Medicine ejection device and controlling method thereof

一种喷射装置、药物的技术，应用在药物的器械、其他医疗器械、治疗用的雾化器等方向，能够解决降低喷射性能、不能喷射药物等问题，达到稳定喷射的效果

Inactive Publication Date: 2010-10-06
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, an inhaler using a conventional reservoir having a high sealing performance deteriorates the ejection performance as the inhaler continuously ejects, and sometimes the medicine cannot be ejected according to certain circumstances

Method used

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  • Medicine ejection device and controlling method thereof
  • Medicine ejection device and controlling method thereof
  • Medicine ejection device and controlling method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Figure 8A schematic sectional view of the medicine ejection device related to the first embodiment of the present invention is shown. In this embodiment, an air compressor 21 that generates compressed air is used as a pressure unit.

[0070] Compressors are mainly divided into turbo type and positive displacement type. The turbo type is mainly used when the pressure is low and a large amount of air is required. On the other hand, positive displacement is used when high pressure is required. The compressor used in this embodiment is an air pump, which is a positive displacement type and employs a diaphragm drive system that generates compressed air by moving the diaphragm up and down using motor torque. The air pump of the diaphragm drive system is relatively small, so it is suitable for inhalers that are always carried.

[0071] The compressor 21 is connected to a rubber plug 34 as a movable wall, and generates pressure to be applied to the rubber plug 34 . In oth...

Embodiment 2

[0087] Figure 12 is a schematic sectional view of the medicine ejection device according to the second embodiment after the regulator 22 has been removed from the embodiment 1.

[0088] As far as this embodiment is concerned, the pressure in the closed space behind the movable rubber plug 34, specifically the pressure in the tube 24, can be adjusted by changing the rotation speed of the air pump 21 according to the measured value of the pressure sensor 23. Control was performed in the same manner as in Example 1. The pressure can be adjusted by increasing the rotational speed of the air pump 21 when the pressure increases so that the measured value of the pressure sensor matches the set value and by decreasing the rotational speed when the pressure decreases. It can be automatically adjusted according to a control signal from a CPU provided on the control board 25 . The flow of the example using the inhaler is similar to Embodiment 1, except that the switching operation for...

Embodiment 3

[0090] Figure 13 is a schematic sectional view of a medicine ejection device according to a third embodiment, which employs an electric cylinder 41 for a pressure unit instead of an air pump. The electric cylinder 41 is a device that rotates a ball screw or the like by rotation of a built-in motor and moves a direct acting member connected to the ball screw, thereby changing the volume of the air cylinder accommodated inside. The medicine ejection device can easily detect the position due to the inclusion of an encoder and the like.

[0091]The compressed air generated by the volume change of the electric cylinder 41 is sent to the space behind the movable rubber stopper 34 in the glass container 33 . By controlling the switching of the solenoid valve 42 based on the pressure value of the pressure sensor 23 , the internal pressure of the closed space pressurizing the movable rubber plug 34 can be easily adjusted. The user returns the position of the electric cylinder 41 to ...

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PUM

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Abstract

The invention provides a medicine ejection device which provides stable ejection even when a reservoir with high sealability is used and can eject an appropriate amount of medicine. A medicine ejection portion 1 includes an ejection nozzle 1a and an element 1b which generates energy for ejecting the medicine, and is connected to a medicine storing portion 2. The medicine storing portion 2 is blocked from the outside air except a path through the ejection nozzle 1a, so that when the medicine is ejected from the ejection nozzle 1a, a pressure difference is formed between the outside and the inside of the medicine storing portion 2. A pressure unit 3 which is a feature of the present invention pressurizes a movable wall 5 when ejecting a medicine, which is displaced so that the volumetric capacity of the medicine storing portion 2 decreases due to the pressure difference.

Description

technical field [0001] The present invention relates to a medicine ejection device configured to allow a user to carry and use it, and to be used in an inhaler for causing the user to inhale medicine, and a control method thereof. Background technique [0002] An inhaler that uses the ejection principle of an inkjet system to eject microdroplets of medicine into an airflow path through which air inhaled through a mouthpiece flows and inhales the user (refer to Japanese Patent Application Laid-Open No. 2004 -290593 and Japanese Patent Application Laid-Open No. 2004-283245). The advantage of such an inhaler is the ability to precisely eject a prescribed amount of medication with a uniform particle size. [0003] The basic configuration of such a drug ejection device includes an ejection head in which an ejection energy generating element such as a heat exothermic element is arranged, and a reservoir in which a drug to be supplied to the ejection head is stored. When the rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M11/00A61M11/08
CPCA61M15/02A61M2205/3653A61M2205/3306A61M2011/042A61M2011/007A61M2015/025A61M2205/332A61M2205/3351A61M11/007A61M11/042A61M15/008A61M15/0081A61M15/025
Inventor 今井满
Owner CANON KK
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