JPH0366381A - In-nasal cavity fine powder atomizer - Google Patents

Abstract

PURPOSE:To obtain the in-nasal cavity fine powder atomizer of a concise constitution without using a movable type switching valve at all by forming integrally a ventilation means and suction means by a filter which powder is not allowed to pass through and gas can pass through. CONSTITUTION:A capsule C containing powder is set to a powder containing chamber 2 of an atomizer body 1, a cap 5 is fitted and installed in the outside of a front chamber 2a and a long needle 5a is pierced through the capsules C and both ends are opened. When a pump chamber 4 is pressed, air in the pump chamber flows into a ventilation chamber 3 from a filter 6. In this case, a pressure air current flows into the powder containing chamber 2, blows through from an open hole of the rear end of the capsule C to an open hole of the front end, blows out from under a blowout hole of the front end of the body 1, while rolling in powder in the capsule, and powder atomization is realized. When pressure of a compressed pump chamber 4 is stopped, air flows in from a suction hole and a blowout hole and goes to the filter 6 side together with powder, but powder contained there in is obstructed and only air passes through the filter 6 and flows into the pump chamber 4. When the pump chamber 4 is compressed again, atomization is repeated.

Description

Detailed Description of the Invention [Industrial Application Field] This invention relates to a nasal or oral fine powder sprayer, particularly a 100u11
The present invention relates to a nasal or oral fine powder atomizer suitable for use in spraying nasal medicines made of the following fine powder.

[Conventional technology]

Generally, this type of fine powder atomizer has a powder storage chamber with an ejection hole at the front and a pump chamber at the rear, and between the powder storage chamber and the pump chamber, air flows from the pump chamber to the powder storage chamber. The pump is equipped with a ventilation means for freely passing outside air, and an intake means for sucking outside air into the pump chamber, and a movable valve that can be opened only in one direction is used as the ventilation means and the intake means.

In other words, the air flow required for intake → pressurized air → ejection (spray) can be switched by using an intake valve that opens only when outside air is sucked into the pump chamber, and a vent valve that opens only when pressurized air flows from the pump chamber. It had a two-valve structure.

[Problem to be solved by the invention]

However, the above-mentioned conventional fine powder sprayer uses two movable switching valves that are complex and expensive, making the structure of the sprayer itself complicated, difficult to assemble, and expensive. .

In view of the above points, it is an object of the present invention to provide an intranasal or oral fine powder sprayer with a simple configuration that can realize powder spraying similar to conventional powder spraying without using any movable switching valve. .

[Means to solve the problem]

In order to achieve the above object, the present invention comprises a powder storage chamber with an ejection hole in the front part, a pump chamber in the rear part, and a space between the powder storage chamber and the pump chamber, from the pump chamber to the powder storage chamber. In a nasal or oral fine powder atomizer, which is provided with a ventilation means that allows airflow to pass freely through the pump chamber, and an intake means that sucks outside air into the pump chamber, the powder does not pass through the ventilation means and the intake means, but gas can pass through the ventilation means and the intake means. It is integrated with a filter and can achieve the specified intake and ventilation without using any movable valves.

〔Example〕

Hereinafter, the present invention will be described based on an embodiment shown in the accompanying drawings.

FIG. 1 is a plan view showing the overall configuration of the nasal and oral fine powder sprayer of the present invention, FIG. 2 is a front view showing its appearance, and FIG. 3 is a top view.

In the figure, 1 is the main body of the nasal and oral fine powder sprayer of the present application;
The main body 1 consists of three parts from the front: a powder storage chamber 2, a ventilation chamber 3, and a pump chamber 4, each of which is made of plastic and has a bottom shape.

The powder storage chamber 2 is for storing a predetermined fine powder to be sprayed, such as nasal medicine, and is provided with an ejection hole F at the front end and communicates with the ventilation chamber 3 at the rear end. The powder storage chamber 2 can be configured so that the powder is directly filled into the empty chamber, but in cases where cleanliness is required and the number of injections is fixed, such as for nasal drops, for example. In this case, it is desirable to adopt a configuration in which the capsule containing the powder is stored together.

That is, in this embodiment, as shown in the first diagram, the powder storage chamber 2
is configured so that it can be separated into a front chamber 2a and a rear chamber 2b and can be fitted together, and after setting the capsule C containing the powder in the rear chamber 2b, the capsule C is assembled by fitting the front chamber 2a and the rear chamber 2b. C
It can be stored with almost no space. Then, by fitting the cap 5 into the case of the front chamber 2a, the long hand 5a erected inside the cap 5 is inserted into the capsule C to allow the pressurized air in the three ventilation chambers to pass through to the nozzle F side. Pores can be punched at both ends of the capsule C.

The inner diameter of the powder storage chamber 2 has a gap (0.1 to 1.0 mm) that allows the capsule C to move, and its length is about 5 to 20% longer than the capsule C. It is configured so that it can move back and forth several millimeters by being pushed by the airflow when compressing and inhaling air. As a result, the powder inside the capsule is agitated by receiving a moderate impact as it moves, thereby promoting uniform spraying.

The ventilation chamber 3 is configured as a flow path for air moving between the powder storage chamber 2 and the pump chamber 4, and is provided with a partition wall filter 6 (ventilation and suction means) at an appropriate location to partition the compartment. The filter 6 is composed of a porous disc-shaped member (for example, sintered plastic), and is designed to not allow powder to pass through, but to allow gas to pass through. That is, for nasal medicine powder, any sintered body having pores of about 20 to 200 μm may be used. be)
. During intake, the filter 6 serves as an intake means for blocking the advance of powder and sending only outside air from the storage chamber 2 into the pump chamber 4. During spraying or misting, the filter 6 serves as an intake means for feeding only outside air from the storage chamber 2 into the pump chamber 4.
It is configured to function as a ventilation means for venting the pressurized air inside to the powder storage chamber 2.

In the above embodiment, first, the powder-filled capsule C is set in the powder storage chamber 2 of the sprayer main body 1, the cap 5 is fitted to the exterior of the front chamber 2a, and the long needle 5a is inserted into the capsule C to open both ends. make a hole Next, when the pump chamber 4 is pressed, the air in the pump chamber is compressed and flows into the ventilation chamber 3 from the filter 6. At this time, the pressurized air flow flows into the powder storage chamber 2, blows through from the opening at the rear end of the capsule C to the opening at the front end, and blows out from the jet hole F at the front end of the main body 1 while entraining the powder inside the capsule. and realizes powder spraying.

When the pressure on the compressed pump chamber 4 is stopped, air flows in from the intake hole 7 and the ejection hole F and heads toward the filter 6 together with the powder, but the powder is blocked and only the air passes through the filter 6. and flows into the pump chamber 4. Thus, by compressing the pump chamber 4 again, the above-mentioned spraying can be repeated.

〔Effect of the invention〕

As described above, the present invention includes a powder storage chamber with an ejection hole at the front and a pump chamber at the rear, and between the powder storage chamber and the pump chamber, an air flow from the pump chamber to the powder storage chamber is provided. In a nasal or oral fine powder atomizer comprising a ventilation means that allows free passage of air and an intake means that draws outside air into the pump chamber, the ventilation means and the intake means are integrated with a filter that does not allow powder to pass through but allows gas to pass through. Since it is characterized by a compact structure, it is possible to perform the intake and exhaust air necessary for spraying without using any movable valve with a complicated structure.

As a result, it is possible to provide an intranasal or oral fine powder sprayer that is simple, has few failures, and is inexpensive.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the overall configuration of the nasal and oral fine powder sprayer of the present invention, FIG. 2 is a front view showing its appearance, and FIG. 3 is a top view. 1---Nasal or oral fine powder sprayer main body 2--Powder storage chamber 2a--Anterior chamber 2b--Rear chamber 3-Vent chamber 4--Pump chamber 5--Cap 6--Filter ( Ventilation means, intake means) F...Blowout hole C・-Capsule

Claims (1)

[Claims] Equipped with a powder storage chamber with an ejection hole at the front and a pump chamber at the rear.
and a nasal or oral fine powder sprayer, which is provided between the powder storage chamber and the pump chamber, a ventilation means for freely passing the airflow from the pump chamber to the powder storage chamber, and an intake means for sucking outside air into the pump chamber. A nasal or oral fine powder atomizer, characterized in that the ventilation means and the suction means are integrated with a filter that does not allow powder to pass through but allows gas to pass through.