JP7301481B2 - liquid ejector - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a liquid ejector that is attached to the mouth of a container body and ejects the contents inside the container body to the outside.

As a conventional liquid ejector, for example, as shown in Patent Document 1, there is a mounting cylinder portion that is mounted on the mouth of a container body, and a mounting cylinder portion that hangs downward from the mounting cylinder portion and ejects the contents (liquid) in the container body. A pump for pumping upward and a nozzle head attached to a stem erected upward from the pump are provided, and the pump is operated by pressing down the nozzle head, and the contents pumped upward are provided in the nozzle head. Disclosed is one in which the liquid is discharged from a nozzle cylinder to the outside.

In the liquid ejector of Patent Document 1, when the nozzle head is released from being depressed, negative pressure is applied to the inside of the nozzle cylinder provided in the nozzle head due to the negative pressure in the pump, and the liquid inside the nozzle cylinder is pushed to the pump side. A phenomenon of sucking back (suckback) occurs.

Due to the suckback described above, the liquid remaining in the nozzle cylinder is sucked toward the pump side and drawn to the base of the nozzle cylinder, so air taken in from the outside is introduced to the tip of the nozzle cylinder. Therefore, since the liquid does not remain at the tip of the nozzle tube, it is possible to suppress the liquid from dripping from the tip of the nozzle tube.

JP 2012-251440 A

However, in the liquid ejector of Patent Document 1, the tip of the nozzle cylinder is oriented so as to be inclined downward toward the tip so that the user can easily pick up and use the ejected liquid ( See FIG. 1 of Patent Document 1, etc.). In this case, the liquid discharged from the tip of the nozzle tube may flow around the outside of the nozzle tube and adhere to the outer surface. In some cases, the liquid adhering to the outer surface of the nozzle tube is not drawn into the root of the nozzle tube even by the above-described suckback, and remains at the tip of the nozzle tube. In this case, the inside of the nozzle cylinder contains (i) the liquid that originally remained in the nozzle cylinder and was drawn into the root by suckback, and (ii) the liquid that was newly taken in from the outside by suckback and was at the root. and (iii) the liquid, which originally adhered to the outer surface of the nozzle tube and was slightly drawn in by suckback, was located at the tip of the nozzle tube. will do. In addition, the liquid at the tip of the nozzle tube may drip after being held in the nozzle tube for a long time, or solidify at the tip of the nozzle tube and remain as dirt, so there is room for improvement. there were.

An object of the present disclosure is to provide a liquid ejector capable of quickly dropping liquid remaining on the tip side of the nozzle cylinder relative to the air.

The liquid ejector of the present disclosure comprises:
a mounting member to be mounted on the container body;
a pump unit fixed to the container body by the mounting member and for pumping upward the contents in the container body;
A liquid ejector comprising a nozzle head attached to a stem erected on the pump section and configured to eject the contents pumped by the pump section to the outside,
The nozzle head has a nozzle cylinder that guides the contents from the pump section in a substantially horizontal direction,
The nozzle cylinder has a sloped portion that slopes downward toward the tip,
The inclined portion is provided with an air introduction hole communicating between a nozzle flow path formed inside the nozzle cylinder and the outside at a position spaced apart from the tip of the nozzle cylinder.

Further, in the liquid ejector of the present disclosure, in the above configuration, the outer surface of the nozzle tube is provided with a liquid guide groove extending from the air introduction hole toward the tip of the nozzle tube, and the liquid guide groove has a bottom portion of It is preferable that the groove is a bottomed groove provided radially outward of the nozzle channel.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a liquid ejector capable of quickly dropping liquid remaining on the tip side of the nozzle cylinder relative to the air.

1 is a front partial cross-sectional view of a liquid ejector that is an embodiment of the present disclosure; FIG. 1 is an enlarged front cross-sectional view of a nozzle head portion of a liquid ejector that is an embodiment of the present disclosure; FIG. Fig. 2 is a bottom view of a nozzle head portion of a liquid ejector that is an embodiment of the present disclosure;

Hereinafter, a liquid ejector 100 according to an embodiment of the present disclosure will be described in detail with reference to the drawings (FIGS. 1 to 3).

As shown in FIG. 1, the liquid ejector 100 according to the present embodiment includes a mounting member 10 mounted on the mouth of the container body C, and a mounting member 10 mounted and fixed to the container body C and housed in the container body C. a pump unit 20 for pumping upward the contents pumped by the pump unit 20; It is equipped with a nozzle head 30 for ejecting to.

In the present specification, claims, and drawings, the vertical direction means the upward direction and the downward direction when the liquid ejector 100 is mounted on the container main body C and placed in an upright position as shown in FIG. shall be Further, the left direction in FIG. 1 (the direction in which the nozzle 35 protrudes) is the front, and the right direction in FIG. 1 is the rear. Further, the radially outward direction is the direction toward the outside along a straight line that passes through the central axis O of the liquid ejector 100 in FIG. 1 and is perpendicular to the central axis O. shall mean the direction towards the axis O; However, the radial direction of the nozzle tube 35a, which will be described later, is the direction along a straight line perpendicular to the axis along the longitudinal direction of the nozzle tube 35a in FIG. 1, and the circumferential direction of the nozzle tube 35a is the direction around the axis. As shown in FIG. 1, since the nozzle tube 35a according to the present embodiment has a downwardly inclined portion 35b at the tip, the axis of the nozzle tube 35a also extends along the tip of the nozzle tube 35a. shall be slanted downwards at

In this embodiment, the container main body C is formed by subjecting a parison made of a synthetic resin material to extrusion blow molding. Low-density polyethylene (LDPE) or high-density polyethylene resin (HDPE) is used as the material constituting the container body C. In particular, when HDPE is used, it has high rigidity and excellent impact resistance. A container body C can be manufactured. However, the present invention is not limited to this embodiment. For example, when the container body C is formed by biaxial stretch blow molding, polyethylene terephthalate (PET) or the like may be used as the material constituting the container body C.

The mounting member 10 includes a tubular peripheral wall 11 , a ceiling wall 12 closing the upper end of the peripheral wall 11 , and a tubular wall 13 extending upward from the upper surface of the ceiling wall 12 . A female threaded portion is formed on the radially inner side surface of the peripheral wall 11 so as to be detachably threadedly engaged with a male threaded portion provided on the outer surface of the mouth portion of the container body C. As shown in FIG. Instead of the female threaded portion, an engaging projection projecting radially inwardly from the peripheral wall 11 may be provided so that it can be attached to the container main body C by plugging.

The outer peripheral surface of the cylinder wall 13 is formed with a male threaded portion 13a that can be screwed into a female threaded portion 32a provided on the inner peripheral surface of the outer cylinder 32 of the nozzle head 30, which will be described later. The nozzle head 30 is attached to the upper end portion of the stem 21 that is biased upward by an elastic member in the pump portion 20. By pushing down the pressing portion 34 of the nozzle head 30 against the upward bias, the pump is By operating the pump body of the portion 20, the contents in the container body C can be discharged to the outside. By screwing the female threaded portion 32a provided on the nozzle head 30 to the male threaded portion 13a of the mounting member 10, the stem 21 is held in the vicinity of the bottom dead center of the movable range against the upward bias. can be rendered inoperable and maintained in a condition suitable for storage.

The nozzle head 30 includes a pressing portion 34 for actuating the pump portion 20 when the user presses it downward, and an inner surface of a stem 21 that hangs down from the bottom surface of the pressing portion 34 and stands upward in the pump portion 20. an inner cylinder 31 to be fitted and mounted on the inner cylinder 31, an outer cylinder 32 provided concentrically on the radially outer side of the inner cylinder 31 and provided with the above-described female screw portion 32a, and an outer periphery further provided radially outwardly of the outer cylinder 32. It is provided with a wall 33 and a nozzle 35 extending forward from the outer peripheral wall 33 and guiding the contents pumped upward from the container body C to the outside. The contents pressure-fed through the inner space of the stem 21 pass through the inner cylinder 31 and are guided to the nozzle channel N in the nozzle cylinder 35 a that constitutes the nozzle 35 . The contents guided substantially horizontally forward through the nozzle channel N are ejected to the outside from the ejection hole 35c at the tip of the nozzle cylinder 35a.

In the present embodiment, the nozzle tube 35a has an inclined portion 35b that is inclined downward toward the distal direction (forward). The inclined portion 35b is provided at the tip of the nozzle cylinder 35a, and the content is ejected obliquely downward, so that the user can easily pick up and use the content.

As shown in FIGS. 2 and 3, on the lower side of the inclined portion 35b in the circumferential direction, the nozzle flow path N and the outside are vertically separated from the tip of the nozzle tube 35a in the axial direction of the nozzle tube 35a. A communicating air introduction hole 35d is provided. In this embodiment, it is assumed that the content is a low-viscosity liquid such as a mouthwash, and the air introduction hole 35d is provided as a through hole with a diameter of approximately 1 mm.

2 and 3, the outer surface of the nozzle tube 35a is provided with a liquid guide groove 35e extending from the air introduction hole 35d toward the tip of the nozzle tube 35a. The liquid guiding groove 35e is a bottomed groove having a bottom portion 35e1 (see FIG. 2) provided radially outside the nozzle flow path N. As shown in FIG. In this embodiment, the liquid guide groove 35e extends along the outer surface of the nozzle tube 35a from the air introduction hole 35d to the tip of the nozzle tube 35a.

Each member constituting the liquid ejector 100 can be made of, for example, a synthetic resin material or a metal.

When using the liquid ejector 100 having the configuration of FIG. 1, when the user presses down the pressing portion 34 of the nozzle head 30, the stem 21 of the pump portion 20 is pushed downward against the upward bias. As a result, the pump portion 20 is actuated, and the liquid contents in the container main body C are pressure-fed upward. The pumped contents pass through the inner space of the stem 21 and the inner cylinder 31 and are supplied to the nozzle channel N of the nozzle cylinder 35a extending in a substantially horizontal direction. Contents supplied into the nozzle channel N are directed obliquely downward at the inclined portion 35b provided at the tip, and then ejected to the outside from the ejection hole 35c.

When the user finishes using the contents and releases the pressing force applied to the pressing portion 34, the nozzle head 30 and the stem 21 are pushed upward by the upward biasing force of the elastic member provided in the pump portion 20. . At this time, since a negative pressure is generated in the pump section 20, the inside of the nozzle flow path N is also in a state of being negatively pressured, and the phenomenon ( suckback) occurs.

Due to the above-described suckback, the contents remaining in the nozzle tube 35a are sucked toward the pump section 20 and drawn into the root area of the nozzle tube 35a (area L1 in FIG. 2). Also, air taken in from the outside is introduced into the region of the tip of the nozzle tube 35a (region A in FIG. 2). Also, although the frequency is not high, the liquid content adhering to the outer surface of the tip of the nozzle tube 35a may be slightly pulled in by the above-described suckback and remain in the region of the tip of the nozzle tube 35a. (area L2 in FIG. 2). Even in such a case, according to the liquid ejector 100 of the present embodiment, the liquid content remaining in the region L2 of the tip portion of the nozzle cylinder 35a exists in the inclined portion 35b. try to move in the direction As a result, the area A has a slightly negative pressure, but the negative pressure draws air into the nozzle flow path N through the air introduction hole 35d to maintain the pressure at approximately atmospheric pressure. Therefore, the liquid content in the region L2 is not hindered by the negative pressure in the nozzle flow path N, moves further toward the ejection hole 35c by its own weight, and quickly drops to the outside from the ejection hole 35c.

In this embodiment, the diameter of the air introduction hole 35d is set to approximately 1 mm so that the liquid content does not easily leak out from the air introduction hole 35d. Even if the liquid content leaks out of the nozzle cylinder 35a through the air introduction hole 35d in rare cases, the liquid content will flow through the liquid guide groove 35e provided adjacent to the air introduction hole 35d to the tip of the nozzle cylinder 35a. It can be quickly guided to the part and dripped to the outside.

As described above, the present embodiment includes the mounting member 10 mounted on the container body C, the pump section 20 fixed to the container body C by the mounting member 10 and pumping the contents in the container body C upward, A liquid ejector 100 including a nozzle head 30 attached to a stem 21 erected on a pump section 20 and configured to eject the contents pumped by the pump section 20 to the outside. The nozzle cylinder 35a has a nozzle cylinder 35a that guides the contents of the container in a substantially horizontal direction. The nozzle cylinder 35a has an inclined portion 35b that inclines downward toward the tip. , an air introduction hole 35d communicating between the nozzle flow path N formed inside the nozzle tube 35a and the outside is provided at a position spaced apart from the nozzle tube 35a. By adopting such a configuration, even if the liquid content remains at the tip of the nozzle cylinder 35a, air is introduced from the air introduction hole 35d, thereby suppressing the generation of negative pressure in the nozzle flow path N. , the liquid content remaining at the tip portion can be quickly dropped to the outside from the ejection hole 35c. Therefore, after the user has finished using the liquid ejector 100, the liquid contents may drop and stain the storage place after a certain period of time has passed, or may solidify at the tip of the nozzle cylinder 35a and remain as stains. I have nothing to do. In this embodiment, for example, the content is a low-viscosity liquid such as a mouthwash, the amount of one ejection is about 3 g, and the length of the inclined portion 35b of the nozzle cylinder 35a is relatively long. is adopted, the liquid content remaining at the tip of the nozzle tube 35a can be quickly dripped.

In this embodiment, the outer surface of the nozzle tube 35a is provided with a liquid guide groove 35e extending from the air introduction hole 35d toward the tip of the nozzle tube 35a. It is configured to be a bottomed groove provided radially outward. By adopting such a configuration, even if the liquid content leaks from the air introduction hole 35d to the outside of the nozzle tube 35a, the tip of the nozzle tube 35a will flow through the liquid guide groove 35e communicating with the outer peripheral end of the air introduction hole 35d. It can be quickly guided to and dripped to the outside. In particular, by forming the liquid guide groove 35e as a bottomed groove, compared to the case where the liquid guide groove 35e is a slit that reaches the nozzle channel N, the strength of the tip portion of the nozzle cylinder 35a can be kept high. This prevents the impression that the tip of the nozzle tube 35a is cracked. In addition, it is possible to prevent the contents passing through the nozzle tube 35a from going around to the outside of the nozzle tube 35a through the liquid guide groove 35e.

Although the present disclosure has been described with reference to figures and examples, it should be noted that various variations and modifications will be readily apparent to those skilled in the art based on the present disclosure. Therefore, it should be noted that these variations 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 multiple components can be combined into one or divided. It should be understood that the scope of the present invention includes these.

For example, in the present embodiment, the air introduction hole 35d is provided on the lower side of the inclined portion 35b in the circumferential direction, but it is not limited to this aspect. 35 d of air introduction holes may be provided in the peripheral direction upper side in the inclination part 35b of the nozzle pipe|tube 35a, for example, and may be provided in the side (perpendicular|vertical direction to the paper surface of FIG. 2).

Further, in the present embodiment, the liquid guiding groove 35e is configured to extend along the outer surface of the nozzle tube 35a from the air introduction hole 35d to the tip portion of the nozzle tube 35a, but it is not limited to this aspect. The liquid guide groove 35e does not necessarily have to extend to the tip of the nozzle tube 35a, and may extend to the root side of the nozzle tube 35a beyond the air introduction hole 35d.

Further, in the present embodiment, the content is assumed to be a low-viscosity liquid such as a mouthwash, and the air introduction hole 35d is formed as a through hole having a diameter of about 1 mm, but the present invention is not limited to this aspect. Assuming that the content is a liquid having a higher viscosity than the mouthwash, the diameter of the air introduction hole 35d may be increased according to the viscosity of the content.

The present disclosure can be employed, for example, as the liquid ejector 100 related to the field of beauty and health products such as mouthwash, cosmetics such as lotion and hairdressing, and pharmaceuticals such as insect repellent.

REFERENCE SIGNS LIST 10 mounting member 11 peripheral wall 12 ceiling wall 13 cylinder wall 13a male threaded portion 20 pump portion 21 stem 30 nozzle head 31 inner cylinder 32 outer cylinder 32a female threaded portion 33 outer peripheral wall 34 pressing portion 35 nozzle 35a nozzle cylinder 35b inclined portion 35c ejection hole 35d air Introduction hole 35e Liquid guide groove 35e1 Bottom 100 Liquid ejector A, L1, L2 Area C Container body N Nozzle flow path O Central axis

Claims (2)

a mounting member to be mounted on the container body;
a pump unit fixed to the container body by the mounting member and for pumping the contents in the container body upward;
A liquid ejector comprising a nozzle head attached to a stem erected on the pump section and configured to eject the contents pumped by the pump section to the outside,
The nozzle head has a nozzle cylinder that guides the contents from the pump section in a substantially horizontal direction,
The nozzle cylinder has an inclined portion that inclines downward toward the tip,
The inclined portion is provided with an air introduction hole communicating between a nozzle flow path formed inside the nozzle cylinder and the outside at a position spaced apart from the tip of the nozzle cylinder. Ejector. A liquid guide groove extending from the air introduction hole toward the tip of the nozzle tube is provided on the outer surface of the nozzle tube, and the bottom of the liquid guide groove is provided radially outward from the nozzle flow path. 2. The liquid ejector of claim 1, which is a groove.

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