Pressure accumulator type spray pump and pressure accumulator type spray device

Abstract

The pressure accumulator spray pump has a simple and compact structure, is low-cost and can realize continuous spraying, and has good safety performance. The pressure accumulator spray pump includes a main pillar and a cylinder body, and a fluid passage extending along the axial direction is formed inside the main pillar, and the cylinder body contains hydraulic fluid. The pressure accumulator spray pump further includes a check valve mechanism, a storage chamber, and an upper elastic mechanism, and the storage chamber is formed between the check valve mechanism and the upper elastic mechanism, and the check valve mechanism is configured to open only when the main pillar is pressed and to only allow hydraulic fluid to flow from the cylinder body to the storage chamber, and the upper elastic mechanism is displaceable between an initial position and a maximum compression position with respect to the main pillar, and is configured to displace toward the maximum compression position when the main pillar is pressed to fluidly communicate the storage chamber and the fluid passage, and to displace toward the initial position when the main pillar is released.

Description

Technical Field

[0001] The present invention relates to a pressure accumulator type spray pump and a pressure accumulator type spray device.

Background Art

[0002] In recent years, squeeze-type spray pumps have been widely used in daily life, and are particularly widely applied to products such as daily chemicals, skin care products, cosmetics, and pharmaceuticals.

[0003] However, many of the spray devices currently used in the market are of discontinuous spraying that sprays every time they are squeezed. Therefore, when multiple sprays are required, the operation becomes complicated. In addition, every time the spraying starts and ends, spray droplets with poor atomization effect drip from the nozzle, so frequent squeezing leads to waste of the product.

[0004] Therefore, two continuous spraying technologies have been proposed currently. One is the FlairR technology (for example, International Publication WO2012-061764A1) developed by AFA Dispensing Group that can achieve continuous spraying, and the other is to adopt an aerosol (gas propellant) to achieve the effect of continuous spraying.

Prior Art Documents

Patent Documents

[0005] Patent Document 1: International Publication WO2012-061764A1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, when adopting the FlairR technology, the internal structure of the spray pump becomes complicated and its volume also becomes huge, thereby increasing the production cost and price of this spray pump.

[0007] On the one hand, when realizing continuous spraying by an aerosol, since this aerosol generally contains an organic alkane gas as a gas propellant, the spraying device adopting this technology has problems in safety and also has a high production and manufacturing cost.

[0008] The present invention is made to solve the above technical problems, and an object thereof is to provide a pressure accumulator type spray pump and a pressure accumulator type spraying device that can realize continuous spraying with a simple and small structure, low cost, and have good safety performance.

Means for Solving the Problems

[0009] The pressure accumulator type spray pump according to the first aspect of the present invention includes a main column and a cylinder body. Inside the main column, a fluid passage extending along the axial direction is formed. The cylinder body accommodates the working fluid and the main column is inserted therein. This pressure accumulator type spray pump further includes a check valve mechanism disposed between the main column and the cylinder body along the axial direction, a storage chamber, and an upper elastic mechanism. The storage chamber is formed between the check valve mechanism and the upper elastic mechanism. The check valve mechanism is configured to open only when pressing the main column and to allow only the working fluid to flow from the cylinder body into the storage chamber. The upper elastic mechanism is displaceable between an initial position and a maximum compression position with respect to the main column, and is configured to displace toward the maximum compression position when pressing the main column to fluidly communicate the storage chamber and the fluid passage, and to displace toward the initial position when releasing the main column.

[0010] Based on the pressure accumulator type spray pump according to the first aspect of the present invention, in the pressure accumulator type spray pump according to the second aspect of the present invention, preferably, the check valve mechanism A second piston that is disposed along the axial direction with the upper elastic mechanism sandwiching the storage chamber therebetween, fixed to the main column, and has a through hole formed therein that penetrates the second piston along the axial direction; A second elastic body that connects the main column and the cylinder body along the axial direction, or connects the second piston and the cylinder body along the axial direction; An elastic separator configured to cover the through hole, and By pressing the main column, the elastic separator deforms to open the through hole.

[0011] Based on the accumulator type spray pump according to the second aspect of the present invention, in the accumulator type spray pump according to the third aspect of the present invention, preferably, a plurality of the through holes are formed at equal intervals in the circumferential direction in the second piston.

[0012] Based on the accumulator type spray pump according to the first aspect of the present invention, in the accumulator type spray pump according to the fourth aspect of the present invention, preferably, The check valve mechanism An annular second piston disposed along the axial direction with the upper elastic mechanism sandwiching the storage chamber therebetween, and A second spring that connects the main column and the cylinder body along the axial direction, and A groove extending along the axial direction is formed on the inner surface of the second piston, An annular flange protruding radially inward is formed at an end of the second piston away from the storage chamber, and the annular flange is in close contact with the outer surface of the main column without a gap in the radial direction of the main column. By pressing the main column, the annular flange is separated from the outer surface of the main column, and the cylinder body and the storage chamber are in fluid communication through the groove.

[0013] Based on the accumulator type spray pump according to the fourth aspect of the present invention, in the accumulator type spray pump according to the fifth aspect of the present invention, preferably, a plurality of the grooves are formed at equal intervals in the circumferential direction on the inner surface of the second piston.

[0014] Based on the accumulator type spray pump according to the first aspect of the present invention, in the accumulator type spray pump according to the sixth aspect of the present invention, preferably, The check valve mechanism An annular second piston disposed along the axial direction and sandwiching the storage chamber with the upper elastic mechanism; A sub-column fixed to an end of the main column close to the second piston and in close contact with the second piston without a gap in the axial direction; And a second spring connecting the sub-column and the cylinder body along the axial direction. A groove extending along the axial direction is formed on the inner surface of the second piston. By pressing the main column, the second piston is separated from the sub-column, and the cylinder body and the storage chamber are in fluid communication through the groove.

[0015] Based on the accumulator type spray pump according to the sixth aspect of the present invention, in the accumulator type spray pump according to the seventh aspect of the present invention, preferably, a plurality of the grooves are formed at equal intervals along the circumferential direction on the inner surface of the second piston.

[0016] Based on the accumulator type spray pump according to any one of the first to seventh aspects of the present invention, in the accumulator type spray pump according to the eighth aspect of the present invention, preferably, A small hole communicating with the fluid passage is formed in the side wall of the main column. When the upper elastic mechanism is in the initial position, the small hole is closed by the upper elastic mechanism. By pressing the main column, the small hole is opened to put the storage chamber and the fluid passage in fluid communication.

[0017] Based on the accumulator type spray pump according to the eighth aspect of the present invention, in the accumulator type spray pump according to the ninth aspect of the present invention, preferably, the plurality of small holes are formed in the side wall of the main column at equal intervals along the circumferential direction.

[0018] Based on the accumulator type spray pump according to any one of the second aspect to the seventh aspect of the present invention, in the accumulator type spray pump according to the tenth aspect of the present invention, preferably, a stopper portion is formed on a surface of the second piston close to the upper elastic mechanism, and the stopper portion is configured to receive the upper elastic mechanism and position the upper elastic mechanism at the initial position.

[0019] Based on the accumulator type spray pump according to any one of the second aspect to the eighth aspect of the present invention, in the accumulator type spray pump according to the eleventh aspect to the thirteenth aspect of the present invention, preferably, the upper elastic mechanism is disposed between the main column and the cylinder body, and includes a first piston that faces the second piston across the storage chamber along the axial direction, and a first elastic body that connects the main column and the first piston along the axial direction.

[0020] The fourteenth aspect of the present invention relates to an accumulator type spray device, an accumulator type spray pump according to any one of the first aspect to the thirteenth aspect, and a pressing type spray head that cooperates with the accumulator type spray pump to urge the main column of the accumulator type spray pump along the axial direction.

[0021] Based on the accumulator type spray device according to the fourteenth aspect of the present invention, in the accumulator type spray device according to the fifteenth aspect of the present invention, preferably, it further includes a cover component configured to house the cylinder body into which the main column is inserted.

[0022] Based on the accumulator type spray device according to the fifteenth aspect of the present invention, in the accumulator type spray device according to the sixteenth aspect of the present invention, preferably, the cover component is a threaded cap having threads formed on an inner wall.

Advantages of the Invention

[0023] According to the present invention, a pressure accumulator type spray pump and a pressure accumulator type spray device including the pressure accumulator type spray pump can be provided, which can achieve simple and small-sized structures, continuous and non-stop spraying at low cost, and have good safety performance. In addition, since the present invention can achieve continuous and non-stop spraying, the working fluid can be uniformly sprayed onto the object.

Brief Description of the Drawings

[0024]

Figure 1

Figure 2

Figure 3

Figure 4A

Figure 4B

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8

Figure 9A

Figure 9B

Figure 10

Figure 11

Figure 12

Figure 13A

Figure 13B

Figure 14A

Figure 14B

Figure 15

Figure 16

Embodiments for Carrying Out the Invention

[0025] Hereinafter, with reference to the drawings, the accumulator type spray pump and the structure of the accumulator type spray pump according to each embodiment of the present invention will be described in detail.

[0026] -First Embodiment- FIG. 1 is a perspective view showing a pressure accumulator type spray device A including a pressure accumulator type spray pump P1 according to the first embodiment of the present invention. As shown in FIG. 1, the pressure accumulator type spray device A includes a push-type spray head 1, a cover component C, a pressure accumulator type spray pump P1, and a suction pipe 2. The push-type spray head 1 can adopt a commercially available ordinary spray head, and the user can manually press the push-type spray head 1 to spray. This push-type spray head 1 is fitted into the cover component C, and the cover component C is a component for fixing the pressure accumulator type spray device A to a bottle body (not shown). In the present embodiment, the cover component C is a thread cap having a thread C1 formed on the inner wall surface, and is connected to the bottle body to be used with the pressure accumulator type spray device A by cooperating with a thread formed on the mouth of the bottle. Note that the cover component C is used because the pressure accumulator type spray pump P1 described later is disposed inside thereof. Further, a suction pipe 2 is connected to the lower end portion of the pressure accumulator type spray pump P1, and this suction pipe 2 is used to supply a working fluid (spraying liquid) from inside the bottle to a cylinder body 3 described later of the pressure accumulator type spray pump P1.

[0027] FIG. 2 is a perspective view showing the accumulative pressure type spray pump P1 according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view showing the accumulative pressure type spray device A including the accumulative pressure type spray pump P1 according to the first embodiment of the present invention. As shown in FIGS. 2 and 3, the accumulative pressure type spray pump P1 includes a cylinder body 3 and a main column 4. The cylinder body 3 is a cylindrical component with openings at the upper and lower ends, and has a large diameter portion 31, a small diameter portion 32, and a liquid inlet portion 33. A part of the main column 4 described later, a part of the check valve mechanism described later, and the upper elastic mechanism described later are accommodated in the large diameter portion 31. Another part of the check valve mechanism described later and a steel ball B are accommodated in the small diameter portion 32. The suction pipe 2 is inserted into the liquid inlet portion 33. As shown in FIG. 3, the cylinder body 3 is fixed to the cover component C by a fitting method. The main column 4 is a thin cylindrical component with an open upper end and a closed lower end. As shown in FIG. 3, a fluid passage 41 for gas or working fluid to flow is formed inside it. An annular flange portion 42 is formed over the entire circumference at a substantially intermediate portion of the main column 4 along the axial direction of the main column 4. This flange portion 42 is used to fix the first spring 6 described later that constitutes the upper elastic mechanism of the present embodiment. Further, a small hole 43 penetrating the side wall of the main column 4 along the radial direction is formed at a portion near the lower end portion of the main column 4 in the axial direction. The air or working fluid that enters and is stored in the storage chamber M described later enters the fluid passage 41 through this small hole 43 and is ejected to the outside at high speed from the fluid passage 41 through the pressure type spray head 1.

[0028] In order to realize the accumulative pressure type spray effect, the accumulative pressure type spray pump P1 further includes a first check valve mechanism and an upper elastic mechanism that constitute a check valve type accumulative pressure unit.

[0029] Specifically, in this embodiment, as shown in FIG. 3, the upper elastic mechanism includes a first piston 5 and a first spring 6 as an example of the first elastic member. The first piston 5 is an annular component disposed between the cylinder body 3 and the main column 4. Its inner surface is in close contact with the outer surface of the main column 4 without any radial gap, and its outer surface is in close contact with the inner wall surface of the cylinder body 3 without any radial gap. That is, air or hydraulic fluid can hardly flow from below the first piston 5 upward, nor can it flow from below the first piston 5 downward. The first spring 6 is disposed along the axial direction, with one end connected to the flange portion 42 and the other end connected to the first piston 5. In the above manner, the first piston 5 and the first spring 6 constitute the upper elastic mechanism of this embodiment.

[0030] On the other hand, as also shown in FIG. 3, the first check valve mechanism includes a second piston 7A, a second spring 8A, and an elastic separator 9.

[0031] Regarding the second piston 7A, FIG. 4A is a perspective view showing the second piston 7A, and FIG. 4B is a cross-sectional view showing the second piston 7A. As shown in FIGS. 3, 4A, and 4B, the second piston 7A is a substantially annular component disposed between the cylinder body 3 and the main column 4, and has a hollow main body portion 7A1, an upper flange portion 7A2, and a side flange portion 7A3. The upper flange portion 7A2 is formed at the upper end of the main body portion 7A1 and protrudes radially outward. The side flange portion 7A3 is formed at the radially outer edge of the upper flange portion 7A2 and extends downward along the axial direction. When the second piston 7A is disposed between the cylinder body 3 and the main column 4, the inner peripheral surface of the main body portion 7A1 is in close contact with the outer surface of the main column 4 without any radial gap, and the side flange portion 7A3 is in close contact with the inner wall surface of the cylinder body 3 without any radial gap. As shown in FIGS. 4A and 4B, a plurality (here, four) of through holes 10 penetrating the upper flange portion 7A2 along the axial direction are formed in the second piston 7A. These through holes 10 are used to fluidly connect the small-diameter portion 32 of the cylinder body 3 and a storage chamber M described later. And the hole diameter of the through hole 10 is much larger than the hole diameter of the fine hole 43.

[0032] The second spring 8A is arranged along the axial direction, one end of which is connected to the end of the main column 2, and the other end of which is connected to the end of the cylinder body 3.

[0033] Also, regarding the elastic separator 9, FIG. 5A is a perspective view showing the elastic separator 9, and FIG. 5B is a cross-sectional view showing the elastic separator 9. As shown in FIGS. 5A and 5B, the elastic separator 9 is a hollow substantially disk-shaped component, which is arranged between the cylinder body 3 and the main column 4 as shown in FIG. 3, and is arranged adjacent to the upper side of the second piston 7A. It has a hollow columnar portion 91 and an annular plate portion 92. This annular plate portion 92 is formed along the entire outer peripheral surface of the columnar portion 91, and is formed in a shape that inclines downward as it moves away from the columnar portion 91 in the radial direction. The annular plate portion 92 is composed of an elastic thin plate and is axially elastically deformable with respect to the columnar portion 91. As shown in FIG. 3, when the elastic separator 9 is arranged between the cylinder body 3 and the main column 4, the columnar portion 91 is supported by the upper surface of the second piston 7A (exactly, the main body portion 7A1), and the annular plate portion 92 covers the through hole 10 from above.

[0034] In the above manner, the second piston 7A, the second spring 8A, and the elastic separator 9 constitute the first check valve mechanism of the present embodiment.

[0035] As shown in FIG. 3, when the upper elastic mechanism and the check valve mechanism constituting the check valve type accumulator unit of the present embodiment are arranged between the cylinder body 3 and the main column 4, a storage chamber M with variable volume is formed between the cylinder body 3 and the main column 4. Specifically, as air or hydraulic fluid flows into the storage chamber M, the volume of the storage chamber M increases, but as air or hydraulic fluid flows out of the storage chamber M, the volume of the storage chamber M decreases. This point will be described in detail later.

[0036] Next, based on the above structure, referring to FIGS. 3, 6, and 7, the operating principle of the accumulator type spray pump P1 and the accumulator type spray device A of the present embodiment will be described in detail.

[0037] Figure 3 is a cross-sectional view showing the accumulator type spray pump P1 in its initial state. In the initial state, the first piston 5 contacts the columnar portion 91 of the elastic separator 9 to close the small hole 43, preventing the storage chamber M from communicating with the fluid passage 41 of the main column 4.

[0038] When the accumulator type spray pump P1 and the accumulator type spray device A of the present embodiment are used for the first time, there may be air in the storage chamber M and the space near the lower part of the second piston 7A in the cylinder body 3 (hereinafter referred to as the lower chamber LM). First, by pressing the pressing type spray head 1, the main column 2 connected to the pressing type spray head 1 and the second piston 7A connected to the main column 2 are moved downward along the axial direction, overcoming the second spring 8A. At this time, since the steel ball B closes the connection port between the small diameter portion 32 and the liquid inlet portion 33, the air in the lower chamber LM cannot be discharged from below.

[0039] At the same time, the air in the lower chamber LM is compressed, and the pressure in the lower chamber LM becomes higher than the pressure in the storage chamber M. Therefore, as shown in Figure 6, due to the action of the pressure difference, the annular plate portion 92 of the elastic separator 9 deforms upward to open the through hole 10, and the air in the lower chamber LM flows into the storage chamber M. Then, with the inflow of air, the first piston 5 moves upward along the axial direction, overcoming the first spring 6, and the small hole 43 originally closed by the side surface of the first piston 5 is opened, fluidly connecting the storage chamber M and the fluid passage 41 in the main column 4. The air located in the storage chamber M flows into the fluid passage through the small hole 43. However, since the hole diameter of the through hole 10 is much larger than the hole diameter of the small hole 43, the amount of air flowing from the lower chamber LM into the storage chamber M per unit time is larger than the amount of air flowing from the storage chamber M into the fluid passage 41 per unit time. Looking at the entire pressing process, the volume of the storage chamber M increases, and the first piston 5 continuously moves upward along the axial direction, overcoming the first spring 6.

[0040] When the upper elastic mechanism is displaced to the maximum compression position (for example, the compression deformation of the first spring 6 reaches the maximum elastic compression position, or the lower end of the pressing spray head 1 abuts against the cover component C), when the pressing spray head 1 is pressed until, the pressing spray head 1 is released. At this time, under the action of the restoring force of the second spring 8A, the main column 2 and the second piston 7A move upward along the axial direction. And since the pressure in the storage chamber M is greater than the pressure in the lower chamber LM, the annular plate portion 92 of the elastic separator 9 returns to the initial state and closes the through hole 10. That is, the accumulator spray device A transfers from the pressing state in FIG. 6 to the released state in FIG. 7. At the same time, under the action of the restoring force of the first spring 6, until the first piston 5 moves to the initial position where it abuts against the columnar portion 91 of the elastic separator 9 and closes the fine hole 43, the first piston 5 moves downward to urge the air in the storage chamber M, and the air flows into the fluid passage 41 more quickly through the fine hole 43. Thereby, the accumulator spray device A returns from the released state in FIG. 7 to the initial state in FIG. 3. On the other hand, during the release, since the pressure in the liquid inlet portion 33 is greater than the pressure in the lower chamber LM, the steel ball B is pushed upward, and air or the working liquid continuously flows from the liquid inlet portion 33 into the lower chamber LM. Thereby, the working liquid is stored in the lower chamber LM.

[0041] By repeating the pressing and releasing of the pressing spray head 1 as described above, the lower chamber LM is filled with the working liquid.

[0042] Next, by pressing the pressing spray head 1, the main column 2 connected to the pressing spray head 1 and the second piston 7A connected to the main column 2 are moved downward along the axial direction against the second spring 8A. At this time, since the steel ball B closes the connection port between the small diameter portion 32 and the liquid inlet portion 33, the working liquid in the lower chamber LM cannot be discharged from below.

[0043] At this time, since the working fluid has the property that it can hardly be compressed, when the working fluid in the lower chamber LM is pushed out, the liquid pressure in this lower chamber LM is greater than the pressure in the storage chamber M. Therefore, as shown in FIG. 6, due to the action of the pressure difference, the annular plate portion 92 of the elastic separator 9 deforms upward to open the through hole 10, and the working fluid in the lower chamber LM flows into the storage chamber M. Then, as the working fluid flows in, the first piston 5 moves upward along the axial direction overcoming the first spring 6, and the small hole 43 originally closed by the side surface of the first piston 5 is opened, fluidly connecting the storage chamber M and the fluid passage 41 in the main column 4, and the working fluid located in the storage chamber M flows into the fluid passage through the small hole 43. However, since the hole diameter of the through hole 10 is much larger than the hole diameter of the small hole 43, the amount of the working fluid flowing from the lower chamber LM into the storage chamber M per unit time is larger than the amount of the working fluid flowing from the storage chamber M into the fluid passage 41 per unit time. Looking at the whole pressing process, the volume of the storage chamber M increases, and the first piston 5 continuously moves upward along the axial direction overcoming the first spring 6.

[0044] At the same time, due to the incompressibility of the working fluid, the steel ball B is always in a closed state, and the working fluid in the liquid inlet 33 cannot flow into the lower chamber LM.

[0045] When the upper elastic mechanism is displaced to the maximum compression position (for example, the compression deformation of the first spring 6 reaches the maximum elastic compression position, or the lower end of the pressing spray head 1 abuts against the cover component C), and the pressing spray head 1 is pressed until then, the pressing spray head 1 is released. At this time, under the action of the restoring force of the second spring 8A, the main column 2 and the second piston 7A move upward along the axial direction, so that the pressure in the lower chamber LM is formed into a negative pressure. Therefore, the annular plate portion 92 of the elastic separator 9 returns to the initial state and closes the through hole 10. That is, the pressure accumulator spray device A transfers from the pressing state in FIG. 6 to the released state in FIG. 7. At the same time, under the action of the restoring force of the first spring 6, until the first piston 5 moves to the initial position where it abuts against the columnar portion 91 of the elastic separator 9 and closes the fine hole 43, the first piston 5 moves downward to urge the working fluid in the storage chamber M, and the working fluid flows into the fluid passage 41 more quickly through the fine hole 43. Thereby, the pressure accumulator spray device A returns from the released state in FIG. 7 to the initial state in FIG. 3. On the other hand, since the pressure in the lower chamber LM is formed into a negative pressure, the steel ball B is pushed upward, and the working fluid continuously flows into the lower chamber LM from the liquid inlet portion 33. Thereby, the lower chamber LM is always filled with the working fluid.

[0046] As described above, the hole diameter of the through hole 10 is much larger than the hole diameter of the fine hole 43, and the amount of the working fluid flowing from the lower chamber LM to the storage chamber M per unit time is larger than the amount of the working fluid flowing from the storage chamber M to the fluid passage 41 per unit time. Therefore, by pressing and releasing once or a plurality of times, the working fluid can continuously eject to the outside from the storage chamber M through the fine hole 43 and the fluid passage 41. That is, based on the above structure, the effect of continuous spraying can be realized by pressing and releasing once or a plurality of times.

[0047] -Technical Effects of the First Embodiment- The difference from the conventional spraying device is that, in this embodiment, a pressure accumulator type spray pump P1 including a cylinder body 3, a main column 4, and a check valve type pressure accumulator unit is adopted. The check valve type pressure accumulator unit includes a first check valve mechanism and an upper elastic mechanism. Here, the upper elastic mechanism includes a first piston 5 and a first spring 6, and the first check valve mechanism includes a second piston 7A having a through hole 10, a second spring 8A, and an elastic separator 9 for opening and closing the through hole 10.

[0048] By pressing the pressing type spray head 1, the annular plate portion 92 of the elastic separator 9 deforms upward, the through hole 10 is opened, and the working fluid in the lower chamber LM of the cylinder body 3 can flow into the storage chamber M between the first piston 5 and the second piston 7A. At the same time, the first piston 5 moves upward under the pressure action of the working fluid flowing into the storage chamber M, and the volume of the storage chamber M continuously increases. Next, by releasing the pressing type spray head 1, the annular plate portion 9 of the elastic separator 9 returns to the initial state, and the through hole 10 is closed. Then, the first piston 5 moves downward under the action of the first spring 6 in the compressed state, and the second piston 7A moves upward under the action of the second spring 8A in the compressed state, so that pressure is applied to the working fluid, and the working fluid flows into the fluid passage 41 through the fine holes 43 formed in the side wall of the main column 4, and can be continuously ejected to the outside from the fluid passage 41. In this way, by repeatedly pressing and releasing the pressing type spray head 1, more and more working fluid can be stored in the storage chamber M, thereby extending the spraying time and realizing the effect of continuous spraying.

[0049] That is, compared with the pressure accumulator type spraying technology having a complicated structure in the prior art, in this embodiment, a first check valve mechanism with a simple structure is adopted, and due to the characteristics of this first check valve mechanism, by repeatedly pressing and releasing the spray head, the effect of continuous spraying can be easily realized.

[0050] In addition, compared with the conventional non-pressure accumulator spraying technology, the working fluid can be sprayed onto the object more uniformly. Specifically, for example, when cleaning the glass of a window, if a non-pressure accumulator spraying device is adopted, it is necessary to spray at different positions of the glass respectively. As a result, due to changes in factors such as pressing force, the spraying amount at each position may be different and uneven. In contrast, by adopting the pressure accumulator spraying technology of the present invention, just by moving the spraying device, the working fluid can cover the entire glass. And since this spraying process is not affected by the pressing force, as long as it is ensured that the spraying device is moved at a constant speed, the working fluid can be sprayed uniformly over the entire glass.

[0051] -Second Embodiment- Next, referring to FIGS. 8, 9A and 9B, the structure of the pressure accumulator spraying pump P2 of the second embodiment of the present invention will be described. It should be noted that the difference between this embodiment and the first embodiment lies in the structure of the second check valve mechanism, and other than that, it is the same as the structure of the pressure accumulator spraying pump P1 of the first embodiment. Therefore, here, only the structure of the second check valve mechanism of this embodiment will be described, and the description of other parts will be omitted.

[0052] FIG. 8 is a cross-sectional view showing the pressure accumulator spraying pump P2 of the second embodiment of the present invention. As shown in FIG. 8, the pressure accumulator spraying pump P2 of this embodiment includes a cylinder body 3, a main column 4, a second check valve mechanism constituting a check valve type pressure accumulator unit, and an upper elastic mechanism. The difference from the first check valve mechanism of the first embodiment is that the second check valve mechanism includes a second piston 7B and a second spring 8B.

[0053] Regarding the second piston 7B, Fig. 9A is a perspective view showing the second piston 7B, and Fig. 9B is a cross-sectional view showing the second piston 7B. As shown in Figs. 8, 9A and 9B, the second piston 7B is a substantially annular component disposed between the cylinder body 3 and the main column 4. The second piston 7B is installed at a distance from the main column 4 and has a hollow main body portion 7B1, an upper flange portion 7B2, a side flange portion 7B3, and a plurality (here, four) of stopper portions 7B4. The upper flange portion 7B2 is formed at the upper end of the main body portion 7B1 and protrudes radially outward. The side flange portion 7B3 is formed at the radially outer edge of the upper flange portion 7B2 and extends downward along the axial direction. The plurality of stopper portions 7B4 protrude upward along the axial direction and are formed on the upper surface of the upper flange portion 7B2. As shown in Figs. 9A and 9B, an annular flange 7B5 protruding radially inward is formed at the lower end portion of the main body portion 7B1, and this annular flange 7B5 is used to closely adhere to the outer surface of the main column 2, which will be described later. A plurality of grooves 11 extending along the axial direction are formed on the inner surface of the main body portion 7B1, and the plurality of grooves 11 are used to allow air or working fluid to flow into the storage chamber M through these grooves. In a state where the second piston 7B is disposed between the cylinder body 3 and the main column 4, the annular flange 7B5 of the main body portion 7B1 closely adheres to the outer surface of the main column 4 without a radial gap to block the fluid communication between the storage chamber M and the lower chamber LM, and the side flange portion 7B3 closely adheres to the inner wall surface of the cylinder body 3 without a radial gap.

[0054] Regarding the second spring 8B, as shown in Fig. 8, the second spring 8B is disposed along the axial direction, one end is connected to the end of the main column 2, and the other end is connected to the end of the cylinder body 3.

[0055] Based on the above structure, referring to Figs. 8, 10 and 11, the operating principle of the second check valve mechanism of the present embodiment will be described. Here, to avoid repetition of the description, only the situation of the working fluid will be described.

[0056] FIG. 8 is a cross-sectional view showing the accumulator type spray pump P2 in the initial state. In the initial state, the first piston 5 contacts the stopper portion 7B4 of the second piston 7B to close the small hole 43, and the storage chamber M and the fluid passage 41 of the main column 4 are not communicated with each other.

[0057] First, by pressing the pressing type spray head 1, the main column 2 connected to the pressing type spray head 1 is moved downward along the axial direction by overcoming the second spring 8B. At this time, since the steel ball B closes the connection port between the small diameter portion 32 and the liquid inlet portion 33, the working fluid in the lower chamber LM cannot be discharged from below.

[0058] At this time, at the same time, since the main column 2 moves downward with respect to the second piston 7B, the annular flange 7B5 of the second piston 7B that was originally in close contact with each other is separated from the outer surface of the main column 2, so that a gap is generated between the second piston 7B and the main column 4. As a result, the working fluid in the lower chamber LM flows into the storage chamber M along a plurality of grooves 11 formed on the inner surface of the second piston 7B through this gap. Then, with the inflow of the working fluid, the first piston 5 moves upward along the axial direction by overcoming the first spring 6, and the small hole 43 originally closed by the side surface of the first piston 5 is opened, and the storage chamber M and the fluid passage 41 in the main column 4 are fluidly communicated, and the working fluid located in the storage chamber M flows into the fluid passage through the small hole 43. However, since the hole diameter of the through hole 10 is much larger than the hole diameter of the small hole 43, the amount of the working fluid flowing from the lower chamber LM into the storage chamber M per unit time is larger than the amount of the working fluid flowing from the storage chamber M into the fluid passage 41 per unit time. Looking at the entire pressing process, the volume of the storage chamber M increases, and the first piston 5 continuously moves upward along the axial direction by overcoming the first spring 6.

[0059] At the same time, due to the incompressibility of the working fluid, the steel ball B is always in a closed state, and the working fluid in the liquid inlet 33 cannot flow into the lower chamber LM.

[0060] When the upper elastic mechanism is displaced to the maximum compression position (for example, the compression deformation of the first spring 6 reaches the maximum elastic compression position, or the lower end of the pressing type spray head 1 abuts against the cover component C), pressing the pressing type spray head 1 until then, the pressing type spray head 1 is released. At this time, under the action of the second spring 8B, the main column 4 moves upward along the axial direction, and the annular flange 7B5 of the second piston 7B is in close contact with the outer surface of the main column 4 without any gap, and the gap between them disappears, so that the working fluid in the lower chamber LM cannot flow into the storage chamber M. That is, the pressure accumulator type spray device A transfers from the pressing state in FIG. 10 to the released state in FIG. 11. At the same time, under the action of the restoring force of the first spring 6, until the first piston 5 moves to the initial position where it abuts against the stopper portion 7B4 of the second piston 7B and closes the small hole 43, the first piston 5 moves downward to urge the working fluid in the storage chamber M, and the working fluid flows into the fluid passage 41 more quickly through the small hole 43. Thereby, the pressure accumulator type spray pump P2 restores from the released state in FIG. 11 to the initial state in FIG. 8. On the other hand, since the gap between the main column 4 and the second piston 7B disappears, a negative pressure is formed in the lower chamber LM, the steel ball B is pushed upward, and the working fluid continuously flows into the lower chamber LM from the liquid inlet portion 33. Thereby, the lower chamber LM is always filled with the working fluid.

[0061] As described above, the hole diameter of the through hole 10 is much larger than the hole diameter of the small hole 43, and the amount of the working fluid flowing from the lower chamber LM to the storage chamber M per unit time is larger than the amount of the working fluid flowing from the storage chamber M to the fluid passage 41 per unit time. Therefore, by pressing and releasing once or multiple times, the working fluid can continuously eject to the outside through the small hole 43 and the fluid passage 41 from the storage chamber M. That is, based on the above structure, the effect of continuous spraying can be realized by pressing and releasing once or multiple times.

[0062] -Technical Effects of the Second Embodiment- In this embodiment, a check valve mechanism with a simple structure is adopted, and the same technical effects as those of the first embodiment can also be realized.

[0063] - Third Embodiment - Next, referring to FIGS. 12, 13A, 13B, and 14, the structure of the accumulator type spray pump P3 according to the third embodiment of the present invention will be described. It should be noted that the difference between this embodiment and the first and second embodiments lies in the structure of the third check valve mechanism, and other than that, it is the same as the structures of the accumulator type spray pump P1 of the first embodiment and the accumulator type spray pump P2 of the second embodiment. Therefore, here, only the structure of the third check valve mechanism of this embodiment will be described, and the description of other parts will be omitted.

[0064] FIG. 12 is a cross-sectional view showing the accumulator type spray pump P3 according to the third embodiment of the present invention. As shown in FIG. 12, the accumulator type spray pump P3 of this embodiment includes a cylinder body 3, a main column 4, a third check valve mechanism constituting a check valve type accumulator unit, and an upper elastic mechanism. The difference from the first check valve mechanism of the first embodiment and the second check valve mechanism of the second embodiment is that the third check valve mechanism includes a second piston 7C, a second spring 8C, and an auxiliary column 12.

[0065] Regarding the second piston 7C, Fig. 13A is a perspective view showing the second piston 7C, and Fig. 13B is a cross-sectional view showing the second piston 7C. As shown in Figs. 12, 13A and 13B, the second piston 7C is a substantially annular component disposed between the cylinder body 3 and the main column 4. The second piston 7B is installed at a distance from the main column 4 and has a hollow main body portion 7C1, an upper flange portion 7C2, and a side flange portion 7C3. The upper flange portion 7C2 is formed at the upper end of the main body portion 7C1 and protrudes radially outward. The side flange portion 7C3 is formed at the radially outer edge of the upper flange portion 7C2 and extends downward along the axial direction. As shown in Figs. 13A and 13B, a plurality of grooves 11 extending along the axial direction are formed on the inner surface of the main body portion 7C1. The plurality of grooves 11 are used to allow air or working fluid to flow into the storage chamber M through these grooves. When the second piston 7C is disposed between the cylinder body 3 and the main column 4, the lower end portion of the main body portion 7B1 is in close contact with a sub-column 12 to be described later without any gap in the axial direction, blocking the fluid communication between the storage chamber M and the lower chamber LM. The side flange portion 7C3 is in close contact with the inner wall surface of the cylinder body 3 without any gap in the radial direction.

[0066] Regarding the second spring 8C, as shown in Fig. 12, the second spring 8C is disposed along the axial direction. One end is connected to a sub-column 12 to be described later, and the other end is connected to the end of the cylinder body 3.

[0067] Regarding the sub-column 12, Fig. 14A is a perspective view showing the sub-column 12, and Fig. 14B is a cross-sectional view showing the sub-column 12. As shown in Figs. 14A and 14B, the sub-column 12 has an axially inserted portion 12A and a radially flange portion 12B. The axially inserted portion 12A is a portion that is inserted into a notch formed at the end of the main column 2 along the axial direction shown in Fig. 12. The radially flange portion 12B is a portion for closely contacting the lower end portion of the main body portion 7C1 of the second piston 7C without any gap in the axial direction.

[0068] Based on the above structure, the operation principle of the third check valve mechanism of the present embodiment will be described with reference to Figures 12, 15 and 16. Here, in order to avoid repetition, only the state of the working fluid will be described.

[0069] 12 is a cross-sectional view showing the accumulator type spray pump P3 in the initial state. In the initial state, the first piston 5 contacts the upper flange portion 7C2 of the second piston 7C to close the narrow hole 43, thereby preventing communication between the storage chamber M and the fluid passage 41 of the main pillar 4. The sub pillar 12 is fixed to the main pillar 4 by being inserted into the notch of the main pillar 4.

[0070] First, by pressing the pressure type spray head 1, the main column 2 connected to the pressure type spray head 1 and the sub column 12 fixed to the main column 2 are moved downward along the axial direction, overcoming the second spring 8C. At this time, the steel ball B closes the connection port between the small diameter part 32 and the liquid inlet part 33, so the working fluid in the lower chamber LM cannot be discharged from below.

[0071] At this time, simultaneously, since the main column 2 and the auxiliary column 12 move downward with respect to the second piston 7C, the lower end portion of the main body portion 7C1 of the second piston 7C that was originally in close contact with each other is separated from the radial flange portion 12B of the auxiliary column 12, thereby generating a gap between the second piston 7C and the auxiliary column 12. As a result, the working fluid in the lower chamber LM flows into the storage chamber M along a plurality of grooves 11 formed on the inner surface of the second piston 7B through this gap. Then, with the inflow of the working fluid, the first piston 5 moves upward along the axial direction overcoming the first spring 6, and the small hole 43 originally closed by the side surface of the first piston 5 is opened, fluidly connecting the storage chamber M and the fluid passage 41 in the main column 4, and the working fluid located in the storage chamber M flows into the fluid passage through the small hole 43. However, since the hole diameter of the through hole 10 is much larger than the hole diameter of the small hole 43, the amount of working fluid flowing from the lower chamber LM into the storage chamber M per unit time is larger than the amount of working fluid flowing from the storage chamber M into the fluid passage 41 per unit time. Looking at the entire pressing process, the volume of the storage chamber M increases, and the first piston 5 continuously moves upward along the axial direction overcoming the first spring 6.

[0072] At the same time, due to the incompressibility of the working fluid, the steel ball B is always in a closed state, and the working fluid in the liquid inlet 33 cannot flow into the lower chamber LM.

[0073] When the upper elastic mechanism is displaced to the maximum compression position (for example, the compression deformation of the first spring 6 reaches the maximum elastic compression position, or the lower end of the pressing type spray head 1 abuts against the cover part C), and the pressing type spray head 1 is pressed until then, the pressing type spray head 1 is released. At this time, by the action of the second spring 8C, the main column 4 and the auxiliary column 12 move upward along the axial direction, and the lower end of the main body part 7C1 of the second piston 7C is in close contact with the radial flange part 12B of the auxiliary column 12 without any gap, and the gap between them disappears, so that the working fluid in the lower chamber LM cannot flow into the storage chamber M. That is, the accumulator type spray device A transfers from the pressing state in FIG. 15 to the released state in FIG. 16. At the same time, by the action of the restoring force of the first spring 6, the first piston 5 moves downward until the first piston 5 abuts against the stopper part 7B4 of the second piston 7B and closes the small hole 43, and biases the working fluid in the storage chamber M, and makes the working fluid flow into the fluid passage 41 faster through the small hole 43. Thereby, the accumulator type spray pump P3 restores from the released state in FIG. 16 to the initial state in FIG. 12. On the other hand, since the gap between the main column 4 and the second piston 7B disappears, the pressure in the lower chamber LM is formed into a negative pressure, the steel ball B is pushed upward, and the working fluid continuously flows into the lower chamber LM from the liquid inlet part 33. Thereby, the lower chamber LM is always filled with the working fluid.

[0074] As described above, the hole diameter of the through hole 10 is much larger than the hole diameter of the small hole 43, and the amount of the working fluid flowing from the lower chamber LM to the storage chamber M per unit time is larger than the amount of the working fluid flowing from the storage chamber M to the fluid passage 41 per unit time. Therefore, by pressing and releasing once or a plurality of times, the working fluid can continuously spray out to the outside through the small hole 43 and the fluid passage 41 from the storage chamber M. That is, based on the above structure, the effect of continuous spraying can be realized by pressing and releasing once or a plurality of times.

[0075] -Technical effects of the third embodiment- In this embodiment, a check valve mechanism with a different simple structure is adopted, and the same technical effects as those of the first embodiment and the second embodiment can also be achieved.

[0076] -Other Embodiments- As described above, the accumulator type spray pump and the accumulator type spray device according to the first to third embodiments of the present invention have been described. However, the structure of the present invention is not limited to the above embodiments, and further improvements can be made based on the above embodiments.

[0077] For example, in the above first embodiment, preferably, a plurality of through holes are formed at equal intervals in the circumferential direction of the second piston. Thereby, the air or the working fluid in the lower chamber LM can be uniformly introduced into the storage chamber M by the storage chamber M, and the second piston and the annular plate portion of the elastic separator can be kept receiving force uniformly, and the inclined holding of the elastic separator can be avoided.

[0078] For example, in the above second embodiment and the third embodiment, preferably, a plurality of the grooves are formed at equal intervals along the circumferential direction on the inner surface of the second piston. Thereby, the air or the working fluid in the lower chamber LM can be uniformly introduced into the storage chamber M by the storage chamber M, and the second piston can be kept receiving force uniformly.

[0079] For example, in the above first to third embodiments, preferably, a plurality of small holes are formed at equal intervals in the entire circumferential direction of the side wall of the main column 4. Thereby, the air or the working fluid in the storage chamber M can be uniformly introduced into the fluid passage 41 along the entire circumferential direction of the main column 4, and the spraying effect can be further enhanced.

[0080] Note that within the scope of the present invention, the embodiments can be freely combined, or each embodiment can be appropriately modified and omitted.

Explanation of Reference Numerals

[0081] A Accumulator type spray device P1, P2, P3 Pressure - type spray pump 1 Press - type spray head 2 Suction pipe C Cover part C1 Screw 3 Cylinder body 31 Large - diameter part 32 Small - diameter part 33 Liquid inlet part B Steel ball 4 Main column 41 Fluid passage 42 Flange part 43 Small hole 5 First piston 6 First spring 7A, 7B, 7C Second piston 8A, 8B, 8C Second spring 9 Elastic separator 91 Columnar part 92 Annular plate part 10 Through - hole 7A1, 7B1, 7C1 Body part 7A2, 7B2, 7C2 Upper flange part 7A3, 7B3, 7C3 Side flange part 7B4 Stopper part 7B5 Annular flange 11 Groove 12 Sub - column 12A Axial insertion part 12B Radial flange part M Storage chamber LM Lower chamber

Claims

1. A pressure accumulator type spray pump (P2) including a main column (4) having a fluid passage (41) formed therein extending along the axial direction, and a cylinder body (3) containing hydraulic fluid and into which the main column (4) is inserted, further including a check valve mechanism disposed between the main column (4) and the cylinder body (3) along the axial direction, a storage chamber (M), and an upper elastic mechanism, The storage chamber (M) is formed between the check valve mechanism and the upper elastic mechanism, The check valve mechanism is configured to open only when the main column (4) is pressed and to allow only the hydraulic fluid to flow from the cylinder body (3) into the storage chamber (M), The upper elastic mechanism is displaceable between an initial position and a maximum compression position with respect to the main column (4), and is configured to displace toward the maximum compression position when the main column (4) is pressed to fluidly connect the storage chamber (M) and the fluid passage (41), and to displace toward the initial position when the main column (4) is released, The check valve mechanism includes an annular second piston (7B) disposed along the axial direction and sandwiching the storage chamber (M) with the upper elastic mechanism, and a second spring (8B) connecting the main column (4) and the cylinder body (3) along the axial direction, A groove (11) extending along the axial direction is formed on the inner surface of the second piston (7B), An annular flange (7B5) protruding radially inward is formed at an end of the second piston (7B) away from the storage chamber (M), and the annular flange (7B5) is in close contact with the outer surface of the main column (4) without a gap in the radial direction of the main column (4), By pressing the main column (4), the annular flange (7B5) is separated from the outer surface of the main column (4), and the cylinder body (3) and the storage chamber (M) are in fluid communication through the groove (11). A pressure accumulator type spray pump (P2) characterized by this.

2. The pressure accumulator type spray pump (P2) according to claim 1, wherein a plurality of the grooves (11) are formed at equal intervals along the circumferential direction on the inner surface of the second piston (7B).

3. A small hole (43) communicating with the fluid passage (41) is formed in the side wall of the main column (4), When the upper elastic mechanism is located at the initial position, the small hole (43) is closed by the upper elastic mechanism, The pressure accumulator type spray pump (P2) according to claim 1 or 2, wherein by pressing the main column (4), the small hole (43) is opened to fluidly connect the storage chamber (M) and the fluid passage (41).

4. The pressure accumulator type spray pump (P2) according to claim 3, wherein the plurality of small holes (43) are formed in the side wall of the main column (4) at equal intervals along the circumferential direction.

5. A stopper portion (7B4) is formed on the surface of the second piston (7A, 7B, 7C) close to the upper elastic mechanism, and the stopper portion (7B4) is configured to receive the upper elastic mechanism and position the upper elastic mechanism at the initial position. The pressure accumulator type spray pump (P2) according to claim 1 or 2.

6. The upper elastic mechanism is Disposed between the main column (4) and the cylinder body (3), and a first piston (5) facing the second piston (7A, 7B, 7C) with the storage chamber (M) interposed therebetween along the axial direction, The pressure accumulator type spray pump (P2) according to claim 1 or 2, including a first elastic body (6) connecting the main column (4) and the first piston (5) along the axial direction.

7. The upper elastic mechanism is disposed between the main column (4) and the cylinder body (3), a first piston (5) facing the second pistons (7A, 7B, 7C) across the storage chamber (M) along the axial direction, and a first elastic body (6) connecting the main column (4) and the first piston (5) along the axial direction, the accumulator type spray pump (P2) according to claim 3, characterized in that.

8. The upper elastic mechanism, disposed between the main column (4) and the cylinder body (3), a first piston (5) facing the second pistons (7A, 7B, 7C) across the storage chamber (M) along the axial direction, and a first elastic body (6) connecting the main column (4) and the first piston (5) along the axial direction, the accumulator type spray pump (P2) according to claim 5, characterized in that.

9. An accumulator type spray pump (P3) including a main column (4) having a fluid passage (41) formed therein extending axially, and a cylinder body (3) containing the working fluid and into which the main column (4) is inserted, further including a check valve mechanism disposed between the main column (4) and the cylinder body (3) along the axial direction, a storage chamber (M), and an upper elastic mechanism, the storage chamber (M) is formed between the check valve mechanism and the upper elastic mechanism, the check valve mechanism is configured to open only when the main column (4) is pressed and to allow only the working fluid to flow from the cylinder body (3) into the storage chamber (M), the upper elastic mechanism is displaceable between an initial position and a maximum compression position with respect to the main column (4), and is configured to displace toward the maximum compression position when the main column (4) is pressed to fluidly connect the storage chamber (M) and the fluid passage (41), and to displace toward the initial position when the main column (4) is released, The check valve mechanism, The upper elastic mechanism and an annular second piston (7C) arranged along the axial direction with the storage chamber (M) interposed therebetween, A sub-column (12) fixed to an end of the main column (4) close to the second piston (7C) and in close contact with the second piston (7C) without a gap in the axial direction, And a second spring (8C) connecting the sub-column (12) and the cylinder body (3) along the axial direction, A groove (11) extending along the axial direction is formed on the inner surface of the second piston (7C), By pressing the main column (4), the second piston (7C) is separated from the sub-column (12), and the cylinder body (3) and the storage chamber (M) are in fluid communication through the groove (11). A pressure accumulator type spray pump (P3) characterized by this.

10. A plurality of the grooves are formed at equal intervals along the circumferential direction on the inner surface of the second piston. The pressure accumulator type spray pump (P3) according to claim 9, characterized by this.

11. A small hole (43) communicating with the fluid passage (41) is formed on the side wall of the main column (4), When the upper elastic mechanism is in the initial position, the small hole (43) is closed by the upper elastic mechanism, By pressing the main column (4), the small hole (43) is opened to fluidly connect the storage chamber (M) and the fluid passage (41). The pressure accumulator type spray pump (P3) according to claim 9 or 10, characterized by this.

12. The plurality of small holes (43) are formed on the side wall of the main column (4) at equal intervals along the circumferential direction. The pressure accumulator type spray pump (P3) according to claim 11, characterized by this.

13. On a surface of the second piston (7A, 7B, 7C) close to the upper elastic mechanism, a stopper portion (7B4) is formed, and the stopper portion (7B4) is configured to receive the upper elastic mechanism and position the upper elastic mechanism at the initial position. The accumulator type spray pump (P3) according to claim 9 or 10, characterized in that.

14. The upper elastic mechanism is Disposed between the main column (4) and the cylinder body (3), a first piston (5) facing the second piston (7A, 7B, 7C) across the storage chamber (M) along the axial direction, and A first elastic body (6) connecting the main column (4) and the first piston (5) along the axial direction. The accumulator type spray pump (P3) according to claim 9 or 10, characterized in that.

15. The upper elastic mechanism is Disposed between the main column (4) and the cylinder body (3), a first piston (5) facing the second piston (7A, 7B, 7C) across the storage chamber (M) along the axial direction, and A first elastic body (6) connecting the main column (4) and the first piston (5) along the axial direction. The accumulator type spray pump (P3) according to claim 11, characterized in that.

16. The upper elastic mechanism is Disposed between the main column (4) and the cylinder body (3), a first piston (5) facing the second piston (7A, 7B, 7C) across the storage chamber (M) along the axial direction, and A first elastic body (6) connecting the main column (4) and the first piston (5) along the axial direction. The accumulator type spray pump (P3) according to claim 13, characterized in that.

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