JP2515175Y2 - Trigger sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a trigger sprayer.

"Problems to be Solved by Conventional Techniques and Inventions" A trigger type sprayer configured to spray a liquid in a container by a trigger operation is known. Conventionally, this kind of atomizer can obtain the spray only when the trigger is pulled, and continuous spray cannot be obtained even if the trigger is continuously operated quickly. In consideration of such a point, the present applicant has proposed a sprayer that can obtain a spray when pulling the trigger and when returning it (continuous application) (Japanese Patent Application No. 1-42193. A trigger type sprayer having a spray nozzle at the tip, a discharge valve, a cylinder, and a suction valve provided in order from the nozzle to the upstream side, and a piston operated by a trigger is installed in the cylinder, and the cylinder is divided. There are two cylinders, a large diameter cylinder and a small diameter cylinder. The large diameter cylinder communicates with the upstream side and the small diameter cylinder communicates with the downstream side. Both cylinders are internally linked with pistons and mechanically linked to each other. This sprayer has a structure in which the cylinders are unidirectionally connected to the downstream side via a check valve.This sprayer enables continuous spraying, but when spraying when the trigger returns, especially when the trigger is Immediately before returning, the ejected liquid becomes fog However, there is a case where the liquid is ejected as a rod-shaped liquid which has no momentum, and there is room for improvement in this respect.

The present invention has been made in view of the above points, and an object thereof is to provide an excellent trigger type sprayer capable of constantly spraying the sprayed liquid in a mist state.

[Means for Solving the Problems] A trigger having a spray nozzle at the tip, a discharge valve, a cylinder, and a suction valve provided in order from the spray nozzle to the upstream side, and a piston operated by a trigger in the cylinder. In the atomizer, the cylinder is divided into two cylinders of a large diameter and a small diameter, and the large diameter cylinder is connected to the upstream side, and
A small-diameter cylinder is made to communicate to the downstream side, pistons are incorporated in both cylinders and linked by a piston shaft, and a flow passage is formed in the piston shaft so that the two cylinders communicate with each other. A check valve is provided so that the check valve is unidirectionally connected to the downstream side, and the flow passage of the piston shaft behind the check valve and the inside of the large diameter cylinder can communicate with each other, and
A trigger type sprayer characterized in that a through hole is formed at a position where the flow passage and the inside of the large diameter cylinder cannot communicate with each other as the piston shaft retracts.

"Operation" Since it has the above-mentioned configuration, it may be used in the same manner as the conventional one, but the following operation is caused by the trigger operation.

When the trigger is pulled, the pistons in both cylinders work together, causing the large diameter cylinder to become pressurized and the small diameter cylinder to become depressurized, and the pressurized liquid in the large diameter cylinder passes through the check valve and into the small diameter cylinder. Flow into the small-diameter cylinder, and an amount of the pressurized liquid corresponding to the difference in diameter between the two cylinders flows out from the small-diameter cylinder and is ejected from the spray head through the discharge valve.

When the trigger returns, the pistons in both cylinders return together, the check valve closes, the large diameter cylinder becomes depressurized, the small diameter cylinder becomes pressurized, and the pressurized liquid in the small diameter cylinder moves from the small diameter cylinder. At the same time as the liquid flows out and is ejected from the atomizing head through the discharge valve, the liquid flows out through the suction valve into the large diameter cylinder. Also, when the amount of pressurized liquid in the small diameter cylinder becomes small and the piston shaft moves forward and the through hole provided in the shaft opens into the large diameter cylinder, the small diameter cylinder and the large diameter cylinder communicate with each other, so The inside of the cylinder is depressurized, and at this point, the ejection from the head can be stopped and the ejection of the liquid with no momentum can be deleted.

[Examples] The drawings show examples of the present invention.

In the figure, 1 is an inverted L-shaped atomizer body, 2 is a screw cylinder rotatably attached to the lower end of the atomizer body for attachment to a liquid container, and 3 is pivotally attached to the front part of the atomizer body. Trigger 4 is a spray nozzle provided at the tip of the sprayer body, 5
Is a discharge valve provided in the rear part of the atomizer body, 6 and 7 are a large diameter cylinder and a small diameter cylinder horizontally provided in the atomizer body, and 8 and 9 are installed in both cylinders and are triggered. The large-diameter piston and the small-diameter piston, 10 is a piston shaft connecting the pistons, 11 is a suction valve provided in the lower portion of the atomizer body, and 12 is a suction pipe hung from the lower end of the atomizer body. Yes, a series of liquid flow paths are formed from the suction pipe to the spray nozzle 4.

For the large diameter cylinder 6 and the small diameter cylinder 7, the former is the front side,
The latter is arranged on the horizontal coaxial line on the screw cylinder 2 as a rear side, a partition wall 13 is provided between them, and a window hole 14 with a skirt is provided in the center of the partition wall. A through hole 15 communicating with the suction valve 11 is formed in the lower surface of the end portion, and a through hole 16 communicating with the discharge valve 5 is formed in the upper surface of the front end portion of the small diameter cylinder 7. As described above, by providing the cylinders 6 and 7 horizontally, there are advantages that the moldability and the assembling efficiency are good and the manufacturing cost is low.

A nose 17 is integrally projectingly provided on the front side of the large-diameter piston 8 to mechanically link the nose 17 to the middle part of the trigger 3, and also has a large-diameter portion 18a and a small-diameter portion 18b on the inner side. The recess 18 is formed, and the base of the hollow rod 19 is fitted into the small-diameter portion 18b of the recess. The hollow rod 19 has a large-diameter portion 18a of the concave portion 18 as the main portion.
In addition to projecting in the larger diameter cylinder 6 in the axial direction, it is slidably fitted in the through hole 14 so as to be slidable in an airtight manner and in a watertight manner so as to project into the small diameter cylinder 7, while the small diameter piston 9
In this, a fitting cylinder 20 corresponding to the hollow rod 19 is provided in a protruding manner, and the fitting cylinder is fitted to the tip of the hollow rod to form the piston shaft 10 by the hollow rod and the fitting cylinder. The hollow rod 19 is provided with a passage hole 21 leading to the inside of the large diameter cylinder 6 in front of its main portion, and a passage hole 22 leading to the inside of the small diameter cylinder 7 at the rear end of the fitting cylinder 20. A flow passage 23 is formed inside, and a check valve 24 by a ball valve is internally provided in the middle of the flow passage so that the check valve 24 can flow from the large diameter cylinder side to the small diameter cylinder side. A compression spring 25 for pressing a large-diameter piston is arranged in the large-diameter cylinder 6 behind.
Further, the piston shaft 10 behind the check valve 24 is provided with a through hole 26 for communicating the flow passage 23 with the inside of the large diameter cylinder 6. The through hole 26 is configured so that the communication between the inside of the large diameter cylinder 6 and the flow passage 23 becomes impossible when the trigger 3 is pulled and the piston shaft 10 is retracted.

As described above, the screw cylinder 2 is used by being screwed to the mouth of the container containing the liquid. When the trigger 3 is pulled against the compression spring 25, the large-diameter piston 8 is actuated at the same time. The small-diameter piston 9 is driven by the piston shaft 10.
Along with this, the inside of the large-diameter cylinder 6 is set to the pressurizing state and the inside of the small-diameter cylinder 7 is set to the depressurizing state, so that the pressurized liquid in the large-diameter cylinder 6 passes through the passage hole 21, the flow passage 23, and the passage hole 22, and the small-diameter cylinder 7
The amount of the pressurized liquid flowing into the inside of the cylinder is further sprayed (sprayed) from the spray nozzle 4 through the through hole 16 and the discharge valve 5.

Next, when the trigger 3 is released, both pistons 8 and 9, the trigger 3 and the like move backward due to the elastic force of the compression spring 25, and the inside of the small diameter cylinder 7 is in the pressurizing state and the inside of the large diameter cylinder 6 is in the depressurizing state. , The check valve 24 is closed, and the pressurized liquid in the small diameter cylinder 7 is ejected (sprayed) from the spray nozzle 4 through the through hole 16 and the discharge valve 5.
To do. The liquid in the small diameter cylinder 7 is ejected and the piston shaft 10
As the cylinder moves forward, the through hole 26 provided in the piston shaft opens in the large diameter cylinder 6, and the inside of the small diameter cylinder 7 and the inside of the large diameter cylinder 6 communicate with each other, so that the inside of the small diameter cylinder 7 is depressurized. At this point, the jetting from the nozzle 4 is stopped, and the jetting of the liquid which has no momentum due to the expansion of the coil spring 25 and the reduction of the compression pressure can be eliminated.

Further, the liquid in the container is sucked into the large-diameter cylinder 6 in the depressurized state through the suction pipe 12, the suction valve 11, and the through hole 15.

[Advantage of the Invention] According to the present invention, it is possible to obtain the spray both when the trigger is pulled and when the trigger is returned. Therefore, continuous spraying is possible, which is convenient for use. Further, there is no fear that the momentum of the ejected liquid will be lost when the trigger is returned, and uniform spraying can always be performed. Furthermore, the structure is simple and can be provided at low cost.

[Brief description of drawings]

 The drawings are vertical side views showing an embodiment of the present invention. 1 ... Atomizer body, 2 ... Screw cylinder 3 ... Trigger, 4 ... Spray nozzle 5 ... Discharge valve, 6 ... Large diameter cylinder 7 ... Small diameter cylinder, 8 ... Large diameter piston 9 ... Small diameter Piston, 10 ... Piston shaft 11 ... Suction valve, 12 ... Suction pipe 24 ... Check valve, 25 ... Compression spring 26 ... Through hole

Claims (1)

(57) [Scope of utility model registration request] 1. A spray nozzle is provided at a tip, and a discharge valve, a cylinder and a suction valve are sequentially provided from the spray nozzle to an upstream side,
In a trigger type sprayer in which a piston operated by a trigger is housed in a cylinder, the cylinder is divided into two cylinders of a large diameter and a small diameter, and the large diameter cylinder is upstream and the small diameter cylinder is downstream. The pistons in the cylinders so that they are interlocked with each other, and the piston shafts are linked to each other to form a flow passage communicating between the cylinders, and a check valve is provided in the flow passages. The piston shaft behind the check valve at a position where the flow passage can communicate with the inside of the large-diameter cylinder, and when the piston shaft retracts, the flow passage and the large-diameter cylinder can communicate with each other. A trigger type sprayer, characterized in that a through hole is formed at a position where the inside cannot communicate with the inside.