CN209933727U - Dose counting assembly for an inhaler - Google Patents

Abstract

The utility model relates to a dose counting assembly that inhaler was used, including the count dish that is used for showing remaining dose in the medicine bottle and be used for with the driving piece that the medicine bottle in the inhaler linked mutually, its characterized in that: the driving part is a driving rod which can move up and down along the axial direction of the medicine bottle, the driving rod is connected with the counting disc through a linkage device so as to convert the linear motion of the driving rod into the rotary motion of the counting disc to count, and when the driving rod is separated from the medicine bottle, the driving rod can drive the counting disc to be separated from the linkage device so as to enable the counting disc to reset to the initial state. The utility model is used for the count dish that shows remaining dosage in the medicine bottle triggers in order to count through reciprocating of medicine bottle, and convenient accurate and need not extra operation, and under the state that dosage counting assembly and medicine bottle break away from, the count dish can return to zero automatically and reset to initial condition to make dosage counting assembly can used repeatedly.

Description

Dose counting assembly for an inhaler

Technical Field

The invention belongs to the technical field of medical appliances, and particularly relates to a dose counting assembly for an inhaler.

Background

In recent years, with the development and marketing of inhalation drugs, many patients with chronic airway diseases such as bronchial asthma, chronic obstructive pulmonary disease, etc. have controlled their disease state effectively by taking the drug for a long period of time, and in the prior art, patients usually use an inhalation device to perform auxiliary inhalation of the drug without supervision. Especially in cases like asthma it is important for the user to have a reliable record of the level of medicament remaining in the inhaler in order to ensure that it always has a sufficient supply. It is therefore increasingly common for inhalers to be equipped with a dose counter to record the amount of a dose expelled from or held in the inhaler.

As shown in the dosage indicator of the inhaler disclosed in the Chinese utility model patent with the patent number ZL201721350652.3 (publication number CN207871234U), the inhaler comprises a bottom shell and a container for storing a certain amount of medicine fog, one end of the bottom shell is provided with a spray head, the other end of the bottom shell is provided with an opening, the bottom shell is provided with a spray cylinder of which the lower end is communicated with the spray head, the upper end of the spray cylinder extends towards the opening, the lower end of the container is provided with a quantitative valve, the lower end of a valve rod of the quantitative valve is fixed in the upper end of the spray cylinder, the dose indicating structure comprises a fixed basket arranged coaxially with the spray barrel and movable with the container along the spray barrel axis, the unit number wheel disc and the ten number wheel disc are sequentially and rotatably arranged in the fixed basket along the axis of the spray barrel, the unit number wheel disc can rotate relative to the ten number wheel disc, and the unit number wheel disc and the ten number wheel disc rotate in the process that the container is pressed.

Most of the current inhalers are as shown in the above patents, the operation of the dose indicating device is triggered by the movement of the medicine bottle (i.e. the container), but once the medicine bottle is installed in the housing, the medicine bottle cannot be detached, i.e. the inhaler is disposable, so the dose indicating device of this kind of inhaler is discarded after being used once, which causes waste of resources; even if the vial is removably mounted in the housing, the dose indicator device does not have the ability to automatically reset to an initial state (i.e., zero), and therefore the dose indicator device cannot be reused.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a dose counting assembly for an inhaler, which can be triggered to count by a medicine bottle and can be automatically reset to an initial state.

The technical scheme adopted by the invention for solving the technical problems is as follows: a dose counter assembly for an inhaler comprising a counter disk for indicating the number of doses remaining in a vial and a drive member for cooperating with a vial in the inhaler, the assembly comprising: the driving part is a driving rod which can move up and down along the axial direction of the medicine bottle, the driving rod is connected with the counting disc through a linkage device so as to convert the linear motion of the driving rod into the rotary motion of the counting disc to count, and when the driving rod is separated from the medicine bottle, the driving rod can drive the counting disc to be separated from the linkage device so as to enable the counting disc to reset to the initial state.

In order to enable the counting disc to be triggered by the medicine bottle to work and return to zero for the next use, the lower end of the driving rod is used for abutting against the top of the medicine bottle and is provided with a first elastic piece, and the driving rod always keeps a downward moving trend under the action of the first elastic piece;

when the tank body of the medicine bottle moves downwards to the state of spraying medicine, the driving rod moves downwards to a first position and the counting disc rotates for a certain angle;

when the tank body of the medicine bottle moves upwards to a reset state, the driving rod moves upwards to a second position and the counting disc keeps static or continues to rotate for a certain angle;

when the medicine bottle is separated from the driving rod, the driving rod moves downwards to a third position and the counting disc is reset to an initial state under the action of a third torsion spring, and the stroke of the driving rod moving to the third position is larger than that of the driving rod moving to the first position. So remove three distance through the actuating lever, can realize the count of count dish or reset, need not other extra operations, convenient and enable dose counting assembly used repeatedly.

The drive rod can transmit power to the counting disc through various structural forms, preferably, the drive rod is movably arranged on a mounting frame, the linkage device comprises a primary gear and a second final gear which are arranged on the mounting frame, the drive rod and the primary gear are connected through a drive structure, a tooth part meshed with the second final gear is arranged on the counting disc, and the second final gear and the primary gear are directly meshed or indirectly meshed through at least one second intermediate gear for transmission.

The first structural form of the driving structure is as follows: the driving structure comprises a driving disc, the driving rod, the driving disc and the primary gear are coaxially installed and are sequentially arranged from inside to outside, a guide strip is arranged on the inner wall of the driving disc, a second guide groove spirally arranged from top to bottom along the circumferential direction is arranged on the outer circumferential wall of the driving rod, and the guide strip is embedded in the second guide groove in a sliding manner; the outer peripheral wall of the driving disc is provided with an elastic pushing portion, and the inner peripheral wall of the primary gear is provided with a plurality of second lugs which are distributed at intervals along the circumferential direction and matched with the pushing portion in a blocking mode. Through the removal of actuating lever, the gib block slides along the second guide way so that the driving-disc rotates, thereby promotes the rotation of primary gear, and the primary gear finally transmits power to the counting dish.

Preferably, be equipped with the elastic arm that extends along circumference on the periphery wall of driving-disc, the tip of elastic arm is located to the promotion portion, the front of promotion portion is a plane, and the dorsal part is a first direction inclined plane, also be equipped with on the second lug with the first direction inclined plane assorted second direction inclined plane of promotion portion. The primary gear is rotated through the matching of the pushing portion and the second convex block, and the pushing portion is clamped and abutted against different second convex blocks conveniently due to the arrangement of the first guide inclined plane and the second guide inclined plane, so that the primary gear is rotated successively.

The second structural form of the driving structure is as follows: the actuating lever is located to the primary gear cover, the drive structure includes along the radial actuating arm that extends of actuating lever and a plurality of guide block that sets gradually that sets up on the internal perisporium of primary gear along circumference, each guide block includes the first guide block that has first inclined plane portion and the second guide block that has second inclined plane portion that sets up along circumference, first inclined plane portion and second inclined plane portion all top-down along circumference slope and the opposite direction of the two slope, second inclined plane portion is linked together with the first inclined plane portion of adjacent guide block, actuating arm one end links to each other with the actuating lever, and the other end is in coordination with the rotation of drive primary gear with first inclined plane portion and the direction of second inclined plane portion. With the movement of the driving rod, the first and second slope parts are pushed by the driving arm to rotate the primary gear, and the primary gear finally transmits power to the counting disk.

In order to prevent the driving arm from generating interference damage parts when the driving arm pushes the primary gear, the driving arm is movably arranged on the driving rod, a second elastic part which enables the driving arm to always have the trend of moving outwards relative to the radial direction of the driving rod is arranged between the driving arm and the driving rod, and the second elastic part plays a role in buffering.

The first meshing form of the final gear and the counting disc is as follows: tooth portion locates on the count dish periphery wall and count dish one side in the radial direction of locating the actuating lever, be equipped with the driving lever that radially extends to count dish top on the actuating lever is in the in-process of primary importance to third position, count dish is promoted to remove down and is disengaged with second final stage gear at the driving lever, the third torsional spring is the torsional spring that can the axial compression. The structure has few related parts, high working reliability and high working stability of the torsion spring.

The second engagement form of the final gear and the counting disc is as follows: the tooth part is arranged on the inner peripheral wall of the counting disc along the circumferential direction, the rotating part is coaxially arranged at the upper part of the second final-stage gear, at least one tooth capable of being meshed with the tooth part is circumferentially distributed on the outer peripheral wall of the rotating part at intervals, and the top of the counting disc is matched with the top wall of the mounting frame through a clamping protrusion and a clamping groove in a clamping manner;

the counting disc is sleeved on the driving rod, and the counting disc can move downwards along with the driving rod to separate the clamping protrusion from the clamping groove only in the process that the driving rod is positioned at the first position to the third position; the third torsional spring is the torsional spring that can axial compressed, the count dish has upward movement all the time under this third torsional spring effect and makes the protruding card of card locates the trend in the draw-in groove.

In order to separate the convex part from the clamping groove and reset the counting disc, the center of the counting disc is downwards sunken to form a groove, the upper end of the driving rod penetrates through the counting disc and is positioned in the groove, a fourth stop block positioned in the groove is arranged at the upper part of the driving rod, and the counting disc is pushed by the fourth stop block to separate the clamping convex part from the clamping groove in the process that the driving rod is positioned from the first position to the third position.

In order to prevent the counting disc from excessively rotating when resetting, a third stop block extending along the vertical direction is arranged on the side wall of the groove, and the third stop block and the fourth stop block are matched in a blocking mode when the counting disc is reset to the initial state.

In order to prevent that continued use of the inhaler after the maximum dose has been used causes the dose counter assembly to lock, the counter disk is provided with said teeth in part.

In order to facilitate the user to check the residual dose in the medicine bottle, the counting disc is provided with a counting strip, the mounting frame is provided with a second window for exposing at least part of the counting strip, or the part of the mounting frame corresponding to the counting strip is made of transparent material at least partially, and the counting strip is used for enabling the user to know the number of times that the residual dose in the medicine bottle can be used.

Compared with the prior art, the invention has the advantages that: 1. the counting disc for displaying the residual dose in the medicine bottle is triggered to count through the up-and-down movement of the medicine bottle, so that the counting is convenient and accurate without additional operation, and the counting disc can automatically return to zero and reset to an initial state under the condition that the dose counting assembly is separated from the medicine bottle, so that the dose counting assembly can be repeatedly used; 2. the dose counting assembly only needs the driving rod, the gear train (linkage device) and the counting disc, and has few parts, is difficult to break down and has high counting accuracy compared with the dose counting assembly with huge parts.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

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

FIG. 3 is an enlarged view of FIG. 2 at A;

FIG. 4 is a schematic view of the dose counter assembly of FIG. 3;

FIG. 5 is a schematic view of a portion of the structure of FIG. 4;

FIG. 6 is a schematic view of a portion of the structure of FIG. 5;

FIG. 7 is a schematic structural view of the drive plate of FIG. 6;

FIG. 8 is a schematic structural view of the drive rod of FIG. 6;

FIG. 9 is a schematic view of the knob and sleeve of FIG. 2;

FIG. 10 is a schematic view of the primary gear of FIG. 3;

FIG. 11 is an exploded view of FIG. 1 (with the housing removed);

FIG. 12 is an exploded view of the structure of part B of FIG. 11;

FIG. 13 is a schematic structural view of the driving wheel in FIG. 12;

FIG. 14 is a schematic structural view of the lower housing of FIG. 1;

FIG. 15 is a bottom view of FIG. 1 with the housing removed;

FIG. 16 is a schematic view of the housing of FIG. 1 with the housing removed;

FIG. 17 is a schematic view of the structure of FIG. 16 with the bracket removed;

FIG. 18 is a chart of a test dosing method for an inhaler according to an embodiment of the present invention;

FIG. 19 is a diagram of a method of administering a single dose of an inhaler in accordance with an embodiment of the present invention;

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

Figure 21 is a cross-sectional view of a dose counter assembly according to embodiment 2 of the present invention;

FIG. 22 is a schematic view of the structure of FIG. 21 with the mounting bracket removed;

FIG. 23 is a schematic view of the primary gear of FIG. 21;

figure 24 is a cross-sectional view of a dose counter assembly according to embodiment 3 of the present invention;

FIG. 25 is a schematic view of the structure of FIG. 24 with the mounting bracket removed;

FIG. 26 is a schematic view of the structure of FIG. 25 in another direction;

FIG. 27 is a schematic view of the counting disc of FIG. 26;

FIG. 28 is a schematic structural view of the mounting bracket of FIG. 24;

fig. 29 is a schematic view of the structure of fig. 26 with the counting disk removed.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Example 1

As shown in fig. 1 to 20, the inhaler of the preferred embodiment includes a housing 1, a medicine bottle 2 and a dose counting assembly for displaying the remaining dose in the medicine bottle 2, wherein the medicine bottle 2 is detachably disposed in the housing 1 and can move up and down relative 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 substantially cylindrical can 21, a recessed portion 24 recessed inward is formed on the outer peripheral wall of the can 21, a stem 22 at the mouth of the can 21 protrudes from the mouth of the can 21, and the stem 22 has a tendency to extend outward in the protruding direction by an internal spring not shown in the figure, so that the mouth of the can 21 is normally kept in a closed state; if the can body 21 of the inverted aerosol can is pressed down against the elastic force of the spring, the stem 22 is pressed into the aerosol can, and the aerosol containing the medicine is ejected from the stem 22, wherein the medicine bottle 2 and the stem 22 adopt the prior art, and the working principle thereof is not described in detail.

As shown in fig. 3-10, the dose counting assembly includes a counting disc 7, a driving member and a linkage, wherein the driving member is a driving rod 8 capable of moving up and down along an axis with the medicine bottle 2, and the medicine bottle 2 moves to trigger the counting disc 7 to work or reset to an initial state (i.e. zero) in the following manner: the driving rod 8 is connected with the counting disc 7 through a linkage device 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 the initial state

In this embodiment, the upper portion of the housing 1 is provided with an installation frame 641 having a receiving cavity 6412, the driving rod 8 is movably disposed on the installation frame 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 installation frame 641, and the driving rod 8 keeps a downward movement trend under the action of a first elastic member 8a, the first elastic member 8a is a spring, and two ends of the first elastic member respectively abut against the top wall of the installation frame 641 and the driving rod 8.

The counting disc 7 and the linkage device are both arranged in the accommodating cavity 6412, and the counting disc 7 is positioned on 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 frame 641, the driving rod 8 and the primary gear 91 are connected through a driving structure to drive the primary gear 91 to rotate, a tooth part 71 which is meshed with the second final gear 91a is arranged on the counting disc 7, the second final gear 91a and the primary gear 91 are indirectly meshed through at least one second intermediate gear 93 for transmission, and the tooth part 71 and the primary gear 91 can also be directly meshed for transmission. The counter disk 7 may also be provided with an incomplete gear, i.e. with a distance between the first and last tooth of the teeth 71, to prevent the dose counter assembly from locking up as a result of continued use of the inhaler after the maximum dose has been used.

The driving structure comprises a driving disc 81, the driving disc 8, the driving disc 81 and a primary gear 91 are coaxially mounted and are sequentially arranged from inside to outside, namely, the driving disc 81 is positioned between the driving disc 8 and the primary gear 91. The inner wall of the driving disc 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 along the clockwise direction (the overlooking direction of fig. 8), and the guide bar 811 is matched with the second guide groove 82 in shape and is embedded in the second guide groove 82 in a sliding manner.

When the canister 21 moves downward to spray, the driving rod 8 moves downward to the first position under the action of the first elastic member 8a, in the process, the guide bar 811 moves along the second guide groove 82 to make the driving disk 81 rotate counterclockwise (as viewed from above in fig. 6), and the outer peripheral wall of the driving disk 81 is provided with two pushing portions 812, in this embodiment, the two pushing portions 812 are symmetrically arranged, see fig. 7, and are located at the end of the elastic arm 81a extending along the circumferential direction, the front surface of the pushing portion 812 is a flat surface, the back surface is a first guide inclined surface 812a, and the pushing portion 812 can be close to the center of the driving disk 81 when being radially pressed. The inner peripheral wall of the primary gear 91 is provided with a plurality of second protrusions 911 distributed at intervals along the circumferential direction and matched with the pushing part 812 in a blocking manner, and the second protrusions 911 are also provided with second guide inclined surfaces 911a matched with the back side of the pushing part 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 protrusions 911, so that the primary gear 91 rotates counterclockwise (as viewed from above in fig. 6) under the pushing of the driving disk 81 and finally transmits power to the second final gear 91a, thereby rotating the counting disk 7.

The mounting frame 641 is provided with a second window 651 for partially exposing the counting bar 73 of the counting disc 7, or the mounting frame 641 is at least partially made of transparent material at a position corresponding to the counting bar 73. In addition, the counting plate 7 is connected to the third torsion spring 72, the other end of the third torsion spring 72 is connected to the mounting bracket 641, the third torsion spring 72 is a torsion spring that can be compressed axially, and the third torsion spring 72 gradually stores energy as the counting plate 7 rotates in the direction of increasing the count.

When the can body 21 moves upward to be in a reset state, the driving rod 8 moves upward to a second position under the pushing action of the can body 21, in the process, the guide strip 811 moves along the second guide groove 82 to enable the driving disc 81 to rotate clockwise (in the overlooking direction of fig. 6), the front surface of the pushing part 812 is firstly separated from contact with the second lug 911 abutted against the front surface, when the pushing part 812 rotates to the next second lug 911, the pushing part 812 is radially pressed and then drawn inward through the contact and guide of the corresponding first guide inclined surface 812a and the corresponding second guide inclined surface 911a, when the pushing part 812 passes over the next second lug 911, the front surface of the pushing part 812 is abutted against the next second lug 911 again under the restoring force of the elastic arm 81a, and at this time, the driving rod 8 also moves to the second position exactly. Thus, when the can 21 moves downward again to move the driving rod 8 downward again, the front surface of the pushing portion 812 pushes the next second protrusion 911, so that the driving plate 81 rotates counterclockwise (in the top view of fig. 6), and the primary gear 91 rotates successively. This is repeated until the medicament in the canister 21 is used up, at which point the counter plate 7 displays the set maximum number.

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 disc 81 rotates clockwise (in the top view of fig. 6) relative to the primary gear 91, friction is generated between the two to slightly rotate the primary gear 91, and in order to prevent this, a first stopper 912 is provided on the primary gear 91, a second stopper 6411 having elasticity and engaging with the first stopper 912 is provided on the mounting bracket 641, and the resistance of the second stopper 6411 is greater than the friction between the driving disc 81 and the primary gear 91 to prevent the clockwise (in the top view of fig. 6) rotation of the primary gear 91.

When the medicine in the canister 21 is used up and the medicine bottle 2 needs to be replaced, in order to continue to use the dose counting assembly, a driving lever 84 extending radially above the counting disc 7 is further provided on the driving lever 8, the driving lever 8 moves downward to a third position under the action of the first elastic member 8a in a state that the medicine bottle 2 is removed from the housing 1, and in a process that the driving lever 8 is in the first position to the third position, the counting disc 7 moves downward under the action of the driving lever 84 until being disengaged from the second final-stage gear 91a, and at this time, the counting disc 7 rotates in the opposite direction to return to the initial state under the action of the third torsion spring 72. The stroke of the driving rod 8 moving to the third position is larger than the stroke of the driving rod 8 moving to the first position, and when the driving rod 8 moves to the first position, the shift lever 84 is located above the counting plate 7.

When a new vial 2 is loaded, the driving rod 8 moves upward to the second position under the urging of the vial 2, and the counting plate 7 moves upward to engage with the second final stage gear 91a under the action of the third torsion spring 72.

From the above, in the state that the tank body 21 moves downwards to spray the medicine, the driving rod 8 moves downwards to the first position and the counting disc 7 rotates for a certain angle to realize one-time counting; when the tank 21 moves upwards to the reset state, the driving rod 8 moves upwards to the second position and the counting disc 7 is kept still all the time in the process; in a state where the medicine bottle 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 plate 7 is reset to the initial state (i.e., zero position) by the third torsion spring 72.

As shown in fig. 1, 2, 11-17, the connecting structure for disengaging the medicine bottle 2 from the driving rod 8 and the actuating assembly for driving the can 21 to move downward can have various structures, such as one of the following embodiments.

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 suction nozzle cover 111 for closing the suction nozzle 11 is detachably covered on the suction nozzle 11. The medicine bottle 2 is upside down arranged in the shell 1, the can 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 can body is inserted in the spray head 12, the spray head 12 is inserted on the bracket 17 arranged in the lower shell, and the spray head 12 is provided with a 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 operation of the actuating assembly and the inhalation of the medicament at the mouthpiece 11 are inconvenient and laborious for the patient, and this problem is solved by the provision of the energy storage assembly and the stop assembly as described above.

The energy storage assembly is connected to the actuating assembly and provides the actuating assembly with a tendency to drive the vial 2 downward, while the stop assembly always has a tendency to contact the actuating assembly to limit the downward movement of the vial 2 by the actuating assembly, and the stop assembly can be moved out of contact with the actuating assembly to release the limit of the actuating assembly by the airflow generated by the suction force at the suction nozzle 11. In this way, the patient can simply charge the actuating assembly with energy via the energy storage member, so that the actuating assembly has a tendency to drive the medicament bottle 2 downwards, and then inhale at the suction nozzle 11 to drive the stopper assembly with the flowing air flow, so that the stopper assembly is free from the restriction of the actuating assembly, and then the medicament bottle 2 can be moved downwards to eject the medicament under the drive of the actuating assembly. This mode of operation need not to press or operate certain part all the time, and the operation is comparatively laborsaving.

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

As shown in fig. 11 to 17, the fixing frame 5 connected to the tank 21 through a clamping structure is sleeved on the medicine bottle 2, the fixing frame 5 includes an upper fixing frame 54 and a lower fixing frame 55 which are fixedly connected, the upper fixing frame 54 surrounds the tank 21, and the lower fixing frame 55 is located outside the spray head 12. Energy storage component is including locating screwing up cover 6 and second torsional spring 61 in casing 1, screws up cover 6 cover and locates outside the upper fixed frame 54 and be equipped with sleeve 64 between the two, and sleeve 64 can reciprocate and can circumferential direction casing 1 relatively, and sleeve 64 upper end shaping has the knob that is located casing 1 upper portion, and this knob is mounting bracket 641 promptly, and sleeve 64 and screwing up cover 6 are connected through the connection structure that can dismantle. The upper fixing frame 54 is formed with a second elastic buckling leg 53, the second buckling leg 53 is matched with the concave portion 24 of the medicine bottle 2, and the matching of the second buckling leg 53 and the concave portion 24 forms the above-mentioned clamping structure, that is, after the medicine bottle 2 is inserted into the housing 1, the second buckling leg 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 axially displaced relative to the upper fixing frame 54 by an external force, the sleeve 64 is utilized in the embodiment, when the sleeve 64 is inserted between the tightening sleeve 6 and the upper fixing frame 54, the snap structure is locked by the sleeve 64, that is, the second fastening leg 53 is prevented from being sprung outwards, that is, the second fastening leg 53 is firmly limited in the concave portion 24, so that the fixing frame 5 is pressed against the tank body 21, and the fixing frame 5 and the tank body 21 are relatively fixed in the axial direction.

The detachable connection structure between the sleeve 64 and the tightening sleeve 6 comprises an L-shaped groove 65 formed in the inner wall of the tightening sleeve 6 and an insertion block 642 formed in the outer wall of the sleeve 64, wherein the L-shaped groove 65 extends downward from the upper edge of the tightening sleeve 6, and the insertion block 642 is inserted into the L-shaped groove 65. Therefore, the insertion block 642 can slide downwards from the vertical section of the L-shaped groove 65 to enter the horizontal section to assemble the sleeve 64 and the tightening sleeve 6, the insertion block 642 can slide from the horizontal section of the L-shaped groove 65 to enter the vertical section and move upwards to disassemble the sleeve 64 and the tightening sleeve 6, after the sleeve 64 moves upwards out of the shell 1, the clamping structure is unlocked, the second buckling foot 53 pops out in the direction away from the medicine bottle 2 and is not pressed in the concave part 24 any more, namely the tight fit between the second buckling foot 53 and the concave part 24 disappears, and the medicine bottle 2 can be moved out of the shell 1 to replace a new medicine bottle 2. Of course, the detachable connection between the sleeve 64 and the tightening sleeve 6 is not limited to the embodiment shown.

As shown in fig. 16 and 17, the actuating assembly includes a driving wheel 31, a first intermediate gear 33, a first final gear 32, and a blocking block 321, the first intermediate gear 33 and the first final gear 32 are both disposed on the bracket 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, the driving tooth portion 311 and the first final gear 32 are indirectly engaged and driven by at least one first intermediate gear 33, both 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 and driven.

The stop assembly includes a stop seat 4 disposed on the bracket 17 and capable of rotating relative to the bracket 17 (the bracket 17 is fixed on the housing 1), a stop block 41 disposed on the stop seat 4, and a stop plate 44 located in a channel between the first air inlet 13a and the suction nozzle 11, the bracket 17 is further provided with a stop plate 171, when the stop block 321 abuts against the stop block 41, the stop plate 44 abuts against the stop plate 171, please refer to fig. 15, and a wall surface of the stop block 41 contacting with the stop block 321 is an arc surface. The stop plate 44 of the stop seat 4 is driven by the airflow (airflow shown by arrow in fig. 15) coming from the first air inlet 13a or the external force to rotate (rotate counterclockwise in fig. 15) relative to the bracket 17 so as to separate the abutting block 321 from the stop block 41, and the stop seat 4 always has a tendency to rotate until the abutting block 321 abuts against the stop block 41 under the action of the first torsion spring 42, one end of the first torsion spring 42 is connected with the stop seat 4, and the other end is connected with the bracket 17. The blocking and matching function of the stop plate 44 and the stop plate 171 is to prevent the stop seat 4 from rotating under the driving of the first torsion spring 42 until the catch block 321 is in blocking and matching with the stop block 41, and the stop seat 4 continues to rotate to cause the catch block 321 to be out of contact with the stop block 41 again.

The arc surface design has the advantage that the blocking and matching of the stop block 41 to the clamping and abutting block 321 can be released by applying a small force to the stop seat 4, so that the effect of 'four-two shifting jacks' is achieved.

The driving wheel 31 and the tightening sleeve 6 are coaxially arranged, the upper part of the driving wheel 31 is sleeved on the lower part of the tightening sleeve 6, in the embodiment, in the state that the sleeve 64 and the tightening sleeve 6 are assembled, the knob rotates 180 degrees, the tightening sleeve 6 rotates circumferentially relative to the shell 1, 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; 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 of rotating around the axis thereof, i.e. the energy storage assembly completes the energy storage of the actuating assembly. However, due to the interference between the stop 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 of the stop block 321, and then the driving wheel 31 can rotate.

As shown in fig. 12 and 13, the driving wheel 31 rotates to drive the medicine bottle 2 to move downwards through the following transmission structure: the lower portion of the driving wheel 31 is sleeved outside the lower fixing frame 55, the inner wall of the driving wheel 31 is provided with first convex blocks 312, the outer wall of the lower fixing frame 55 is provided with first guide grooves 51 for the sliding embedding of the first convex blocks 312, the first guide grooves 51 spirally extend from top to bottom along the circumferential direction of the driving wheel 31, at least two first guide grooves 51 are circumferentially distributed at intervals, a horizontal portion 52 for the first convex blocks 312 to move from one first guide groove 51 to the other first guide groove 51 is connected between every two adjacent first guide grooves 51, and the moving time of the first convex blocks 312 on the horizontal portion 52 is matched with the spraying time of the medicine bottles 2. Thus, when the driving wheel 31 rotates, the first bump 312 rotates to the high side along the lower position of the first guiding groove 51, in the process, the first guiding groove 51 is pressed to make the lower fixing frame 55 drive the tank body 21 to move downwards, when the first bump 312 moves to the horizontal portion 52, the medicine bottle 2 starts to spray medicine, when the medicine spraying is finished, the first bump 312 moves to the upper area of the lower position of the other first guiding groove 51, at this time, the tank body 21 moves upwards under the action of the built-in spring to reset, so that the first bump 312 abuts against the lower position of the other first guiding groove 51, and the process is repeated in this way, 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 to the actuating assembly, a fixing member 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 member 18. The inner wall of the fixing member 18 is provided with a fastening groove 15, the outer wall of the tightening sleeve 6 is provided with a first fastening leg 62 which has elasticity and can be fastened into the fastening groove 15, and the first fastening leg 62 and the fastening groove 15 form the positioning structure. When the first fastening leg 62 is fastened in the fastening slot 15, the restoring force of the first fastening leg 62 will impact the inner wall of the fastening slot 15 to generate an audible 'click' sound. Because of once only rotating 180 operations is comparatively difficult, in this embodiment, the catching grooves 15 equipartition has four, and first knot foot 62 symmetry is provided with two, can hear two sound clicks, and because of the action wheel 31 can not rotate this moment, second torsional spring 61 is in the energy storage state. In this state, since the front surface of the first engaging leg 62 abuts against the engaging groove 15, the tightening sleeve 6 does not rotate counterclockwise (in the plan view of fig. 11) and the second torsion spring 61 is energized.

In addition, the tightening sleeve 6 is circumferentially provided with the identification strip 63, the driving wheel 31 and the housing 1 are both provided with the first window 16 for partially exposing the identification strip 63, and of course, the driving wheel 31 and the housing 1 can be at least partially made of transparent materials at the position corresponding to the identification strip 63. The identification strip 63 may be a color-changing strip, for example, the identification strip 63 at the first window 16 is red when the actuating assembly is in the energy storage state, and the identification strip 63 at the first window 16 is white after the actuating assembly is completed. Of course, the identification bar 63 may be in the form of letters, numbers, etc.

As shown in fig. 14 and 15, in order to adapt the inhaler to users of different ages and different physical conditions, the lower portion of the housing 1 is further provided with a second air inlet 13b communicated with the nozzle 121, the second air inlet 13b is provided with a baffle 131 capable of moving relative to the second air inlet 13b, and the baffle 131 can block at least part of the second air inlet 13 b. Two guide strips 132 extending from top to bottom are oppositely arranged on the inner wall of the shell 1, the two guide strips 132 are respectively positioned at two sides of the second air inlet 13b, two opposite side walls of the baffle 131 are respectively movably inserted into the guide strips 132 at the corresponding sides, and the air inlet volume of the second air inlet 13b is adjusted by moving the baffle 131 up and down. For example, for children, the air inlet amount at the second air inlet 13b can be adjusted to be small, so that most of the air flow enters from the first air inlet 13a, the stop plate 44 of the stop seat 4 is easy to push to rotate to release the limitation on the actuating assembly, and the children can be ensured not to use excessive suction force but also to ensure that the suction force is enough to enable the medicine to enter the lung; for an adult, the air inlet amount at the second air inlet 13b can be adjusted to be larger, so that the air flow entering from the first air inlet 13a is smaller, and a user needs to use a larger suction force to rotate the stop seat 4 to release the restriction of the actuating assembly, otherwise, the adult cannot guarantee that the medicine enters the lung if the force is too small.

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

As shown in fig. 16 and 17, since the medicine ejected from the new medicine bottle 2 is mixed with air bubbles when it is just started to be used, the stopper 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 allowing the dial 43 to extend out and for stopping the movement stroke of the dial 43. The stop block 4 is rotated counterclockwise in fig. 15 by applying a manual force to the dial 43, so as to drive the stop block 41 to rotate to release the restriction of the actuating assembly, so as to check the state of the ejected medicine.

When the inhaler is initially used, the spraying state is tested according to the method shown in fig. 18, the knob is rotated clockwise (in the top view direction of fig. 11), the rotation is stopped after two clicks are heard, and at the moment, red color is displayed on the first window 16 to indicate that the energy storage component finishes the energy storage work; then the mouthpiece cover 111 is pulled off, the shifting block 43 is pulled to drive the stop seat 4 to rotate anticlockwise according to fig. 15, the stop block 41 leaves the clamping block 321, the actuating assembly 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 spray state is normal, the nozzle cover 111 is closed and ready for the next use, and if the spray state is abnormal, the knob is rotated again to repeat the above steps.

The method for taking medicine once in actual use is operated according to the method shown in fig. 19: 1. firstly, adjusting the air inlet volume of the second air inlet 13b to a proper size; 2. then, the residual dosage in the medicine bottle 2 is checked from the counting disc 7, and if the residual dosage is not available, the medicine bottle 2 is replaced; 3. if the residual dose exists, the knob is rotated clockwise (according to the top view direction of fig. 11), the rotation is stopped after two clicks are heard, and at the moment, red color is displayed on the first window 16 to indicate that the energy storage assembly finishes the energy storage work; 4. then the suction nozzle cover 111 is pulled off, the suction nozzle 11 is held to suck air with strength, at the moment, the air flow entering from the first air inlet 13a can push the stop plate 44 and drive the stop seat 4 to rotate anticlockwise according to the figure 15, the stop block 41 leaves the clamping block 321, the actuating assembly 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 air suction process; 5. after the medicament is ejected, the mouthpiece cover 111 is closed back for the next use.

The method of replacing the vial 2 is shown in fig. 20, wherein the knob is rotated counterclockwise (in the top view of fig. 11) to disengage the blocks 642 on the sleeve 64 from the L-shaped grooves 65 of the tightening sleeve 6, the sleeve 64 is removed, the vial 2 is then pulled out, after the vial 2 is removed, the counter plate 7 is rotated to the reset-to-zero state, a new vial 2 is then loaded, the sleeve 64 is then returned, and the knob is rotated clockwise (in the top view of fig. 11) to position the blocks 642 on the sleeve 64 again at the level of the L-shaped grooves 65 of the tightening sleeve 6, so that the sleeve 64 is locked in the tightening sleeve 6.

Example 2

Embodiment 2 is different from embodiment 1 in the driving structure.

As shown in fig. 21 to 23, in the present embodiment, the driving structure includes a driving arm 83 extending along a radial direction of the driving rod 8 and a plurality of guide portions 92 disposed on an inner peripheral wall of the primary gear 91 in sequence along a circumferential direction, each guide portion 92 includes a first guide block 921 having a first inclined surface portion 9211 and a second guide block 922 having a second inclined surface portion 9221, the first inclined surface portion 9211 is disposed on a top portion of the first guide block 921, the second inclined surface portion 9221 is disposed on a bottom portion of the second guide block 922, the first inclined surface portion 9211 and the second inclined surface portion 9221 are both inclined from top to bottom along the circumferential direction and inclined in opposite directions, the second inclined surface portion 9221 is communicated with the first inclined surface portion 9211 of the adjacent guide portion 92, in other words, if the first inclined surface portion 9211 is inclined from top to bottom (from top to bottom direction in the clockwise direction in fig. 23), the second inclined surface portion 9221 is inclined from top to bottom in the counterclockwise direction. The driving arm 83 has one end connected to the driving lever 8 and the other end guided to and engaged with the first and second inclined surface portions 9211 and 9221 to drive the primary gear 91 to rotate.

In this embodiment, a first through groove 923 through which the driving arm 83 passes is provided between the first guide block 921 and the second guide block 922 of each guide portion 92, and a second through groove 924 through which the driving arm 83 passes is provided between each second guide block 922 and the first guide block 921 of the adjacent guide portion 92.

In this embodiment, the driving rod 8 is provided with a mounting groove 85 extending along the radial direction, one end of the driving arm 83 is mounted in the mounting groove 85, the other end of the driving arm 83 is guided and matched with the first inclined plane portion 9211 and the second inclined plane portion 9221, a second elastic member 831 always having a tendency to move radially outward relative to the driving rod 8 is disposed in the mounting groove 85, the second elastic member 831 is a spring, two ends of the second elastic member 831 respectively abut against the mounting groove 85 and the driving arm 83, and the second elastic member 831 plays a role of buffering to prevent interference between the driving arm 83 and the guiding portion 92.

When the driving rod 8 moves downward, the driving arm 83 moves to the lower side along the upper part of the first inclined surface portion 9211 to push the primary gear 91 to rotate counterclockwise (in the top view of fig. 22) by a certain angle, and when the driving rod 8 moves upward, the driving arm 83 moves to the upper side along the lower part of the second inclined surface portion 9221 after passing through the first through groove 923 to push the primary gear 91 to continue rotating counterclockwise (in the top view of fig. 22) by a certain angle, and then reaches the first inclined surface portion 9211 of the next guide portion 92 through the second through groove 924.

As can be seen from the above, during the downward movement of the drive lever 8 to the first position, the drive arm 83 moves along the first ramp portion 9211; during the upward movement of the drive lever 8 to the second position, the drive arm 83 moves along the second ramp portion 9221, i.e., a single counting of the counting disk 7 is completed by a single spraying and resetting of the medicine bottle 2.

Example 3

Embodiment 3 differs from embodiment 1 in the manner in which the counter plate 7 meshes with the second final stage gear 91 a:

as shown in fig. 24 to 29, the inner peripheral wall of the counter disk 7 is partially provided with a tooth portion 71 along the circumferential direction, i.e. there is a certain distance between the first tooth and the last tooth of the tooth portion 71, so as to prevent the dose counting assembly from being locked due to the fact that the inhaler is still used after the inhaler has been used to the maximum dose. A rotating member 91b is coaxially mounted on the upper portion of the second final stage gear 91a, and three teeth 91c capable of meshing with the tooth portion 71 are circumferentially and evenly distributed on the outer peripheral wall of the rotating member 91b at intervals.

The center of the counting disc 7 is recessed downwards to form a groove 75, the upper end of the driving rod 8 penetrates through the counting disc 7 and is positioned in the groove 75, a third stop block 751 extending along the up-down direction is arranged on the inner side wall of the groove 75, and a fourth stop block 86 matched with the third stop block 751 is arranged on the driving rod 8.

In this embodiment, two ends of the first elastic element 8a respectively abut against the top wall 6410 and the driving rod 8 of the mounting frame 641, one end of the third torsion spring 72 is connected to the counting plate 7, the other end of the third torsion spring is connected to the fixing element 6415 fixedly disposed in the accommodating cavity 6412, and the third torsion spring 72 is a torsion spring capable of being compressed in the axial direction. At least one clamping protrusion 7a is disposed on the top of the counting disc 7, a plurality of clamping grooves 6413 which are in snap fit with the clamping protrusions 7a are circumferentially disposed on a top wall 6410 of the mounting frame 641, the clamping protrusion 7a may be disposed on the top wall 6410 of the mounting frame 641, and the clamping grooves 6413 may be disposed on the top of the counting disc 7.

The working process of the driving rod 8 moving to the first position and the second position in this embodiment is substantially the same as that of the first embodiment, except that the driving rod 8 is engaged with the counting disc 7 through the teeth 91c on the rotating member 91b to further push the counting disc 7 to rotate, the locking protrusion 7a is always locked in the locking slot 6413 in the state that the driving rod 8 is at the first position and the second position, the counting disc 7 can be separated from the locking slot 6413 by moving down along with the driving rod 8 in the process that the driving rod 8 is at the first position to the third position, and the counting disc 7 always moves up under the action of the third torsion spring 72 to enable the locking protrusion 7a to be locked in the locking slot 6413.

The operation of moving the driving lever 8 to the third position in this embodiment is as follows:

during the process that the driving rod 8 moves to the third position, the fourth stop 86 moves downwards along with the driving rod 8, and during the process that the driving rod 8 is in the first position to the third position, the fourth stop 86 moves to the bottom wall of the groove 75 and continues to move downwards, so that the counting disc 7 is pushed to move downwards integrally to enable the clamping convex part 7a and the clamping groove 6413 to be disengaged, and the toothless part on the rotating part 91b faces the counting disc 7 when the counting disc 7 finishes the last counting, so that the counting disc 7 rotates in the reverse direction (the rotating direction relative to the counting of the counting disc 7) under the action of the third torsion spring 72 until the third stop 751 and the fourth stop 86 are in blocking engagement, and the counting disc 7 is reset to the zero position.

After a new medicine bottle 2 is filled, the driving rod 8 moves upwards to the second position under the pushing of the medicine bottle 2, in the process, the fourth stop block 86 moves upwards and does not push the bottom wall of the groove 75 any more, and the counting disc 7 also moves upwards under the action of the third torsion spring 72 until the clamping protrusion 7a is clamped and matched with the clamping groove 6413 again.

Claims (11)

1. A dose counter assembly for an inhaler comprising a counter disk (7) for indicating the number of doses remaining in a vial (2) and a drive member for cooperating with a vial (2) in the inhaler, the assembly comprising: the driving piece be one can be along the actuating lever (8) of the up-and-down motion of axial of medicine bottle (2), this actuating lever (8) link to each other with counting dish (7) through aggregate unit, with the linear motion of actuating lever (8) converts the rotary motion of counting dish (7) and counts, and works as under actuating lever (8) breaks away from the state of medicine bottle (2), this counting dish (7) of actuating lever (8) can be driven and the aggregate unit phase separation, and make counting dish (7) reset to initial condition.

2. A dose counter assembly for an inhaler according to claim 1, wherein: the lower end of the driving rod (8) is used for abutting against the top of the medicine bottle (2), and is provided with a first elastic piece (8a), and the driving rod (8) always keeps a downward moving trend under the action of the first elastic piece (8 a);

under the condition that the tank body (21) of the medicine bottle (2) moves downwards to spray medicine, the driving rod (8) moves downwards to a first position and the counting disc (7) rotates for a certain angle;

when the tank body (21) of the medicine bottle (2) moves upwards to a reset state, the driving rod (8) moves upwards to a second position and the counting disc (7) keeps static or continues to rotate for a certain angle;

under the state that medicine bottle (2) and actuating lever (8) break away from mutually, actuating lever (8) move down to the third position and counting dish (7) restore to the initial condition under third torsional spring (72) effect, the stroke that actuating lever (8) moved to the third position is greater than the stroke that actuating lever (8) moved to the first position.

3. A dose counter assembly for an inhaler according to claim 2, wherein: the utility model discloses a counter, including actuating lever (8), drive structure, actuating lever (91) and actuating lever (91), actuating lever (8) activity are located on mounting bracket (641), linkage is including locating primary gear (91) and second final stage gear (91a) on mounting bracket (641), actuating lever (8) and primary gear (91) are connected through the drive structure, be equipped with on counter plate (7) with second final stage gear (91a) engaged with tooth portion (71), second final stage gear (91a) and primary gear (91) direct meshing or through the indirect meshing transmission of at least one second intermediate gear (93).

4. A dose counter assembly for an inhaler according to claim 3, wherein: the driving structure comprises a driving disc (81), the driving disc (8), the driving disc (81) and a primary gear (91) are coaxially installed and are sequentially arranged from inside to outside, a guide strip (811) is arranged on the inner wall of the driving disc (81), a second guide groove (82) which is spirally arranged from top to bottom along the circumferential direction is arranged on the outer circumferential wall of the driving disc (8), and the guide strip (811) is embedded in the second guide groove (82) in a sliding manner; an elastic pushing part (812) is arranged on the outer peripheral wall of the driving disc (81), and a plurality of second convex blocks (911) which are distributed at intervals along the circumferential direction and matched with the pushing part (812) in a blocking mode are arranged on the inner peripheral wall of the primary gear (91).

5. A dose counter assembly for an inhaler according to claim 4, wherein: be equipped with on the periphery wall of driving-disc (81) along elastic arm (81a) that circumference extends, the tip of elastic arm (81a) is located in promotion portion (812), promotion portion (812) openly are a plane, and the dorsal part is a first direction inclined plane (812a), also be equipped with on second lug (911) with the first direction inclined plane (812a) assorted second direction inclined plane (911a) of promotion portion (812).

6. A dose counter assembly for an inhaler according to claim 3, wherein: the primary gear (91) is sleeved on the driving rod (8), the driving structure comprises a driving arm (83) extending along the radial direction of the driving rod (8) and a plurality of guide parts (92) arranged on the inner peripheral wall of the primary gear (91) along the circumferential direction in sequence, each guide part (92) comprises a first guide block (921) with a first inclined plane part (9211) and a second guide block (922) with a second inclined plane part (9221) which are arranged along the circumferential direction, the first inclined surface part (9211) and the second inclined surface part (9221) are inclined from top to bottom along the circumferential direction and the inclination directions of the first inclined surface part and the second inclined surface part are opposite, the second inclined surface portion (9221) communicates with the first inclined surface portion (9211) of the adjacent guide portion (92), one end of the driving arm (83) is connected with the driving rod (8), and the other end of the driving arm is matched with the first inclined surface part (9211) and the second inclined surface part (9221) in a guiding way to drive the primary gear (91) to rotate.

7. A dose counter assembly for an inhaler according to claim 6, wherein: the driving arm (83) is movably arranged on the driving rod (8), and a second elastic part (831) which enables the driving arm (83) to always have the trend of moving outwards relative to the radial direction of the driving rod (8) is arranged between the driving arm and the driving rod.

8. A dose counter assembly for an inhaler according to any of claims 3 to 7, wherein: tooth portion (71) are located count dish (7) periphery wall and count dish (7) and are located the ascending one side in the radial direction of actuating lever (8), be equipped with driving lever (84) that radially extends to count dish (7) top on actuating lever (8) are in the in-process of primary importance to third position, count dish (7) promote down removal and with second final stage gear (91a) disengagement under driving lever (84), third torsional spring (72) are the torsional spring that can axial compressed.

9. A dose counter assembly for an inhaler according to any of claims 3 to 7, wherein: the tooth part (71) is arranged on the inner peripheral wall of the counting disc (7) along the circumferential direction, a rotating part (91b) is coaxially arranged at the upper part of the second final-stage gear (91a), at least one tooth (91c) capable of being meshed with the tooth part (71) is circumferentially distributed on the outer peripheral wall of the rotating part (91b) at intervals, and the top of the counting disc (7) is in snap fit with a top wall (6410) of the mounting frame (641) through a clamping protrusion (7a) and a clamping groove (6413);

the counting disc (7) is sleeved on the driving rod (8), and only in the process that the driving rod (8) is located at the first position to the third position, the counting disc (7) can move downwards along with the driving rod (8) to enable the clamping protrusion (7a) and the clamping groove (6413) to be separated; the third torsion spring (72) is the torsion spring that can the axial compressed, count dish (7) have the upward movement all the time and make under this third torsion spring (72) effect the card is protruding (7a) the card is located the trend in draw-in groove (6413).

10. A dose counter assembly for an inhaler according to claim 3, wherein: the tooth part (71) is locally arranged on the counting disc (7).

11. A dose counter assembly for an inhaler according to claim 3, wherein: be equipped with counting strip (73) on counting dish (7), be equipped with on mounting bracket (641) and supply counting strip (73) at least local second window (651) that expose, perhaps mounting bracket (641) correspond the position of counting strip (73) and be transparent material at least partially.

Images