CN115246536A

CN115246536A - Pressure storage type spray pump and pressure storage type spray device

Info

Publication number: CN115246536A
Application number: CN202210493477.2A
Authority: CN
Inventors: 石志强
Original assignee: Zhongshan Yachuang Packaging Technology Co ltd
Current assignee: Zhongshan Yachuang Packaging Technology Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-10-28

Abstract

A pressure storage type spray pump and a pressure storage type spray device have good sealing effect and can improve continuous spray effect. The piston type air conditioner comprises a main column, a cylinder body, a lower piston, a built-in lower spring or an external spring, and further comprises a storage cylinder, wherein the storage cylinder is arranged in a space surrounded by the main column, the cylinder body and the lower piston and is abutted against the lower piston in the axial direction; the upper end of the built-in upper spring is connected with the storage barrel, the lower end of the built-in upper spring is connected with the upper piston, the upper piston is tightly attached to the inner surface of the storage barrel and can move in the axial direction relative to the storage barrel, an opening for communicating the liquid inlet pore with the storage barrel is formed in the lower piston, the pressure storage type spray pump can be switched between a standby state and a pressing state, the lower piston is tightly attached to the main column in the standby state to block the communication between the liquid storage cavity of the cylinder body and the liquid inlet pore and the opening, and the lower piston is separated from the main column in the axial direction in the pressing state to enable the liquid storage cavity of the cylinder body to be communicated with the liquid inlet pore and the opening.

Description

Pressure storage type spray pump and pressure storage type spray device

Technical Field

The application relates to a pressure storage type spray pump and a pressure storage type spray device.

Background

Currently, push type spray pumps are widely used in daily life of people, and are particularly widely used for products such as daily chemicals, skin care products, cosmetics, and pharmaceuticals.

However, most of the currently marketed spray devices are discontinuously sprayed, and spray is performed once per press. As a result, when spraying is required a plurality of times, pressing is required a plurality of times, which makes the operation cumbersome. On the other hand, in the case of the spray pump of the conventional structure, droplets having a poor atomization effect may drop from the nozzle each time spraying is started or ended. Therefore, in the case of frequent pressing, waste of products may be caused.

Therefore, the applicant of the present application has proposed a pressure storage type spray pump and a pressure storage type spray device (patent document 1: chinese utility model patent 202121322139X). In patent document 1, a pressure accumulating type continuous spray pump and a pressure accumulating type continuous spray device capable of continuously spraying for a predetermined time are realized by adopting a double spring-double piston structure, and the structure is simple.

In this pressure-accumulating type spray pump, in order to prevent the working fluid from flowing to the first spring located above the first piston, the first piston disposed between the main column and the cylinder is in seamless contact with both the inner surface of the cylinder and the outer surface of the main column.

Documents of the prior art

Patent document

Patent document 1: chinese utility model patent 202121322139X

Disclosure of Invention

Technical problem to be solved by the invention

However, during actual manufacture and use, the applicant of the present application found that, since the first piston is in seamless contact with both the inner surface of the cylinder and the outer surface of the main column, the first piston moves upward relative to the main column and the cylinder under the action of the working liquid flowing into the storage chamber while the main column moves downward under the action of the pressing force during pressing.

As a result, the frictional force received by the first piston from the inner surface of the cylinder and the frictional force received by the outer surface of the main column tend to be different in magnitude, resulting in the first piston being skewed during its upward movement, and the seamless close contact with the one is broken, thereby creating a gap through which the working fluid may flow from the reservoir chamber to the first spring.

On the other hand, if the interference dimension between the first piston and the cylinder and the main column is increased in order to enhance the sealing effect, the frictional force between the first piston and the cylinder and the main column becomes larger during the pressing process to offset the larger pressing force, and the first piston cannot move freely in the vertical direction. As a result, the desired continuous spraying effect cannot be achieved.

Meanwhile, in the above-described pressure-storing type spray pump, the fine hole of the main column through which the working fluid flows into the fluid passage and the reservoir chamber are not always in communication, but only in communication when pressed. On the other hand, the ejection effect of the working liquid is closely related to the pressing force of the first spring to the first piston. Considering the first frictional effect, the spray effect is significantly stronger when pressed than when not pressed. In combination with the above structural factors and force factors, the applicant of the present application has found that there is a significant difference between the spray amount when the spray pump is pressed and the spray amount when the pump is not pressed, that is, the spray amount is suddenly high or low, and the continuous spraying effect is not very ideal, and there is room for improvement.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a pressure accumulating type spray pump and a pressure accumulating type spray apparatus having a new structure, which can improve the effect of continuous spraying and reduce the difference between the spray amount at the time of pressing and the spray amount at the time of non-pressing while having a good sealing effect.

Technical scheme for solving technical problem

A first technical scheme of the application provides a pressure storage formula spray pump, includes: a main column having a fluid passage extending in an axial direction therein, and having a liquid inlet pore formed at a lower end thereof to communicate with the fluid passage; the cylinder body is provided with openings at two axial ends, and the main column is inserted into the cylinder body from the upper end of the cylinder body; a lower piston disposed between the cylinder and the main column at a lower end of the main column, the lower piston abutting the cylinder and the main column to form a cylinder liquid reservoir chamber within the cylinder and below the lower piston; and a built-in lower spring disposed in the cylinder body at a position lower than the lower piston in the axial direction, the built-in lower spring having an upper end connected to the main column and a lower end connected to the cylinder body, the built-in lower spring being characterized by further comprising: a storage cylinder disposed in a space surrounded by the main column, the cylinder, and the lower piston, and abutting against the lower piston in the axial direction; and the built-in upper spring and upper piston, the upper end of the built-in upper spring is connected with the storage cylinder, the lower end of the built-in upper spring is connected with the upper piston, the upper piston is tightly attached to the inner surface of the storage cylinder and can move in the axial direction relative to the storage cylinder, the lower piston is provided with an opening for communicating the liquid inlet pore with the storage cylinder, the pressure storage type spray pump can be switched between a standby state and a pressing state, in the standby state, the lower piston is tightly attached to the main column to block the communication between the liquid storage chamber of the cylinder body and the liquid inlet pore and the opening, and in the pressing state, the lower piston is separated from the main column in the axial direction to enable the liquid storage chamber of the cylinder body to be communicated with the liquid inlet pore and the opening.

A second technical aspect of the present application provides another pressure storage type spray pump, including: a main column having a fluid passage extending in an axial direction therein, and having a liquid inlet pore formed at a lower end thereof to communicate with the fluid passage; the cylinder body is provided with openings at two axial ends, and the main column is inserted into the cylinder body from the upper end of the cylinder body; a lower piston disposed between the cylinder and the main column at a lower end of the main column, abutting the cylinder and the main column, thereby forming a cylinder reservoir chamber within the cylinder and below the lower piston; and the external spring is configured outside the cylinder body, the upper end of the external spring is connected with the main column in a synchronous motion mode, and the lower end of the external spring is fixedly connected with the cylinder body, and the external spring is characterized by further comprising: a storage cylinder disposed in a space surrounded by the main column, the cylinder, and the lower piston, and abutting against the lower piston in the axial direction; and the built-in upper spring and upper piston, the upper end of the built-in upper spring is connected with the storage cylinder, the lower end of the built-in upper spring is connected with the upper piston, the upper piston is tightly attached to the inner surface of the storage cylinder and can move in the axial direction relative to the storage cylinder, the lower piston is provided with an opening for communicating the liquid inlet pore with the storage cylinder, the pressure storage type spray pump can be switched between a standby state and a pressing state, in the standby state, the lower piston is tightly attached to the main column to block the communication between the liquid storage chamber of the cylinder body and the liquid inlet pore and the opening, and in the pressing state, the lower piston is separated from the main column in the axial direction to enable the liquid storage chamber of the cylinder body to be communicated with the liquid inlet pore and the opening.

According to the first and second aspects, as compared with the above-described prior art, by providing the storage cylinder to store the built-in upper spring and the upper piston inside thereof, the storage cylinder functions as a seal for preventing the working fluid from flowing out, instead of the first piston in the above-described prior art. According to this configuration, in the process of pressing down the main column, since the storage cylinder moves together with the main column, relative movement between the two does not occur, and therefore, sufficient sealing performance can be ensured.

According to the first and second aspects, compared with the prior art, the space on the lower side of the upper piston of the storage cylinder is always communicated with the liquid inlet pore through the opening formed in the lower piston. Therefore, even in the non-pressed state, a certain amount of spray can be ensured. Therefore, it is possible to ensure a better continuous spraying effect without generating an excessive difference between the spraying amount in the pressed state and the spraying amount in the non-pressed state.

In addition, a third technical scheme of this application still provides a pressure storage formula atomizer, includes:

the pressure storage type spray pump according to the first or second aspect; and the pressing head is matched with the main column of the pressure storage type spray pump to apply force to the main column along the axial direction.

Drawings

Fig. 1 is a sectional view of a pressure accumulating type atomizer including a pressure accumulating type atomizer pump according to a first embodiment of the present invention, showing the pressure accumulating type atomizer pump in a standby state.

Fig. 2 shows an exploded view of the pressure accumulating type atomizer shown in fig. 1, showing components of the pressure accumulating type atomizer.

Fig. 3 is a sectional view of a pressure accumulating type atomizer including the pressure accumulating type atomizer pump shown in fig. 1 in a pressed state.

Fig. 4 is a sectional view of a pressure accumulating type atomizer including the pressure accumulating type atomizer pump shown in fig. 1 in a rebound continuous spray state.

Fig. 5 is a sectional view of a pressure accumulating type atomizer including a pressure accumulating type atomizer pump according to a second embodiment of the present invention, showing the pressure accumulating type atomizer pump in a standby state.

Fig. 6 is an exploded view showing the pressure accumulating type atomizing device shown in fig. 5, and shows each component of the pressure accumulating type atomizing pump.

Fig. 7 is a sectional view of a pressure accumulating type atomizer including the pressure accumulating type atomizing pump shown in fig. 5 in a pressed state.

Fig. 8 is a sectional view of a pressure accumulating type atomizer including the pressure accumulating type atomizer pump shown in fig. 5 in a rebound continuous-jet state.

Description of the symbols

A. A1: pressure storage type spray pump

P: pressure storage type spraying device

S: main column

S1: fluid passage

S2: main column flange part

C: storage barrel

CC: storage chamber

1: press head

2: spray nozzle

3: upper pull rod

4: cover member

5: gasket

6: middle sleeve

7: spring barrel

7A: large diameter part

7B: small diameter part

7C: axial through hole

7D: radial through hole

8: built-in upside spring

9: upside piston

10: piston seat

10A: piston seat flange

10B: pore for liquid feeding

11: lower piston

11A: opening holes

11B: inner flange part

11C: outer flange part

11D: performing an extension

12: built-in underside spring

12A: external spring

13: cylinder body

13A: major diameter section of thick bamboo portion

13B: middle diameter cylinder part

13C: small diameter cylinder

M: cylinder liquid storage cavity

14: wave bead

15: suction tube

16: bottle body

Detailed Description

[ first embodiment ]

The pressure accumulating type spray pump according to the first embodiment of the present invention will be described below with reference to fig. 1 to 4.

Fig. 1 shows a sectional view of a pressure-storing type atomizer P including a pressure-storing type atomizer pump a of the first embodiment, and fig. 2 shows an exploded view of the pressure-storing type atomizer. As shown in fig. 1 and 2, the pressure reservoir type spray device P includes a push head 1, a cap member 4, a pressure reservoir type spray pump a, and a bottle 16. As shown in fig. 1, the assembled pressure-storing type spray pump a (more precisely, a part of the pressure-storing type spray pump a) is inserted into the bottle 16 through a gasket 5 and disposed therein, and a cap member 4 to which a push head 1 having a nozzle hole 2 disposed therein is attached is fitted over the pressure-storing type spray pump a and the bottle 16 and is fastened to the bottle 16 by, for example, screwing. Thereby, the pressure storage type atomizer P is formed. In the present embodiment, the cap member 4 is a screw cap having a thread formed on the inner surface thereof, but the form thereof is not limited thereto, and may be any form as long as it can be fixedly connected to the vial 16.

The pressure storage type spray pump A comprises a cylinder 13, a main column S, a storage cylinder C, an internal upper spring 8, an upper piston 9, a lower piston 11, an internal lower spring 12, and a bead wave 14.

The cylinder 13 is a cylindrical member having both ends opened in the axial direction, and includes a large diameter cylinder portion 13A, a medium diameter cylinder portion 13B, and a small diameter cylinder portion 13C, the large diameter cylinder portion 13A constitutes an upper half portion in the axial direction of the cylinder 13, the medium diameter cylinder portion 13B and the small diameter cylinder portion 13C constitute a lower half portion in the axial direction of the cylinder 13, and a step portion is formed at an interface between the large diameter cylinder portion 13A and the medium diameter cylinder portion 13B, and at the interface between the medium diameter cylinder portion 13B and the small diameter cylinder portion 13C. Further, a flange portion 13D projecting in a radial direction perpendicular to the axial direction is formed at an axial upper end portion of the cylinder 13, that is, an axial upper end portion of the large diameter cylinder portion 13A, and the cylinder 13 is disposed so that a part thereof is inserted into the inside of the vial 16 by placing the flange portion 13D in an opening portion of the vial 16 with the spacer 5 interposed therebetween. A suction tube 15 for sucking up the working fluid from the vial 16 is inserted into the small diameter tube portion 13C. A bead 14 is disposed at a step portion between the small diameter cylinder portion 13C and the medium diameter cylinder portion 13B. In the standby state and the pressed state (which may include the latter half of the rebound continuous jet state) described later, the beads 14 close the opening between the step portion and the small diameter tube portion 13C, and in the rebound continuous jet state (which may include only the former half of the rebound continuous jet state) described later, the beads 14 are pushed up by the working liquid to open the opening.

The main column S comprises an upper pull rod 3 and a piston seat 10, the upper pull rod forms the axial upper half part of the main column S, and the piston seat 10 forms the axial lower half part of the main column S. The main column S is formed by assembling the upper rod 3 and the piston seat 10, and a fluid passage S1 communicating with the nozzle hole 2 of the push head 1 is formed inside the main column S. Specifically, an upper end in the axial direction of the upper rod S is inserted and fixed into the push head 1, and an lower end in the axial direction is connected to the piston seat 10, and a column flange S2 is provided at a middle portion of the upper rod S, and in a standby state described later, the column flange S2 is positioned at a position in contact with the member 4 and spaced apart from the storage tube C by a predetermined distance. The upper end of the piston holder 10 in the axial direction is connected to the upper rod 3, and the lower end in the axial direction is formed with a piston holder flange 10A against which the lower piston 11 is axially abutted. A liquid inlet pore 10B communicating with the fluid passage S1 is formed in a side wall of a lower end of the piston seat 10. Furthermore, the axially lower end of the piston seat 10 is closed.

The lower piston 11 is disposed between the large-diameter cylindrical portion 13A of the cylinder 13 and the piston holder 10 and is disposed so as to axially abut against the piston holder flange 10A of the piston holder 10. Thereby, a cylinder reservoir chamber M for storing the working fluid is formed between the lower piston 11, the piston seat 10, and the cylinder 13. As shown in fig. 1, the lower piston 11 has an opening 11A communicating with the liquid inlet pore 10B of the piston holder 10, and the opening 11A communicates with the inside of the storage cylinder C. The lower piston 11 includes an inner flange portion 11B, an outer flange portion 11C, and a radially extending portion 11D connecting the inner flange portion 11B and the outer flange portion 11C, as shown in fig. 1.

The built-in lower spring 12 is provided inside the cylinder 13 at a position axially below the lower piston 11, and the axial upper end of the built-in lower spring 12 is connected to the axial lower end of the piston holder 10, and the axial lower end thereof is connected to the inner surface of the intermediate diameter cylinder portion 13B. Thereby, the built-in lower spring 12 can be deformed in the axial direction in the case of pressing the main column S or releasing the main column S.

The housing tube C is disposed axially above the lower piston 11 and between the cylinder 13 and the main column S. That is, the storage cylinder C is disposed in a space surrounded by the lower piston 11, the cylinder 13, and the main column S. The storage tube C includes the middle sleeve portion 6 and the spring tube portion 7, and is configured by assembling the middle sleeve portion 6 and the spring tube portion 7 as shown in fig. 1. The spring cylinder portion 7 includes a large diameter portion 7A and a small diameter portion 7B, an upper spring 8 and an upper piston 9 are disposed in the large diameter portion 7A, an axial through hole 7C extending in the axial direction and a radial through hole 7D orthogonal to the axial through hole 7C are formed in the small diameter portion 7B, and the axial through hole 7C and the radial through hole 7D communicate the opening 11A with the inside of the storage cylinder C. The large diameter portion 7A is in close contact with the inner surface of the cylinder portion S, the outer surface of the upper rod 3, and the inner flange portion 11B of the lower piston 11 without any gap to perform a sealing function. The small diameter portion 7B axially abuts a radially extending portion 11D of the lower piston 11.

The built-in upper spring 8 is disposed in the large diameter portion 7A of the spring cylinder 7, and has an axially upper end connected to an end of the large diameter portion 7A and an axially lower end connected to the upper piston 9.

The upper piston 9 is movable in the axial direction within the large diameter portion 7A of the spring cylinder 7. A reservoir chamber CC is formed between the upper piston 9 and the lower end of the large diameter portion 7A, and the volume of the reservoir chamber CC changes according to the amount of the working fluid entering and stored in the storage tube C.

Next, based on the above-described configuration, the operation state and operation of the pressure storage type spray pump a according to this embodiment will be described in detail with reference to fig. 1 to 4.

(Standby state)

The pressure-accumulating type spray pump a shown in fig. 1 is in a standby state (non-pressed state). In the standby state, in the accumulator type spray pump a, both the built-in upper spring 8 and the built-in lower spring 12 are in a naturally extended state (i.e., are not stretched nor compressed). The main column flange S2 of the upper rod 3 of the main column S contacts the inner surface of the top of the lid member 4, and is spaced apart from the middle sleeve 6 of the storage tube C by a predetermined distance. Both side wall portions of the large diameter portion 7A of the spring cylinder portion 7 of the storage cylinder C are in close contact with the inner wall surface of the cylinder 13, the outer wall surface of the upper rod 3, and the inner flange portion 11B of the lower piston 11 without any gap, and the axial lower end portion of the small diameter portion 7B is in axial contact with the radially extending portion 11D of the lower piston 11. The lower piston 11 is in close contact with the piston seat flange 10A of the piston seat 10 of the main column S without any gap in the axial direction. In this way, the reservoir chamber CC, which is a space located below the upper piston 9 in the storage tube 7, is always in communication with the fluid passage S1 of the main column S via the axial through hole 7C and the radial through hole 7D of the small-diameter portion 7B, the opening 11A of the lower piston 11, and the liquid inlet pore 10B of the piston seat 10. On the other hand, since the lower piston 11 is in close contact with the piston seat flange 10A of the piston seat 10 of the main column S without a gap in the axial direction, the cylinder liquid storage chamber M of the cylinder 13 is not communicated with the storage chamber CC in the storage tube 7 and the fluid passage S1 of the main column S, and the working fluid stored in the cylinder liquid storage chamber M cannot reach the storage chamber CC and the fluid passage S1. However, since the reservoir chamber CC and the fluid passage S1 are always in communication as described above, the working liquid stored in the reservoir chamber CC can always flow into the fluid passage S1 in the presence of the downward pressure of the upper spring 8. The beads 14 are seated in and close the opening between the middle diameter tube portion 13B and the small diameter tube portion 13C, and the working fluid is blocked from flowing from the vials 16 into the cylinder reservoir chamber M of the cylinder 13.

(pressing state)

Fig. 3 shows a sectional view of the pressure storage type spray pump a in a pressed state. As shown in fig. 3, in the pressed state, the pressing head 1 is moved downward by a predetermined distance by the pressing force. Since the upper end of the upper rod 3 of the main column S is fixedly connected to the plunger 1, the main column S moves by the predetermined distance along with the plunger 1 against the elastic pressure of the built-in lower spring 12, and the main column flange S2 of the main column S abuts against the upper surface of the middle sleeve 6 of the storage cylinder C. Before the main column flange portion S2 abuts against the upper surface of the middle sleeve 6, the pressing force acting on the push head 1 does not act on the storage case C and the lower piston 11 via the main column S, and therefore, the main column S moves downward in the axial direction by the predetermined distance with respect to the storage case C and the lower piston 11, and the lower piston 11 and the piston seat flange 10A of the piston seat 10, which are originally in close contact with each other, are separated in the axial direction, so that a gap of a certain width is formed, and the cylinder reservoir chamber M is in fluid communication with the fluid passage S1 and the reservoir chamber CC of the storage case C via the fluid inlet fine hole 10B, the opening 11A, the radial through hole 7D, and the axial through hole 7C, respectively. Next, after the main column flange S2 of the main column S abuts on the upper surface of the middle sleeve 6 of the storage cylinder C, the storage cylinder C moves downward in the axial direction together with the push head 1 and the main column S by the pressing force applied to the push head 1. Since the small diameter portion 7B of the spring cylinder portion 7 of the housing C axially abuts the radially extending portion 11D of the lower piston 11, the lower piston 11 also moves downward in the axial direction together with the housing C. Here, we assume that the cylinder reservoir chamber M of the cylinder 13 has been filled with the working fluid and the air has been substantially discharged by pressing a plurality of times. As the lower piston 11 moves downward, the hydraulic fluid in the cylinder chamber M receives an external force to compress it. It is known that, in a fluid-mechanical sense, a liquid is regarded as an incompressible fluid (i.e., very small in compressibility), and therefore, the working liquid is forced to flow into a gap formed between the lower piston 11 and the piston seat flange 10A of the piston seat 10. Further, a part of the working fluid flows into the reservoir chamber CC in the container C through the radial through hole 7D and the axial through hole 7C, and another part of the working fluid flows into the fluid passage S1 through the liquid inlet fine hole 10B and is discharged from the nozzle 2. However, since a part of the working fluid flows into the reservoir chamber CC in the housing C, the upper piston 9 moves upward in the axial direction against the elastic pressure of the built-in upper spring 8 by the inflow pressure of the working fluid, and the volume of the reservoir chamber CC increases, and the working fluid stored therein increases. At the same time, since the working fluid in the cylinder reservoir chamber M is compressed, the opening is closed by the beads 14 by the fluid pressure of the compressed working fluid, and the working fluid in the vial 16 cannot enter the cylinder 13 through the suction tube 15.

Unlike the prior art, a three-way state is formed in which the reservoir chamber CC of the container C, the fluid passage S1 of the main column S, and the cylinder reservoir chamber M of the cylinder 13 are in fluid communication in the pressed state. That is, a part of the working liquid is stored in the storage cylinder C, and the other part is discharged from the nozzle 2 through the fluid passage S1. Thus, continuous spraying starts in the pressed state.

(rebound continuous spray state)

After the pressing action is finished, the pressing head 1 is released, so that the pressure storage type spray pump A is changed into a rebound continuous spraying state from a pressing state. Fig. 4 shows a sectional view of the pressure-accumulating type atomizing pump a in the rebound continuous-injection state. As shown in fig. 4, in the rebound continuous injection state, since the pressing force originally acting on the main column S disappears, the main column S moves upward in the axial direction by the restoring force of the built-in lower spring 12, and the piston seat flange 10A of the piston seat 10 comes into contact with the lower piston 11 again. At the same time, the main column flange S2 of the main column S is separated from the upper surface of the middle sleeve 6 of the storage tube C, and again comes into contact with the inner surface of the lid member 4. In this way, the gap formed between the piston seat flange 10A and the lower piston 11 in the pressed state disappears, and the three-way state in which the reservoir chamber CC of the storage tube C, the fluid passage S1 of the main column S, and the cylinder reservoir chamber M of the cylinder 13 are in fluid communication is changed to the two-way state in which only the fluid passage S1 of the main column S and the reservoir chamber CC of the storage tube C are in communication. However, even if the fluid communication between the cylinder reservoir chamber M and the reservoir chamber CC of the cartridge C and the fluid passage S1 is blocked, the spray is continuously performed, and the spray amount in the rebound continuous spray state is not decreased much compared to the pressed state, and the continuity of the spray can be ensured. This is because, even if the fluid communication is blocked, the reservoir chamber CC of the reservoir C and the fluid passage S1 of the main column S are always kept in communication, and therefore, as long as the built-in upper spring 8 does not return to the naturally extended length, the working fluid stored in the reservoir chamber CC flows into the fluid passage S1 through the axial through hole 7C, the radial through hole 7D, the opening 11A, and the liquid inlet fine hole 10B by the downward pressure of the upper piston 9, and is continuously discharged from the nozzle hole 2 through the fluid passage S1. Specifically, since the three-way state is changed to the two-way state, only the fluid passage S1 of the main column S is in fluid communication with the reservoir chamber CC of the cartridge C. Then, the built-in upper spring 8 tries to return to its natural length by the pressure difference between them, thereby pushing the upper piston 9 to move downward in the axial direction. The working fluid stored in the reservoir chamber CC can flow only into the fluid passage S1 by the depression force of the upper piston 9. In addition, even in the rebound continuous spray state, since the reservoir chamber CC of the storage cylinder C is always in communication with the fluid passage S1 of the main column S, the spray is continued until the built-in upper spring 8 is restored to the natural length. As a result, compared with the above-described conventional technique, the difference between the spray effect at the time of pressing and the spray effect at the time of non-pressing is not so large, and a more excellent continuous spray effect can be obtained.

[ second embodiment ]

The pressure accumulating type spray pump A1 according to the second embodiment of the present invention will be described below with reference to fig. 5 to 8. The second embodiment is different from the first embodiment only in that an external spring 12A is provided instead of the internal lower spring 12.

In the first embodiment, the built-in lower spring 12 is immersed in the working fluid for a long period of time. In consideration of practical use, ease of manufacture, and manufacturing cost, the built-in lower spring 12 is sometimes made of a plastic such as silicone rubber, polyethylene, or a blend of polypropylene and a long-chain olefin. However, since the working fluid tends to be a corrosive chemical mass, the built-in lower spring 12 tends to be corroded. In order to solve the problem of corrosion, the lower spring 12 may be made of a corrosion-resistant metal such as stainless steel. However, since the spray pump is often disposable, there are problems of excessive waste and excessive manufacturing costs.

Therefore, as shown in fig. 5 to 8, an external spring 12A is provided outside the cylinder 13 between the main column S (or the push head 1) and the cover member 4, instead of the built-in lower spring 12 which is originally provided in the cylinder reservoir chamber M of the cylinder S. Specifically, the external spring 12A has an axially upper end connected to the plunger 1 and an axially lower end connected to the upper surface of the distal end of the cover member 4. In this manner, when the push head 1 is pushed, the upper end of the external spring 12A moves downward in the axial direction together with the push head 1 and the main column S, and the external spring 12A is pushed. In the present embodiment, the case where the upper end of the external spring 12A is connected to the plunger 1 has been described, but the present invention is not limited thereto, and the upper end of the external spring 12A may be connected so as to be capable of moving in synchronization with the main column S. For example, the upper end of the external spring 12A may be connected to the main post S.

With the above configuration, not only the same technical effects as those of the first embodiment can be obtained, but also the corrosion of the elastic member can be avoided while achieving continuous spraying, and the service life can be prolonged.

In the second embodiment, the external spring 12A and/or the internal upper spring 8 are preferably made of silicone rubber. More preferably, the external springs 12A and/or the internal side springs 8 are made of polyethylene or polypropylene blended with a long chain polyolefin.

The present disclosure has been described above based on the first embodiment and the second embodiment, but it should be understood that the present disclosure is not limited to the above-described examples and configurations. The present disclosure also includes various modifications and variations within the equivalent scope. In addition, various combinations and modes, including only one element, one or more other combinations and modes, also belong to the scope and the idea of the present disclosure.

Claims

1. A pressure storage spray pump comprising:

a main column (S) having a fluid passage (S1) extending in an axial direction therein, and having a liquid inlet pore (10B) formed at a lower end thereof and communicating with the fluid passage;

a cylinder (13) having both axial ends open for the main column to be inserted from the upper end of the cylinder to the inside;

a lower piston (11) disposed between the cylinder and the main column at a lower end of the main column, in abutment with the cylinder and the main column, thereby forming a cylinder reservoir chamber (M) within the cylinder and below the lower piston; and

an internal lower spring (12) disposed in the cylinder below the lower piston in the axial direction, having an upper end connected to the main column and a lower end connected to the cylinder, the internal lower spring being characterized by further comprising:

a storage cylinder (C) disposed in a space surrounded by the main column, the cylinder, and the lower piston, and abutting against the lower piston in the axial direction; and

a built-in upper spring (8) and an upper piston (9), the upper end of the built-in upper spring is connected with the containing cylinder, the lower end of the built-in upper spring is connected with the upper piston, the upper piston is in close contact with the inner surface of the containing cylinder and can move in the axial direction relative to the containing cylinder,

the lower piston is provided with an opening (11A) which enables the liquid inlet pore and the containing cylinder to be communicated,

the pressure storage type spray pump can be switched between a standby state and a pressing state,

in the standby state, the lower piston is tightly attached to the main column to block the communication between the liquid storage cavity of the cylinder body and the liquid inlet pore and the opening,

in the pressed state, the lower piston is separated from the main column in the axial direction to allow the cylinder reservoir chamber to communicate with the liquid inlet pores and the opening.

2. A pressure storage spray pump comprising:

an external spring (12A) disposed outside the cylinder body, having an upper end connected to the main column in a manner of synchronous movement and a lower end fixedly connected to the cylinder body, characterized by further comprising:

a built-in upper spring (8) and an upper piston (9), the upper end of the built-in upper spring is connected with the containing cylinder, the lower end of the built-in upper spring is connected with the upper piston, the upper piston is closely attached to the inner surface of the containing cylinder and can move in the axial direction relative to the containing cylinder,

the lower piston is formed with an opening (11A) for communicating the liquid inlet pore with the storage cylinder,

3. The pressure storage type spray pump according to claim 2,

the built-in upper side spring and/or the external spring are/is made of silicon rubber.

4. A pressure accumulating spray pump according to claim 3,

the built-in upper side spring and/or the built-in outer side spring are formed by blending polyethylene or polypropylene and poly-long chain olefin.

5. A pressure storing type spraying device, comprising:

the pressure storage type spray pump of any one of claims 1 to 4; and

the pressing head (1) is matched with a main column of the pressure storage type spray pump to apply force to the main column along the axial direction.

6. A pressure accumulating spray pump apparatus according to claim 5,

the cylinder head further comprises a cover member (4) which accommodates a part of the cylinder body into which the main column is inserted.

7. A pressure storing atomizing device according to claim 6,

the cover member is a screw cap having a screw thread formed on an inner wall thereof.