CN109621111B - Breath actuated inhaler - Google Patents

Abstract

The invention relates to a breath actuated inhaler comprising a housing having a mouthpiece at the lower part thereof; the medicine bottle is arranged in the shell from top to bottom and comprises a tank body for storing medicine, a valve rod arranged at the opening part of the tank body and a spring for resetting the valve rod after being pressed; the spray head is arranged in the shell, a spray hole facing the suction nozzle is arranged on the spray head, and the valve rod is inserted into the spray head; an actuating assembly connected to the canister and capable of driving the canister to move downwardly relative to the housing; the energy storage assembly is connected with the actuating assembly and enables the actuating assembly to have a trend of driving the tank body to move downwards; the stop component always has a trend of contacting the actuating component to limit the actuating component to drive the tank body to move downwards, and can be separated from the actuating component under the driving of air flow generated by suction force at the suction nozzle so as to release the limit of the actuating component. The inhaler does not need to inhale medicine and press a certain part all the time, and has the advantages of labor saving, convenience and large driving force.

Description

Breath actuated inhaler

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to a breath actuated inhaler.

Background

In recent years, with the development of inhaled drugs, many patients suffering from chronic airway diseases such as bronchial asthma and chronic obstructive pulmonary disease have been on the market, and the conditions of the patients are effectively controlled by long-term inhalation of the drugs, and in the prior art, inhalation devices are generally used for assisting in inhalation of the drugs.

As shown in an "air flow triggering powder inhalation device" disclosed in chinese patent publication No. ZL201810206621.3 (publication No. CN108421137 a), the device comprises a housing, a driving push plate and a sliding bearing member, wherein the housing is provided with an air circulation port, the driving push plate is disposed in the housing and is provided with a correcting member between the driving push plate and the inner wall of the housing, the sliding bearing member is connected with the driving push plate, and one side of the sliding bearing member is provided with a powder containing module.

The inhalation device synchronously triggers the quantitatively released medicine powder by using the air flow generated by the inhalation of a patient, the medicine powder is inhaled into the lung along with the air flow, and the medicine can be inhaled by using the air flow generated by the respiration without other operations. However, this device is not suitable for a liquid drug, and the driving force required for the drug is large compared to a powder.

For medicaments in liquid form, the inhalation devices currently used are mostly as shown in chinese patent publication No. zl 200983507. X (publication No. CN102131540 a), "inhaler and method of operating the same", the inhaler having a housing with a canister for storing the medicament therein, the housing being provided at an upper portion with a button which can be engaged by a user in a downward direction, forcing the button to move downward to bias a spring positioned between the button and the bottom of the canister, the button being depressed to engage a stop element secured within the housing, the flap element being rotatable about an axis. When the user inhales through the mouth, an air flow is established forcing the longest portion of the flapper element to move clockwise, then allowing the element to move downward due to the force exerted by the spring, whereby the medicament is dispensed into the mouth and inhaled by the user.

When the inhaler is used, a user needs to always press the button to enable the spring to be in a compressed state while inhaling the medicine, so that the canister is kept at a downward moving position for spraying the medicine, and the operation is very inconvenient, especially for children and old people; in addition, as shown in the above patent, most of the prior art inhalers have been designed such that the vial cannot be detached once it is put into the housing, i.e., the inhaler is disposable and is discarded after one use, resulting in waste of resources.

Disclosure of Invention

The invention aims to solve the technical problem of providing a breath actuated inhaler which can inhale medicine only by air flow generated by breathing and has high driving force.

The technical scheme adopted for solving the technical problems is as follows: a breath actuated inhaler comprising

A housing having a suction nozzle at a lower portion thereof;

the medicine bottle is arranged in the shell from top to bottom and comprises a tank body for storing medicine, a valve rod arranged at the opening part of the tank body and a spring for resetting the valve rod after being pressed;

the spray head is arranged in the shell, a spray hole facing the suction nozzle is formed in the spray head, and the valve rod is inserted into the spray head;

an actuating assembly connected to the canister and capable of driving the canister to move downwardly relative to the housing;

characterized in that it also comprises

The energy storage assembly is connected with the actuating assembly and enables the actuating assembly to have a trend of driving the tank body to move downwards;

the stop component always has a trend of contacting the actuating component to limit the actuating component to drive the tank body to move downwards, and can be separated from the actuating component under the driving of air flow generated by suction force at the suction nozzle so as to release the limit of the actuating component.

In order to facilitate the air flow generated by inhalation to push the stop component, a first air inlet communicated with the suction nozzle is arranged at the lower part of the shell, the air flow in the channel between the first air inlet and the suction nozzle can drive the stop component, and the air flow in the channel between the first air inlet and the suction nozzle is increased by arranging the first air inlet, so that medicines can be inhaled without excessive suction force.

In order to ensure that users of different ages can reliably inhale the medicine by applying suction force matched with the ages of the users, at least one second air inlet is further arranged at the lower part of the shell, a baffle capable of moving relative to the second air inlet is arranged at the second air inlet, and the baffle can shade at least partial second air inlets. Thus, the problem that the child can not trigger the stop component due to forced inhalation, so that the medicine can not be inhaled, or the adult can gently inhale the stop component to trigger the stop component, so that the medicine can not enter the lung is solved.

Preferably, the actuating assembly comprises a blocking block and a driving wheel capable of driving the blocking block to rotate, the driving wheel has a tendency of rotating around the axis of the driving wheel under the action of the energy storage assembly, and the tank body can move downwards to spray medicine along with the rotation of the driving wheel through a transmission structure;

the stop assembly comprises a stop seat and a stop block which is arranged on the stop seat and matched with the blocking block, the stop seat is driven by the air flow to rotate relative to the shell so as to enable the blocking block and the stop block to be separated from contact, and meanwhile, a first torsion spring is arranged, so that the stop seat always has a trend of rotating until the blocking block and the stop block are blocked and matched under the action of the first torsion spring.

In order to easily release the limit of the stop assembly to the actuating assembly, the wall surface of the stop block contacted with the clamping block is an arc surface, and the arc surface has the advantage that the blocking and matching between the clamping block and the stop block can be released by applying small force to the stop seat, so that the effect of 'four-two jack pulling' is achieved.

In order to ensure the working reliability of the stop assembly to the brake assembly, the stop assembly further comprises a stop plate positioned in a channel between the first air inlet and the suction nozzle, a stop plate is arranged in the shell, and the stop plate is propped against the stop plate in a state that the clamping and propping block is propped against the stop block, so that the stop seat is prevented from rotating excessively under the action of the first torsion spring to enable the stop plate to be separated from the stop plate.

The medicine originally sprayed out of the medicine bottle is usually mixed with bubbles, a shifting block penetrating out of the shell is arranged on the stopping seat, and a limiting groove for limiting the moving stroke of the shifting block is arranged on the shell. The stop seat is driven to move by artificial force on the shifting block so as to release the limit of the actuating component, so that the tank body of the medicine bottle moves downwards to spray the initial medicine.

Preferably, the energy storage assembly comprises a tightening sleeve and a second torsion spring which are arranged in the shell, the tightening sleeve and the driving wheel are coaxially arranged, two ends of the second torsion spring are respectively connected with the tightening sleeve and the driving wheel, the tightening sleeve can rotate around the axis of the tightening sleeve under the action of external force to store energy of the second torsion spring, a positioning structure which is positioned relative to the shell after the tightening sleeve rotates is further arranged between the tightening sleeve and the shell, and the second torsion spring stores energy to enable the driving wheel to have a rotating trend.

In order to enable the medicine bottle to be replaced, a fixing frame connected with the tank body through a clamping structure is sleeved on the tank body, a sleeve capable of moving up and down and rotating circumferentially relative to the shell is sleeved on the fixing frame and arranged between the fixing frame and the tightening sleeve, the sleeve is connected with the tightening sleeve through a detachable connecting structure, the clamping structure is locked by the sleeve to enable the fixing frame to be pressed on the tank body in a state that the sleeve is moved out of the shell, and the clamping structure is unlocked to enable the tank body to move relative to the fixing frame, so that the medicine bottle can be taken out from the shell, and the inhaler can be reused.

The positioning structure can have various structural forms, preferably, the outer wall of the tightening sleeve is provided with a first elastic buckling foot, the inner wall of the shell is provided with a buckling groove for the first buckling foot to buckle in, and the first buckling foot and the buckling groove form the positioning structure.

The transmission structure can have multiple structural forms, preferably, be equipped with first lug on the inner wall of action wheel, be equipped with on the outer wall of mount and supply first lug slip to inlay two at least first guide slots of circumference interval distribution of establishing, each first guide slot top-down is along circumference heliciform extension, links up between two adjacent first guide slots and has the horizontal part that supplies first lug to remove from a first guide slot to another first guide slot, the first lug is in the moving time on the horizontal part and the medicine spraying time looks adaptation of medicine bottle, first lug on this action wheel and the first guide slot on the mount have constituted transmission structure. The transmission structure is simple in structure and high in working reliability.

In order to facilitate the user to know the energy storage state of the energy storage component to the actuating component, the tightening sleeve is circumferentially provided with a marking strip for displaying the working state of the energy storage component, the shell is provided with a first window for locally exposing the marking strip or the position of the shell corresponding to the marking strip is at least locally made of transparent materials. According to the mark on the mark strip, the user can intuitively know the energy storage condition of the actuating assembly.

In order to easily release the limit of the stop component to the first final gear, preferably, a bracket for installing the stop seat is arranged in the shell, the actuating component further comprises the first final gear arranged on the bracket, the blocking block is arranged on the first final gear, a driving tooth part is circumferentially arranged on the driving wheel, and the driving tooth part and the first final gear are in direct engagement transmission or in indirect engagement transmission through at least one first intermediate gear arranged on the bracket. The first final gear can be decelerated in multiple stages from the first final gear to the driving wheel, so that the restriction of the stop component on the first final gear can be relieved by applying small suction force, and the first final gear can rotate and finally transmit power to the driving wheel.

Compared with the prior art, the invention has the advantages that: 1. according to the invention, the energy storage component and the stop component are arranged, the energy storage component is used for storing energy for the actuating component, the stop component is used for limiting the actuating component to work under the action of the energy storage component, so that after the actuating component is stored by the energy storage component, a user inhales at the suction nozzle to release the limit of the stop component on the actuating component, so that medicines can be inhaled, one component is not required to be always pressed while the medicines are inhaled, the operation is labor-saving and convenient, and under the mutual coordination of the energy storage component, the actuating component, the stop component and the suction nozzle, the tank body can obtain a larger driving force to move downwards so as to eject the medicines like liquid; in addition, the user can release the limit of the stop component to the actuating component by using proper suction force, namely, the inhaler can automatically start spraying to enable the medicine to effectively reach the focus part when the user inhales proper air flow, so that the problems of medicine waste or insufficient medicine dosage caused by misoperation of the traditional inhaler are avoided, for example, the user who uses the traditional inhaler triggers the medicine bottle to spray medicine under the condition that the medicine enters the focus part without using enough suction force, so that medicine waste is caused, and the focus part of the user does not inhale medicine with enough dosage, and the inhaler ensures that the reliability of the user inhaling the medicine into the focus part is high; 2. the second air inlet capable of adjusting the air inlet quantity is arranged, so that the inhaler can be suitable for users of different ages and physical conditions, and the problems that users with smaller strength are laborious in medicine inhalation and the users with larger strength cannot inhale the medicine completely into the lung are solved; 3. the wall surface of the stop block contacted with the blocking block is an arc surface, so that the stop block and the blocking block can be separated from contact by applying smaller force to the stop seat, the limit of the stop assembly on the actuating assembly is relieved, and a user can trigger the stop assembly to inhale medicine only by smaller suction force; 4. the tank body is connected with the fixing frame through the clamping structure, and in the state that the sleeve moves out of the shell, the clamping structure is unlocked to enable the tank body to move relative to the fixing frame, so that the medicine bottle can be detached from the shell to be convenient for replacing a new medicine bottle, namely, the inhaler can be reused.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1 (with the housing removed);

FIG. 4 is an exploded view of the structure of part B of FIG. 3;

FIG. 5 is a schematic view of the driving wheel in FIG. 4;

FIG. 6 is a schematic view of the lower housing of FIG. 1;

FIG. 7 is a bottom view of FIG. 1 with the housing removed;

FIG. 8 is a schematic view of the structure of FIG. 1 with the housing removed;

FIG. 9 is a schematic view of the structure of FIG. 8 with the brackets removed;

FIG. 10 is an enlarged view at A of FIG. 2;

FIG. 11 is a schematic view of the dose counter assembly of FIG. 10;

FIG. 12 is a partial schematic view of the structure of FIG. 11;

FIG. 13 is a partial schematic view of the structure of FIG. 12;

FIG. 14 is a schematic view of the drive disk of FIG. 13;

FIG. 15 is a schematic view of the driving rod of FIG. 13;

FIG. 16 is a schematic view of the knob and sleeve of FIG. 2;

FIG. 17 is a schematic view of the primary gear of FIG. 13;

FIG. 18 is a diagram of a test dosing regimen of an inhaler according to an embodiment of the present invention;

FIG. 19 is a diagram of a one-time administration method of an inhaler according to an embodiment of the present invention;

fig. 20 is a diagram showing a method of replacing a medicine bottle of the inhaler according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 20, the inhaler of the present preferred embodiment comprises a housing 1, a medicine bottle 2, a dose counting assembly for displaying the remaining dose in the medicine bottle 2, a power storage assembly, an actuating assembly and a stopper assembly, wherein the medicine bottle 2 is detachably provided in the housing 1 and can move up and down with respect to the housing 1. As shown in fig. 2, in this embodiment, the medicine bottle 2 may be a conventional aerosol can, which has a generally cylindrical can 21, and has an inwardly recessed concave portion 24 on the outer peripheral wall of the can 21, and a valve stem 22 at the mouth of the can 21 protrudes from the mouth of the can 21, and the valve stem 22 always has a tendency to protrude in the protruding direction by a built-in spring, not shown, so that the mouth of the can 21 is normally kept in a closed state; if the body 21 of the inverted aerosol can is depressed against the elastic force of the spring, the valve stem 22 is pressed into the aerosol can, and aerosol containing medicine is ejected from the valve stem 22, wherein the medicine bottle 2 and the valve stem 22 are employed in the prior art, and the operation principle thereof will not be described in detail.

As shown in fig. 1 and 2, the housing 1 is formed by connecting an upper housing 1a and a lower housing 1b, a suction nozzle 11 is formed on the lower housing 1b, and a detachable cover on the suction nozzle 11 is provided with a suction nozzle cover 111 for closing the suction nozzle 11. The medicine bottle 2 is inversely arranged in the shell 1 from top to bottom, the tank body 21 can move downwards relative to the shell 1 under the drive of the actuating component to spray medicine, the valve rod 22 of the tank body is inserted in the spray head 12, the spray head 12 is inserted on the bracket 17 arranged in the lower shell 1b, and the spray head 12 is provided with the spray hole 121 facing the suction nozzle 11, so that the medicine in the medicine bottle 2 is sprayed out from the spray hole 121 and is inhaled by a patient through the suction nozzle 11.

However, the inhalation of the medicament at the mouthpiece 11 while operating the actuation assembly is inconvenient and laborious for the patient, and this problem is solved by providing the energy storage assembly and the stop assembly described above.

The energy storage assembly is connected with the actuating assembly and enables the actuating assembly to have a tendency to drive the medicine bottle 2 downwards, while the stop assembly always has a tendency to contact the actuating assembly to limit the actuating assembly to drive the medicine bottle 2 downwards, and can be separated from contact with the actuating assembly under the driving of the air flow generated by the suction force at the suction nozzle 11 to release the limitation of the actuating assembly. In this way, the patient only needs to store energy to the actuating assembly through the energy storage component, so that the actuating assembly has a tendency to drive the medicine bottle 2 to move downwards, then the suction nozzle 11 is used for sucking air to enable the flowing air flow to drive the stop assembly, so that the stop assembly releases the limit on the actuating assembly, and then the medicine bottle 2 can move downwards to spray medicine under the drive of the actuating assembly. The operation mode does not need to press or operate a certain part all the time, and the operation is labor-saving.

When a user inhales at the suction nozzle 11, the stopper assembly can be driven by the air intake at the gap where the housing 1 is assembled, but it is preferable that the lower housing 1b of the present embodiment is provided with a plurality of air inlets communicating with the suction nozzle 11, and the air flow coming from one of the air inlets can drive the stopper assembly for distinction, and the air inlet is referred to as a first air inlet 13a.

As shown in fig. 3 to 9, the medicine bottle 2 is sleeved with a fixing frame 5 connected with the tank body 21 through a clamping structure, the fixing frame 5 comprises an upper fixing frame 54 and a lower fixing frame 55 which are fixedly connected, the upper fixing frame 54 is encircling the tank body 21, and the lower fixing frame 55 is positioned outside the spray head 12. The energy storage assembly comprises a tightening sleeve 6 and a second torsion spring 61 which are arranged in the shell 1, the tightening sleeve 6 is sleeved outside the upper fixing frame 54, a sleeve 64 is arranged between the tightening sleeve and the upper fixing frame, the sleeve 64 can move up and down relative to the shell 1 and can rotate circumferentially, a knob positioned at the upper part of the shell 1 is formed at the upper end of the sleeve 64, the knob is a mounting rack 641, and the sleeve 64 is connected with the tightening sleeve 6 through a detachable connecting structure. The upper fixing frame 54 is formed with a second elastic fastening foot 53, the second fastening foot 53 is matched with the concave portion 24 of the medicine bottle 2, and the second fastening foot 53 and the concave portion 24 form the above-mentioned fastening structure, that is, after the medicine bottle 2 is inserted into the shell 1, the second fastening foot 53 on the upper fixing frame 54 extends into the concave portion 24 of the medicine bottle 2 to position the medicine bottle 2. However, in order to prevent the medicine bottle 2 from being displaced relative to the upper fixing frame 54 axially under the action of external force, the sleeve 64 is utilized in this embodiment, and when the sleeve 64 is inserted between the tightening sleeve 6 and the upper fixing frame 54, the clamping structure is locked by the sleeve 64, that is, the second buckling leg 53 can be prevented from being sprung outwards, that is, the second buckling leg 53 is firmly limited in the concave portion 24, so that the fixing frame 5 is pressed on the can body 21, and the fixing frame 5 and the can body 21 are relatively fixed in the axial direction.

The detachable connection structure between the sleeve 64 and the tightening sleeve 6 includes an L-shaped groove 65 provided on the inner wall of the tightening sleeve 6 and an insert 642 provided on the outer wall of the sleeve 64, the L-shaped groove 65 extends downward from the upper edge of the tightening sleeve 6, and the insert 642 is inserted into the L-shaped groove 65. So, insert 642 can realize the assembly of sleeve 64 and screw up cover 6 from the vertical section of L type groove 65 to the horizontal segment that slides down, insert 642 can realize the dismantlement of sleeve 64 and screw up cover 6 from the horizontal segment of L type groove 65 to slide into the vertical section and upwards remove, after sleeve 64 upwards shifts out casing 1, the joint structure is unlocked, second detain the foot 53 to the direction of keeping away from medicine bottle 2 pops out, and no longer compress tightly in recessed portion 24, namely the tight fit between second detain foot 53 and the recessed portion 24 disappears, medicine bottle 2 can be shifted out in order to change new medicine bottle 2 from casing 1. Of course, the detachable connection structure between the sleeve 64 and the tightening sleeve 6 is not limited to that shown in this embodiment.

As shown in fig. 8 and 9, the actuating assembly includes a driving wheel 31, a first intermediate gear 33, a first final gear 32, and a blocking block 321, where the first intermediate gear 33 and the first final gear 32 are both disposed on the support 17, the blocking block 321 is disposed on the first final gear 32, a driving tooth portion 311 is circumferentially disposed on the driving wheel 31, and the driving tooth portion 311 and the first final gear 32 are indirectly engaged with each other through at least one first intermediate gear 33, and the first intermediate gear 33 and the first final gear 32 may be dual gears, and of course, the driving tooth portion 311 and the first final gear 32 may also be directly engaged with each other.

The stop assembly comprises a stop seat 4 arranged on the bracket 17 and capable of rotating relative to the bracket 17 (the bracket 17 is fixed on the shell 1), a stop block 41 arranged on the stop seat 4 and a stop plate 44 positioned in a channel between the first air inlet 13a and the suction nozzle 11, wherein the bracket 17 is also provided with a stop plate 171, when the clamping block 321 is in a state of abutting against the stop block 41, the stop plate 44 abuts against the stop plate 171, and the wall surface of the stop block 41 contacted with the clamping block 321 is an arc surface, as shown in fig. 7. Wherein the stop plate 44 of the stop seat 4 is driven to rotate (rotate counterclockwise in fig. 7) relative to the bracket 17 by an air flow (air flow shown by an arrow in fig. 7) entering at the first air inlet 13a or an external force to disengage the catch block 321 from the stop block 41, and the stop seat 4 always has a tendency to rotate under the action of the first torsion spring 42 until the catch block 321 abuts against the stop block 41, and one end of the first torsion spring 42 is connected to the stop seat 4 and the other end is connected to the bracket 17. The stop plate 44 and the stop plate 171 are in gear engagement to prevent the stop seat 4 from rotating under the drive of the first torsion spring 42 to a state in which the blocking block 321 is in gear engagement with the stop block 41, and the stop seat 4 continues to rotate, so that the blocking block 321 is out of contact with the stop block 41 again.

The arc surface design has the advantage that the stop block 41 can release the blocking and matching of the blocking and propping block 321 by applying small force to the stop seat 4, so as to achieve the effect of 'four-two jack pulling'.

The driving wheel 31 and the tightening sleeve 6 are coaxially arranged, and the upper part of the driving wheel 31 is sleeved on the lower part of the tightening sleeve 6, in the embodiment, in the assembled state of the sleeve 64 and the tightening sleeve 6, the knob rotates 180 degrees, the tightening sleeve 6 rotates along with the rotation of the knob in the circumferential direction relative to the shell 1, and a positioning structure which is positioned relative to the shell after the rotation of the tightening sleeve 6 is arranged between the tightening sleeve 6 and the shell 1; and the two ends of the second torsion spring 61 are respectively connected with the tightening sleeve 6 and the driving wheel 31, so that the driving wheel 31 also has a tendency to rotate around the axis of the driving wheel, namely the energy storage assembly completes the energy storage of the actuating assembly. However, due to the blocking engagement between the blocking block 321 and the stop block 41, the driving wheel 31 cannot rotate, and the user needs to inhale at the suction nozzle 11 to rotate the stop seat 4, so that the stop block 41 releases the restriction on the blocking block 321, and then the driving wheel 31 can rotate.

As shown in fig. 3, 4 and 5, the driving wheel 31 rotates to drive the medicine bottle 2 to move downwards through the following transmission structure: the lower part of the driving wheel 31 is sleeved outside the lower fixing frame 55, a first protruding block 312 is arranged on the inner wall of the driving wheel 31, first guide grooves 51 for the sliding fit of the first protruding block 312 are arranged on the outer wall of the lower fixing frame 55, the first guide grooves 51 extend spirally from top to bottom along the circumferential direction of the driving wheel 31, at least two first guide grooves 51 are distributed at intervals along the circumferential direction, a horizontal part 52 for the first protruding block 312 to move from one first guide groove 51 to the other first guide groove 51 is connected between two adjacent first guide grooves 51, and the moving time of the first protruding block 312 on the horizontal part 52 is matched with the spraying time of the medicine bottle 2. Thus, when the driving wheel 31 rotates, the first protruding block 312 rotates along the lower position of the first guiding groove 51 to the higher position side, the first guiding groove 51 is pressed in the process to enable the lower fixing frame 55 to drive the tank body 21 to move downwards, when the first protruding block 312 moves to the horizontal portion 52, the medicine bottle 2 starts to spray medicine, and when the medicine spraying is finished, the first protruding block 312 moves to the upper area of the lower position of the other first guiding groove 51, at the moment, the tank body 21 moves upwards to reset under the action of the built-in spring, the first protruding block 312 is propped against the lower position of the other first guiding groove 51, so that the process is repeated, and the medicine bottle 2 is driven to move downwards to spray medicine as required.

In order to enable a user to know the energy storage condition of the energy storage assembly on the actuating assembly, a fixing piece 18 sleeved on the tightening sleeve 6 is fixedly arranged in the shell 1, and the tightening sleeve 6 can rotate relative to the fixing piece 18. The inner wall of the fixing piece 18 is provided with a buckling groove 15, the outer wall of the tightening sleeve 6 is provided with a first buckling leg 62 which has elasticity and can be buckled into the buckling groove 15, and the first buckling leg 62 and the buckling groove 15 form the positioning structure. When the first fastening pin 62 is fastened in the fastening slot 15, an audible "click" sound can be generated due to the restoring force of the first fastening pin 62 striking the inner wall of the fastening slot 15. Because of the operation difficulty of once only rotating 180 °, in this embodiment, four buckling grooves 15 are uniformly distributed, two first buckling legs 62 are symmetrically arranged, and the tightening sleeve 6 is rotated by half a turn in a clockwise direction when seen in a plan view in fig. 3, so that two clicking sounds can be heard, and at this time, the driving wheel 31 cannot rotate, and the second torsion spring 61 is in an energy storage state. In this state, the front surface of the first leg 62 abuts against the fastening groove 15, so that the tightening sleeve 6 does not rotate counterclockwise (in the top view of fig. 3) to release the energy from the second torsion spring 61.

In addition, the tightening sleeve 6 is circumferentially provided with the identification strip 63, the driving wheel 31 and the housing 1 are respectively provided with the first window 16 in which the identification strip 63 is partially exposed, and of course, the positions of the driving wheel 31 and the housing 1 corresponding to the identification strip 63 may be at least partially made of transparent materials. The indicator strip 63 may be provided as a color-changing strip, such as a red color for the indicator strip 63 at the first window 16 when the actuation assembly is in the stored energy state, and a white color for the indicator strip 63 at the first window 16 after the actuation assembly is completed. Of course, the identification strip 63 may also be in the form of an alphanumeric character, a number, or the like.

As shown in fig. 6 and 7, in order to enable the inhaler to be suitable for users of different ages and different physical conditions, a second air inlet 13b is further disposed at the lower portion of the housing 1 and is communicated with the nozzle 121, a baffle 131 capable of moving relative to the second air inlet 13b is disposed at the second air inlet 13b, and the baffle 131 can shield at least part of the second air inlet 13b. Two guide bars 132 extending from top to bottom are oppositely arranged on the inner wall of the shell 1, the two guide bars 132 are respectively positioned at two sides of the second air inlet 13b, two opposite side walls of the baffle plate 131 are respectively movably inserted into the guide bars 132 at the corresponding sides, and the air inlet amount of the second air inlet 13b is adjusted by moving the baffle plate 131 up and down. For example, for a child, the air intake amount at the second air inlet 13b can be reduced, so that most air flows enter from the first air inlet 13a, and the stop plate 44 of the stop seat 4 is easy to push to rotate so as to release the limit on the actuating assembly, so that the child can ensure that the suction force is enough to enable the medicine to enter the lung without using excessive suction force; for an adult, the air intake amount at the second air inlet 13b may be increased, so that the air flow entering from the first air inlet 13a is smaller, and the user needs to use a larger suction force to rotate the stopping seat 4 to release the restriction on the actuating assembly, otherwise, the adult cannot ensure that the medicine enters the lung when exerting too little force.

Preferably, a scale may be marked at the second air inlet 13b capable of adjusting the amount of air intake to alert the user that the baffle 131 may be moved to a suitable scale. Of course, the number of air intakes is not limited to two.

As shown in fig. 6 to 9, since the medicine ejected from the new vial 2 is mixed with air bubbles when it is just started to be used, the stopper seat 4 is provided with a dial 43 extending out of the housing 1, and the housing 1 is provided with a stopper groove 14 for extending the dial 43 and restricting the movement stroke of the dial 43. The stop seat 4 is rotated counterclockwise in fig. 7 by manually applying force to the dial block 43, and the stop block 41 is driven to rotate to release the restriction on the actuation assembly so as to view the ejected medicine state.

As shown in fig. 10-17, in this embodiment, the knob is a mounting rack 641 having a receiving cavity 6412, and the dose counting assembly includes a counting plate 7, a driving member and a linkage, wherein the driving member is a driving rod 8 capable of moving up and down along with the medicine bottle 2 in the axial direction, and the medicine bottle 2 moves to trigger the counting plate 7 to work or reset to an initial state (i.e. return to zero) by: the driving rod 8 is connected with the counting disc 7 through a linkage device so as to convert the linear motion of the driving rod 8 into the rotary motion of the counting disc 7 for counting, and when the driving rod 8 is separated from the medicine bottle 2, the driving rod 8 can drive the counting disc 7 to be separated from the linkage device, so that the counting disc 7 is reset to an initial state.

In this embodiment, the driving rod 8 can be movably disposed on the mounting rack 641, the lower end of the driving rod 8 abuts against the top of the medicine bottle 2, the upper portion faces the top wall of the mounting rack 641, and the driving rod 8 keeps a downward movement trend under the action of the first elastic member 8a, and the first elastic member 81 is a spring, and two ends of the first elastic member abut against the top wall of the mounting rack 641 and the driving rod 8 respectively.

The counting disc 7 and the linkage device are arranged in the accommodating cavity 6412, and the counting disc 7 is positioned at one side of the driving rod 8 in the radial direction. The linkage device comprises a primary gear 91 and a second final gear 91a which are arranged on the mounting rack 641, the driving rod 8 and the primary gear 91 are connected through a driving structure to drive the primary gear 91 to rotate, the counting disc 7 is provided with a tooth part 71 meshed with the second final gear 91a, the second final gear 91a and the primary gear 91 are in indirect meshed transmission through at least one second intermediate gear 93, and the tooth part 71 and the primary gear 91 can be in direct meshed transmission. The counting disc 7 may also employ an incomplete gear, i.e. a distance between the first and last tooth of the teeth 71, to prevent the dose counting assembly from locking up as the inhaler is still used after it has been used to maximum dose.

The driving structure comprises a driving disc 81, wherein the driving rod 8, the driving disc 81 and the primary gear 91 are coaxially arranged and sequentially arranged from inside to outside, namely, the driving disc 81 is positioned between the driving rod 8 and the primary gear 91. The inner wall of the driving plate 81 is provided with a guide bar 811, the outer peripheral wall of the driving rod 8 is provided with a second guide groove 82 which is spirally arranged from top to bottom in the clockwise direction (in the overlooking direction of fig. 15), and the guide bar 811 is matched with the shape of the second guide groove 82 and is slidably embedded in the second guide groove 82.

When the can 21 moves downward to spray medicine, the driving rod 8 moves downward to the first position under the action of the first elastic member 8a, during this process, the guiding strip 811 moves along the second guiding groove 82 to rotate the driving disc 81 counterclockwise (in the top view direction in fig. 13), and pushing portions 812 are disposed on the peripheral wall of the driving disc 81, in this embodiment, two pushing portions 812 are symmetrically disposed, please refer to fig. 14, and are located on the end portion of the elastic arm 81a extending along the circumferential direction, the front surface of the pushing portion 812 is a plane, the back side is a first guiding inclined plane 812a, and the pushing portion 812 can be close to the center of the driving disc 81 when being pressed radially. While the inner peripheral wall of the primary gear 91 is provided with a plurality of second projections 911 which are circumferentially spaced apart and which are in engagement with the pushing portions 812, the second projections 911 are also provided with second guide slopes 911a which are matched with the back sides of the pushing portions 812. When the driving disk 81 rotates toward the front side of the pushing portion 812, the primary gear 91 can be rotated successively by the front side of the pushing portion 812 abutting against one of the second projections 911, so that the primary gear 91 rotates counterclockwise (in the plan view direction in fig. 13) and finally transmits power to the second final gear 91a by being pushed by the driving disk 81, and the counter disk 7 is rotated.

The mounting frame 641 is provided with a second window 651 in which the counting bar 73 of the counting disk 7 is partially exposed, or at least a part of the mounting frame 641 corresponding to the counting bar 73 is made of transparent material. In addition, the counting disc 7 is connected with a third torsion spring 72, the other end of the third torsion spring 72 is connected with a mounting rack 641, the third torsion spring 72 is a torsion spring capable of being compressed axially, and the third torsion spring 72 stores energy gradually as the counting disc 7 rotates in the counting increasing direction.

When the can 21 moves upward and is in a reset state, the driving rod 8 moves upward under the pushing action of the can 21 to a second position, in the process, the guide bar 811 moves along the second guide groove 82 to enable the driving disc 81 to rotate clockwise (in the overlook direction of fig. 13), the front face of the pushing part 812 is firstly separated from contact with the second bump 911 abutted against the driving bar, when the driving bar rotates to the next second bump 911, the pushing part 812 is radially pressed and then inwards closed under the contact guide of the corresponding first guide inclined face 812a and the second guide inclined face 911a, and when the pushing part 812 passes over the next second bump 911, the front face of the pushing part 812 is abutted against the next second bump 911 under the restoring action of the elastic arm 81a, and at the moment, the driving rod 8 also moves to the second position just. Thus, when the can 21 moves downward again to cause the driving rod 8 to move downward again, the front surface of the pushing portion 812 pushes the next second bump 911 to rotate the driving disk 81 counterclockwise (in the top view direction of fig. 13), and the primary gear 91 can be rotated successively. This is repeated until the medicament in the canister 21 has been used, at which point the counter disk 7 displays the maximum number set.

When the tank 21 moves upward and the driving lever 8 moves upward to the second position, the primary gear 91 is kept stationary; however, when the driving disk 81 rotates clockwise (in the plan view of fig. 13) with respect to the primary gear 91, friction is generated between the driving disk 81 and the primary gear 91 to slightly rotate, and in order to prevent this, the primary gear 91 is provided with a first stopper 912, the mount 641 is provided with a second stopper 6411 having elasticity and engaged with the first stopper 912, and the resistance of the second stopper 6411 is larger than the friction between the driving disk 81 and the primary gear 91 to prevent the clockwise (in the plan view of fig. 13) rotation of the primary gear 91.

When the medicine in the tank 21 needs to be replaced with a new medicine bottle 2 after the medicine is used, in order to continue to use the dose counting assembly, a deflector rod 84 extending radially to the upper part of the counting disc 7 is further arranged on the driving rod 8, the driving rod 8 moves downwards under the action of the first elastic piece 8a until reaching a third position in the state that the medicine bottle 2 moves out of the shell 1, the counting disc 7 moves downwards under the pushing of the deflector rod 84 until being disengaged from the second final gear 91a in the process, and at the moment, the counting disc 7 rotates reversely under the action of the third torsion spring 72 to return to the initial state. The travel of the drive lever 8 to the third position is greater than the travel of the drive lever 8 to the first position, and the toggle lever 84 is located above the counter disk 7 when the drive lever 8 is moved to the first position.

When the newly replaced medicine bottle 2 is loaded, the driving lever 8 is moved upward to the second position by the pushing of the medicine bottle 2, and at this time the counter plate 7 is moved upward to engage with the second final gear 91a by the third torsion spring 72.

From the above, in the state that the canister 21 moves down to spray medicine, the driving rod 8 moves down to the first position and the counting disc 7 rotates by a certain angle to realize one-time counting; in the case of an upward movement of the tank 21 into the reset state, the drive rod 8 is moved upward into the second position, while the counter disk 7 remains stationary throughout the process; in a state in which the vial 2 is moved out of the housing 1 and out of contact with the drive lever 8, the drive lever 8 is moved down to the third position and the counter disk 7 is reset to an initial state (i.e., zero position) by the third torsion spring 72.

When the inhaler is initially used, the spray state is tested according to the method shown in fig. 18, the knob is rotated clockwise (according to the overlooking direction of fig. 3), the rotation is stopped after two clicking sounds are detected, and at the moment, the red color is displayed at the first window 16 to indicate that the energy storage assembly has completed energy storage work; then the suction nozzle cover 111 is pulled out, the pulling block 43 is pulled to drive the stop seat 4 to rotate anticlockwise according to fig. 7, the stop block 41 leaves the clamping block 321, the actuating component rotates under the action of the second torsion spring 61, the medicine bottle 2 is driven to move downwards, spraying is started, and the spraying state is checked; if the spraying state is normal, the suction nozzle cover 111 is covered back to be ready for the next use, and if the spraying state is abnormal, the knob is rotated again to repeat the above steps.

The method of using the medicine once in practice is as follows in the method shown in fig. 19: 1. firstly, the air inlet quantity of the second air inlet 13b is adjusted to a proper size; 2. then, firstly checking the residual dose in the medicine bottle 2 from the counting disc 7, and replacing the medicine bottle 2 if the residual dose is not available; 3. if the remaining dose exists, the knob is rotated clockwise (according to the overlooking direction of fig. 3), and the rotation is stopped after two clicking sounds are heard, and at the moment, the red color is displayed at the first window 16 to indicate that the energy storage assembly has completed energy storage work; 4. then the suction nozzle cover 111 is pulled out to contain the suction nozzle 11 for forceful suction, at this time, the air flow entering at the first air inlet 13a pushes the stop plate 44 and drives the stop seat 4 to rotate anticlockwise according to fig. 7, the stop block 41 leaves the blocking block 321, the actuating component rotates under the action of the second torsion spring 61 and drives the medicine bottle 2 to move downwards so as to start spraying, and the counting disc 7 rotates in the suction process; 5. after the medicine ejection is completed, the mouthpiece cover 111 is covered back to be ready for the next use.

As shown in fig. 20, the method of replacing the vial 2 is to rotate the knob in the counterclockwise direction (in the plan view of fig. 3) to disengage the insert 642 on the sleeve 64 from the L-shaped groove 65 of the tightening sleeve 6, take out the sleeve 64, then withdraw the vial 2, rotate the counter plate 7 to the reset-zero state after the vial 2 is taken out, then insert a new vial 2, and then return the sleeve 64, and rotate the knob clockwise (in the plan view of fig. 3) to position the insert 642 on the sleeve 64 again on the horizontal section of the L-shaped groove 65 of the tightening sleeve 6 to lock the sleeve 64 in the tightening sleeve 6.

Claims (9)

1. A breath actuated inhaler comprising

A housing (1), wherein a suction nozzle (11) is arranged at the lower part of the housing (1);

the medicine bottle (2) is arranged in the shell (1) from top to bottom and comprises a tank body (21) for storing medicines, a valve rod (22) arranged at the mouth part of the tank body (21) and a spring for resetting the valve rod (22) after being pressed;

the spray head (12) is arranged in the shell (1), a spray hole (121) facing the suction nozzle (11) is formed in the spray head (12), and the valve rod (22) is inserted into the spray head (12);

the actuating assembly is connected with the tank body (21) and can drive the tank body (21) to move downwards relative to the shell (1);

characterized in that it also comprises

The energy storage assembly is connected with the actuating assembly and enables the actuating assembly to have a trend of driving the tank body (21) to move downwards;

the stop component always has a trend of contacting the actuating component to limit the actuating component to drive the tank body (21) to move downwards, and can be separated from the actuating component under the driving of air flow generated by suction force at the suction nozzle (11) so as to release the limit of the actuating component;

the lower part of the shell (1) is provided with a first air inlet (13 a) communicated with the suction nozzle (11), and the air flow in the channel between the first air inlet (13 a) and the suction nozzle (11) can drive the stop component;

the actuating assembly comprises a blocking block (321) and a driving wheel (31) capable of driving the blocking block (321) to rotate, the driving wheel (31) has a tendency of rotating around the axis of the actuating assembly under the action of the energy storage assembly, and the tank body (21) can move downwards to spray medicine along with the rotation of the driving wheel (31) through a transmission structure;

the stop assembly comprises a stop seat (4) and a stop block (41) which is arranged on the stop seat (4) and is matched with the blocking block (321), the stop seat (4) is driven by the air flow to rotate relative to the shell (1) so as to enable the blocking block (321) to be separated from contact with the stop block (41), and meanwhile, a first torsion spring (42) is arranged, so that the stop seat (4) always has a trend of rotating until the blocking block (321) is blocked with the stop block (41) under the action of the first torsion spring (42);

the stop assembly further comprises a stop plate (44) positioned in a channel between the first air inlet (13 a) and the suction nozzle (11), a stop plate (171) is arranged in the shell (1), and the stop plate (44) is propped against the stop plate (171) in a state that the clamping and propping block (321) is propped against the stop block (41);

the energy storage assembly comprises a tightening sleeve (6) and a second torsion spring (61) which are arranged in the shell (1), the tightening sleeve (6) and the driving wheel (31) are coaxially arranged, the two ends of the second torsion spring (61) are respectively connected with the tightening sleeve (6) and the driving wheel (31), the tightening sleeve (6) can rotate around the axis of the tightening sleeve under the action of external force to enable the second torsion spring (61) to store energy, and a positioning structure which is positioned relative to the shell after the tightening sleeve (6) rotates is further arranged between the tightening sleeve (6) and the shell (1).

2. A breath actuated inhaler according to claim 1, wherein: the lower part of the shell (1) is also provided with at least one second air inlet (13 b), a baffle (131) capable of moving relative to the second air inlet (13 b) is arranged at the second air inlet (13 b), and the baffle (131) can shade at least partial second air inlet (13 b).

3. A breath actuated inhaler according to claim 1, wherein: the wall surface of the stop block (41) contacted with the clamping block (321) is an arc surface.

4. A breath actuated inhaler according to claim 1, wherein: the stop seat (4) is provided with a shifting block (43) penetrating out of the shell (1), and the shell (1) is provided with a limiting groove (14) for limiting the moving stroke of the shifting block (43).

5. A breath actuated inhaler according to claim 1, wherein: the utility model discloses a jar, including jar body (21), cover is equipped with mount (5) that link to each other through joint structure between jar body (21), screw up cover (6) cover and locate on mount (5) and be equipped with between the two can relative casing (1) reciprocate and circumference pivoted sleeve (64), be connected through detachable connection structure between sleeve (64) and screw up cover (6) under the state that casing (1) was arranged in to sleeve (64), joint structure is locked by sleeve (64) and makes mount (5) compress tightly on jar body (21) under the state that sleeve (64) shifted out in casing (1), joint structure is unlocked and makes jar body (21) can move relative mount (5).

6. A breath actuated inhaler according to claim 1, wherein: the outer wall of the tightening sleeve (6) is provided with a first elastic buckling pin (62), the inner wall of the shell (1) is provided with a buckling groove (15) for buckling the first buckling pin (62), and the first buckling pin (62) and the buckling groove (15) form the positioning structure.

7. A breath actuated inhaler according to claim 5, wherein: the medicine spraying device is characterized in that a first protruding block (312) is arranged on the inner wall of the driving wheel (31), at least two first guide grooves (51) which are used for the first protruding block (312) to be embedded in a sliding mode are arranged on the outer wall of the fixing frame (5), each first guide groove (51) extends in a circumferential spiral mode from top to bottom, a horizontal portion (52) used for the first protruding block (312) to move from one first guide groove (51) to the other first guide groove (51) is connected between two adjacent first guide grooves (51), and the moving time of the first protruding block (312) on the horizontal portion (52) is matched with the medicine spraying time of the medicine bottle (2), and the first protruding block (312) on the driving wheel (31) and the first guide grooves (51) on the fixing frame (5) form the transmission structure.

8. A breath actuated inhaler according to claim 1, wherein: the tightening sleeve (6) is circumferentially provided with a marking strip (63) for displaying the working state of the energy storage component, the shell (1) is provided with a first window (16) for locally exposing the marking strip (63) or the shell (1) is at least locally made of transparent materials at the position corresponding to the marking strip (63).

9. A breath actuated inhaler according to claim 1, wherein: be equipped with support (17) that are used for installing locking seat (4) in casing (1), actuating assembly still includes first final stage gear (32) of locating on support (17), block (321) are located on first final stage gear (32), be equipped with initiative tooth portion (311) along circumference on action wheel (31), direct meshing transmission or indirect meshing transmission through at least one first intermediate gear (33) of locating on support (17) between initiative tooth portion (311) and first final stage gear (32).