JPS621312B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sprayer that can spray by manually maintaining a pressurized state in a liquid storage chamber according to the amount of residual liquid in the liquid storage chamber and opening a spout valve.

In conventional aerosol sprayers, a liquid that easily vaporizes, etc. is injected into the liquid storage chamber separately from the spray liquid, and the liquid storage chamber is always kept in a high pressure state by vaporizing the liquid, and the release valve is opened. It was intended to be sprayed. As described above, a means for injecting high-pressure gas or the like into the liquid storage chamber is required, and the liquid storage chamber must be constructed in an airtight manner to prevent gas leakage. Furthermore, the discarded aerosol sprayer was at risk of exploding when incinerated due to the pressurized gas left behind.

In addition, pressurized sprayers that use a piston have a complicated structure, and each time they spray, the piston must be pressurized, which makes them difficult to operate.

The present invention solves these drawbacks and has a simple structure.
Moreover, it is an object of the present invention to provide a sprayer that is easy to spray.

Hereinafter, the sprayer of the present invention will be explained with reference to FIG. A storage chamber 1 containing a liquid L to be sprayed is formed within a cylinder 2 . The upper end of the cylinder 2 is closed by screwing a top wall 3 to the cylinder 2, and the top wall 3 is provided with an injection valve 4. The inlet of the jet valve 4 communicates with the storage chamber 1 through a conduit 5 provided through the top wall 3, and the outlet of the jet valve 4 communicates with the spray head 6.
It communicates with a nozzle 8 provided in the spray head through a passage provided in the operating rod 7 of the spray head. By pressing down the spray head 6, the spout valve 4, which is closed by the spring, is opened via the operating rod 7. Further, a cap C that covers the spray head 6 is detachably provided at the upper end of the cylinder 2.

A piston member 9 is slidably inserted into the cylinder 2, and a tubular member 10 is provided at the center of the piston member 9, projecting on both sides thereof. Two annular gaskets 11 are attached to the surface of the piston member 9 that is in contact with the inner circumferential wall of the cylinder 2 to keep the interior of the storage chamber 1 watertight. A contractible bellows 12 is provided above the piston member 9, that is, inside the housing chamber 1, and the bellows 12 is screwed to the inner circumferential wall of the piston member 9 via a connecting member 12a. Note that gas is sealed inside the bellows 12, and the bellows 12 contracts according to the pressure inside the storage chamber 1. That is, as will be described later, when the piston member 9 is pushed into the storage chamber 1, the bellows 12 is also pushed into the storage chamber, and when the internal pressure of the storage chamber 1 increases, the bellows 12 contracts and the storage chamber 1 is closed. The inside of the chamber 1 is maintained in a pressurized state. When the liquid in the storage chamber 1 is reduced by being sprayed from the nozzle 8, the bellows 12 gradually expands, and the inside of the storage chamber 1 can be maintained in a pressurized state for a considerable period of time.

An inner circumferential thread 13 is formed on the inner circumferential wall of the tubular member 10, and an operating rod 14 inserted into the tubular member 10 is formed with a thread 15 that threadably engages with the inner circumferential thread 13.
The operating rod 14 is attached to the center of an operating member 16 located outside the tubular member 10, and is attached to the center of the operating member 16.
6 is rotatably provided on the downwardly extending portion 2a of the cylinder 2. That is, the annular protrusion 17 provided above the operating member 16 is guided into an annular groove 18 formed in the inner circumferential wall of the extended lower end of the cylinder 2 and rotates.

The configuration of the sprayer is as described above, and its operation will now be explained. When spraying, the front operating member 16 is rotated to push the piston member 9 and bellows 12 into the storage chamber 1. Operation member 16
Due to the rotation, the operating rod 14 rotates without moving in the axial direction of the cylinder 2, while the tubular member 10 does not rotate because frictional force is generated due to the contact between the packing 11 of the piston member 9 and the inner circumferential wall of the cylinder 2. Therefore, the piston member 9 and the bellows 12 are pushed into the housing chamber 1 due to the threaded relationship between the inner circumferential thread 13 and the thread 15. Therefore, the pressure inside the storage chamber 1 becomes high, and the bellows 12 contracts.

Thereafter, when the spout valve 4 is opened by pressing down the spray head 6, the liquid in the storage chamber 1 is discharged through the conduit 5,
It is sprayed from a nozzle 8 via a spout valve 4. To stop spraying, it is sufficient to stop pushing down the spray head 6 and close the jet valve 4. If the liquid is sprayed for a long time, the liquid in the storage chamber 1 will decrease and the pressure will drop, so spraying will no longer be possible. In such a case, spraying becomes possible by rotating the operating member 16 again to push the piston member 9 and bellows 12 into the storage chamber 1 to create a high pressure inside the storage chamber 1. Note that the pressure within the storage chamber 1 can be maintained because the bellows 12 expands from its contracted state as the amount of stored liquid decreases.

As described above, the sprayer of the present invention has the operation member 16
The device pressurizes the liquid storage chamber by rotating the piston member 9 and bellows 12 inward to the cylinder 2, so the configuration is simple and the piston is pushed down every time the spray is performed like a pressurized sprayer. do not have to. Also, since the air compression inside the bellows 12 is used to maintain the pressurized state inside the containment chamber,
A larger amount than the compressed amount of liquid is obtained, and once pressurized it can be sprayed for a considerable period of time.

Furthermore, unlike an aerosol sprayer, there is no need to inject high-pressure gas into the liquid storage chamber, and there is no risk of explosion when incinerated after disposal.

Next, a sprayer according to a second embodiment will be explained with reference to FIG. In this embodiment, if the tubular member 10 connected to the piston member 9 through the threaded portion rotates when the operating member 16 is rotated, the piston member 9 cannot be pushed into the liquid storage chamber 1. , such inconveniences can be reliably prevented.

That is, the outer part of the piston member 9 is connected to the cylinder 2.
The extension portion 2a extends to the lower end, and a guide protrusion 19 is provided at the lower end. In the case of this embodiment, guide protrusions were provided at two locations 180° apart. Further, a guide groove 20 is provided in the inner circumferential wall of the extension portion 2a of the cylinder 2, and the guide groove 20 extends in the axial direction of the cylinder.
0. Note that the guide protrusion may be formed on the inner circumferential wall of the cylinder, and the guide groove may be formed on the piston member. The rest of the structure is the same as the embodiment shown in FIG.

Therefore, when the operating member 16 is rotated, the piston member 9 and the bellows 12 are reliably pushed into the liquid storage chamber 1 through the screw engagement between the inner circumferential thread 13 and the thread 15 without being rotated. In this case, the guide protrusion 19 provided on the piston member 9 slides within the guide groove 20 provided on the extension portion 2a of the cylinder 2, and these serve to prevent the piston member 9 from rotating.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a sprayer according to a first embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of a sprayer according to a second embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Accommodation chamber, 2...Cylinder, 4...Ejection valve, 6...Spray head, 9...Piston member, 1
0... Tubular member, 12... Bellows, 13... Inner peripheral thread, 14... Operating rod, 15... Thread, 16...
Operation member.

Claims (1)

[Claims] 1. Opening the spray valve by pressing down the spray head,
A sprayer that sprays liquid in a liquid storage chamber from a nozzle includes a cylinder that forms the liquid storage chamber, a bellow that is inserted into the cylinder and seals gas inside, and a bellow that is attached to the lower end of the bellow and has a screw thread on the inner peripheral surface. a piston member provided on the upper part of the tubular member and capable of sliding in the cylinder in a watertight manner, and a piston member rotatably provided in the downwardly extending portion of the cylinder and inserted into the tubular member. A sprayer comprising a push-up operation member provided with a push-up rod having a thread that engages with a thread in a tubular member, and a passage that communicates between an ejection valve and a storage chamber. 2. The sprayer according to claim 1, wherein a guide member that moves the piston member only in the axial direction of the cylinder is formed between the piston member and the cylinder.