JPH0366382A - Naso-oral fine powder sprayer - Google Patents

Abstract

PURPOSE:To obtain the in-nasal cavity fine powder atomizer of a concise constitution by forming a ventilation means and a suction means by a movable valve which in opened only toward a powder containing chamber, and a pin hole provided in a pump chamber, respectively, and executing both suction and pressure air feed by only using one piece of changeover valve. CONSTITUTION:A suction hole 7 consists of a simple open hole, and it is a pin hole provided on a suitable place in a pump chamber 4. A capsule C containing powder is set to a powder containing chamber 2 of an atomizer 1, a cap 5 is fitted and installed and a long needle 5a is pierced through the capsule C. when the pump chamber 4 is pressed, a pressure air current moves a valve body B until it abuts on ribs, R, R of a stopper S, passes through a clearance of the side of the ribs R, R from a clearance of a communicating passage 3a, flows into the powder containing chamber 2 from an inlet I, blows out from a blowout hole F, while rolling in fine powder in the capsule, and powder atomization is realized. When pressure of the compressed pump chamber 4 is stopped, air flows in from the suction hole 7 and the blowout hole F, moves the valve body B and closes up an outlet, therefore, it does not flow into the pump chamber 4, and accordingly, it is not feared that fine powder is fed into the pump chamber 4, and only from the suction hole 7, air flows into the pump chamber 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fine powder atomizer, particularly an intranasal or intraoral fine powder atomizer suitable for use in spraying nasal medicines made of fine powder of 100μ or less. be.

[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-part structure.

[Problem to be solved by the invention]

However, the conventional fine powder atomizer described above uses two movable switching valves which are complicated in structure and expensive, so the structure of the atomizer itself has to be complicated and expensive.

In view of the above points, it is an object of the present invention to provide a naso-oral fine powder sprayer with a simple configuration that can perform air intake and pressurized air and achieve spraying by using only one movable switching valve.

[Means to solve the problem]

In order to achieve the above object, the nasal and oral fine powder sprayer of the present invention is provided with a powder storage chamber with an ejection hole at the front, a pump chamber at the rear, and a pump between the powder storage chamber and the pump chamber. In the powder sprayer, the ventilation means is provided with a ventilation means for freely passing airflow from the chamber to the powder storage chamber, and an intake means for sucking outside air into the pump chamber, wherein the ventilation means opens only toward the powder storage chamber. It is a movable valve, and the suction means is a pinhole provided at a suitable position in the pump chamber, so that a predetermined suction can be achieved without using a movable valve as the suction means.

(Example) The present invention will be described below based on an example shown in the accompanying drawings.

Fig. 1 is a cross-sectional view showing the main parts of the fine powder atomizer of the present application, Fig. 2 is a cross-sectional view of an example using a spherical valve body, Fig. 3 is a cross-sectional view showing the configuration of the powder storage chamber, and Fig. 4 2 is an explanatory diagram of an example in which the pump chamber is attached with an intake slit provided in the threaded portion.

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 molded from plastic.

The powder storage chamber 2 is for storing a predetermined fine powder (usually average length = 100 μm or less) that is to be sprayed, such as nasal medicine, and is equipped with an ejection hole F at the front end, and communicates with the ventilation chamber 3 at the rear end. ing. The powder storage chamber 2 can be constructed so that the fine powder is directly filled into the empty chamber, but in cases where cleanliness is required and the amount of spraying 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 fine powder is stored together.

That is, in this embodiment, as shown in the third 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 fine powder in the rear chamber 2b, the front chamber 2a and the rear chamber 2b are fitted. It can be stored in Capsule C with almost no space.

By fitting the cap 5 into the front chamber 2a, the long hand 5a erected inside the cap 5 is connected to the capsule C.
It is possible to make ventilation holes at both ends of the capsule C through which the pressure air from the ventilation chamber 3 side passes through to the nozzle F side.

The diameter of the powder storage chamber 2 is almost the same as that of the capsule C, but the length is about 5 to 20% longer. is configured to advance. As a result, the powder inside the capsule is agitated by receiving a moderate impact as it moves, making it possible to achieve uniform spraying.

The ventilation chamber 3 is for freely passing only the pressurized air flow sent from the pump chamber 4 to the powder storage chamber 2 side, and includes a cylindrical communication path 3a that communicates the pump chamber 4 and the powder storage chamber 2. It is equipped with a movable valve 6 (venting means). That is, a movable valve 6 that can be opened only by the pressurized air flow toward the powder storage chamber 2 side is provided near the inlet I where the pressurized air flow from the pump chamber 4 reaches the flow path 3a. It is constructed so that it can be occluded against. (Figure 1).

Here, the movable valve 6 can have various forms, for example,
A valve may be used in which a disc-shaped valve body is hinged at a suitable position on the outer periphery so that it can be opened in only one direction.

In this embodiment, in order to simplify the structure, the movable valve 6 is constructed by fitting a disc-shaped valve body B whose diameter is slightly smaller than the inner diameter of the communication passage 3a near the inlet (2). That is, when the pump chamber 4 is brought into the suction state, the valve body B is sucked toward the pump chamber 4 side and blocks the inlet I, and when the pump chamber 4 is brought into the pressurized state, it is pushed by the pressurized air flow and flows toward the powder storage chamber 2 side. It is configured so that it can be moved to open the entrance I. The gap between the valve body B and the communication path 3a may be such that the valve body B, which acts as a resistance body to some extent during pressure and suction, moves, but does not block the progress of airflow, for example, from 0.5 to approximately It is around 1.0 mm (varies depending on the weight and material of the valve body, etc.).

The shape of the valve body B depends on the configuration of the communication passage 3a, but it may be any shape that can airtightly seal the outlet and is easy to set. For example, it may be spherical as shown in the second figure. good.

S is a stopper, and this stopper portion is connected to the outlet D (
It is provided in the communication section between the ventilation chamber 3 and the powder storage chamber 2), and is designed to stop the valve body B that has been moved by the pressure air flow without interfering with the progress of the pressure air flow. The stopper S has a pair of ribs R1R erected from the outlet to the inlet I side, and stops the valve body B at the front surface of the ribs R, and allows pressurized air to freely vent from the side. It is configured.

Reference numeral 7 denotes an intake hole (intake means), and the intake hole 7 is for taking in outside air (air) into the pump chamber 4, and is provided with a pinhole ( The inner diameter is approximately -0.1 to 1.0 mm).

Here, in the conventional sprayer, the intake hole during bombing was configured to be closed by a movable valve, whereas the intake hole 7 of the sprayer of the present invention is a simple open hole without an airflow regulating means such as a movable valve. It has become. In other words, the cross-sectional area of the intake hole 7 of the sprayer of the present invention is extremely small, and it consists of a pinhole from which only a small amount of air can leak depending on the instantaneous air pressure during spraying. It is configured to enable exhaust braking. Therefore, the intake hole 7 may be a pinhole provided at an appropriate position in the pump chamber 4, as in the embodiments shown in the first and second figures, or may be a screw hole in the pump chamber 4, which is configured in a screw-in type. Notch K in part N
(Fig. 4) may be used.

In the above embodiment, first, a powder-filled capsule C is set in the powder storage chamber 2 of the sprayer 1, the cap 5 is fitted, and the long needle 5a is pierced into the capsule C.

Next, when the pump chamber 4 is pressed, the air in the pump chamber is compressed and flows into the communication passage 3a from the outlet.

At this time, the pressurized air flow moves the valve body B until it comes into contact with the lip R2R of the stopper S, and also passes from the gap between the valve body B and the communication path 3a, through the side gap between the ribs R, R, and from the inlet I. It flows into the body storage chamber 2. Then, it 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 fine powder inside the capsule, thereby realizing powder spraying. That is, if spraying is performed with the nozzle F at the tip of the powder chamber 2 inserted into the nasal cavity or oral cavity,
Finely powdered drugs can be sprayed directly onto the diseased area.

When the pressure on the compressed pump chamber 4 is stopped, air flows in from the intake hole 7 and the jet hole F, but the air from the jet hole F moves the valve body B and blocks the outlet.
It does not flow into the pump chamber 4, and therefore there is no risk of sending fine powder into the pump chamber 4. Therefore, air flows into the pump chamber 4 only from the intake hole 7.

〔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 the nasal or oral cavity fine powder atomizer, which is provided with a ventilation means for free passage and an intake means for sucking outside air into the pump chamber, the ventilation means is a movable valve that opens only toward the powder storage chamber, and the Since the suction means is a pinhole located at a suitable location in the pump chamber, the suction and exhaust necessary for fine powder spraying can be performed by using only one movable valve with a complicated structure. .

As a result, it is possible to provide a powder sprayer that is simple, has few failures, and is inexpensive.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing the main parts of the fine powder atomizer of the present application, Fig. 2 is a cross-sectional view of an example using a spherical valve body, Fig. 3 is a cross-sectional view showing the configuration of the powder storage chamber, and Fig. 4 This is an explanatory diagram of an example in which the pump chamber is attached by providing an intake slit in the screw. 1 - Sprayer main body 2 - Powder storage chamber 2a - Front chamber 2b - Rear chamber 3 - Ventilation chamber 3a - Communication passage 4 - Pump chamber 5 - Cap 6 -・Movable valve (ventilation means) 7.--Intake hole (pinhole) F...Ejection hole C--~Capsule B-Valve body■--Population D--Outlet S--Stopper R--Rib N...Threaded part K--Notch (intake slit)

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. The nasal and oral fine powder sprayer is characterized in that the ventilation means is a movable valve that opens only toward the powder storage chamber, and the suction means is a pinhole provided at an appropriate position in the pump chamber. .