JP2022041269A - Pump type dispenser - Google Patents

Abstract

To provide a pump type dispenser that can suppress leakage of contents unintended by a user.SOLUTION: A pump type dispenser 100 of the present disclosure includes: a mounting part 10 mounted on a mouth part 2a of a container 2 for containing contents; a pump 20 fixed to the container 2 by the mounting part 10; and a nozzle head 30 having a nozzle 31 for discharging the contents pumped by the pump 20 to the outside. The pump 20 has a tubular stem 23 that operates the pump 20 by pressing, and guides the pumped contents to the nozzle head 30. The nozzle head 30 has a tubular connecting part 33 that is fixed to an upper end of the stem 23. Either the upper end of the stem 23 or the connecting part 33 sandwiches the other from both sides in a diameter direction so that the stem 23 and the nozzle head 30 are fixed by being fitted with each other.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a pump-type dispenser used by being attached to the mouth of a container.

As a container for storing cleaning agents, cosmetics, etc. as contents, there is a container used by attaching a pump-type dispenser to the mouth of the container so that the contents can be easily taken out. ..

Examples of the pump-type dispenser used for such a container include a mounting portion mounted on the mouth of the container, a pump fixed to the container by the mounting portion, and a pump, as described in Patent Document 1. It has a synthetic resin nozzle head that is connected to the stem and has a nozzle that extends substantially horizontally, and when the nozzle head is pushed down, the pump operates to move the contents contained in the container into the nozzle. It is known that the pump is poured through the pouring channel.

Japanese Unexamined Patent Publication No. 2016-83616

By the way, in the above-mentioned conventional pump-type dispenser, the outer peripheral surface of the upper end portion of the stem erected above the pump is fitted to the inner peripheral surface of the tubular portion hanging 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 of the nozzle head and a polyester resin such as polybutylene terephthalate (PBT) is used as the material of the stem, the nozzle may be used depending on the type of contents to be contained in the container. There was room for improvement because the head was inflated and the contents could leak to the outside through the gap between the nozzle head and the stem caused by the inflating.

An object of the present disclosure is to provide a pump-type dispenser capable of suppressing leakage of contents unintended by the user.

The pump-type dispenser of the present disclosure is
A mounting part that is attached to the mouth of the container that houses 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 is provided.
The pump has a cylindrical stem that activates the pump by pressing and guides the pumped contents to the nozzle head.
The nozzle head has a cylindrical connecting portion fixed to the upper end portion of the stem.
One of the upper end portion and the connecting portion of the stem sandwiches the other from both sides in the radial direction, whereby the stem and the nozzle head are fixed by fitting.

In the pump-type dispenser of the present disclosure, in the above configuration, the nozzle outer cylinder hanging from the nozzle in the nozzle head and the nozzle inner cylinder hanging from the nozzle inside the nozzle outer cylinder in the radial direction are the stems. It is preferable that the upper end portion is sandwiched from both sides in the radial direction.

In the above configuration, the pump type dispenser of the present disclosure includes a stem outer cylinder erected at the upper end portion of the stem and a stem inner cylinder erected at the upper end portion of the stem inside the stem outer cylinder in the radial direction. It is preferable that the connecting portion of the nozzle head is sandwiched from both sides in the radial direction.

In the above-described configuration, the pump-type dispenser of the present disclosure allows the contents pumped from the pump to pass through the base end of the stem inner cylinder, and is a check valve that suppresses the backflow of the contents from the nozzle. It is preferred that the valve body of the valve be seated.

In the pump-type dispenser of the present disclosure, 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.

According to the present disclosure, it is possible to provide a pump-type dispenser capable of suppressing leakage of contents unintended by the user.

It is a side sectional view of the state (initial state) in which the pump type dispenser which is 1st Embodiment of this disclosure is attached to a container. FIG. 3 is a side sectional view showing a state in which the nozzle head is pressed from the state of FIG. 1 to eject the contents. It is a side enlarged sectional view of the pump type dispenser which is 2nd Embodiment of this disclosure. It is a side enlarged sectional view of the pump type dispenser which is the 3rd Embodiment of this disclosure. It is a side enlarged sectional view of the pump type dispenser which is 4th Embodiment of this disclosure.

Hereinafter, the first embodiment of the pump-type dispenser of the present disclosure will be exemplified and described with reference to the drawings.

In the present specification and claims, the vertical direction means the vertical direction in a state where the pump-type dispenser 100 is attached to the container 2 and is in an upright posture as shown in FIG. Further, the side where the nozzle 31 is provided (the left side in FIG. 1) is the front, and the opposite side (the right side in FIG. 1) is the rear. Further, the direction orthogonal to the vertical direction and the front-back direction (the direction perpendicular to the paper surface in FIG. 1) is defined as the lateral direction. Further, the radial outer side is a direction away from the central axis O along a straight line perpendicular to the central axis O through the central axis O, and the radial inner side is a direction perpendicular to the central axis O through the central axis O. It is assumed to mean the direction toward the central axis O along a straight line. The circumferential position is assumed to mean an angular position around the central axis O. Further, in the present specification and claims, "sandwiching from both sides in the radial direction" means sandwiching from both sides in the radial direction by the same member, and when sandwiching by another member from the inner side in the radial direction and the outer side in the radial direction. It shall not be included.

The pump-type dispenser 100 of the first embodiment of the present disclosure shown in FIG. 1 is used as a pump-type dispenser by being attached to the mouth portion 2a of the container 2, and is housed in the storage space S of the container 2. It is for pouring out the contents that are present. As shown in FIG. 1, the pump-type dispenser 100 has a mounting portion 10, a pump 20, and a nozzle head 30.

The mounting portion 10 is made of a synthetic resin material and is formed in a cylindrical shape with an inward flange 10c integrally provided at the upper end portion of the outer peripheral wall 10a. It is detachably attached to the mouth portion 2a of the container 2 by being screwed to the male screw 2b provided on the outer peripheral surface of the portion 2a.

The outer peripheral wall 10a of the mounting portion 10 has a cylindrical shape as shown in FIG. Further, a cylindrical inner peripheral wall 10d is erected above the inner peripheral end of the flange 10c.

The pump 20 has a cylinder 21 having a tubular outer shape, a suction pipe 22 attached to a fitting cylinder portion 21d at the bottom of the cylinder 21, and an inner flow path IN that guides the pumped contents to the nozzle head 30. A tubular stem 23 that forms a partition, and a piston 24 that is movably arranged inside the cylinder 21 and moves downward when the stem 23 is pushed down to discharge the contents inside the cylinder 21 from the upper end of the stem 23. Between the piston guide 25 that guides the piston 24 in a state where it can abut from below, the spring 26 that urges the piston guide 25 and the stem 23 upward, and the suction pipe 22 and the inside of the cylinder 21. It has a check valve 27 that opens and closes, and a holding member 29 that holds the stem 23 in a slidable state 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 with respect to the lower part of the cylinder 21 by the spring 26.

An annular flange 21a projecting outward in the radial direction is integrally provided on the upper portion of the cylinder 21. In the pump 20, the flange 21a is sandwiched between the packing 28 arranged at the upper end of the mouth portion 2a of the container 2 and the flange 10c of the mounting portion 10 screwed to the mouth portion 2a, whereby the container 2 is held. It is fixed to the mouth portion 2a and supported in a state of being suspended inside the container 2 through the mouth portion 2a.

Inside the cylinder 21, for example, a piston guide 25 made of resin is housed so as to be able to move up and down. The piston guide 25 is fixed to the stem 23 by fitting the fitting cylinder 25b erected above the inner peripheral end to the inner peripheral surface of the stem 23. A piston 24 is arranged above the piston guide 25. Further, the inner peripheral surface of the lower end portion of the fitting cylinder 25b is slidably in contact with the outer peripheral surface of the seal column 27a erected above the check valve 27. The inner space of the fitting cylinder 25b and the stem 23 partitions the inner flow path IN that guides the contents pumped by the pump 20 to the nozzle head 30, and the lower end portion of the inner flow path IN is formed by the seal column 27a. It is blocked.

The piston 24 is slidable with respect to the inner surface of the cylinder 21 and is guided by the piston guide 25. When the piston guide 25 descends, the pressurizing chamber P below the piston guide 25 communicates with the inner flow path IN, and when the piston guide 25 rises, the communication between the pressurizing chamber P and the inner flow path IN is cut off. Operate. More specifically, as shown in FIG. 1, the piston 24 is formed of an elastic body into a sealed body having an H-shaped cross section, and is slidably contacted with the inner surface of the cylinder 21 on the outer peripheral side thereof and fitted on the inner peripheral side. It is movable in the vertical direction along the outer peripheral surface of the cylinder 25b. Then, when the piston guide 25 descends, the piston guide 25 moves downward relative to the piston 24 and separates from the piston 24, so that the pressurizing chamber P passes through the inflow hole 25a provided at substantially the center height of the fitting cylinder 25b. And communicate with the inner flow path IN. On the other hand, when the piston guide 25 rises, it comes into contact with the piston 24, so that the flow path from the pressurizing chamber P to the inflow hole 25a is blocked. As a result, the communication between the inner flow path IN and the pressurizing chamber P is also cut off.

At the upper end of the stem 23, a stem outer cylinder 23a forming an outer peripheral surface and a stem inner cylinder 23b arranged radially inside the stem outer cylinder 23a are erected. In the present embodiment, the stem outer cylinder 23a is formed longer in the vertical direction than the stem inner cylinder 23b, and the upper portion of the stem outer cylinder 23a is outside the nozzle hanging from the base end portion of the nozzle 31 in the nozzle head 30 described later. It is sandwiched between the recesses 33c formed between the cylinder 33a and the nozzle inner cylinder 33b hanging from the nozzle 31 on the radial inside of the nozzle 33a and the nozzle outer cylinder 33a. That is, the nozzle outer cylinder 33a, the nozzle inner cylinder 33b, and the recess 33c form a connecting portion 33 that fits and fixes the upper end portion of the stem 23. As a result, the upper end portion of the stem 23 and the connecting portion 33 of the nozzle head 30 are fixed in a liquid-tightly sealed state.

In this embodiment, polybutylene terephthalate (PBT), which is a polyester resin, is used as the material of the stem 23, and polypropylene (PP), which is a polyolefin resin, is used as the material of the nozzle head 30. Since the polyolefin-based resin is a lipophilic (oil-absorbing) resin, for example, when a cleaning agent containing a hydrocarbon oil, cosmetics, or the like is contained in the container 2 as a content, the polyolefin-based resin touches the content and swells. Sometimes. In the present embodiment, as described above, the upper end portion 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 cylinder 33a expands radially outward in the direction away from the stem outer cylinder 23a due to swelling, the nozzle inner cylinder 33b also expands radially outward due to swelling to the stem outer cylinder 23a. Since they are close to each other, the seal between the connecting portion 33 of the nozzle head 30 and the upper end portion of the stem 23 can be maintained.

The material used for the nozzle head 30 and the stem 23 is not limited to the above aspect, and other materials may be used. For example, a polyester resin other than polybutylene terephthalate (PBT) may be used as the material of the stem 23, or a polyolefin resin other than polypropylene (PP) may be used as the material of the nozzle head 30. Further, a polyolefin resin may be used as the material of the stem 23, or a polyester resin may be used as the material of the nozzle head 30. Further, the same kind of material may be used for the material of the stem 23 and the material of the nozzle head 30. The present disclosure has a particularly remarkable effect when different materials are used for the material of the stem 23 and the material of the nozzle head 30.

As shown in FIG. 1, a diameter-expanded portion 23d whose diameter is expanded outward in the radial direction is provided in the lower portion of the stem 23. When the stem 23 is pushed down by pressing the nozzle head 30, the enlarged diameter portion 23d of the stem 23 pushes down the piston 24 to pressurize the contents in the pressurizing chamber P and pump it upward through the inner flow path IN. do.

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

The nozzle head 30 includes a peripheral wall 34, a top wall 36 that closes the upper end of the peripheral wall 34, and a nozzle outer cylinder 33a and a nozzle inner cylinder 33b as connecting portions 33 that hang down from the top wall 36 on the radial inside of the peripheral wall 34. , A nozzle 31 projecting forward from the peripheral wall 34 is provided. The space inside the connecting portion 33 in the radial direction 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 operates by pushing the stem 23 downward against the urging force of the spring 26. That is, when the user pushes down 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 stem 23 are fixed to the stem 23 via the fitting cylinder 25b. The piston guide 25 is also pushed downward. Further, since the enlarged diameter portion 23d of the stem 23 comes into contact with the piston 24, the piston 24 also starts moving downward behind the piston guide 25. When the piston guide 25 starts descending, the piston guide 25 moves downward relative to the piston 24 and a gap is created between the two. Therefore, the inner flow path IN of the stem 23 passes through the inflow hole 25a to the pressurizing chamber P. Communicate with.

Since the contents in the pressurizing chamber P are pressurized by the downward movement of the piston 24, when the inner flow path IN of the stem 23 and the pressurizing chamber P communicate with each other, the contents in the pressurizing chamber P flow in. It flows into the inner flow path IN from the hole 25a, is further pressure-fed upward in the inner flow path IN, and is ejected from the nozzle hole 31a to the outside via the nozzle flow path NZ of the nozzle head 30. In the present embodiment, the seal column 27a moves upward in the fitting cylinder 25b to further compress the inside of the inner flow path IN, so that the contents can be effectively pumped toward the nozzle head 30. .. As described above, since the upper end of the stem 23 is sandwiched between the nozzle outer cylinder 33a and the nozzle inner cylinder 33b from both sides in the radial direction, even if the nozzle head 30 absorbs the contents and swells, the nozzle head The seal between the connecting portion 33 of 30 and the upper end portion of the stem 23 is maintained in good condition. Therefore, it is possible to prevent the contents in the nozzle flow path NZ from leaking to the outside through the gap between the nozzle head 30 and the stem 23 when the contents are ejected.

On the other hand, when the pushing down of the top wall 36 is released, the piston guide 25 is pushed upward together with the stem 23 and the nozzle head 30 by the urging force of the spring 26 to return to the original position. The piston guide 25, which has started to move upward, comes into contact with the piston 24 again and cuts off the communication between the inner flow path IN and the pressurizing chamber P. Further, when the piston 24 moves upward together with the piston guide 25, the inside of the pressurizing chamber P of the cylinder 21 becomes a negative pressure, and the check valve 27 is opened apart from the valve seat 21c, so that it is housed in the container 2. The contents are sucked into the pressure chamber P through the suction pipe 22.

A communication port 21b is provided on the side wall of the cylinder 21 at a position below the flange 21a, and when the inside of the container 2 is in a negative pressure state, outside air is taken in from the communication port 21b and the container 2 is restored. When the container 2 is, for example, a pouch-shaped flexible package or a so-called delamination container having a double structure, it is not necessary to restore the shape of the container 2, so that the communication port 21b may not be provided. That is, the need for the communication port 21b depends on the form of the container 2.

As described above, the pump-type dispenser 100 according to the present embodiment has a mounting portion 10 mounted on the mouth portion 2a of the container 2 for accommodating the contents and a pump 20 fixed to the container 2 by the mounting portion 10. And a nozzle head 30 having a nozzle 31 for ejecting the contents pumped by the pump 20 to the outside, the pump 20 operates the pump 20 by pressing and guides the pumped contents to the nozzle head 30. The nozzle head 30 has a tubular stem 23, and the nozzle head 30 has a tubular connecting portion 33 fixed to the upper end portion of the stem 23, and one of the upper end portion and the connecting portion 33 of the stem 23 is radially the other. By sandwiching from both sides, the stem 23 and the nozzle head 30 are configured to be fixed by fitting. By adopting such a configuration, even if the connecting portion 33 of the nozzle head 30 absorbs the contents and expands in diameter outward in the radial direction due to swelling, for example, the upper end portion of the stem 23 has a diameter due to the connecting portion 33 of the nozzle head 30. By being sandwiched from both sides in the direction, the seal between the connecting portion 33 of the nozzle head 30 and the upper end portion of the stem 23 can be maintained. Therefore, it is possible to prevent the contents in the nozzle flow path NZ from leaking to the outside through the gap between the nozzle head 30 and the stem 23.

Further, in the present embodiment, the nozzle outer cylinder 33a hanging from the nozzle 31 in the nozzle head 30 and the nozzle inner cylinder 33b hanging from the nozzle 31 inside the nozzle outer cylinder 33a in the radial direction have a diameter of the upper end portion of the stem 23. It was configured to be sandwiched from both sides in the direction. By adopting such a configuration, even if the nozzle outer cylinder 33a absorbs the contents and expands in a direction away from the stem outer cylinder 23a radially outward due to swelling, the nozzle inner cylinder 33b also expands radially outward due to swelling. Since the diameter is expanded to 2 and the stem outer cylinder 23a is brought into close contact with the nozzle head 30, the seal between the connecting portion 33 of the nozzle head 30 and the upper end portion of the stem 23 can be maintained. Therefore, it is possible to prevent the contents in the nozzle flow path NZ from leaking to the outside through the gap between the nozzle head 30 and the stem 23.

Further, in the present embodiment, the material of the stem 23 is polybutylene terephthalate, and the material of the connecting portion 33 is polypropylene. By adopting such a configuration, the manufacturing cost of the pump-type dispenser 100 can be suppressed by using an inexpensive material that easily swells in the nozzle head 30 that does not require high dimensional accuracy.

Next, a second embodiment of the pump-type dispenser of the present disclosure will be exemplified with reference to the drawings.

The pump-type dispenser 200 according to the present embodiment is similar to the first embodiment except that the configuration of the fitting portion between the nozzle head 30 and the stem 23 is different from that of the first embodiment. .. Therefore, here, the differences from the first embodiment will be mainly described. Further, the parts having the same functions as those of the first embodiment will be described with the same reference numerals.

As shown in FIG. 3, a stem outer cylinder 23a forming an outer peripheral surface and a stem inner cylinder 23b arranged radially inside the stem outer cylinder 23a are erected on the upper end portion of the stem 23. In the present embodiment, the stem outer cylinder 23a is formed longer than the stem inner cylinder 23b in the vertical direction. Further, the upper portion of the stem outer cylinder 23a is between the nozzle outer cylinder 33a hanging from the base end portion of the nozzle 31 in the nozzle head 30 and the nozzle inner cylinder 33b hanging from the nozzle 31 inside the nozzle outer cylinder 33a in the radial direction. It is sandwiched between the formed recesses 33c. That is, the nozzle outer cylinder 33a, the nozzle inner cylinder 33b, and the recess 33c form a connecting portion 33 that fits and fixes the upper end portion of the stem 23. As a result, the upper end portion of the stem 23 and the connecting portion 33 of the nozzle head 30 are hermetically sealed.

Further, in the present embodiment, the lower portion of the nozzle inner cylinder 33b hanging from the nozzle 31 is sandwiched between the recess 23c formed by the stem outer cylinder 23a and the stem inner cylinder 23b erected at the upper end of the stem 23. There is. With this configuration, as compared with the first embodiment, it is difficult for the contents to enter radially outside from the lower end portion of the nozzle inner cylinder 33b, so that the gap between the connecting portion 33 of the nozzle head 30 and the upper end portion of the stem 23 It is possible to more effectively suppress the leakage of the contents from.

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

Next, a third embodiment of the pump-type dispenser of the present disclosure will be exemplified with reference to the drawings.

The pump-type dispenser 300 according to the present embodiment is similar to the first embodiment except that the configuration of the fitting portion between the nozzle head 30 and the stem 23 is different from that of the first embodiment. .. Therefore, here, the differences from the first embodiment will be mainly described. Further, the parts having the same functions as those of the first embodiment will be described with the same reference numerals.

As shown in FIG. 4, the stem outer cylinder 23a forming the outer peripheral surface and the stem inner cylinder 23b arranged radially inside the stem outer cylinder 23a are erected on the upper end portion of the stem 23. In the present embodiment, the stem outer cylinder 23a is formed longer than the stem inner cylinder 23b in the vertical direction. A nozzle cylinder 33d as a connecting portion 33 hanging from the base end portion of the nozzle 31 in the nozzle head 30 is fitted in the recess 23c formed by the stem outer cylinder 23a and the stem inner cylinder 23b. That is, the nozzle cylinder 33d of the nozzle head 30 is sandwiched from both sides in the radial direction by the stem outer cylinder 23a and the stem inner cylinder 23b that are erected from the upper end of the stem 23.

With the above configuration, the upper end portion of the stem 23 and the connecting portion 33 of the nozzle head 30 are liquidtightly sealed. That is, when the nozzle cylinder 33d expands in diameter outward in the radial direction due to swelling, the adhesion to the stem outer cylinder 23a arranged on the radial outer side of the nozzle cylinder 33d is strengthened. Further, since the stem inner cylinder 23b is erected inside the nozzle cylinder 33d in the radial direction, it is possible to effectively prevent the contents from entering the lower end portion of the nozzle cylinder 33d. Therefore, the sealing property between the upper end portion of the stem 23 and the connecting portion 33 of the nozzle head 30 can be improved.

In particular, in the present embodiment, as shown in FIG. 4, a valve seat 23e that functions as a part of the check valve is formed at the base end portion of the stem inner cylinder 23b, and the spherical valve body 40 is the valve seat 23e. It is configured to sit in. When the user presses the nozzle head 30 to operate the pump 20, the valve body 40 is displaced upward by being separated from the valve seat 23e by increasing the pressure in the inner flow path IN due to the pressure feeding of the contents. do. As a result, the check valve by the valve body 40 is opened, and the contents in the container 2 are ejected to the outside through the inner flow path IN and the nozzle flow path NZ. Further, when the pressure of the nozzle head 30 is released, the inside of the inner flow path IN becomes a negative pressure, and the valve body 40 is seated on the valve seat 23e again, so that the check valve by the valve body 40 is closed.

As described above, since the valve body 40 is seated on the valve seat 23e provided at the base end portion of the stem inner cylinder 23b when the pump 20 is not operated, the stem inner cylinder 23b is hardly displaced inward in the radial direction. Has been done. From this point as well, the force of sandwiching the connecting portion 33 (nozzle cylinder 33d) of the nozzle head 30 from both sides in the radial direction is not weakened by the stem outer cylinder 23a and the stem inner cylinder 23b, so that the upper end portion of the stem 23 and the nozzle head are not weakened. It is possible to improve the sealing property between the connecting portion 33 of 30 and the connecting portion 33.

As described above, in the present embodiment, the check valve is provided with a check valve that allows the contents pumped from the pump 20 to pass through the base end portion of the stem inner cylinder 23b and suppresses the backflow of the contents from the nozzle 31. The valve body 40 was configured to be seated. By adopting such a configuration, it is possible to prevent the stem inner cylinder 23b from being displaced inward in the radial direction due to the seating of the valve body 40, so that the configuration in which the nozzle cylinder 33d is sandwiched between the stem outer cylinder 23a and the stem inner cylinder 23b is maintained. Will be done. Therefore, the sealing property between the upper end portion 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 dispenser of the present disclosure will be exemplified with reference to the drawings.

The pump-type dispenser 400 according to the present embodiment is similar to the first embodiment except that the configuration of the fitting portion between the nozzle head 30 and the stem 23 is different from that of the first embodiment. .. Therefore, here, the differences from the first embodiment will be mainly described. Further, the parts having the same functions as those of the first embodiment will be described with the same reference numerals.

As shown in FIG. 5, a stem cylinder 23f is erected at the upper end of the stem 23. Further, a fitting member 50 made of polybutylene terephthalate (PBT), which is the same polyester resin as the stem 23, is mounted on the radial outer side of the stem cylinder 23f. The fitting member 50 has a bottom that horizontally connects the stem outer cylinder 52, the stem inner cylinder 51 provided inside the stem outer cylinder 52 in the radial direction, and the lower ends of the stem outer cylinder 52 and the stem inner cylinder 51 in the horizontal direction. It includes a wall 54 and an upper wall 53 extending radially inward from the upper end of the stem inner cylinder 51 and abutting on the upper end of the stem cylinder 23f. The fitting member 50 functions as a part of the stem 23 by being mounted on the stem cylinder 23f, and the stem outer cylinder 52 and the stem inner cylinder 51 of the fitting member 50 are connecting portions 33 of the nozzle head 30. The nozzle cylinder 33d is sandwiched from both sides in the radial direction.

With the above configuration, the fitting member 50 mounted on the upper end portion of the stem 23 and the nozzle cylinder 33d as the connecting portion 33 of the nozzle head 30 are liquidtightly sealed. That is, when the nozzle cylinder 33d expands in diameter outward in the radial direction due to swelling, the adhesion to the stem outer cylinder 52 arranged on the radial outer side of the nozzle cylinder 33d is strengthened. Further, since the stem inner cylinder 51 is erected inside the nozzle cylinder 33d in the radial direction, it is possible to effectively suppress the contents from entering the lower end portion of the nozzle cylinder 33d. Therefore, it is possible to improve the sealing property between the fitting member 50 mounted on the upper end portion of the stem 23 and the connecting portion 33 of the nozzle head 30.

As shown in the above example, the stem outer cylinder and the stem inner cylinder are not limited to the case where the stem outer cylinder and the stem inner cylinder are integrally formed at the upper end portion of the stem 23 (in the case of the stem outer cylinder 23a and the stem inner cylinder 23b), and the stem 23 and the stem 23. It shall also include the case where it is provided on a member made of the same or the same kind of material (in the case of the stem outer cylinder 52 and the stem inner cylinder 51). In this case, the same kind of material means, for example, a material containing the same polyester resin as a main component.

Further, the nozzle outer cylinder and the nozzle inner cylinder are not limited to the case where they are integrally formed with the nozzle head 30, but also include the case where they are provided on a member made of the same or the same kind of material as the nozzle head 30. .. In this case, the same kind of material means, for example, a material containing the same polyolefin resin as a main component.

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

For example, in the present disclosure, it is assumed that a cleaning agent or cosmetic containing a hydrocarbon oil which is said to cause swelling of the nozzle head 30 is contained as a content, but the present invention is not limited to this embodiment and is a polyolefin resin. It is also effective when containing other contents that cause swelling.

Further, in the present disclosure, for example, "fixed to the stem" is not limited to the case where it is directly attached to the stem 23, but also includes the case where it is fixed to the stem 23 via another member. The same applies to members other than the stem 23.

Further, the pump 20 is not limited to the above-described configuration, and any other configuration may be adopted as long as the pump 20 operates by pushing down the stem 23.

2 Container 2a Mouth 2b Male screw 10 Mounting part 10a Outer wall 10b Female thread 10c Flange 10d Inner peripheral wall 20 Pump 21 Cylinder 21a Flange 21b Communication port 21c Valve seat 21d Fitting cylinder 22 Suction pipe 23 Stem 23a Stem outer cylinder 23b Stem inner cylinder 23c Recess 23d Enlarged part 23e Valve seat 23f Stem cylinder 24 Piston 25 Piston guide 25a Inflow hole 25b Fitting cylinder 26 Spring 27 Check valve 27a Seal column 28 Packing 29 Holding member 30 Nozzle head 31 Nozzle 31a Nozzle hole 33 Connecting part 33a Nozzle outer cylinder 33b Nozzle inner cylinder 33c Recess 33d Nozzle cylinder 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 Note Outer IN Inner flow path NZ Nozzle flow path O Center axis P Pressurization chamber S Accommodation space

Claims (5)

A mounting part that is attached to the mouth of the container that houses 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 is provided.
The pump has a cylindrical stem that activates the pump by pressing and guides the pumped contents to the nozzle head.
The nozzle head has a cylindrical connecting portion fixed to the upper end portion of the stem.
A pump-type dispenser, characterized in that the stem and the nozzle head are fixed by fitting by one of the upper end portion and the connecting portion of the stem sandwiching the other from both sides in the radial direction. A claim that the nozzle outer cylinder hanging from the nozzle in the nozzle head and the nozzle inner cylinder hanging from the nozzle on the radial inside of the nozzle outer cylinder sandwich the upper end portion of the stem from both sides in the radial direction. The pump type dispenser according to 1. The stem outer cylinder erected at the upper end portion of the stem and the stem inner cylinder erected at the upper end portion of the stem inside the stem outer cylinder in the radial direction form the connecting portion of the nozzle head in the radial direction. The pump-type dispenser according to claim 1 or 2, which is sandwiched from both sides. The third aspect of the present invention, wherein a check valve body for passing the contents pumped from the pump and suppressing the backflow of the contents from the nozzle is seated at the base end of the stem inner cylinder. Pump type dispenser. The pump-type dispenser according to any one of claims 1 to 4, wherein the material of the stem is polybutylene terephthalate and the material of the connecting portion is polypropylene.

Images