JP3044068U - Nozzle cap for trigger type liquid ejector - Google Patents

Abstract

(57) Abstract: In injection of a trigger type liquid ejector, it is difficult to form a foam depending on the properties of the liquid in the bottle. Develop a nozzle cap that has ejection holes suitable for the properties of the contained liquid. SOLUTION: A trigger type liquid ejector encloses air in a foam-making cylinder to make bubbles when ejecting liquid from its nozzle, and several more ejection holes are formed on the front surface of the nozzle cap. By fitting and mounting the nozzle cap having the above, when the bubble-like liquid is discharged from the discharge hole, the air is once again taken in.

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a nozzle cap of a trigger type liquid ejector which is attached to the mouth and neck of a container body and takes out the liquid in the container by atomizing or foaming the liquid.

[0002]

2. Description of the Related Art There are many trigger type liquid ejectors such as Japanese Utility Model Application No. 4-76773, one example of which is shown in FIG. This is screwed to the mouth of a bottle (not shown) with a cap 2, and the cylinder 5 and its upper end are attached to the intermediate side surface of the standing cylinder 4 into which the liquid absorption cylinder 3 hanging in the bottle is fitted. The ejection tube 6 is projected forward from the injection tube 6, and the extension rod 8a of the piston 8 slidably fitted to the cylinder is engaged with the rear side of the middle of the trigger 7, which is pivotally supported 7a above the injection tube 6. The structure is such that a spring 9 is attached so as to urge the trigger and piston forward.

In such a liquid ejector, in order to eject the liquid in the form of a uniform mist or foam, the liquid and air must be mixed uniformly. Therefore, various types are used for the shape of the nozzle cap attached to the tip of the liquid ejector. For example, Japanese Utility Model Application No. 62-198132 discloses that a foam forming cylinder 32, which penetrates the inner surface of the foam forming nozzle, is arranged immediately in front of the liquid injection nozzle hole 31, and the axis of the inner surface of the foam forming nozzle is the nozzle hole. It is aligned with the axis of 31 and is close to the nozzle hole of the inner surface of the foam-forming surface. The lower peripheral surface is an uneven cylindrical surface 33, and the peripheral surface is a smooth cylindrical surface 34 that ends at the foam-forming jet. , The inner diameter of the smooth cylindrical surface is larger than the maximum inner diameter of the concavo-convex cylindrical surface "(Fig. 6).

[0004]

In such a liquid ejector, it is necessary to evenly mix a large amount of air into the liquid in order to diffuse the ejected liquid into a mist state or form a bubble. . Moreover, in order to evenly apply the atomized or foamed liquid to the surface to be ejected, it is desired to further subdivide the atomized or foamed body.

[0005]

Means for Solving the Problems The present invention provides a trigger-type device so that a mist-like or foam-like substance ejected from a liquid ejector can be evenly distributed over the entire surface to be ejected by a single trigger operation. The shape of the liquid discharge port of the spraying or foaming nozzle that is detachably fitted to the tip end of the injection cylinder of the liquid ejector is improved, and its nozzle cap is at the opening end of the injection cylinder of the liquid ejector. A cap-shaped cap with a flange that fits into the mouth of the tip is formed. A small-diameter foam-making cylinder is erected inside the cap body, and the cap-shaped body has a small-diameter foam-forming surface. A small-diameter hole is formed in the center of the cylinder, and 3 to 6 square or concave deformation holes are opened around the hole, and several air holes are formed on the surface between the foam-forming cylinder and the cap-shaped cylinder. Was established to evenly disperse the injection liquid.

The bubble discharge hole of the nozzle cap according to claim 1 has a small hole at the center of the front end face of the nozzle cap, and 3 to 4 cross sections around the small hole and within the inner diameter of the foam making tube. Has a concave bubble through hole, and when a liquid is ejected, a large amount of air is taken in from the air through hole formed on the front surface of the nozzle cap between the bubble making cylinder and the outer cylinder to promote foaming, and , The bubbles were dispersed and discharged.

The bubble discharge hole of the nozzle cap according to claim 2 has a small hole at the center of the front end surface of the nozzle cap, and 4 to 6 cross sections around the small hole and within the inner diameter of the foam making tube. Has a trapezoidal shape and has a structure in which a slanted through hole is circumferentially opened so that its upper side is located in the center direction, and a large amount of air is taken in from the air through hole at the time of liquid injection to promote foaming. In addition, the bubbles were dispersed and discharged.

The foam discharge hole of the nozzle cap according to claim 3 is opened in a state in which two peripheral holes as foam discharge holes are divided into four equal parts in the front end face of the nozzle cap and inside the inner diameter of the foam making cylinder. Further, the linear holes radially extending from the vicinity of the center of the foam-making cylinder are made to communicate with the inner diameter side peripheral hole in an intersecting shape and with the outer diameter side peripheral hole in a T shape so that the above-mentioned air communication is performed at the time of liquid ejection. A large amount of air was taken in from the holes to promote foaming, and the bubbles were dispersed and discharged.

The foam discharge hole of the nozzle cap according to claim 4 is a square hole as a foam discharge hole at the center of the front end surface of the nozzle cap, and around the square hole, and within the inner diameter of the foam-making tube. The four square holes and the triangular holes between the four square holes are circumferentially opened so that the apex angle is located in the center direction, and a large amount of air is taken in from the air through holes when the liquid is ejected. The foaming was promoted and the foam was dispersed and discharged.

[0010]

[Operation] The liquid pumped in the injection cylinder of the liquid ejector expands at the moment when it comes out from the discharge hole, and takes in air from the air introduction hole in the foaming cylinder or from the air introduction hole formed in the nozzle cap. It is shaped into a circle and is further subdivided by several openings formed in the front to reach the object to be ejected. Each bubble-like (or mist-like; hereinafter the same) fluid passing through the opening of this nozzle cap has a difference in ejection speed between its surface and the inside due to the contact resistance due to the side surface of the opening, resulting in a sectional area. Is expanded and mixed with the foam having passed through the adjacent opening, so that a more uniform foam can be obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 5 shows a trigger type liquid ejector 1, which is fitted and attached to the mouth of a bottle (not shown) with a screw cap 2, and a liquid absorbing cylinder 3 hanging in the bottle is fitted. The cylinder 5 and the injection cylinder 6 are projected forward from the upper end of the cylinder 5 on the intermediate side surface of the standing cylinder 4, and the cylinder is slid on the rear side of the middle of the trigger 7, which has a shaft 7a above the front of the cylinder 5. A spring 8b that engages with a rod 8a extending from the piston 8 to be fitted and biases the trigger and the piston forward, for example, a spring seat 7b that projects rearward of the shaft support above the trigger is provided at the tip of the leaf spring. The structure is biased downward.

By manually moving the trigger and sliding the piston 8 which engages with the trigger in the depth direction of the cylinder, the air or liquid in the cylinder is ejected through above the upper suction valve of the standing tube portion 4. It reaches the cylinder 6 and is ejected from the nozzle. Then, when the external pressure on the trigger is removed, the piston moves in the opposite direction by the biasing of the spring 9 and sucks the liquid in the bottle into the cylinder. After that, the liquid in the cylinder is ejected by the same operation. A diversion valve 21 is mounted on the upstream side of the injection hole 20 at the tip of the injection cylinder, whereby the liquid flow in the injection cylinder is divided into several parts, and further, the end surface on the inside (upstream of the liquid) side of the injection hole. It is ejected to the injection hole through the tangential direction flow path formed in the. Therefore, the liquid is ejected in a rotating state, which facilitates atomization and foaming.

The nozzle cap according to the present invention is shown in FIGS. 1 to 4. These are used by attaching them to the front part of the injection cylinder, and are intended to further promote dispersion of the foamed liquid and apply it evenly to the surface to be ejected. FIG. 1 shows a first embodiment of the nozzle cap 10, in which a flange 11 having a shape to be fitted in front of the injection port of the liquid ejector is stretched at the rear opening end thereof. Inside the cap, a foaming cylinder 13 concentric with the outer cylinder 12 is formed (hereinafter, the nozzle caps shown in FIGS. 2 to 4 have the same shape within this range, and will be described in order to avoid duplication. Is omitted, and the same reference numerals are used in principle.), And the front end face 14 has a small hole 15a as a bubble discharge hole 15 at the center thereof, and a small hole 15a around the small hole 15a, Three to four concave-shaped openings 15e are provided in the inner diameter of the cylinder 13, and several rectangular air introduction holes 16 are provided between the foaming cylinder 13 and the outer cylinder 12. It is a structure. .

FIG. 2 shows a nozzle cap 10b as a second embodiment, in which the bubble discharge hole 15 has a small hole 15b at the center of the front end face 14 of the nozzle cap, and the small hole 15b. Around the periphery and within the inner diameter of the foam-making tube 13, four to six obliquely trapezoidal through-holes 15f are circumferentially opened with their upper sides directed toward the center, and the foam-making tube 13 and the outer tube 12 are further provided. It has a structure in which several rectangular air introduction holes 16b are opened between the and.

FIG. 3 shows a nozzle cap 10 c as a third embodiment, in which the foam discharge hole 15 is the front end face 14 of the nozzle cap and has two threads inside the foaming cylinder 13. The peripheral holes 15c, 15h are opened in a quadrant, and the center of each of the peripheral holes 15c, 15h is formed by a linear hole 15i extending radially from the vicinity of the center of the foam-making cylinder 13. It is opened as a "Soil" -shaped through hole that communicates with the inner diameter side peripheral hole 15h in a cross shape and communicates with the outer diameter side peripheral hole 15c in a T shape. Several rectangular air introduction holes 16c are opened between the cylinder 12 and the cylinder 12.

FIG. 4 shows a nozzle cap 10d as a fourth embodiment, in which the foam discharge hole 15 has a square hole 15k at the center of the foam-making cylinder on the front end face 14 of the nozzle cap. Also, four similar square holes 15d are arranged at the same angle around the square hole 15k and inside the inner diameter of the foam forming tube 13, and triangular holes 15j are formed between the square holes 15d. It is opened circumferentially so that the apex angle is located in the central direction, and several rectangular air introducing holes 16d are opened between the foam making cylinder 13 and the outer shape cylinder 12.

It should be noted that it is desirable that each of the bubble discharge holes 15 is formed with a taper on its side wall so that the downstream side of the liquid becomes slightly larger.

[0018]

As described above, the four types of nozzle caps are selected according to the properties of the liquid filled in the bottle, and are fitted and used in the tip ejection port of the trigger type liquid ejector 1. The selection is made on the basis of the size or complexity of the bubble discharge hole. Usually, a liquid discharge hole that has a relatively large bubble discharge hole, for example, 10d, is used for a liquid that tends to form a foam, but a small liquid discharge hole is used for a liquid that is difficult to foam. The one having a bubble discharge hole, for example, 10c is optimum.

The bubble-like liquid ejected by the nozzle cap of FIG. 1 receives a strong resistance by the outer peripheral side wall of the ejection hole 15e when passing through the nozzle cap, and is diffused largely to the outer peripheral side to enlarge the ejection area.

In the nozzle cap of FIG. 2, since the ejection hole 15f is formed asymmetrically, the ejected foamy liquid is slightly distorted in the circumferential direction to promote foaming and increase the kneading effect. To do.

Since the nozzle cap of FIG. 3 is ejected from a narrow passage as a whole, bubbling is further developed.

The nozzle cap of FIG. 4 is used when the ejection area is limited, and is applied to foaming and liquid absorption, and relatively straight ejection is obtained.

[Brief description of the drawings]

1 shows a nozzle cap 1 according to the present invention, (a) is a front view and (b) is an AB sectional view thereof.

2A and 2B show a nozzle cap 2 according to the present invention, in which FIG. 2A is a front view and FIG. 2B is an AB sectional view thereof.

FIG. 3 shows a nozzle cap 3 according to the present invention, (a) is a front view and (b) is an AB sectional view thereof.

FIG. 4 shows a nozzle cap 4 according to the present invention, (a) is a front view and (b) is an AB sectional view thereof.

FIG. 5 is a side view of a central section showing an outline of a trigger type liquid ejector.

FIG. 6 shows a conventional example of a nozzle cap, and is a side view of a central cross section thereof.

[Explanation of symbols]

 1 Trigger Type Liquid Ejector 10 Nozzle Cap 11 Flange 12 Outer Cylinder 13 Foam Cylinder 14 Front End Surface of Nozzle Cap 15 Small Hole 16 Air Inlet Hole

Claims (4)

[Utility model registration claims] 1. A trigger in which an injection cylinder is protruded forward from the cylinder and an upper end of the cylinder on an intermediate side surface of a standing cylinder part fitted with a liquid absorption cylinder to be inserted into a bottle, and a front portion of the injection cylinder is pivotally supported above the injection cylinder. The rod part of the piston that slides into the cylinder is engaged with the rear surface of the middle side of the cylinder, and the trigger and the spring for urging the piston forward are attached to the ejection port of the liquid ejector. In the nozzle cap to be mounted, a flange is stretched at the rear opening end of the nozzle cap, a foaming cylinder concentric with the outer cylinder is formed inside the cap, and a small hole is formed at the center of the front end surface of the foaming cylinder. Around the small holes and within the inner diameter of the foam-making cylinder, 3 to 4 through-holes having a concave cross-section are formed as foam-through holes, and several foam-making cylinders and outer cylinders are provided. Trigger type liquid characterized by opening an air introduction hole with a rectangular cross section Nozzle cap for the injector. 2. A nozzle cap to be mounted on a liquid ejector according to claim 1, wherein a flange is stretched at a rear opening end of the nozzle cap, and a foam forming cylinder concentric with the outer cylinder is formed inside the cap. , A small hole as a foam discharge hole at the center of the front end face, and 4 to 6 cross sections that are trapezoidal and inclined around the small hole and inside the inner diameter of the foam-making cylinder. A nozzle cap characterized in that the through hole is circumferentially opened so that the upper side thereof is located in the center direction, and several rectangular air introducing holes are also provided between the foam-making cylinder and the outer cylinder. . 3. A nozzle cap to be mounted on a liquid ejector according to claim 1, wherein a flange is stretched at a rear opening end of the nozzle cap to form a foam discharge hole in the front end surface and in the inner diameter of the foam-making cylinder. The two-row peripheral hole is divided into four equal parts, and a linear hole extending radially from the vicinity of the center of the foam-making cylinder intersects with the inner-diameter side peripheral hole, and on the outer-diameter side peripheral hole. T
A nozzle cap characterized by being opened as a "soil" -shaped through hole communicating in a letter shape, and a plurality of rectangular air introducing holes being opened between the foam-making cylinder and the outer shape cylinder. 4. A nozzle cap to be mounted on a liquid ejector according to claim 1, wherein a flange is stretched at a rear opening end of the nozzle cap, and a square hole serving as a bubble discharge hole is formed at the center of the front end surface, Around the square hole and four square holes in the inner diameter of the foam forming cylinder, and triangular holes are circumferentially opened between the four square holes so that the apex angle is located in the central direction. A nozzle cap characterized in that several rectangular air introduction holes are formed between the foam-making cylinder and the outer cylinder.