CN213789390U

CN213789390U - Inhalant device with auxiliary pushing structure

Info

Publication number: CN213789390U
Application number: CN202021363163.3U
Authority: CN
Inventors: 周丽娟; 蒋蓉; 温贤秀; 吕琴; 吴海燕
Original assignee: Sichuan Provincial Peoples Hospital
Current assignee: Sichuan Provincial Peoples Hospital
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-07-27
Anticipated expiration: 2030-07-13

Abstract

The utility model relates to an inhalant device field particularly, relates to an inhalant device who is provided with supplementary structure of pushing, including boosting device, boosting device is used for promoting the medicament, makes the medicament get into patient's oral cavity or nasal cavity. In the scheme of this application, through setting up the boosting device, when the patient can not independently inhale the medicament, medical personnel can push the medicament into patient's oral cavity or nasal cavity through the boosting device. In the scheme of this application, through setting up the boosting device, when the patient can not independently inhale the medicament, medical personnel can push the medicament into patient's oral cavity or nasal cavity through the boosting device.

Description

Inhalant device with auxiliary pushing structure

Technical Field

The utility model relates to an inhalant device field particularly, relates to an inhalant device who is provided with supplementary structure of pushing.

Background

The inhalant is used for treating respiratory diseases, can enable the medicine to directly act on respiratory tracts and lungs in inhalation treatment, and has the advantages of direct curative effect, quick response and less systemic adverse reaction.

At present, a common inhalant device is a pressurized metered dose inhaler which mainly comprises a shell, a suction nozzle, a medicine storage tank and a medicine spraying pipe, wherein the medicine spraying pipe is provided with a medicine spraying opening, and high-pressure aerosol is arranged in the medicine storage tank; when the medicine storage tank is used, the medicine storage tank is pressed downwards to spray out a certain amount of aerosol, the aerosol enters the medicine cavity of the shell through the medicine spraying opening in the medicine spraying pipe, a patient exhales deeply and then inhales deeply to suck the aerosol in the medicine cavity to the lung, so that medicine supply to the lung is realized, after inhalation is finished, the patient gargles, and the gargles are spitted out at the medicine washing position in the oral cavity.

In the treatment using the inhalant, the dose control is particularly important, and not only the therapeutic effect is determined, but also the excessive dose may cause extremely adverse side effects, and even serious medical accidents, so that the current inhalant devices are provided with metering valves to dose the medicine ejected at each pressing to ensure the accuracy of medicine delivery.

Although the inhaler devices with the above structure are widely used, in the actual clinical work, the utility model finds that the current inhaler devices still have serious shortcomings, such as the following:

in the use of the inhalant device, although the quantity of medicine ejected is fixed every time of pressing, the inhalant device does not show that the inhalant dose of a patient is fixed, because for weak patients, such as severe patients, elderly patients, patients with blurred consciousness, and the like, the problem that the breathing is light and the inhalation is weak is usually caused in most of the patients, so even if the inhalant device ejects the fixed quantity of aerosol, the patients can not be ensured to inhale the aerosol into the lung through one mouth; as for example children, parents and medical staff have difficulty in reliably grasping their behaviour, so that it is difficult for a child patient to grasp whether he or she has inhaled the inhaler completely, or possibly not at all, when using a current aerosol device. Current inhalant devices do not display the inhaled dose of the ejected inhalant, which presents significant therapeutic and drug dose control challenges.

Moreover, even if the medical care provider or the care provider knows that the patient has not completely inhaled the medicament, the remaining medicament cannot be actively delivered into the patient, which poses a significant difficulty in treating the patient with inhaled medicament, particularly in critically ill patients, as well as unconscious patients.

Therefore, there is a need to design an inhaler device capable of monitoring the actual inhalation volume of a patient and assisting the inhalation of the inhaler by the patient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can monitor patient's actual inhaled volume to current inhalant device can not monitor patient's actual inhaled dose not enough to can assist inhalant by the inhalant device that the patient inhales.

The embodiment of the utility model is realized like this:

an inhalant device provided with an auxiliary pushing structure comprises a boosting device, wherein the boosting device is used for pushing a medicament so that the medicament enters the oral cavity or nasal cavity of a patient. In the scheme of this application, through setting up the boosting device, when the patient can not independently inhale the medicament, medical personnel can push the medicament into patient's oral cavity or nasal cavity through the boosting device.

Preferably, the inhalant device further comprises a housing, the housing is provided with a storage part for placing the medicine storage tank and an inhalation part for the patient to inhale the medicine,

the shell also comprises a hollow cylinder body, one end of the cylinder body is provided with an opening to form the suction part, the other end of the cylinder body is provided with a through hole, the cylinder body is internally provided with a sliding component in a sliding way, the sliding component is in clearance fit or sealing fit with the side wall of the cylinder body, a medicament cavity is formed between the sliding component and the opening of the suction part,

the side wall of the cylinder body is also provided with a spraying inlet which is matched with a spraying pipe of the medicine storage tank, when the medicine storage tank is pressed, the spraying pipe sprays quantitative medicine into the medicine cavity,

the boosting device is a push rod, one end of the push rod is connected with the sliding component, the other end of the push rod penetrates through the through hole and is positioned outside the cylinder body, and the push rod is in clearance fit with the through hole.

The prior inhalant medicine storage tank is provided with a metering valve on a medicine spraying pipe, when the medicine spraying pipe is pressed, a certain amount of medicine is sprayed out by the medicine spraying pipe, in the application, the medicine spraying pipe is matched with a spraying inlet on a cylinder body, when the medicine storage tank is pressed, the spraying of the quantitative medicine is realized, in the scheme of the application, before the medicine storage tank is pressed, a sliding part is firstly arranged at one end far away from an opening of a suction part, the spraying inlet is positioned between the sliding part and the opening of the suction part, after the medicine is sprayed out, the mouth of a patient inhales the medicine in a medicine cavity, in the scheme of the application, the sliding part is in clearance fit with the side wall of the cylinder body, the clearance is used for ensuring the smooth sliding of the sliding part, under the premise that the sliding part slides smoothly, the clearance is small enough to ensure the synchronous movement with the inhalant, the sliding part slides towards the mouth of the patient, when the sliding component slides to the opening of the inhalation part, the medicine in the medicine cavity is completely inhaled by the patient, if the sliding component stays in the cylinder, the part of the inhalation between the sliding component and the position of the inhalation part opening is not inhaled by the patient; when the medicament in the medicament intracavity is not inhaled completely, or when the patient can not inhale voluntarily again, can push the medicament into the patient oral cavity through promoting the sliding part according to the patient breathing law, then make the patient oral cavity inhale, and then realize the respiratory tract and administer.

Preferably, the boosting device is a push rod, one end of the push rod is connected with the sliding part, the other end of the push rod penetrates through the through hole and is positioned outside the cylinder body, and the push rod is in clearance fit with the through hole.

Preferably, an observation window for observing the position of the sliding component is arranged on the cylinder body corresponding to the medicament cavity, and the observation window is made of transparent materials.

Preferably, the barrel body corresponding to the medicament cavity is made of transparent materials.

Preferably, the cylinder is further provided with scale marks along the sliding direction of the sliding member.

Preferably, the sliding part is provided with a protrusion, the inner wall of the cylinder is provided with a sliding groove matched with the protrusion along the sliding direction of the sliding part, and the protrusion is in sliding fit with the sliding groove.

Preferably, the number of the protrusions is at least two, and the protrusions are uniformly distributed around the circumference direction of the sliding component, and each protrusion corresponds to one sliding groove.

Preferably, a stopper for stopping the sliding member is further provided at an opening of the suction portion.

Preferably, the baffle is disposed at an end of the chute.

Preferably, a notch is further provided at an opening of the suction portion, and the notch communicates spaces on both sides of the sliding member when the sliding member slides to the notch.

Preferably, the baffle is located at an upper half of the suction opening.

Preferably, the notch is located at the lower half of the opening of the suction part.

Preferably, the sliding component is a plate, and the width of a gap between the sliding component and the inner wall of the cylinder is matched with the thickness of the sliding component, so that the sliding component cannot turn over in the cylinder.

Preferably, the cylinder is further detachably provided with a threshold switch, and when the negative pressure between the sliding member and the opening of the suction portion reaches a threshold value, the threshold switch is turned on and the sliding member moves toward the opening of the suction portion.

Preferably, the threshold value of the threshold switch is-8 kPa to-3 kPa.

As a preferable scheme, the threshold switch comprises a blocking piece and a spring, a groove is formed in the inner wall of the cylinder, the blocking piece is arranged in the groove, the spring is arranged between the groove and the blocking piece, and a slope surface is arranged on one side of the blocking piece, which deviates from the suction part.

Preferably, a side of the blocking member facing the inhalation portion is a slope. This further facilitates resetting of the slide. In the solution of the present application, the ramp on the blocking element ensures: when the blocking piece is not pressed, at least one part of the sloping surface is positioned in the groove, so that the sliding part can smoothly push the blocking piece.

Preferably, the sliding member has an initial position and a final position in the cylinder, the initial position is located at one end of the cylinder away from the suction portion, the final position is located at one end of the cylinder opening, and the threshold switch is used for braking the sliding member at the initial position.

Preferably, when the sliding member is located at the initial position, the sliding member closes the through hole.

As a preferable technical scheme, a sealing ring is further arranged on the sliding component, and when the sliding component is located at an initial position, the sealing ring is in sealing fit with the inner wall of the cylinder body on the periphery of the through hole.

The embodiment of the utility model provides a beneficial effect is:

1. in the scheme of the application, by arranging the boosting device, when a patient cannot inhale the medicament by himself, medical personnel can push the medicament into the oral cavity or the nasal cavity of the patient through the boosting device;

2. in the scheme of the application, the sliding component is matched with the side wall of the barrel body through a clearance which is used for ensuring the smooth sliding of the sliding part, the clearance is small enough to ensure the synchronous movement with the inhalant on the premise that the sliding component slides smoothly, the sliding component slides towards the mouth of the patient, when the sliding component slides to the opening of the inhalant part, the medicine in the medicine cavity is completely inhaled by the patient, and if the sliding component stays in the barrel body, the part of the inhalant between the sliding component and the position of the opening of the inhalant part is not inhaled by the patient; when the medicament in the medicament cavity is not completely inhaled or the patient can not inhale independently, the medicament can be pushed into the oral cavity of the patient by pushing the sliding component according to the breathing rule of the patient, and then the oral cavity of the patient is enabled to inhale, so that the administration of the respiratory tract is realized;

3. in the scheme, the threshold switch is arranged, so that the medicament in the medicament cavity can quickly enter the respiratory tract of a patient, the medicament supply in the deep part of the lung is realized, and the good medicament application effect is ensured; in addition, the mode also reduces the retention time of the medicament in the oral cavity of a patient, reduces the sedimentation of the medicament in the oral cavity, and further ensures the administration effect and the administration side effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of one embodiment of an inhaler device according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

figure 3 is a cross-sectional view of the barrel of an embodiment of the inhaler device of the present invention;

figure 4 is a schematic view of the construction of the inhaler device with the push rod in another position,

the following are marked in the figure: 1. a barrel; 2. a medicine storage tank; 3. a suction portion; 4. a threshold switch; 5. A protrusion; 6. a through hole; 7. a medicament chamber; 8. a spray inlet; 9. a sliding member; 10. a seal ring; 11. a push rod; 12. a blocking member; 13. a spring; 14. a groove; 15. an adjusting block; 16. an observation window; 17. a notch; 18. and a baffle plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

Embodiments, as shown in figures 1-4,

In a preferred embodiment, the inhalant device further comprises a housing, wherein a storage part for placing the medicine storage tank 2 and an inhalation part 3 for inhaling the medicine by the patient are arranged on the housing,

the shell also comprises a hollow cylinder body 1, one end of the cylinder body 1 is opened to form the suction part 3, the other end of the cylinder body is provided with a through hole 6, a sliding component 9 is arranged in the cylinder body 1 in a sliding way, the sliding component 9 is in clearance fit or sealing fit with the side wall of the cylinder body 1, a medicament cavity 7 is formed between the sliding component 9 and the opening of the suction part 3,

a spraying opening 8 is further formed in the side wall of the barrel body 1, the spraying opening 8 is matched with a spraying pipe of the medicine storage tank 2, when the medicine storage tank 2 is pressed, the spraying pipe sprays quantitative medicine into the medicine cavity 7,

the boosting device is a push rod 11, one end of the push rod 11 is connected with the sliding component 9, the other end of the push rod 11 penetrates through the through hole 6 and is positioned outside the barrel body 1, and the push rod 11 is in clearance fit with the through hole 6.

The present inhalant medicine storage tank 2 is provided with a metering valve on the medicine spraying pipe, when the medicine spraying pipe is pressed, a certain amount of medicine is sprayed out by the medicine spraying pipe, in the present application, the medicine spraying pipe is matched with the spraying port 8 on the cylinder body 1, when the medicine storage tank 2 is pressed, the spraying of the quantitative medicine is realized, in the scheme of the present application, before the medicine storage tank 2 is pressed, the sliding part 9 is firstly arranged at one end far away from the opening of the inhalation part 3, the spraying port 8 is positioned between the sliding part 9 and the opening of the inhalation part 3, after the medicine is sprayed, the mouth of a patient inhales the medicine in the medicine cavity 7, in the scheme of the present application, the sliding part 9 is in clearance fit with the side wall of the cylinder body 1, the clearance is used for ensuring the smooth sliding of the sliding part, under the premise that the sliding part 9 slides smoothly, the clearance should be small enough to ensure the synchronous movement with the inhalant, when the sliding part 9 slides towards the mouth of the patient and the sliding part 9 slides to the opening of the inhalation part 3, the medicine in the medicine cavity 7 is completely inhaled by the patient, and if the sliding part 9 stays in the cylinder body 1, the part of the inhalant between the sliding part 9 and the opening of the inhalation part 3 is not inhaled by the patient; when the medicament in the medicament chamber 7 is not inhaled completely, or when the patient can not inhale independently again, can push the medicament into the oral cavity of the patient according to the breathing law of the patient by pushing the sliding part 9, then make the oral cavity of the patient inhale, and then realize the administration of the respiratory tract.

As a preferred embodiment, the boosting device is a push rod 11, one end of the push rod 11 is connected with the sliding component 9, the other end of the push rod 11 passes through the through hole 6 and is located outside the cylinder 1, and the push rod 11 and the through hole 6 are in clearance fit. The pushing and resetting of the sliding part 9 can be realized by the push rod 11.

In a preferred embodiment, an observation window 16 for observing the position of the sliding member 9 is provided in the cylinder 1 corresponding to the drug chamber 7, and the observation window 16 is made of a transparent material.

In a preferred embodiment, the barrel 1 corresponding to the medicament cavity 7 is made of a transparent material.

In the above manner, by using the transparent material, the change in the medicine chamber 7 can be observed conveniently to further grasp the inhalation of the medicine in the medicine chamber 7 by the patient.

In a preferred embodiment, the cylinder 1 is further provided with scale marks along the sliding direction of the sliding member 9. The actual inhalation volume of the medicament can be more accurately known by the arrangement of the scale marks.

In a preferred embodiment, the sliding member 9 is provided with a protrusion 5, a sliding groove which is matched with the protrusion 5 is arranged on the inner wall of the cylinder 1 along the sliding direction of the sliding member 9, and the protrusion 5 is in sliding fit with the sliding groove.

In a preferred embodiment, the number of the protrusions 5 is at least two, and the protrusions 5 are uniformly distributed around the circumference of the sliding component 9, and each protrusion 5 is provided with a sliding slot. The provision of the projection 5 greatly facilitates smooth sliding of the sliding member 9 and prevents the sliding member 9 from rotating.

In a preferred embodiment, a baffle 18 for blocking the sliding member 9 is further provided at the opening of the suction portion 3. The slide member 9 is blocked by the shutter 18 from falling out of the opening of the suction portion 3.

In a preferred embodiment, the baffle 18 is arranged at the end of the chute.

In a preferred embodiment, a notch 17 is further provided at the opening of the suction portion 3, and when the sliding member 9 slides to the notch 17, the notch 17 communicates with spaces on both sides of the sliding member 9. When the patient inhales all inhalants, the sliding part 9 slides to the opening of the inhaling part 3 and is blocked by the baffle 18, the patient still inhales at the state of inhaling at the moment, and the gap 17 is arranged, so that the air behind the sliding part 9 can be smoothly inhaled by the patient, discomfort caused by sudden inhalation resistance increase is avoided, and meanwhile, the inhalant at the rear section can also enter the deep part of the lung.

In a preferred embodiment, the baffle 18 is located in the upper half of the opening of the suction portion 3.

In a preferred embodiment, the notch 17 is located in the lower half of the opening of the suction portion 3. Although the medicament is in an aerosol shape, the medicament still has a larger density compared with the air, so in the scheme, the notch 17 is arranged at the lower part, and when the subsequent air passes through the notch 17, the inhalant at the sliding component 9 can enter the respiratory tract or the lung of the patient together as much as possible, thereby further ensuring the accuracy of medicament supply.

In a preferred embodiment, the sliding member 9 is a plate, and the width of the gap between the sliding member 9 and the inner wall of the cylinder 1 is matched with the thickness of the sliding member 9, so that the sliding member 9 cannot turn inside the cylinder 1. In this embodiment, the sliding member 9 is a thin plate made of a light material, for example, a thin plastic plate is used as the sliding member 9 of the present application, so as to ensure smooth sliding along with the inhalation agent.

In a preferred embodiment, a threshold switch 4 is detachably provided in the cylindrical body 1, and when the negative pressure between the sliding member 9 and the opening of the suction portion 3 reaches a threshold value, the threshold switch 4 is turned on, and the sliding member 9 moves toward the opening of the suction portion 3. The threshold switch 4 is used for preventing the sliding component 9 from sliding towards the opening of the inhalation part 3, and by adopting the mode, when most patients with normal lung capacity are used, after the medicine is sprayed out of the medicine cavity 7, the patients inhale the medicine, at the moment, negative pressure is formed in the medicine cavity 7, when the negative pressure reaches the threshold negative pressure, the threshold switch 4 is opened, and under the action of the negative pressure value, the medicine in the medicine cavity 7 quickly enters the respiratory tract of the patients, so that medicine supply in the deep part of the lung is realized, and good medicine application effect is ensured; in addition, the mode also reduces the retention time of the medicament in the oral cavity of a patient, reduces the sedimentation of the medicament in the oral cavity, and further ensures the administration effect and the administration side effect.

In a preferred embodiment, the threshold value of the threshold switch 4 is-8 kPa to-3 kPa.

In a preferred embodiment, the threshold switch 4 includes a blocking member 12 and a spring 13, a groove 14 is provided on the inner wall of the cylinder 1, the blocking member 12 is disposed in the groove 14, the spring 13 is disposed between the groove 14 and the blocking member 12, and a slope is formed on a side of the blocking member 12 facing away from the inhalation portion 3. In this mode, in the state that the blocking member 12 is not pressed, a part of the blocking member 12 extends out of the inner wall of the cylinder 1, and at this time, the blocking member 9 is blocked, in the present embodiment, the elastic coefficient of the spring 13 is matched with a set threshold value, so that the patient can inhale, when the negative pressure in the medicine cavity 7 reaches the threshold value, the pressure applied to the blocking member 12 by the sliding member 9 can enable the blocking member 12 to be compressed into the groove 14, and further move towards the inhalation part 3, so as to realize medicine supply.

In a preferred embodiment, the side of the blocking element 12 facing the intake 3 is sloped. This further facilitates resetting of the slide member 9. In the solution of the present application, the ramp on the blocking element 12 ensures: when the blocking member 12 is not under pressure, at least a part of the sloping surface is located in the groove 14, which ensures that the sliding member 9 pushes the blocking member 12 smoothly.

In a preferred embodiment, an adjusting block 15 is movably arranged in the groove 14, and one end of the spring 13 is connected with the blocking member 12, and the other end is connected with the adjusting block 15. Through adjusting block 15, realize the regulation to stopping piece 12 and stretching into barrel 1 height, and then realize the regulation to threshold switch 4 threshold value.

In a preferred embodiment, the sliding member 9 has an initial position and a final position in the cylinder 1, the initial position is located at one end of the cylinder 1 away from the suction portion 3, the final position is located at one end of the cylinder 1 where the suction portion 3 is open, and the threshold switch 4 is used for braking the sliding member 9 at the initial position. In this embodiment, the threshold switch 4 is braked at the initial position of the slide member 9, and the slide member 9 is prevented from shaking when not in use.

In a preferred embodiment, when the sliding member 9 is located at the initial position, the sliding member 9 closes the through hole 6. In this way, when the patient inhales, the negative pressure is formed in the medicine chamber 7, and the problem that the sliding member 9 is difficult to move due to air leakage is avoided.

Preferably, a sealing ring 10 is further disposed on the sliding member 9, and when the sliding member 9 is located at the initial position, the sealing ring 10 is in sealing engagement with the inner wall of the cylinder 1 at the periphery of the through hole 6. Due to the arrangement of the sealing ring, the matching between the actual inspiratory negative pressure value of the patient and the threshold value of the threshold switch 4 is further ensured, and the situation that the negative pressure value in the medicament cavity 7 cannot reach the threshold value due to the fact that the external air enters the medicament cavity 7 through the through hole 6 is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a be provided with inhalant device of supplementary structure of pushing which characterized in that, includes the casing, be provided with on the casing and be used for placing the storage portion of medicine storage tank and be used for the inhalant portion that the patient inhaled the medicament, still include: the boosting device is used for pushing the medicament so that the medicament enters the oral cavity or the nasal cavity of a patient.

2. The inhalation device of claim 1, wherein said inhalation device comprises a housing and a mouthpiece

3. The inhaler device as claimed in claim 2, wherein the barrel corresponding to the medicament chamber is made of a transparent material, or an observation window for observing the position of the sliding member is provided on the barrel corresponding to the medicament chamber, and the observation window is made of a transparent material.

4. An inhaler device as claimed in claim 2 or 3, wherein graduation marks are provided on the barrel in the direction of sliding movement of the sliding member.

5. An inhaler according to claim 2 or 3, wherein a projection is provided on the slidable member, and a slide groove is provided on the inner wall of the barrel to engage with the projection in a direction in which the slidable member slides, the projection and the slide groove being in sliding engagement.

6. The inhalation device of claim 5 wherein said projections are at least two and are circumferentially spaced about said sliding member, each projection having a respective slot.

7. The inhaler device as claimed in claim 6, wherein a stopper for stopping the sliding member is further provided at the opening of the inhalation part.

8. The inhaler according to claim 7, wherein a notch is further provided at the opening of the inhalation portion, the notch communicates spaces on both sides of the sliding member when the sliding member slides to the notch, and the baffle is located at an upper half or a lower half of the opening of the inhalation portion.

9. An inhaler device as claimed in claim 2 or 3, wherein a threshold switch is removably provided on the barrel, the threshold switch being activated when the negative pressure between the sliding member and the opening of the inhalation portion reaches a threshold value, the sliding member moving towards the opening of the inhalation portion.

10. The inhaler device as claimed in claim 9, wherein the threshold switch comprises a blocking member and a spring, a groove is provided on the inner wall of the barrel, the blocking member is disposed in the groove, the spring is disposed between the groove and the blocking member, a side of the blocking member facing away from the inhalation portion is sloped, a side of the blocking member facing the inhalation portion is sloped, the sliding member has an initial position and a final position in the barrel, the initial position is at an end of the barrel away from the inhalation portion, the final position is at an end of the barrel where the inhalation portion is open, the threshold switch is used for braking the sliding member at the initial position, and when the sliding member is at the initial position, the sliding member closes the through hole.