JP7625340B2 - Pump type dispensing device - Google Patents

Description

This disclosure relates to a pump-type dispensing device that is attached to the mouth of a container.

Some containers, which contain cleaning agents, cosmetics, etc., are fitted with a pump-type dispenser at the opening to make it easy to remove the contents.

As an example of a pump-type dispensing device used with such a container, as described in Patent Document 1, there is known a device that has an attachment part that is attached to the mouth of the container, a pump that is fixed to the container by the attachment part, and a nozzle head made of synthetic resin that is connected to the stem of the pump and has a nozzle that extends in a substantially horizontal direction, and when the nozzle head is pressed down, the pump is operated to dispense the contents contained in the container through a dispensing flow path in the nozzle.

JP 2016-83616 A

In the above-mentioned conventional pump-type dispensing device, the outer peripheral surface of the upper end of the stem standing upward from the pump is fitted into the inner peripheral surface of the tubular portion hanging down from the top wall of the nozzle head. In this case, for example, if a polyolefin resin such as polypropylene (PP) is used as the material for the nozzle head and a polyester resin such as polybutylene terephthalate (PBT) is used as the material for the stem, the nozzle head may swell depending on the type of contents stored in the container, and the contents may leak out from the gap between the nozzle head and the stem caused by the swelling, so there is room for improvement.

The objective of this disclosure is to provide a pump-type dispenser that can prevent the contents from leaking unintentionally by the user.

The pump-type dispensing device of the present disclosure comprises:
An attachment part that is attached to the mouth of a container that contains the contents;
a pump fixed to the container by the mounting portion;
a nozzle head having a nozzle for ejecting the contents pumped by the pump to the outside,
The pump has a cylindrical stem that operates the pump when pressed and guides the pumped contents to the nozzle head,
the nozzle head has a cylindrical connecting portion fixed to an upper end portion of the stem,
one of the upper end portion of the stem and the connecting portion sandwiches the other from both sides in the radial direction, and thus the stem and the nozzle head are fixed by fitting together,
The contents flow radially inward from a portion where one of the upper end portion of the stem and the connecting portion sandwiches the other from both radial sides ,
The nozzle head is characterized in that a stem outer tube erected on the upper end of the stem and a stem inner tube erected on the upper end of the stem radially inside the stem outer tube sandwich the connecting portion of the nozzle head from both radial sides .

In the above configuration of the pump-type dispensing device of the present disclosure, it is preferable that the nozzle outer cylinder that hangs down from the nozzle in the nozzle head and the nozzle inner cylinder that hangs down from the nozzle on the radial inside of the nozzle outer cylinder sandwich the upper end of the stem from both radial sides.

In the pump-type dispensing device of the present disclosure, in the above configuration, it is preferable that a check valve body is seated at the base end of the stem inner tube, which allows the contents pumped from the pump to pass through and prevents the contents from flowing back from the nozzle.

In the pump-type dispensing device disclosed herein, in the above configuration, it is preferable that the material of the stem is polybutylene terephthalate and the material of the connecting portion is polypropylene.

This disclosure provides a pump-type dispensing device that can prevent the contents from leaking unintentionally by the user.

1 is a side cross-sectional view of a pump-type spouting device according to a first embodiment of the present disclosure, in a state (initial state) in which the pump-type spouting device is attached to a container. FIG. 2 is a side cross-sectional view showing a state in which the nozzle head is pressed from the state shown in FIG. 1 to cause the contents to be ejected. FIG. 4 is an enlarged side cross-sectional view of a pump-type spout according to a second embodiment of the present disclosure. FIG. 11 is an enlarged side cross-sectional view of a pump-type spout device according to a third embodiment of the present disclosure. FIG. 11 is an enlarged side cross-sectional view of a pump-type spout device according to a fourth embodiment of the present disclosure.

The first embodiment of the pump-type dispensing device disclosed herein will be illustrated and described below with reference to the drawings.

In this specification and claims, the vertical direction means the vertical direction when the pump-type dispensing device 100 is attached to the container 2 and in an upright position as shown in FIG. 1. The side where the nozzle 31 is provided (left side in FIG. 1) is the front, and the opposite side (right side in FIG. 1) is the rear. The direction perpendicular to the vertical direction and the front-rear direction (direction perpendicular to the paper surface in FIG. 1) is the lateral direction. The radially outward direction means the direction away from the central axis O along a straight line passing through the central axis O and perpendicular to the central axis O, and the radially inward direction means the direction toward the central axis O along a straight line passing through the central axis O and perpendicular to the central axis O. The circumferential position means the angular position around the central axis O. In this specification and claims, "sandwiched from both sides in the radial direction" means sandwiched from both sides in the radial direction by the same member, and does not include the case where the radially inward and radially outward are sandwiched by different members.

The pump-type dispensing device 100 of the first embodiment of the present disclosure shown in FIG. 1 is used as a pump-type dispensing container by being attached to the mouth portion 2a of the container 2, and dispenses the contents contained in the storage space S of the container 2. As shown in FIG. 1, the pump-type dispensing device 100 has an attachment portion 10, a pump 20, and a nozzle head 30.

The mounting part 10 is made of synthetic resin material and is cylindrical with an inward flange 10c integrally formed at the upper end of the outer wall 10a. The female thread 10b on the inner surface of the outer wall 10a is screwed into the male thread 2b on the outer surface of the mouth 2a, allowing it to be detachably mounted on the mouth 2a of the container 2.

The outer wall 10a of the mounting portion 10 has a cylindrical shape as shown in FIG. 1. In addition, a cylindrical inner wall 10d is erected upward from the inner end of the flange 10c.

The pump 20 has a cylinder 21 having a cylindrical outer shape, a suction tube 22 attached to a fitting cylindrical portion 21d at the bottom of the cylinder 21, a cylindrical stem 23 that defines an inner flow path IN that guides the pressurized contents to the nozzle head 30, a piston 24 that is arranged inside the cylinder 21 and can move up and down freely, and when the stem 23 is pressed down, it moves downward to discharge the contents inside the cylinder 21 from the upper end of the stem 23, a piston guide 25 that guides the piston 24 in a state in which it can abut from below, a spring 26 that urges the piston guide 25 and the stem 23 upward, a check valve 27 that opens and closes between the suction tube 22 and the inside of the cylinder 21, and a holding member 29 that holds the stem 23 in a state in which it can slide from the outside in the radial direction. In this embodiment, the stem 23 is arranged coaxially with the cylinder 21. As shown in FIG. 1, the piston guide 25 is urged upward against the lower part of the cylinder 21 by the spring 26.

A ring-shaped flange 21a that protrudes radially outward is integrally formed on the top of the cylinder 21. The flange 21a of the pump 20 is sandwiched between a packing 28 disposed at the upper end of the mouth 2a of the container 2 and a flange 10c of the mounting part 10 that is screwed to the mouth 2a, so that the pump 20 is fixed to the mouth 2a of the container 2 and supported in a suspended state inside the container 2 through the mouth 2a.

Inside the cylinder 21, a piston guide 25 made of, for example, resin, is housed so that it can move up and down freely. The piston guide 25 is fixed to the stem 23 by fitting a fitting tube 25b erected upward from the inner peripheral end into the inner peripheral surface of the stem 23. A piston 24 is disposed above the piston guide 25. The inner peripheral surface of the lower end of the fitting tube 25b is in slidable contact with the outer peripheral surface of a seal pillar 27a erected upward from the check valve 27. The inner space of the fitting tube 25b and the stem 23 defines an inner flow path IN that guides the contents pumped by the pump 20 to the nozzle head 30, and the lower end of the inner flow path IN is blocked by the seal pillar 27a.

The piston 24 is slidable against the inner surface of the cylinder 21 and is guided by the piston guide 25. When the piston guide 25 descends, it connects the pressurized chamber P below the piston guide 25 to the inner flow path IN, and when the piston guide 25 ascends, it operates to block the communication between the pressurized chamber P and the inner flow path IN. More specifically, as shown in FIG. 1, the piston 24 is formed into a seal body with an H-shaped cross section by an elastic body, and its outer periphery is in sliding contact with the inner surface of the cylinder 21, and its inner periphery is movable vertically along the outer periphery of the fitting tube 25b. When the piston guide 25 descends, the piston guide 25 moves downward relative to the piston 24 and separates, so that the pressurized chamber P communicates with the inner flow path IN via the inlet hole 25a provided at approximately the center height of the fitting tube 25b. On the other hand, when the piston guide 25 ascends, it abuts against the piston 24, so that the flow path from the pressurized chamber P to the inlet hole 25a is blocked. This also blocks communication between the inner flow passage IN and the pressurized chamber P.

At the upper end of the stem 23, a stem outer tube 23a that forms the outer peripheral surface and a stem inner tube 23b that is arranged radially inside the stem outer tube 23a are erected. In this embodiment, the stem outer tube 23a is formed longer in the vertical direction than the stem inner tube 23b, and the upper part of the stem outer tube 23a is sandwiched between a nozzle outer tube 33a that hangs down from the base end of the nozzle 31 in the nozzle head 30 described later and a recess 33c that is formed between the nozzle outer tube 33a that hangs down from the nozzle 31 on the radial inside of the nozzle outer tube 33a. That is, the nozzle outer tube 33a, the nozzle inner tube 33b, and the recess 33c form a connecting part 33 that fits and fixes the upper end of the stem 23. As a result, the upper end of the stem 23 and the connecting part 33 of the nozzle head 30 are fixed in a liquid-tight sealed state.

In this embodiment, the stem 23 is made of a polyester resin, polybutylene terephthalate (PBT), and the nozzle head 30 is made of a polyolefin resin, polypropylene (PP). Since polyolefin resin is an oleophilic (oil-absorbing) resin, if the container 2 contains, for example, a cleaning agent or cosmetic containing hydrocarbon oil, the polyolefin resin may swell when it comes into contact with the contents. In this embodiment, as described above, the upper end of the stem 23 is configured to be sandwiched from both sides in the radial direction by the connecting portion 33 of the nozzle head 30. With this configuration, even if the nozzle outer tube 33a expands radially outwardly due to swelling in a direction away from the stem outer tube 23a, the nozzle inner tube 33b also expands radially outwardly due to swelling and approaches the stem outer tube 23a, so that the seal between the connecting portion 33 of the nozzle head 30 and the upper end of the stem 23 can be maintained.

The materials used for the nozzle head 30 and the stem 23 are not limited to the above-mentioned aspects, and other materials may be used. For example, the material for the stem 23 may be a polyester-based resin other than polybutylene terephthalate (PBT), and the material for the nozzle head 30 may be a polyolefin-based resin other than polypropylene (PP). The material for the stem 23 may be a polyolefin-based resin, and the material for the nozzle head 30 may be a polyester-based resin. The material for the stem 23 and the material for the nozzle head 30 may be the same type of material. The present disclosure has a particularly remarkable effect when the material for the stem 23 and the material for the nozzle head 30 are different types of materials.

As shown in FIG. 1, the lower part of the stem 23 is provided with an expanded diameter portion 23d that is expanded radially outward. When the nozzle head 30 is pressed down to push the stem 23 down, the expanded diameter portion 23d of the stem 23 pushes down the piston 24, pressurizing the contents in the pressurizing chamber P and pumping them upward through the inner flow passage IN.

In this embodiment, the stem 23 and the piston guide 25 are formed separately and then assembled. However, this is not limited to the embodiment, and the stem 23 and the piston guide 25 may be formed integrally.

The nozzle head 30 includes a peripheral wall 34, a top wall 36 that closes the upper end of the peripheral wall 34, a nozzle outer cylinder 33a and a nozzle inner cylinder 33b as a connecting portion 33 that hangs down from the top wall 36 on the radially inner side of the peripheral wall 34, and a nozzle 31 that protrudes forward from the peripheral wall 34. The space on the radially inner side of the connecting portion 33 and the internal space of the nozzle 31 form a nozzle flow path NZ that guides the contents pumped from the container 2 by the pump 20 to the nozzle hole 31a.

The pump 20 is operated by pushing the stem 23 downward against the biasing force of the spring 26. That is, when a user pushes the top wall 36 of the nozzle head 30 downward with the palm of the hand or the like (see FIG. 2), the stem 23 fixed to the nozzle head 30 and the piston guide 25 fixed to the stem 23 via a fitting tube 25b are also pushed downward. In addition, the enlarged diameter portion 23d of the stem 23 abuts against the piston 24, so that the piston 24 also starts to move downward after the piston guide 25. As the piston guide 25 starts to descend, the piston guide 25 moves downward relative to the piston 24, creating a gap between them, and the inner flow path IN of the stem 23 communicates with the pressurized chamber P via the inlet hole 25a.

The downward movement of the piston 24 pressurizes the contents in the pressurizing chamber P, and when the inner flow path IN of the stem 23 communicates with the pressurizing chamber P, the contents in the pressurizing chamber P flow into the inner flow path IN from the inlet hole 25a, and are further compressed upward in the inner flow path IN, and are ejected to the outside from the nozzle hole 31a via the nozzle flow path NZ of the nozzle head 30. In this embodiment, the seal pillar 27a moves upward in the fitting tube 25b, further compressing the inner flow path IN, so that the contents can be effectively pressed toward the nozzle head 30. As described above, since the upper end of the stem 23 is sandwiched from both sides in the radial direction by the nozzle outer tube 33a and the nozzle inner tube 33b, even if the nozzle head 30 absorbs the contents and swells, the seal between the connecting part 33 of the nozzle head 30 and the upper end of the stem 23 is maintained in a good state. Therefore, when the contents are ejected, the contents in the nozzle flow path NZ are prevented from leaking out from the gap between the nozzle head 30 and the stem 23.

On the other hand, when the top wall 36 is released from being pressed down, the piston guide 25 is pushed upward together with the stem 23 and nozzle head 30 by the biasing force of the spring 26 and returns to its original position. The piston guide 25 starts to move upward and abuts against the piston 24 again, blocking communication between the inner flow passage IN and the pressurized chamber P. In addition, when the piston 24 moves upward together with the piston guide 25, the inside of the pressurized chamber P of the cylinder 21 becomes negative pressure, and the check valve 27 is separated from the valve seat 21c and opened, so that the contents contained in the container 2 are sucked into the inside of the pressurized chamber P through the suction tube 22.

The side wall of the cylinder 21 is provided with a communication port 21b below the flange 21a, and when the inside of the container 2 is in a negative pressure state, outside air is taken in through the communication port 21b, causing the container 2 to return to its original shape. Note that if the container 2 is, for example, a pouch-shaped soft packaging body or a so-called delaminated container with a double structure, it is not necessary to restore the shape of the container 2, and therefore communication port 21b does not need to be provided. In other words, the necessity for communication port 21b depends on the shape of the container 2.

As described above, the pump-type dispensing device 100 of this embodiment comprises an attachment part 10 that is attached to the mouth 2a of a container 2 that contains the contents, a pump 20 that is fixed to the container 2 by the attachment part 10, and a nozzle head 30 having a nozzle 31 that sprays the contents pressurized by the pump 20 to the outside, the pump 20 has a cylindrical stem 23 that operates the pump 20 when pressed and directs the pressurized contents to the nozzle head 30, and the nozzle head 30 has a cylindrical connecting part 33 fixed to the upper end of the stem 23, and one of the upper end of the stem 23 and the connecting part 33 clamps the other from both radial sides, thereby fixing the stem 23 and the nozzle head 30 by fitting them together. By adopting such a configuration, even if the connecting portion 33 of the nozzle head 30 absorbs the contents and expands radially outward due to swelling, for example, the upper end of the stem 23 is sandwiched from both radial sides by the connecting portion 33 of the nozzle head 30, so that a seal can be maintained between the connecting portion 33 of the nozzle head 30 and the upper end of the stem 23. Therefore, it is possible to prevent the contents in the nozzle flow channel NZ from leaking out to the outside through the gap between the nozzle head 30 and the stem 23.

In addition, in this embodiment, the nozzle outer cylinder 33a that hangs down from the nozzle 31 in the nozzle head 30 and the nozzle inner cylinder 33b that hangs down from the nozzle 31 on the radial inside of the nozzle outer cylinder 33a are configured to sandwich the upper end of the stem 23 from both radial sides. By adopting such a configuration, even if the nozzle outer cylinder 33a absorbs the contents and expands in diameter radially outward in a direction away from the stem outer cylinder 23a due to swelling, the nozzle inner cylinder 33b also expands in diameter radially outward due to swelling and comes into closer contact with the stem outer cylinder 23a, so that the seal between the connecting part 33 of the nozzle head 30 and the upper end of the stem 23 can be maintained. Therefore, it is possible to prevent the contents in the nozzle flow path NZ from leaking out from the gap between the nozzle head 30 and the stem 23.

In addition, in this embodiment, the stem 23 is made of polybutylene terephthalate, and the connecting portion 33 is made of polypropylene. By adopting such a configuration, the manufacturing cost of the pump-type dispensing device 100 can be reduced by using an inexpensive material that swells easily for the nozzle head 30, which does not require high dimensional accuracy.

Next, a second embodiment of the pump-type dispensing device of the present disclosure will be illustrated and described with reference to the drawings.

The pump-type dispensing device 200 of this embodiment is similar to the first embodiment except for the difference in the configuration of the fitting portion between the nozzle head 30 and the stem 23. Therefore, here, the differences from the first embodiment will be mainly described. Also, parts having the same functions as the first embodiment will be described with the same reference numerals.

As shown in FIG. 3, the upper end of the stem 23 is provided with a stem outer tube 23a that forms the outer peripheral surface, and a stem inner tube 23b that is disposed radially inside the stem outer tube 23a. In this embodiment, the stem outer tube 23a is formed longer in the vertical direction than the stem inner tube 23b. The upper part of the stem outer tube 23a is sandwiched between the nozzle outer tube 33a that hangs down from the base end of the nozzle 31 in the nozzle head 30 and the nozzle inner tube 33b that hangs down from the nozzle 31 on the radial inside of the nozzle outer tube 33a. That is, the nozzle outer tube 33a, the nozzle inner tube 33b, and the recess 33c form a connecting portion 33 that fits and fixes the upper end of the stem 23. As a result, the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30 are sealed liquid-tight.

In addition, in this embodiment, the lower part of the nozzle inner tube 33b hanging down from the nozzle 31 is sandwiched in a recess 23c formed by the stem outer tube 23a and the stem inner tube 23b erected on the upper end of the stem 23. With this configuration, compared to the first embodiment, it is more difficult for the contents to enter radially outward from the lower end of the nozzle inner tube 33b, so that leakage of the contents from the gap between the connecting part 33 of the nozzle head 30 and the upper end of the stem 23 can be more effectively suppressed.

As described above, in this embodiment, the stem outer tube 23a erected at the upper end of the stem 23 and the stem inner tube 23b erected at the upper end of the stem 23 radially inside the stem outer tube 23a are configured to sandwich the connecting portion 33 (nozzle inner tube 33b) of the nozzle head 30 from both radial sides. By adopting such a configuration, it becomes difficult for the contents to enter from the lower end of the nozzle inner tube 33b to the radially outward side, so that leakage of the contents from the gap between the connecting portion 33 of the nozzle head 30 and the upper end of the stem 23 can be more effectively suppressed.

Next, a third embodiment of the pump-type dispensing device of the present disclosure will be illustrated and described with reference to the drawings.

The pump-type dispensing device 300 of this embodiment is similar to the first embodiment except for the difference in the configuration of the fitting portion between the nozzle head 30 and the stem 23. Therefore, here, the differences from the first embodiment will be mainly described. Also, parts having the same functions as the first embodiment will be described with the same reference numerals.

As shown in FIG. 4, the upper end of the stem 23 is provided with a stem outer tube 23a that forms the outer peripheral surface, and a stem inner tube 23b that is disposed radially inside the stem outer tube 23a. In this embodiment, the stem outer tube 23a is formed to be longer in the vertical direction than the stem inner tube 23b. A nozzle tube 33d that serves as a connecting portion 33 that hangs down from the base end of the nozzle 31 in the nozzle head 30 is fitted into the recess 23c formed by the stem outer tube 23a and the stem inner tube 23b. In other words, the nozzle tube 33d of the nozzle head 30 is sandwiched from both radial sides by the stem outer tube 23a and the stem inner tube 23b that stand upright from the upper end of the stem 23.

The above configuration provides a liquid-tight seal between the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30. That is, when the nozzle tube 33d expands radially outward due to swelling, the adhesion to the stem outer tube 23a arranged radially outward of the nozzle tube 33d is strengthened. In addition, since the stem inner tube 23b is erected radially inward of the nozzle tube 33d, it is possible to effectively prevent the contents from entering the lower end of the nozzle tube 33d. Therefore, it is possible to improve the sealing between the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30.

In particular, in this embodiment, as shown in FIG. 4, a valve seat 23e that functions as part of a check valve is formed at the base end of the stem inner tube 23b, and a spherical valve body 40 is configured to seat on the valve seat 23e. When the user presses the nozzle head 30 to operate the pump 20, the valve body 40 is displaced upward away from the valve seat 23e as the pressure in the inner flow path IN increases due to the pressure being pumped out of the contents. This opens the check valve formed by the valve body 40, and the contents in the container 2 are sprayed to the outside through the inner flow path IN and the nozzle flow path NZ. Furthermore, when pressure on the nozzle head 30 is released, negative pressure is created in the inner flow path IN, and the valve body 40 seats on the valve seat 23e again, so that the check valve formed by the valve body 40 is closed.

In this way, when the pump 20 is not operating, the valve body 40 is seated on the valve seat 23e provided at the base end of the stem inner tube 23b, so the stem inner tube 23b is configured to be less likely to displace radially inward. From this point of view, the force that the stem outer tube 23a and the stem inner tube 23b use to pinch the connecting portion 33 (nozzle tube 33d) of the nozzle head 30 from both sides in the radial direction is not weakened, so the seal between the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30 can be improved.

As described above, in this embodiment, the base end of the stem inner tube 23b is configured to seat the valve body 40 of the check valve, which allows the contents pumped from the pump 20 to pass through and prevents the contents from flowing back from the nozzle 31. By adopting such a configuration, the seating of the valve body 40 makes it difficult for the stem inner tube 23b to be displaced radially inward, so the configuration in which the nozzle tube 33d is sandwiched between the stem outer tube 23a and the stem inner tube 23b is maintained. Therefore, the sealing performance between the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30 can be improved.

Next, a fourth embodiment of the pump-type dispensing device of the present disclosure will be illustrated and described with reference to the drawings.

The pump-type dispensing device 400 of this embodiment is similar to the first embodiment except for the difference in the configuration of the fitting portion between the nozzle head 30 and the stem 23. Therefore, here, the differences from the first embodiment will be mainly described. Also, parts having the same functions as the first embodiment will be described with the same reference numerals.

As shown in FIG. 5, a stem tube 23f is erected at the upper end of the stem 23. A fitting member 50 made of polybutylene terephthalate (PBT), the same polyester resin as the stem 23, is attached to the radial outside of the stem tube 23f. The fitting member 50 includes a stem outer tube 52, a stem inner tube 51 provided on the radial inside of the stem outer tube 52, a bottom wall 54 that horizontally connects the lower ends of the stem outer tube 52 and the stem inner tube 51, and an upper wall 53 that extends radially inward from the upper end of the stem inner tube 51 and abuts against the upper end of the stem tube 23f. The fitting member 50 functions as a part of the stem 23 by being attached to the stem tube 23f, and the stem outer tube 52 and the stem inner tube 51 of the fitting member 50 sandwich the nozzle tube 33d, which is the connection part 33 of the nozzle head 30, from both radial sides.

The above configuration provides a liquid-tight seal between the fitting member 50 attached to the upper end of the stem 23 and the nozzle tube 33d serving as the connecting portion 33 of the nozzle head 30. That is, when the nozzle tube 33d expands radially outward due to swelling, the adhesion force to the stem outer tube 52 arranged radially outward of the nozzle tube 33d is strengthened. In addition, since the stem inner tube 51 is erected radially inside the nozzle tube 33d, it is possible to effectively prevent the contents from entering the lower end of the nozzle tube 33d. Therefore, it is possible to improve the sealing between the fitting member 50 attached to the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30.

As shown in the above example, the stem outer tube and the stem inner tube are not limited to being integrally formed at the upper end of the stem 23 (as in the case of the stem outer tube 23a and the stem inner tube 23b), but also include being provided on a member made of the same or similar material as the stem 23 (as in the case of the stem outer tube 52 and the stem inner tube 51). In this case, the same material means, for example, a material whose main component is the same polyester resin.

The nozzle outer tube and the nozzle inner tube are not limited to being integrally formed with the nozzle head 30, but may also be provided on a member made of the same or similar material as the nozzle head 30. In this case, the same material means, for example, a material whose main component is the same polyolefin resin.

Although the present disclosure has been described based on various drawings and examples, it should be noted that a person skilled in the art would be able to easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these modifications and corrections are included in the scope of the present invention. For example, the functions contained in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined into one or divided. It should be understood that these are also included in the scope of the present invention.

For example, this disclosure envisages a case in which the contents contain a cleaning agent or cosmetic that contains a hydrocarbon oil that is believed to cause swelling of the nozzle head 30, but is not limited to this aspect, and is also effective when containing other contents that cause swelling of polyolefin-based resins.

In addition, in this disclosure, for example, "fixed to the stem" is not limited to being directly attached to the stem 23, but also includes being fixed to the stem 23 via another member. The same applies to members other than the stem 23.

In addition, the pump 20 is not limited to the above configuration, and other configurations can be used as long as they are activated by pushing down the stem 23.

2 container 2a mouth portion 2b male thread 10 mounting portion 10a outer peripheral wall 10b female thread 10c flange 10d inner peripheral wall 20 pump 21 cylinder 21a flange 21b communication port 21c valve seat 21d fitting tube portion 22 suction tube 23 stem 23a stem outer tube 23b stem inner tube 23c recess 23d enlarged diameter portion 23e valve seat 23f stem tube 24 piston 25 piston guide 25a inlet hole 25b fitting tube 26 spring 27 check valve 27a seal column 28 packing 29 retaining member 30 nozzle head 31 nozzle 31a nozzle hole 33 connecting portion 33a nozzle outer tube 33b nozzle inner tube 33c recess 33d nozzle tube 34 peripheral wall 36 top wall 40 valve body 50 Fitting member 51 Stem inner cylinder 52 Stem outer cylinder 53 Upper wall 54 Bottom wall 100, 200, 300, 400 Pump type ejection tool IN Inner flow passage NZ Nozzle flow passage O Central axis P Pressurizing chamber S Storage space

Claims (4)

An attachment part that is attached to the mouth of a container that contains the contents;
a pump fixed to the container by the mounting portion;
a nozzle head having a nozzle for ejecting the contents pumped by the pump to the outside,
The pump has a cylindrical stem that operates the pump when pressed and guides the pumped contents to the nozzle head,
the nozzle head has a cylindrical connecting portion fixed to an upper end portion of the stem,
one of the upper end portion of the stem and the connecting portion sandwiches the other from both sides in the radial direction, and thus the stem and the nozzle head are fixed by fitting together,
The contents flow radially inward from a portion where one of the upper end portion of the stem and the connecting portion sandwiches the other from both radial sides ,
A pump-type dispensing device characterized in that a stem outer tube erected on the upper end of the stem and a stem inner tube erected on the upper end of the stem radially inside the stem outer tube sandwich the connecting portion of the nozzle head from both radial sides . The pump-type dispensing device according to claim 1, wherein an outer nozzle cylinder that hangs down from the nozzle in the nozzle head and an inner nozzle cylinder that hangs down from the nozzle on the radially inner side of the outer nozzle cylinder sandwich the upper end of the stem from both radial sides. The pump-type dispensing device according to claim 1 , wherein a check valve body is seated on the base end of the stem inner tube, which allows the contents pumped from the pump to pass through while preventing the contents from flowing back from the nozzle. The pump-type dispensing device according to any one of claims 1 to 3 , wherein the material of the stem is polybutylene terephthalate and the material of the connecting portion is polypropylene.

Images