CN111135403A - Capsule type dry powder inhaler - Google Patents
Capsule type dry powder inhaler Download PDFInfo
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- CN111135403A CN111135403A CN201811299301.3A CN201811299301A CN111135403A CN 111135403 A CN111135403 A CN 111135403A CN 201811299301 A CN201811299301 A CN 201811299301A CN 111135403 A CN111135403 A CN 111135403A
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- suction nozzle
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M15/00—Inhalators
- A61M15/0001—Details of inhalators; Constructional features thereof
- A61M15/0021—Mouthpieces therefor
- A61M15/0025—Mouthpieces therefor with caps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M15/00—Inhalators
- A61M15/0028—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up
- A61M15/003—Inhalators using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up using capsules, e.g. to be perforated or broken-up
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Abstract
The invention relates to a capsule type dry powder inhaler, belonging to the field of medical instruments. Aiming at the technical problems of complex operation and pollution risk existing in the use of a commercially available product, the dry powder inhaler is improved, the suction nozzle is provided with the protrusion, the closing element on the cover cap is contacted with the protrusion in the opening process of the cover cap, the maximum friction force generated can simultaneously open the suction nozzle, and the cover cap and the suction nozzle can be opened in one step. In addition, the suction nozzle hinge seat of the suction nozzle is provided with the limiting mechanism to limit the opening angle of the suction nozzle, so that the suction nozzle and the cover cap can be automatically separated. The invention not only simplifies the operation, but also avoids the pollution possibility caused by improper use.
Description
Technical Field
The invention belongs to the field of medical instruments, and relates to a capsule type dry powder inhaler.
Background
At present, pulmonary inhalation administration is the best treatment mode for treating pulmonary diseases such as asthma, chronic obstructive pneumonia and the like, and the market is huge because the pulmonary inhalation administration is further expanded to treat systemic diseases such as diabetes and the like in recent years. And the traditional administration modes are as follows: compared with injection, oral administration, external application and the like, the pulmonary inhalation administration has unique advantages, mainly comprising: (1) the surface area of the lung is large, and the adult pulmonary alveolus surface area can reach 140 square meters; (2) the alveolar wall is very thin, and a large number of capillary vessels are densely distributed around the alveolar wall; (3) the activity of biological metabolic enzyme in the lung is low; (4) the tolerance of the patient to the medicine is good; (5) no first pass effect of liver, small dosage, quick action, and low adverse side effect; (6) is suitable for biological macromolecule transfer and the like. In contrast, pulmonary delivery requires the dispersion, aerosolization, and pulmonary delivery of the drug to be accomplished with a specific delivery device that plays a critical role in the pulmonary delivery system.
To date, there are three main types of pulmonary inhalation delivery devices: nebulizers (Nebulizer, NEB), Pressurized Metered Dose inhalers (pMDI), Dry Powder inhalers (Dry Powder Inhaler, DPI). The NEB atomizes the medicine into tiny particles by means of jet flow, ultrasound and the like, and the medicine enters the respiratory tract and the lung to be deposited by means of breathing and inhaling of a patient, so that the aim of painless and rapid treatment is fulfilled. However, the NEB has a large volume, is mostly suitable for hospital treatment, and is not suitable for carrying about. The pMDI is suitable for the treatment of various bronchial asthma, and has the advantages of small volume, portability, repeated dosing, no need of regular disinfection and the like, but the pMDI has high requirements on the operating technology of patients, and needs the proper matching of medicine ejection and patient inhalation, and the operation process of young children and old people is difficult to master, so that the defects of low medicine pulmonary delivery efficiency, poor treatment effect and the like are caused. Moreover, the conventional pMDI takes Freon as a propellant, so that the atmospheric layer is easily damaged to cause pollution. Although the improved application of hydrofluoroalkane as propellant is environmentally friendly and has no damage to the atmospheric ozone layer, it still brings about greenhouse effect. DPI is a propellant-free micronized aerosol inhaler, which is a formulation in which the micronized drug or carrier is stored in capsules, vesicles, or multi-dose reservoirs, and actively inhaled by the patient using a specially designed dry powder inhalation device. Because the device does not need a propellant, the dispersion of the drug is initiated by the inspiratory airflow of a patient, the device has no synergistic effect, and the biomacromolecule drug has the characteristics of higher stability, convenience, no pollution and the like in a dry powder state and is gradually becoming the mainstream of a pulmonary inhalation drug delivery device.
Existing DPIs can be divided into three major categories: the first type: powder medicament inhaler of the reservoir type, which has a reservoir for a dose of powder, and a dosing member for separating the dose of powder from the reservoir on each actuation, the separated powder being then inhaled into the patient via a discharge conduit. The second type: a multi-dose powder medicine inhaler, wherein powder is independently stored in advance in blisters on a blister strip, the blisters are evenly distributed on the blister strip, and the blister strip is installed on a rotating disk in the powder medicine inhaler; each actuation of the powder medicine inhaler causes a blister to be opened and the powder to be inhaled into the patient through the discharge tube. In the third category: a single-dose type powder medicine inhaler, wherein powder is separately stored in a single capsule in advance, the capsule is distributed on a capsule plate, a patient firstly takes out the capsule from the capsule plate when using the powder medicine inhaler, then the taken-out capsule is put into a capsule cavity of the powder medicine inhaler, the capsule is punctured by pressing a button, and the powder is inhaled into the body of the patient through a discharge pipe.
In the existing DPI, the problem of the single dose capsule type dry powder inhaler being too complicated to operate compared to other inhalers, such as the commercial products
After we have decomposed the whole dry powder inhalation process in detail, a total of 10 steps are required to complete the drug inhalation. The method comprises the following steps: 1) taking out the suction device; 2) pressing the operating mechanism to separate the cover from the lower shell; 3) opening the cover; 4) opening the suction nozzle; 5) putting the capsule into the capsule cavity; 6) pulling out the suction nozzle from the cover cap and clamping the suction nozzle on the plate; 7) pressing the operating mechanism to make the pricking pin puncture the capsule; 8) inhaling the medicinal powder; 9) removing the empty capsule; 10) cleaning and closing the cover.
Chinese patent document CN1874817A realizes one-step opening by designing a multifunctional operating mechanism and an elastic element, but this design also brings more complicated problems while improving operation, firstly, the design of the multifunctional operating mechanism is more complicated, and the difficulty in production is increased; secondly, associating the mouthpiece with the operating mechanism so that, including for the purpose of piercing the capsule, the mouthpiece is opened by simply pressing the operating mechanism, so that with the inhaler, the capsule needs to be pierced with the mouthpiece open, which undoubtedly increases the risk of contamination of the medicament; finally, because the force for releasing the cover cap and the suction nozzle is small, the elastic element is introduced, so that when the suction nozzle is clamped on the plate, the elastic element is always in a compressed state, on one hand, the air tightness between the suction nozzle and the plate is influenced, and on the other hand, the suction nozzle can be bounced off by the elastic element at any time as long as the clamping buckle is abraded. It is also disclosed in this patent that the opening of the suction nozzle by designing the squeezable operating window or designing the multi-function operating mechanism in two pieces, the above problems cannot be avoided as well, and the simultaneous opening of the cover and the suction nozzle cannot be really achieved.
Furthermore, we investigated commercially available products
A minor drawback is also found after the operation of use, in a sixth step the suction nozzle needs to be pulled out of the cover and then snapped onto the plate. Not only is the operation complicated and inconvenient for the use of the patient, but also the possibility of inadvertently polluting the screen is undoubtedly existed in the pulling-out process.
Disclosure of Invention
The invention solves the technical problem that the existing single-dose capsule type dry powder inhaler is improved, so that the operation is more convenient and sanitary.
To solve the above technical problems, the present invention provides a single-dose capsule type dry powder inhaler, which comprises: the capsule comprises a cover cap, a suction nozzle, a plate with a capsule cavity fixed below, an operating mechanism with a puncture needle and a lower shell; the cover cap, the suction nozzle, the plate and the lower shell are connected through a unique shaft, the top of the capsule cavity is opened on the plate, the cover cap is provided with a closing element and locked by the closing element to cover the suction nozzle in a closing position, the suction nozzle in the closing position is locked on the plate and covers the top of the capsule cavity on the plate, and the plate is locked on the lower shell; the opening track of the cover after the cover is unlocked is superposed with the outline of the suction nozzle in the closed position, so that the cover is in contact with the suction nozzle in the opening process to carry the suction nozzle to be opened synchronously.
Preferably, the cover cap is in only rubbing contact with the suction nozzle in the closed position during the opening process, and a maximum frictional force generated when the cover cap is in contact with the suction nozzle in the closed position is greater than a latching force of the suction nozzle with the plate and is less than a latching force of the plate with the lower case.
Preferably, the cover, the suction nozzle, the plate member and the lower case are connected by a hinge pin.
Preferably, the mouthpiece in the closed position is latched by means of a first lug on a first recess of the plate element, and the plate element is latched by means of a second lug on a second recess of the lower shell.
Preferably, the opening trajectory of the cover after the cover is unlocked coincides with a side of the upper end of the suction nozzle in the closed position away from the hinge pin.
Preferably, after the cover is unlocked, the opening track of the end of the cover far away from the hinge pin is overlapped with the outline of the suction nozzle in the closed position.
Preferably, the closing element is a protrusion provided at an end of the cover remote from the hinge pin, the cover is latched to a groove at an end of the plate remote from the hinge pin by the closing element, and after the cover is unlatched, an opening trajectory of the closing element coincides with the suction nozzle portion in the closed position.
Preferably, a protrusion is arranged on one side of the upper end of the suction nozzle far away from the hinge pin, and the opening track of the cover after the cover is unlocked is superposed with the protrusion of the suction nozzle in the closed position. It is further preferred that the closing element is a projection provided at an end of the cover remote from the hinge pin, the cover latches a recess of an end of the plate remote from the hinge pin by means of the closing element, and the opening trajectory of the closing element coincides with the projection of the suction nozzle in the closed position after the cover is unlatched.
On the other hand, in order to solve the technical problems of complex operation and possible pollution caused by the fact that the suction nozzle needs to be pulled out of the cover cap and locked on the plate in the operation of the existing single-dose capsule type dry powder inhaler, in a preferable scheme of the invention, a limiting mechanism is arranged at the joint of the suction nozzle and the hinge pin, so that the suction nozzle is enabled to be connected with the hinge pinMaximum opening angle β of mouth2Less than the maximum opening angle β of the cover1Separating the cap from the spout by a difference in opening angle further preferred wherein the cap has a maximum opening angle β1Maximum opening angle β to the suction nozzle2Is larger than the angle α between the cover and the nozzle when the opening trajectory of the closing element is in contact with said nozzle in the closed position, so that the nozzle is automatically separated from the cover in a sprung manner.
Compared with the prior art, the technical scheme of the invention has the following advantages:
firstly, aiming at the technical problems that the operation is complicated because the opening of the cover cap and the suction nozzle is carried out step by step when the existing single-dose capsule type dry powder inhaler is used, the invention realizes the one-step opening of the cover cap and the suction nozzle, and simplifies the operation. And the adopted technical scheme is simple, and similar problems in the prior art can not be brought.
Secondly, aiming at the technical problems that the operation is complicated and the pollution is possible due to the fact that the suction nozzle is pulled out of the cover cap and locked on the plate in the operation of the existing single-dose capsule type dry powder inhaler, the suction nozzle and the cover cap are automatically separated in a flicking mode on the basis of not influencing the operation of adding the capsule into the capsule cavity, and the operation of pulling the suction nozzle out of the cover cap in the requirement of a commercially available product is omitted. Not only simplifies the operation, but also avoids the risk of polluting the screen.
Drawings
For a better understanding of the invention, it is explained in detail below with the aid of the drawing. In the drawings:
FIG. 1 is a perspective view showing a capsule type dry powder inhaler of the present invention;
FIG. 2 is an exploded view showing a capsule type dry powder inhaler of the present invention, illustrating the structure of each part of the present invention, and the location where the interaction of each part occurs;
FIG. 3 is a schematic view showing a suction nozzle part of a capsule type dry powder inhaler of the present invention, including a top view (upper) and a front view (lower);
FIG. 4 is a perspective view showing a capsule type dry powder inhaler of the present invention, which specifically includes a state diagram before use (4a), a state diagram before use (4b) in which a cap is in contact with a suction nozzle; and (4) a state diagram in which the cover and the suction nozzle are opened.
Detailed Description
The following detailed description is provided in connection with specific embodiments, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-2, a capsule type dry powder inhaler according to an embodiment of the present invention includes: the cap 1, the suction nozzle 2, the plate 3 with the capsule cavity 13 fixed below, the operating mechanism 4 with the puncture needle 10 and the lower shell 5, wherein the cap 1, the suction nozzle 2, the plate 3 and the lower shell 5 are connected through a hinge pin 9, the top of the capsule cavity 13 is opened on the plate 3, the cap 1 is provided with a closing element 6 and locked through the closing element 6 to cover the suction nozzle 2 in a closed position, the suction nozzle 2 in the closed position is locked on a first groove 11b of the plate 3 through a first convex nose 11a and covers the top of the capsule cavity 13 on the plate 3, and the plate 3 is locked on a second groove 12b of the lower shell 5 through a second convex nose 12 a; see fig. 4a-4c, where the opening trajectory after the cover 1 is released from the latch coincides with the contour of the suction nozzle 2 in the closed position, so that the cover 1 is in contact with the suction nozzle 2 during opening for carrying the suction nozzle 2 open synchronously.
In the present embodiment, the cover 1, the suction nozzle 2, the plate 3, and the lower case 5 are connected in a single shaft form by the hinge pin 9, so that the cover 1, the suction nozzle 2, the plate 3, and the lower case 5 can be rotationally moved about the hinge pin 9. In the prior art, e.g. commercially available products
The whole using process of the medicine box needs ten steps including two steps of opening the cover 1 and then opening the suction nozzle 2 to complete the medicine administration. In the embodiment, the movement tracks of the opening cover cap 1 and the opening suction nozzle 2 are both the tracks rotating by taking the hinge pin 9 as an axis, the cover cap 1 is designed to contact the suction nozzle 2 in the opening process, and the suction nozzle 2 is carried to be opened synchronously by the interaction force generated when the cover cap 1 contacts the suction nozzle 2, so that the cover cap 1 is opened and the suction nozzle 2 is opened synchronouslyThe two steps of opening the suction nozzle 2 can be completed synchronously, so that the operation of the capsule type dry powder inhaler is more convenient. Furthermore, the way in which the cover 1 and the suction nozzle 2 are in contact and the type of interaction force generated are not limiting to the solution of the present embodiment to the respective technical problems, for example friction forces generated during rubbing or thrust forces generated by baffles and catches are feasible.
Although the mouthpiece 2 in the closed position is latched in this embodiment by means of a first lug 11a on a first recess 11b of the plate 3, the plate 3 is latched by means of a second lug 12a on a second recess 12b of the lower housing 5. In fact, how the suction nozzle 2 in the closed position is snapped onto the plate 3 and how the plate 3 is snapped onto the lower shell 5 can be achieved by other alternatives or simple modifications known to those skilled in the art, without limiting the solution of the present embodiment to solve the corresponding technical problems.
In a preferred embodiment, as shown in fig. 4b-4c, the cover 1 is in only wiping contact with the suction nozzle 2 in the closed position, and the maximum friction force generated during the contact is greater than the latching force of the suction nozzle 2 with the plate 3 and less than the latching force of the plate 3 with the lower shell 5, so that the suction nozzle 2 is also opened while the cover 1 is opened, and the plate 3 is not separated from the lower shell 5 by an improper operation when the cover is opened.
In the present embodiment, the cover cap 1 and the suction nozzle 2 in the closed position only make a rubbing contact, so that the friction force generated during the contact is utilized to realize the technical solution of the present embodiment. When the external force is gradually increased but the cover cap 1 and the suction nozzle 2 are kept relatively static, the friction force is increased along with the increase of the external force, the increase of the friction force can only reach a certain maximum value, and when the external force is larger than the maximum value, the cover cap 1 and the suction nozzle 2 can slide relatively from the relative static state. The wiping contact of the cover 1 and the suction nozzle 2 does not normally limit the range of movement of the cover 1 and the suction nozzle 2, i.e. when the user exerts an external force on the cover 1 which is greater than the maximum friction between the cover 1 and the suction nozzle 2, see fig. 4b-4c, the cover 1 and the suction nozzle 2 are brought from the relatively rest state in fig. 4b into a relative sliding movement to the state shown in fig. 4 c.
In another preferred embodiment, as shown in fig. 4b, the opening trajectory of the cover 1 after the unlatching coincides with the side of the upper end of the suction nozzle 2 in the closed position facing away from the hinge pin 9.
In this embodiment, the side of the upper end of the suction nozzle 2 remote from the hinge pin 9 is farthest away from the hinge pin 9, so it is relatively easy to design the suction nozzle 2 so that the part coincides with the opening locus of the movement of the cover 1 after the latch is released, i.e., the part of the suction nozzle 2 is the preferred part.
In another preferred embodiment, as shown in fig. 3 and 4b, the side of the upper end of the suction nozzle 2 remote from the hinge pin 9 is provided with a protrusion 7, and the opening trajectory of the cover 1 after the unlatching coincides with the protrusion 7 of the suction nozzle 2 in the closed position.
In this embodiment, when the side of the upper end of the suction nozzle 2 farthest from the hinge pin 9 away from the hinge pin 9 cannot coincide with the opening locus of the cover 1 after the latch release, a protrusion 7 may be provided on the side of the upper end of the suction nozzle 2 away from the hinge pin 9 to achieve the above-mentioned coincidence of the suction nozzle 2 and the cover 1.
In another preferred embodiment, as shown in fig. 4a-4c, the opening trajectory of the cover 1 at its end remote from the hinge pin 9 coincides with the contour of the suction nozzle 2 in the closed position after the latch has been released.
In the present embodiment, the overlapping range of the opening locus of the end portion of the cover 1 away from the hinge pin 9 and the suction nozzle 2 in the closed position is maximized, so it is relatively easy to design the overlapping of the opening locus of the portion of the cover 1 and the suction nozzle 2 in the closed state, that is, the portion of the cover 1 is the preferable portion.
In another preferred embodiment, as shown in fig. 3, 4a-4b, in which the closing element 6 is arranged on a projection of the end of the cover 1 remote from the hinge pin 9, the cover 1 latches a recess of the end of the plate 3 remote from the hinge pin 9 by means of the closing element 6, the opening trajectory of the closing element 6 coincides with the contour of the suction nozzle 2 in the closed position after the cover 1 is unlatched.
As shown in fig. 4a-4b, the latching structure of the closing element 6 and the plate 3 on the cover 1 is a structure commonly used in the art, but in this embodiment, the movement opening track of the closing element 6 is designed to coincide with the outline of the suction nozzle 2, and the suction nozzle 2 is carried to be opened synchronously by the interaction force generated when the closing element contacts the suction nozzle 2, so that the two steps of opening the cover 1 and opening the suction nozzle 2 can be completed synchronously, which achieves two purposes at a time.
In another preferred embodiment, as shown in fig. 3 and 4a-4b, the upper end of the suction nozzle 2 is provided with a protrusion 7 on the side away from the hinge pin 9, the closing element 6 is another protrusion provided on the end of the cover 1 away from the hinge pin 9, the cover 1 latches a recess on the end of the plate 3 away from the hinge pin 9 by means of the closing element 6, and after the cover 1 is unlatched, the opening trajectory of the closing element 6 is in contact with the protrusion 7 of the suction nozzle 2 in the closed position.
In another preferred embodiment, as shown in fig. 2, 4c, in order to achieve an automatic separation of the cover 1 and the suction nozzle 2, the suction nozzle 2 is provided with a limiting mechanism 8 at its connection with the hinge pin 9, so that the maximum opening angle β of the suction nozzle 2 is achieved2Less than the maximum opening angle β of the cover 11。
As shown in fig. 2, the capsule type dry powder inhaler of the present embodiment has a specific structure including: a cover cap 1, a suction nozzle 2, a plate 3 with a capsule cavity 13 fixed below, an operating mechanism 4 with a puncture needle 10, a lower shell 5; the cover cap 1, the suction nozzle 2, the plate 3 and the lower shell 5 are respectively connected with a hinge pin 9 through a cover cap hinge seat 9a, a suction nozzle hinge seat 9b, a plate hinge seat 9c and a lower shell hinge seat 9d, the top of the capsule cavity 13 is opened on the plate 3, the cover cap 1 is provided with a closing element 6 and locked by the closing element 6 to cover the suction nozzle 2 in a closed position, the suction nozzle 2 in the closed position is locked on a first groove 11b of the plate 3 through a first lug 11a and covers the top of the capsule cavity 13 on the plate 3, and the plate 3 is locked on a second groove 12b of the lower shell 5 through a second lug 12 a.
As shown in fig. 2 and 3, the suction nozzle hinge mount 9b in this embodiment is of a double-lug ring type, the plate hinge mount 9c is of a single-lug ring type, the plate hinge mount 9c is installed at the middle position of the hinge pin 9, and the suction nozzle hinge mount 9b is installed at the adjacent two sides of the plate hinge mount 9c, wherein the plate hinge mount 9c is provided with a baffle 91c, the limiting mechanism 8 is installed on the suction nozzle hinge mount 9b in a bridging manner, and when the suction nozzle 2 is located at the maximum opening angle β 2, the limiting mechanism 8 abuts against the baffle 91c and limits the suction nozzle 2 from being further opened.
In this embodiment, the limiting mechanism 8 of the nozzle hinge seat 9b is abutted against the plate 3 when the nozzle 2 is at the maximum opening angle β 2 so that the nozzle 2 is limited with respect to the hood 1. since most of the structure of the plate 3 is positioned at the other side of the lower case 5 when the nozzle 2 is opened, the limiting function cannot be generated before the lower case 5 is abutted against the limiting mechanism 8. therefore, the present embodiment achieves the object of the present invention by providing the baffle 91c on the plate hinge seat 9c and disposing the limiting mechanism 8 on the nozzle hinge seat 9b in the form of a bridging seat.
The position-limiting mechanism 8 in this embodiment can also be other conventional position-limiting structures in the hinge, when the cover 1 is rotated to the maximum opening angle β 1 around the hinge pin 9, the nozzle 2 has a maximum flip-open angle β 2 smaller than the maximum flip-open angle β 1 of the cover 1 due to the effect of the position-limiting mechanism 8 at the hinge pin 9, so that the cover 1 and the nozzle 2 are separated after being completely opened, and the nozzle 2 is not completely embedded in the cover 1, as shown in fig. 4c, in the state that the cover 1 and the nozzle 2 of the capsule type dry powder inhaler in the prior art are completely opened, the user usually needs to pull out from the cover 1 by means of the screen 14 of the nozzle 2 and lock on the plate 3, so that the nozzle 2 can be used for subsequent administration of medicine, and in this embodiment, the user does not need to touch the screen 14, thereby avoiding the risk of contaminating the screen 14.
In another preferred embodiment, as shown in FIG. 4c, wherein the maximum opening angle β of the closure 11Maximum opening angle β with the suction nozzle 22Is larger than the angle α between the cover 1 and the suction nozzle 2 when the path of movement of the closing element 6 is in contact with the suction nozzle 2 in the closed position, under which conditionThe suction nozzle 2 is automatically separated from the cover 1 in a flicking manner.
The operation of the capsule type dry powder inhaler in the present embodiment is as follows:
firstly taking out the suction device, then separating the cover 1 from the lower shell 5 by pressing the operating mechanism 4, then opening the cover 1, in the opening process, the closing element 6 on the cover 1 is contacted with the bulge 7 on the suction nozzle 2, the included angle between the cover 1 and the suction nozzle 2 is α, then continuing to turn the cover 1 upwards, an upward friction force is generated between the closing element 6 and the bulge 7 on the suction nozzle 2, the maximum friction force is larger than the force of the suction nozzle 2 for clamping the plate 3 and smaller than the force of the plate 3 for clamping the lower shell 5, under the action of the friction force, the clamping between the first lug 11a of the suction nozzle 2 and the first groove 11b on the plate 3 is released, the suction nozzle 2 is opened along with the cover 1, and at the moment, the cover 1 turns β around the cover hinge seat 9a1And the overturning angle β of the suction nozzle 2 due to the existence of the limiting mechanism 82Less than β1And due to α<β, wherein β is β1And β2The suction nozzle 2 is bounced off from the cover cap 1 by the difference value of the difference value, so that the automatic separation of the cover cap 1 and the suction nozzle 2 is realized; then the capsule is put into the capsule cavity 13; and the suction nozzle 2 is locked on the plate 3; pressing the operating mechanism 4, the puncture needle 10 punctures the capsule; the patient inhales the medicine powder from the suction nozzle 2; finally removing the empty capsule; after cleaning, the cover cap 1 is closed to complete the inhalation process of the medicinal powder.
Claims (11)
1. A capsule type dry powder inhaler comprising: a cover cap (1), a suction nozzle (2), a plate (3) with a capsule cavity (13) fixed below, an operating mechanism (4) with a puncture needle (10) and a lower shell (5); the cover cap (1), the suction nozzle (2), the plate (3) and the lower shell (5) are connected through a single shaft, the top of the capsule cavity (13) is opened on the plate (3), a closing element (6) is arranged on the cover cap (1) and locked through the closing element (6) to cover the suction nozzle (2) in a closed position, the suction nozzle (2) in the closed position is locked on the plate (3) and covers the top of the capsule cavity (13) on the plate (3), and the plate (3) is locked on the lower shell (5); the suction nozzle is characterized in that an opening track of the cover cap (1) after the locking is released is overlapped with the outline of the suction nozzle (2) in the closed position, so that the cover cap (1) is in contact with the suction nozzle (2) in the opening process to carry the suction nozzle (2) to be opened synchronously.
2. The capsule type dry powder inhaler of claim 1, wherein the cap (1) makes only a rubbing contact with the suction nozzle (2) in the closed position during the opening process, and the maximum frictional force generated when the cap (1) makes contact with the suction nozzle (2) in the closed position is greater than the latching force of the suction nozzle (2) with the plate member (3) and less than the latching force of the plate member (3) with the lower casing (5).
3. The capsule-type dry powder inhaler of claim 1, wherein the cap (1), the mouthpiece (2), the plate (3) and the lower casing (5) are connected by a hinge pin (9).
4. The capsule-type dry powder inhaler of claim 1, the mouthpiece (2) in the closed position being latched on a first groove (11b) of the plate (3) by a first lug (11a), the plate (3) being latched on a second groove (12b) of the lower shell (5) by a second lug (12 a).
5. The capsule-type dry powder inhaler of claim 3, wherein the opening trajectory of the cover (1) after releasing the latch coincides with a side of the upper end of the mouthpiece (2) in the closed position away from the hinge pin (9).
6. A capsule type dry powder inhaler according to claim 3, wherein the opening trajectory of the end of the cover (1) remote from the hinge pin (9) coincides with the contour of the mouthpiece (2) in the closed position after the latch is released.
7. A capsule type dry powder inhaler according to claim 3, wherein the closing element (6) is a protrusion provided at an end of the cover (1) remote from the hinge pin (9), the cover (1) is latched to a groove at an end of the plate (3) remote from the hinge pin (9) by the closing element (6), and the opening trajectory of the closing element (6) coincides with the contour of the mouthpiece (2) in the closed position after the latch of the cover (1) is released.
8. A capsule type dry powder inhaler according to claim 3, wherein the side of the upper end of the suction nozzle (2) remote from the hinge pin (9) is provided with a protrusion (7), and the opening trajectory of the cover cap (1) after releasing the latch coincides with the protrusion (7) of the suction nozzle (2) in the closed position.
9. The capsule type dry powder inhaler of claim 8, wherein the closing element (6) is a protrusion provided at an end of the cover (1) remote from the hinge pin (9), the cover (1) latches a groove of an end of the plate (3) remote from the hinge pin (9) by the closing element (6), and after the cover (1) is unlatched, an opening trajectory of the closing element (6) coincides with the protrusion (7) of the mouthpiece (2) in the closed position.
10. The capsule-type dry powder inhaler according to claim 3, wherein a stopper mechanism (8) is provided at the connection of the suction nozzle (2) and the hinge pin (9) so that the maximum opening angle β of the suction nozzle (2)2Less than the maximum opening angle β of the cover (1)1。
11. The capsule type dry powder inhaler of claim 10, wherein the maximum opening angle β of the cover cap (1)1A maximum opening angle β with the suction nozzle (2)2Is greater than the angle α between the cover (1) and the suction nozzle (2) when the opening trajectory of the closing element (6) is in contact with the suction nozzle (2) in the closed position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811299301.3A CN111135403A (en) | 2018-11-02 | 2018-11-02 | Capsule type dry powder inhaler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811299301.3A CN111135403A (en) | 2018-11-02 | 2018-11-02 | Capsule type dry powder inhaler |
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| CN111135403A true CN111135403A (en) | 2020-05-12 |
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| CN201811299301.3A Pending CN111135403A (en) | 2018-11-02 | 2018-11-02 | Capsule type dry powder inhaler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116747391A (en) * | 2023-07-07 | 2023-09-15 | 苏州新劢德医疗器械科技有限公司 | Powder inhaler device and medicament box with misoperation preventing mechanism |
| WO2025010906A1 (en) * | 2023-07-07 | 2025-01-16 | 苏州新劢德医疗器械科技有限公司 | Powder inhalation device and medicament box |
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| US20140318538A1 (en) * | 2011-11-25 | 2014-10-30 | Mahmut Bilgic | Inhalation device |
| US20160022931A1 (en) * | 2013-03-08 | 2016-01-28 | Laboratorios Cinfa, S.A. | Inhaler |
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| TW461294U (en) * | 2000-01-31 | 2001-10-21 | Pan Chau Shian | Structure of cover for rotary cup (kettle) |
| CN1874817A (en) * | 2003-11-08 | 2006-12-06 | 贝林格尔·英格海姆国际有限公司 | Powder inhaler |
| US20140318538A1 (en) * | 2011-11-25 | 2014-10-30 | Mahmut Bilgic | Inhalation device |
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| CN116747391A (en) * | 2023-07-07 | 2023-09-15 | 苏州新劢德医疗器械科技有限公司 | Powder inhaler device and medicament box with misoperation preventing mechanism |
| WO2025010906A1 (en) * | 2023-07-07 | 2025-01-16 | 苏州新劢德医疗器械科技有限公司 | Powder inhalation device and medicament box |
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