CN216319316U - Active inhalation drug delivery device based on MEMS - Google Patents
Active inhalation drug delivery device based on MEMS Download PDFInfo
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- CN216319316U CN216319316U CN202122573451.2U CN202122573451U CN216319316U CN 216319316 U CN216319316 U CN 216319316U CN 202122573451 U CN202122573451 U CN 202122573451U CN 216319316 U CN216319316 U CN 216319316U
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Abstract
The utility model discloses an active inhalation drug delivery device based on MEMS, which comprises a drug solution box, an oil guide plate, a porous liquid guide block, an atomization chip, a base, a PCB and a suction nozzle, wherein the oil guide plate is provided with at least one liquid guide hole, the porous liquid guide block is arranged below the liquid guide hole, the base is provided with two through holes, metal electrodes are arranged in the through holes, each metal electrode comprises an upper metal electrode, a lower metal electrode and a spring, one end of each spring is fixedly connected to the upper metal electrode, the other end of each spring is fixedly connected to the lower metal electrode, a contact on the upper metal electrode is abutted against a resistance wire on the atomization chip, the lower metal electrode is abutted against a connecting column of the PCB, the base is provided with a first aerosol channel, the suction nozzle is arranged on the base, the suction nozzle is provided with a second aerosol channel, and the second aerosol channel is communicated with the first aerosol channel. The utility model can solve the problem of deformation or fragmentation of the MEMS atomizing core or the chip upper part structure.
Description
Technical Field
The utility model relates to the technical field of MEMS medical treatment, in particular to an active inhalation drug delivery device based on MEMS.
Background
Currently, with the diversification of life and the aggravation of environmental pollution, respiratory diseases have become common diseases today, such as asthma, chronic obstructive pulmonary disease, etc., and the number of patients is increasing continuously. In general, chronic respiratory diseases need long-term treatment, and the selection of treatment modes is very important. It has been shown that inhalation is the most simple and effective way to treat asthma, chronic pulmonary obstruction and other respiratory diseases.
Inhalation therapy is a method in which a liquid medicine is atomized to form an aerosol, and the aerosol is inhaled by a patient to complete treatment. The medicinal aerosol reaches the respiratory tract and then the lung from the oral cavity by inhalation, and is diffused in the lung to reach the diseased region. The inhalation therapy method can directly act the liquid medicine on the pathological change part and has the characteristics of direct effect, quick response, high safety and small side effect.
It has been shown that the absorption of medical fluids in the respiratory tract and lungs varies depending on the diameter of the medical fluid particles. For adults, particles with the diameter of 0.5-1.0 um can be effectively deposited on respiratory bronchi and alveoli, most of the particles with the diameter of 1.0-5.0um are absorbed in 10-17 grades of bronchi, most of the liquid medicine is deposited on throats and respiratory tracts. The more the medicine liquid particles with the particle size of 1.0-3.0 um are generated by the inhalation administration device, the larger the proportion is, and the better the curative effect is.
In the prior art, in order to mount the MEMS atomizer, a groove is generally formed in the base so as to mount the MEMS atomizer therein. The MEMS atomizer, which atomizes by means of heating, generally prepares a resistance wire at the bottom of the chip, and heats by joule heat. Welding pads are reserved at two ends of the resistance wire and are in contact with metal electrodes on the base. In order to make good electrical contact, the MEMS atomizing core and the metal electrode are generally soldered together, and the following disadvantages are liable to occur:
the MEMS atomizing core is generally made of materials such as silicon and is easily affected by stress, the stress distribution on the chip is uneven, the internal structure of the atomizer is partially deformed, the structure of the MEMS atomizing core comprises an atomizer micropore, a micro flow guide hole and an air bridge film, the atomizing effect is uneven, the proportion of liquid medicine particles with target diameters is affected, and the curative effect is attenuated.
2. The silicon material is a brittle material, and the MEMS atomizing core, the base and the metal electrode are in a hard connection mode, so that when the MEMS atomizing core, the base and the metal electrode are impacted, such as falling, the MEMS atomizing core or a part of a structure on a chip is easy to crack, and the atomizing system fails.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: in order to solve the problem of deformation or fragmentation of a MEMS atomizing core or a part structure on a chip, an active inhalation drug delivery device based on MEMS is provided.
In order to achieve the above object, the present invention provides an active inhalation drug delivery device based on MEMS, which comprises a drug solution box, an oil guide plate, a porous liquid guide block, an atomization chip, a base, a PCB and a suction nozzle, wherein the surface of the drug solution box is provided with at least one air inlet, the base is arranged at the bottom of the drug solution box, the oil guide plate is arranged between the base and the drug solution box, the oil guide plate is connected to the drug solution box, the oil guide plate is provided with at least one liquid guide hole, the porous liquid guide block is arranged below the liquid guide hole, the atomization chip is arranged above the base, the PCB is arranged below the base, the base is provided with two through holes, the through holes are provided with metal electrodes, the metal electrodes comprise an upper metal electrode, a lower metal electrode and a spring, one end of the spring is fixedly connected to the upper metal electrode, the other end of the spring is fixedly connected to the lower metal electrode, a contact on the upper metal electrode is abutted to a resistance wire on the atomization chip, the lower metal electrode is abutted to a connecting column of the PCB, a first aerosol channel is arranged on the base, the suction nozzle is installed on the base, a second aerosol channel is arranged in the suction nozzle, and the second aerosol channel is communicated with the first aerosol channel.
As a further description of the above technical solution:
the lower metal electrode is provided with a first mounting groove, the spring is arranged in the first mounting groove, the upper metal electrode is movably connected in the first mounting groove, and the outer side wall of the upper metal electrode is in butt joint with the groove wall of the first mounting groove.
As a further description of the above technical solution:
and a second mounting groove is formed in the upper metal electrode, and one end of the spring is fixedly connected in the second mounting groove.
As a further description of the above technical solution:
the PCB is provided with a battery, and the battery is electrically connected with the connecting column.
As a further description of the above technical solution:
the drain hole is provided with two, the position that the liquid medicine box corresponds the drain hole is provided with the water conservancy diversion face.
As a further description of the above technical solution:
the porous liquid guide block is detachably arranged on the oil guide plate.
As a further description of the above technical solution:
the base is provided with a mounting seat, the atomization chip is fixed on the mounting seat, and the top of the mounting seat supports against the porous liquid guide block.
As a further description of the above technical solution:
the base is provided with a mounting seat, the atomization chip is fixed on the mounting seat, and the top of the mounting seat supports against the porous liquid guide block.
As a further description of the above technical solution:
the porous liquid guide block is porous cotton or porous ceramic.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that: the metal electrode is changed into the metal electrode with elasticity, the metal electrode has longitudinal elasticity, welding is not needed, a certain pressure is kept between a metal electrode contact and a resistance wire bonding pad at the bottom of the MEMS atomization core, and the MEMS atomization core can be in good electric contact with the metal electrode. Simultaneously, MEMS atomizing core transversely and vertically all can carry out the small-amplitude removal, has released the partial stress on the chip, and the during operation, chip inner structure deformation is alleviated like the deformation of atomizer micropore, little water conservancy diversion hole and air bridge film, has promoted the atomizing homogeneity. When under the impact condition, the metal electrode buffers the impact, and the risk of the fragmentation of the MEMS atomization core or the partial structure on the chip is reduced. Meanwhile, due to the pressure applied by the metal electrode, the gap between the MEMS atomization core and the upper layer material is reduced, and the risk of liquid leakage of the inhalation administration device is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a MEMS-based active inhalation delivery device.
Figure 2 is a cross-sectional view of a MEMS-based active inhalation delivery device.
Fig. 3 is a schematic structural diagram of a base in an active inhalation drug delivery device based on MEMS.
Illustration of the drawings:
1. a liquid medicine box; 11. a flow guide surface; 2. an oil guide plate; 21. a drain hole; 3. a porous liquid guide block; 4. atomizing the chip; 41. a resistance wire; 5. a base; 51. a through hole; 52. a first aerosol channel; 53. a mounting seat; 6. a PCB board; 61. connecting columns; 62. a battery; 7. a suction nozzle; 71. a second aerosol passage; 8. an air inlet; 9. a metal electrode; 91. an upper metal electrode; 911. a second mounting groove; 92. a lower metal electrode; 921. a first mounting groove; 93. a spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", and the like refer to the orientation or position relationship based on the drawings or the orientation or position relationship that the utility model product is usually placed when in use, and are only used for convenience of describing the present invention and simplifying the description, but do not refer to or imply that the device or the element to be referred must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, the present invention provides an active inhalation drug delivery device based on MEMS, which includes a drug solution box 1, an oil guide plate 2, a porous liquid guide block 3, an atomizing chip 4, a base 5, a PCB 6 and a suction nozzle 7, wherein the surface of the drug solution box 1 is provided with at least one air inlet 8, the base 5 is disposed at the bottom of the drug solution box 1, the oil guide plate 2 is disposed between the base 5 and the drug solution box 1, the oil guide plate 2 is connected to the drug solution box 1, the oil guide plate 2 is provided with at least one liquid guide hole 21, the porous liquid guide block 3 is mounted below the liquid guide hole 21, the atomizing chip 4 is disposed above the base 5, the PCB 6 is disposed below the base 5, the base 5 is provided with two through holes 51, the through holes 51 are provided with metal electrodes 9, the metal electrodes 9 include upper metal electrodes 91, lower metal electrodes 91, and lower metal electrodes 7, The aerosol atomizing device comprises a lower metal electrode 92 and a spring 93, wherein the spring 93 is a metal spring, one end of the spring 93 is fixedly connected to the upper metal electrode 91, the other end of the spring 93 is fixedly connected to the lower metal electrode 92, a contact point on the upper metal electrode 91 is abutted to a resistance wire 41 on an atomizing chip 4, the lower metal electrode 92 is abutted to a connecting column 61 of the PCB 6, a first aerosol channel 52 is arranged on the base 5, the suction nozzle is installed on the base 5, a second aerosol channel 71 is arranged in the suction nozzle 7, and the second aerosol channel 71 is communicated with the first aerosol channel 52.
Be provided with first mounting groove 921 on the lower metal electrode 92, the spring 93 sets up in the first mounting groove 921, go up metal electrode 91 swing joint in the first mounting groove 921, just go up the lateral wall of metal electrode 91 with the cell wall looks butt of first mounting groove 921, upward be provided with second mounting groove 911 on the metal electrode 91, the one end fixed connection of spring 93 is in the second mounting groove 911. Thus, the upper metal electrode and the lower metal electrode can be contacted more tightly, and disconnection is prevented.
The PCB 6 is provided with a battery 62, and the battery 62 is electrically connected with the connecting column 61. The battery can be replaced in time, and the service life is prolonged.
The drain hole 21 is provided with two, the position that the liquid medicine box 1 corresponds drain hole 21 is provided with water conservancy diversion face 11. The flow guide surface can better guide the liquid medicine into the oil guide plate.
The porous liquid guide block 3 is detachably arranged on the oil guide plate 2. The area of porous drain piece is greater than the area in drain hole, can be better with the liquid medicine dispersion on porous drain piece, improve atomization efficiency, simultaneously, porous drain piece 3 demountable installation is on the oil guide plate, the clean change of being convenient for improves drain efficiency.
The base 5 is provided with a mounting seat 53, the atomization chip 4 is fixed on the mounting seat 53, and the top of the mounting seat 53 is propped against the porous liquid guide block 3. The guide liquid can be prevented from flowing out of the atomization chip.
The porous liquid guide block 3 is porous cotton or porous ceramic. The liquid storage and locking effects are good.
The working principle is as follows: the liquid medicine is stored in the liquid medicine box, and the water conservancy diversion face is connected in liquid medicine box bottom, and the drain hole is connected with the water conservancy diversion face, forms the liquid medicine passageway, and its coupling part adopts the sealing ring to seal optionally, and the embedded porous drain piece in drain hole below accomplishes stock solution, the lock liquid of liquid medicine to supplementary liquid medicine is preliminary dispersed, and atomizing chip and liquid medicine box liquid medicine water conservancy diversion face direct contact can be avoided to porous drain piece, leads to the weeping phenomenon. The porous liquid guide block is in contact with two ends of the atomization chip, liquid medicine can be guided into the surface of the atomization chip, and micro structures for atomization, generally micropores or diversion trenches, are distributed on the atomization chip to refine and disperse the liquid medicine. Meanwhile, in order to atomize the liquid medicine through a heat source, a heating resistance wire is designed on the chip. According to the characteristics of the substrate material, if the substrate is made of a low-resistance material, a medium film is generally adopted between the resistance wire and the substrate for electrical isolation, an air inlet hole in the liquid medicine box is used for ventilation, during work, air flow flows in from the side surface above the atomization chip, when the atomization chip atomizes liquid medicine, the liquid medicine is mixed with air flowing into the inside of the medicine feeding device through the air inlet hole in the liquid medicine box, and the liquid medicine is atomized to form aerosol and flows out of the medicine feeding device from the first aerosol channel and the second aerosol channel in sequence. Meanwhile, in order to connect an external power supply of the chip resistance wire, an electrode through hole is formed in the base, and a metal electrode is arranged in the through hole. The metal electrode is internally provided with an elastic structure, such as a metal spring and the like, so that the metal electrode is ensured to have certain elasticity in the longitudinal direction. And after the chip resistance wire contact is arranged at the top end of the electrode, the resistance wire bonding pad and the electrode contact form good electric contact under the condition that the metal electrode applies pressure.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (8)
1. The active inhalation drug delivery device based on the MEMS is characterized by comprising a drug liquid box (1), an oil guide plate (2), a porous liquid guide block (3), an atomization chip (4), a base (5), a PCB (6) and a suction nozzle (7), wherein the surface of the drug liquid box (1) is provided with at least one air inlet hole (8), the base (5) is arranged at the bottom of the drug liquid box (1), the oil guide plate (2) is arranged between the base (5) and the drug liquid box (1), the oil guide plate (2) is connected on the drug liquid box (1), the oil guide plate (2) is provided with at least one liquid guide hole (21), the porous liquid guide block (3) is arranged below the liquid guide hole (21), the atomization chip (4) is arranged above the base (5), and the PCB (6) is arranged below the base (5), two through holes (51) are arranged on the base (5), metal electrodes (9) are arranged in the through holes (51), the metal electrode (9) comprises an upper metal electrode (91), a lower metal electrode (92) and a spring (93), one end of the spring (93) is fixedly connected to the upper metal electrode (91), the other end of the spring (93) is fixedly connected to the lower metal electrode (92), the contact point on the upper metal electrode (91) is abutted with the resistance wire (41) on the atomizing chip (4), the lower metal electrode (92) is abutted with the connecting column (61) of the PCB (6), the base (5) is provided with a first aerosol channel (52), the suction nozzle is arranged on the base (5), a second aerosol passage (71) is arranged in the suction nozzle (7), and the second aerosol passage (71) is communicated with the first aerosol passage (52).
2. The active MEMS-based inhalation drug delivery device according to claim 1, wherein a first mounting groove (921) is disposed on the lower metal electrode (92), the spring (93) is disposed in the first mounting groove (921), the upper metal electrode (91) is movably connected in the first mounting groove (921), and an outer sidewall of the upper metal electrode (91) abuts against a wall of the first mounting groove (921).
3. A MEMS-based active inhalation drug delivery device according to claim 1, wherein a second mounting groove (911) is provided on the upper metal electrode (91), and one end of the spring (93) is fixedly connected within the second mounting groove (911).
4. A MEMS-based active inhalation drug delivery device according to claim 1, characterized in that a battery (62) is provided on the PCB board (6), the battery (62) being electrically connected with the connection post (61).
5. The active inhalation drug delivery device based on MEMS according to claim 1 is characterized in that two liquid guide holes (21) are provided, and a flow guide surface (11) is provided on the position of the liquid medicine box (1) corresponding to the liquid guide holes (21).
6. A MEMS-based active inhalation drug delivery device according to claim 1, wherein the porous liquid block (3) is removably mounted on the oil guide plate (2).
7. A MEMS-based active inhalation drug delivery device according to claim 1, wherein a mounting seat (53) is provided on the base (5), the atomizing chip (4) is fixed on the mounting seat (53), and the top of the mounting seat (53) abuts against the porous liquid guide block (3).
8. The active MEMS-based inhalation delivery device according to claim 1, wherein the porous liquid conducting block (3) is porous cotton or porous ceramic.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122573451.2U CN216319316U (en) | 2021-10-25 | 2021-10-25 | Active inhalation drug delivery device based on MEMS |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122573451.2U CN216319316U (en) | 2021-10-25 | 2021-10-25 | Active inhalation drug delivery device based on MEMS |
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| CN216319316U true CN216319316U (en) | 2022-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113827821A (en) * | 2021-10-25 | 2021-12-24 | 美满芯盛(杭州)微电子有限公司 | Active inhalation drug delivery device system optimization method based on MEMS |
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2021
- 2021-10-25 CN CN202122573451.2U patent/CN216319316U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113827821A (en) * | 2021-10-25 | 2021-12-24 | 美满芯盛(杭州)微电子有限公司 | Active inhalation drug delivery device system optimization method based on MEMS |
| CN113827821B (en) * | 2021-10-25 | 2024-06-21 | 美满芯盛(杭州)微电子有限公司 | MEMS-based active inhalation drug delivery device |
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