JP2023000859A - Jet pump and jet container - Google Patents

Abstract

To provide a pump which applies a pressure to a liquid to jet the liquid and has a structure which eliminates a possibility that a nozzle falls forward when the liquid is jetted.SOLUTION: A pump includes: a cylinder 10 including a space for storing a liquid therein; a piston 20 which compresses the space; and a jet button 30 attached to an upper end of the piston 20. The jet button 30 includes: a cylindrical nozzle 32 provided integrally with a cylindrical attachment part 31 which is attached to the upper end of the piston 20; and a columnar part 35 disposed within the nozzle. A center axis of the nozzle 32 intersects with a center axis of the piston 20. The nozzle 32 has an opening at a rear end part opposite to a jet port 36a. The columnar part 35 is inserted from the opening at the rear end part of the nozzle 32 and engaged with the nozzle 32.SELECTED DRAWING: Figure 2

Description

The present invention relates to a pump for ejecting liquid in a bottle.

A pump that is attached to the opening of the bottle and ejects a liquid such as a medicine in the bottle is designed in terms of the shape of the operation part (ejection button) and the direction of ejection according to the application. For example, a pump for spraying nasal drops into the nasal cavity is designed so that the nozzle outlet faces straight up. In use, the tip of the nozzle is inserted into the entrance of the nasal cavity to eject the drug into the nasal cavity. Also, the pump that sprays medicine from the mouth to the throat is designed with a nozzle that extends forward. In use, the nozzle is inserted into the mouth and sprays the drug into the throat.

Further, Patent Document 1 and the like disclose a pump having a pressure accumulation structure in order to forcefully inject a liquid such as medicine in a bottle. The pressure accumulation structure of the pump is a structure in which the sucked liquid is temporarily stored in the space of the cylinder, and when the user presses the ejection button, the piston in the cylinder is pushed down to compress the space. When the pressure in the space in the cylinder reaches a predetermined pressure or higher due to the user's pressing, the pressure pushes open the flow path in the piston, and the liquid in the cylinder rises in the flow path in the piston. The rising liquid is ejected from the ejection port of a nozzle attached to the tip of the channel.

In a pump with a pressure accumulation structure, the flow passage is narrowed to the vicinity of the spout to maintain the pressure in the flow passage, and the liquid is sprayed vigorously from the spout. It is also possible to squirt in a shape.

The nozzle of the ejection pump disclosed in Patent Document 1 is inserted from the front (in the ejection direction) into an annular groove provided at the tip of the flow path of the ejection button body. The nozzle is fixed to the ejection button body by fitting a projection provided on the outer peripheral surface of the nozzle into a circumferential groove provided in the annular groove of the ejection button body.

JP-A-2006-43539

As described above, the pump that vigorously ejects the liquid has a structure in which pressure is applied to the liquid inside, the liquid is guided to the ejection port through a narrow flow path, and the liquid is ejected into the space at once from the ejection port. Therefore, pressure is applied to the nozzle to push it outward at the time of jetting. Since the nozzle is fitted to the button body, it usually does not come off due to the pressure during ejection, but as the ejection amount increases, the force applied to the nozzle also increases. Further, in a pump for spraying a drug to the human body, a nozzle is inserted into the mouth, etc., so it is desirable to completely eliminate the possibility that the nozzle will fall off and fly forward together with the drug.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pump that vigorously ejects liquid under pressure and that eliminates the possibility of the nozzle dropping forward during ejection.

In order to achieve the above object, the present invention provides a pump that is attached to a container containing a liquid and applies pressure to the liquid in the container to eject the liquid. This pump
A cylinder having a space for storing liquid therein, a piston whose lower end is inserted into the cylinder and descends to compress the space, and a pressure in the space provided inside the piston exceeding a predetermined pressure. In this case, it has a flow path that guides the liquid in the space to the upper end, and an ejection button that is attached to the upper end of the piston and receives a user's operation to push the piston downward. The ejection button is composed of a cylindrical mounting portion fitted over the upper end of the piston, a cylindrical nozzle provided integrally with the mounting portion, and an integral part of the nozzle. A formed tip member and a top disposed within the nozzle are provided. The central axis of the nozzle intersects the central axis of the piston. The nozzle has an opening at the rear end on the side opposite to the jet port. The top has a columnar shape with an outer diameter corresponding to the inner diameter of the nozzle. The top is inserted through an opening at the rear end of the nozzle and engaged with the nozzle.

According to the present invention, the ejection button and the nozzle are integrated, and the space inside the nozzle is narrowed by inserting a piece from the rear end of the nozzle, eliminating the possibility of the nozzle dropping forward during ejection. can do.

(a) A front view and (b) a side view of the ejection pump 1 attached to the container 2 of the embodiment. Sectional drawing of the jet pump 1 of embodiment. 4(a) is a sectional view, (b) is a rear view, (c) is a top view, and (d) is a bottom view of the nozzle 32, the mounting portion 31, and the button main body of the ejection button 30 of the ejection pump 1 of the embodiment. FIG. (a-1) and (a-2) are a rear view and a cross-sectional view showing an example in which the groove 36b of the tip member 36 of the nozzle 32 of the jet pump 1 of the embodiment is formed in a screw shape; ) and (b-2) are a rear view and a sectional view showing an example in which grooves 36b of the tip member 36 of the nozzle 32 of the jet pump 1 of the embodiment are radially formed. (a) Cross-sectional view, (b) Side view of tip side, (c) Side view of rear end side of top 35 of ejection pump 1 of the embodiment. (a) A top view and (b) a cross-sectional view of the button lid portion 34 of the ejection pump 1 of the embodiment. (a) In the jet pump 1 of the embodiment, (a) a diagram showing the flow of the liquid when filling the space 12 in the cylinder 10 with the liquid, and (b) a diagram showing the flow of the liquid at the time of jetting.

A jet pump according to one embodiment of the present invention will be described below with reference to the drawings.

1(a) and 1(b) are a front view and a side view of a state in which the ejection pump of this embodiment is attached to a container. FIG. 2 is a cross-sectional view of the jet pump 1 of this embodiment. 3A to 3D are cross-sectional and external views of the ejection button 30 with the button cover 34 removed. 4(a-1), (a-2), (b-1) and (b-2) are diagrams showing examples of groove shapes of the tip member 36 of the nozzle 32 of the ejection pump 1, respectively. 5A to 5C are diagrams showing the appearance of the top 35. FIG. 6A and 6B are diagrams showing the appearance and cross section of the button lid portion 34. FIG. In addition, in FIGS. 2 to 6, cross-sectional portions of the members are colored in gray.

As shown in FIGS. 1(a) and 1(b), a jet pump 1 of this embodiment is attached to an opening at the top of a container (here, a bottle) 2 containing liquid, sucks up the liquid in the container, and pressurizes the liquid. It is a pump that spouts by adding

<Structure of injection pump>
The structure of the ejection pump 1 will be described with reference to FIG.

The jet pump 1 comprises a cylinder 10 , a piston 20 , a jet button 30 , a bottle mounting ring 40 and a tube 50 .

"Cylinder 10"
Cylinder 10 is internally provided with space 12 for storing liquid.

"Piston 20"
The piston 20 is composed of two members, a lower piston 21 and an upper piston 22, and the upper end of the lower piston 21 is inserted into the upper piston 22 from below.

Each lower end 21a, 22a is inserted into the cylinder 10. As shown in FIG. The outer peripheries of the lower ends 21a and 22a are in close contact with the inner wall of the cylinder 10, so that the space 12 between the lower ends 21a and 22a is kept airtight while sliding in the cylinder in the central axis direction (vertical direction). It is constructed so that it can be raised and lowered.

Below the center of the lower piston 21 in the axial direction, a flow path 21b is provided along the central axis.

The lower end of the channel 21b is an opening for taking in liquid. A communication passage 21c that connects the flow path 21b to the space 12 is provided in the vicinity of the upper end of the flow path 21b.

The outer periphery of the lower piston 21 is covered with a tubular elastic valve 21d so as to cover the communicating passage 21c. An upper peripheral edge of the valve 21 d is fixed to the outer peripheral surface of the lower piston 21 . The lower peripheral edge of the valve 21d is not fixed, and closes to block the communication passage 21c when the space 12 is pressurized, and opens to open the communication passage 21c when the space 12 becomes negative pressure. As a result, the liquid in the container 2 can be sucked up, stored in the space 12, and pressurized.

A compressed spring 13 is arranged in the space 11 between the lower end portion 21 a of the lower piston 21 and the bottom surface of the cylinder 10 . The spring 13 biases the lower piston 21 upward.

Inside the upper piston 22, a flow path 22b is provided along the axial direction from the lower end to the upper end. The upper portion of the lower piston 21 is inserted into the lower portion of the flow path 22b and operates as a valve that opens and closes the flow path 22b.

When the space 12 is not pressurized, the spring 13 applies a force to push up the lower piston 21, so the lower piston 21 closes the lower portion of the flow path 22b. When the pressure in the space 12 becomes greater than the pushing force of the spring 13, the lower piston 21 pushes down the spring 13 and moves down slightly to open the lower end of the flow path 22b. As a result, the liquid in the space 12 flows into the channel 22b through the gap between the lower piston 21 and the upper piston 22 and reaches the upper end 22c.

"Spout button 30"
A jet button 30 is attached to the upper end portion 22c of the upper piston 22. As shown in FIG. The ejection button 30 is operated by the user to push down the piston 20 .

The ejection button 30 includes a cylindrical mounting portion 31 , a nozzle 32 , a button body 33 and a button lid portion 34 .

As shown in FIGS. 3A to 3D, the cylindrical mounting portion 31, the nozzle 32, and the button body 33 are constructed integrally.

The cylindrical mounting portion 31 is a member that covers the upper end portion 22 c of the piston 20 and mounts the ejection button 30 on the piston 20 .

The nozzle 32 is a cylindrical member, and the central axis 32a intersects (here, orthogonally) the central axis of the piston 20 .

The tip of the nozzle 32 is provided with a tip member 36 that narrows the tip of the nozzle to form a spout 36a. The tip member 36 is configured integrally with the nozzle 32 .

Further, the internal space of the nozzle 32 communicates with the internal space of the mounting portion 31 through a communication passage 32b. A top 35 is arranged in the internal space of the nozzle 32 . The piece 35 has a columnar shape whose outer diameter corresponds to the inner diameter of the nozzle 32 , narrows the inner space of the nozzle 32 , and forms a flow path 32 c along the inner wall of the nozzle 32 . Thereby, a narrow flow path 32c capable of maintaining the flow velocity of the liquid can be formed in the nozzle 32. FIG.

It should be noted that a plurality of grooves 36b are formed on the surface of the tip member 36 on the inner space side of the nozzle 32 as shown in FIG. The groove 36b may have a screw shape as shown in FIGS. 4(a-1) and (a-2), or a radial shape as shown in FIGS. 4(b-1) and (b-2). There may be. Further, on the inner wall of the nozzle 32, a protrusion 36c having a longitudinal direction in the axial direction of the nozzle 32 is provided in the vicinity of the tip member 36 and between the grooves 36b. The convex portion 36c guides the liquid guided to the tip member 36 by the flow path 32c along the inner wall of the nozzle 32 to the screw-shaped or radial groove 36b, and the screw-shaped or radial groove 36b maintains the flow rate. can be guided to the ejection port 36a.

4(a-1) and (a-2), the width of the screw-shaped groove 36b is narrowed as it approaches the ejection port 36a, and the central axis of the groove 36b is It is slanted and formed into a twisted shape. As a result, the screw-shaped grooves 36b in FIGS. 4(a-1) and (a-2) can be replaced with the radial grooves in FIGS. 4(b-1) and (b-2) if other conditions are the same. The flow velocity of the liquid reaching the spout 36a is higher than that at the spout 36b.

4(a-1) and (a-2) is smaller than that of the tip member 36 in FIGS. 4(b-1) and (b-2).

As a result, the tip member 36 of the screw-shaped groove 36b in FIGS. 4(a-1) and 4(a-2) maintains the flow velocity of the liquid, and can be ejected from the small ejection port 36a to the external space at once. Therefore, it is suitable for ejecting liquid in the form of a mist. On the other hand, the tip member 36 of the radial groove 36b in FIGS. 4(b-1) and (b-2) slightly suppresses the flow velocity of the liquid compared to FIGS. 4(a-1) and (a-2). , is suitable for forming a vigorous straight jet flow and jetting outward from a slightly large jet port 36a.

On the other hand, an opening 32d is provided at the rear end portion of the nozzle 32 on the side opposite to the ejection port 36a. The piece 35 is inserted through an opening 32 d at the rear end of the nozzle 32 and engaged with the nozzle 32 . Specifically, as shown in FIGS. 5(a) to 5(c), an annular protrusion 35a is provided along the outer circumference of the columnar top 35 on its outer peripheral surface. The inner wall of the nozzle 32 is provided with an annular groove 32e at a position corresponding to the annular projection 35a of the piece 35, and is engaged with the annular projection 35a of the piece 35. As shown in FIG. This prevents the top 35 from dropping out of the opening 32 d at the rear end of the nozzle 32 .

The button body 33 of the ejection button 30 is a cylindrical member provided outside the cylindrical mounting portion 31, as shown in FIGS. 3(c) and 3(d).

A button lid portion 34 of the ejection button 30 covers the rear end portion of the nozzle 32 from above and is fitted to the upper edge portion of the button body 33 . Specifically, as shown in FIGS. 6A and 6B, the button lid portion 34 includes a disc member 34a and a skirt member 34b extending downward from a portion of the peripheral edge of the disc member 34a. I have. The disc member 34a and the skirt member 34b are constructed integrally.

A plurality of grooves are provided on the upper surface of the disk member 34a to prevent the user's fingers from slipping.

As shown in FIG. 2, the skirt member 34b covers the opening 32d at the rear end of the nozzle 32, and even if the annular projection 35a of the top 35 is disengaged from the annular groove 32e of the nozzle 32 due to the pressure when the liquid is ejected, the opening 32d remains open. 32d is held so that it does not drop backward.

Moreover, as shown in FIG. 2, the lower end 34c of the skirt member 34b of the button lid portion 34 is inserted inside the cylindrical button body 33 and engaged with the button body 33. As shown in FIG. As a result, even when the piece 35 pushes the skirt member 34b rearward due to the pressure of the ejected liquid, the bottom end 34c of the skirt member 34b is held down by the button body 33, thereby suppressing deformation of the skirt member 34b. Therefore, it is possible to strongly prevent the top 35 from falling off backward.

<Operation of each part of the ejection pump 1>
The operation of each part when the liquid in the container 2 is ejected by the ejection pump 1 will be described with reference to FIGS. 7(a) and 7(b).

The bottle mounting ring 40 is fixed by screwing or fitting around the opening of the container 2 . A tube 50 is attached to the lower end of the cylinder 10 as required.

The user puts his/her finger on the upper surface of the ejection button 30 and presses it down. As a result, the piston 20 to which the mounting portion 31 of the ejection button 30 is mounted descends inside the cylinder 10 while compressing the spring 13 . Along with this, the space 12 inside the cylinder 10 is compressed. Since the space 12 of the jet pump 1 that is not in use contains air, the air compressed by the compression of the space 12 passes between the upper piston 22 and the cylinder 10, and flows through the communication hole of the cylinder 10. It is discharged outside from 10a.

When the user releases the ejection button 30, the piston 20 is pushed up by the spring 13 and the space 12 inside the cylinder is expanded.

As a result, the pressure in the space 12 becomes negative, the valve 21d opens, and the liquid in the container 2 is sucked up by the pipe 50 as indicated by the arrow in FIG. It passes through and enters the flow path 21b of the lower piston 21 of the piston 20, and moves into the space 12 from the communicating path 21c. The space 12 is thus filled with liquid.

When the user presses the ejection button 30 again in this state, the piston 20 descends inside the cylinder 10 while compressing the spring 13 . Along with this, the space 12 inside the cylinder 10 is compressed again, and pressure is applied to the liquid inside the space 12 . When the pressure in space 12 becomes greater than the force with which spring 13 pushes lower piston 21 upward, the pressure in space 12 pushes lower piston 21 downward against spring 13 .

As a result, as shown in FIG. 7(b), a gap is created between the lower piston 21 and the upper piston 22, opening the flow path 22b. The liquid in the space 12 to which the pressure is applied flows into the channel 22b in the upper piston 22 at once through this gap and reaches the upper end of the upper piston 22. As shown in FIG. Then, the liquid flows from the communicating passage 32b of the nozzle 32 into the channel 32c between the inner wall of the nozzle 32 and the top 35, and advances through the channel 32c while maintaining the flow velocity. The screw-shaped groove 36b of the tip member 36 guides the liquid to the spout 36a while maintaining the flow rate of the liquid.

The liquid guided to the ejection port 36a while maintaining the flow velocity is ejected at once from the ejection port 36a to the external space. As a result, when the shape of the groove 36b of the tip member 36 is screw-shaped as shown in FIGS. . On the other hand, when the shape of the groove 36b of the tip member 36 is radial as shown in FIGS. .

As described above, in this embodiment, the nozzle 32 is integrally formed with other members such as the mounting portion 31 of the ejection button 30, and is attached to the piston 20. No fear of falling off.

Further, in order to form a flow path leading the liquid to the ejection port 36a without reducing the flow velocity in the nozzle 32, the top 35 is used and inserted from the opening 32d at the rear end of the nozzle 32. There is no fear that the will drop forward.

The piece 35 is engaged with the inner wall of the nozzle 32 and has a structure that does not easily come off rearward. As a result, it is possible to prevent the top 35 from dropping backward.

In the above-described embodiments, the drawings show the shape of the long nozzle 32 in which the tip of the nozzle 32 protrudes forward from the button body 33 of the ejection button 30, but this embodiment is limited to the long nozzle. is not. Of course, it is possible to make the structure of this embodiment with a normal ejection button.

Whether the jet state is mist jet or straight jet is determined not only by the shape of the groove 36b of the tip member 36 shown in FIG. It depends on the pressure during compression in the space 12 inside the cylinder 10 determined by the spring constant and the like. Therefore, the shape of the groove 36b and the pressure in the space inside the cylinder 10 should be designed so as to obtain a desired injection state.

DESCRIPTION OF SYMBOLS 1... Ejection pump 2... Container 10... Cylinder 10a... Communication hole 11... Space 12... Space 13... Spring 20... Piston 21... Lower piston 21a... Lower end part 21b... Flow path 21c Communicating path 21d Valve 22 Upper piston 22a Lower end 22b Flow path 22c Upper end 30 Ejection button 31 Mounting part 32 Nozzle 32a Center shaft 32b Connection Passage 32c Flow path 32d Opening 32e Annular groove 33 Button main body 34 Button cover 34a Disc member 34b Skirt member 34c Lower end 35 Top 35a Annular projection , 36... Tip member 36a... Ejection port 36b... Groove 36c... Convex part 40... Bottle attachment ring 50... Pipe

Claims (6)

A pump that is attached to a container that holds a liquid, sucks up the liquid in the container, applies pressure, and ejects the liquid,
a cylinder internally provided with a space for storing the liquid;
a piston whose lower end is inserted into the cylinder and descends to compress the space;
a channel provided inside the piston for guiding the liquid in the space to an upper end when the pressure in the space exceeds a predetermined pressure;
an ejection button mounted on the upper end of the piston and receiving an operation by a user to push down the piston;
The ejection button includes a cylindrical mounting portion mounted over the upper end of the piston, a cylindrical nozzle provided integrally with the mounting portion, and an integral part with the nozzle. Equipped with a tip member narrowed to form a spout, and a piece arranged in the nozzle,
the central axis of the nozzle intersects the central axis of the piston;
The nozzle has an opening at the rear end on the side opposite to the tip member,
the top has a columnar shape with an outer diameter corresponding to the inner diameter of the nozzle;
The ejection pump, wherein the piece is inserted through an opening at the rear end of the nozzle and engaged with the nozzle. 2. The ejection pump according to claim 1, wherein the ejection button further comprises a tubular button body provided outside the tubular mounting portion, and a button lid portion fitted to the button body. ,
The button lid portion includes a disc member covering the tubular button main body and the upper side of the nozzle, and a skirt member covering the rear end portion of the top at the rear end portion of the nozzle. A jet pump, wherein the skirt member is integrally constructed. 3. The jet pump according to claim 2, wherein the bottom end of the skirt member of the button lid portion is inserted into the tubular button body. 2. The jet pump according to claim 1, wherein an annular projection is provided on the outer periphery of said columnar piece, and an annular groove is provided on the inner wall of said nozzle at a position corresponding to said annular projection of said piece. , a jetting pump in engagement with said annular projection. 2. The jet pump according to claim 1, wherein the tip member of the nozzle is provided with a plurality of screw-shaped or radial grooves around the jet port. a container and a squirt pump attached to an upper opening of the container;
A jetting container, wherein the jetting pump is the jetting pump according to any one of claims 1 to 5.

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