Reservoir-type multi-dose dry powder inhaler

Abstract

The utility model relates to a storage type multi-dose dry powder inhaler, and belongs to the field of powder inhalation administration. Comprising a main body, an airflow indicating assembly and a counting assembly. Wherein a medicine bin is arranged in the main body, the medicine bin is used for uniformly containing multiple doses of medicine powder, a set air inlet flow channel is formed in the position, located on the peripheral face of the medicine bin, of the main body, and a vertical indication channel is arranged in the air inlet flow channel. The indicating channel can allow the indicating ball to freely move up and down along a linear path, the position of the indicating ball in the indicating channel is driven to change through the inspiration action in the using process of a patient, the patient can obtain real-time feedback about whether the inspiration action reaches the standard or not, and therefore the subsequent inspiration force is adjusted, and the inspiration effect is improved. And the optimal administration effect is ensured.

Description

Technical Field

[0001] The utility model relates to a medicinal dry powder inhaler, in particular to a storage type dry powder inhaler which utilizes a medicine bin to store multiple doses of medicine powder. Background Art

[0002] Dry powder inhalers and inhaled aerosols are both portable inhaled drug delivery treatment methods. Dry powder inhalers have better patient compliance because they require active inhalation by the patient. Compared with inhaled aerosols, which require the addition of propellants as a driving means, dry powder inhalers are also more environmentally friendly. The main dry powder inhalers are divided into capsule type, blister type and reservoir type.

[0003] The counting method of the existing reservoir-type dry powder dispensers on the market is configured in units of 10, that is, every ten uses correspond to one change of the counting wheel. Although this method satisfies the patient's vague estimation of the amount of remaining powder in the device, it cannot achieve a refined indication and the digital display is small. When the remaining powder dose in the inhaler device is less than 10, the patient may misjudge the indication and fail to prepare a new dry powder inhaler device in time.

[0004] The dry powder inhaler uses the patient's active inhalation as a driving mode, which also leads to the use of the device having requirements on the patient's inhalation strength. When the patient's inhalation strength is weak, the powder will remain in the patient's mouth or throat, affecting the effect of drug administration into the lungs. At the same time, the state of the powder will also affect the drug administration effect. When the powder clumps, the patient needs to shake the device before use to evenly disperse the powder inside. The existing reservoir-type dry powder inhalers on the market use a non-transparent shell, which makes it difficult for patients to judge whether the powder inside the device is evenly dispersed, whether a single dose of powder has been completely inhaled, and it is also difficult to adjust the subsequent inhalation strength based on real-time feedback. Utility Model Content

[0005] The main purpose of the utility model is to provide a reservoir type multi-dose dry powder inhaler with more accurate counting and capable of giving patients real-time feedback during the inhalation and drug administration process in view of the above problems.

[0006] A reservoir type multi-dose dry powder inhaler, comprising a mouthpiece cover, a mouthpiece, an airflow indicating assembly, an outer cover, a spring, a medicine chamber cover, a main body, a medicine distributor and a counting assembly, wherein:

[0007] The main body is provided with a medicine bin, which is used to uniformly accommodate multiple doses of medicine powder, and a non-enclosed cylindrical empty slot is connected below the medicine bin, and the empty slot is used to accommodate the medicine distributor, and the main body is provided with a channel that matches the suction nozzle in the horizontal direction on the non-enclosed cylindrical empty slot;

[0008] The medicine bin cover is connected to the medicine bin and is used to seal the medicine powder stored in the medicine bin;

[0009] Running ratchets are arranged at both ends of the medicine distributor, and a transmission arm is arranged on the outer cover, and the transmission arm is meshed with the running ratchets;

[0010] One end of the spring is connected to the medicine chamber cover, and the other end is in contact with the inside of the outer cover, giving the outer cover a rebound force opposite to the pressing direction;

[0011] The airflow indicating assembly includes an indicating ball and an indicating cover plate;

[0012] The counting assembly includes a high-position counting wheel and a low-position counting wheel;

[0013] The suction nozzle can enclose the main body, the airflow indicating component, the medicine distributor and the counting component. A number indicating window is arranged on the plane of the suction nozzle closest to the counting component, through which part of the end faces of the high-position counting wheel disc and the low-position counting wheel disc can be seen;

[0014] Furthermore, the main body is provided with a predetermined air intake channel on the outer surface of the medicine bin, and the air intake channel includes a vertical indication channel, and the indication channel allows the indication ball to move freely up and down along a straight path. The outer cover is provided with an indication display window, through which the position change of the indication ball can be observed.

[0015] Preferably, the indicating ball can be made of stainless steel materials selected from the following: stainless steel series commonly known as 304 that conforms to national standard grade 06Cr19Ni10 or other equivalent standards of other countries; stainless steel series commonly known as 316 that conforms to national standard grade 0Cr17Ni12Mo2 or other equivalent standards of other countries.

[0016] Preferably, the indicating ball can be made of aluminum alloy material.

[0017] Preferably, the indicator ball is made of polymer resin material.

[0018] Preferably, the indicator ball can be made of a coating material such as polytetrafluoroethylene (PTFE) or polyester resin (PET).

[0019] Preferably, when the whole dry powder inhaler is not pressed, that is, when the spring is not contracted by an external force, the indication display window corresponds to an upper section of the indication channel.

[0020] Preferably, the indicating cover is made of a transparent material, and an opaque indicating mark is provided on the indicating cover corresponding to the upper position of the indicating channel.

[0021] Furthermore, the main body is made of transparent material.

[0022] Furthermore, during use by the patient, the indicator ball will be pushed due to the flow of inspiratory airflow, and different positions of the indicator ball in the indicator channel correspond to the strength of the inspiratory airflow. When the indicator ball is pushed to the indicator mark or above the indicator mark, the inspiratory airflow volume reaches the preset standard, which will ensure the best drug administration effect.

[0023] Furthermore, a group of sequentially arranged numbers 0-9 are arranged on the outer circumference of one end surface of the low-position counting wheel, the center position of the low-position counting wheel is an empty hole, the shape of the empty hole is polygonal, and a carry protrusion is arranged on the outer circumference of the other end of the low-position counting wheel.

[0024] Furthermore, a group of sequentially arranged numbers 0-N are arranged on the outer circumference of one end face of the high-position counting wheel, where N is a number greater than 1. The other end face of the high-position counting wheel is a gear structure, which can mesh with the carry protrusion on the low-position counting wheel. A counting termination protrusion is arranged on the other end face of the high-position counting wheel.

[0025] Preferably, the low-position counting wheel is coaxially arranged with the medicine distributor.

[0026] Furthermore, the medicine dispenser is an overall cylindrical structure, with multiple quantitative holes evenly distributed on its curved surface, and a single quantitative hole can accommodate a single dose of medicine powder. One end of the medicine dispenser is a closed structure, and is provided with a polygonal convex column, which can cooperate with the central empty hole of the low-position counting wheel, and the other end of the medicine dispenser is provided with a sealing groove.

[0027] Preferably, a sealing convex ring is provided inside the empty slot in the main body for accommodating the medicine dispenser, and the sealing convex ring corresponds to the sealing groove, and the two are tightly matched.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] 1. The double gears are used to complete the counting function, making the counting results more refined. The number displayed in the counting window jumps once with each use of the device, and the counting unit is accurate to 1. It can help patients improve their medication plans, prepare new devices in time, and avoid delays in medication due to incorrect estimates of the dosage of the powder in the device.

[0030] 2. Add an airflow indicator component to the device to visualize the patient's inhalation action. When the indicator ball in the airflow indicator component does not reach the indicator position, it means that the patient's inhalation strength at this time does not meet the standard, and it is necessary to increase the subsequent inhalation strength to ensure that the powder can enter the patient's lungs along with the inhalation, ensuring that the effect of each inhalation medication is optimal.

[0031] 3. The main body of the device is made of transparent material, and the suction nozzle is designed as a four-sided structure, leaving a space for the back panel of the main body, so that the patient can directly observe the approximate remaining dose and status of the powder inside the medicine chamber through the back of the device, and remind the patient whether the powder inside the device has been shaken evenly before using the device to inhale the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments of the present invention, in which:

[0033] Figure 1 It is a structural explosion diagram of a reservoir-type multi-dose dry powder inhaler according to a preferred embodiment of the utility model;

[0034] Figure 2 This is a schematic diagram of the structure of a medicine distributor according to a preferred embodiment of the utility model;

[0035] Figure 3 It is a front cross-sectional view of the matching part of the medicine distributor and the main body according to a preferred embodiment of the utility model;

[0036] Figure 4 is a partial cross-sectional view of a counting assembly of a reservoir-type multi-dose dry powder inhaler according to a preferred embodiment of the utility model;

[0037] Figure 5 is a schematic diagram of a counting assembly according to a preferred embodiment of the utility model;

[0038] Figure 6 It is a left side view of the medicine distributor and the main body according to a preferred embodiment of the utility model;

[0039] Figure 7 It is a schematic diagram of the airflow direction of a reservoir-type multi-dose dry powder inhaler according to a preferred embodiment of the utility model;

[0040] Figure 8 It is a front view of the airflow indicating assembly and the main body according to a preferred embodiment of the utility model;

[0041] Fig. 9 It is a front view of a reservoir-type multi-dose dry powder inhaler according to a preferred embodiment of the utility model without a mouthpiece and a mouthpiece cover;

[0042] Fig.10 is a side sectional view of a reservoir-type multi-dose dry powder inhaler according to a preferred embodiment of the utility model;

[0043] Fig.11 is a side view of a reservoir-type multi-dose dry powder inhaler in a semi-open state according to a preferred embodiment of the utility model;

[0044] Among them: 1-sucking nozzle cover, 2-sucking nozzle, 3-airflow indication assembly, 4-outer cover, 5-spring, 6-medicine chamber cover, 7-main body, 8-medicine distributor, 9-counting assembly, 11-stop arm, 21-indicating window, 22-air outlet flow channel, 31-indicating ball, 32-indicating cover plate, 321-indicating mark, 41-transmission arm, 42-indicating display window, 71-high-position counting wheel stop block, 72-indicating channel , 73-air inlet, 74-air inlet flow channel, 75-air outlet, 76-high-position counting wheel anti-reversal block, 77-dispenser anti-reversal arm, 78-medicine chamber, 79-sealing convex ring, 81-running ratchet, 82-dispenser anti-reversal wheel, 83-quantitative hole, 84-convex column, 85-sealing groove, 91-high-position counting wheel, 911-counting termination protrusion, 92-low-position counting wheel, 921-carry protrusion. DETAILED DESCRIPTION

[0045] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0046] Figures 1 to 11 A preferred embodiment of the reservoir-type multi-dose dry powder inhaler of the utility model is shown, which includes: a mouthpiece cover 1, a mouthpiece 2, an airflow indicating component 3, an outer cover 4, a spring 5, a medicine chamber cover 6, a main body 7, a medicine distributor 8 and a counting component 9. Among them:

[0047] The nozzle cover 1 is used to cover the part of the nozzle 2 that enters the patient's mouth when the device is not in use, so as to ensure that the part of the nozzle 2 that enters the patient's mouth is not contaminated when it is not in use. The nozzle 2 is a four-sided structure, leaving a back plate position of the main body 7 empty, so that the patient can directly observe the approximate remaining dose of the powder inside the medicine bin and the state of the powder through the back of the device, and remind the patient whether the powder inside the device has been shaken evenly before using the device to inhale the powder. A medicine bin 78 is provided in the main body 7, and multiple doses of powder can be uniformly stored in the medicine bin 78. The medicine bin cover 6 is used to connect to the upper opening of the medicine bin 78 to play a sealing role. The spring 5 is fixed between the medicine bin cover 6 and the outer cover 4, and is used to give the outer cover 4 a rebound force opposite to the pressing direction after the patient completes the pressing action when using the device, so that the outer cover 4 returns to its original position. The airflow indication component 3 includes an indication ball 31 and an indication cover plate 32; the counting component 9 includes a high-position counting wheel 91 and a low-position counting wheel 92.

[0048] like Figure 2-3 As shown, the medicine distributor 8 is a cylindrical structure as a whole, and a plurality of recessed quantitative holes 83 are evenly distributed on its curved surface. The amount of powder that can be accommodated by a single quantitative hole 83 is fixed to the dose for a single inhalation. Running ratchets 81 are provided at both ends of the medicine distributor 8, and the gear distribution of the running ratchets 81 at both ends is exactly the same. One end of the medicine distributor 8 is a closed structure, and a polygonal convex column 84 is provided on its end surface. A medicine distributor anti-reverse wheel 82 and a sealing groove 8 are provided on the curved surface of the other end of the medicine distributor 8, wherein the gears of the medicine distributor anti-reverse wheel 82 and the running ratchet 81 are staggered.

[0049] A sealing convex ring 79 is provided inside the empty slot of the main body 7 located below the medicine bin 78 for accommodating the medicine distributor 8. When the medicine distributor 8 is installed, a quantitative hole 83 provided on the curved surface of the medicine distributor 8 will be located directly below the outlet of the medicine bin 78, and the position of the sealing convex ring 79 corresponds to the position of the sealing groove 85, and the two are closely matched to ensure the sealing performance of the quantitative hole 83 during use, and also play the role of fixing the medicine distributor 8 to prevent the medicine distributor 8 from being shifted left and right due to shaking, moving and other actions, and the position of the quantitative hole 83 is always located directly below the outlet of the medicine bin 78.

[0050] like Figure 4-6As shown, two transmission arms 41 extend downward from the front end of the outer cover 4, and the bottom positions of the two transmission arms 41 correspond to the positions of the running ratchet wheels 81 at both ends of the medicine distributor 8. Through the transmission arms 41, the medicine distributor 8 will rotate as the outer cover 4 is pressed. A high-position counting wheel stop block 71 and a high-position counting wheel anti-reversal block 76 are arranged on the surface of the main body 7 for connecting with the counting assembly 9. A medicine distributor anti-reversal arm 77 is arranged inside the position of the main body 7 for accommodating the medicine distributor 8. The medicine distributor anti-reversal arm 77 is a flexible structure, and its position corresponds to the position of the medicine distributor anti-reversal wheel 82 on the medicine distributor 8, and can be engaged with the ratchet of the medicine distributor anti-reversal wheel 82 to prevent the medicine distributor 8 from rotating in the reverse direction.

[0051] A group of numbers 0-9 arranged evenly in sequence are arranged on the outer periphery of one end surface of the low-position counting wheel 92. An empty hole is left in the center of the low-position counting wheel 92. The shape of the empty hole is polygonal and can be tightly connected with the polygonal protrusion 84 provided on the medicine distributor 8, so that the low-position counting wheel 92 and the medicine distributor 8 can rotate synchronously. A carry protrusion 921 is provided on the outer periphery of the other end of the low-position counting wheel 92. The carry protrusion is in the shape of a single tooth.

[0052] A group of numbers 0-20 arranged in sequence are arranged on the outer circumference of one end surface of the high-position counting wheel 91, and the other end is a gear structure, which can mesh with the carry protrusion 921. After the low-position counting wheel 92 rotates one circle, the carry protrusion 921 will contact the gear part of the high-position counting wheel 91 once, driving the high-position counting wheel to rotate once. A counting termination protrusion 911 is arranged inside the gear. After the high-position counting wheel 91 rotates one circle, the counting termination protrusion 911 can contact the high-position counting wheel termination block to prevent the high-position counting wheel 91 from rotating more than a predetermined number of times. At the same time, the gear part of the high-position counting wheel 91 contacts the high-position counting wheel anti-reversal block 76 to prevent the high-position counting wheel 91 from being misaligned and offset due to shaking, moving and other actions during the daily use of the device, thereby ensuring the counting accuracy of the device.

[0053] like Figure 7-9 As shown, the main body 7 is provided with a predetermined air inlet flow channel 74 on the outer plane of the medicine bin 78, and the air inlet flow channel 94 includes a vertical indicating channel 72, and the indicating channel 72 allows the indicating ball 31 in the air flow indicating assembly 3 to move freely up and down along a straight path. When the patient uses the device to inhale, the airflow enters the air inlet flow channel 74 from the air inlet 73, and part of the airflow passes through the indicating channel 72 to push the indicating ball 31 upward, and the rest of the airflow passes through the air inlet flow channel 74 and passes through a quantitative hole 83 according to a predetermined route. The airflow carries the powder in the quantitative hole 83 and is discharged through the air outlet 75 connected to the suction nozzle 2.

[0054] The indicator cover 32 is made of transparent material, and an opaque indicator mark 321 is arranged on the front thereof. The position of the indicator mark 321 corresponds to the upper part of the indicator channel 72 after the indicator cover 32 is installed. An indicator display window 42 is arranged on the front of the outer cover 4. When the whole device is not pressed, that is, the outer cover 4 is in the original state, the indicator display window 42 corresponds to the upper part of the indicator channel 72. At this time, the indicator ball 31 will not appear in the indicator display window 42 due to gravity. When the patient uses the device to inhale, the inhalation airflow pushes the indicator ball 31 to move upward. At this time, if the position of the indicator ball 31 reaches or is higher than the position of the indicator mark 321, it means that the inhalation air flow at this time reaches the standard that can ensure the effect of the medication. If the position of the indicator ball 31 is lower than the position of the indicator mark 321, it means that the subsequent continuous inhalation action needs to increase the inhalation air flow.

[0055] like Figure 10-11 As shown, when the patient does not press the device housing 4, there is a corresponding quantitative hole 83 just below the outlet of the medicine bin 78, and the powder in the medicine bin 78 will fall into the quantitative hole 83 in a quantitative manner. When the patient presses the housing 4 once, the housing 4 drives the medicine distributor 8 to rotate once, and the quantitative hole 83 with powder inside will be rotated to the junction of the air inlet flow channel 74 and the air outlet 75. At this time, the patient puts the mouthpiece 2 into the oral cavity to inhale, and the air flow will carry the powder in the quantitative hole 83 through the air outlet flow channel 22 and finally enter the patient's body. At the same time, the next empty quantitative hole 83 rotates to the right below the outlet of the medicine bin 78, completing the use of the predetermined amount of powder to be used next time.

[0056] The nozzle 2 can enclose the main body 7, the airflow indicating assembly 3, the medicine distributor 8 and the counting assembly 9. The nozzle 2 is provided with a number window 21 on the plane closest to the counting assembly 9, through which the numbers on the upper counting wheel 91 and the lower counting wheel 92 can be seen. The nozzle cover 1 is provided with a stop arm 11. When the nozzle cover 1 is fully buckled on the device, the stop arm 11 will contact the outer cover 4 to limit the downward movement of the outer cover 4, ensuring that the device will not be accidentally touched and pressed due to external force when it is not in use, and ensuring that each pressing and moving of the outer shell 4 corresponds to an actual inhalation medication use.

[0057] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the position or location relationship are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0058] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A reservoir-type multi-dose dry powder inhaler, comprising a mouthpiece cover, a mouthpiece, an airflow indicating assembly, an outer cover, a spring, a medicine chamber cover, a main body, a medicine distributor and a counting assembly, wherein: The main body is provided with a medicine bin, which is used to uniformly accommodate multiple doses of medicine powder, and a non-enclosed cylindrical empty slot is connected below the medicine bin, and the empty slot is used to accommodate the medicine distributor, and the main body is provided with a channel that matches the suction nozzle in the horizontal direction on the non-enclosed cylindrical empty slot; The medicine bin cover is connected to the medicine bin and is used to seal the medicine powder stored in the medicine bin; Running ratchets are arranged at both ends of the medicine distributor, and a transmission arm is arranged on the outer cover, and the transmission arm is meshed with the running ratchets; One end of the spring is connected to the medicine chamber cover, and the other end is in contact with the inside of the outer cover, giving the outer cover a rebound force opposite to the pressing direction; The airflow indicating assembly includes an indicating ball and an indicating cover plate; The counting assembly includes a high-position counting wheel and a low-position counting wheel; The suction nozzle can enclose the main body, the airflow indicating component, the medicine distributor and the counting component. A number indicating window is arranged on the plane of the suction nozzle closest to the counting component, through which part of the end faces of the high-position counting wheel disc and the low-position counting wheel disc can be seen; It is characterized in that the main body is provided with a predetermined air intake channel on the outer surface of the medicine bin, the air intake channel contains a vertical indication channel, the indication channel allows the indication ball to move freely up and down along a straight path, and the outer cover is provided with an indication display window, through which the position change of the indication ball can be observed.

2. The reservoir-type multi-dose dry powder inhaler according to claim 1, characterized in that: When the whole dry powder inhaler is not pressed, that is, the spring is not contracted by an external force, the indication display window corresponds to the upper section of the indication channel.

3. The reservoir-type multi-dose dry powder inhaler according to claim 1, characterized in that: The indicating cover is made of a transparent material, and an opaque indicating mark is arranged at the upper position of the indicating cover corresponding to the indicating channel.

4. The reservoir-type multi-dose dry powder inhaler according to claim 1, characterized in that: The main body is made of transparent material.

5. The reservoir-type multi-dose dry powder inhaler according to claim 3, characterized in that: During use by the patient, the indicator ball will be pushed by the flow of inspiratory airflow. Different positions of the indicator ball in the indication channel correspond to the strength of the inspiratory airflow. When the indicator ball is pushed to the indicator mark or above the indicator mark, the inspiratory airflow volume reaches the preset standard, which will ensure the best drug administration effect.

6. The reservoir-type multi-dose dry powder inhaler according to claim 1, characterized in that: A group of sequentially arranged numbers 0-9 are arranged on the outer circumference of one end surface of the low-position counting wheel, the center position of the low-position counting wheel is an empty hole, the shape of the empty hole is polygonal, and a carry protrusion is arranged on the outer circumference of the other end of the low-position counting wheel.

7. The reservoir-type multi-dose dry powder inhaler according to claim 6, characterized in that: A group of sequentially arranged numbers 0-N are arranged on the outer circumference of one end face of the high-position counting wheel, where N is a number greater than 1. The other end face of the high-position counting wheel is a gear structure, which can be engaged with the carry protrusion on the low-position counting wheel. A counting termination protrusion is arranged on the other end face of the high-position counting wheel.

8. The reservoir-type multi-dose dry powder inhaler according to claim 6, characterized in that: The low-position counting wheel is coaxially arranged with the medicine distributor.

9. The reservoir-type multi-dose dry powder inhaler according to claim 8, characterized in that: The medicine distributor is generally cylindrical in structure, with multiple quantitative holes evenly distributed on its curved surface. A single quantitative hole can accommodate a single dose of medicine powder. One end of the medicine distributor is a closed structure with a polygonal convex column, which can cooperate with the central empty hole of the low-position counting wheel. The other end of the medicine distributor is provided with a sealing groove.

10. The reservoir-type multi-dose dry powder inhaler according to claim 9, characterized in that: A sealing convex ring is arranged inside the empty groove in the main body for accommodating the medicine distributor, and the sealing convex ring corresponds to the sealing groove, and the two are tightly matched.

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