Spacer and inhalation device

Abstract

The present invention discloses a spacer and an inhalation device. The spacer comprises a base sleeve, a base, a spacer body, and a suction cap, which are sequentially connected from bottom to top. The bottom of the base is provided with a mist inlet for connecting to an aerosol spray interface, and the mist inlet has a mist inlet wall. The top of the suction cap is provided with an air inlet for oral inhalation. The base sleeve is tightly attached to the outer wall and bottom end surface of the base and the mist inlet wall. A portion of the base sleeve extends toward the interior of the mist inlet to form an extension portion, and another portion of the base sleeve continues to extend upward along the mist inlet wall to form a first fitting portion. The inner edge of the extension portion extends upward to form a second fitting portion. The first fitting portion and the second fitting portion are configured to tightly wrap the aerosol spray interface. The spacer of the present invention can be connected to various aerosol spray interfaces and can reduce drug loss.

Description

Technical Field

[0001] The invention relates to a spacer and an inhalation device. Background Art

[0002] A spacer is an auxiliary tool for metered dose inhaler (MDI) inhalation therapy, used to store aerosol. When the atomized drug particles from the metered dose spray pass through the spacer, the drug particles and the air in the tank are fully mixed and then inhaled by the patient.

[0003] CN209075743U discloses a spacer tank comprising a tank body, a nozzle, and a mask. The tank body comprises an upper tank body and a lower tank body that are detachably connected along a bisecting plane in the longitudinal direction thereof. A groove is provided on the connecting surface between the upper tank body and the lower tank body, and a ridge is provided on the connecting surface between the lower tank body and the upper tank body. A metered aerosol interface is provided on the outer surface of the upper tank body, the metered aerosol interface being located in the middle of the length of the tank body, and the aerosol passage in the metered aerosol interface being perpendicular to the axis of the tank body. One end of the tank body is threadedly connected to the rear end cover, and the other end is connected in sequence to a connecting ring, the nozzle, and the mask. A one-way flap (i.e., a one-way valve) is provided within the connecting ring, and the inner annular surfaces of both ends thereof are threadedly connected to the large end of the funnel-shaped nozzle and one end of the tank body, respectively. The outer annular surface of the connecting ring is threadedly connected to the mask. The spacer is only provided with a one-way valve in the connecting ring. When the patient undergoes nebulization treatment, the one-way valve opens, and the atomized drug particles enter the tank body through the one-way valve. The patient bites the mouthpiece to absorb the drug particles. However, when the patient exhales, there are no exhaust holes on the tank body and the mask. The patient needs to take off the mask to exhale, which makes it impossible for the patient to perform the exhalation and inhalation movements continuously. In addition, the exhaled gas is often accompanied by a lot of drug particles, resulting in large drug loss and low utilization rate. The quantitative aerosol interface connected to the quantitative aerosol is located in the middle of the length direction of the tank body. The interface is a rectangular structure and can only be connected to the quantitative aerosol that is compatible with its structure, which limits the application range of the spacer. In addition, the quantitative aerosol interface is not tightly connected to the quantitative aerosol, which easily causes the drug particles to diffuse.

[0004] CN203724572U discloses a new type of medical spacer for infants and young children, comprising a spacer chamber, a top cover connected to an opening at the top of the spacer chamber, and a base connected to the bottom of the spacer chamber. A through hole is provided in the central portion of the base, and an inhalation whistle that makes a sound when gas enters the base is also provided on the base. A one-way inhalation valve is provided on the top cover, and the top cover is also connected to a mask. The mask has an exhalation port at a position corresponding to the nose, and the exhalation port is provided with a one-way flow exhalation valve and an exhalation whistle. Although the spacer is provided with an exhalation port on the mask so that the airflow exhaled by infants and young children can be discharged through the exhalation port of the mask, because the mask does not directly contact the oral cavity, and infants and young children are not proficient in exhalation and inhalation operations and cannot perform the exhalation and inhalation movements in a coherent manner, the exhaled gas is often accompanied by a lot of atomized particles, resulting in drug waste and low utilization rate. The through hole on the base of the spacer tank that is connected to the metered dose aerosol inhaler is in the shape of a long strip, and can only be connected to the metered dose aerosol inhaler that is compatible with its structure, which limits the application range of the spacer tank.

[0005] In summary, the traditional spacer described in the above patent documents can only be used with some metered dose aerosols, which limits its application scope. In addition, the drug loss during use is large, the utilization rate is low, and the delivery volume is low. Summary of the Invention

[0006] One object of the present invention is to provide a spacer that can be connected to various aerosol spray interfaces, has a wide range of applications, can reduce drug loss, and improve drug utilization.

[0007] Another object of the present invention is to provide an inhalation device.

[0008] The purpose of the present invention is achieved through the following technical solutions.

[0009] On the one hand, the present invention provides a mist storage tank, comprising a base cover, a base, a mist storage tank body and a suction cap that are sequentially connected from bottom to top, the bottom of the base is provided with a mist inlet for connecting to an aerosol spray interface, and the mist inlet has a mist inlet wall; the top of the suction cap is provided with an air inlet for mouth inhalation; the base cover is tightly attached to the outer wall and bottom end face of the base and the mist inlet wall, a part of the base cover extends toward the inside of the mist inlet to form an extension part, and another part of the base cover continues to extend upward along the mist inlet wall to form a first fitting part; the inner edge of the extension part extends upward to form a second fitting part; the first fitting part and the second fitting part are configured to tightly wrap the aerosol spray interface.

[0010] According to the spacer of the present invention, preferably, the plane where the extension portion is located is set to be higher than the bottom end surface of the base.

[0011] According to the spacer tank of the present invention, preferably, the extension portion is a crescent-shaped structure; there are multiple extension portions, which are symmetrically arranged inside the mist inlet;

[0012] The inner edges of the plurality of extension portions respectively extend upward to form a plurality of second fitting portions;

[0013] There are multiple first bonding parts.

[0014] According to the spacer tank of the present invention, preferably, the spacer tank body is a spindle-shaped structure with a hollow interior, comprising a cylinder and an upper end cover that are mutually clamped from bottom to top, the bottom of the cylinder is configured to be clamped with the base, and the top of the upper end cover is covered with the suction cap.

[0015] According to the mist storage tank of the present invention, preferably, the top of the upper end cover is a hollow structure; the hollow structure includes a gathering portion located at the center of the hollow structure, a plurality of reinforcing ribs extending from the gathering portion to the edge of the hollow structure and symmetrically distributed, and a plurality of guide pillars uniformly distributed circumferentially along the edge of the hollow structure; a vent is formed between two adjacent reinforcing ribs, and the guide pillar is located in the vent.

[0016] According to the spacer tank of the present invention, preferably, the edges of the plum blossom gasket are connected and the interior is divided into multiple petals, and the size of the petals is set to be able to cover the vent hole on the upper end cover; the plum blossom gasket is provided with a guide hole matching the guide post, and the plum blossom gasket is set to be able to pass through the guide hole and cover the vent hole through the guide post.

[0017] According to the spacer tank of the present invention, preferably, the suction cap is provided with a plurality of ridges along the longitudinal direction on the inner side wall close to the upper end cover; the suction cap covers the top of the upper end cover, and the ridges are configured to be able to press on the outer edge of the plum blossom gasket.

[0018] According to the mist storage tank of the present invention, preferably, the upper end cover is provided with a one-way valve on the outer side wall close to the suction cap, and the suction cap extends a one-way valve cavity outward and downward from the outer side wall close to the upper end cover; the one-way valve cavity is communicated with the air inlet, and the suction cap is configured to cover the top of the upper end cover; the one-way valve cavity and the one-way valve are configured to be able to snap together; the bottom of the one-way valve cavity is clamped with a cover plate for covering the one-way valve cavity; the cover plate is provided with air holes, and the bottom surface of the cover plate is configured to be lower than the top end surface of the upper end cover; the valve plate thickness of the one-way valve is 0.1 to 0.6 mm.

[0019] According to the spacer tank of the present invention, preferably, it further includes a small cap, which is configured to cover the air inlet of the suction cap; the suction cap is provided with a convex column on the outer wall close to the upper end cover, and the outer wall of the small cap is provided with a connecting piece; one end of the connecting piece is connected to the small cap, and the other end of the connecting piece is sleeved on the convex column.

[0020] On the other hand, the present invention provides an inhalation device, comprising the above-mentioned spacer and an aerosol device having an aerosol spray interface, wherein the mist inlet of the spacer is connected to the aerosol spray interface of the aerosol device.

[0021] The spacer of the present invention includes a base cover at the mist inlet of the base. The base cover's extended portion, at the mist inlet, forms an opening that can be connected to a variety of aerosol spray nozzles, expanding the spacer's applicability. Furthermore, once inserted into the mist inlet, the aerosol spray nozzle is tightly enclosed by the base cover's extended portion, the first engaging portion, and the second engaging portion, preventing drug particles from dispersing from the mist inlet, reducing drug loss and improving drug utilization.

[0022] The spacer of this invention has a simple structure. The one-way valve on the inhalation cap acts as a one-way diaphragm for exhalation, while the plum blossom gasket acts as a one-way diaphragm for inhalation. The two work together to make the patient's breathing more efficient and smoother, shortening the duration of inhalation therapy. When the patient exhales, the plum blossom gasket closes without affecting the drug particles in the spacer body, thereby improving drug utilization and reducing drug waste.

[0023] The various components of the spacer tank of the present invention are simply connected, and are easy to disassemble for cleaning, disinfection and reuse, thus avoiding cross infection. The spacer tank is also convenient to carry and store after disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a spacer tank according to the present invention.

[0025] Figure 2 This is an exploded view of a spacer according to the present invention.

[0026] Figure 3 This is a schematic diagram of the front structure of the base of a spacer tank of the present invention.

[0027] Figure 4 The figure is a schematic diagram of the back structure of the base of a spacer tank of the present invention.

[0028] Figure 5 The figure is a schematic structural diagram of an upper end cover of a spacer tank according to the present invention.

[0029] Figure 6 The figure is a schematic structural diagram of a suction cap of a spacer tank of the present invention.

[0030] Figure 7 The figure is a schematic structural diagram of a plum blossom gasket of a spacer tank according to the present invention.

[0031] The following are the descriptions of the reference numerals:

[0032] 1-base sleeve, 2-base, 3-cylinder, 4-upper end cover, 41-collecting part, 5-plum blossom gasket, 6-suction cap, 61-one-way valve chamber, 7-small cap, 8-extension part, 81-first fitting part, 82-second fitting part, 9-guide column, 10-reinforcement rib, 11-vent, 12-one-way valve, 13-cover plate, 14-connecting piece, 15-convex column, 16-guide hole, 17-convex ridge, 18-air hole, 19-valve plate. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0034] Spacer

[0035] The spacer of the present invention comprises a base sleeve, a base, a spacer body, and a suction cap, which are sequentially interconnected. A plum blossom gasket is disposed within the spacer body. In a typical assembled configuration, the base sleeve, base, spacer body, and suction cap are sequentially arranged from bottom to top. In certain embodiments, the spacer of the present invention comprises a base sleeve, base, spacer body, and suction cap, which are sequentially interconnected from bottom to top.

[0036] base

[0037] The bottom of the base of the present invention is provided with a mist inlet for connecting to an aerosol spray interface. The mist inlet has a mist inlet wall. The shape of the mist inlet can match the shape of the aerosol spray interface. In a preferred embodiment, the mist inlet is circular. The base has an outer wall and a bottom end face, which are connected together. The mist inlet wall is arranged relative to the outer wall and is connected to the bottom end face. The projection of the outline of the mist inlet wall on the horizontal plane falls within the projection of the outline of the outer wall on the horizontal plane. The bottom end face is formed between the projection of the outline of the mist inlet wall on the horizontal plane and the projection of the outline of the outer wall on the horizontal plane. The shape of the projection of the outline of the mist inlet wall on the horizontal plane and the projection of the outline of the outer wall on the horizontal plane can be the same, for example, both are circular. The bottom end face can be annular.

[0038] Base cover

[0039] The base cover fits snugly against the outer wall and bottom end surface of the base, as well as the wall of the mist inlet. This improves the seal between the spacer body and the aerosol spray interface. A portion of the base cover extends inwardly toward the mist inlet to form an extension, while another portion of the base cover continues upward along the wall of the mist inlet to form a first contact portion. The inner edge of the extension extends upward to form a second contact portion. The first and second contact portions are configured to tightly wrap around the aerosol spray interface. This further improves the seal between the spacer body and the aerosol spray interface. The extension is preferably crescent-shaped.

[0040] In certain embodiments, the extensions are multiple and symmetrically arranged inside the mist inlet; the inner edges of the multiple extensions respectively extend upward to form multiple second fitting portions; and the inner edges of the extensions extend upward to form multiple second fitting portions. According to one embodiment of the present invention, a portion of the base cover extends toward the interior of the mist inlet to form two oppositely arranged extensions, another portion of the base cover continues to extend upward along the wall of the mist inlet to form two first fitting portions, and the inner edges of the two extensions respectively extend upward to form two second fitting portions. The extensions can be crescent-shaped and symmetrically arranged inside the mist inlet.

[0041] When viewed from the front of the spacer, the plane where the extension lies is higher than the bottom end surface of the base. The height difference between the two is not particularly limited, for example, 0.1 to 3 mm, preferably 0.2 to 2 mm, and more preferably 0.3 to 1 mm.

[0042] Spacer body

[0043] The main body of the mist storage tank of the present invention is a hollow structure with a large middle and small ends. The shape of the mist storage tank main body is not particularly limited, and can be pear-shaped, tubular, elliptical, spindle-shaped, etc., preferably spindle-shaped. According to one embodiment of the present invention, the mist storage tank main body is a spindle-shaped structure with a hollow interior. The atomized drug particles are sprayed out through the aerosol spray interface and injected into the mist storage tank main body through the mist inlet. At this time, the atomized drug particles enter the mist storage tank main body at a relatively fast speed. If they are sprayed directly into the patient's mouth, it is easy to cause an impact on the patient's oral cavity and induce coughing. Due to the limited volume of the oral cavity, most of the drug particles sprayed into the oral cavity remain on the surface of the oral cavity, resulting in a large amount of drug waste and easily causing oral streptococcal infection. The present invention selects a spindle-shaped mist storage tank main body structure, the middle of which has a larger mist storage space, which avoids a large amount of atomized drug particles directly entering the patient's oral cavity and causing impact on the oral cavity, thereby reducing the residue of drug particles in the oral cavity. Moreover, due to the special spindle-shaped structure, the drug particles are not easily in contact with the inner wall of the spacer body, thus avoiding or reducing the adhesion of the drug particles to the inner wall, thereby improving the utilization rate of the drug.

[0044] The spacer body comprises a barrel and an upper end cap, arranged sequentially from bottom to top. The barrel and upper end cap are interlocked. The bottom of the barrel is interlocked with the base, and the suction cap is mounted on top of the upper end cap. Designing the spacer body as a barrel and upper end cap interlocked with each other provides a good seal and facilitates disassembly and cleaning of medication adhered to the inner wall. The barrel and base are interlocked, making disassembly and cleaning easier.

[0045] The cylinder of the present invention is a hollow structure with a larger upper portion and a smaller lower portion.

[0046] The top of the upper end cover of the present invention is a hollow structure. The hollow structure includes a collection portion, a plurality of reinforcing ribs, and a plurality of guide pillars. The collection portion is located at the center of the hollow structure. A plurality of reinforcing ribs extend from the collection portion to the edge of the hollow structure. The plurality of reinforcing ribs are symmetrically distributed. A plurality of guide pillars are arranged along the edge of the hollow structure. Preferably, the plurality of guide pillars are evenly distributed along the circumference of the edge of the hollow structure. A vent is formed between two adjacent reinforcing ribs. The guide pillar is located in the vent. When viewed from the front of the mist storage tank, the guide pillar protrudes upward to facilitate the fixing of the plum blossom gasket.

[0047] In certain embodiments, the hollow structure includes a collection portion located at the center of the hollow structure; a plurality of symmetrically distributed reinforcing ribs extending from the collection portion to the edge of the hollow structure; and a plurality of guide pillars evenly distributed circumferentially along the edge of the hollow structure; a vent is formed between two adjacent reinforcing ribs, and the guide pillars are located within the vent. According to one embodiment of the present invention, the hollow structure includes a collection portion located at the center of the hollow structure; 4 to 16, preferably 6 to 12, more preferably 6 to 8, reinforcing ribs extending from the collection portion to the edge of the hollow structure and symmetrically distributed; and 4 to 16, preferably 6 to 12, more preferably 6 to 8, guide pillars evenly distributed circumferentially along the edge of the hollow structure; a vent is formed between two adjacent reinforcing ribs, and the guide pillars are located within the vent.

[0048] plum blossom gasket

[0049] The plum blossom gasket of the present invention has connected edges and is internally divided into a plurality of petals. The size of the petals is set to be able to cover the vent holes on the upper end cover; the plum blossom gasket is provided with a guide hole matching the guide post, and the plum blossom gasket is set to be able to pass through the guide hole through the guide post and cover the vent holes. Preferably, the outer contour of the plum blossom gasket is circular. Its edges are connected and the interior is divided into a plurality of approximately triangular petals, and the size of the petals is just able to cover the vent holes on the upper end cover. The number of guide holes is the same as the number of guide posts. The number of guide holes can be 4 to 16, preferably 6 to 12, and more preferably 6 to 8.

[0050] The plum blossom gasket can be made of flexible and elastic materials such as thermoplastic elastomer TPE, silicone, thermoplastic polyurethane elastomer rubber TPU, rubber, etc. Such materials make the plum blossom gasket easy to open and reset, which can reduce the patient's breath holding phenomenon caused by hypoxia and make the patient breathe smoothly.

[0051] The plum blossom gasket is secured with a guide post and ridges to prevent it from falling off the upper end cap during opening and closing. The plum blossom gasket is unidirectional, meaning it can only be closed or opened toward the inhalation cap in the spacer, and cannot be opened in the opposite direction.

[0052] Suction cap

[0053] The inhalation cap of the present invention has an inhalation port at the top for inhaling aerosolized drug particles. The inhalation cap has multiple ridges longitudinally arranged on the inner sidewall near the upper end cap. The inhalation cap covers the top of the upper end cap, and the ridges are configured to press against the outer edge of the plum blossom gasket. In some embodiments, the inhalation cap has multiple ridges evenly distributed longitudinally on the inner sidewall near the upper end cap. This further secures the plum blossom gasket. The number of ridges can range from 6 to 16, preferably 7 to 15, and more preferably 9 to 12.

[0054] The upper end cap and suction cap are connected by ultrasonic welding, adhesive bonding, or threaded connection, preferably ultrasonic welding. Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of the upper end cap and suction cap. Under pressure, the two surfaces rub against each other, forming a molecular fusion bond. Ultrasonic welding offers high welding speed and strength, and does not require melting the welding material. The welded upper end cap and suction cap provide a good seal, protecting the plum blossom gasket between the upper end cap and suction cap from damage.

[0055] One-way valve and one-way valve chamber

[0056] The upper end cover is provided with a one-way valve on the outer side wall near the suction cap, and the suction cap extends a one-way valve cavity outward and downward from the outer side wall near the upper end cover; the one-way valve cavity is communicated with the air intake port, and the suction cap is configured to cover the top of the upper end cover; the one-way valve cavity and the one-way valve are configured to be snap-fitted; a cover plate for covering the one-way valve cavity is snapped onto the bottom of the one-way valve cavity; air holes are provided on the cover plate, and the bottom surface of the cover plate is configured to be lower than the top end surface of the upper end cover; the valve plate thickness of the one-way valve is 0.1 to 0.6 mm.

[0057] The one-way valve is placed within the one-way valve cavity to prevent damage. The one-way valve cavity communicates with the inhalation port and has an air hole at its bottom. When the patient exhales, the one-way valve opens, and the pressure inside the spacer body exceeds the external atmospheric pressure, closing the plum blossom gasket between the spacer body and the inhalation cap. Air then flows through the one-way valve and out of the air hole, retaining the atomized drug particles within the spacer body and preventing them from being expelled into the air with the patient's exhalation. This effectively reduces drug particle waste and saves treatment costs.

[0058] The thickness of the one-way valve disc is 0.1 to 0.6 mm, preferably 0.2 to 0.4 mm, and more preferably 0.2 mm. Setting the disc thickness within this range improves the sensitivity of the disc opening and closing. Even when the patient exhales weakly, the disc of the one-way valve can still open; when the patient inhales, the disc of the one-way valve quickly closes.

[0059] Small hat

[0060] The spacer of the present invention may also include a small cap. The small cap is configured to cover the air inlet of the suction cap; the suction cap is provided with a boss on its outer wall near the upper end cap, and a connector is provided on the outer wall of the small cap; one end of the connector is connected to the small cap, and the other end of the connector is sleeved onto the boss. The small cap covers the air inlet, keeping it clean, preventing bacterial growth, and reducing the rate of oral infection. The connector structure connects the small cap to the suction cap. When using the spacer, the patient only needs to remove the small cap without worrying about losing it.

[0061] Inhalation device

[0062] The inhalation device of the present invention comprises the aforementioned spacer and an aerosol device having an aerosol spray port. The spacer's mist inlet interfaces with the aerosol spray port of the aerosol device. The aerosol spray port is inserted into the mist inlet, and the base sleeve is configured to tightly enclose the aerosol spray port. This inhalation device allows for more efficient and smooth breathing, reduces drug loss, and improves drug utilization.

[0063] Example 1

[0064] Figure 1 Schematic diagram of the structure of a spacer tank of the present invention; Figure 2 An exploded view of a spacer according to the present invention; Figure 3 This is a schematic diagram of the front structure of a base of the present invention; Figure 4 This is a schematic diagram of the back structure of a base of the present invention; Figure 5 This is a schematic structural diagram of an upper end cover of the present invention; Figure 6 Schematic diagram of the structure of a suction cap of the present invention; Figure 7It is a structural schematic diagram of a plum blossom gasket of the present invention.

[0065] like Figure 1 As shown, the spacer of this embodiment comprises a base 2, a spacer body, and an inhalation cap 6, which are interconnected from bottom to top. The base 2 has a mist inlet at the bottom for connection to an aerosol sprayer. The inlet is circular and has a wall. The inhalation cap 6 has an inhalation port at the top for oral inhalation of drug particles.

[0066] The spacer body is a hollow, spindle-shaped structure with a large central storage space. This prevents large amounts of aerosolized drug particles from directly entering the patient's mouth, thereby reducing oral retention. Due to the spindle-shaped structure, drug particles are less likely to come into contact with the inner wall of the spacer body, reducing or even preventing particle adhesion, thereby improving drug utilization.

[0067] like Figure 1 and 2 As shown, the spacer body comprises a barrel 3 and an upper end cap 4, which are interlocked from bottom to top. The bottom of the barrel 3 is interlocked with the base 2, and the top of the upper end cap 4 is covered with a suction cap 6. Preferably, the upper end cap 4 and suction cap 6 are connected by ultrasonic welding. This structure provides a good sealing effect and is easy to disassemble. The barrel 3 and base 2 are arranged in a snap-fit ​​connection, which facilitates disassembly and cleaning. Ultrasonic welding of the upper end cap 4 and suction cap 6 prevents damage to the plum blossom gasket 5.

[0068] like Figure 3 and 4 As shown, the mist storage tank of this embodiment also includes a base cover 1, which is tightly attached to the outer wall and bottom end face of the base 2 and the wall of the mist inlet. A part of the base cover 1 extends toward the inside of the mist inlet to form two oppositely arranged extensions 8. Another part of the base cover 1 continues to extend upward along the wall of the mist inlet to form a first fitting portion 81. Observed from the front of the mist storage tank, the plane where the extension 8 is located is higher than the bottom end face of the base 2. The extension 8 is a crescent-shaped structure, symmetrically arranged inside the mist inlet. Observed from the front of the mist storage tank, the inner edges of the two extensions 8 respectively extend upward to form a second fitting portion 82. When the aerosol spray interface is inserted into the mist inlet, the base cover 1 tightly wraps the aerosol spray interface, thereby preventing the atomized drug particles from overflowing from the mist inlet. The base cover 1 can be a component formed of thermoplastic rubber, which can be combined with the base 2 by encapsulation.

[0069] like Figure 5As shown, the top of the upper end cap 4 is a hollow structure. This hollow structure includes a central hub 41 located at the center of the hollow structure, multiple (e.g., six) symmetrically distributed reinforcing ribs 10 extending from the hub 41 toward the periphery of the hollow structure, and multiple (e.g., six) guide posts 9 evenly distributed circumferentially around the periphery of the hollow structure. Ventilation holes 11 are formed between adjacent ribs 10. The guide posts 9 are positioned within the vents 11. When viewed from the front of the spacer, the guide posts 9 protrude upward.

[0070] like Figure 7 As shown, the outer contour of the plum blossom gasket 5 is circular. Its edges are connected, and its interior is divided into multiple, approximately triangular petals (e.g., six). The petals are sized to cover the vent 11 in the upper end cap 4. The plum blossom gasket 5 is provided with a guide hole 16 that matches the guide post 9. The plum blossom gasket 5 passes through the guide post 9 through the guide hole 16 and covers the vent 11.

[0071] like Figure 6 As shown, the suction cap 6 has a plurality of ridges 17 (e.g., 9) evenly distributed longitudinally on the inner side wall near the upper end cover 4. The suction cap 6 covers the top of the upper end cover 4. The ridges 17 press on the outer edge of the plum blossom gasket 5. This arrangement can prevent the plum blossom gasket 5 from falling off from the upper end cover 4 when it is opened or closed during the breathing process. The plum blossom gasket 5 has unidirectional conductivity, that is, in the spacer, it can only be closed and opened in the direction of the suction cap 6, and cannot be opened in the opposite direction. The plum blossom gasket 5 can be made of an elastic material to facilitate the opening and resetting of the petals, thereby reducing the patient's breath holding phenomenon due to lack of oxygen.

[0072] like Figure 5 and 6 As shown, a one-way valve 12 is provided on the outer wall of the upper end cap 4 near the inhalation cap 6. A one-way valve cavity 61 extends outward and downward from the outer wall of the upper end cap 4, communicating with the inhalation port. When the inhalation cap 6 is placed on top of the upper end cap 4, the one-way valve cavity 61 engages with the one-way valve 12. A cover plate 13 is secured to the bottom of the one-way valve cavity 61, covering the one-way valve cavity 61. The cover plate 13 is provided with one or more air holes 18. The bottom surface of the cover plate 13 is lower than the top surface of the upper end cap 4. The valve plate 19 of the one-way valve 12 is 0.2 mm thick. The one-way valve 12 is positioned within the one-way valve cavity 61 to prevent damage. When the patient exhales, the one-way valve 12 opens, the plum blossom gasket 5 closes, and the gas passes through the one-way valve 12 and out of the air holes 18. The atomized drug particles within the spacer body are retained and prevented from being expelled into the air with the patient's exhalation. This effectively reduces the waste of drug particles. Furthermore, the valve plate 19 of the one-way valve 12 is set to be 0.2 mm thick, which can improve the sensitivity of the valve plate 19 when opening and closing.

[0073] Example 2

[0074] Except for the following additional technical contents, the rest is the same as Example 1:

[0075] like Figure 2 As shown, the spacer tank of this embodiment also includes a small cap 7. The small cap 7 covers the air inlet of the suction cap 6 to keep the air inlet clean, prevent bacteria from growing, and reduce the rate of oral infection. Figure 1 As shown, the outer wall of the small cap 7 is provided with a connector 14; the suction cap 6 is provided with a boss 15 on the outer wall near the upper end cover 4. One end of the connector 14 is connected to the small cap 7, and the other end is sleeved on the boss 15 to prevent the small cap 7 from being lost.

[0076] During use, the aerosol sprayer is inserted into the mist inlet, the aerosol device is activated, and the drug mist is sprayed into the spacer. When the patient inhales, negative pressure forms within the spacer body, pushing open the petals of the plum blossom gasket 5 not secured by the ridges 17. Atomized drug particles flow through the vent 11 and are inhaled into the patient's mouth. The plum blossom gasket 5 ensures that air flows in only one direction, thus acting as a one-way valve. At this time, due to the inhalation pressure, the one-way valve 12 located within the one-way valve chamber 61 is closed, preventing external air from entering the spacer body. When the patient exhales, the air pressure within the spacer body exceeds the external atmospheric pressure. The plum blossom gasket 5 located between the spacer body and the inhalation cap 6 closes, while the one-way valve 12 located within the one-way valve chamber 61 opens. The patient's exhaled air flows out through the air holes 18 of the one-way valve 12. During the patient's next inhalation cycle, the plum blossom gasket 5 opens again, the one-way valve 12 closes, and the atomized drug particles are drawn into the patient's respiratory tract with the inhaled air. The arrangement of the plum blossom gasket 5 and the one-way valve 12 isolates the drug particles within the spacer body during patient exhalation, unaffected by the patient's exhalation. This reduces or prevents drug dissipation, thereby reducing drug diffusion, improving drug utilization, and maximizing drug delivery. The base cover 1 tightly wraps the aerosol spray port, further reducing drug particle diffusion and improving drug utilization. In short, the plum blossom gasket 5 and the one-way valve 12 are always in a closed state, regardless of inhalation or exhalation.

[0077] When cleaning is required, the base 2 is disconnected from the main body of the spacer, and the cylinder 3 is disassembled from the upper end cover 4, so that the spacer can be fully cleaned.

[0078] The present invention is not limited to the above-mentioned embodiments. Any modification, improvement, or substitution that can be conceived by those skilled in the art without departing from the essential content of the present invention shall fall within the scope of the present invention.

Claims

1. A spacer, characterized in that: The invention comprises a base cover, a base, a mist storage tank body and a suction cap which are sequentially connected from bottom to top. The bottom of the base is provided with a mist inlet for connecting to an aerosol spray interface, and the mist inlet has a mist inlet wall; the top of the suction cap is provided with an air inlet for the mouth to inhale; the base cover is tightly attached to the outer wall and bottom end surface of the base and the mist inlet wall, a part of the base cover extends toward the inside of the mist inlet to form an extension part, and another part of the base cover continues to extend upward along the mist inlet wall to form a first fitting part; the inner edge of the extension part extends upward to form a second fitting part; the first fitting part and the second fitting part are configured to tightly wrap the aerosol spray interface; The extension part is a crescent-shaped structure; there are multiple extension parts, which are symmetrically arranged inside the mist inlet; The inner edges of the plurality of extension portions respectively extend upward to form a plurality of second fitting portions; There are multiple first fitting parts; The main body of the spacer is a spindle-shaped structure with a hollow interior, comprising a cylinder and an upper end cover that are mutually engaged from bottom to top, the bottom of the cylinder being configured to engage with the base, and the top of the upper end cover being covered with the suction cap; The top of the upper end cover is a hollow structure; the hollow structure includes a collection portion located in the center of the hollow structure, a plurality of reinforcing ribs extending from the collection portion to the edge of the hollow structure and symmetrically distributed, and a plurality of guide columns uniformly distributed circumferentially along the edge of the hollow structure; a vent is formed between two adjacent reinforcing ribs, and the guide column is located in the vent.

2. The spacer according to claim 1, wherein: The plane where the extension portion is located is set to be higher than the bottom end surface of the base.

3. The spacer according to claim 1, wherein: A plum blossom gasket is also provided inside the main body of the spacer tank. The edges of the plum blossom gasket are connected and the interior is divided into multiple petals. The size of the petals is set to cover the vent hole on the upper end cover; the plum blossom gasket is provided with a guide hole matching the guide post, and the plum blossom gasket is set to pass through the guide hole and cover the vent hole through the guide post.

4. The spacer according to claim 3, wherein: The suction cap is provided with a plurality of ridges along the longitudinal direction on the inner side wall close to the upper end cover; the suction cap covers the top of the upper end cover, and the ridges are configured to be able to press on the outer edge of the plum blossom gasket.

5. The spacer according to claim 1, wherein: The upper end cover is provided with a one-way valve on the outer side wall near the suction cap, and the suction cap extends a one-way valve cavity outward and downward from the outer side wall near the upper end cover; the one-way valve cavity is communicated with the air intake port, and the suction cap is configured to cover the top of the upper end cover; the one-way valve cavity and the one-way valve are configured to be snap-fitted; a cover plate for covering the one-way valve cavity is snapped onto the bottom of the one-way valve cavity; air holes are provided on the cover plate, and the bottom surface of the cover plate is configured to be lower than the top end surface of the upper end cover; the valve plate thickness of the one-way valve is 0.1 to 0.6 mm.

6. The spacer according to claim 1, wherein: It also includes a small cap, which is configured to cover the air inlet of the suction cap; the suction cap is provided with a convex column on the outer wall close to the upper end cover, and the outer wall of the small cap is provided with a connecting piece; one end of the connecting piece is connected to the small cap, and the other end of the connecting piece is sleeved on the convex column.

7. An inhalation device, characterized in that The invention comprises the spacer according to any one of claims 1 to 6 and an aerosol device having an aerosol spray interface, wherein the mist inlet of the spacer is connected to the aerosol spray interface of the aerosol device.

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