembly, and the pump assembly may suction and discharge contents through the pumping operation. However, this is an example and is not limited thereto.

In the present invention, the elastic member includes a plurality of elastic units that are repeatedly formed along the longitudinal direction, are compressed when pressed, and generate elastic force, and the elastic unit may include a plurality of ring-shaped members. That is, the elastic member may have a structure in which ring-shaped members are repeated along the longitudinal direction.

1 is a front view of a ring-shaped member according to an embodiment of the present invention.

Referring to FIG. 1, the ring-shaped member 100 may be bent upwards and downwards along the circumferential direction to repeatedly form high points 110 and 130 and low points 120 and 140. The ring-shaped member 100 may generate elastic force while being compressed in the longitudinal direction (i.e., vertical direction) by pressure. That is, during the compression process, the shape of the ring-shaped member 100 may be deformed so that the gap between the high points 110, 130 and the low points 120, 140 is reduced, and during the decompression process in which the deformed shape is restored, the high point 110 , 130) and the low point (120, 140) may increase.

In an embodiment, the ring-shaped member 100 may be formed by applying twist along a circumferential direction. Specifically, the twist may be formed by the ring-shaped member 100 extending along the circumferential direction and rotating about the circumferential direction. Accordingly, when the ring-shaped member 100 is compressed by pressure, at least part of the twist is resolved, and a restoring force for recovering the twist may be generated. Elasticity can be increased by restoring force.

In an embodiment, the inner curvature of the inner side center line 150 and the outer curvature of the outer side center line 160 of the ring-shaped member 100 may be different due to twisting. When the ring-shaped member 100 is compressed by pressure, at least part of the distortion may be resolved as the difference in curvature between the inner and outer curvatures is reduced.

In an embodiment, the inner curvature of the inner side centerline 150 of the ring-shaped member 100 may be greater than the outer curvature of the outer side centerline 160.

In an embodiment, the elastic force of the ring-shaped member 100 can be adjusted by adjusting the degree of twist. That is, the overall elastic force can be adjusted by changing only the twist without changing the overall shape or size of the ring-shaped member 100, or even the elastic member including the ring-shaped member 100.

In an embodiment, the ring-shaped member 100 may decrease in thickness from the inside to the outside. Through this thickness reduction, the number of molds during injection molding can be reduced, as will be described in more detail below. In addition, by changing the shape of the outer surface of the ring-shaped member 100 in various ways during the thickness reduction process, the difference in curvature between the center line of the inner surface and the center line of the outer surface of the ring-shaped member 100 is changed, thereby preventing twisting in the ring-shaped member 100. It can be formed or the degree of twist can be adjusted.

The ring-shaped member 100 shown in FIG. 1 is an example, and various configurations may be applied depending on the embodiment to which the present invention is applied. For example, in Figure 1, two high points (110, 130) and two low points (120, 140) are shown as being formed, but depending on the embodiment of the invention, fewer or more high points and/or low points are formed. It could be.

Figure 2 is a diagram for explaining the process of compressing a ring-shaped member according to an embodiment of the present invention.

Referring to FIG. 2, a shape change process of a portion of the ring-shaped member 100 due to compression is shown.

Specifically, the ring-shaped member 100 has different inner and outer curvatures due to twisting in the initial state (see (a) of FIG. 2), but the difference between the inner and outer curvatures may gradually decrease during the compression process. (See Figure 2 (b) to (e)). Finally, when the ring-shaped member 100 is maximally compressed, the inner curvature and the outer curvature may correspond to each other (see (f) of FIG. 2).

Structural analysis lines for changes in stress acting on the ring-shaped member 100 during the compression process of the ring-shaped member 100 are shown as thin lines in Figures 2 (a) to (f). Stress refers to the resistance that occurs within a material in response to its size when a load (external force) such as compression, tension, bending, or torsion is applied to the material.

That is, stress does not apply to the ring-shaped member 100 in the initial stage of compression (see (a) of FIG. 2), but in the process of compressing the ring-shaped member 100, a specific area (for example, high point 110) where the twist is resolved is not applied. ), etc.) stress may gradually increase (see (b) to (f) of Figure 2). In this way, gradually increasing stress can act as a force for shape restoration. In other words, the restoring force due to the increase in stress due to resolution of the twist may increase the elastic force of the ring-shaped member 100.

The ring-shaped member 100 shown in FIG. 2 is an example, and various configurations may be applied depending on the embodiment to which the present invention is applied.

Figure 3 is a front view of an elastic unit according to an embodiment of the present invention.

Referring to FIG. 3 , the elastic unit 200 may include an upper ring-shaped member 210 and a lower ring-shaped member 220. The upper ring-shaped member 210 and the lower ring-shaped member 220 can be described similarly to the ring-shaped member 100 of FIGS. 1 and 2, and overlapping content will be omitted below.

In an embodiment, the upper ring-shaped member 210 may be formed by repeating upper high points 211 and 213 and upper low points 212 and 214, and the lower ring-shaped member 220 may have lower high points 221 and 223 and lower low points. (222, 224) can be formed repeatedly. At this time, the upper low points 212 and 214 and the lower high points 221 and 223 are connected to each other, so that the upper ring-shaped member 210 and the lower ring-shaped member 220 can form the elastic unit 200 integrally.

In an embodiment, the upper low points 212, 214 are connected to the lower high points 221, 223 of the lower ring-shaped member 220, and the upper high points 211, 213 and lower low points 222, 224 correspond to each other. can be formed in Through this, during the compression and decompression process, the shape deformation of the upper ring-shaped member and the lower ring-shaped member correspond to each other, thereby improving the safety and elastic efficiency of the structure.

In an embodiment, the upper ring-shaped member 210 has a first upper high point 211, a first upper low point 212, a second upper high point 213, and a second upper low point 214 sequentially along the circumferential direction. Formed, the lower ring-shaped member 220 has a first lower high point 221, a first lower low point 222, a second lower high point 223, and a second lower low point 224 sequentially formed along the circumferential direction. The first upper low point 212 may be connected to the first lower high point 221, and the second upper low point 214 may be connected to the second upper high point 223. However, it is not limited to this.

In the embodiment, when the elastic unit 200 is pressed, the elastic unit 200 is compressed, and in this process, the ring-shaped member 210 reduces the gap between the upper high points 211 and 213 and the lower low points 222 and 224. , 220) may be modified in shape. During the decompression process in which the deformed shape is restored, the gap between the upper high points 211 and 213 and the lower low points 222 and 224 may increase.

In an embodiment, torsion may be applied to the upper ring-shaped member 210 and/or the lower ring-shaped member 220 to further strengthen the elastic force. Specifically, the upper ring-shaped member 210 and/or the lower ring-shaped member 220 formed by applying twist generates stress for shape recovery as the twist is resolved during the compression process, and the restoring force caused by the stress can strengthen the elastic force. .

In an embodiment, the twist applied to the upper ring-shaped member 210 and the twist applied to the lower ring-shaped member 220 may have opposite directions of twist (i.e., rotational directions). For example, twist may be applied in the downward direction to the upper high points 211 and 213, and twist may be applied in the upward direction to the lower low points 222 and 224. According to this, the upper high points 211 and 213, where twist is applied in the downward direction and the outer region is formed lower than the inner region, are transformed in shape so that the outer region rises relatively toward the inner direction as the twist is resolved during the compression process. . In addition, the lower troughs 222 and 224, where twist is applied in the upward direction and the outer region is formed to be higher than the inner region, are transformed in shape so that the outer region relatively descends toward the inner region as the twist is resolved during the compression process. That is, during the compression process, the distortion of the outer regions of the upper high points 211 and 213 and the outer regions of the lower low points 222 and 224 may be resolved in a direction in which the distance between them increases. This substantially increases the gap between the upper ring-shaped member 210 and the lower ring-shaped member 220, thereby increasing the elastic compression distance and resulting elastic force of the elastic unit 200. Additionally/alternatively, for example, the upper low points 212 and 214 may have twist applied in the upward direction, and the lower high points 221 and 223 may have twist applied in the downward direction. However, it is not limited to this.

The elastic unit 200 shown in FIG. 3 is an example, and various configurations may be applied depending on the embodiment to which the present invention is applied.

For example, in FIG. 3 , the elastic unit 200 is shown as including an upper ring-shaped member 210 and a lower ring-shaped member 220; however, depending on the embodiment, the elastic unit 200 may include an upper ring-shaped member 210. and a lower ring-shaped member 220, or at least one second upper ring-shaped member and/or at least one second lower ring-shaped member in addition to the upper ring-shaped member 210 and the lower ring-shaped member 220. More may be included.

Figure 4 is a perspective view of an elastic member according to an embodiment of the present invention, Figure 5 is a front view of an elastic member according to an embodiment of the present invention, and Figure 6 is a cross-sectional view of an elastic member according to an embodiment of the present invention.

Referring to FIGS. 4 to 6 , the elastic member 300 may include at least one elastic unit 200 repeatedly formed along the longitudinal direction.

In an embodiment, the elastic member 300 may include a first elastic unit 200-1 and a second elastic unit 200-2. The first elastic unit 200-1 and the second elastic unit 200-2 can be described in the same way as the elastic unit 200 of FIG. 3, and overlapping descriptions will be omitted below.

In an embodiment, the first elastic unit 200-1 and the second elastic unit 200-2 each include upper ring-shaped members 210-1 and 210-2 and lower ring-shaped members 220-1 and 220-2. It may include, where the upper low points (212-1, 212-2) of the upper ring-shaped members (210-1, 210-2) are the lower high points (222-) of the lower ring-shaped members (220-1, 220-2). 1, 222-2) and can be connected to each other. Likewise, the elastic member 300 includes a first elastic unit 200-1 and a second elastic unit 200-2, and the lower ring-shaped member 220-1 of the first elastic unit 200-1 The lower low point 222-1 and the upper high point 211-2 of the upper ring-shaped member 210-2 of the second elastic unit 200-2 may be connected to each other. In this way, the coupling method between the upper ring-shaped members 210-1 and 210-2 and the lower ring-shaped members 220-1 and 220-2, which form each elastic unit 200-1 and 200-2, is the same. It can be used to connect a plurality of elastic units 200-1 and 200-2.

In an embodiment, when the elastic member 300 is compressed by pressing, the gap between the upper high point 211-1 and the lower low point 222-1 of the first elastic unit 200-1 is reduced, and similarly, the second elastic member 300 is compressed by pressing. The gap between the upper high point 211-2 and the lower low point 222-2 of the elastic unit 200-2 may be reduced. In addition, elastic force may be generated as the distance between the lower high point 221-1 of the first elastic unit 200-1 and the upper low point 212-2 of the second elastic unit 200-2 is reduced.

In an embodiment, when the elastic member 300 is pressed, the twist applied to the first elastic unit 200-1 and the second elastic unit 200-2 is resolved and additional elastic force can be exerted.

In an embodiment, the first elastic unit 200-1 and the second elastic unit 200-2 included in the elastic member 300 may decrease in thickness from the inside to the outside.

In an embodiment, the elastic member 300 may further include an upper support body 310 and a lower support body 320. The upper support 310 may be disposed on the upper side of the elastic unit 200, and the lower support 320 may be disposed on the lower side of the elastic unit 200. Accordingly, the upper support body 310 and the lower support body 320 stably support the upper and lower parts of the plurality of elastic units 200, so that the elastic force generated by compression of the elastic unit 200 can be stably transmitted in the longitudinal direction. there is.

The elastic member 300 shown in FIGS. 4 to 6 is an example, and various configurations may be applied depending on the embodiment to which the present invention is applied. For example, the elastic member 300 in FIGS. 4 to 6 is shown as including three elastic units 200, but depending on the embodiment, the elastic member 300 may include fewer or more elastic units 200. ) may include. Additionally, the elastic member 300 may include at least one elastic unit 200 and at least one upper ring-shaped member 210 and/or at least one lower ring-shaped member 220 connected thereto.

Figure 7 is a diagram for explaining the forming process of an elastic member according to an embodiment of the present invention.

In general, injection molding is performed through the process of injecting an injection material that is heated and melted into a liquid state into a mold through a nozzle to solidify, and then separating the mold and taking out the solidified injection material. At this time, for ease of ejection of the injection mold, the injection mold is usually a two-stage mold placed in both directions of the injection mold and repeating contact and separation, or a three-stage mold disposed in the center and both directions of the injection mold and repeating contact and separation. Molds, etc. are mainly used.

However, in the case of such a two-stage or three-stage mold, ejection is performed as the molds arranged in both directions are separated, so if the molded product has holes, protrusions, or concave parts, ejection becomes impossible. This is because when the two-way mold is separated, the hole, protruding portion, or concave portion gets caught in the mold. In this way, the part that cannot be taken out during injection molding is called an undercut, and in order to enable injection molding of a molded product with an undercut, the mold design must be complicated or the injection molding process must be complicated.

When the elastic unit 200 of the elastic member 300 is formed to have a constant thickness, when using a three-stage mold as shown in FIG. 7, the twist of the elastic unit 200, that is, the difference between the inner and outer curvatures, As a result, a concave portion, that is, an undercut, is generated on the inner surface of the elastic unit 200. In order to enable injection molding even for such an undercut shape, a more complex mold must be designed or a complicated process is required, which reduces the efficiency and economic feasibility of the process.

However, as shown in FIG. 7, if the thickness of the elastic unit 200 is formed to decrease from the inside to the outside, undercut will not occur. In other words, injection molding can be easily performed even with a three-stage mold, and the efficiency and economic feasibility of the process can increase, making mass production easier.

Figure 8 is a front view of an elastic member according to an embodiment of the present invention.

The elastic member 300' of FIG. 8 can be described similarly to the elastic member 300 of FIGS. 4 to 7, and overlapping descriptions will be omitted below.

Referring to FIG. 8, the elastic member 300' may include at least one upper connection part 330 and/or at least one lower connection part 340. Here, the upper connection portion 330 is formed upward from the upper surface of the high point (i.e., the upper high point and/or lower high point) of the upper ring-shaped member and/or the lower ring-shaped member, and the lower connecting portion 340 is formed from the upper surface of the upper ring-shaped member and/or the lower ring-shaped member. It may be formed downward from the lower surface of the low point (i.e., upper low point and/or lower low point) of the ring-shaped member.

The upper connection portion 330 is formed upward from the upper surface of the high point and can be coupled to a component located on the upper side. For example, the upper connection portion 330 may be coupled to the lower connection portion 340 of the upper ring-shaped member and/or the lower ring-shaped member located on the upper side. Also, for example, the upper connection part 330 may be coupled to the bottom of the upper support located on the upper side.

The lower connection portion 340 is formed downward from the bottom of the low point and can be combined with a component located on the lower side. For example, the lower connection portion 340 may be coupled to the upper ring-shaped member located below and/or the upper connection portion 330 of the lower ring-shaped member. Additionally, for example, the lower connection portion 340 may be coupled to the upper surface of the lower support located on the lower side.

In an embodiment, the upper and lower ring-shaped members (in particular, the high and low points) may be coupled to each other while at least partially spaced apart by coupling between the upper connection portion 330 and the lower connection portion 340. Through this, the elastic deformation of the upper ring-shaped member and the elastic deformation of the lower ring-shaped member can be separated. For example, when the upper low point of the upper ring-shaped member and the lower high point of the lower ring-shaped member are completely coupled to each other, the elastic deformation of the upper ring-shaped member is directly transmitted to the lower ring-shaped member through the lower high point combined with the upper low point, and similarly, the lower ring-shaped member The elastic deformation of the ring-shaped member is directly transmitted to the upper ring-shaped member through the upper low point combined with the lower high point. In this case, elastic deformation occurs irregularly and biased. However, when the upper ring-shaped member and the lower ring-shaped member are coupled through the upper connection portion 330 and the lower connection portion 340, the upper low point (or upper high point) of the upper ring-shaped member and the lower high point (or lower low point) of the lower ring-shaped member. The shape is maintained by the upper connection part 330 and the lower connection part 340, and it is possible to prevent elastic deformation of one of the upper ring-shaped member and the lower ring-shaped member from being transmitted to the other ring-shaped member, so that the overall shape is uniform and balanced. It can generate elastic force. In the above, the coupling between the upper connector 330 and the lower connector 340 is described, but this is for simplicity of explanation, and the coupling between the upper connector 330 and the upper support and/or the lower connector 340 and the lower support The connection between livers is similarly explained.

In an embodiment, the degree of twist of the ring-shaped member may be adjusted by adjusting the height of the upper connection portion 330 and/or the lower connection portion 340. For example, by adjusting the difference between the inner curvature and the outer curvature according to the height of the upper connection part 330 and/or the lower connection part 340, the degree of twist and elastic force can be adjusted.

The elastic member 300' shown in FIG. 8 is an example, and various configurations may be applied depending on the embodiment to which the present invention is applied.

Figure 9 is a cross-sectional view of a pump assembly according to an embodiment of the present invention.

Referring to FIG. 9, the pump assembly 400 is designed to receive an external force from the user, cause a pressure change inside, and inject and discharge contents through this. Specifically, the pump assembly 400 includes a cylinder 410 and a seal cap 420. ), a sealing portion 430, a piston rod 440, a stem 450, and an elastic member 300.

The cylinder 410 can penetrate up and down to provide a space through which contents flow in and out. The cylinder 410 is located inside the spout of the container (not shown), and has seating wings formed on the outside, so that it can be seated on the spout of the container. The lower end of the cylinder 410 may be extended toward the inside of the container, and an inlet communicating with the container may be formed. A valve may be provided at the inlet or adjacent to the inlet. The valve is a backflow prevention valve, and the inlet is sealed when the internal pressure of the cylinder 410 is positive, and the inlet can be opened when the internal pressure of the cylinder 410 changes to negative pressure.

The seal cap 420 is for opening and closing the piston rod 440, and its outer surface can be in close contact with the cylinder 410 and its inner surface can be in close contact with the piston rod 440. The lower inner surface of the seal cap 420 is in close contact with the support of the piston rod 440 to seal the inlet of the piston rod 440. When the piston rod 440 is lowered based on the seal cap 420, the seal cap ( As the bottom of the piston rod 440 moves away from the lower end of the piston rod 440, the inlet may be opened and communicate with the inside of the cylinder 410.

The sealing portion 430 is coupled to the upper end of the cylinder 410 and may be configured such that the lower end extends inside the cylinder 410. The seal cap 420 may be prevented from rising by the sealing portion 430. Additionally, the lower end of the elastic member 300 may be supported by the sealing portion 430.

The piston rod 440 may be provided inside the cylinder 410, with its lower side surrounded by a seal cap 420 and its upper side connected to the stem 450. The piston rod 440 has a hollow tube shape, and an inlet that is opened and closed by the seal cap 420 is formed on the lower side of the piston rod 440, and the contents flowing in through the inlet drain out on the upper side of the piston rod 440. An outlet may be formed. In addition, a support portion is formed at the bottom of the piston rod 440, and when the lower inner surface of the seal cap 420 comes into close contact with the support portion, the inlet can be sealed from the inner space of the cylinder 410. The piston rod 440 can move vertically within the cylinder 410 by the stem 450. When the piston rod 440 moves downward, the lower inner surface of the seal cap 420 is spaced apart from the support portion and the inlet is opened so that the contents inside the cylinder 410 can flow into the piston rod 440. If the piston rod 440 continues to move, the contents may be discharged through the outlet and then through the stem 450 and then through the discharge hole of the nozzle. When the piston rod 440 moves upward, the cylinder 410 can seal the inlet of the piston rod 440, and negative pressure is generated inside the cylinder 410, so that the contents in the container portion are inside the cylinder 410. may flow into.

The stem 450 can be moved up and down together with the piston rod 440 by combining it with the piston rod 440 . Specifically, the stem 450 can lower the piston rod 440 by descending when an external force is applied, for example, through a nozzle, etc., and can raise the piston rod 440 by rising when the external force is removed. there is. Wings that protrude outward along the circumference may be formed at the top of the stem 450. The top of the elastic member 300 may be supported by the bottom of the wing portion. The length of the accommodation space of the elastic member 300 may be defined by the length from the bottom of the wing portion to the top surface of the base of the sealing portion 430.

The elastic member 300 is for restoring the position of the piston rod 440. The lower support body 320 is supported by the sealing portion 430, and the upper support body 310 may be supported by the stem 450. . Here, the lower end of the stem 450 is coupled to the piston rod 440 and is formed to penetrate upward and downward, so that the contents flowing in from the piston rod 440 can move upward. When the user presses the pump assembly 400, the upper support 310 and the stem 450 move downward and the plurality of elastic units 200 may be compressed. At this time, the piston rod 440 coupled to the stem 450 may move downward together. Additionally, when the user releases the pressure, the elastic force of the elastic unit 200 can restore the upper support 310 and the stem 450 to the upper side. At this time, the piston rod 440 coupled to the stem 450 may move upward together.

The pump assembly 400 shown in FIG. 9 is an example, and various configurations may be applied depending on the embodiment to which the present invention is applied. For example, the pump assembly 400 may include an elastic member 300' instead of the elastic member 300.

As described above, the optimal embodiments are disclosed in the drawings and specifications. Although specific terms are used here, they are used only for the purpose of explaining the present invention and are not used to limit the meaning or scope of the present invention described in the claims. Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the attached patent claims.

100: ring-shaped member 110, 130: high point
120, 140: low point 150: medial center line
160: outer center line 200: elastic unit
200-1: first elastic unit 200-2: second elastic unit
210, 210-1, 210-2: upper ring-shaped member 211-1, 211-2: upper high point
212-1, 212-2: upper low point 220, 220-1, 220-2: lower ring-shaped member
221-1, 221-2: Lower high point 222-1, 222-2: Lower low point
300, 300': elastic member 310: upper support
320: lower support 330: upper connection part
340: lower connection 400: pump assembly
410: cylinder 420: seal cap
430: Sealing part 440: Piston rod
450: Stem

Claims (11)

As an elastic member,
It includes a plurality of elastic units that are repeatedly formed along the longitudinal direction and generate elastic force while being compressed when pressed,
Each of the elastic units includes an upper ring-shaped member in which upper high points and upper low points are repeatedly formed while being bent to rise and fall along the circumferential direction; And a lower ring-shaped member in which lower high points and lower low points are repeatedly formed while bending upward and downward along the circumferential direction,
At least one of the upper low points is connected to at least one of the lower high points,
At least one of the upper ring-shaped member and the lower ring-shaped member extends along the circumferential direction and rotates about the circumferential direction to form a twist in which the inner curvature of the inner center line and the outer curvature of the outer center line are different from each other,
When at least a portion of the twist is relieved by the pressing, the difference between the inner curvature and the outer curvature decreases, generating additional elastic force to restore the twist,
The elastic unit is an elastic member whose thickness decreases from the inside to the outside. According to claim 1,
The upper ring-shaped member has a first upper high point, a first upper low point, a second upper high point, and a second upper low point sequentially formed along the circumferential direction,
The lower ring-shaped member has a first lower high point, a first lower low point, a second lower high point, and a second lower low point sequentially formed along the circumferential direction,
The first upper low point is connected to the first lower high point, and the second upper low point is connected to the second upper high point. delete delete delete delete delete According to claim 1,
An elastic member wherein the inner curvature is greater than the outer curvature. According to claim 1,
It further includes an upper connection part formed upward from at least one of the upper high point and the lower high point and a lower connection part formed downward from at least one of the upper low point and the lower low point, and the upper connection part and the lower connection part are coupled to each other. An elastic member. According to claim 1,
an upper support disposed above the elastic unit; and an elastic member further comprising a lower support disposed below the elastic unit. As a pump assembly,
The elastic member according to any one of claims 1, 2 and 8 to 10;
A cylinder with an open top and bottom and a hollow interior;
A seal cap provided on the inner wall of the cylinder;
a sealing portion at least partially inserted into the cylinder to prevent the seal cap from rising;
a piston rod having an inlet opened and closed by the seal cap at the bottom, and a passage connected to the inlet to the top; and
It includes a stem coupled to be raised and lowered together with the piston rod,
The elastic member is provided between the stem and the sealing portion to provide elastic force from the sealing portion toward the stem.

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