Pump and spray container

Abstract

This invention provides a small pump with a non-moving discharge port. The upper part of the cylinder (10) is supported by the body (40) at a position higher than the opening of the container, such that the lower piston seal (21) and the upper piston seal (22) are located above the opening of the container. At least a portion of the nozzle (60) is located on the outer periphery of the body (40) within a range corresponding to the lower piston seal (21) and the upper piston seal (22). A through hole (16) is provided in the cylinder (10). The through hole (16) is located between the positions where the lower piston seal (21) and the upper piston seal (22) are in airtight contact with the inner wall of the cylinder.

Description

Technical Field

[0001] This invention relates to a pump for discharging liquid from a bottle. Background Technology

[0002] A pump that dispenses liquid from a bottle consists of a cylinder fixed at the bottle opening with a piston inserted into its upper end. Generally, a pressing part is connected to the upper end of the piston for the user to press, and this pressing part has a discharge port. When the user presses down the pressing part, the piston is pressed down, and a spring between the piston and the cylinder pushes the piston back to its original position, drawing liquid from the bottle into the cylinder. When the user presses down the pressing part again, the liquid in the cylinder is guided through a predetermined flow path from the inside of the piston to the discharge port and discharged.

[0003] As described above, the discharge port is generally located on the pressing part. Therefore, the discharge port moves up and down together with the pressing part and the piston. When the user presses down the pressing part, the discharge port also moves downwards. Consequently, the position of the discharge port when liquid is discharged is lower than its position before pressing, making it inconvenient when aiming the liquid at a specific position. Therefore, it is sometimes necessary to maintain a constant position of the discharge port regardless of the pressing operation.

[0004] To address this requirement, Patent Document 1 discloses a pump in which the discharge port does not move even when the user presses the piston. Specifically, it discloses a pump in which the upper end of the cylinder extends upward and has a discharge port at the upper end of the cylinder. In the pump of Patent Document 1, when the piston is pressed, the liquid inside the cylinder is pushed up through the interior of the piston to the upper end of the piston (upper shaft D2b), and is squeezed out to the outside of the piston through the gap between the upper end of the piston and a member such as a cap covering the upper end of the piston, and discharged from the discharge port of the cylinder.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2014-148318 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] In the pump of Patent Document 1, liquid is squeezed out to the outside of the upper shaft D2b through the gap between the upper end of the upper part of the piston D (upper shaft D2b) and a member such as a cover covering the upper part of the upper shaft D2b (lower peripheral wall 55), and discharged from the outlet (nozzle 13) provided in the upper part (sealing cylinder 12) of the cylinder body B. At this time, in order to guide the liquid squeezed out to the outside of the upper shaft D2b to the nozzle 13, sealing members (upper sealing part 59 and lower sealing part 66) are arranged above and below the nozzle 13 to seal between the outer peripheral surface of the piston and the inner peripheral surface of the cylinder body.

[0010] Therefore, the pump in Patent Document 1 requires the addition of a lower peripheral wall portion 55, an upper sealing portion 59, and a lower sealing portion 66 to the upper part of the cylinder body B and piston D, increasing the number of parts and complicating the structure. Consequently, manufacturing efficiency is reduced.

[0011] In addition, the pump in Patent Document 1 extends the sealing cylinder portion 12 to provide a nozzle 13 in the upper part of the cylinder body B, thus making it larger in the height direction compared to a conventional pump.

[0012] The purpose of this invention is to provide a small pump with a non-moving discharge port.

[0013] Solution for solving the problem

[0014] To achieve the above objectives, the present invention provides a pump that discharges liquid from a container, comprising: a cylinder having an internal space for storing the liquid; a piston with its lower end inserted into the cylinder; a body supporting the cylinder and mounted at the opening of the container; and a nozzle for discharging the liquid from the cylinder to the outside. The piston comprises: an annular lower piston seal and an upper piston seal that are airtightly and slidably in contact with the inner wall of the cylinder; and a flow path that, when the pressure within the cylinder exceeds a predetermined pressure, guides the liquid within the cylinder to the space between the lower and upper piston seals. The body supports the upper part of the cylinder at a position higher than the opening of the container, such that the lower and upper piston seals are positioned above the opening of the container. At least a portion of the nozzle is located on the outer periphery of the body within a range corresponding to the area between the lower and upper piston seals. In the cylinder, between the lower piston seal and the upper piston seal where they are in airtight contact with the inner wall of the cylinder, there is a through hole that connects the cylinder to the nozzle.

[0015] The effects of the invention

[0016] According to the present invention, a small pump with a non-moving discharge port can be provided. Attached Figure Description

[0017] Figure 1This is a cross-sectional view of the pump 1 installed in container 2 according to embodiment 1.

[0018] Figure 2 (a-1) is a top view of pump 1 in embodiment 1, (a-2) is a sectional view, (b) is a sectional view during operation, and (c) is a sectional view during resetting.

[0019] Figure 3 This is a cross-sectional view showing the state of the pump core during the assembly of pump 1 in Embodiment 1.

[0020] Figure 4 (a) is a cross-sectional view of the pump 200 installed in the container according to Embodiment 2, (b) is a cross-sectional view of the pump 300 installed in the container according to Embodiment 3, and (c) is a top view of the pump 300 installed in the container according to Embodiment 3.

[0021] Figure 5 This is a cross-sectional view of the pump 400 installed in container 2 according to embodiment 4. Detailed Implementation

[0022] Hereinafter, a pump according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0023] <<Implementation Method 1>>

[0024] use Figure 1 , Figure 2 (a-1), (a-2), (b), (c) and Figure 3 The structure of pump 1 in this embodiment will be described. Figure 1 This is a cross-sectional view of container 2 with pump 1 installed. Figure 2 (a-1) and (a-2) are the top view and sectional view of pump 1, respectively. Figure 2 (b) is a cross-sectional view of piston 20 during operation. Figure 2 (c) is a cross-sectional view of piston 20 when it is in its reset position. Figure 3 This is a cross-sectional view of the cylinder 10 and piston 20 during the assembly of pump 1.

[0025] like Figure 1 As shown, pump 1 is installed at the opening 2a at the top of container 2 that holds liquid. Pump 1 draws liquid from container 2 and applies pressure to eject it.

[0026] like Figure 2 As shown, the pump 1 is configured to include a cylinder 10, a piston 20, a pressing part 30, a nozzle 60, a main body 40, and a pipe 50.

[0027] The cylinder 10 has an internal space for extracting and storing liquid from the container 2. An opening 13 for extracting liquid from the container 2 is provided at the lower end of the cylinder 10. A ball 11 is disposed in the opening 13, which functions as a valve to prevent backflow of liquid from the cylinder 10 into the container 2. Additionally, a pipe 50 for guiding liquid from the container 2 is connected to the opening 13 at the lower end of the cylinder 10.

[0028] The lower end of the piston 20 is inserted into the cylinder 10. The piston 20 includes: an annular lower piston seal 21; an annular upper piston seal 22; a lower piston shaft 23 that provides axial support for the lower piston seal 21; and an upper piston shaft 24 integrally formed with the upper piston seal. Both the lower piston seal 21 and the upper piston seal 22 are in airtight and slidably contacted relative to the inner wall of the cylinder. The lower end of the upper piston shaft 24 is fixed to the upper end of the lower piston shaft 23.

[0029] A flange 23a is provided on the outer periphery of the lower piston shaft 23, and a lower elastic member 25 is disposed between the flange 23a and the inner wall of the cylinder body 10 near the lower end. The lower elastic member 25 applies an upward force to the lower piston shaft 23 relative to the inner wall of the cylinder body 10. An upper elastic member 26 is disposed between the lower piston seal 21 and the upper piston shaft 24. The upper elastic member 26 applies a downward force to the lower piston seal 21 relative to the upper piston shaft 24. Here, the upper elastic member 26 and the lower elastic member 25 are springs. The spring constant of the upper elastic member 26 is larger than the spring constant of the lower elastic member 25.

[0030] When the user presses the piston 20 downwards, the lower piston seal 21 and the upper piston seal 22 slide down the inner wall of the cylinder 10. At this time, the upper elastic member 26 is not compressed, while the lower elastic member 25 is compressed. As a result, the space inside the cylinder 10 is compressed by the lower piston seal 21. When the pressure inside the cylinder 10 exceeds a predetermined pressure, the upper elastic member 26 is pushed up, and the lower piston seal 21 moves upwards. Thus, as... Figure 2 As shown in (b), a flow path is formed that connects the space below the lower piston seal 21 with the space above the lower piston seal 21.

[0031] The cylinder body 10 is supported by the main body 40 and is mounted on the opening of the container 2. Specifically, the main body 40 is configured to have an annular mounting portion 41 that is mounted on the outer periphery of the opening of the container 2 and a cylindrical portion 42 mounted on the mounting portion 41. Here, the mounting portion 41 is configured to be threadedly engaged with the outer periphery of the opening of the container 2.

[0032] The cylinder body 10 has a locking portion 12 on its upper outer periphery. The locking portion 12 engages with the upper edge of the cylindrical portion 42 of the main body 40, supporting the cylinder body 10 within the cylindrical portion 42. In this embodiment, the cylindrical portion 42 of the main body 40 has a double-layer structure consisting of an inner cylinder 42a and an outer cylinder 42b. A portion of the inner cylinder 42a and the outer cylinder 42b are connected. The locking portion 12 of the cylinder body 10 engages with the upper edge of the inner cylinder 42a.

[0033] Additionally, on the inner wall of the inner cylinder 42a of the cylindrical portion 42 and the outer wall of the cylinder body 10, at the corresponding locations 15 (see reference) Figure 2 (b) has a recess on one side and a protrusion on the other side, and the recess and protrusion fit together. Through this fit, the inner wall of the cylindrical part 42 is sealed to the outer wall of the cylinder body 10.

[0034] Thus, by employing a structure in which a cylindrical portion 42 is provided on the mounting portion 41 and the engaging portion 12 on the upper part of the outer periphery of the cylinder body 10 is engaged with the upper edge of the cylindrical portion, the main body 40 supports the upper part of the cylinder body 10 at a position higher than the opening of the container 2. Consequently, the cylinder body 10 is supported by the main body such that the lower piston seal 21 and the upper piston seal 22 of the piston 20 are positioned above the opening of the container 2. The ball 11 at the lower end of the cylinder body 10 is located at the height of the mounting portion 41 of the main body 40.

[0035] A nozzle 60 is installed on the outer periphery of the outer cylinder 42b of the cylindrical portion 42 of the main body 40 to discharge the liquid inside the cylinder 10 to the outside.

[0036] The nozzle 60 is disposed on the outer periphery of the outer cylinder 42b of the cylindrical portion 42 of the main body 40. The nozzle 60 is positioned between the lower piston seal 21 and the upper piston seal 22. A baffle 61 is disposed inside the nozzle 60 to narrow the flow path 63 within the nozzle 60. As a result, liquid can be ejected from the discharge port 62 at the front end of the nozzle 60.

[0037] The cylinder body 10 is provided with a through hole 16 that connects to the nozzle 60. The through hole 16 is located in the area between the lower piston seal 21 and the upper piston seal 22 and the inner wall of the cylinder body 10 where they are in airtight contact.

[0038] More specifically, the lower end portion 21a of the lower piston seal 21 is in airtight contact with the inner wall of the cylinder 10. The through hole 16 of the cylinder 10 is located above the lower end portion 21a of the lower piston seal 21 and below the upper piston seal 22. Figure 2 In example (a-1), the through hole 16 is located above the lower end 21a of the lower piston seal 21 and below the upper end of the lower piston seal 21.

[0039] The upper end of the main body 40 is covered by a bushing 43. The upper piston shaft 24 passes through the bushing 43 in a manner that allows it to move up and down.

[0040] A pressing part 30 is installed at the upper end of the upper piston shaft 24 to receive the user's operation of pressing the piston downward.

[0041] <Operation of each part of pump 1>

[0042] use Figure 1 , Figure 2 Sections (b) and (c) describe the actions of each part when the liquid in container 2 is ejected by pump 1.

[0043] The mounting part 41 of the main body 40 is fixed around the opening of the container 2 by a threaded engagement.

[0044] The user presses down the upper surface of the pressing part 30. As a result, the piston 20, on which the pressing part 30 is mounted, moves... Figure 2 (b) In this way, the spring 25 is compressed while descending within the cylinder 10.

[0045] Since the nozzle 60 is located on the main body 40, the position of the nozzle 60 will not change even if the pressing part 30 and the piston 20 are lowered.

[0046] As the piston 20 descends, the space 17 within the cylinder 10 is compressed, and pressure is applied to the liquid within the space 17. When the pressure within the space 17 becomes greater than the force exerted by the spring 26 on the lower piston seal 21, the lower piston seal 21 compresses the spring 26 and is pushed upwards.

[0047] This creates a gap between the lower piston seal 21 and the lower piston shaft 23, opening the flow path 27. Liquid within the pressurized space 17 flows directly into the space between the lower piston seal 21 and the upper piston seal 22 through the flow path 27. A through hole 16 is provided between the lower piston seal 21 and the upper piston seal 22 in the cylinder body 10. Therefore, liquid flowing into the space between the lower piston seal 21 and the upper piston seal 22 flows from the through hole 16 of the cylinder body 10 into the nozzle 60 and is discharged from the outlet 62.

[0048] At this time, the lower piston seal 21 and the upper piston seal 22 are in airtight contact with the inner wall of the cylinder 10, so the liquid flowing into the space between the lower piston seal 21 and the upper piston seal 22 is guided to the through hole 16 without leaking out in the vertical direction.

[0049] The nozzle 60 has an internal baffle 61. Therefore, the liquid flowing into the nozzle 60 advances in the narrow flow path 63 between the inner wall of the nozzle 60 and the baffle 61, and is then sprayed out into the external space from the outlet 62. Thus, the liquid can be sprayed out from the outlet 62 as a mist.

[0050] Since the position of nozzle 60 does not change when spraying, the user can spray a mist of liquid toward the target location.

[0051] When the user releases their hand from the pressing part 30, as Figure 2 (c) In this way, the spring 26 presses the lower piston seal 21, closes the flow path 27, and the spring 25 pushes the piston 20 up, and the piston 20 returns to its original position.

[0052] As a result, the space 17 inside the cylinder is expanded, creating a negative pressure within the space 17, which pushes the ball 11 up, causing the opening 13 at the lower end of the cylinder 10 to open. Figure 2 As indicated by the solid arrow in (c), the liquid in container 2 is drawn out by tube 50 and fills the space 17 inside cylinder 10 through opening 13 at the lower end of cylinder 10. Thus, when the user presses down on the pressing part 30 again, the liquid inside cylinder 10 is ejected.

[0053] At this time, as Figure 2 As indicated by the dashed arrow in (c), an air supply passage 44 is provided in the main body 40, which allows external air to be introduced into the container 2 from between the edge of the opening of the container 2 and the outer wall of the cylinder 10. Thus, as the liquid is drawn into the cylinder 10, external air is introduced into the container 2, thereby maintaining the pressure inside the container 2 at atmospheric pressure.

[0054] Furthermore, the position of the nozzle 60 will not change when the piston 20 is reset.

[0055] As described above, in this embodiment, when the pump 1 presses the piston 20 to spray liquid from the nozzle 60, the position of the nozzle 60 does not change. Therefore, for example, when the user wants to spray medicine deep into the throat or spray medicine on the scalp, the user can easily spray the mist of liquid to the target position.

[0056] Furthermore, by positioning the upper part of the cylinder 10 above the opening of the container 2, and by providing a nozzle 60 on the main body 40 at a position corresponding to the lower piston seal 21 and the upper piston seal 22, liquid flowing into the space between the lower piston seal 21 and the upper piston seal 22 can be guided to the through hole 16 without leaking out in the vertical direction.

[0057] Therefore, no additional sealing component is required, reducing the number of parts. Furthermore, the nozzle 60 can be positioned near the opening of the container 2, thus enabling a compact pump 1 in the vertical direction.

[0058] Furthermore, since the pump 1 has a small number of parts and a compact design, it is possible to provide customers with a product that requires less resin to manufacture and takes into account the environment.

[0059] Furthermore, since the lower end of the cylinder 10 is located near the opening of the container 2 and is not deeply inserted into the container 2, the pump 1 can be installed in a shallow, small container 2 to drain the solution inside. Therefore, the pump 1 is also suitable for small containers 2 containing small amounts of liquid. In addition, the amount of resin required to manufacture the small container 2 is small, so the use of the pump 1 of this embodiment is environmentally friendly.

[0060] Furthermore, through the through hole 16 of the cylinder 10, the liquid flowing into the space between the lower piston seal 21 and the upper piston seal 22 can move laterally, thereby guiding it to the nozzle 60 with the shortest possible distance. Therefore, the amount of liquid remaining in the nozzle 60 before the next injection can be minimized.

[0061] Furthermore, in this embodiment, the cylinder 10 and piston 20 are assembled to... Figure 3 After the pump core is in its current state (pump core state), it can be easily assembled simply by engaging the engaging part 12 with the edge of the cylindrical part 42 of the main body 40. Therefore, by pre-assembling and engaging the pump core part, and installing it onto the pressing part 30 and the main body 40 in a color and shape that meets the customer's wishes, the time required before assembly can be shortened, enabling timely delivery within a short delivery period.

[0062] <<Implementation Method 2>>

[0063] use Figure 4 (a) describes the container 2 on which the pump 200 of embodiment 2 is installed.

[0064] The pump 200 in Embodiment 2 has the same structure as the pump 1 in Embodiment 1, but the pump 200 in Embodiment 2 is a droplet pump that discharges liquid as droplets instead of mist. Therefore, the spring constant of the upper elastic member 26 and the construction of the nozzle 60 are different from those in Embodiment 1.

[0065] In Embodiment 2, the upper elastic member 26 of the pump 200 uses a member with a smaller spring constant than that of the upper elastic member 26 in Embodiment 1. Embodiment 2 is the same as Embodiment 1 in that the spring constant of the upper elastic member 26 is larger than that of the lower elastic member 25. Thus, because the spring constant of the upper elastic member 26 is smaller than that in Embodiment 1, the pressure threshold within the cylinder 10 that pushes up the lower piston seal 21 to open the flow path 27 in the pump 200 of Embodiment 2 is smaller than that in the pump 1 of Embodiment 1.

[0066] Furthermore, in the pump of Embodiment 2, the space of the internal flow path 63 of the nozzle 60 is larger than that of Embodiment 1, and the size of the outlet 62 is also larger than that of Embodiment 1.

[0067] Therefore, in the pump of embodiment 2, when the pressure inside the cylinder 10 is lower than that in embodiment 1, the lower piston seal 21 is pushed up to open the flow path 27, and the liquid flows into the space between the lower piston seal 21 and the upper piston seal 22, passes through the through hole 16, and passes through the flow path 63, which is larger than that in embodiment 1, and is discharged as droplets from the outlet 62.

[0068] Thus, since this embodiment is a pump with a lower elastic member 25 and an upper elastic member 26, it is possible to achieve a mist-type pump 1 that sprays out a mist-like liquid as in Embodiment 1 and a drop-type pump 200 that discharges droplets as in Embodiment 2, with the same pump structure but only by changing the spring constant of the upper elastic member 26.

[0069] The pump 200 of Embodiment 2 has the same structure, operation and effect as Embodiment 1. Since the nozzle 60 does not move up and down, the user can discharge droplets toward the desired position.

[0070] The pump 200 of Embodiment 2 has the same other structure as that of Embodiment 1, so the description is omitted.

[0071] <<Implementation Method 3>>

[0072] use Figure 4 (b) and (c) illustrate the container 2 equipped with the pump 300 of embodiment 3.

[0073] The pump 300 of Embodiment 3 is also a drop-type pump like the pump 200 of Embodiment 2, but it is configured such that the nozzle 60 is longer and more curved than that of the pump 200 of Embodiment 2, and the nozzle 60 can rotate relative to the main body 40. By rotating the nozzle 60, the pump 300 of Embodiment 3 can make the central axis of the long nozzle 60 face horizontally or upward.

[0074] In the pump 300 of embodiment 3, the nozzle 60 does not move up and down and is long. Therefore, the user can bring the outlet 62 close to the desired position to discharge droplets, making it easy for the user to spray droplets to the desired location. This is preferred, for example, when the user wants to spray droplets of medicine at a specific location deep in the throat.

[0075] The pump 300 of Embodiment 3 has the same other structure as that of Embodiment 1, so the description is omitted.

[0076] <<Implementation Method 4>>

[0077] use Figure 5 This describes a container 2 equipped with the pump 400 of embodiment 4.

[0078] The pump 400 in Embodiment 4 is also a drop pump like those in Embodiments 2 and 3, but the volume of liquid ejected at one time is larger than that of the pump 200 in Embodiment 2.

[0079] Therefore, the diameter and length of the cylinder 10 are larger than those of the pump 200 in Embodiment 2. Other structures are the same as those of the pump 200 in Embodiment 2.

[0080] The other structures, operations, and effects of the pump 400 in Embodiment 4 are the same as those of the pump 200 in Embodiment 2, so the description is omitted.

[0081] Explanation of reference numerals in the attached figures

[0082] 1 pump

[0083] 2 containers

[0084] 2a Opening

[0085] 10-cylinder block

[0086] 11 balls

[0087] 12 Card-connecting section

[0088] 13 Opening

[0089] 15 parts

[0090] 16 Through holes

[0091] 17 Space

[0092] 20 Pistons

[0093] 21 Lower piston seal

[0094] 21a Lower end

[0095] 22 Upper piston seal

[0096] 23 Lower piston shaft

[0097] 23a Flange

[0098] 24 Upper piston shaft

[0099] 25 Lower elastic member

[0100] 26 Upper elastic member

[0101] 27 flow path

[0102] 30 Pressing section

[0103] 40 main body

[0104] 41 Installation Department

[0105] 42 cylindrical part

[0106] 42a Inner Cylinder

[0107] 42b outer cylinder

[0108] 43 Bushing

[0109] 44 Air supply path

[0110] 50 tubes

[0111] 60 nozzles

[0112] 61 Stop block

[0113] 62 Discharge outlets

[0114] 63 flow path

[0115] 200 pumps

[0116] 300 pumps

[0117] 400 pump.

Claims

1. A pump which discharges liquid in a container, characterized by, The pump has: A cylinder body, which has internal space for storing the liquid in the container; A piston, the lower end of which is inserted into the cylinder body; The main body, which supports the cylinder and is installed at the opening of the container; and The nozzle discharges the liquid inside the cylinder to the outside. The piston includes: an annular lower piston seal and an upper piston seal, which are in airtight and slidably contacting the inner wall of the cylinder; and a flow path that, when the pressure inside the cylinder exceeds a predetermined pressure, guides the liquid inside the cylinder to the space between the lower piston seal and the upper piston seal. The main body supports the upper part of the cylinder at a position higher than the opening of the container, so that the lower piston seal and the upper piston seal are located above the opening of the container. At least a portion of the nozzle is located on the outer periphery of the body within a region corresponding to the lower piston seal and the upper piston seal. In the cylinder, between the positions where the lower piston seal and the upper piston seal respectively make airtight contact with the inner wall of the cylinder, a through hole is provided to connect the cylinder to the nozzle. The piston includes: a piston shaft supporting the lower piston seal and the upper piston seal; a lower elastic member applying an upward force to the piston shaft relative to the inner wall of the cylinder; and an upper elastic member applying a downward force to the lower piston seal relative to the piston shaft. When the pressure inside the cylinder exceeds a specified pressure, the upper elastic member is pushed up, and the lower piston seal moves upward, thereby connecting the space below the lower piston seal with the space above it to form the flow path.

2. The pump according to claim 1, characterized in that, A pressing part is installed at the upper end of the piston to receive the user's operation of pressing the piston downward.

3. The pump according to claim 1, characterized in that, The annular lower piston seal is located at its lower end in airtight contact with the inner wall of the cylinder. The through hole of the cylinder is located above the lower end of the lower piston seal and below the upper end of the lower piston seal.

4. The pump according to claim 1, characterized in that, The main body includes an annular mounting portion installed on the outer periphery of the container opening and a cylindrical portion mounted on the mounting portion. The cylinder body has a locking portion on its outer periphery, which engages with the upper edge of the cylindrical portion to support the cylinder body within the cylindrical portion.

5. The pump according to claim 4, characterized in that, A recess is provided on one side of the inner wall of the cylindrical part and a protrusion is provided on the other side. The recess and the protrusion fit together to seal the inner wall of the cylindrical part and the outer wall of the cylinder.

6. The pump according to claim 1, characterized in that, The main body is provided with an air supply path that allows external air to be introduced into the container from between the edge of the container opening and the outer wall of the cylinder.

7. The pump according to claim 1, characterized in that, A valve is provided at the lower end of the cylinder to prevent liquid from flowing back from the inside of the cylinder into the container.

8. A spray container having a container and a pump installed in an opening of the container, characterized in that, The pump is the pump according to any one of claims 1 to 7.

Images