Dose indicating device for inhaler

Abstract

The invention provides a dose indicating device for an inhaler, which belongs to the technical field of inhaler manufacturing, and comprises a shell and a base which are connected with each other, and further comprises an actuating assembly, a transmission assembly and a dose indicating ring, a dose indicating window and an opening are formed in the side wall of the shell, the actuating assembly comprises an actuating part and a push-pull part which are connected with each other, and the actuating part can penetrate through the opening to transversely move between a first position and a second position. When the actuating assembly moves between a first position and a second position, the actuating assembly drives the transmission gear to rotate, so that the dose indication ring rotates, and dose indication is achieved. The dose indicating device can count and / or indicate the number of times that the fluid container in the inhaler is executed or still available, and has the advantages of being simple in structure, high in error-tolerant rate, good in universality, low in production cost, easy to assemble and test and the like.

Description

Technical Field

[0001] The present application relates to a dose indicating device for an inhaler, and particularly to a dose indicating device for a soft mist inhaler, belonging to the technical field of inhaler manufacturing. Background Art

[0002] An inhaler generally includes a spray assembly. After a replaceable fluid container is installed on the inhaler, the spray assembly pumps out and atomizes the fluid for the user to inhale.

[0003] After installing the fluid container, the user may not be clear about the usage situation of the fluid in the fluid container. When the fluid container stores a medicinal solution for treating chronic or acute symptoms, if continued use is made when the medicinal solution in the fluid container has reached or exceeded the predetermined number of uses, it is very likely that the sprayed dose is unstable, resulting in a medication risk. Therefore, there is an urgent need for a dose indicating device that can display the number of times the fluid container has been used or the remaining number of uses.

[0004] Boehringer Ingelheim developed and launched the propellant-free soft mist inhaler Respimat. The earliest marketed Respimat was a disposable device. Later, RESPIMAT re-usable came out, which has a reusable version. Among them, a replaceable container for containing fluid can be inserted into the upper housing of the nebulizer and is enclosed by the lower housing. By rotating the lower housing, the container moves downward in the nebulizer, and the driving spring can be under tension. At the same time, the fluid is pumped into the pressure chamber of the pressure generator. After manually pressing a button, the container moves upward, the driving spring is released and compresses the pressure chamber, so that the fluid in the pressure chamber is under high pressure and finally atomized through the nozzle. A dose indicating device is connected below the container. The driving part located at the bottom of the lower housing is designed to actuate the indicating device when the container moves relative to the driving part, so that the indicating device can be used to count and / or indicate the number of times the container has been executed or is still available for use. Among them, since actuation is performed by the longitudinal movement of the dose indicating device relative to the driving part, in order to ensure the actuation effect, it is necessary to strictly control the longitudinal dimension of the entire device, especially the distance of the relative movement mentioned above. Therefore, each component needs to be precisely manufactured and assembled. Containers with different filling amounts often have different heights. If they are adapted to the same inhaler, the longitudinal dimensions vary greatly, resulting in a large difference in actuation effect and poor versatility. In addition, the dose indicating device needs to be tested for counting and display after assembly. Since the actuation component in the dose indicating device is completely built-in, during the test process, an additional power source is required to simulate the driving part, and the relative position of the driving part and the actuation component needs to be strictly controlled. Therefore, the difficulty and cost of the test are also relatively high.

[0005] In the prior art, there are also some other types of dose indicating devices, which are designed to achieve the dose indicating function through electronic devices. The use of electronic devices will increase the cost and may have problems with battery life. In addition, these dose indicating devices have a relatively complex structure, require a large number of small mechanical components, are costly, and difficult to assemble. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present application provides a dose indicating device for an inhaler. On the one hand, by providing an opening on the side wall of the housing, the assembly space of some components in the dose indicating device is increased, which is beneficial to assembly. At the same time, an actuating part is provided to penetrate through the opening and at least partially protrude outward from the opening, and the actuating part is partially externally placed, which is beneficial to the testing process. Even without introducing an additional driving part, the tester can directly manually press the actuating part and then observe whether the counting and indication are normal, reducing the testing difficulty and cost. On the other hand, the inner wall of the lower end of the housing contracts inward along the central axis of the housing to form a driving part, which not only simplifies the component structure, but also because the horizontal section of the inner wall of the lower end of the housing is approximately circular, when the dose indicating device is installed on the fluid container, as long as the actuating part faces the inner wall, regardless of the specific direction, it can be actuated by the driving part, facilitating the assembly of the dose indicating device. On the other hand, the dose indicating device provided by the present application is actuated by the relative lateral movement of the actuating part and the driving part, so that the entire device has a higher tolerance rate for the longitudinal dimension, reduces the production precision of the components, is beneficial to the assembly of each component, and is more beneficial to adapting to different specifications of fluid containers. Different specifications of fluid containers often have different heights, and the same product in different batches may also have slight differences in longitudinal dimensions. As long as the housing can accommodate the fluid container connected with the dose indicating device and the actuating part can move laterally between the first position and the second position, it can be effectively actuated to achieve accurate counting, and the precision requirements for the longitudinal dimensions of the entire inhaler (for example, the height of the fluid container, the height of the housing, the distance between the bottom of the housing and the bottom of the dose indicating device, etc.) are relatively low. Therefore, the inhaler can have a higher tolerance rate for different batches of fluid containers, improve the adaptability to different specifications of fluid containers, and improve the versatility of the entire device.

[0007] In a first aspect, the present application provides a dose indicating device for an inhaler, the inhaler including: a housing for receiving a fluid container and a spray assembly for atomizing the fluid, the fluid container being movable relative to the housing, the housing including a driving part for actuating the dose indicating device; the dose indicating device including:

[0008] a housing, the dose indicating device being connected to the fluid container through the housing, and a dose indicating window and an opening being provided on the side wall of the housing;

[0009] A base, which is connected to the housing and forms a cavity between the housing and the base;

[0010] An actuating assembly, which is slidably connected to the base. Under the actuation of the driving part, the actuating assembly can move laterally relative to the base between a first position and a second position. The actuating assembly includes an actuating part and a pushing and pulling part connected to each other. The actuating part penetrates through the opening. When the actuating assembly is in the first position, the actuating part at least partially protrudes out of the opening. When the actuating assembly is in the second position, the actuating part at least partially retracts into the cavity; the pushing and pulling part includes a push rod and is located in the cavity;

[0011] A transmission assembly, which is located in the cavity and includes a transmission shaft and a transmission gear located on the transmission shaft. The transmission gear is arranged opposite to the push rod. Under the action of the push rod, the transmission gear can rotate around the transmission shaft;

[0012] A dose indication ring, which is coaxially arranged with the base and can rotate around the central axis of the base. A scale for displaying a count value is arranged on the outer periphery of the dose indication ring. A protrusion that can interact with the transmission gear is also arranged on the dose indication ring;

[0013] When the actuating assembly moves between the first position and the second position, the push rod drives the transmission gear to rotate, and then the dose indication ring rotates through the protrusion to realize dose indication.

[0014] Further, the fluid container moves up and down relative to the housing, so that the dose indication device moves up and down relative to the housing.

[0015] Further, a fluid container connection part is arranged at one end of the housing away from the base for connecting a fluid container.

[0016] Further, the dose indication window and the opening are arranged opposite to each other.

[0017] Further, to improve the actuation stability of the dose indication device, the dose indication device includes at least two actuating assemblies, and the at least two actuating assemblies are symmetrically arranged with respect to the central axis of the housing. It can be understood that the number and position of the openings match the number and position of the actuating assemblies, and the openings do not affect the dose indication window.

[0018] Preferably, the dose indication device includes two actuating assemblies, and two openings are arranged on the side wall of the housing, and the two openings are respectively located on both sides of the dose indication window.

[0019] Furthermore, to make full use of the structural components of the dose indicating device and improve the aesthetics of the device, it is provided that when the actuating assembly is in the second position, the actuating part is completely retracted into the cavity.

[0020] Furthermore, the pushing and pulling part further includes a connecting rod, the push rod is located at the end of the connecting rod and is fixedly connected to the actuating part through the other end of the connecting rod.

[0021] Preferably, to improve the stability of the interaction between the push rod and the transmission gear, the pushing and pulling part includes two connecting rods arranged in parallel, and the push rod is arranged between the two connecting rods.

[0022] Furthermore, a blocking part is provided on one side of the base facing the housing, and an elastic component is provided between the actuating assembly and the blocking part. One end of the elastic component abuts against the blocking part, and the other end abuts against the actuating assembly.

[0023] Preferably, the elastic component is a spring; more preferably, one end of the spring abuts against the blocking part, and the other end abuts against the side of the actuating part away from the housing.

[0024] Furthermore, the driving part is a convex structure provided inwardly on the inner wall of the housing.

[0025] Preferably, the driving part is a separate component, detachably or fixedly connected to the housing. When the dose indicating device moves relative to the housing, the driving part can cause the actuating assembly to move laterally between the first position and the second position.

[0026] Preferably, to streamline the structure, the driving part is a part of the housing. When the fluid container moves the dose indicating device relative to the housing, the actuating part of the actuating assembly contacts the driving part, and the driving part actuates the actuating part to cause the actuating assembly to move laterally between the first position and the second position.

[0027] More preferably, the inner wall of the lower end of the housing gradually contracts inward along the central axis of the housing to form the driving part. When the actuating assembly is in the first position, the actuating part does not abut against the driving part. When the actuating assembly moves from the first position to the second position, the actuating part abuts against the driving part, and the acting force between the driving part and the actuating part causes the actuating part to be at least partially retracted into the housing.

[0028] Even more preferably, the horizontal section of the inner wall of the lower end of the housing is substantially circular, and the inner wall of the lower end of the housing gradually contracts inward circumferentially along the central axis of the housing to form the driving part.

[0029] Further preferably, the abutting portions of the driving part and the actuating part are matching smooth surfaces.

[0030] Preferably, at least two rib structures are provided on the inner wall of the housing, and a guide groove for the actuating part to move is formed between the rib structures, and the guide groove offsets from top to bottom towards the central axis direction of the housing.

[0031] Further preferably, 2 - 40 rib structures are uniformly provided on the inner wall of the housing; preferably, 2 - 30 rib structures; more preferably, 10 - 30 rib structures; further preferably, 20 - 30 rib structures.

[0032] Furthermore, to reduce the moving resistance, the bottom of the guide groove is a smooth surface, and the surface of the actuating part abutting against the guide groove is a matching smooth surface.

[0033] Furthermore, the dose indicating device further includes a transmission component bracket fixed on the base, and the transmission component is rotatably arranged in the transmission component bracket.

[0034] Furthermore, the protruding part is located at the top of the dose indicating ring and axially extends towards the transmission gear. The transmission gear includes a spiral groove and radially protruding teeth. During the rotation of the transmission gear, at least one protruding part is always engaged in the spiral groove.

[0035] Furthermore, the push rod acts on the teeth, thereby driving the transmission gear to rotate.

[0036] Furthermore, the dose indicating device further includes a detent for preventing the transmission gear from rotating in the reverse direction. The detent is arranged in the cavity and extends towards the transmission gear.

[0037] Preferably, the detent is arranged on the base.

[0038] Further preferably, the blocking part and the detent are the same component.

[0039] Furthermore, the dose indicating device further includes a locking mechanism, which is configured to prevent the actuating part from laterally moving between the first position and the second position and / or prevent further rotation of the dose indicating ring after the fluid container is used a predetermined number of times.

[0040] Preferably, the locking mechanism includes a first locking part located on the actuating component and a second locking part located on the dose indicating ring. After the fluid container is used a predetermined number of times, the second locking part engages with the first locking part to prevent the actuating component from laterally moving between the first position and the second position.

[0041] Further preferably, the first locking portion is located within the cavity and extends towards the top of the dose indicating ring, and the second locking portion is located at the top of the dose indicating ring and extends towards the base. When the fluid container has been used a predetermined number of times, the second locking portion engages with the first locking portion to prevent the actuation assembly from moving laterally between the first position and the second position.

[0042] Further preferably, when the fluid container has been used a predetermined number of times, the locking mechanism prevents the lateral movement of the actuation assembly.

[0043] Further preferably, the second locking portion is located on the path of the lateral movement of the first locking portion, thereby preventing the actuation assembly from moving laterally from the first position to the second position.

[0044] Further preferably, when the fluid container has been used a predetermined number of times, the locking mechanism prevents the actuation assembly from moving laterally from the second position to the first position.

[0045] Furthermore, the dose indicating device further includes an anti-misoperation mechanism which is used to prevent accidental actuation of the dose indicating device before the fluid container is used.

[0046] Even further, the anti-misoperation mechanism is detachably connected to the actuation portion. When the anti-misoperation mechanism is disengaged from the actuation portion, the actuation portion is in an actuatable state.

[0047] Preferably, the anti-misoperation mechanism includes a protrusion, and a groove adapted to the protrusion is provided on the portion of the actuation portion outside the cavity. Before the fluid container is used, the anti-misoperation mechanism is connected to the actuation portion through the protrusion and the groove, so that the actuation portion is in a non-actuatable state.

[0048] Further preferably, the anti-misoperation mechanism includes two protrusions, and two corresponding grooves are provided on the actuation portion.

[0049] In a second aspect, the present application provides a fluid container for an inhaler, and the bottom of the fluid container is connected with the above-mentioned dose indicating device.

[0050] Preferably, the fluid container is fixedly connected to the dose indicating device. When it is necessary to replace the fluid container, the fluid container and the dose indicating device are replaced together.

[0051] In a third aspect, the present application provides an inhaler, and a fluid container connected with the above-mentioned dose indicating device is received in the housing of the inhaler.

[0052] In a fourth aspect, the present application further provides a method for counting and / or indicating the number of times of use that the fluid container in the inhaler has been executed or is still available through the above-mentioned dose indicating device.

[0053] Fifth aspect, the present application further provides a dose indicating device, the dose indicating device having the structure as described in the first aspect of the present application. It can be understood that the dose indicating device can be used in other devices or equipment that require counting and / or display other than inhalers, as long as the device or equipment is provided with a driving part that can actuate the dose indicating device. Similarly, the dose indicating device can be connected to the fluid container through the housing, or can also be connected to other components in the device or equipment through the housing, or even the dose indicating device exists alone in the device or equipment, as long as the driving part can actuate the dose indicating device during the movement that requires counting and / or display.

[0054] In summary, the present application provides a dose indicating device, a fluid container, and an inhaler using the dose indicating device. When the fluid container moves up and down in the housing, the relative lateral movement of the actuating part and the driving part is used to actuate the dose indicating device, so that the entire device has a higher tolerance for the longitudinal dimension. For different products or different batches of the same product, the height of the fluid container is different, the initial position of the fluid container relative to the bottom of the housing after assembly is different, and / or the relative movement distance is different. The present application can convert the up and down movement of the fluid container into the lateral movement of the actuating part in the horizontal direction, and then convert it into a certain angle of rotational movement on the transmission gear, finally realizing effective counting. Compared with traditional products that require precise control of the dimensions of each component, the tolerance of the dose indicating device is increased, the production cost is reduced, and the structure of the entire dose indicating device is simple and has high stability, especially facilitating the adaptation to fluid containers of different specifications and improving the versatility. In addition, the convex design of the actuating part not only facilitates assembly, but also provides convenience for the testing process, reducing the testing difficulty and cost.

[0055] Furthermore, the present application also provides a locking mechanism, which can effectively and firmly lock after the fluid container is used a predetermined number of times, thereby preventing the user from continuing to use the fluid container when the fluid is nearly exhausted or has been exhausted, improving safety, and at the same time reminding the user to replace a new fluid container.

[0056] Even further, the present application also provides an anti-misoperation mechanism, which avoids the accidental actuation of the dose indicating device before the fluid container is used, and is beneficial to ensuring the accuracy of counting and indication. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] To better understand the present application, the present application will be elaborated in detail below with the aid of the drawings. In the drawings:

[0058] Figure 1 is a cross-sectional view of an inhaler of the present application in the initial state;

[0059] Figure 2Cross-sectional view of an inhaler in the actuated state of the present application;

[0060] Figure 3 Cross-sectional view of a housing of an inhaler of the present application;

[0061] Figure 4 Exploded schematic view of a dose indicating device of the present application;

[0062] Figure 5 Cross-sectional view of an assembled dose indicating device of the present application;

[0063] Figure 6 Cross-sectional view of the dose indicating device in the first position;

[0064] Figure 7 Cross-sectional view of the dose indicating device in the second position;

[0065] Figure 8 Cross-sectional view of the dose indicating device after the fluid container has been used a predetermined number of times;

[0066] Figure 9 Cross-sectional view of the dose indicating device in the locked state;

[0067] Figure 10 Schematic view of a dose indicating ring;

[0068] Figure 11 Bottom view of the dose indicating ring;

[0069] Figure 12 Schematic view of a transmission assembly;

[0070] Figure 13 Schematic view of a dose indicating device with an anti-misoperation mechanism;

[0071] Figure 14 Schematic view of an anti-misoperation mechanism of the present application;

[0072] Figure 15 Schematic view of an actuation assembly of the present application.

[0073] Reference numeral description

[0074] 100 Dosage indicating device; 110 Housing; 111 Opening; 112 Dosage indicating window; 113 Fluid container connection part; 120 Dosage indicating ring; 121 Protrusion; 122 Second locking part; 130 Actuating assembly; 131 Actuating part; 1311 Groove; 132 Pushing and pulling part; 1321 Connecting rod; 1322 Push-pull rod; 133 First locking part; 140 Transmission assembly; 141 Transmission shaft; 142 Transmission gear; 1421 Helical groove; 1422 Tooth; 150 Elastic assembly; 160 Base; 161 Transmission assembly bracket; 162 Blocking part; 163 Stopping claw; 164 Dosage indicating ring bracket; 170 Anti-misoperation mechanism; 171 Bump; 200 Housing; 201 Driving part; 300 Fluid container; 400 Spraying assembly; 500 Inhaler. Detailed implementation manners

[0075] To make the technical solutions and achieved technical effects of this application clearer, the following provides a detailed introduction in combination with specific implementation manners, but the implementation manners of this application are not limited thereto.

[0076] In this application, the terms "up and down", "vertical" or "longitudinal" refer to the direction extending from the base 160 to the fluid container connection part 113 (the direction of the central axis of the inhaler 500, or the direction of the central axis of the dosage indicating device 100). In addition, it is defined that Figure 1 and Figure 2 the direction indicated by the arrow A in is the upper direction.

[0077] In this application, the terms "horizontal", "lateral" or "left and right" refer to the direction orthogonal to the "up and down", "vertical" or "longitudinal" direction.

[0078] In this application, the term "outward" refers to the direction pointing outside the cavity formed after the housing 110 and the base 160 are connected; or, relative to the central axis of the inhaler 500 (or the dosage indicating device 100), the direction pointing away from the central axis; for example, when the dosage indicating device 100 is located in the housing 200, the direction from the cavity to the inner wall of the housing 200.

[0079] In this application, the term "inward" refers to the opposite direction to the above-mentioned outward direction.

[0080] In this application, the term "first position" refers to the position of the actuating assembly 130 relative to the base 160 when the part of the actuating part 131 protruding outward from the opening 111 reaches the maximum. At this time, the driving part 201 is disengaged from the actuating assembly 130, or the driving part 201 only touches the actuating assembly 130, but no interaction occurs.

[0081] In the present application, the term "second position" refers to the position of the actuating assembly 130 relative to the base 160 when the portion of the actuating part 131 protruding outward from the opening 111 is minimized. At this time, the interaction force between the driving part 201 and the actuating assembly 130 also reaches the maximum.

[0082] In the present application, the term "maximum width of the dose indicating device" refers to the width of the dose indicating device 100 when the portion of the actuating part 131 protruding outward from the opening 111 is maximized, as Figure 6 the width shown as D1 in

[0083] In the present application, the term "minimum width of the dose indicating device" refers to the width of the dose indicating device 100 when the portion of the actuating part 131 protruding outward from the opening 111 is minimized, as Figure 7 the width shown as D2 in

[0084] In the present application, the terms "clockwise" or "counterclockwise" refer to Figure 5 the rotation direction of the transmission gear 142 as observed from the

[0085] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0086] As Figures 1 to 15 shown, the present application provides a dose indicating device 100, and the dose indicating device 100 can be applicable to a reusable inhaler 500, including but not limited to the re-usable one of Boehringer Ingelheim (BI), or the inhalation device mentioned in the patent document with the application number 201880027066.6.

[0087] Exemplarily, as Figures 1 to 2 shown, the inhaler 500 includes a housing 200 for receiving a fluid container 300 (such as a medicine bottle) and a spray assembly 400 for atomizing the fluid. The fluid container 300 is movable relative to the housing 200. The housing 200 includes a driving part 201. During the process of completing one atomized inhalation using the spray assembly 400, the fluid container 300 completes a reciprocating movement in the longitudinal direction within the inhaler 500, and the driving part 201 is used to drive or actuate the dose indicating device 100 when the fluid container 300 reciprocates. The structures of the inhaler 500, the spray assembly 400, and the fluid container 300 are prior arts and will not be elaborated herein.

[0088] The present application provides a dose indicating device 100 for an inhaler 500, as Figures 1 to 5As shown, it includes a housing 110. The dose indicating device 100 is connected to the fluid container 300 through the housing 110. A dose indicating window 112 and an opening 111 are provided on the side wall of the housing 110. It further includes a base 160. The base 160 is connected to the housing 110 and forms a cavity between the housing 110 and the base 160. In order to adapt to most inhalers 500 and fluid containers 300 on the market, the housing 110 is preferably cylindrical.

[0089] In this embodiment, the dose indicating device 100 is connected to the bottom of the fluid container 300 through the housing 110. When the fluid container 300 moves up and down in the housing 200, it also drives the dose indicating device 100 to move up and down in the housing 200.

[0090] In other embodiments of the present application, the dose indicating device 100 is connected to other positions of the fluid container 300 through the housing 110. For example, the top, one side, or even around the outer periphery of the fluid container 300, etc. As long as the dose indicating device 100 can follow the relative movement between the fluid container 300 and the housing 200, the purpose of the present application can be achieved.

[0091] In an embodiment of the present application, the connection manner between the housing 110 and the fluid container 300 is snap connection. It can be understood that other connection manners, such as direct connection or indirect connection, fixed connection or detachable connection, etc., can all achieve the purpose of the present application.

[0092] The dose indicating device 100 provided by the present application further includes an actuating assembly 130. The actuating assembly 130 is slidably connected to the base 160. Under the actuation of the driving part 201, the actuating assembly 130 can move laterally between a first position and a second position relative to the base 160. The actuating assembly 130 includes an actuating part 131 and a pushing and pulling part 132 connected to each other. The actuating part 131 passes through the opening 111. When the actuating assembly 130 is in the first position, the actuating part 131 at least partially protrudes out of the opening 111. When the actuating assembly 130 is in the second position, the actuating part 131 at least partially retracts into the cavity; the pushing and pulling part 132 includes a push rod 1322 and is located in the cavity.

[0093] In this embodiment, the actuating assembly 130 and the base 160 are connected by a sliding snap connection. Those skilled in the art can understand that as long as the actuating assembly 130 can move laterally on the base 160 while preventing the actuating assembly 130 from completely detaching from the base 160, the actuating assembly 130 and the base 160 can also be slidably connected by other means.

[0094] In this embodiment, the actuating assembly 130 includes an actuating portion 131 and a push-pull portion 132 which are connected to each other. After the actuating portion 131 is actuated by the driving portion 201, the push-pull portion 132 can move laterally between a first position and a second position following the actuating portion 131.

[0095] In a specific embodiment of the present application, the push-pull portion 132 further includes a connecting rod 1321. The push-pull rod 1322 is located at an end of the connecting rod 1321 and is fixedly connected to the actuating portion 131 through the other end of the connecting rod 1321. In other embodiments of the present application, the push-pull rod 1322 can be connected to the actuating portion 131 in other ways. It can be understood that direct connection or indirect connection, fixed connection or detachable connection, etc. can all achieve the purpose of the present application.

[0096] In an embodiment of the present application, as Figure 4 shown, the push-pull portion 132 includes two connecting rods 1321 arranged in parallel. The push-pull rod 1322 is disposed between the two connecting rods 1321, improving the stability of the action between the push-pull rod 1322 and the transmission gear 142.

[0097] The present application provides that the dose indicating device 100 further includes a transmission assembly 140. The transmission assembly 140 is located in the cavity and includes a transmission shaft 141 and a transmission gear 142 located on the transmission shaft 141. The transmission gear 142 is disposed opposite to the push-pull rod 1322. And under the action of the push-pull rod 1322, the transmission gear 142 can rotate around the transmission shaft 141.

[0098] In this embodiment, as Figure 4 and Figure 5 shown, the transmission assembly 140 includes a transmission gear 142 located in the middle of the transmission shaft 141. The push-pull rod 1322 is disposed opposite to the transmission gear 142. When the push-pull portion 132 moves laterally, the push-pull rod 1322 acts on the teeth 1422 of the transmission gear 142, thereby causing the transmission gear 142 to rotate by a certain angle. Specifically, when the push-pull portion 132 moves from the second position to the first position, the push-pull rod 1322 pulls the teeth 1422, causing the transmission gear 142 to rotate counterclockwise (from the Figure 5 shown angle). In other embodiments of the present application, when the push-pull portion 132 moves from the first position to the second position, the push-pull rod 1322 pushes the teeth 1422, causing the transmission gear 142 to rotate clockwise (from the Figure 5 shown angle). It can be understood that as long as the lateral movement of the push-pull portion 132 can be converted into a one-way rotational movement of the transmission gear 142, the purpose of the present application can be achieved.

[0099] In other embodiments of the present application, the transmission assembly 140 includes at least two transmission gears 142, the pushing and pulling portion 132 includes at least one push rod 1322, and the push rod 1322 can act on one or more of the transmission gears 142. In some other embodiments of the present application, the pushing and pulling portion 132 includes at least two push rods 1322, and the at least two push rods 1322 can act on the same transmission gear 142 together, or can act on different transmission gears 142 respectively.

[0100] The present application provides that the dose indicating device 100 further includes a dose indicating ring 120, as Figure 4 shown, the dose indicating ring 120 is coaxially arranged with the base 160 and can rotate around the central axis of the base 160. A scale for displaying the count value is provided on the outer periphery of the dose indicating ring 120 (not shown in the figure), and a protrusion 121 that can interact with the transmission gear 142 is further provided on the dose indicating ring 120. It can be understood that the position of the dose indicating window 112 is correspondingly arranged with the position of the scale.

[0101] In order to define the position of the dose indicating ring 120, a plurality of dose indicating ring brackets 164 are provided on the base 160, and the plurality of dose indicating ring brackets 164 surround the outer periphery or the inner wall of the dose indicating ring 120 to prevent the dose indicating ring 120 from being misaligned.

[0102] In this embodiment, as Figure 5 shown, through the protrusion 121, the rotational movement of the transmission gear 142 in the longitudinal direction can be converted into the rotational movement of the dose indicating ring 120 in the horizontal direction around the central axis of the base 160, and then the scale located on the outer periphery of the dose indicating ring 120 is displayed through the dose indicating window 112, realizing dose indication.

[0103] When the fluid container 300 moves up and down in the inhaler 500 with the dose indicating device 100, the actuating portion 131 on the dose indicating device 100 interacts with the driving portion 201 located on the housing 200, so that the actuating assembly 130 moves laterally between the first position and the second position. At the same time, the push rod 1322 drives the transmission gear 142 to rotate, and then drives the dose indicating ring 120 to rotate through the protrusion 121, realizing dose indication.

[0104] In an embodiment of the present application, the fluid container 300 moves up and down relative to the housing 200, driving the dose indicating device 100 to move up and down relative to the housing 200. Those skilled in the art can understand that the fluid container 300 and the housing 200 can be such that the housing 200 remains stationary while the fluid container 300 moves up and down; or the housing 200 moves up and down while the fluid container 300 remains stationary; or both the fluid container 300 and the housing 200 move up and down.

[0105] In an embodiment of the present application, a fluid container connection portion 113 is provided at one end of the outer shell 110 away from the base 160 for connecting the fluid container 300. In an embodiment of the present application, the connection method is snap connection. It can be understood that other connection methods, such as direct connection or indirect connection, fixed connection or detachable connection, etc., can all achieve the purpose of the present application.

[0106] In an embodiment of the present application, to improve the aesthetics of the device, the dose indicating window 112 and the opening 111 on the outer shell 110 are arranged opposite to each other. It can be understood that in other embodiments of the present application, as long as the dose indicating window 112 and the opening 111 do not affect each other, the purpose of the present application can be achieved.

[0107] In some embodiments of the present application, the dose indicating device 100 includes at least two actuating components 130, and the at least two actuating components 130 are symmetrically arranged with respect to the center axis of the dose indicating device 100, which is beneficial to providing a balanced acting force on the dose indicating device 100 by the driving portion 201 in the actuated state and is beneficial to improving the driving stability of the dose indicating device 100. It can be understood that the number and position of the openings 111 match the number and position of the actuating components 130, and the openings 111 do not affect the dose indicating window 112.

[0108] In a preferred embodiment of the present application, the dose indicating device 100 includes two actuating components 130, and correspondingly, two openings 111 are provided on the side wall of the outer shell 110, and the two openings 111 are respectively located on both sides of the dose indicating window 112. The two actuating components 130 can act on the same transmission component 140 or act on different transmission components 140 respectively.

[0109] In an embodiment of the present application, to make full use of the structural components of the dose indicating device 100 and improve the aesthetics of the device, it is provided that when the actuating component 130 is in the second position, the actuating portion 131 completely retracts from the opening 111 into the cavity.

[0110] In other embodiments of the present application, when the actuating assembly 130 is in the second position, a part of the actuating portion 131 still protrudes outward from the opening 111. However, compared with when it is in the first position, the part of the actuating portion 131 that protrudes outward from the opening 111 is reduced when it is in the second position. Those skilled in the art can understand that as long as the lateral movement of the actuating assembly 130 can be transmitted through the push-pull rod 1322 into the rotation of the transmission assembly 140 at a certain angle, the purpose of the present application can be achieved.

[0111] In an embodiment of the present application, as Figure 4 and Figure 5 shown, a blocking portion 162 protrudes upward on the side of the base 160 facing the housing 110. An elastic component 150 is provided between the actuating assembly 130 and the blocking portion 162. One end of the elastic component 150 abuts against the blocking portion 162, and the other end abuts against the actuating assembly 130.

[0112] In this embodiment, as Figure 7 shown, when the actuating assembly 130 is actuated by the driving portion 201, the driving portion 201 applies a force to the actuating assembly 130, causing the actuating assembly 130 to overcome the action of the elastic component 150 and move from the first position to the second position. When the driving portion 201 moves away from the actuating assembly 130, the force between the driving portion 201 and the actuating assembly 130 continuously decreases. Under the action of the elastic component 150, the actuating assembly 130 returns from the second position to the first position. As Figure 6 shown, when the actuating assembly 130 is in the first position, there is no mutual force between the driving portion 201 and the actuating assembly 130.

[0113] In an embodiment of the present application, as Figure 4 and Figure 5 shown, the elastic component 150 is a spring. One end of the spring abuts against the blocking portion 162, and the other end abuts against the side of the actuating portion away from the housing 200.

[0114] In an embodiment of the present application, the driving portion 201 is an inward protruding structure provided on the inner wall of the housing 200.

[0115] In an embodiment of the present application, as Figures 1 - 2 and Figures 6 - 7As shown, in the initial state, the driving part 201 is disengaged from the actuating assembly 130, and the actuating assembly 130 is in the first position. When the dose indicating device 100 moves downward relative to the housing 200 following the fluid container 300, the raised structure abuts against the actuating part 131 and provides a force to move the actuating part 131 from the first position to the second position. The dose indicating device 100 is in the actuated state. When the dose indicating device 100 moves upward relative to the housing 200, the raised structure disengages from the actuating part 131. Under the action of the elastic assembly 150, the actuating part 131 returns from the second position to the first position, completing a cycle.

[0116] Similarly, in another embodiment of the present application, in the initial state, the driving part 201 abuts against the actuating assembly 130 and provides a force to make the actuating assembly 130 in the second position. When the dose indicating device 100 moves downward relative to the housing 200 following the fluid container 300, the raised structure disengages from the actuating part 131. Under the action of the elastic assembly 150, the actuating part 131 moves from the second position to the first position. When the dose indicating device 100 moves upward relative to the housing 200, the raised structure abuts against the actuating part 131 again, making the actuating part 131 return from the first position to the second position, completing a cycle.

[0117] It can be understood that regardless of whether the actuating assembly 130 is in the first position or the second position in the initial state, as long as it can reciprocate horizontally between the first position and the second position, the object of the present application can be achieved.

[0118] In some embodiments of the present application, the driving part 201 is a separate component, detachably or fixedly connected to the housing 200. When the dose indicating device 100 moves relative to the housing 200, the driving part 201 can make the actuating assembly 130 move horizontally between the first position and the second position.

[0119] In this embodiment, designing the driving part 201 as a separate component can further increase the versatility of the dose indicating device 100, especially facilitating the adaptation to fluid containers 300 with different widths or housings 200 with different inner diameters. During the production process, only by adjusting the size of the driving part 201, fluid containers 300 and dose indicating devices 100 of the same specification can be adapted to housings 200 with different inner diameters, or fluid containers 300 with different diameters and dose indicating devices 100 can be adapted to housings 200 of the same specification, improving the flexibility of the matching between components and reducing the production cost.

[0120] In some embodiments of the present application, for the sake of streamlining the structure, the driving part 201 is a part of the housing 200. When the fluid container 300 moves relative to the housing 200 with the dose indicating device 100, the actuating part 131 of the actuating assembly 130 comes into contact with the driving part 201, and the driving part 201 actuates the actuating part 131, causing the actuating assembly 130 to move laterally between a first position and a second position.

[0121] In an embodiment of the present application, the inner wall at the lower end of the housing 200 gradually contracts inward along the central axis of the housing 200 to form the driving part 201. When the actuating assembly 130 is in the first position, the actuating part 131 does not contact the driving part 201. When the actuating assembly 130 moves from the first position to the second position, the actuating part 131 abuts against the driving part 201, and the acting force between the inner wall and the actuating part 131 causes the actuating part 131 to at least partially retract into the outer shell 110.

[0122] In this embodiment, at least a part of the inner wall at the lower end of the housing 200 gradually contracts to form the driving part 201. When the dose indicating device 100 is installed, the actuating part 131 needs to be corresponding to the driving part 201.

[0123] In a preferred embodiment of the present application, as Figures 1 to 3 shown, the inner wall at the lower end of the housing 200 gradually contracts inward circumferentially along the central axis of the housing 200 to form the driving part 201. In this way, not only the component structure is simplified, but also since the horizontal section of the inner wall at the lower end of the housing 200 is substantially circular, when the dose indicating device 100 is installed on the fluid container 300, as long as the actuating part 131 faces the inner wall of the housing 200, regardless of the specific direction, it can be actuated by the driving part 201, which is beneficial to simplifying the assembly of the dose indicating device 100.

[0124] In this embodiment, as Figure 1As shown, in the initial state, the fluid container 300 and the dose indicating device 100 are in the uppermost position, where the inner diameter of the housing 200 is greater than the maximum width D1 of the dose indicating device, and the actuating portion 131 is in the first position; when the dose indicating device 100 moves downward following the fluid container 300, the inner diameter of the housing 200 gradually decreases. When the inner diameter of the housing 200 is equal to the maximum width D1 of the dose indicating device, the driving portion 201 abuts against the actuating portion 131, and the actuating portion 131 begins to be actuated; as the dose indicating device 100 continues to move downward, the force between the driving portion 201 and the actuating portion 131 slowly pushes the actuating portion 131 away from the housing 200 until the portion of the actuating portion 131 protruding outward from the opening 111 reaches the minimum. At this time, the inner diameter of the housing 200 is equal to the minimum width D2 of the dose indicating device, as Figure 2 shown, the actuating portion 131 is in the second position. When the fluid container 300 and the dose indicating device 100 move upward relative to the housing 200, the inner diameter of the housing 200 gradually increases, the force between the driving portion 201 and the actuating portion 131 gradually becomes smaller until the driving portion 201 is completely disengaged from the actuating portion 131. Under the action of the elastic component 150, the actuating portion 131 returns from the second position to the first position, realizing a cycle.

[0125] In some embodiments of the present application, to reduce the moving resistance, the contact surfaces of the actuating portion 131 and the driving portion 201 are provided as matching smooth surfaces

[0126] In some embodiments of the present application, at least two rib structures are provided on the inner wall of the housing 200, and a guide groove for the actuating portion 131 to move is formed between the rib structures. The guide groove offsets downward and toward the central axis of the housing 200.

[0127] In this embodiment, when the dose indicating device 100 moves downward following the fluid container 300, the actuating portion 131 moves in the guide groove. Since the guide groove offsets downward and toward the central axis of the housing 200, the bottom of the guide groove serves as the driving portion 201, causing the actuating portion 131 to move laterally between the first position and the second position.

[0128] In some embodiments of the present application, 2 - 40 rib structures are uniformly provided on the inner wall of the housing 200; in some embodiments of the present application, 2 - 30 rib structures are uniformly provided on the inner wall of the housing 200; in some embodiments of the present application, 10 - 30 rib structures are uniformly provided on the inner wall of the housing 200; in some preferred embodiments of the present application, 20 - 30 rib structures are uniformly provided on the inner wall of the housing 200. In some embodiments of the present application, the guide grooves formed between the rib structures are offset by the same angle downward toward the central axis of the housing 200, which is beneficial to the assembly of the dose indicating device 100. In some other embodiments of the present application, the angles by which the guide grooves formed between the rib structures are offset downward toward the central axis of the housing 200 are different, which is beneficial to improving the versatility of the device and can be adapted to fluid containers 300 of different widths and dose indicating devices 100 of different widths.

[0129] In some embodiments of the present application, to reduce the moving resistance, the bottom of the guide groove is a smooth curved surface, and the contact surface between the actuating portion 131 and the guide groove is also set to a matching smooth curved surface.

[0130] In some embodiments of the present application, the dose indicating device 100 further includes a transmission component bracket 161 fixed on the base 160, and the transmission component 140 is rotatably arranged in the transmission component bracket 161. The above design enables the transmission shaft 141 to only rotate on the transmission component bracket 161 and cannot move in other directions, and the transmission shaft 141 is parallel to the push rod 1322.

[0131] In an embodiment of the present application, as Figure 5 、 Figures 10 to 12 shown, the protrusion 121 is located at the top of the dose indicating ring 120 and axially extends within the cavity. The transmission gear 142 includes a helical groove 1421 and radially protruding teeth 1422. During the rotation of the transmission gear 142, at least one protrusion 121 is always engaged in the helical groove 1421.

[0132] In this embodiment, a worm drive is formed between the drive gear 142 and the dose indicator ring 120 through the spiral groove 1421 and the protrusion 121, converting the rotational movement of the drive gear 142 in the vertical direction into the rotational movement of the dose indicator ring 120 in the horizontal direction. When the drive gear 142 rotates in the vertical direction, the protrusion 121 moves along the spiral groove 1421, thereby causing the dose indicator ring 120 to rotate in the horizontal direction. And when the previous protrusion 121 moves out of the spiral groove 1421, the next protrusion 121 enters the spiral groove 1421, so that at least one protrusion 121 is always engaged in the spiral groove 1421, ensuring the continuity of the rotational movement of the dose indicator ring 120 in the horizontal direction.

[0133] It can be understood that in other embodiments of the present application, as long as other driving methods can convert the rotational movement of the drive gear 142 in the vertical direction into the rotational movement of the dose indicator ring 120 in the horizontal direction, the purpose of the present application can be achieved.

[0134] In one embodiment of the present application, as Figures 5 to 7 shown, the push-pull rod 1322 acts on the tooth 1422, thereby driving the drive gear 142 to rotate.

[0135] In this embodiment, the push-pull rod 1322 is disposed opposite to the tooth 1422, so that when the push-pull portion 132 moves laterally, the push-pull rod 1322 acts on the tooth 1422 on the drive gear 142, thereby causing the drive gear 142 to rotate by a certain angle. Specifically, when the push-pull portion 132 moves from the first position to the second position, the push-pull rod 1322 does not act on the tooth 1422, or the contact portion between the push-pull rod 1322 and / or the tooth 1422 undergoes elastic deformation, but the drive gear 142 does not rotate; and when the push-pull portion 132 moves from the second position to the first position, the push-pull rod 1322 pulls the tooth 1422, causing the drive gear 142 to rotate counterclockwise (from Figure 5 the shown angle). In other embodiments of the present application, when the push-pull portion 132 moves from the first position to the second position, the push-pull rod 1322 pushes the tooth 1422, causing the drive gear 142 to rotate clockwise (from Figure 5 the shown angle); and when the push-pull portion 132 moves from the second position to the first position, the drive gear 142 does not rotate. It can be understood that as long as the lateral movement of the push-pull portion 132 can be converted into the one-way rotational movement of the drive gear 142, the purpose of the present application can be achieved.

[0136] To ensure the accurate counting of the dose indicating device 100 and prevent the reverse rotation of the transmission gear 142, in an embodiment of the present application, the dose indicating device 100 further includes a detent 163 for preventing the reverse rotation of the transmission gear 142. The detent 163 is disposed within the cavity and extends towards the transmission gear 142.

[0137] In this embodiment, as Figures 5 to 9 shown, the detent 163 is disposed on the base 160, and the detent 163 acts on the tooth 1422 of the transmission gear 142 to ensure that the transmission gear 142 always rotates in one direction.

[0138] In a preferred embodiment of the present application, the blocking portion 162 and the detent 163 are the same component. The component simultaneously has the functions of the blocking portion 162 and the detent 163, which can further streamline the structure of the dose indicating device 100 and reduce the production cost.

[0139] Although the above dose indicating device 100 enables the user to know the usage situation of the fluid container 300, sometimes the user may forget to observe. When the fluid in the fluid container 300 reaches or exceeds the predetermined number of uses, especially when the fluid is nearly exhausted or already exhausted, if the user continues to use the fluid container 300 without timely replacing it with a new one, it is very likely that the ejected dose is different from the predetermined dose, which may cause a medication hazard.

[0140] To avoid the occurrence of the above problems, in some embodiments of the present application, the dose indicating device 100 further includes a locking mechanism. The locking mechanism is configured to prevent the actuation portion 131 from laterally moving between the first position and the second position and / or prevent the further rotation of the dose indicating ring 120 after the fluid container 300 has been used a predetermined number of times.

[0141] In an embodiment of the present application, the locking mechanism includes a first locking portion 133 located on the actuation assembly 130 and a second locking portion 122 located on the dose indicating ring 120. After the fluid container 300 has been used a predetermined number of times, the second locking portion 122 engages with the first locking portion 133 to prevent the actuation assembly 130 from laterally moving between the first position and the second position.

[0142] In this embodiment, as Figure 8 and Figure 9 shown, after the fluid container 300 has been used a predetermined number of times, the second locking portion 122 located on the dose indicating ring 120 rotates to the corresponding position of the first locking portion 133 on the actuation assembly 130, thereby preventing the lateral movement of the actuation assembly 130. At this time, even if the driving portion 201 acts on the actuation portion 131, the actuation assembly 130 cannot laterally move from the first position to the second position.

[0143] Those skilled in the art can understand that as long as the fluid container 300 is used a predetermined number of times, the second locking portion 122 can rotate to the corresponding position of the first locking portion 133 to prevent the lateral movement of the actuating assembly 130 between the first position and the second position, the object of the present application can be achieved. In other embodiments of the present application, when the second locking portion 122 can rotate to the corresponding position of the first locking portion 133, preventing the actuating assembly 130 from laterally moving from the second position to the first position can also achieve the object of the present application.

[0144] In a preferred embodiment of the present application, the first locking portion 133 is located in the cavity and extends towards the top of the dose indicating ring 120, and the second locking portion 122 is located at the top of the dose indicating ring 120 and extends towards the base 160. When the fluid container 300 is used a predetermined number of times, the second locking portion 122 engages with the first locking portion 133 to prevent the lateral movement of the actuating assembly 130 between the first position and the second position. In other embodiments of the present application, the first locking portion 133 and the second locking portion 122 can be located at other positions, such as on the pushing and pulling portion 132, the side wall of the dose indicating ring 120, etc. As long as when the fluid container 300 is used a predetermined number of times, the second locking portion 122 engages with the first locking portion 133 to prevent the lateral movement of the actuating assembly 130 between the first position and the second position, the object of the present application can be achieved.

[0145] In an embodiment of the present application, when the fluid container 300 is used a predetermined number of times, the locking mechanism prevents the lateral movement of the actuating assembly 130.

[0146] In this embodiment, when the fluid container 300 is used a predetermined number of times, the second locking portion 122 rotates to a position where it abuts against the first locking portion 133, preventing any lateral movement of the actuating assembly 130.

[0147] In another preferred embodiment of the present application, as Figure 8 and Figure 9 shown, the second locking portion 122 is located on the path of the lateral movement of the first locking portion 133, thereby preventing the actuating assembly 130 from laterally moving from the first position to the second position.

[0148] In this embodiment, the actuating assembly 130 can undergo partial lateral movement, but cannot complete the lateral movement from the first position to the second position. Under the action of the driving portion 201, the actuating portion 131 retracts into the housing 110, but cannot retract to the second position, and the push rod 1322 cannot cause the transmission gear 142 to rotate a certain angle, and further the dose indicating ring 120 cannot rotate in the horizontal direction, realizing the locking of the dose indicating device 100.

[0149] In this embodiment, when the second locking portion 122 abuts against the first locking portion 133, the actuating portion 131 also provides a reverse acting force to the driving portion 201, preventing the fluid container 300 and the dose indicating device 100 from further moving downward relative to the housing 200, thereby realizing the locking of the inhaler 500.

[0150] In another embodiment of the present application, when the fluid container 300 has been used a predetermined number of times, the locking mechanism prevents the actuating assembly 130 from moving laterally from the second position to the first position. The driving portion 201 cannot effectively actuate the actuating portion 131 again, thereby realizing the locking of the dose indicating device 100.

[0151] To prevent the dose indicating device 100 from being accidentally actuated during production, assembly or transportation, or before the fluid container 300 is installed on the inhaler 500 for atomization administration, resulting in inaccurate counting and display, the dose indicating device 100 further includes an anti-misoperation mechanism 170. Before the fluid container 300 is used, the anti-misoperation mechanism 170 prevents the accidental actuation of the dose indicating device 100.

[0152] In an embodiment of the present application, the anti-misoperation mechanism 170 is detachably connected to the actuating portion 131. When the anti-misoperation mechanism 170 is disengaged from the actuating portion 131, the actuating portion 131 is in a state where it can be actuated.

[0153] In this embodiment, when the anti-misoperation mechanism 170 is connected to the actuating portion 131, the actuating portion 131 is in a state where it cannot be actuated. Even if the driving portion 201 acts on the actuating portion 131, the actuating portion 131 cannot move laterally. Only when the anti-misoperation mechanism 170 is removed from the actuating portion 131 can the actuating portion 131 be normally actuated.

[0154] In a preferred embodiment of the present application, as Figures 13 to 15 shown, the anti-misoperation mechanism 170 includes a protrusion 171, and a groove 1311 adapted to the protrusion 171 is provided on the portion of the actuating portion 131 outside the cavity. Before the fluid container 300 is used, the anti-misoperation mechanism 170 is connected to the actuating portion 131 through the protrusion 171, making the actuating portion 131 in a state where it cannot be actuated.

[0155] In this embodiment, a pin structure is formed between the anti-misoperation mechanism 170 and the actuating portion 131. It can be understood that in other embodiments of the present application, as long as the lateral movement of the actuating portion 131 can be prevented, other detachable connection methods can also achieve the purpose of the present application.

[0156] In a preferred embodiment of the present application, the anti-misoperation mechanism 170 includes two bumps 171, and two grooves 1311 are correspondingly provided on the actuating portion 131. Such a design can prevent the anti-misoperation mechanism 170 from accidentally detaching from the actuating portion 131, and improve the stability of the connection between the anti-misoperation mechanism 170 and the actuating portion 131.

[0157] The above are only the specific embodiments of the present application and are not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of protection of the present application.

Claims

1. A dose indicating device for an inhaler, the inhaler comprising: A housing for receiving a fluid container and a spray assembly for atomizing a fluid, the fluid container being movable up and down relative to the housing, the housing including a driving portion for actuating the dose indicating device; the dose indicating device includes: A housing having a fluid container connection portion provided at one end away from the base for connecting the fluid container, and a dose indicating window and an opening provided on the side wall of the housing; A base connected to the housing and forming a cavity between the housing and the base; An actuating assembly slidably connected to the base, and under the actuation of the driving portion, the actuating assembly can laterally move between a first position and a second position relative to the base. The actuating assembly includes an actuating portion and a push-pull portion connected to each other. The actuating portion passes through the opening. When the actuating assembly is in the first position, at least a part of the actuating portion protrudes outward from the opening. When the actuating assembly is in the second position, at least a part of the actuating portion retracts into the cavity; the push-pull portion includes a push rod and is located in the cavity; A transmission assembly located in the cavity, which includes a transmission shaft and a transmission gear located on the transmission shaft. The transmission gear is disposed opposite to the push rod, and under the action of the push rod, the transmission gear can rotate around the transmission shaft; A dose indicating ring coaxially provided with the base and rotatable around the central axis of the base. A scale for displaying a count value is provided on the outer periphery of the dose indicating ring, and a protrusion capable of interacting with the transmission gear is also provided on the dose indicating ring; When the actuating assembly moves between the first position and the second position, the push rod drives the transmission gear to rotate, and then the dose indicating ring rotates through the protrusion to achieve dose indication.

2. The dosage indication device according to claim 1, characterized in that, A stop portion is provided on the side of the base facing the housing, and an elastic assembly is provided between the actuating assembly and the stop portion. One end of the elastic assembly abuts against the stop portion, and the other end abuts against the actuating assembly.

3. The dosage indicating device according to claim 1 or 2, characterized in that, The driving portion is an inward convex structure provided on the inner wall of the housing.

4. The dosage indication device according to claim 3, characterized in that, The inner wall of the lower end of the housing gradually contracts inward along the central axis of the housing to form a driving portion. When the actuating assembly is in the first position, the actuating portion does not abut against the driving portion. When the actuating assembly moves from the first position to the second position, the actuating portion abuts against the driving portion, and the acting force between the driving portion and the actuating portion causes at least a part of the actuating portion to retract into the housing.

5. The dosage indicating device according to claim 1, characterized in that, The dose indicating device further includes a transmission assembly bracket fixed to the base, and the transmission assembly is rotatably provided in the transmission assembly bracket.

6. The dosage indicating device according to claim 1, characterized in that, The protrusion is located at the top of the dose indicating ring and axially extends towards the transmission gear. The transmission gear includes a spiral groove and radially protruding teeth. During the rotation of the transmission gear, at least one protrusion is always engaged in the spiral groove.

7. The dosage indicating device according to claim 6, characterized in that, The push rod acts on the teeth, thereby driving the transmission gear to rotate.

8. The dosage indication device according to claim 1, characterized in that, The dose indicating device further includes a detent for preventing reverse rotation of the drive gear, the detent being disposed within the cavity and extending toward the drive gear.

9. The dosage indication device according to claim 1, characterized in that, The dose indicating device further includes a locking mechanism configured to prevent lateral movement of the actuating portion between the first position and the second position and / or prevent further rotation of the dose indicating ring after the fluid container has been used a predetermined number of times.

10. The dosage indication device according to claim 1, characterized in that, The dose indicating device further includes an anti-misoperation mechanism for preventing accidental actuation of the dose indicating device before use of the fluid container.

Images