Nozzle member

Abstract

To provide a nozzle member capable of jetting out a liquid far in a direct current shape.SOLUTION: A nozzle member 8 is for a jetting-out device 2 mounted to a mouth 3a of a container body 3 to jet out a liquid 4 in the container body 3 to the outside in accordance with an operation. This nozzle member 8 comprises a nozzle body 8a having a long flow path 10c which extends to a tip opening 8a1 serving as an outlet 10b for jetting out the liquid 4 outside in a direct current shape. The nozzle body 8a includes a body base end surface 8a2 having a base end opening 8a3 of the long flow path 10c, and a body tip surface 8a4 having a tip opening 8a1. A projected surface 8a5 projecting to a nozzle base end side with the base end opening 8a3 as a vertex and gradually reduced in a diameter toward the nozzle base end side is formed on the body base end surface 8a2.SELECTED DRAWING: Figure 2

Description

Technical Field

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

Background Art

[0002] A nozzle member (nozzle tip) of a ejector that is attached to the mouth of a container body and ejects the liquid in the container body to the outside according to an operation is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a nozzle member capable of ejecting a liquid in a straight flow to a long distance.

Means for Solving the Problems

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

[0006] [1] A nozzle member of an ejector that is attached to the mouth of a container body and ejects the liquid in the container body to the outside according to an operation, having a nozzle body having a long flow path extending to a tip opening that serves as a jet outlet for ejecting the liquid to the outside in a straight flow, the nozzle body having a main body base end surface having a base end opening of the long flow path and a main body tip end surface having the tip opening, the nozzle member having a convex surface that protrudes toward the nozzle base end side with the base end opening as a vertex and gradually decreases in diameter toward the nozzle base end side on the main body base end surface, or having a convex surface that protrudes toward the nozzle tip end side with the tip opening as a vertex and gradually decreases in diameter toward the nozzle tip end side on the main body tip end surface.

[0007] [2] It has a mounting cylinder that extends from the base end surface of the main body towards the base end side of the nozzle and is mounted by fitting into the ejector main body. The inner peripheral surface of the mounting cylinder partitions a communication flow path that communicates with the base end opening. The nozzle member according to [1].

[0008] [3] A method for manufacturing a nozzle member by manufacturing the nozzle member according to [1] or [2] using an injection molding die, The injection molding die has a first molding die having pins for forming the long flow path, and a second molding die having a concave surface for forming the convex surface and an insertion hole opening at the bottom of the concave surface. A mold clamping step of guiding the pins of the first molding die to the opening of the insertion hole by the concave surface of the second molding die, inserting them into the insertion hole, and bringing the outer peripheral surface of the pins into contact with the inner peripheral surface of the insertion hole to clamp the injection molding die, thereby forming a cavity defined by the concave surface and the non-insertion portion of the pins that are not inserted into the insertion hole; A method for manufacturing a nozzle member, which includes a molding step of pouring molten resin into the cavity of the injection molding die clamped and molding it into the nozzle member.

[0009] [4] A cylinder, A sliding member that slides on the cylinder, A holding member having the nozzle member according to [1] or [2] and performing a lifting operation with respect to the cylinder along with the sliding member according to the operation, An ejector having an internal flow path for sending the liquid to the ejection port of the nozzle member according to the lifting operation of the holding member through a pump chamber defined by the cylinder and the sliding member and ejecting it in a direct flow.

Advantages of the Invention

[0010] According to the present invention, it is possible to provide a nozzle member capable of ejecting a liquid in a direct flow to a long distance.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be illustrated and described with reference to the drawings.

[0013] As shown in FIGS. 1 and 2, in the first embodiment of the present invention, the ejection container 1 has an ejector 2 and a container body 3 that has a mouth portion 3a, a body portion 3b, and a bottom portion connected in this order and stores a liquid 4. The ejector 2 has a base member 5 that has a cylindrical cylinder 5a1 centered on a central axis O and is attached to the mouth portion 3a, a sliding member 6 that slides on the cylinder 5a1, a biasing member 7 (spring), a nozzle member 8, and a holding member 9 that moves up and down with respect to the cylinder 5a1 along with the sliding member 6 in response to an operation that resists the upward biasing by the biasing member 7. The ejector 2 also has an internal flow path 10 that sends the liquid 4 to the ejection port 10b of the nozzle member 8 in a direct current manner in response to the up and down movement of the holding member 9 via a pump chamber 10a defined by the cylinder 5a1 and the sliding member 6. In this embodiment, the up and down direction is the direction along the central axis O, the upward direction is the direction from the cylinder 5a1 side to the nozzle member 8 side (from the bottom side of the container body 3 to the mouth portion 3a side) along the up and down direction, and the downward direction is the opposite direction. The liquid 4 is not particularly limited, but is, for example, a chemical such as a liquid fertilizer or an insecticide.

[0014] The ejector 2 has a pressure accumulation portion 11 that is provided in a portion between the pump chamber 10a and the ejection port 10b in the internal flow path 10 and accumulates the liquid 4. In this embodiment, the holding member 9 has a nozzle head 9a that has a head body 9b and a nozzle member 8 attached to the head body 9b, a stem member 9c that has a cylinder portion 9c1 and an annular wall 9c2 that extends radially inward from the upper end of the cylinder portion 9c1 and has a central opening and is attached to the head body 9b, and a piston 9d that slides on the cylinder portion 9c1 of the stem member 9c. The sliding member 6 has a toped cylindrical shape centered on the central axis O and is in sliding contact with the cylinder 5a1 at the lower end portion. The pressure accumulation portion 11 is constituted by a biasing member 7 that biases the sliding member 6 upward, an inner peripheral edge portion of the annular wall 9c2 that pushes down the upper end portion of the sliding member 6, and an upper end portion of the sliding member 6 that closes the internal flow path 10 by coming into contact with the inner peripheral edge portion of the annular wall 9c2 over the entire circumference, but is not limited thereto.

[0015] The base member 5 includes, but is not limited to, a cylinder member 5a having a cylinder 5a1, a suction pipe 5b attached to the lower end of the cylinder member 5a, and a mounting cap 5c attached to the mouth portion 3a to hold the cylinder member 5a to the mouth portion 3a.

[0016] As shown in FIGS. 1 to 3, the nozzle member 8 is a nozzle member 8 of a ejector 2 that is attached to the mouth portion 3a of the container body 3 and ejects the liquid 4 in the container body 3 to the outside according to an operation. The nozzle member 8 has a nozzle body 8a having a long flow path 10c extending to a tip opening 8a1 that serves as a jet outlet 10b for ejecting the liquid 4 linearly to the outside. The nozzle body 8a has a main body base end surface 8a2 having a base end opening 8a3 of the long flow path 10c and a main body tip surface 8a4 having the tip opening 8a1. The main body base end surface 8a2 has a convex surface 8a5 that protrudes toward the nozzle base end side with the base end opening 8a3 as a vertex and gradually decreases in diameter toward the base end opening 8a3 toward the nozzle base end side. In the present embodiment, the direction along the axis P of the nozzle member 8 is referred to as the nozzle axis direction, the side in the direction from the tip to the base end of the nozzle member 8 along the nozzle axis direction is referred to as the nozzle base end side, and the opposite side is referred to as the nozzle tip side.

[0017] According to the above configuration, since the nozzle member 8 has a thin and long long flow path 10c, the liquid 4 can be ejected linearly to a long distance. Further, since the main body base end surface 8a2 of the nozzle body 8a has the convex surface 8a5, when the nozzle member 8 is manufactured by injection molding as described later, the mold clamping process can be performed smoothly. That is, when the pin 14a forming the long flow path 10c is inserted and supported in the insertion hole 15a1 of the second mold 15, the concave surface 15a forming the convex surface 8a5 can guide the pin 14a to the opening of the insertion hole 15a1.

[0018] The nozzle member 8 has a cylindrical mounting cylinder 8b that extends from the base end face 8a2 of the main body toward the nozzle base end and is mounted by fitting into the ejector main body 12, with the axis P as the center. The inner peripheral surface of the mounting cylinder 8b partitions a communication flow path 10d that communicates with the base end opening 8a3. Note that the ejector 2 is composed of the nozzle member 8 and the ejector main body 12 to which the nozzle member 8 is mounted. According to the above configuration, by fitting the mounting cylinder 8b into the ejector main body 12, it is possible to suppress the influence on the shape of the nozzle main body 8a (the shape of the long flow path 10c) due to the fitting between the nozzle member 8 and the ejector main body 12.

[0019] The outer peripheral surface of the mounting cylinder 8b has an annular locking projection 8b1 centered on the axis P. According to the above configuration, by fitting the locking projection 8b1 into the annular groove 9b1 of the head main body 9b of the ejector main body 12, the mounting cylinder 8b can be integrally mounted to the head main body 9b.

[0020] The outer peripheral surface of the mounting cylinder 8b has an annular sealing projection 8b2 provided on the nozzle base end side of the locking projection 8b1 and centered on the axis P. According to the above configuration, by the sealing projection 8b2 being in close contact with the head main body 9b, the space between the outer peripheral surface of the mounting cylinder 8b and the head main body 9b can be sealed.

[0021] The head main body 9b has a columnar portion 9b2 that is inserted into the mounting cylinder 8b and contacts the inner peripheral surface of the mounting cylinder 8b. The outer peripheral surface of the columnar portion 9b2 has a flow path groove 10e that communicates with the communication flow path 10d. According to the above configuration, the fitting state of the mounting cylinder 8b to the head main body 9b can be maintained well by the contact between the outer peripheral surface of the columnar portion 9b2 and the inner peripheral surface of the mounting cylinder 8b.

[0022] The nozzle body 8a has a frustum shape, and the outer peripheral surface of the nozzle body 8a has a tapered shape that gradually tapers toward the nozzle tip side. The nozzle body 8a has only one long flow path 10c, and the long flow path 10c is provided on the axis P. The long flow path 10c has a circular cross-section and extends linearly and longitudinally. The convex surface 8a5 has a conical surface shape (a rotating surface obtained by rotating a linear generatrix extending obliquely from the axis P about the axis P) centered on the axis P in this embodiment. However, the present invention is not limited to this, and for example, it may be configured to have a rotating surface shape other than the conical surface shape (a multi-step conical surface shape in which the generatrix has a polygonal line shape, or a rotating surface shape in which the generatrix has a curved shape such as a convex or concave arc shape facing the outside of the nozzle body 8a). In this embodiment, the diameter of the long flow path 10c of the nozzle member 8 is 0.3 mm, the flow path length is 9 mm, the outer diameter of the nozzle body 8a is 4.5 mm at the maximum position (base end), and 2.5 mm at the minimum position (tip). By setting the diameter of the long flow path 10c to 0.5 mm or less and the flow path length to 5 mm or more, good straightness can be obtained for ejecting the liquid 4 in a straight flow to a long distance.

[0023] The nozzle member 8 can be manufactured using, for example, an injection mold 13 as shown in FIGS. 4 to 6. In the present embodiment, the injection mold 13 includes a first mold 14 having pins 14a that form a long flow path 10c, and a second mold 15 having a concave surface 15a that forms a convex surface 8a5 and an insertion hole 15a1 that opens at the bottom of the concave surface 15a. The manufacturing method of the nozzle member 8 includes guiding the pins 14a of the first mold 14 to the opening of the insertion hole 15a1 by the concave surface 15a of the second mold 15 and inserting them into the insertion hole 15a1, and bringing the outer peripheral surface of the pins 14a into contact with the inner peripheral surface of the insertion hole 15a1 to clamp the injection mold 13, thereby forming a cavity 16 partitioned by the concave surface 15a and a non-insertion portion 14a1 of the pins 14a that are not inserted into the insertion hole 15a1. The manufacturing method further includes a molding step of pouring molten resin into the cavity 16 of the clamped injection mold 13 to mold the nozzle member 8. According to the above configuration, by supporting the pins 14a on the inner peripheral surface of the insertion hole 15a1 in the molding step, it is possible to suppress deformation of the pins 14a due to the injection pressure, so that the long flow path 10c can be accurately formed. Further, in the clamping step prior to the molding step, when the first mold 14 is relatively moved so as to approach the second mold 15 in the nozzle axis direction as shown in FIG. 4 and the pins 14a are aligned with the insertion hole 15a1 as shown in FIG. 5, the concave surface 15a can guide the pins 14a. In addition, when the second mold 15 is formed so as to abut the pins 14a against the second mold 15 without providing the insertion hole 15a1 for inserting the pins 14a of the first mold 14, variations occur in the centering of the long flow path 10c.

[0024] In this embodiment, the first mold 14 includes a pin 14a that forms the long channel 10c, a tip forming surface 14b that forms the main body tip surface 8a4, a main body outer circumference forming surface 14c that forms the outer circumferential surface of the nozzle main body 8a, and a cylinder outer circumference forming surface 14d that forms the nozzle tip side with the apex of the locking protrusion 8b1 on the outer circumferential surface of the mounting cylinder 8b as a boundary. The second mold 15 includes a main body base end forming surface 15b including a concave surface 15a that forms the main body base end surface 8a2 including the convex surface 8a5, a bottomed insertion hole 15a1 that opens at the bottom of the concave surface 15a, a cylinder inner circumference forming surface 15c that forms the inner circumferential surface of the mounting cylinder 8b, a base end forming surface 15d that forms the base end surface of the mounting cylinder 8b, and an outer circumference base end forming surface 15e that forms the nozzle base end side with the apex of the locking protrusion 8b1 on the outer circumferential surface of the mounting cylinder 8b as a boundary.

[0025] In this embodiment, polyoxymethylene resin (POM) is used as the material for forming the nozzle member 8, but it is not limited to this. For example, polyolefin resins such as polypropylene (PP) and polyethylene (PE), or polyester resins such as polyethylene terephthalate (PET) may also be used.

[0026] In this embodiment, the nozzle member 8 has a convex surface 8a5 that protrudes toward the nozzle base end side with the base end opening 8a3 as the apex and gradually decreases in diameter toward the nozzle base end side on the main body base end surface 8a2. Instead of this, as in the second embodiment shown in FIG. 7, a configuration may be adopted in which the nozzle member 8 has a convex surface 8a5 that protrudes toward the nozzle tip side with the tip opening 8a1 as the apex and gradually decreases in diameter toward the nozzle tip side on the main body tip surface 8a4. In this case, since the main body tip surface 8a4 of the nozzle main body 8a has the convex surface 8a5, when the nozzle member 8 is manufactured by injection molding, the mold clamping process can be performed smoothly.

[0027] That is, when inserting and supporting the pin forming the long flow path 10c into the insertion hole of the second mold, the concave surface forming the convex surface 8a5 (the shape obtained by transferring the convex surface 8a5) can guide the pin to the opening of the insertion hole. In this case, the first mold includes a pin forming the long flow path 10c, a main body base end forming surface forming the main body base end surface 8a2, a cylinder inner peripheral forming surface forming the inner peripheral surface of the mounting cylinder 8b, a base end forming surface forming the base end surface of the mounting cylinder 8b, and an outer peripheral base end forming surface forming the nozzle base end side with the apex of the locking protrusion 8b1 on the outer peripheral surface of the mounting cylinder 8b as a boundary. The second mold includes a tip forming surface including a concave surface forming the main body tip surface 8a4 including the convex surface 8a5, a bottomed insertion hole opening at the bottom of the concave surface, a main body outer peripheral forming surface forming the outer peripheral surface of the nozzle main body 8a, and a cylinder outer peripheral forming surface forming the nozzle tip side with the apex of the locking protrusion 8b1 on the outer peripheral surface of the mounting cylinder 8b as a boundary.

[0028] 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 variously modified without departing from the gist of the present invention.

[0029] The ejector 2 of the above-described embodiment is a push-down head type pump that directly presses down the upper surface of the holding member 9 with a finger to eject the liquid 4 from the ejection port 10b of the holding member 9. However, the present invention is not limited to this. For example, a trigger swingably supported by the base member 5 may be provided, and the holding member 9 may be configured as a trigger type pump that presses down the holding member 9 in response to an operation of pulling the trigger to eject the liquid 4 from the ejection port 10b of the holding member 9, or may be configured as a trigger type pump of a form other than the above that ejects the liquid 4 from the ejection port 10b in response to an operation of pulling the trigger.

Explanation of Reference Numerals

[0030] 1 ejection container 2 ejector 3 container body 3a mouth part 3b body part 4 liquid 5 base member 5a cylinder member 5a1 cylinder 5b suction pipe 5c mounting cap 6 sliding member 7 biasing member 8 nozzle member 8a nozzle body 8a1 tip opening 8a2 body base end face 8a3 base end opening 8a4 body tip end face 8a5 convex surface 8b mounting cylinder 8b1 locking projection 8b2 sealing projection 9 holding member 9a nozzle head 9b head body 9b1 annular groove 9b2 columnar portion 9c stem member 9c1 cylinder portion 9c2 annular wall 9d piston 10 internal flow path 10a pump chamber 10b ejection port 10c long flow path 10d communication flow path 10e flow path groove 11 pressure accumulation portion 12 ejector body 13 injection molding die 14 first molding die 14a pin 14a1 non-insertion portion 14b tip forming surface 14c body outer peripheral forming surface 14d cylinder outer peripheral forming surface 15 second molding die 15a concave surface 15a1 insertion hole 15b body base end forming surface 15c cylinder inner peripheral forming surface 15d base end forming surface 15e outer peripheral base end forming surface 16 cavity O central axis P axis

Claims

1. A nozzle member of a ejector that is attached to the mouth of a container body and ejects the liquid in the container body to the outside according to an operation, The nozzle member having a nozzle body having a long flow path extending to a tip opening that serves as a jet outlet for ejecting the liquid to the outside in a direct flow, The nozzle body has a main body base end surface having a base end opening of the long flow path and a main body tip end surface having the tip opening, The nozzle member having a convex surface that protrudes toward the nozzle base end side with the base end opening as a vertex and gradually decreases in diameter toward the nozzle base end side on the main body base end surface, or a convex surface that protrudes toward the nozzle tip end side with the tip opening as a vertex and gradually decreases in diameter toward the nozzle tip end side on the main body tip end surface.

2. The nozzle member according to claim 1, further comprising a mounting cylinder that extends from the main body base end surface toward the nozzle base end side and is mounted by fitting to an ejector body, wherein an inner peripheral surface of the mounting cylinder defines a communication flow path that communicates with the base end opening.

3. A method for manufacturing a nozzle member, the method manufacturing the nozzle member according to claim 1 using an injection mold, wherein the injection mold includes a first mold having a pin that forms the long flow path, and a second mold having a concave surface that forms the convex surface and an insertion hole that opens at the bottom of the concave surface, a mold clamping step of guiding the pin of the first mold into the opening of the insertion hole by the concave surface of the second mold, inserting the pin into the insertion hole, and bringing an outer peripheral surface of the pin into contact with an inner peripheral surface of the insertion hole to clamp the injection mold, thereby forming a cavity defined by the concave surface and a non-insertion portion of the pin that is not inserted into the insertion hole; and a molding step of pouring molten resin into the cavity of the injection mold clamped in the mold clamping step to mold the nozzle member.

4. A cylinder, a sliding member that slides on the cylinder, a holding member having the nozzle member according to claim 1 and performing a lifting operation with respect to the cylinder along with the sliding member according to the operation, and an ejector having an internal flow path that sends the liquid to the jet outlet of the nozzle member according to the lifting operation of the holding member through a pump chamber defined by the cylinder and the sliding member and ejects the liquid in a direct flow.

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