An inhaler of simple construction

Abstract

The application discloses a simple structure inhaler, which comprises a main body, a needle, a driving part, and a guiding structure. The main body is internally formed with a medicine bin for placing a medicine carrier. One end of the needle is a needle tip, and the other end is provided with a matching structure. The needle is movably arranged in the main body. The driving part is movably arranged relative to the main body. The driving part can move linearly relative to the main body along a first direction perpendicular to the axis of the needle tip. The driving part is provided with the guiding structure. The guiding structure comprises a guiding section one and a guiding section two connected with the guiding section one. In the direction opposite to the first direction, the guiding section one has an extension direction gradually close to the medicine bin in the axial direction of the needle tip, and the guiding section two has an extension direction gradually away from the medicine bin in the axial direction of the needle tip. When the driving part moves along the first direction, the guiding section one and the guiding section two pass through the matching structure in sequence. The guiding section one drives the needle tip to perform a puncture action through the matching structure. The guiding section two drives the needle tip to perform a needle withdrawal action through the matching structure. The application is convenient for production.

Description

Technical Field

[0001] This application relates to the field of medical inhaler technology, specifically to an inhaler with a simple structure. Background Technology

[0002] Inhalers are designed in various ways, including reservoir-type, vesicle-type, and capsule-type. Currently, most inhalers are reusable, allowing for drug inhalation and reuse by replacing the capsule or other drug carrier within the inhaler. In traditional reusable inhalers, the user presses a button to insert a needle into the capsule or other drug carrier. The needle then springs out of the inhaler, allowing the medication to be inhaled through the needle's opening. The spring, acting as the power source for needle retraction, requires a structure within the inhaler to secure it. Reusable inhalers, due to their reusability, have higher requirements for internal structure and structural stability, resulting in greater structural complexity and higher manufacturing costs.

[0003] However, for certain therapeutic applications, such as using inhalers to deliver influenza vaccines directly to the respiratory tract to rapidly stimulate an immune response and enable the body to fully combat the influenza virus, the inhaler cannot be reused after use due to microorganisms and other factors; it should only be used as a single-use product. If a reusable inhaler is used for inhaling vaccines or other medications, the user should discard the reusable inhaler after inhaling the medication, which would increase the user's cost. Summary of the Invention

[0004] In order to reduce the complexity of the internal structure of the inhaler, reduce the manufacturing cost of the inhaler, reduce the user's usage cost, and avoid the need for repeated use of the inhaler, this application provides an inhaler with a simple structure.

[0005] A simple inhaler includes: a main body having a drug compartment for holding a drug carrier; a needle with a needle tip at one end and a mating structure at the other end, the needle being movably mounted on the main body, the needle tip being capable of piercing the drug carrier along its axial direction or retracting from the drug carrier along its axial direction; and an active member disposed outside the drug compartment and movably mounted relative to the main body, the active member being capable of moving relative to the main body in a first direction perpendicular to the axial direction of the needle tip, the active member having a guide structure coupled to the mating structure, the guide structure including a guide segment one and a guide segment two connected to the guide segment one along the straight direction of the first direction, and in the opposite direction to the first direction, the guide segment one extending towards the drug compartment in the axial direction of the needle tip, and the guide segment two extending away from the drug compartment in the axial direction of the needle tip; when the active member moves along the first direction, the guide segment one and the guide segment two pass through the mating structure in sequence, the guide segment one driving the needle tip to perform the piercing action through the mating structure, and the guide segment two driving the needle tip to perform the retracting action through the mating structure.

[0006] The user can drive the active component to move along the first direction, so that the first and second guide sections of the guide structure pass through the mating structure in sequence. As a result, due to the change in the distance between the contact point between the guide structure and the mating mechanism and the drug cartridge, the guide structure drives the needle to perform the puncture and withdrawal actions through the mating structure. This application only requires the main body containing the drug carrier, the needle, and the active component that drives the needle to move to complete the puncture of the drug carrier and realize the release of the drug. Unlike traditional inhalers, it does not require an internal spring as the power source for the needle withdrawal operation and a structure for fixing the spring to realize the needle withdrawal operation. The inhaler mentioned in this application has a simple structure and reliable operation.

[0007] In one embodiment of this application, the guiding structure is a guide groove; the mating structure includes a circular roller pivotally connected to the needle, the axis of the circular roller being perpendicular to the axis of the needle tip and perpendicular to the motion plane of the guide groove relative to the main body, and the diameter of the circular roller being smaller than the distance between the two groove walls of the guide groove on the axis of the needle tip.

[0008] In one embodiment of this application, the guide structure is a guide groove; the mating structure is disposed in the guide groove, and the mating structure slides and rubs against the guide groove.

[0009] In one embodiment of this application, the mating structure has two mating parts spaced apart. The guide structure passes through the gap between the two mating parts and runs along the axial direction of the needle tip. The two mating parts are located on both sides of the guide structure. When the active member moves along the first direction, the guide structure can drive the needle tip to perform a piercing action or a needle retraction action through the two mating parts.

[0010] In one embodiment of this application, the active member moves in a straight line along a first direction and has an initial position and a disengagement position on the motion path; when the active member is in the initial position, the mating structure is connected to the guide structure; when the active member moves from the initial position to the disengagement position along the first direction, guide segment one and guide segment two pass through the mating structure in sequence; when the active member reaches the disengagement position, the guide structure separates from the mating structure.

[0011] In one embodiment of this application, the main body is provided with a working channel and a connecting hole connecting the working channel and the drug chamber; the mating structure is connected to the guide structure in the working channel, and the needle tip can enter and exit the drug chamber through the connecting hole to perform a puncture action or a needle retraction action. The diameter of the needle tip is not greater than the inner diameter of the connecting hole; when the active member reaches the disengagement position, the guide structure separates from the mating structure, and the needle tip can disengage from the connecting hole and enter the working channel.

[0012] By separating the guiding structure from the cooperating structure and inserting the needle tip into the working channel, the possibility of users reusing the inhaler is avoided, thus cutting off the possibility of biological contamination at the source.

[0013] In one embodiment of this application, the first direction is a straight line direction perpendicular to the axial direction of the needle tip; or, the first direction is the direction in which the rotating member rotates about a rotation axis, and the rotation axis of the first direction is parallel to the axial direction of the needle tip.

[0014] In one embodiment of this application, the main body includes a storage cylinder and a nozzle; the storage cylinder has a drug compartment; the nozzle has a filter element in its internal channel, which divides the internal channel of the nozzle into an intake section and a connecting section, and the connecting section is inserted into the storage cylinder.

[0015] In one embodiment of this application, the side wall of the storage cylinder is provided with a first air passage communicating with the medicine compartment; the side wall of the connecting section is provided with a second air passage; the connecting section and the storage cylinder are coaxially arranged and plugged into each other, and the first air passage and the second air passage are connected to form an air inlet passage communicating with the medicine compartment and the outside; the air inlet passage is arranged at an angle relative to the radial direction of the storage cylinder in the cross-section of the storage cylinder.

[0016] In one embodiment of this application, a positioning guide structure is further provided between the storage cylinder and the connecting section. The guide structure includes a positioning guide channel extending along the axial direction of the storage cylinder and a positioning guide portion capable of being inserted into the positioning guide channel. When the storage cylinder is inserted into the connecting section, one of the positioning guide channel and the positioning guide portion is located on the outer side wall of the storage cylinder, and the other is located on the inner side wall of the connecting section; or, when the connecting section is inserted into the storage cylinder, one of the positioning guide channel and the positioning guide portion is located on the inner side wall of the storage cylinder, and the other is located on the outer side wall of the connecting section. When the storage cylinder and the connecting section are inserted and mated, the positioning guide portion is inserted into the positioning guide channel along the axial direction of the storage cylinder, restricting the movement of the connecting section relative to the storage cylinder around its axis. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic structural diagram of one embodiment of the present application; Figure 2 This is a schematic diagram illustrating one embodiment of the main body and active component in this application; Figure 3 This is a schematic diagram of a structural embodiment of the needle in this application that is equipped with a circular roller; Figure 4 This is a schematic diagram of a possible embodiment of the active component in this application when it is in the initial position; Figure 5 This is a schematic diagram of one embodiment of the guide segment in this application when it is fitted with a structure. Figure 6 This is a schematic diagram illustrating one embodiment of the piercing action performed by the needle in this application; Figure 7 This is a schematic diagram of one embodiment of the guide segment two in this application when it is fitted with a structure; Figure 8 This is a schematic diagram of one embodiment of the guide structure in this application when the end of the guide structure passes through the mating structure; Figure 9 This is a schematic diagram of one embodiment of the guiding structure in this application when it is a guide rail; Figure 10 This is a schematic diagram illustrating one embodiment of the guide rail and the needle in this application. Figure 11This is a schematic diagram of one embodiment of the active component in this application when it is equipped with two guide rails; Figure 12 This is a schematic diagram illustrating one embodiment of the mating structure and the two guide rails in this application. Figure 13 This is a schematic diagram of one embodiment of the mating structure in this application, in which two circular rollers mate with a guide rail. Figure 14 This is a schematic diagram of one embodiment of the guide structure and the mating structure in this application when they are separated; Figure 15 This is a schematic structural diagram of one embodiment of the storage cylinder in this application; Figure 16 This is a schematic diagram illustrating one embodiment of the suction nozzle in this application when it is fitted onto the storage cylinder; Figure 17 This is a schematic diagram of a possible embodiment of the first and second airways in this application when they are connected. Figure 18 This is a schematic diagram of a possible embodiment in which the axis of the drug compartment is perpendicular to the axis of the storage cylinder. Figure 19 This is a schematic diagram of one embodiment of the suction nozzle in this application, in which needles are provided on both sides. Figure 20 Figure (a) is a schematic structural diagram of one embodiment of the present application when the first direction is the circumferential direction; Figure 20 Figure (b) is a schematic diagram of a structural embodiment in which the needle has a mating structure when the first direction is the circumferential direction in this application; Figure 20 Figure (c) is a schematic structural diagram of an embodiment in which the first direction is the circumferential direction and the guide rail has an extension direction along the first direction. Figure 20 Figure (d) is a schematic structural diagram of one embodiment of the present application in which the guide segment drives the needle to perform a piercing action when the first direction is the circumferential direction.

[0018] Label Explanation: 101. Main body; 102. Drug compartment; 103. Connecting hole; 104. Working channel; 105. Storage cylinder; 106. First air passage; 107. Insert strip; 108. Air inlet; 201. Needle; 202. Needle tip; 203. Circular roller; 204. Matching rod; 301. Driving component; 302. Guide groove; 303. Guide section one; 304. Guide section two; 305. Guide rail; 306. First abutment surface; 307. Second abutment surface; 308. Rotating shaft; 401. Nozzle; 402. Filter; 403. Inhalation section; 404. Connecting section; 405. Second airway; 406. Slot. Detailed Implementation

[0019] To provide a clearer understanding of the technical features, objectives, and effects of this application, specific embodiments of this application are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0020] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0021] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, to make the drawings concise and easy to understand, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled.

[0022] The "fixed connection" between the two components in this application is achieved through methods such as integral manufacturing, threaded connection, snap-fit, welding, and bonding, so that the relative position between the two components does not change or rotate relative to each other during use.

[0023] The movement configuration of one component relative to another component in this application enables the two components to slide relative to each other along a preset path, or enables one component to move relative to another component by means of the rolling of a rolling element.

[0024] Please see Figures 1 to 20 Learn more about this application.

[0025] See Figures 1 to 3 The simple inhaler includes a main body 101, a needle 201 connected to the main body 101, and a mouthpiece 401.

[0026] The main body 101 has a drug compartment 102 inside to accommodate capsules or other drug carriers, and the main body 101 is equipped with a needle 201 that can enter and exit the drug compartment 102. See Figure 1One end of the needle 201 is the needle tip 202. The medicine container 102 is provided with a connecting hole 103. The needle tip 202 and the connecting hole 103 are axially parallel, and the needle tip 202 can enter and exit the medicine container 102 along the connecting hole 103. The needle tip 202 can enter the medicine container 102 to perform a piercing action, piercing the medicine carrier inside the medicine container 102. Then, the needle tip 202 performs a needle withdrawal action, withdrawing from the medicine carrier. The medicine in the medicine carrier can enter the medicine container 102 through the hole pierced by the needle 201 in the medicine carrier. The inhaler has an airway connecting the medication compartment 102 to the outside. The mouthpiece 401 is connected to the medication compartment 102. When the user inhales the medication in the medication compartment 102 through the mouthpiece 401, a negative pressure is generated at the mouthpiece 401. Outside air enters the medication compartment 102 through the airway. The high-speed airflow shakes the powder in the medication carrier out of the medication compartment 102. The air carries the medication in the medication compartment 102 to the mouthpiece 401, where the medication enters the user's body along with the air.

[0027] Preferably, when the inhaler is not in use, the needle tip 202 is completely not inserted into the medication compartment 102. This prevents the medication carrier from being punctured prematurely due to bumps or other factors during inhaler transport, thus avoiding medication leakage and waste. Of course, when the user inhales the medication powder, the needle tip 202 should also be completely withdrawn from the medication compartment 102 through the connecting hole 103 during the needle withdrawal action. This prevents motion interference between the needle tip 202 and the medication carrier, which is vibrating due to airflow, thus avoiding excessive medication powder residue within the medication carrier.

[0028] The needle 201 has a needle tip 202 for piercing the drug carrier. The needle 201 is slidably or rollingly connected to the body 101, and the needle 201 is axially movable on the body 101 along the needle tip 202. See also Figure 1The needle 201 has a needle tip 202, and the medicine chamber has a connecting hole 103 parallel to the axial direction of the needle tip 202. The inner diameter of the connecting hole 103 is not less than the outer diameter of the needle tip 202. The two needle tips 202 are respectively inserted into the two connecting holes 103 and are slidably connected with the connecting holes 103. Of course, a rotatable rolling element can also be provided between the side wall of the connecting hole 103 and the needle tip 202 to reduce the friction between the needle tip 202 and the side wall of the connecting hole 103. For example, a linear bearing can be provided between the side wall of the connecting hole 103 and the needle tip 202. The needle tip 202 can pass through the linear bearing and move relative to the connecting hole 103 in the axial direction of the needle tip 202, thereby realizing the movement of the needle 201 relative to the main body 101 in the axial direction of the needle tip 202. During this process, the sidewall of the connecting hole 103 guides the movement of the needle tip 202. Of course, those skilled in the art to which this application pertains can understand that the movement of the needle 201 relative to the main body 101 in the axial direction of the needle tip 202 can also be achieved by other connection methods. For example, the needle 201 is provided with a needle tip 202 and a needle 201 rod. The needle tip 202 is located at one end of the needle 201 rod, and the other end of the needle 201 rod is inserted into the guide hole of the main body 101 and slidably connected with the guide hole. The needle 201 rod can reciprocate in the axial direction of the needle tip 202 along the axis of the guide hole in the guide hole, so that the needle 201 has the stroke to perform the piercing action and the needle withdrawal action. Of course, those skilled in the art to which this application pertains will understand that the embodiment in which the needle 201 is axially movable on the main body 101 along the needle tip 202 can also have other forms, such as a slider on the side wall of the needle 201 rod, and a groove in the main body 101 along the axial direction of the needle tip 202 that cooperates with the slider. The needle 201 is connected to the main body 101 through a slider-groove guide rail structure composed of the slider and the groove. Through the above-described connecting hole 103, guide hole, and groove structure on the main body 101, the needle 201 performing the piercing action or the needle retraction action can be guided so that the needle 201 moves in a preset direction and path. Of course, there are other implementation methods to connect the needle 201 and the main body 101. The needle 201 moves axially relative to the main body 101 at the needle tip 202 to perform piercing and retraction actions. These will not be elaborated here. The needle 201 can move axially relative to the main body 101 along the needle tip 202, and the needle tip 202 of the needle 201 can perform piercing and retraction actions.

[0029] This application improves the structure that drives the movement of the needle tip 202, which is described in detail below.

[0030] The simple inhaler also includes an active component 301, which is located outside the drug chamber 102 and is movably disposed on the main body 101. The active component 301 can move linearly relative to the main body 101 in a first direction perpendicular to the axial direction of the needle tip.

[0031] One end of the puncture needle 201 is the puncture needle tip 202, and the other end is provided with a mating structure. The puncture needle 201 is movably disposed on the main body 101, and the puncture needle 201 can move along the axial direction of the puncture needle tip 202 to perform puncture and retraction actions.

[0032] The active component 301 is provided with a guide structure coupled to the mating structure. The guide structure includes a first guide segment 303 and a second guide segment 304 connected to the first guide segment 303. The connection between the first guide segment 303 and the second guide segment 304 has a smooth transition. Along a direction opposite to the first direction, the first guide segment 303 extends axially toward the drug reservoir 102 at the needle tip, while the second guide segment 304 extends axially away from the drug reservoir 102 at the needle tip. When the active component 301 moves along the first direction, the first guide segment 303 and the second guide segment 304 pass through the mating structure in sequence. Along the opposite direction to the first direction, the guide segment 303 extends towards the drug chamber 102 in the axial direction of the needle tip. As the active member 301 moves along the first direction, the distance between the guide segment 303 and the drug chamber 102 in the axial direction of the needle tip gradually decreases at the mating structure. The guide segment 303 gradually pushes the needle tip 202 into the drug chamber 102 through the mating structure to perform the puncture action until the end of the guide segment 303 reaches the mating structure. The guide segment 303 then stops pushing the needle tip 202 into the drug chamber 102, thus completing the puncture action. Since the guide segment 2 304 extends away from the drug reservoir 102 in the axial direction of the needle tip along the opposite direction to the first direction, the active member 301 continues to move in the first direction. The guide segment 2 304, which is connected to the end of the guide segment 1 303, begins to connect with the mating structure. The distance between the guide segment 2 304 and the drug reservoir 102 in the axial direction of the needle tip gradually increases. As a result, the mating structure connected to the guide segment 2 304 is gradually pulled away from the drug reservoir 102 by the guide segment 2 304. The needle tip 202 performs a needle withdrawal action, allowing the needle tip 202 to exit the capsule or other drug carrier. Finally, the needle tip 202 completes the needle withdrawal action under the action of the guide segment 2 304.

[0033] The structure that drives the movement of the needle tip 202 will be described in detail below with reference to the accompanying drawings.

[0034] See Figure 1 The needle tip 202 is slidably disposed in the connecting hole 103, allowing it to enter and exit the medicine chamber 102 along the connecting hole 103. (See also...) Figure 1 , Figure 2The main body 101 has a working channel 104 extending perpendicular to the axial direction of the needle tip. One end of the working channel 104 is connected to the outside. The active member 301 is inserted into the working channel 104 from the outside and is slidably connected to the working channel 104. When the active member 301 is in the initial position, it is located inside the working channel 104. When it is necessary to use the active member 301 to drive the needle 201 to perform piercing and retraction actions, the active member 301 is pulled outward from inside the working channel 104 along the first direction. This results in the active member 301 having a guide section 1 303 and a guide section 2 304, which are sequentially connected through a mating structure. With the active member 301 located inside the working channel 104, the working channel 104 can protect the active member 301, preventing external factors from accidentally touching it and ensuring the movement of the active member 301. Of course, those skilled in the art will understand that the way to drive the active member 301 is not limited to... Figure 1 The pulling method shown can also be a pushing method for the active component 301. Manufacturers can adapt the design of the connection between the working channel 104 and the outside world, as well as the placement of guide section one 303 and guide section two 304, according to the user's needs for driving the active component 301. (See [reference]). Figure 1 , Figure 2 , Figure 4 ,by Figure 4 The directions described are as follows: the rightward direction is the first direction. A handle is provided at the right end of the driving member 301, allowing the user to hold the main body 101 with one hand and pull the driving member 301 with the other hand via the handle, causing the driving member 301 to move to the right (first direction) relative to the main body 101. The handle can also be located at the left end of the driving member 301 (not shown in the figure). The handle extends from the left end of the working channel 104 to the outside, allowing the user to press the driving member 301 to move it to the right (first direction), thus causing guide section one 303 and guide section two 304 to pass sequentially through the mating structure. Of course, there are other specific structures to achieve pulling or pushing of the active component 301. For example, the main body 101 is provided with a T-shaped guide rail, and the active component 301 is slidably or rollingly connected to the main body 101 through the T-shaped guide rail to achieve movement relative to the main body 101 in the first direction. Of course, there are other ways to achieve movement of the active component 301 relative to the main body 101, which will not be elaborated here. As long as the active component 301 can move relative to the main body 101, the guide section 1 303 and guide section 2 304 can pass through the matching structure in sequence to achieve the piercing action and needle withdrawal action of the needle tip 202.

[0035] See Figures 1 to 4In one embodiment of this application, the active component 301 is provided with a guide groove 302. The guide groove 302 extends in the plane where the first direction and the axial direction of the needle tip 202 are located, and in the opposite direction of the first direction, it is provided with a guide section 303 and a guide section 304 communicating with the guide section 303. The groove wall of the guide groove 302 includes a first abutment surface 306 and a second abutment surface 307 that are arranged opposite to each other in the axial direction of the needle tip. The second abutment surface 307 is closer to the drug chamber 102 than the first abutment surface 306.

[0036] See Figures 4 to 6 The guide groove 302 moves relative to the circular roller 203 in a first direction. Within the first guide section 303, along the direction opposite to the first direction, the first abutting surface 306 gradually approaches the medicine chamber 102. The first abutting surface 306 causes the first guide section 303 to have an extension direction that gradually approaches the medicine chamber 102. Within the second guide section 304, along the direction opposite to the first direction, the second abutting surface 307 gradually moves away from the medicine chamber 102. The second abutting surface 307 causes the second guide section 304 to have an extension direction that gradually moves away from the medicine chamber 102.

[0037] See Figure 1 , Figure 3 The mating structure includes a circular roller 203 pivotally connected to the needle 201. The axial direction of the circular roller 203 is perpendicular to the axial direction of the needle tip 202, perpendicular to the first direction, and perpendicular to the motion plane of the guide groove 302 relative to the main body 101 and the motion plane of the driving member 301. The diameter of the circular roller 203 is smaller than the distance between the two groove walls (first abutment surface 306 and second abutment surface 307) of the guide groove 302 in the axial direction of the needle tip. When the circular roller 203 is inserted into the guide groove 302, it can rotate around its own axis within the guide groove 302.

[0038] See Figures 4 to 6 When the driving member 301 moves relative to the main body 101 in the first direction, the first abutting surface 306 pushes the roller 203 to gradually approach the drug chamber 102 along the axial direction of the needle tip, causing the needle tip 202 to perform a piercing action until the end of the guide section 303 reaches the roller 203 of the mating structure. The first abutting surface 306 can reach the closest point to the drug chamber 102 at the roller 203, and the first abutting surface 306 drives the needle tip 202 to complete the piercing action through the roller 203. As the driving member 301 continues to move in the first direction, the guide groove 302 in contact with the roller 203 changes from guide section 303 to guide section 304. (See [reference]). Figures 6 to 8As the second abutment surface 307 moves away from the drug chamber 102 in the axial direction of the needle tip along the opposite direction to the first direction, the distance between the second abutment surface 307 at the roller 203 and the drug chamber 102 in the axial direction of the needle tip gradually increases as the active member 301 moves along the first direction. As a result, the second abutment surface 307 of the guide section 2 304 abuts against the roller 203, and the roller 203 drives the needle 201 away from the drug chamber 102, thereby causing the needle tip 202 to perform a needle retraction action.

[0039] During the movement of the active component 301 along the first direction, since the roller 203 can rotate around its own axis, when the active component 301 moves relative to the main body 101 along the first direction, the first abutment surface 306 pushes the needle tip 202 through the roller 203 to perform the piercing action, and the second abutment surface 307 pulls the needle tip 202 through the roller 203 to perform the needle retraction action, the roller 203 can rotate, so that rolling friction is generated between the roller 203 and the first abutment surface 306 and the second abutment surface 307, so that the guide groove 302 can move more smoothly relative to the structure, reducing the resistance when the active component 301 moves along the first direction.

[0040] Furthermore, within the guide section 303, in a direction opposite to the first direction, the second abutment surface 307 is parallel to the first abutment surface 306, so that the distance between the second abutment surface 307 and the first abutment surface 306 is equal everywhere within the guide section. The second abutment surface 307 has a limiting effect on the roller 203. The second abutment surface 307 can restrict the roller 203 from accidentally moving towards the drug chamber 102 due to factors such as vibration, and avoid the situation of accidentally puncturing the drug carrier in the drug chamber 102.

[0041] The user can drive the active component 301 to move along a first direction, causing the guide section 303 and guide section 304 of the guide structure to pass sequentially through the mating structure. Due to the change in distance between the contact point between the guide structure and the mating mechanism and the drug container 102, the guide structure drives the needle 201 to perform puncture and withdrawal actions through the mating structure. This application only requires the main body 101 containing the drug carrier, the needle 201, and the active component 301 to drive the needle 201 to puncture the drug carrier and release the drug. Unlike traditional inhalers, it does not require an internal spring as the power source for needle withdrawal and a structure to fix the spring. The inhaler described in this application has a simple structure and reliable operation.

[0042] Of course, those skilled in the art to which this application pertains will understand that the roller 203 may not be provided in the above-mentioned mating structure for cooperating with the guide groove 302, and the mating structure may also be other structural forms. For example, in one embodiment of this application, the mating structure is a rod with its axis perpendicular to the first direction and the axial direction of the needle tip, and fixedly connected to the needle 201. The mating structure is inserted into the guide groove 302. When the active member 301 moves relative to the main body 101 in the first direction, the mating structure can first slide and rub against the first abutment surface 306 in the first guide section 303. The first abutment surface 306 pushes the needle 201 to perform a piercing action through the mating structure. Then, it slides and rubs against the second abutment surface 307 in the second guide section 304. The needle 201 performs a needle retraction action under the pull of the second abutment surface 307.

[0043] Further, see Figure 2 , Figure 3 The active component 301 has two mirror-shaped guide grooves 302, which are spaced apart in a direction perpendicular to the first direction and the axial direction of the needle tip. The mating structure is located between the two guide grooves 302. Compared to the method of setting one guide groove 302 on only one side of the mating structure, setting one guide groove 302 on each side of the mating structure can reduce the rotational torque of the mating structure in the direction perpendicular to the first direction and the axial direction of the needle tip. This avoids the needle 201 from being stuck due to uneven force, which would cause excessive friction between the needle 201 and the connecting hole 103, preventing the needle 201 from performing the piercing or retraction action.

[0044] Those skilled in the art to which this application pertains will understand that the guiding structure in this application is not limited to the form of guide groove 302, but can also be in other forms, see [link to relevant documentation]. Figures 9 to 13 In one embodiment of this application, the guiding structure is a solid guide rail 305. The guide rail 305 includes a first abutment surface 306 and a second abutment surface 307. The first abutment surface 306 and the second abutment surface 307 are arranged opposite each other in the axial direction of the needle tip, with the first abutment surface 306 being closer to the drug reservoir 102 than the second abutment surface 307. The guide rail 305 includes a first guide section 303 and a second guide section 304 along its extension direction. In the direction opposite to the first direction, the first abutment surface 306 and the second abutment surface 307 of the first guide section 303 both have an extension direction that gradually approaches the drug reservoir 102 in the axial direction of the needle tip, while the first abutment surface 306 and the second abutment surface 307 of the second guide section 304 both have an extension direction that gradually moves away from the drug reservoir 102 in the axial direction of the needle tip.

[0045] When the guiding structure exists in the form of a guide rail, the mating structure will be adjusted accordingly. See also Figures 9 to 13The mating structure has two mating parts spaced axially at the tip of the needle. The form of the mating parts can be... Figures 9 to 12 The rod-shaped structure shown can also be Figure 13 The roller 203 shown is capable of rotating around its own axis. Of course, the mating part can also have other shapes and structures, which will not be described in detail here. The extension direction of the mating part is perpendicular to the axis of the needle tip 202 and the first direction. Here, the two mating parts are named the first mating part and the second mating part. The first mating part is closer to the medicine tank 102 in the axial direction of the needle tip than the second mating part.

[0046] The guide rail 305 passes through the gap between the two mating parts, so that the first abutting surface 306 can abut against the first mating part and the second abutting surface 307 can abut against the second mating part. When the driving member 301 moves along the first direction, the guide section 303 moves relative to the two mating parts. The first abutting surface 306 abuts against the first mating part. As the driving member 301 moves along the first direction, the first abutting surface 306 gradually approaches the medicine chamber 102 at the needle 201. The first abutting surface 306 applies a pushing force to the first mating part, causing the first mating part to approach the medicine chamber 102 along the needle tip axis. Thus, the first abutting surface 306 pushes the needle tip 202 to perform a piercing action. As the driving member 301 continues to move along the first direction, the guide section 304 enters between the two mating parts. The guide section 304 begins to enter between the two mating parts at a point that is farther away from the medicine chamber 102 along the needle tip axis. Thus, the second abutting surface 307 pulls the second mating part away from the medicine chamber 102 along the needle tip axis. Thus, the needle tip 202 performs a needle retraction action.

[0047] Furthermore, for better explanation of this application, the direction parallel to the first direction is defined as the length direction, the direction parallel to the axial direction of the needle tip is defined as the height direction, and the direction perpendicular to both the first direction and the axial direction of the needle tip is defined as the width direction. See also Figure 9 The inhaler has two needle tips 202 along its width. The guide rail 305 is positioned at the midpoint of the two needle tips 202 along its width. This guide rail 305 allows both sides of the mating structure to move simultaneously and in the same direction along the needle tips 202. It can stably provide a force parallel to the needle tip axis to the two needle tips 202, piercing the drug carrier or extracting it from the drug carrier. This avoids uneven force on both sides of the mating structure along its width and prevents the needle tips 202 from being jammed by the connecting hole 103 or other structures due to the rotational torque generated by the mating mechanism, thus preventing the needle tips 202 from moving along their axial direction. Of course, there are other ways to implement the above structure; see [link to relevant documentation]. Figure 11 , Figure 12The active component 301 is provided with two guide rails 305, which are spaced apart along the width direction. A first mating part and a second mating part are respectively provided on both sides of the mating structure. The first mating part and the second mating part in each group are connected to a guide rail 305. The two guide rails 305 can apply force to both sides of the mating structure simultaneously, so that the needle tip 202 can stably perform the needle 201 action or the needle retraction action.

[0048] In one embodiment of this application, the active member 301 has an initial position and a disengaged position along a linear motion path formed by the motion of the active member 301 in a first direction; see also Figure 4 When the active component 301 is in the initial position, the mating structure is connected to the guide structure. As the active component 301 moves from the initial position to the disengaged position along the first direction, guide segment 303 and guide segment 304 pass through the mating structure in sequence. After guide segment 304 passes through the mating structure, the end of the guide structure gradually approaches the mating structure. Further details can be found in [link to further details]. Figure 8 , Figure 14 When the guiding structure is a guide groove 302, the end of the guide groove 302 is not provided with a limiting structure, and the end of the guide groove 302 is an open structure communicating with the outside. As the active member 301 moves along the first direction, the roller 203 or rod-shaped member in the mating structure can leave the guide groove 302 through the end of the guide groove 302, realizing the separation of the mating structure and the guiding structure; see also Figure 10 When the guiding structure is a guide rail 305, the end of the guide rail 305 does not have a limiting structure with a size larger than the distance between the two mating parts. As the driving member 301 moves along the first direction, the two mating parts of the mating structure can disengage from the guide rail 305 via the end of the guide rail 305, thus achieving the separation of the mating structure and the guiding structure; therefore, see Figure 14 When the active component 301 moves to the disengaged position relative to the main body 101, the mating structure and the guiding structure can separate. The active component 301 no longer controls the position of the needle 201 through the guiding structure and the mating structure. The needle 201 can move into the working channel 104 along the axial direction of the needle tip 202. At this time, the user cannot make the needle tip 202 perform the piercing action and needle withdrawal action again through the active component 301, so that the inhaler can only be used once. This avoids the possibility of biological contamination caused by refilling the inhaler with the drug carrier or reusing the inhaler when using the inhaler to inhale special drugs such as vaccines.

[0049] Further, see Figure 14Since the main body 101 is provided with a working channel 104 extending perpendicular to the axial direction of the needle tip, the active member 301 is inserted into the working channel 104 and slidably connected to the working channel 104. When the inhaler is not in use, the active member 301 is located in the working channel 104 and occupies the space in the working channel 104. The needle 201 is connected to the working channel 104. When the active member 301 applies a force to the needle 201, the working channel 104 can provide the active member 301 with a force that counteracts the force of the needle 201 on the active member 301 in the axial direction of the needle tip, ensuring that the operator only needs to apply a force in the first direction to make the active member 301 move smoothly relative to the main body 101 in the first direction.

[0050] Furthermore, the mating structure connects to the guide structure within the working channel 104, allowing the needle tip 202 to enter and exit the drug chamber 102 through the connecting hole 103 to perform a puncture or retraction action. The diameter of the needle tip 202 is no greater than the inner diameter of the connecting hole 103, allowing the needle tip 202 to move freely along the connecting hole 103. When the driving member 301 reaches the disengagement position, the guide structure separates from the mating structure, and the needle tip 202, guided by the second guide section 304, is completely pulled from the connecting hole 103 into the working channel 104 by the second abutment surface 307. Alternatively, after the guide structure separates from the mating structure, the needle tip 202 completely detaches from the connecting hole 103 under the influence of gravity. As the active component 301 moves along the first direction, it gradually moves away from the working channel 104. The working channel 104 has sufficient space to accommodate the needle 201, allowing the needle tip 202 to pierce the drug carrier, detach from the connecting hole 103, and enter the working channel 104. Furthermore, since the needle tip 202 is detached from the connecting hole 103, it is in a disordered state. Even if the active component 301 moves directly in the opposite direction to the first direction, the likelihood of the needle tip 202 re-entering the connecting hole 103 is extremely low, thus preventing the inhaler from being reused.

[0051] In one embodiment of this application, the simple inhaler further includes a mouthpiece 401 and a filter 402. The mouthpiece 401 has an internal channel along the axial direction, and the filter 402 is disposed in the internal channel of the mouthpiece 401. The filter 402 can be a screen made of medical plastic or stainless steel. The filter 402 is fixedly connected to the mouthpiece 401 by means of snap-fit ​​or heat fusion connection.

[0052] See Figures 15 to 17In one embodiment of this application, the main body 101 includes a storage cylinder 105 and a suction nozzle 401. The storage cylinder 105 contains a medicine compartment. The suction nozzle 401 has an internal channel containing a filter element 402, which can be a screen made of medical plastic or stainless steel. The filter element 402 is fixedly connected to the suction nozzle 401 by snap-fit ​​or heat-fusion connection. The filter element 402 divides the internal channel of the suction nozzle 401 into a suction section 403 and a connecting section 404. The connecting section 404 is inserted into the storage cylinder 105. The inner diameter of the connecting section 404 is equal to the outer diameter of the storage cylinder 105. The suction nozzle 401 can be fitted onto the storage cylinder 105 through the connecting section 404, and then the connecting section 404 and the storage cylinder 105 are fixedly connected by heat fusion, bonding, snap-fit, etc., to preserve the medicine compartment. Alternatively, the outer diameter of the connecting section 404 can be equal to the inner diameter of the end of the storage cylinder 105, allowing the connecting section 404 to be inserted into the end of the storage cylinder 105. Of course, the storage cylinder 105 can also be connected to the connecting section 404 via a sleeve, as long as the connecting section 404 of the suction nozzle 401 and the storage cylinder 105 can be inserted and mated. During factory assembly, the drug carrier can be placed into the drug chamber provided in the storage cylinder 105 first. Then, the storage cylinder 105 is inserted into the connecting section 404. The filter element 402 partially seals the connection between the drug chamber and the outside. The drug carrier in the drug chamber cannot enter the outside through the filter holes of the filter element 402 and the suction nozzle 401, nor can it enter the main body 101 through the connecting hole 103. Therefore, the drug carrier is stored in the drug chamber according to the preset method. When the needle tip 202 performs the piercing action, the drug carrier in the drug chamber is limited by the inner wall of the drug chamber and the filter element 402 to prevent the drug carrier from excessively shifting when the needle tip 202 pierces the outer shell of the drug carrier, which would cause the needle tip 202 to fail to pierce the drug carrier. After the drug carrier is punctured by the needle tip 202, when the user inhales through the mouthpiece 401, the external airflow enters the drug chamber, carrying the drug into the body. During this process, the filter element 402 can retain any shell fragments that may be generated when the drug carrier is punctured within the drug chamber, preventing these fragments from being inhaled. The insertion and connection between the storage cylinder 105 and the connecting section 404 allows for easy placement of the drug carrier into the drug chamber during assembly, reducing assembly difficulty and improving production efficiency.

[0053] Furthermore, the storage cylinder 105 and the connecting section 404 can be fixedly connected by means of heat fusion, bonding, etc., to avoid the situation where the user separates the storage cylinder 105 and the connecting section 404 after the inhaler has been used once, and refills the medication carrier into the medication compartment for reuse.

[0054] Furthermore, a first air passage 106 is provided through the side wall of the storage cylinder 105, connecting the outside to the drug compartment; a second air passage 405 is provided through the side wall of the connecting section 404; the connecting section 404 and the storage cylinder 105 are coaxially arranged and plugged into each other, the first air passage 106 and the second air passage 405 are connected to form an air inlet 108 connecting the drug compartment to the outside. The air inlet 108 is angled relative to the radial direction of the storage cylinder 105 within its cross-section. Airflow from the outside enters the drug compartment through the air inlet 108, and under the guidance of the air inlet 108, it enters the drug compartment in an offset manner, enhancing the driving effect of the airflow on the drug carrier. This will be described in detail below with reference to the accompanying drawings.

[0055] See Figure 16 , Figure 17 The first airway 106 and the second airway 405 are connected to form the air inlet 108. When the drug carrier is placed in the drug chamber, the center of the drug carrier is located on the axis of the drug chamber and the storage cylinder 105. Since the air inlet 108 is not parallel to the radial direction of the storage cylinder 105, but is set at an angle to the radial direction of the storage cylinder 105, the extension direction of the air inlet 108 does not pass through the center of the drug carrier, but blows towards the drug carrier in an offset manner. The airflow entering the drug chamber from the outside through the air inlet 108 will exert a rotational force on the drug carrier, causing the drug carrier to rotate in the drug chamber, thereby increasing the degree of movement of the drug carrier, so that the drug can leave the drug carrier as much as possible and enter the drug chamber, reducing the drug residue in the drug carrier. When the drug carrier is a capsule, the long axis of the capsule is coaxial with the storage cylinder 105 and the connecting section 404, and the air inlet 108 is perpendicular to the long axis of the capsule and is set at an angle to the short axis of the capsule. When the user inhales through the mouthpiece 401, outside air flows through the air intake 108. Guided by the air intake 108, the air is biased and blown around the capsule, causing it to rotate around its long axis, thus allowing the medication to leave the capsule as much as possible. Of course, by changing the shape of the medication compartment, the capsule's short axis can also be coaxial with the axis of the storage cylinder 105, see [reference needed]. Figure 18 The capsule can be placed in the medicine chamber with its long axis perpendicular to the axis of the storage cylinder 105. When the external airflow enters the medicine chamber through the air inlet 108, the airflow drives the capsule to rotate around the short axis of the capsule in the medicine chamber, thereby reducing medicine residue.

[0056] Furthermore, the air intake duct 108 extends in a straight line direction that is at an angle to the radial direction of the storage cylinder 105 in the cross-section of the storage cylinder 105, ensuring that the external airflow can quickly enter the drug chamber and drive the drug carrier in the drug chamber to move.

[0057] To ensure accurate connection between the first air passage 106 and the second air passage 405, forming the air intake 108, see [reference needed]. Figure 15When the connecting section 404 and the storage cylinder 105 are inserted and fitted together, the length of the connecting section 404 is equal to that of the storage cylinder 105, thereby achieving axial limiting between the connecting section 404 and the storage cylinder 105 and ensuring that the projections of the first air passage 106 and the second air passage 405 on the axis of the storage cylinder 105 are at the same position. When the connecting section 404 is inserted into the storage cylinder 105, the outer diameter of the connecting section 404 is equal to the inner diameter of the storage cylinder 105, and when the storage cylinder 105 is inserted into the connecting section 404, the outer diameter of the storage cylinder 105 is equal to the inner diameter of the connecting section 404, thereby achieving radial limiting between the connecting section 404 and the storage cylinder 105 and enabling the first air passage 106 and the second air passage 405 to be tightly connected and communicate.

[0058] A positioning guide structure is also provided between the storage cylinder 105 and the connecting section 404. The guide structure includes a positioning guide channel extending along the axial direction of the storage cylinder 105 and a positioning guide part that can be inserted into the positioning guide channel. When the storage cylinder 105 is inserted into the connecting section 404, one of the positioning guide channel and the positioning guide block is located on the outer side wall of the storage cylinder 105, and the other is located on the inner side wall of the connecting section 404. Alternatively, the positioning guide block can be located on the inner side wall of the connecting section 404, and the positioning guide channel can be located on the outer side wall of the storage cylinder 105. When the connecting section 404 is inserted into the storage cylinder 105, one of the positioning guide channel and the positioning guide block is located on the inner side wall of the storage cylinder 105, and the other is located on the outer side wall of the connecting section 404. When the storage cylinder 105 and the connecting section 404 are inserted and engaged, the positioning guide part is inserted into the positioning guide channel along the axial direction of the storage cylinder 105, restricting the movement of the connecting section 404 relative to the storage cylinder 105 around the axis of the storage cylinder 105, thereby achieving circumferential positioning between the storage cylinder 105 and the connecting section 404. The following example illustrates the positioning guide structure when the storage cylinder 105 is inserted into the connecting section 404, and the outer diameter of the storage cylinder 105 is equal to the inner diameter of the connecting section 404.

[0059] See Figure 15 The positioning guide channel is located on the inner side wall of the connecting section 404. The positioning guide channel is a slot 406 that extends axially along the connecting section 404 and communicates with the lower end of the connecting section 404. The positioning guide block is an insert 107 that is located on the outer side wall of the storage cylinder 105 and extends axially along the storage cylinder 105. When the storage cylinder 105 is inserted into the connecting section 404, the lower end of the connecting section 404 is sleeved on the upper end of the storage cylinder 105. The insert 107 enters the slot 406 through the communication between the slot 406 and the lower end of the connecting section 404. The circumferential positional relationship between the storage cylinder 105 and the connecting section 404 is restricted by the slot 406 and the insert 107, thereby realizing the circumferential positioning between the storage cylinder 105 and the connecting section 404.

[0060] Through the axial, radial, and circumferential limiting of the connecting section 404 and the storage cylinder 105, the first air passage 106 and the second air passage 405 can be accurately aligned and connected to form the air intake passage 108, which facilitates assembly.

[0061] Those skilled in the art will understand that the axial direction of the needle tip 202 in this application is not limited to being parallel to the axis of the storage cylinder 105, but can also be perpendicular to the axis of the storage cylinder 105, and the number of needles 201 can be multiple, see [reference]. Figure 18 To achieve puncture on both sides of the drug carrier, the inhaler is equipped with two needles 201, and one needle 201 is located on each side of the drug chamber 102. Each needle 201 has a mating structure, see [link to details]. Figure 18 The needle 201 is provided with a mating structure of mating rod 204. Figure 18 The active component 301 is provided with two guide structures, which are guide grooves 302. The two guide structures are coupled with two mating structures respectively. When the active component 301 moves along the first direction, it can simultaneously drive the two guide structures to move relative to the mating structures provided with the two needles 201. Under the action of the first guide section 303 and the second guide section 304, the two needles 201 simultaneously perform piercing and retraction actions. The needle tips 202 of the two needles 201 can pierce both sides of the drug carrier, forming multiple holes on the outer shell of the drug carrier. This allows the drug to leave the drug carrier as much as possible when it is blown by the airflow, reducing the amount of drug residue in the drug carrier.

[0062] Those skilled in the art will understand that the first direction in this application is not limited to a straight line perpendicular to the axial direction of the needle tip 202, but can also be the direction in which the rotating component rotates around a rotation axis, with the rotation axis of the first direction parallel to the axial direction of the needle tip, or the first direction being a circumferential direction perpendicular to the axial direction of the needle tip 202. (See also...) Figure 20 .

[0063] See Figure 20In (a), the active member 301 is pivotally connected to the main body 101 via a rotating shaft 308. The axial direction of the rotating shaft 308 is parallel to the axial direction of the needle tip 202 and the rod of the needle 201. The first direction is the circumferential direction around the axis of the rotating shaft 308. The active mounting part of the active member 301 extends along the first direction, and the active member 301 can move around the axis of the rotating shaft 308 in the first direction. Those skilled in the art to which this application pertains will understand that there are various ways to realize the pivotal connection between the active member 301 and the main body 101 via the pivot 308. For example, the pivot 308 may be fixedly connected to the active member 301, or rotatably connected to the main body 101. The pivot 308 may be able to rotate around its own axis, and the active member 301 may rotate around the axis of the pivot 308 in a first direction. Alternatively, the pivot 308 may be fixedly connected to the main body 101, and the active member 301 may be rotatably connected to the pivot 308. The active member 301 may be able to rotate relative to the pivot 308 in a first direction around the axis of the pivot 308, changing the position of the active member 301 relative to the needle 201 in the first direction. Of course, there are other ways to realize the rotation of the active member 301 around the axis of the pivot 308, which will not be described in detail here.

[0064] See Figure 20 Examples of embodiments (a) and (b) are given by the implementation of the active component 301 having a guide rail 305 and the needle 201 having two mating rods 204 axially arranged at the needle tip 202. The guide rail 305 extends along a first direction and includes a first abutment surface 306 and a second abutment surface 307. The first abutment surface 306 and the second abutment surface 307 are arranged opposite each other axially at the needle tip 202, and the first abutment surface 306 is closer to the drug chamber 102 than the second abutment surface 307. The guide rail 305 includes a guide section 303 and a guide section 304 along its extension direction. In the direction opposite to the first direction, the first abutment surface 306 and the second abutment surface 307 of the guide section 303 both have an extension direction that gradually approaches the drug chamber 102 in the axial direction of the needle tip 202. The first abutment surface 306 and the second abutment surface 307 of the guide section 304 both have an extension direction that gradually moves away from the drug chamber 102 in the axial direction of the needle tip 202.

[0065] See Figure 20 In (c), the center of the guide rail 305 is located on the axis of the rotating shaft 308. When the driving member 301 rotates in the first direction, the first guide section 303 enters the space between the two mating rods 204 of the needle 201 before the second guide section 304. See [reference needed]. Figure 20In (a) and (d), the first abutting surface 306 of the guide section 303 pushes the needle 201 toward the medicine chamber 102 through the cooperating rod 204, and the needle 201 performs a piercing action; when the driving member 301 continues to rotate, the guide section 304 begins to enter between the two cooperating rods 204, and the second abutting surface 307 of the guide section 304 pulls the needle 201 along the axial direction of the needle tip 202 away from the medicine chamber 102 through the cooperating rod 204, so that the needle 201 performs a needle retraction action.

[0066] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0067] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent implementations or modifications made without departing from the spirit of the art of this application, such as combinations, divisions or repetitions of features, should be included within the scope of protection of this application.

Claims

1. A simple inhaler, characterized in that, include: The main body contains a drug compartment for holding drug carriers; A needle, one end of which is a needle tip, and the other end is provided with a matching structure. The needle is movably disposed on the main body. The needle tip can perform a piercing action to pierce the drug carrier along its axial direction, or perform a retraction action to leave the drug carrier along its axial direction. An active component is disposed outside the drug reservoir and movable relative to the main body. The active component is capable of moving relative to the main body in a first direction perpendicular to the axial direction of the needle tip. The active component is provided with a guide structure coupled to the mating structure. The guide structure includes a guide segment one and a guide segment two connected to the guide segment one along the straight direction of the first direction. Along the opposite direction to the first direction, the guide segment one has an extension direction that gradually approaches the drug reservoir in the axial direction of the needle tip, and the guide segment two has an extension direction that gradually moves away from the drug reservoir in the axial direction of the needle tip. When the active component moves along the first direction, the first guide segment and the second guide segment pass through the mating structure in sequence. The first guide segment drives the needle tip to perform the piercing action through the mating structure, and the second guide segment drives the needle tip to perform the needle retraction action through the mating structure.

2. The inhaler with a simple structure according to claim 1, characterized in that, The guiding structure is a guide groove; The mating structure includes a circular roller pivotally connected to the needle, the roller being axially perpendicular to the axial direction of the needle tip and perpendicular to the plane of motion of the guide groove relative to the body, and the diameter of the roller being smaller than the distance between the two groove walls of the guide groove in the axial direction of the needle tip.

3. The inhaler with a simple structure according to claim 1, characterized in that, The guiding structure is a guide groove; The mating structure is disposed within the guide groove, and the mating structure slides and rubs against the guide groove.

4. The inhaler with a simple structure according to claim 1, characterized in that, The mating structure has two spaced mating parts. The guide structure passes through the gap between the two mating parts and runs along the axial direction of the needle tip. The two mating parts are located on both sides of the guide structure. When the active member moves along the first direction, the guide structure can drive the needle tip to perform a piercing action or a needle retraction action through the two mating parts.

5. The inhaler with a simple structure according to claim 1, characterized in that, The active component has an initial position and a disengagement position on the motion path formed by the linear motion of the active component along the first direction; When the active component is in the initial position, the mating structure is connected to the guide structure; When the active component moves from the initial position to the disengagement position along the first direction, the first guide segment and the second guide segment pass through the mating structure in sequence; When the active component reaches the disengagement position, the guide structure separates from the mating structure.

6. The inhaler with a simple structure according to claim 5, characterized in that, The main body is provided with a working channel, and the main body is provided with a connecting hole connecting the working channel and the medicine compartment; The mating structure is connected to the guide structure within the working channel. The needle tip can enter and exit the drug chamber through the connecting hole to perform a puncture or needle withdrawal action. The diameter of the needle tip is not greater than the inner diameter of the connecting hole. When the active component reaches the disengagement position, the guide structure separates from the mating structure, and the needle tip can disengage from the connecting hole and enter the working channel.

7. The inhaler with a simple structure according to claim 1, characterized in that, The first direction is a straight line direction perpendicular to the axial direction of the needle tip; or, The first direction is the direction in which the rotating component rotates around a rotation axis, and the rotation axis of the first direction is parallel to the axial direction of the needle tip.

8. The inhaler with a simple structure according to claim 1, characterized in that, The main body includes a storage cylinder and a suction nozzle; The storage cylinder contains the medicine compartment; The nozzle has a filter element inside its internal channel, which divides the internal channel into an intake section and a connecting section. The connecting section is inserted into the storage cylinder.

9. An inhaler with a labor-saving puncture mechanism according to claim 8, characterized in that, The storage cylinder has a first air passage on its side wall that communicates with the medicine compartment; The side wall of the connecting section is provided with a second air passage; The connecting section and the storage cylinder are coaxially arranged and plugged into each other. The first air passage is connected to the second air passage to form an air inlet passage connecting the medicine compartment with the outside world. The air intake is angled relative to the radial direction of the storage cylinder within its cross-section.

10. An inhaler with a labor-saving puncture mechanism according to claim 9, characterized in that, A positioning guide structure is also provided between the storage cylinder and the connecting section. The guide structure includes a positioning guide channel extending along the axial direction of the storage cylinder and a positioning guide part that can be inserted into the positioning guide channel. When the storage cylinder is inserted into the connecting section, one of the positioning guide channel and the positioning guide block is located on the outer side wall of the storage cylinder, and the other is located on the inner side wall of the connecting section, or... When the connecting section is inserted into the storage cylinder, one of the positioning guide channel and the positioning guide block is located on the inner side wall of the storage cylinder, and the other is located on the outer side wall of the connecting section. When the storage cylinder and the connecting section are inserted into each other, the positioning guide part is inserted into the positioning guide channel along the axial direction of the storage cylinder, restricting the movement of the connecting section relative to the storage cylinder around the axis of the storage cylinder.

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