Pump type dispensing device

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

[Technical field]

[0001] The present disclosure relates to a pump-type dispensing device that is attached to the mouth of a container when in use. [Background technology]

[0002] 2. Description of the Related Art Some containers for storing contents such as cleansing agents and cosmetics are used with a pump-type dispensing device attached to the opening of the container to make it easy to remove the contents.

[0003] A known pump-type dispensing device for use with such containers, as described in Patent Document 1, for example, 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; when the nozzle head is pressed down, the pump is activated and the contents contained in the container are dispensed through a dispensing flow path in the nozzle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-83616 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional pump-type dispensing device, the outer peripheral surface of the upper end of the stem standing upward from the pump is fitted to the inner peripheral surface of the cylinder part 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 of the nozzle head and a polyester resin such as polybutylene terephthalate (PBT) is used as the material of 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.

[0006] An object of the present disclosure is to provide a pump-type spout that can prevent the content from leaking unintentionally by the user. [Means for solving the problem]

[0007] 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; Equipped with 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 sides in the radial direction. 、 A stem outer cylinder erected on the upper end of the stem and a stem inner cylinder erected on the upper end of the stem radially inside the stem outer cylinder sandwich the connecting portion of the nozzle head from both sides in the radial direction. It is characterized by:

[0008] In the pump-type dispensing device of the present disclosure, in the above-mentioned configuration, it is preferable that a nozzle outer tube hanging down from the nozzle in the nozzle head and a nozzle inner tube hanging down from the nozzle on the radially inner side of the nozzle outer tube sandwich the upper end of the stem from both radial sides.

[0010] In the pump-type dispensing device of the present disclosure, in the above-mentioned configuration, it is preferable that a valve element of a check valve is seated on the base end of the stem inner tube, which allows the contents pressurized from the pump to pass through while preventing the contents from flowing back from the nozzle.

[0011] In the pump type spout of the present disclosure having the above-mentioned configuration, it is preferable that the material of the stem is polybutylene terephthalate, and the material of the connecting portion is polypropylene. Effect of the Invention

[0012] According to the present disclosure, it is possible to provide a pump-type spout that can prevent the content from leaking unintentionally by the user. [Brief description of the drawings]

[0013] [Figure 1] FIG. 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) attached to a container. [Diagram 2] 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. [Diagram 3] FIG. 2 is an enlarged side cross-sectional view of a pump-type spout device according to a second embodiment of the present disclosure. [Figure 4] FIG. 11 is an enlarged side cross-sectional view of a pump-type spout device according to a third embodiment of the present disclosure. [Diagram 5] FIG. 11 is an enlarged side cross-sectional view of a pump-type spout device according to a fourth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a first embodiment of a pump type spout device of the present disclosure will be illustrated and described with reference to the drawings.

[0015] In this specification and claims, the vertical direction means the vertical direction in the state where the pump-type dispensing tool 100 is attached to the container 2 and is in an upright position as shown in FIG. 1. 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. The direction perpendicular to the vertical direction and the front-rear direction (the direction perpendicular to the paper surface in FIG. 1) is the lateral direction. The radially outer side 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 inner side 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 inner side and the radially outer side are sandwiched by different members.

[0016] 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 part 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 part 10, a pump 20, and a nozzle head 30.

[0017] The mounting portion 10 is made of synthetic resin material and is cylindrical with an inward flange 10c integrally formed at the upper end of the outer peripheral wall 10a, and is removably attached to the mouth portion 2a of the container 2 by threadingly engaging a female thread 10b on the inner surface of the outer peripheral wall 10a with a male thread 2b on the outer peripheral surface of the mouth portion 2a.

[0018] The outer peripheral wall 10a of the mounting portion 10 has a cylindrical shape as shown in Fig. 1. Also, a cylindrical inner peripheral wall 10d stands upward from the inner peripheral end of the flange 10c.

[0019] The pump 20 includes 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 defining an inner flow path IN that guides the pumped contents to the nozzle head 30, a piston 24 that is arranged inside the cylinder 21 and is free to move up and down, and when the stem 23 is pressed down, 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 bottom of the cylinder 21 by the spring 26.

[0020] An annular flange 21a that protrudes radially outward is integrally provided on the upper portion 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 state suspended inside the container 2 through the mouth 2a.

[0021] A piston guide 25 made of, for example, resin is accommodated inside the cylinder 21 so as to be movable up and down. The piston guide 25 is fixed to the stem 23 by fitting a fitting cylinder 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 cylinder 25b slidably contacts the outer peripheral surface of a seal pillar 27a erected upward from the check valve 27. The inner space of the fitting cylinder 25b and the stem 23 defines an inner flow passage IN that guides the contents pumped by the pump 20 to the nozzle head 30, and the lower end of the inner flow passage IN is closed by the seal pillar 27a.

[0022] 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 communicates the pressurized chamber P below the piston guide 25 with the inner flow passage IN, and when the piston guide 25 ascends, it operates to block communication between the pressurized chamber P and the inner flow passage 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 passage 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 passage from the pressurized chamber P to the inlet hole 25a is blocked. As a result, communication between the inner flow passage IN and the pressurizing chamber P is also blocked.

[0023] At the upper end of the stem 23, a stem outer tube 23a forming an outer circumferential surface and a stem inner tube 23b 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 hanging down from the base end of the nozzle 31 in the nozzle head 30 described later and a recess 33c formed between the nozzle outer tube 33a hanging 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 constitute 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.

[0024] 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 the polyolefin resin is an oleophilic (oil-absorbing) resin, when a cleaning agent or cosmetic containing hydrocarbon oil is contained in the container 2, the polyolefin resin may swell upon contact with the contents. In this embodiment, 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 as described above. With this configuration, even if the nozzle outer cylinder 33a expands in diameter in the radial direction outward in a direction away from the stem outer cylinder 23a due to swelling, the nozzle inner cylinder 33b also expands in diameter in the radial direction outward and approaches the stem outer cylinder 23a due to swelling, 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.

[0025] The materials used for the nozzle head 30 and the stem 23 are not limited to the above-mentioned embodiment, and other materials may be used. For example, the material of the stem 23 may be a polyester-based resin other than polybutylene terephthalate (PBT), and the material of the nozzle head 30 may be a polyolefin-based resin other than polypropylene (PP). The material of the stem 23 may be a polyolefin-based resin, and the material of the nozzle head 30 may be a polyester-based resin. The material of the stem 23 and the material of the nozzle head 30 may be the same material. The present disclosure has a particularly remarkable effect when the material of the stem 23 and the material of the nozzle head 30 are different materials.

[0026] 1, an expanded diameter portion 23d that is expanded radially outward is provided at the bottom of the stem 23. 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, thereby pressurizing the contents in the pressurizing chamber P and pumping them upward through the inner flow passage IN.

[0027] In this embodiment, the stem 23 and the piston guide 25 are formed separately and then assembled together. However, the present invention is not limited to this embodiment, and the stem 23 and the piston guide 25 may be integrally formed.

[0028] The nozzle head 30 includes a peripheral wall 34, a top wall 36 closing 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.

[0029] The pump 20 is actuated 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 move downward, the piston guide 25 moves downward relative to the piston 24, creating a gap between them, so that the inner flow path IN of the stem 23 communicates with the pressurized chamber P via the inlet hole 25a.

[0030] The downward movement of the piston 24 pressurizes the contents in the pressurizing chamber P, and when the inner flow passage IN of the stem 23 communicates with the pressurizing chamber P, the contents in the pressurizing chamber P flow into the inner flow passage IN from the inflow hole 25a, are further pumped upward in the inner flow passage IN, and are ejected to the outside from the nozzle hole 31a via the nozzle flow passage NZ of the nozzle head 30. In this embodiment, the seal pillar 27a moves upward in the fitting cylinder 25b, thereby further compressing the inner flow passage 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 from both sides in the radial direction by the nozzle outer cylinder 33a and the nozzle inner cylinder 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 passage NZ are prevented from leaking out from the gap between the nozzle head 30 and the stem 23.

[0031] On the other hand, when the top wall 36 is released from being pushed down, 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 and returns to its original position. The piston guide 25, which has started to move upward, abuts against the piston 24 again, blocking communication between the inner flow passage IN and the pressurized chamber P. Furthermore, 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 content contained in the container 2 is sucked into the inside of the pressurized chamber P through the suction tube 22.

[0032] A communication port 21b is provided in the side wall of the cylinder 21 at a position below the flange 21a, and when the inside of the container 2 becomes negative pressure, outside air is taken in through the communication port 21b, and the container 2 returns to its original shape. Note that when the container 2 is, for example, a pouch-shaped soft packaging body or a so-called delaminated container with a double structure, the shape of the container 2 does not need to be restored, so the communication port 21b does not need to be provided. In other words, the necessity for the communication port 21b depends on the form of the container 2.

[0033] 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 the 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 part 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 part 33 of the nozzle head 30, so that a seal can be maintained between the connecting part 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.

[0034] 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 radially inner side 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 in a direction away from the stem outer cylinder 23a due to swelling, the nozzle inner cylinder 33b also expands in diameter in a radially outward direction 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 suppress the contents in the nozzle flow path NZ from leaking out from the gap between the nozzle head 30 and the stem 23.

[0035] 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 spout 100 can be reduced by using an inexpensive material that swells easily for the nozzle head 30, which does not require high dimensional accuracy.

[0036] Next, a second embodiment of the pump type spout device of the present disclosure will be illustrated and described with reference to the drawings.

[0037] The pump type dispensing device 200 according to 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, the same reference numerals will be used to describe parts having the same functions as those in the first embodiment.

[0038] As shown in FIG. 3, a stem outer tube 23a that forms an outer peripheral surface and a stem inner tube 23b that is disposed radially inside the stem outer tube 23a are erected at the upper end of the stem 23. 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 constitute 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 liquid-tightly sealed.

[0039] In this embodiment, the lower part of the nozzle inner cylinder 33b hanging down from the nozzle 31 is sandwiched in a recess 23c formed by the stem outer cylinder 23a and the stem inner cylinder 23b erected on the upper end of the stem 23. With this configuration, compared to the first embodiment, it becomes more difficult for the contents to enter radially outward from the lower end of the nozzle inner cylinder 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.

[0040] As described above, in this embodiment, the stem outer cylinder 23a erected at the upper end of the stem 23 and the stem inner cylinder 23b erected at the upper end of the stem 23 radially inside the stem outer cylinder 23a are configured to sandwich the connecting portion 33 (nozzle inner cylinder 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 cylinder 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.

[0041] Next, a third embodiment of the pump type dispensing device of the present disclosure will be illustrated and described with reference to the drawings.

[0042] The pump type dispensing device 300 according to 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, the same reference numerals will be used to describe parts having the same functions as those in the first embodiment.

[0043] As shown in FIG. 4, a stem outer tube 23a that forms an outer peripheral surface and a stem inner tube 23b that is disposed radially inside the stem outer tube 23a are erected at the upper end of the stem 23. In this embodiment, the stem outer tube 23a is formed 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 a recess 23c formed by the stem outer tube 23a and the stem inner tube 23b. That is, 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 are erected from the upper end of the stem 23.

[0044] With the above-mentioned configuration, the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30 are liquid-tightly sealed. That is, when the nozzle cylinder 33d expands radially outward due to swelling, the nozzle cylinder 33d is tightly attached to the stem outer cylinder 23a arranged radially outward of the nozzle cylinder 33d. In addition, since the stem inner cylinder 23b is erected radially inward of the nozzle cylinder 33d, it is possible to effectively prevent the contents from entering the lower end of the nozzle cylinder 33d. Therefore, it is possible to improve the sealing performance between the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30.

[0045] In particular, in this embodiment, as shown in Fig. 4, a valve seat 23e that functions as a 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 a user presses the nozzle head 30 to operate the pump 20, the valve body 40 is displaced upward away from the valve seat 23e due to an increase in pressure in the inner flow path IN as the contents are pumped out. This opens the check valve formed by the valve body 40, and the contents in the container 2 are ejected to the outside through the inner flow path IN and the nozzle flow path NZ. Also, when the pressure on the nozzle head 30 is released, the pressure in the inner flow path IN becomes negative, 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.

[0046] In this way, since the valve body 40 is seated on the valve seat 23e provided at the base end of the stem inner cylinder 23b when the pump 20 is not operating, the stem inner cylinder 23b is configured to be less likely to be displaced radially inward. From this point of view, the force with which the stem outer cylinder 23a and the stem inner cylinder 23b pinch the connecting part 33 (nozzle cylinder 33d) of the nozzle head 30 from both sides in the radial direction is not weakened, so that the sealing performance between the upper end of the stem 23 and the connecting part 33 of the nozzle head 30 can be improved.

[0047] As described above, in this embodiment, the base end of the stem inner cylinder 23b is configured to seat the valve body 40 of the check valve that allows the contents pumped from the pump 20 to pass and prevents the contents from flowing back from the nozzle 31. By adopting such a configuration, the stem inner cylinder 23b is prevented from being displaced radially inward by 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. Therefore, the sealing performance between the upper end of the stem 23 and the connecting part 33 of the nozzle head 30 can be improved.

[0048] Next, a fourth embodiment of the pump type spout device of the present disclosure will be illustrated and described with reference to the drawings.

[0049] The pump type dispensing device 400 according to 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, the same reference numerals will be used to describe parts having the same functions as those in the first embodiment.

[0050] 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.

[0051] With the above-mentioned configuration, the fitting member 50 attached to the upper end of the stem 23 and the nozzle cylinder 33d serving as the connecting portion 33 of the nozzle head 30 are liquid-tightly sealed. That is, when the nozzle cylinder 33d expands radially outward due to swelling, the adhesion force to the stem outer cylinder 52 arranged radially outward of the nozzle cylinder 33d is strengthened. In addition, since the stem inner cylinder 51 is erected radially inward of the nozzle cylinder 33d, it is possible to effectively prevent the contents from entering the lower end of the nozzle cylinder 33d. Therefore, it is possible to improve the sealing property between the fitting member 50 attached to the upper end of the stem 23 and the connecting portion 33 of the nozzle head 30.

[0052] 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 (the case of the stem outer tube 23a and the stem inner tube 23b), but also include the case where they are provided on a member formed of the same or similar material as the stem 23 (the case of the stem outer tube 52 and the stem inner tube 51). Note that the same material in this case means, for example, a material mainly composed of the same polyester resin.

[0053] In addition, the nozzle outer cylinder and the nozzle inner cylinder are not limited to being integrally formed with the nozzle head 30, but may 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.

[0054] Although the present disclosure has been described based on the drawings and embodiments, 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 corrections are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to cause logical inconsistency, 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.

[0055] For example, the present disclosure envisages a case in which the contents include 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 embodiment, and is also effective when storing other contents that cause swelling of polyolefin-based resins.

[0056] 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.

[0057] Furthermore, the pump 20 is not limited to the above-mentioned configuration, and other configurations may be used as long as they are actuated by pushing down the stem 23. [Explanation of symbols]

[0058] 2 containers 2a Mouth 2b Male thread 10. Mounting Part 10a outer wall 10b Female thread 10c flange 10d inner wall 20 Pump 21 Cylinder 21a Flange 21b Communication port 21c valve seat 21d Fitting cylinder part 22 Suction tube 23 Stem 23a Stem outer tube 23b Stem inner tube 23c recess 23d Expanded diameter part 23e valve seat 23f Stem tube 24 Piston 25 Piston guide 25a Inflow hole 25b Mating tube 26 Spring 27 Check valve 27a Seal pillar 28 Packing 29 Retaining member 30 Nozzle Head 31 Nozzle 31a Nozzle hole 33 Connecting part 33a Nozzle outer cylinder 33b Nozzle inner cylinder 33c recess 33d Nozzle tube 34 Peripheral wall 36 Ceiling Wall 40 Valve body 50 Fitting member 51 Stem inner tube 52 Stem outer tube 53 Upper Wall 54 Bottom wall 100,200,300,400 Pump type dispenser IN Inner flow passage NZ Nozzle flow path O center axis P Pressurized chamber S Storage space

Claims

1. 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; Equipped with 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.

2. 2. The pump-type dispensing device according to claim 1, wherein a nozzle outer tube that hangs down from the nozzle in the nozzle head and a nozzle inner tube that hangs down from the nozzle on the radially inner side of the nozzle outer tube sandwich the upper end of the stem from both radial sides.

3. 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.

4. 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.

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