JPS6026851Y2 - trigger sprayer nozzle - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a nozzle for a sprayer with a trigger set, in which the inside of the tip of the nozzle hole is enlarged in diameter and a valve member is fitted therein to form an elastic discharge valve.

Conventionally, various trigger-set sprayers are known, but when an elastic discharge valve is provided in the tip of the nozzle hole, the spray pressure does not decrease at the beginning and end of spraying, and therefore the mist becomes coarse and atomized. is never incomplete.

However, this case has the disadvantage that it is troublesome to suck in liquid when using the atomizer for the first time, that is, to discharge air from a state where air is present in the pump and draw liquid into the pump chamber.

The present invention eliminates this drawback, and will be described below with reference to the drawings. Reference numeral 1 denotes the mouth and neck of the container body, and 2 represents the main body of the sprayer with a trigger set, in which a threaded tube 3 is screwed and attached to the mouth and neck.

The sprayer body has a trigger 4, and when the trigger is pulled, the piston 5 is pushed into the cylinder 7 against the elasticity of the spring 6, and then the suction valve 8 and the elastic discharge valve 9 are closed.
Because the pump chamber and nozzle hole 1 are blocked,
When the pressure inside the pump chamber becomes high, the discharge valve 9 opens and sprays from the spray hole 11 due to the high pressure, and when the trigger approaches the pull limit, the elastic discharge valve 9 closes due to the drop in the high pressure state inside the pump chamber, and then When the trigger is released, the piston 5 is pushed out from inside the cylinder by the elasticity of the spring 6, and the trigger returns to its original position. At this time, the pressure inside the pump chamber becomes negative, so the suction valve 8 opens and the suction valve 8 opens and the piston 5 is pushed out from inside the cylinder by the elasticity of the spring 6. The liquid inside the container is sucked into the pump chamber.

The nozzle tip is constructed as follows.

That is, the inner diameter of the tip of the nozzle hole 10 is increased to form a valve member fitting chamber 22 whose stepped surface with respect to the nozzle hole, which is caused by the increase in size, serves as the valve seat 21.

Inside the fitting chamber, a discharge valve body 24 is attached to one side of the elastic deformation part 23 formed in a ring shape from the outer surface of both left and right sides of the elastic deformation part 23 via a connecting part, and a base plate part 25 is attached to the other side. The valve member 26 thus formed is fitted.

It is preferable that a protrusion protrude from the center of the outer surface of the discharge valve body to be loosely inserted into the nozzle hole.

A groove 27 is provided on the side surface and outer end surface of the substrate portion 25 to form a liquid passage.

The groove is formed in the outer end surface of the substrate so that the liquid rotates when passing through the groove and entering the spray hole, as shown in FIG.

The valve member is fitted into the valve member fitting chamber with the outer surface of the discharge valve body in contact with the valve seat 21, and a nozzle cap 28 is fitted to the nozzle tip.

The nozzle cap has a spray hole 11 at the center of the top wall 29 and has a fitting peripheral wall 30 protruding from the top wall, and the fitting peripheral wall 30 is fitted into the inner wall surface of the valve member fitting chamber as shown in FIG. Alternatively, it may be fitted onto the outer surface of the nozzle as shown in FIG.

When the nozzle cap is fitted, the outer surface of the base plate is in pressure contact with the inner surface of the top wall of the cap, and the outer surface of the discharge valve body is in contact with the valve seat 2.
1.

Further, the groove 27 and the spray hole 11 communicate with each other. The structure of the nozzle tip described above is already known, but the present invention has a small groove for discharging high-pressure air that communicates the inside of the nozzle hole 10 and the inside of the valve member fitting chamber on the outer surface of the discharge valve body of the valve member. It is characterized by having 31 perforated therein.

When the trigger 4 is pulled when the sprayer is used for the first time, the high-pressure air in the pump chamber and the nozzle hole passes through the small groove into the valve member fitting chamber, and further passes through the liquid passage and the spray hole. It is designed to be discharged outward.

The small groove has a small cross-sectional area so that the discharge valve does not lose its function as an elastic discharge valve.

The present invention has the above configuration, and since the small groove 31 is provided in the discharge valve body, when the air in the pump chamber is replaced with liquid using the sprayer for the first time, after pulling the trigger, the pulled state is held for a while. If this continues, the high-pressure air in the pump chamber will be discharged through the small groove, and if the trigger is released after the high-pressure air has been discharged, the pressure in the pump chamber will be reliably set to negative, allowing liquid to be easily sucked in.

Although the provision of the small groove theoretically reduces the pressurizing effect inside the pump chamber, in reality, the trigger operation is relatively quick, so it is possible to spray without any trouble.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a trigger set sprayer having the nozzle of the present invention, Fig. 2 is an enlarged half sectional view of the discharge valve member, Fig. 3 is a side view of the valve member as seen from the base plate side, and Fig. 4 is the same. A side view of the valve member viewed from the discharge valve body side, and FIG. 5 is a sectional view of a nozzle portion shown in another embodiment. 2...Sprayer body, 4...Trigger
9...Elastic discharge valve, 10...Nozzle hole, 21...Valve seat, 22...Valve member fitting chamber, 26... - Valve member, 31...Small groove.

Claims (1)

[Scope of utility model registration request] The inner diameter of the tip of the nozzle hole of the nozzle is increased to form a valve member fitting chamber 22 in which the step surface with the nozzle hole created by the increase in diameter serves as the valve seat 21. A valve member 2 formed by attaching a discharge valve body 24 to one of the left and right sides of the deformable part 23 and a base plate part 25 to the other side.
6 is fitted by pressing the discharge valve body against the valve seat surface, and a nozzle cap 28 having a spray hole 11 bored in the top wall at the tip of the nozzle is attached to the substrate on the inner surface of the top wall. In the nozzle of the trigger set sprayer, the discharge valve body is in pressure contact with the valve seat in the nozzle of the trigger set sprayer, which is formed by fitting the parts in pressure contact with each other and forming a liquid passage that communicates the valve member fitting chamber with the spray hole 11 along the outer surface of the base plate part. A nozzle for a sprayer with a trigger set, characterized in that a small hole 31 for discharging high-pressure air communicating between the inside of the nozzle hole and the inside of the valve member fitting chamber is bored in the pressure contact surface of the nozzle.