Single dose dry powder inhaler

Abstract

The invention relates to a single-dose dry powder inhaler, and belongs to the field of medical instruments. Comprising an upper cover, a suction nozzle, a base, a pricking needle, a spring and a pricking needle push button. Wherein the base comprises a capsule bin, and the suction nozzle and the base adopt a bolt clamping structure, so that the suction nozzle is detachably connected right above the capsule bin in the use process. The bolt clamping structure is simple, and the connection position can be prevented from being damaged due to the wrong opening mode. Meanwhile, the detachable structure facilitates complete exposure of the capsule bin after use, facilitates pouring of the used capsule shell out of the device, facilitates cleaning and airing of the device, and avoids influence on use of the medicine powder capsules in the future due to poor cleaning.

Description

Technical Field

[0001] The present invention relates to a single-dose dry powder inhaler, which uses a capsule to store medicine powder in advance and is used for delivering powder medicines, especially for delivering powder medicines for treating respiratory diseases (such as asthma and chronic obstructive pulmonary disease). Background Art

[0002] There are various types of single-dose dry powder inhalers in the field of dry powder inhaler technology. The single-dose dry powder inhalers commonly seen on the market now include a base, a nozzle and an outer cover structure, a needle push button is provided on the base for piercing a capsule to release powder, and the nozzle is connected to the base, and the nozzle can be pivoted to open or close by a rotating shaft or a hinge structure to take and place the capsule, and during use, the capsule position in the base is first exposed by rotating the nozzle, and the nozzle is still connected to the base by the rotating shaft or the hinge structure, and then the capsule is placed in the capsule position, the nozzle is closed, and the needle push button is pressed to pierce the capsule, so that the powder can be scattered from the capsule, and the air flow inside the base is changed by the nozzle, driving the powder to separate from the capsule and enter the patient's body, and then the nozzle is opened to expose the capsule position in the base, and the shell of the used capsule is taken out, and finally the nozzle and the outer cover are returned to their original positions for the next use.

[0003] However, there are still areas that need improvement in existing dry powder inhalers. For example, the rotating shaft or hinge part of the inhaler makes the nozzle and the base form an inseparable structure. When the capsule is swung during use and the powder is adsorbed on the wall of the chamber, the inseparable structure will increase the difficulty of cleaning and drying the device, and the rotating shaft or hinge part will hide water stains. In addition, when the patient misoperates, the rotating shaft or hinge structure may be easily damaged due to the wrong force point. Summary of the invention

[0004] The main purpose of the present invention is to provide a single-dose dry powder inhaler that is easier for patients to use and clean in response to the above problems.

[0005] A single-dose dry powder inhaler comprises: a base (3) having a groove arranged inside as a capsule compartment (304), guide holes being arranged on both sides of the groove, and a plurality of air intake channels (303a, 303b) and a pair of latch slots (301a, 301b); a mouthpiece (2) having an air channel (205) arranged inside, a mesh structure being formed at the center opening of the lower end as a filter (204), and a pair of latch structures (201a, 201b); a needle push button (6) being arranged on both sides of the base (3) and being movable toward the capsule compartment (304); a needle (4) being fixed on the needle push button (6), and the needle ( The tip of the capsule (4) can pass through the guide hole to the capsule compartment (304) of the base (3); a spring (5), one end of which is fixed to the puncture needle push button (6) and surrounds the puncture needle (4), and the other end is sleeved on the base (3); an upper cover (1) is detachably connected to the base (3) and can completely cover the suction nozzle (2) and the upper part of the base (3); further, the latch structure (201a, 201b) on the suction nozzle (2) cooperates with the latch slot (301a, 301b) on the base (3) to form a latch connection, so that the suction nozzle (2) can be detachably connected to the base (3).

[0006] Furthermore, the latch pin slots (301a, 301b) are three-sided enclosed structures.

[0007] Preferably, the nozzle latch (201a, 201b) is provided with a nozzle latch protrusion (202), and the base latch slot (301a, 301b) is provided with a base latch protrusion (302), and the two protrusions can be snap-fitted.

[0008] Furthermore, the suction nozzle (2) is provided with an indication mark (203), the shape of which specifies the opening direction of the suction nozzle and is a raised structure.

[0009] Furthermore, the nozzle latch (201a, 201b) and the base latch slot (301a, 301b) are symmetrical relative to the central axis of the base (3).

[0010] Furthermore, the upper cover (1) is provided with a plane as a finger contact surface (101), and the contact surface (101) is located at the golden section position when the entire device is in a closed state, that is, the ratio of the total length of the contact surface to the total height length of the entire device in a closed state is 0.618:1.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The single-dose dry powder inhaler of the present invention has a plug-in design for the nozzle and the base, so that the nozzle is detachable, that is, it can be completely separated from the base, which is more convenient during cleaning and leaves no dead corners.

[0013] 2. The single-dose dry powder inhaler of the present invention has a symmetrical structure inside, and the user can use the device without distinguishing the front and back sides, which is convenient for the user to use in poor light or poor eyesight.

[0014] 3. The single-dose dry powder inhaler of the present invention utilizes the special-shaped structure surrounded by the latch slot on three sides and the protrusion to lock and cooperate, which can limit the rotation of the nozzle relative to the base, thereby achieving a stable fixation effect.

[0015] 4. The single-dose dry powder inhaler of the present invention is opened without relying on a rotating shaft or hinge, thus avoiding the possibility of damaging the device structure due to an incorrect opening method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 with reference to the accompanying drawings, in which:

[0017] Figure 1 is a schematic diagram of a three-dimensional structure explosion of a single-dose dry powder inhaler according to a preferred embodiment of the present invention;

[0018] Figure 2 2. It is a schematic diagram of the internal structure of the nozzle and the base of a single-dose dry powder inhaler in a fully opened state according to a preferred embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of a single-dose dry powder inhaler according to a preferred embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the matching between the nozzle latch and the base latch slot according to a preferred embodiment of the present invention;

[0021] Figure 5 is a front view of a single-dose dry powder inhaler in a semi-open state according to a preferred embodiment of the present invention;

[0022] Wherein: 1-upper cover, 101-finger contact surface, 102-upper cover buckle, 103-handprint, 2-nozzle, 201a, 201b-nozzle latch, 202-nozzle latch protrusion, 203-indicator mark, 204-filter, 205-air channel, 3-base, 301a, 301b-empty latch slot, 302-base latch protrusion, 303a, 303b-intake air flow channel, 304-capsule compartment, 305-base buckle, 4-puncture needle, 5-spring, 6-puncture needle push button. DETAILED DESCRIPTION

[0023] 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.

[0024] Figures 1 to 5 The figure shows a preferred embodiment of the single-dose dry powder inhaler of the present invention. Similar to the conventional structure, it also includes: an upper cover 1, a mouthpiece 2, a base 3, a lancet 4, a spring 5, a lancet push button 6 and other structural parts. Among them:

[0025] A plane is provided on the upper side of the front and back surfaces of the upper cover 1 as a finger contact surface 101, which is located at the golden section position when the entire device is in a closed state, and the ratio of the total length of the contact surface to the total length of the height of the entire device in a closed state is 0.618:1. An arc-shaped notch is left at the lower end of the front and back surfaces of the upper cover 1 as an upper cover buckle 102, and a hand pattern 103 is provided on the side of the upper cover 1, both of which can assist the patient in opening the upper cover 1 when in use.

[0026] An internal air passage 205 is provided through the nozzle 2, and the lower end of the air passage is a mesh structure that breaks up the powder particles into absorbable small particles through collision, i.e., a filter 204. A pair of special-shaped latches 201a and 201b are provided diagonally at the lower end of the nozzle 2, and a protrusion 202 is provided at the inner end of the latch. An opening direction indicator mark 203 is provided on the nozzle 2, and the mark 203 is a protruding structure, which makes the opening method of the nozzle 2 more eye-catching, and is also convenient for the patient to apply force when opening the nozzle 2 to prevent the patient's hand from slipping.

[0027] The base 3 is provided with a groove inside for placing capsules, namely, the capsule compartment 304. The capsule compartment 304 is provided with a guide hole for the needle 4 to pass through. When the patient uses the device, the needle 4 enters the capsule compartment 304 through the guide hole to puncture the internal capsule so that the medicine powder can be dispersed. Two air intake channels 303a and 303b are provided at positions tangent to the two sides of the capsule compartment 304. When the patient uses the device, the mouth fits the suction nozzle 2 to inhale, and the air can enter the capsule compartment 304 in the device from the air intake channels 303a and 303b, forming an air vortex, driving the capsule to rotate, so that the medicine powder is thrown out of the capsule and enters the patient's body through the air channel 205 inside the suction nozzle 2. Latch slots 301a and 301b are provided at positions avoiding the capsule compartment 304 and the air intake flow channels 303a and 303b. The positions of the latch slots 301a and 301b correspond to the suction nozzle latches 201a and 201b. The slots are in a three-sided surrounding structure, which is convenient for the patient to position and insert the nozzle 2 while also preventing the nozzle 2 from shifting and rotating relative to the base 3. A protrusion 302 is provided inside, so that there is corresponding sound feedback when the nozzle 2 is fully engaged with the base 3. The upper ends of the front and rear surfaces of the base 3 are provided with arc-shaped notches as the base buckle opening 305, which corresponds to the upper cover buckle opening 102, and assists the patient to open the upper cover 1 when in use.

[0028] The puncture needle push button 6 is connected with a puncture needle 4, and the puncture needle 4 can be extended into the capsule compartment 304 by pressing the puncture needle push button 6, so as to puncture the capsule placed in the capsule compartment 304. In order to improve the puncture degree of the capsule in the capsule chamber by the puncture needle 4, two puncture needles are provided in this embodiment, and the two puncture needles 6 are arranged opposite to each other. A limit buckle is provided in the puncture needle push button 6, which contacts the base 3 and bears the elastic force of the puncture needle push button 6 when the spring 5 is released.

[0029] The non-spiking end of the puncture needle 4 is connected to the puncture needle push button 6, and the puncture end is limitedly connected to the base 3. When the puncture needle push button 6 is pressed and stressed, the puncture needle 4 enters the capsule compartment 304 according to the direction of the guide hole on the base to puncture the capsule.

[0030] The spring 5 is sandwiched between the puncture needle push button 6 and the base 3 , and a limiting structure is provided at the sandwiching position. The spring 5 applies an elastic force in the opposite direction of the base 3 to the puncture needle push button 6 .

[0031] 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 orientation or positional relationship are only for the convenience of describing the simplified description of 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 the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A single-dose dry powder inhaler, comprising: The base (3) is provided with a groove as a capsule storage position (304), guide holes are provided on both sides of the groove, and a plurality of air intake channels (303a, 303b) and a pair of latch slots (301a, 301b); the suction nozzle (2) is provided with an air channel (205) inside, the central opening of the lower end is made into a mesh structure as a filter (204), and further comprises a pair of latch structures (201a, 201b); the needle push button (6) is provided on both sides of the base (3) and can move toward the capsule storage position (304); the needle (4) is fixed on the needle push button (6), and the tip of the needle (4) can be moved through The guide hole extends into the capsule compartment (304) of the base (3); a spring (5) has one end fixed to the puncture needle push button (6) and surrounds the puncture needle (4), and the other end is sleeved on the base (3); an upper cover (1) is detachably connected to the base (3) and can completely cover the suction nozzle (2) and the upper part of the base (3); it is characterized in that the latch structure (201a, 201b) on the suction nozzle (2) cooperates with the latch slot (301a, 301b) on the base (3) to form a latch connection, so that the suction nozzle (2) can be detachably connected to the base (3).

2. The single-dose dry powder inhaler according to claim 1, characterized in that: The latch pin slots (301a, 301b) are three-sided enclosed structures.

3. The single-dose dry powder inhaler according to claim 2, characterized in that: The nozzle latch pins (201a, 201b) are provided with nozzle latch pin protrusions (202), and the base latch pin slots (301a, 301b) are provided with base latch pin protrusions (302), and the two protrusions can be snap-fitted.

4. The single-dose dry powder inhaler according to claim 1, characterized in that: The suction nozzle (2) is provided with an indication mark (203), the shape of which specifies the opening direction of the suction nozzle and is a convex structure.

5. The single-dose dry powder inhaler according to claim 1, characterized in that: The nozzle latch pins (201a, 201b) and the base latch pin slots (301a, 301b) are symmetrical relative to the central axis of the base (3).

6. The single-dose dry powder inhaler according to claim 1, characterized in that: The upper cover (1) is provided with a plane as a finger contact surface (101), and the contact surface (101) is located at the golden section position when the entire device is in a closed state, that is, the ratio of the total length of the contact surface to the total height length of the entire device in a closed state is 0.618:1.

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