JPS6026843Y2 - Manual small sprayer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a small hand-operated sprayer, and more specifically to a hand-operated vertical reciprocating pump-type compact sprayer.

Various types of sprayers have been known in the past, but the present invention has many other advantages, such as a small number of parts, a simple structure, and easy assembly, and the ability to produce good mist. The present invention proposes an excellent spray having the following characteristics.

Referring to the drawings below, the main components of the present sprayer include a main member with a cylinder, a plunger, and a spray head.

The main member 1 with a cylinder has a peripheral wall 3 extending vertically from the peripheral edge of the top wall 2 to be screwed into the mouth neck of a liquid storage container, and a hole is opened in the center of the top wall, and a guide tube 4 is inserted from the peripheral edge. A cylinder 5 having a smaller diameter than the guide tube is vertically disposed from the lower end of the guide tube.

Further, from the bottom wall 6 of the cylinder, a suction pipe fitting cylinder 7 is provided with a through hole bored in the center of the bottom wall and is vertically disposed from the periphery of the hole.

A groove 8 is provided on the inner surface of the intermediate portion of the guide cylinder 4, and an outside air introduction hole 9 is provided on the lower end thereof, and an appropriate number of spring mounting stands 10 are provided on the inner periphery of the bottom wall of the cylinder. .

Further, an engaging cylinder 12 projects from the top wall 2 and has an engaging protrusion 11 on the inner edge of its upper end, with its central axis located on an extension of the central axis of the guide cylinder 4.

The plunger 13 has a lower half that can move up and down within the cylinder, and is preferably formed of an outer cylindrical member 13a and a fitting core member 13b that is fitted and fixed therein, as shown in the illustrated example. .

A vertical groove is provided on the outer surface of the fitting core material along the generatrix direction, and the vertical groove forms a flow path 14 that communicates between the lower end surface and the upper end surface of the plunger.

The fitting core material is longer than the outer cylindrical member and has both upper and lower ends protruding in the vertical direction, and the lower part of the downwardly protruding portion can be loosely inserted into the suction pipe fitting cylindrical hole to form a suction valve. stick 1
5, a residual pressure discharge groove 16 is provided at the upper end of the valve stem, and the upper protrusion has a truncated conical upper end and a discharge valve body 17.
It's Toshide.

Elastic skirt-like parts 18 and 19 that expand downward are attached to the outer periphery of the lower end and middle part of the outer cylinder member 13a, and an elastic short tubular part 20 is attached to the outer periphery of the upper end.

The short elastic tubular portion needs to have a larger outer diameter than the elastic skirt portion.

The lower elastic skirt portion 18 is in contact with the inner wall surface of the cylinder, the upper elastic skirt portion 19 is in contact with the inner wall surface of the guide tube, and the short elastic tube portion 20 is in watertight or airtight contact with the inner wall surface of the large diameter cylinder, which will be described later. .

The spray head 21 has a circumferential wall 23 having an outer diameter smaller than the inner diameter of the engagement cylinder described above hanging from the circumference of the top wall 22, and the outer circumference of the lower end of the circumferential wall is engaged with the engagement protrusion 11 on the inner circumference of the upper end of the engagement cylinder. Possible engagement protrusion 2
4 is set aside.

A large-diameter cylinder 25 having a common central axis with the retaining cylinder 12 is provided vertically from the rear surface of the top wall.

The large diameter cylinder has a larger inner diameter than cylinder 5.

A discharge valve hole 26 is bored in the center of the inner surface of the top wall, and a discharge passage 27 is bored through the inside of the top wall from the inner part of the hole and communicates with a nozzle hole 28 bored in the upper outer surface of the peripheral wall. be.

In the illustrated example, a coil spring 29 is interposed between the bottom wall of the cylinder and the lower end surface of the outer cylinder member, so that the lower end of the plunger is inserted into the cylinder, and the upper end of the plunger is inserted into the large diameter cylinder of the spray head. Also, the lower end of the peripheral wall of the spray head is fitted into the engaging cylinder 12.

Before assembly, an O-ring 30 is fitted onto the valve stem 5 in a watertight manner.

The O-ring is capable of forced sliding, and forms a suction valve 31 when attached to and removed from the bottom wall of the cylinder, and the O-ring and the groove 16 for discharging residual pressure on the valve stem form a residual pressure discharging valve in the pump chamber. It is possible.

When the sprayer is assembled, the O-ring moves up and down together with the valve stem within the range necessary to open and close the suction valve. In the illustrated example, the upper limit of the O-ring is the coil spring 29 placed on the mounting table 10. It is determined by touching the small diameter part at the lower end.

In other words, the stopper 32 that prevents the O-ring from moving upward is located at the small diameter portion.
is formed.

In the above configuration, when the spray head 21 is pushed down, the O-ring 30 comes into watertight contact with the cylinder bottom wall and the suction valve 31 is closed, and the discharge valve formed by the discharge valve body 17 and the discharge valve hole 26 is also closed by the plunger of the spring 29. Since the pump chamber is blocked by pushing up, the pressure inside the pump chamber becomes high.Then, due to the difference in diameter between the cylinder 5 and the large diameter cylinder 25, the plunger descends relative to the spray head, opening the discharge valve, and air enters the pump chamber. In some cases, ie when the atomizer is used for the first time, high pressure air is discharged from the nozzle hole 28.

When the O-ring 30 is positioned inside the residual pressure discharge groove 16 at the lower limit of the stroke as shown in FIG. 2, the residual pressure in the pump chamber passes through the groove and is discharged into the container body 34 through the suction pipe 33. be done.

When the high pressure in the pump chamber is eliminated, the discharge valve is closed, and when the spray head is released from this state, the plunger is pushed up by the elasticity of the spring, and the valve stem 15 is also raised together.

The O-ring 30 also rises together with the valve stem and leaves the cylinder bottom wall, opening the suction valve 31, but it is prevented from rising by coming into contact with the stopper 32, and only the valve stem rises while maintaining watertight contact with the O-ring. , the state shown in FIG. 3 occurs at the upper limit of the stroke.

Since the pressure inside the pump chamber becomes negative as the plunger rises, the liquid inside the container is sucked in by opening the suction valve, and the liquid inside the pump chamber is sprayed by pressing down the next spray head.

As the liquid inside the container decreases, the inside of the container is supposed to have a negative pressure, but when the upper elastic skirt portion 19 is located inside the groove 8, air passes through the groove and further passes through the outside air introduction hole 9. Since a path for introducing outside air into the container body is formed, negative pressure is prevented.

This project has the above-mentioned structure, and the main components are only three parts: the main member with cylinder, the plunger, and the spray head, and the structure is extremely simple because it is assembled by simply attaching the spring and suction pipe to these three members. It is simple and easy to assemble, and the main components with cylinders include a peripheral wall 3 for screwing into the neck of the container body and a cylinder 5 for forming the pump.
It is convenient because the liquid in the container can be refilled while maintaining the integrity of each part of the atomizer, and the residual pressure in the pump chamber is reduced through the suction pipe at the lower stroke limit. Since the structure allows the pump to be discharged into the container, the air and liquid in the pump chamber can be quickly replaced when the sprayer is used for the first time, and the residual pressure is directed toward the bottom wall of the container. Therefore, when the residual pressure is discharged toward the inner surface of the neck of the container, water droplets may adhere to the inner wall of the neck along with the residual pressure, or bubbles may be generated on the liquid surface due to the discharge of the residual pressure. It is possible to prevent the liquid from appearing as if it is contaminated, and when the upper elastic skirt portion 19 descends and passes through the internal force of the groove 8, outside air is introduced into the groove and the lower end of the guide tube. Since an outside air introduction path into the container body is formed between the guide cylinder and the plunger through the hole 9, negative pressure does not occur inside the container body due to liquid reduction, and the outside air introduction path is used when the plunger strokes. Since it is closed when it is at the upper limit, there will be no leakage even if the sprayer falls over (while attached to the container body).

The suction valve 31 and the residual pressure discharge valve are formed by an O-ring fitted slidably on the valve stem 15 and the bottom wall of the cylinder, and the O-ring and the residual pressure discharge groove 16 in the valve stem. The valve can be opened and closed reliably, and if the O-ring wears out, it can be easily replaced, so the valve can be repaired very easily.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the sprayer of the present invention. Figure 2 is an enlarged sectional view of the main part with the plunger reaching its lower stroke limit. Figure 3 is an enlarged sectional view of the main part with the plunger reaching its upper stroke limit. be.

Claims (1)

[Scope of utility model registration request] A peripheral wall 3 to be fitted to the neck of the container body is connected from the outer peripheral edge of the top wall 2, a cylinder 5 is connected to the cylinder 5 via a guide tube 4 from the edge of an opening made in the center of the top wall, and a bottom wall at the lower end of the cylinder is connected 6. A main member 1 with a cylinder, which has an opening in the center and has a suction pipe-equipped fitting cylinder 7 hanging from the opening edge, and has an engaging cylinder 12 projecting upward from the top wall; , a plunger 13 in which the lower part of the plunger is fitted so as to be able to move up and down by being biased upward, and the upper part of the plunger stands up above the guide cylinder; A large-diameter cylinder 25 with a large inner diameter and a circumferential wall 23 hanging from the outer periphery of the top wall are fitted to the above-mentioned engagement tube so as to be movable up and down. It has a spray head 21 in which the mating protrusions 11 and 24 are engaged, and a nozzle hole 28 is bored in the upper outer surface of the peripheral wall, and the plunger has a flow path communicating between the inside of the cylinder and the inside of the large diameter cylinder. 14, and a valve rod 15 that can be loosely inserted into the fitting cylinder 7 is vertically disposed from the lower end of the plunger, and the lower part of the valve rod has an outer diameter smaller than the inner diameter of the cylinder and extends to the soil surface of the bottom wall of the cylinder. The O-ring 30 forming the suction valve 31 is fitted in a watertight and forcefully slidable manner by attaching and detaching the O-ring 30, and a residual pressure discharge valve is formed at the upper end of the valve stem with the O-ring to form a residual pressure discharge valve in the cylinder. A stopper 32 is provided at the inner bottom of the cylinder to determine the upper limit of the O-ring, and a discharge valve body 17 that stands up from the upper end of the plunger communicates with the nozzle hole on the back surface of the top wall of the spray head. A discharge valve is formed with the discharge valve hole 26 bored by the plunger, an elastic skirt portion is provided at the lower end and middle portion of the plunger, an elastic short tubular portion 20 is provided at the upper end of the plunger, and an elastic short tubular portion 20 is provided at the middle portion of the guide cylinder. and the lower end have grooves 8 and outside air introduction holes 9.
A small manual sprayer characterized by having a drilled hole.