KR20220155770A - Elastic member and pump assembly including the same - Google Patents

Abstract

An elastic member is provided. The elastic member comprises: a plurality of elastic units which are repeatedly formed along the longitudinal direction and generate elastic force while being compressed when pressed, wherein each of the elastic units includes: an upper ring-shaped member in which an upper high point and an upper low point are repeatedly formed while being bent to rise and fall along the circumferential direction; and a lower ring-shaped member in which a lower high point and a lower low point are repeatedly formed while being bent to rise and fall along the circumferential direction, and at least one of the upper low points may be connected to at least one of the lower high points. According to the present invention, the elastic member can have sufficient elasticity through a structure in which the upper ring-shaped member and the lower ring-shaped member are repeated.

Description

An elastic member and a pump assembly including the 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 contents to the outside through a pumping operation of a pump assembly coupled to an upper portion of the container body, and is coupled to a container body in which the contents are stored and an upper portion of the container body to vacuum the inside of the container body. It is composed of a pump assembly that lifts the contents by a pumping operation and a button unit that is located on top of the pump assembly and moves up and down according to user pressure and transmits pressure to the pump assembly.

Here, the pump assembly performs a pumping operation so that contents stored in the container body are discharged to the outside, and may include a spring providing elastic force therein. Since the spring is usually made of metal, the manufacturing cost is high, and since the pump assembly is made of a heterogeneous material of plastic and metal, it must be separated and discarded for recycling, so recycling is not easy. there was.

To solve this problem, a spring made of plastic was developed. However, in the case of springs made of plastic, there is a problem that elasticity is insufficient compared to springs made of metal, and injection molding is not easy due to a complicated structure.

An object of the present invention is to provide an elastic member for solving 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 includes a plurality of elastic units that are repeatedly formed along the longitudinal direction and generate elastic force while being compressed when pressed. an upper ring-shaped member in which low points are repeatedly formed; and a lower ring-shaped member in which lower high points and lower low points are repeatedly formed while being bent to rise and fall 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, in the upper ring-shaped member, a first upper high point, a first upper low point, a second upper high point, and a second upper low point are sequentially formed along the circumferential direction, and the lower ring-shaped member is formed along the circumferential direction. 1 lower high point, a first lower low point, a second lower high point, and a second lower low point are sequentially formed, the first upper low point being connected to the first lower high point, and the second upper low point being connected to the second upper high point. can be connected with

In addition, the elastic unit may decrease in thickness from the inside toward the outside.

In addition, 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.

In addition, the twist may be formed while at least one of the upper ring-shaped member and the lower ring-shaped member extends along the circumferential direction and rotates based on the circumferential direction.

In addition, while at least a part of the twist is resolved by the pressing, additional elastic force for recovering the twist may be generated.

In addition, in at least one of the upper ring-shaped member and the lower ring-shaped member, the inner curvature of the inner surface center line and the outer curvature of the outer surface center line are different from each other by the twist, and while at least a part of the twist is eliminated, the inner curvature and A difference between the outer curvatures may be reduced.

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

The device may further include an upper connection part formed upwardly from at least one of the upper high point and the lower high point, and a lower connection part formed downwardly from at least one of the upper low point and the lower low point, wherein the upper connection part and the lower connection part can combine with each other.

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

A pump assembly is also provided according to an embodiment of the present invention. The pump assembly may include: the elastic member; A cylinder with open top and bottom and a hollow inside; a seal cap provided on an inner wall of the cylinder; a sealing unit having at least a portion inserted into the cylinder to suppress a rise of the seal cap; a piston rod having an inlet opened and closed by the seal cap at a lower end and a passage connected to the inlet to an upper end; and a stem coupled to move up and down together with the piston rod, wherein the elastic member is provided between the stem and the sealing part to provide an elastic force from the sealing part toward the stem.

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

Further, according to the present invention, since torsion is applied to the elastic unit, at least a part of the torsion is relieved when pressurized, and additional elastic force for recovering the torsion can be generated.

In addition, according to the present invention, the thickness of the elastic unit decreases from the inside to the outside, so that the number of molds can be reduced and injection molding can be easily performed.

In addition, according to the present invention, by connecting the upper ring-shaped member and the lower ring-shaped member through the connecting portion, the upper ring-shaped member and the lower ring-shaped member can be stably connected without deformation in shape.

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.
2 is a view for explaining a process of compressing a ring-shaped member according to an embodiment of the present invention.
3 is a front view of an elastic unit according to an embodiment of the present invention.
4 is a perspective view of an elastic member according to an embodiment of the present invention.
5 is a front view of an elastic member according to an embodiment of the present invention.
6 is a cross-sectional view of an elastic member according to an embodiment of the present invention.
7 is a view for explaining a molding process of an elastic member according to an embodiment of the present invention.
8 is a front view of an elastic member according to an embodiment of the present invention.
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 described in the accompanying 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 accompanying drawings. Like reference numerals or numerals in each drawing indicate parts or components that perform substantially the same function. For convenience described below, directions of up, down, left, and right are based on the drawings, and the scope of the present invention is not necessarily limited to the corresponding directions.

Terms including ordinal numbers, such as first and second, may be used to describe various elements, but elements are not limited by the terms. Terms are only used to distinguish one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include a combination of a plurality of related items or any one of a plurality of related items.

Terms used in this specification are used to describe embodiments, and are not intended to limit and/or limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms include or have are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features, numbers, or steps However, it should be understood that it does not preclude the possibility of 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 the case where it is directly connected but also the case where it is indirectly connected through another component in the middle. In addition, when a part includes a certain component, this means that it may further include other components without excluding other components unless otherwise stated.

According to an embodiment of the present invention, an elastic member is provided. The elastic member may generate elastic force while being compressed in the longitudinal direction when pressed. Depending on the embodiment, the elastic member may perform a pumping operation by using an elastic force within the pump assembly, and the pump assembly may suck in and discharge contents through the pumping operation. However, this is exemplary, 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 an 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 a ring-shaped member is 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 repeatedly form high points 110 and 130 and low points 120 and 140 while being bent to rise and fall along the circumferential direction. The ring-shaped member 100 may generate elastic force while being compressed in the longitudinal direction (ie, up and down direction) by pressing. That is, during compression, the shape of the ring-shaped member 100 may be deformed to reduce the distance between the high points 110 and 130 and the low points 120 and 140, and during the decompression process in which the deformed shape is restored, the high point 110 , 130) and the troughs 120 and 140 may increase.

In an embodiment, the ring-shaped member 100 may be formed by applying twist along the circumferential direction. Specifically, the twist may be formed by rotating the ring-shaped member 100 along the circumferential direction while extending along the circumferential direction. Accordingly, when the ring-shaped member 100 is compressed by pressing, restoring force for restoring the twist may be generated while at least a part of the twist is resolved. The elastic force may be increased by the restoring force.

In an embodiment, the inner curvature of the center line 150 of the inner surface of the ring-shaped member 100 and the outer curvature of the center line 160 of the outer surface of the ring-shaped member 100 may be different. When the ring-shaped member 100 is compressed by pressing, at least part of the twist may be eliminated as the curvature difference between the inner curvature and the outer curvature decreases.

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

In an embodiment, the elastic force of the ring-shaped member 100 may be adjusted by adjusting the degree of twist. That is, the overall elastic force can be adjusted by changing only the torsion without changing the overall shape or size of the ring-shaped member 100, and furthermore, 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, as will be described in more detail below, the number of molds can be reduced during injection molding. In addition, by changing the shape of the outer surface of the ring-shaped member 100 in various ways in the process of reducing the thickness, 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 to prevent twisting of the ring-shaped member 100. shape, or the degree of twist can be adjusted.

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

2 is a view for explaining a 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 according to compression is shown.

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

In the process of compressing the ring-shaped member 100, lines on structural analysis of changes in stress acting on the ring-shaped member 100 are indicated by thin lines in FIGS. 2(a) to (f). Stress refers to the resistance generated in a material corresponding to the size when a load (external force) such as compression, tension, bending, torsion, etc. is applied to the material.

That is, the ring-shaped member 100 does not have stress at the initial stage of compression (see (a) in FIG. 2 ), but in the process of compressing the ring-shaped member 100, a specific region (for example, the high point 110) where torsion is relieved. ), etc.) may gradually increase (see (b) to (f) of FIG. 2). This gradually increasing stress may act as a force for shape restoration. That is, the restoring force due to the increase in stress due to the relief of torsion may increase the elastic force of the ring-shaped member 100 .

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

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 may be described similarly to the ring-shaped member 100 of FIGS. 1 and 2, and overlapping contents are omitted below.

In the embodiment, the upper ring-shaped member 210 may have upper high points 211 and 213 and upper low points 212 and 214 repeatedly formed, and the lower ring-shaped member 220 may have lower high points 221 and 223 and lower low points. (222, 224) may 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 integrally form the elastic unit 200 .

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

In the 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. In the lower ring-shaped member 220, 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 are 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 thereto.

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 distance between the upper high points 211 and 213 and the lower low points 222 and 224. , 220) may be deformed. During the decompression process in which the deformed shape is restored, the distance between the upper peaks 211 and 213 and the lower low points 222 and 224 may increase.

In the embodiment, torsion is 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 generate stress for shape recovery while the twist is relieved in the compression process, and the restoring force caused by the stress can reinforce 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 twist directions (ie, rotational directions) opposite to each other. For example, twisting may be applied to the upper peaks 211 and 213 in a lower direction, and twisting may be applied to the lower lower points 222 and 224 in an upward direction. According to this, the upper peaks 211 and 213, in which twist is applied in the downward direction and the outer region is formed lower than the inner region, are deformed so that the outer region relatively rises toward the inside while the twist is resolved during the compression process. . In addition, the lower low points 222 and 224, in which twist is applied upward and the outer region is formed higher than the inner region, are deformed so that the outer region relatively descends toward the inner region while the twist is resolved during the compression process. That is, during the compression process, the twisting of the outer regions of the upper peaks 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 distance between the upper ring-shaped member 210 and the lower ring-shaped member 220, thereby increasing the elastic compression distance of the elastic unit 200 and the resulting elastic force. Additionally/alternatively, for example, upper troughs 212 and 214 may be twisted in an upward direction and lower troughs 221 and 223 may be twisted in a lower direction. However, it is not limited thereto.

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

For example, although the elastic unit 200 is shown as including an upper ring-shaped member 210 and a lower ring-shaped member 220 in FIG. 3 , according to embodiments, the elastic unit 200 may include an upper ring-shaped member 210 and the lower ring-like member 220, or at least one second upper ring-like member and/or at least one second lower ring-like member in addition to the upper ring-like member 210 and the lower ring-like member 220. can include more.

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 the elastic member according to an embodiment of the present invention, Figure 6 is a cross-sectional view of the 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 that is 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 may be described similarly to the elastic unit 200 of FIG. 3, and overlapping descriptions will be omitted below.

In the embodiment, the first elastic unit 200-1 and the second elastic unit 200-2 are respectively upper ring-shaped members 210-1 and 210-2 and lower ring-shaped members 220-1 and 220-2 In this case, the upper low points 212-1 and 212-2 of the upper ring-like members 210-1 and 210-2 are the lower high points 222-1 and 220-2 of the lower ring-like members 220-1 and 220-2. 1, 222-2) and can be connected to each other. Similarly, the elastic member 300 includes the first elastic unit 200-1 and the second elastic unit 200-2, but 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 forming the respective elastic units 200-1 and 200-2 is the same. It can be used to connect the plurality of elastic units 200-1 and 200-2.

In the embodiment, when the elastic member 300 is compressed by pressing, the distance between the upper high point 211-1 and the lower low point 222-1 of the first elastic unit 200-1 decreases, and similarly, the second A distance between the upper high point 211-2 and the lower low point 222-2 of the elastic unit 200-2 may decrease. In addition, elastic force may be generated while 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 decreases.

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

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 above the elastic unit 200 and the lower support 320 may be disposed below the elastic unit 200 . Accordingly, the upper support body 310 and the lower support body 320 stably support the upper and lower portions of the plurality of elastic units 200 to stably transmit the elastic force generated by compression of the elastic units 200 in the longitudinal direction. have.

The elastic member 300 shown in FIGS. 4 to 6 is exemplary, and various configurations may be applied according to an embodiment to which the present invention is applied. For example, although the elastic member 300 of FIGS. 4 to 6 is shown as including three elastic units 200, the elastic member 300 has fewer or more elastic units 200 according to embodiments. ) may be included. In addition, 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.

7 is a view for explaining a molding process of an elastic member according to an embodiment of the present invention.

In general, injection molding is performed by injecting a heated and melted injection material into a mold through a nozzle to solidify it, and then removing the mold to take out the solidified injection material. At this time, the injection mold is usually a two-stage mold disposed in both directions of the injection product to repeat contact and separation, or a three-stage mold disposed in the center and both directions of the injection product to repeat contact and separation, for ease of taking out the injection product. Molds and the like are mainly used.

However, in the case of such a two-stage mold or a three-stage mold, since the molds disposed in both directions are separated, taking out is made, so that taking out is impossible when there is a hole, protruding part, or concave part in the molded product. This is because the hole, the protruding part or the concave part gets caught in the mold when the two-way mold is separated. In this way, a part that cannot be taken out during injection molding is called an undercut, and in order to enable injection molding of a molded article with an undercut, the design of a mold or the injection molding process must be complicated.

When the elastic unit 200 of the elastic member 300 is formed with a constant thickness, according to the three-stage mold as shown in FIG. 7, the twist of the elastic unit 200, that is, the difference between the inner curvature and the outer curvature As a result, a concave portion, that is, an undercut, is generated on the inner surface of the elastic unit 200 . In order to allow injection molding to be performed 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 , when the thickness of the elastic unit 200 decreases from the inside to the outside, undercut does not occur. That is, since injection molding can be easily performed even by using a three-stage mold, mass production can be facilitated by increasing process efficiency and economic feasibility.

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

The elastic member 300' of FIG. 8 may be described similarly to the elastic member 300 of FIGS. 4 to 7, and duplicate 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 connecting portion 330 is formed upward from the upper surface of the high point of the upper ring-shaped member and/or the lower ring-shaped member (ie, the upper high point and/or the lower high point), and the lower connecting portion 340 is formed on the upper ring-shaped member and/or the lower high point. It may be formed from the lower surface of the low point of the ring-shaped member (ie, the upper low point and/or the lower low point) to the lower side.

The upper connection part 330 is formed upward from the upper surface of the high point, and may be combined with a configuration located on the upper side. For example, the upper connection part 330 may be combined with the lower connection part 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 lower surface of the upper supporter located on the upper side.

The lower connection part 340 is formed downward from the lower surface of the low point, and may be combined with a configuration located on the lower side. For example, the lower connecting portion 340 may be coupled to the upper connecting portion 330 of the upper ring-shaped member and/or the lower ring-shaped member located on the lower side. Also, for example, the lower connection part 340 may be coupled to the upper surface of the lower supporter located on the lower side.

In an embodiment, the upper ring-shaped member and the lower ring-shaped member (particularly, the high point and the low point) may be coupled to each other while being at least partially spaced apart from each other by coupling between the upper connecting portion 330 and the lower connecting 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-like member and the lower high point of the lower ring-like member are completely coupled to each other, the elastic deformation of the upper ring-like member is transferred to the lower ring-like member through the lower high point coupled to the upper low point, and similarly, the lower The elastic deformation of the ring-shaped member is transferred to the upper ring-shaped member as it is through the upper low point coupled to the lower high point. In this case, elastic deformation occurs irregularly and deflectively. However, when the upper ring-shaped member and the lower ring-shaped member are coupled through the upper connecting portion 330 and the lower connecting 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 connecting portion 330 and the lower connecting portion 340, and elastic deformation of one of the upper ring-shaped member and the lower ring-shaped member can be prevented from being transferred to the other ring-shaped member, making the overall uniform and balanced. It can generate an elastic force. In the above, the coupling between the upper connecting portion 330 and the lower connecting portion 340 is described, but this is for simplicity of explanation, and the coupling between the upper connecting portion 330 and the upper support and/or the lower connecting portion 340 and the lower support The connection between the two is similarly described.

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

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

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 receives an external force from the user, causes a pressure change inside, and inflows and discharges contents therethrough. Specifically, the cylinder 410 and the seal cap 420 ), a sealing part 430, a piston rod 440, a stem 450, and an elastic member 300.

The cylinder 410 may be penetrated vertically to provide a space in which contents flow in and out. The cylinder 410 is located inside the spout of the container (not shown), but has wing wings formed to the outside, so that it can be seated on the spout of the container. The lower end of the cylinder 410 may extend toward the inside of the container, and an inlet communicating with the container may be formed. A valve may be provided at or adjacent to the inlet. The valve is a non-return valve, and may close the inlet when the internal pressure of the cylinder 410 is a positive pressure, and open the inlet when the internal pressure of the cylinder 410 changes to a negative pressure.

The seal cap 420 is for opening and closing the piston rod 440, and may have an outer surface in close contact with the cylinder 410 and an inner surface in close contact with the piston rod 440. The lower end of the 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, and when the piston rod 440 descends based on the seal cap 420, the seal cap ( As the lower end of the piston rod 440 moves away from the receiving portion of the piston rod 440, the inlet is opened and communicates with the inside of the cylinder 410.

The sealing unit 430 may be coupled to an upper end of the cylinder 410 and may have a lower end extending toward the inside of the cylinder 410 . A rise of the seal cap 420 may be suppressed by the sealing part 430 . In addition, the lower end of the elastic member 300 may be supported by the sealing portion 430 .

The piston rod 440 is provided inside the cylinder 410, the lower side is surrounded by the seal cap 420, and the upper side may be connected to the stem 450. The piston rod 440 has a hollow tubular shape, an inlet opened and closed by a seal cap 420 is formed on the lower side of the piston rod 440, and the contents introduced through the inlet flow out on the upper side of the piston rod 440. An outlet may be formed. In addition, a support portion is formed at the lower end of the piston rod 440, and when the lower end of the inner surface of the seal cap 420 is in 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 end of the inner surface of the seal cap 420 is spaced apart from the receiving portion and the inlet is opened so that contents inside the cylinder 410 may be introduced into the piston rod 440 . If the piston rod 440 continues to move, the contents may be discharged through the outlet and then passed through the stem 450 and discharged through the discharge hole of the nozzle. When the piston rod 440 moves upward, the cylinder 410 may seal the inlet of the piston rod 440, and negative pressure is generated inside the cylinder 410, so that the contents in the container unit are moved inside the cylinder 410. can be introduced into

The stem 450 may move up and down together with the piston rod 440 by being coupled to the piston rod 440 . Specifically, the stem 450 may lower the piston rod 440 while descending when an external force is applied through, for example, a nozzle, and raise the piston rod 440 while rising when the external force is removed. have. An upper end of the stem 450 may be formed with wings protruding outward along the circumference. An upper end of the elastic member 300 may be supported by a lower surface of the wing unit. The length of the accommodation space of the elastic member 300 may be defined by the length from the lower surface of the wing unit to the upper surface of the base unit of the sealing unit 430 .

The elastic member 300 is for restoring the position of the piston rod 440, the lower support 320 is supported by the sealing portion 430, and the upper support 310 can be supported by the stem 450. . Here, the lower end of the stem 450 is coupled to the piston rod 440 and is formed through the top and bottom, so that the content introduced from the piston rod 440 can move upward. When the user presses the pump assembly 400, the plurality of elastic units 200 may be compressed while the upper support 310 and the stem 450 move downward. At this time, the piston rod 440 coupled to the stem 450 may move downward together. Also, when the user releases the pressure, the elastic force of the elastic unit 200 can restore the upper support 310 and the stem 450 upward. 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 exemplary, and various configurations may be applied according to an 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 optimum embodiment has been disclosed in the drawings and specifications. Although specific terms have been used herein, they are only used for the purpose of describing the present invention and are not used to limit the scope of the present invention described in the claims or defining the meaning. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended 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
340: lower connection portion 400: pump assembly
410: cylinder 420: seal cap
430: sealing part 440: piston rod
450: stem

Claims (11)

As an elastic member,
It is repeatedly formed along the length direction and includes a plurality of elastic units that generate elastic force while being compressed when pressed,
Each of the elastic units may include an upper ring-shaped member in which an upper high point and an upper low point are repeatedly formed while being bent to rise and fall along the circumferential direction; And a lower ring-shaped member in which a lower high point and a lower low point are repeatedly formed while being bent to rise and fall along the circumferential direction,
At least one of the upper low points is connected to at least one of the lower high points. According to claim 1,
In the upper ring-shaped member, a first upper high point, a first upper low point, a second upper high point, and a second upper low point are sequentially formed along the circumferential direction;
In the lower ring-shaped member, a first lower high point, a first lower low point, a second lower high point, and a second lower low point are sequentially formed along the circumferential direction;
wherein 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. According to claim 1,
The elastic unit, the elastic member of which the thickness decreases from the inside toward the outside. According to claim 1,
At least one of the upper ring-shaped member and the lower ring-shaped member is formed by applying twist along the circumferential direction, the elastic member. According to claim 4,
The twist is formed while 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. According to claim 4,
As at least a part of the twist is relieved by the pressing, an additional elastic force for recovering the twist is generated, the elastic member. According to claim 4,
In at least one of the upper ring-shaped member and the lower ring-shaped member, the inner curvature of the inner surface centerline and the outer curvature of the outer surface centerline are different from each other due to the twist,
The elastic member according to claim 1 , wherein a difference between the inner curvature and the outer curvature is reduced while at least a portion of the twist is relieved. According to claim 7,
The elastic member, wherein the inner curvature is greater than the outer curvature. According to claim 1,
An upper connection part formed upwardly from at least one of the upper high point and the lower high point, and a lower connection part formed downwardly from at least one of the upper low point and the lower low point, wherein the upper connection part and the lower connection part are coupled to each other. , an elastic member. According to claim 1,
an upper supporter disposed above the elastic unit; and a lower supporter disposed below the elastic unit, the elastic member. As a pump assembly,
An elastic member according to any one of claims 1 to 10;
A cylinder with open top and bottom and a hollow inside;
a seal cap provided on an inner wall of the cylinder;
a sealing unit having at least a portion inserted into the cylinder to suppress a rise of the seal cap;
a piston rod having an inlet opened and closed by the seal cap at a lower end and a passage connected to the inlet to an upper end; and
A stem coupled to move up and down together with the piston rod,
The elastic member is provided between the stem and the sealing part to provide an elastic force from the sealing part toward the stem.

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