Nozzle member

Abstract

To provide a nozzle member that can eject a liquid in a straight stream over a long distance.SOLUTION: A nozzle member 2 of an ejector 1, which is installed to a mouth of a container body, expands / shrinks a pump chamber according to operation, and ejects a liquid in the container body to the exterior through the pump chamber, has: a long flow channel R1 which extends a tip opening 4a which becomes an ejection port for ejecting the liquid in a straight stream to the exterior; and a conical projection part 4c which projects to a tip side with the tip opening 4a as an apex, and of which a diameter is gradually reduced toward the tip side. The long flow channel R1 has: a column-shaped straight flow channel R11 which extends to the tip opening 4a; and a frustum-shaped diameter reduction flow channel R12 which extends to a base end of the straight flow channel R11 while gradually reducing the diameter thereof toward the tip side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nozzle member. [Background technology]

[0002] BACKGROUND ART A nozzle member of a sprayer is known that is attached to the mouth of a container body and sprays liquid from the container body to the outside in response to operation (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-51052 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a nozzle member that can eject a liquid in a straight stream over a long distance. [Means for solving the problem]

[0005] One aspect of the present invention is as follows.

[0006] [1] A nozzle member of a sprayer that is attached to a mouth of a container body and sprays liquid from the container body to the outside in response to operation, a long flow path extending a long distance to a tip opening that serves as a jet outlet for jetting the liquid to the outside in a straight stream; and a protruding portion that protrudes from the tip opening to a tip side and gradually reduces in diameter toward the tip side, The long flow path is a nozzle member having a cylindrical straight flow path that extends a long distance to the tip opening, and a truncated cone-shaped flow path that gradually narrows in diameter toward the tip side and extends a long distance to the base end of the straight flow path.

[0007] [2] The ejector has a mating peripheral wall; the nozzle member has an ejection cylindrical portion having the long flow path, and an attachment portion that is connected to a base end of the ejection cylindrical portion and is attached by being fitted into the fitting peripheral wall, the mounting portion has an inner cylindrical portion disposed along the inner peripheral surface of the fitting peripheral wall, an outer cylindrical portion disposed along the outer peripheral surface of the fitting peripheral wall, and a connecting portion disposed along the tip end surface of the fitting peripheral wall and connecting the inner cylindrical portion and the outer cylindrical portion, an inner circumferential surface of the inner cylindrical portion defines a communication flow path that communicates with a base end opening of the long flow path; The nozzle member according to [1], wherein the nozzle member has a protective tube portion that extends from the tip end of the outer tube portion toward the tip end and covers the outer periphery of the tip end of the ejection tube portion.

[0008] [3] A sprayer that is attached to the mouth of a container body and sprays liquid inside the container body to the outside in response to operation, the sprayer having the nozzle member described in [1] or [2]. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a nozzle member that can eject a liquid in a straight stream over a long distance. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a partial cross-sectional view showing an external appearance of an ejector according to an embodiment of the present invention. [Figure 2] FIG. 2 is a partially enlarged view of FIG. [Figure 3] FIG. 3 is a cross-sectional view of the nozzle member shown in FIG. [Figure 4] FIG. 4 is an external view of the nozzle member shown in FIG. 3 as viewed from the base end side. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] In one embodiment of the present invention, as shown in FIGS. 1 to 4, a sprayer 1 has a nozzle member 2 and a sprayer body 3 to which the nozzle member 2 is attached. The sprayer 1 is attached to the mouth of a container body (not shown) and expands and contracts a pump chamber in response to operation, thereby spraying liquid from the container body to the outside through the pump chamber. In this embodiment, the sprayer 1 is a trigger type that sprays liquid in response to a pulling operation on a trigger 3c. Note that the sprayer is not limited to the trigger type, and may be configured as a push-down head type that sprays liquid in response to a pushing operation on a push-down head having the nozzle member 2. The sprayer body 3 has a fixed part 3a to which the nozzle member 2 is attached and which is fixed to the mouth, a pump chamber forming part 3b supported by the fixed part 3a and which forms the pump chamber, and a trigger 3c movably supported by the fixed part 3a by a pulling operation and which expands and contracts the pump chamber when pulled.

[0013] 2 to 4, the nozzle member 2 has a long flow path R1 that extends to a tip opening 4a, which serves as a jet outlet for jetting liquid to the outside in a straight stream, and a conical protrusion 4c that protrudes from the tip opening 4a as an apex and gradually reduces in diameter toward the tip. The long flow path R1 has a straight flow path R11 that is columnar (cylindrical in this embodiment) that extends to the tip opening 4a, and a reduced-diameter flow path R12 that is frustum-shaped (frustum-cone in this embodiment) that extends to the base end of the straight flow path R11 while gradually reducing in diameter toward the tip.

[0014] In this embodiment, the direction along the central axis O that passes through the center of the long flow path R1 and extends longitudinally is called the axial direction, the side from upstream to downstream of the long flow path R1 along the axial direction is called the tip side, and the opposite side is called the base side, the direction perpendicular to the central axis O is called the radial direction, and the direction circumferentially around the central axis O is called the circumferential direction.

[0015] In this embodiment, the straight flow path R11 has a diameter of 0.3 mm, the axial length of the straight flow path R11 is 4 mm, and the axial length of the reduced diameter flow path R12 is 5.75 mm.

[0016] The ejector main body 3 has a cylindrical fitting peripheral wall 3d centered on the central axis O, and the nozzle member 2 has an ejection cylindrical portion 4 having a long flow path R1, and an attachment portion 6 that is continuous with the base end of the ejection cylindrical portion 4 and is attached by fitting to the fitting peripheral wall 3d by engaging with a locking protrusion 5 that restricts withdrawal of the nozzle member 2. The tip end of the ejection cylindrical portion 4 has a protrusion 4c and an annular protrusion 4d provided radially outward of the protrusion 4c, and the inner circumferential surface of the annular protrusion 4d extends to the tip of the annular protrusion 4d while expanding in diameter from the base end of the outer circumferential surface of the protrusion 4c toward the tip end.

[0017] The mounting portion 6 includes an inner cylindrical portion 6a arranged along the inner circumferential surface of the mating peripheral wall 3d, an outer cylindrical portion 6b arranged along the outer circumferential surface of the mating peripheral wall 3d, and a connecting portion 6c arranged along the distal end surface of the mating peripheral wall 3d, connecting the inner cylindrical portion 6a and the outer cylindrical portion 6b. The connecting portion 6c is composed of multiple (three in this embodiment) connecting pieces 6c1 arranged at intervals in the circumferential direction. The locking protrusion 5 is arranged closer to the base end than the connecting portion 6c so as not to overlap with the connecting portion 6c when viewed in the axial direction. In this embodiment, the locking protrusion 5 is composed of three protrusions 5a corresponding to the three circumferentially spaced portions 6d of the connecting piece 6c1. In this embodiment, the locking protrusion 5 is provided on the outer circumferential surface of the inner cylindrical portion 6a. However, this is not limiting and the locking protrusion 5 may be provided on the inner circumferential surface of the mating peripheral wall 3d, the outer circumferential surface of the mating peripheral wall 3d, or the inner circumferential surface of the outer cylindrical portion 6b.

[0018] The inner peripheral surface of the inner cylindrical portion 6a defines a communicating flow path R2 that communicates with the base-end opening 4b of the long flow path R1. The ejector body 3 has an insert 3e inserted into the inner cylindrical portion 6a, and the communicating flow path R2 is defined by the inner peripheral surface of the inner cylindrical portion 6a and the outer surface of the insert 3e. In this embodiment, the inner peripheral surface of the inner cylindrical portion 6a has a cylindrical surface portion 6a1 that faces the outer peripheral surface of the insert 3e and a funnel-shaped surface portion 6a2 that extends in a funnel-like manner while narrowing in diameter from the tip of the cylindrical surface portion 6a1 to the base-end opening 4b of the long flow path R1 (in this embodiment, the base end of the narrowing-diameter flow path R12).

[0019] The nozzle member 2 has a protective cylinder portion 7 that extends from the tip of the outer cylinder portion 6b toward the tip side and covers the outer periphery of the tip of the jet cylinder portion 4. The protective cylinder portion 7 and the outer cylinder portion 6b are smoothly connected in the axial direction, and form a cylindrical shape as a whole centered on the central axis line O.

[0020] According to this embodiment, since the nozzle member 2 has the reduced diameter flow path R12, the straight flow path R11, and the protruding portion 4c, when the nozzle member 2 is formed by injection molding using an injection molding die, the injection molding die is composed of a first molding die having a pin with a straight portion that forms the straight flow path R11 and a reduced diameter portion that forms the reduced diameter flow path R12, and a second molding die having a concave surface that forms the protruding portion 4c and an insertion hole that opens to the bottom of the concave surface, the pin of the first molding die is guided by the concave surface of the second molding die to the opening of the insertion hole and inserted into the insertion hole, and the outer peripheral surface of the pin is brought into contact with the inner peripheral surface of the insertion hole and the injection molding die is clamped, thereby forming a cavity defined by the concave surface and the non-insertion portion of the pin that is not inserted into the insertion hole, and a molding step in which molten resin is poured into the cavity of the clamped injection molding die to form the nozzle member 2, thereby forming the nozzle member 2. Furthermore, since the pin has a tapered portion at the base end of the straight portion that is thicker than the straight portion, the pin is less likely to wobble during the molding process, and as a result, the long flow path R1 can be formed with high precision. Therefore, a nozzle member 2 can be realized that can spray liquid in a straight stream over a long distance using the long flow path R1.

[0021] Furthermore, in this embodiment, since the reduced-diameter flow path R12 is provided in the long flow path R1, the nozzle member 2 is likely to come off toward the tip side from the ejector main body 3 due to the pressure of the liquid applied in the reduced-diameter flow path R12 when the liquid is ejected, but since the nozzle member 2 has the attachment portion 6 and the protective tube portion 7, it can be firmly fitted to the fitting peripheral wall 3d of the ejector main body 3, thereby preventing the nozzle member 2 from coming off due to an impact caused by being dropped, etc. Furthermore, since the protective tube portion 7 covers the outer periphery of the tip of the ejection tube portion 4, it is possible to prevent the ejection tube portion 4, which has the long flow path R1, from being damaged by a collision caused by being dropped, etc.

[0022] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present invention. [Explanation of symbols]

[0023] 1 squirt 2 Nozzle member 3 Squirt body 3a Fixed part 3b Pump chamber forming section 3c Trigger 3d mating wall 3e insert 4 Spout cylinder part 4a Tip opening 4b Proximal opening 4c protrusion 4d Annular convex part 5 Locking protrusion 5a Convex part 6 Mounting part 6a Inner cylinder part 6a1 Cylindrical surface part 6a2 Funnel-shaped surface part 6b Outer cylinder 6c Connecting part 6c1 Connecting piece 6d Intermittent section 7 Protective barrel O center axis R1 Long channel R11 Straight flow path R12 Reduced diameter channel R2 connecting flow path

Claims

1. A nozzle member of a sprayer that is attached to a mouth of a container body and sprays liquid from the container body to the outside in response to operation, a long flow path extending a long distance to a tip opening that serves as a jet outlet for jetting the liquid to the outside in a straight stream; and a protruding portion that protrudes from the tip opening to a tip side and gradually reduces in diameter toward the tip side, The long flow path is a nozzle member having a cylindrical straight flow path that extends a long distance to the tip opening, and a truncated cone-shaped flow path that gradually narrows in diameter toward the tip side and extends a long distance to the base end of the straight flow path.

2. The ejector has a mating peripheral wall; the nozzle member has an ejection cylindrical portion having the long flow path, and an attachment portion that is connected to a base end of the ejection cylindrical portion and is attached by being fitted into the fitting peripheral wall, the mounting portion has an inner cylindrical portion disposed along the inner peripheral surface of the fitting peripheral wall, an outer cylindrical portion disposed along the outer peripheral surface of the fitting peripheral wall, and a connecting portion disposed along the tip end surface of the fitting peripheral wall and connecting the inner cylindrical portion and the outer cylindrical portion, an inner circumferential surface of the inner cylindrical portion defines a communication flow path that communicates with a base end opening of the long flow path; The nozzle member according to claim 1 , further comprising a protective tube portion extending from a tip end of the outer tube portion toward the tip end and covering an outer periphery of the tip end of the ejection tube portion.

3. 10. A sprayer that is attached to the mouth of a container body and sprays liquid from the container body to the outside in response to operation, the sprayer having the nozzle member according to claim 1.

Images