Aerosol actuator and metered dose inhalation device

Abstract

The utility model discloses an aerosol actuator and a quantitative inhalation device. The aerosol actuator comprises a shell and a counting unit, the shell comprises a shell body and a nozzle, and the shell body is communicated with the nozzle; the shell body is used for accommodating the counting unit; the counting unit comprises a gear fixing part, a counting gear, a driving element and an elastic part; a cavity is formed in the gear fixing piece, and the counting gear is arranged in the cavity. The gear fixing piece comprises a cover plate part, and the cover plate part comprises a cover plate part body and a check pawl; a limiting groove is formed in the surface, close to the cover plate part body, of the counting gear; the check pawl is arranged on the cover plate part body and is matched with meshing teeth of the counting gear, so that the rotation direction of the counting gear is limited; the check pawl is provided with a limiting protrusion, and the limiting protrusion is arranged to be matched with the limiting groove so as to limit the rotation direction of the counting gear. The aerosol actuator can improve the counting accuracy.

Description

Technical Field

[0001] The utility model relates to an aerosol actuator and a quantitative inhalation device. Background Art

[0002] Pressure metered dose inhalers (pMDIs) can quantitatively spray drugs in the form of mist, so that the drug particles can directly act on the patient's lungs through the throat, achieving the purpose of efficient drug administration. Pressure metered dose inhalers usually include an aerosol can and an actuator. The aerosol can includes a can body and a valve assembly. The can body contains drugs, which can move relative to the valve assembly. When the can body is pressed down to a certain distance, the can body is opened and mist-like drug particles are sprayed out of the can body. These actions require the cooperation of the aerosol can and the actuator. Some actuators have a counting function, which enables users to know the remaining amount of drugs in the aerosol can and prepare in advance to avoid life-threatening situations caused by lack of drugs.

[0003] CN219642268U discloses a full counting driver, including a housing, an active mechanism and a transmission assembly. The housing is provided with a spray nozzle and a number indicating port. The active mechanism is arranged in the housing. The active mechanism includes a rotating shaft, a number indicating wheel arranged on the outer wall of the rotating shaft, active teeth, an active gear 1 and an active gear 2. The side wall on one side of the number indicating wheel is provided with active teeth, the side wall on the other side of the number indicating wheel is provided with an active gear 1, the side of the outer wall of the active gear 1 away from the active teeth is provided with an active gear 2, and the side of the outer wall of the number indicating wheel close to the active teeth is provided with a connecting groove. The transmission assembly is arranged in the housing, and the transmission assembly includes a guide rod, a spring, and a hook. The guide rod is slidably arranged at the bottom of the base through a spring, a hook is fixedly provided on the guide rod, and a shifting tooth is provided on the outer wall of the hook away from the guide rod. When the transmission assembly of the device is reset, the active mechanism will be reversed, affecting the counting accuracy.

[0004] CN213852556U discloses an aerosol actuator, including a tube body, a counting disk, a one-way gear, an annular guide rail and a toggle mechanism. The annular guide rail is arranged on the front of the tube body, the counting disk is arranged on the annular guide rail, and a circle of racks is arranged on the inner surface of the counting disk. The one-way gear is installed on the front of the tube body through a gear shaft, and a toggle tooth is arranged on the edge of the one-way gear. When the actuator is pressed, the toggle mechanism toggle the one-way gear to rotate one tooth; when the one-way gear rotates ten teeth, the toggle tooth contacts the rack and the counting disk rotates one grid. The counting disk of the actuator cannot accurately count to a single time. Utility Model Content

[0005] In view of this, one object of the utility model is to provide an aerosol actuator, which can improve the accuracy of counting. Further, the aerosol actuator can make full use of the medicine in the aerosol can. Another object of the utility model is to provide a metered dose inhalation device. The utility model adopts the following technical solutions to achieve the above objects.

[0006] The utility model provides an aerosol actuator, comprising a housing and a counting unit;

[0007] The housing comprises a housing body and a nozzle, wherein the housing body is arranged to be in communication with the nozzle; and the housing body is arranged to accommodate the counting unit;

[0008] The counting unit is arranged in the housing body, and the counting unit comprises a gear fixing member, a counting gear, a driving element and an elastic member;

[0009] The interior of the gear fixing member forms a cavity;

[0010] The gear fixing member includes a cover plate portion, and the cover plate portion includes a cover plate portion body and a non-return pawl;

[0011] The counting gear is arranged in the cavity, and a limiting groove is arranged on the surface of the counting gear close to the cover plate body;

[0012] The non-return pawl is connected to the cover plate body, and the non-return pawl is configured to cooperate with the meshing teeth of the counting gear, thereby limiting the rotation direction of the counting gear; a limiting protrusion is provided on the non-return pawl, and the limiting protrusion is configured to cooperate with the limiting groove, thereby limiting the rotation direction of the counting gear;

[0013] The driving element is configured to move under the action of an external force, thereby driving the counting gear to rotate;

[0014] The elastic component is configured to restore the driving element to an initial position when the external force is eliminated.

[0015] According to the aerosol actuator of the utility model, preferably, the numbers displayed on the counting gear respectively correspond to a meshing tooth; and each meshing tooth respectively corresponds to a limiting groove.

[0016] According to the aerosol actuator of the utility model, preferably, the counting unit comprises a linkage gear; the counting gear comprises at least two; two adjacent counting gears are linked by the linkage gear;

[0017] The gear fixing member further comprises a bracket portion matched with the cover plate portion; the bracket portion comprises a bracket portion body and a bracket portion stopper;

[0018] The counting gear comprises a lowest counting position counting gear and a highest counting position counting gear; the lowest counting position counting gear is close to the cover plate body, and the highest counting position counting gear is close to the bracket body;

[0019] The counting gear of the lowest counting position is provided with a limiting groove; the non-return pawl is provided to cooperate with the meshing teeth of the counting gear of the lowest counting position, so as to limit the rotation direction of the counting gear of the lowest counting position;

[0020] The bracket part stopper is arranged on the bracket part body;

[0021] A stopper is provided on the surface of the highest counting position counting gear close to the bracket body; the stopper cooperates with the bracket stopper so that when the highest counting position counting gear counts to 0, the highest counting position counting gear is restricted from rotating in the counting direction.

[0022] According to the aerosol actuator of the utility model, preferably, the linkage gear is arranged between two adjacent counting gears; the counting gear at the lowest counting position is provided with a transmission tooth on one side close to the linkage gear, and is provided with a meshing tooth on one side close to the cover plate body; the counting gears at other lower counting positions are provided with transmission teeth and meshing teeth on both sides respectively; the counting gear at the highest counting position is provided with a meshing tooth on one side close to the linkage gear;

[0023] The linkage gear is configured to be able to mesh with the meshing teeth of the counting gear with a higher counting position among the two adjacent counting gears; the linkage gear and the counting gear are configured to have the following functions: when the counting gear with a lower counting position counts to 0, when the counting gear with a lower counting position counts again, the transmission teeth of the counting gear with a lower counting position drive the linkage gear to rotate, and the linkage gear drives the counting gear with a higher counting position to rotate, and the counting gear with a higher counting position counts once.

[0024] According to the aerosol actuator of the present utility model, preferably, the gear fixing member includes a first fixed shaft and a second fixed shaft; the first fixed shaft and the second fixed shaft are arranged in the cavity, and the first fixed shaft is higher than the second fixed shaft; the first fixed shaft is used to fix the counting gear, and the second fixed shaft is used to fix the linkage gear.

[0025] According to the aerosol actuator of the utility model, preferably, the driving element comprises a main body and a driving pawl;

[0026] The main body is provided with a pressing part; the pressing part is configured to receive an external force to move the main body;

[0027] The driving pawl is connected to the main body, and the driving pawl is configured to drive the counting gear to rotate through the meshing teeth;

[0028] The driving pawl is provided with a deflection bending portion; the deflection bending portion is arranged so that when the counting gear rotates normally, the deflection bending portion does not affect the driving pawl driving the counting gear to rotate, and when the counting gear is locked and an external force acts on the pressing portion, the deflection bending portion produces elastic deformation, so that the driving element moves.

[0029] According to the aerosol actuator of the utility model, preferably, the driving element further comprises a connecting portion, and the gear fixing member is provided with a fixing portion;

[0030] The elastic component is sleeved on the connecting portion, one end of the elastic component is in contact with the main body, and the other end of the elastic component is in contact with the fixing portion;

[0031] The fixing portion is provided with a through hole, and at least a portion of the connecting portion passes through the through hole.

[0032] According to the aerosol actuator of the utility model, preferably, the main body is provided with a first normal limiting structure and a first lateral limiting structure, and the gear fixing member is provided with a second normal limiting structure and a second lateral limiting structure;

[0033] The first normal limiting structure cooperates with the second normal limiting structure to limit the normal movement path of the driving element; the first lateral limiting structure cooperates with the second lateral limiting structure to limit the lateral movement path of the driving element;

[0034] A longitudinal limiting structure is arranged at the lower part of the connecting part, which is arranged to limit the longitudinal displacement of the driving element.

[0035] According to the aerosol actuator of the utility model, preferably, the aerosol actuator further includes a dust cover;

[0036] The shell body is provided with a liquid inlet channel, and the liquid inlet channel has a spray hole; the liquid inlet channel is arranged to be connected with the nozzle through the spray hole;

[0037] The dustproof cover is sleeved on the nozzle.

[0038] On the other hand, the utility model provides a metered dose inhalation device, comprising an aerosol can and the above-mentioned aerosol actuator; at least a portion of the aerosol can is configured to be accommodated in the shell body, and the liquid inlet channel is configured to be connected to the liquid outlet pipe of the aerosol can.

[0039] The aerosol actuator of the utility model has a double check structure to prevent the driving element from driving the counting gear to rotate in the opposite direction of the counting direction when resetting; the structural setting of the limiting protrusion and the limiting groove can also play a positioning role to prevent the user from causing the counting gear to rotate and count due to accidental contact. This can improve the accuracy of counting. According to the preferred technical solution of the utility model, a deflection bending part is provided on the driving element. In this way, after the cumulative count is reduced to 0 times, the driving element can still move, so that the remaining medicine in the aerosol can is fully utilized. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is an exploded view of an aerosol actuator of the utility model.

[0041] Figure 2 for Figure 1 A schematic diagram of the partial structure of the housing of the aerosol actuator is shown.

[0042] Figure 3 for Figure 1 The schematic diagram of the structure of the counting unit of the aerosol actuator is shown.

[0043] Figure 4 for Figure 1 An exploded view of a counting unit of an aerosol actuator is shown.

[0044] Figure 5 for Figure 3 A schematic diagram of the partial structure of the cover portion of the counting unit is shown.

[0045] Figure 6 for Figure 3 A schematic diagram of the partial structure of the units gear of the counting unit shown.

[0046] Figure 7 for Figure 3 A schematic diagram of the partial structure of the driving element of the counting unit shown.

[0047] Figure 8 for Figure 3 The counting unit shown is a schematic structural diagram when viewed from the z-axis direction.

[0048] Fig. 9 The utility model is an exploded view of a quantitative inhalation device.

[0049] Fig.10 Schematic diagram of the assembly structure of the aerosol can and the aerosol actuator.

[0050] The reference numerals are as follows:

[0051] 110-cover plate; 111-first connecting sleeve; 112-second connecting sleeve; 113-check pawl; 114-limiting protrusion; 115-second normal limiting structure; 116-fixing part; 117-cover plate body; 120-bracket; 131-limiting block; 132-second lateral limiting structure; 133-bracket body; 134-top of bracket; 140-display window; 151-unit gear; 1511-unit wheel meshing teeth; 1512-limiting groove; 1513-unit wheel transmission teeth; 152-tens gear; 1521-tens wheel transmission teeth; 153-hundreds gear; 1531-stop part; 161-first linkage gear; 162-second linkage gear; 171- 1-fixed axis; 172-second fixed axis; 181-first positioning column; 182-second positioning column; 183-third positioning column; 184-fourth positioning column; 191-first buckle; 192-second buckle; 2-driving element; 210-main body; 211-pressing part; 212-first normal limiting structure; 213-first lateral limiting structure; 220-driving pawl; 221-flexure bending part; 230-connecting part; 231-longitudinal limiting structure; 3-elastic component; 4-housing; 410-housing body; 411-liquid inlet channel; 412-spray hole; 413-rear wall; 414-observation window; 420-nozzle; 5-counting unit; 6-dust cover; 7-aerosol can; 710-liquid outlet pipe. DETAILED DESCRIPTION

[0052] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0053] The lateral finger of the utility model Figure 3 The x-direction shown in Figure 3 The y direction shown in Figure 3 The z direction shown in .

[0054] <Aerosol Actuator>

[0055] The aerosol actuator of the utility model comprises a housing and a counting unit and, in certain embodiments, further comprises a dust cover.

[0056] Housing and dust cover

[0057] The shell of the utility model comprises a shell body and a nozzle. The shell body is connected with the nozzle. The shell body and the nozzle can be arranged in an "L" shape.

[0058] The shell body is configured to accommodate the aerosol can and the counting unit. The counting unit can be assembled into the shell body by means of a positioning column, a positioning hole, and connecting parts such as a buckle and a slot. This facilitates accurate fixing of the position of the counting unit. The shell body has a rear wall. The rear wall is arranged at a position away from the nozzle. Part of the rear wall can be a detachable structure. The detachable structure can be assembled with other parts of the shell body by snap connection. This facilitates the assembly of the counting unit into the shell body. An observation window can be provided on the rear wall. The projection of the observation window in the plane where the display window is located falls within the range of the display window. The observation window is configured to display the number of usable times of the remaining medicine in the aerosol can. The observation window can be provided on the detachable part of the rear wall.

[0059] The shell body is provided with a liquid inlet channel, which is used to be connected with the liquid outlet pipe of the aerosol can, has a spray hole, and is connected with the nozzle through the spray hole.

[0060] A dust cover is mounted on the nozzle to prevent the nozzle from being contaminated.

[0061] Counting unit

[0062] The counting unit of the utility model comprises a gear fixing part, a counting gear, a driving element and an elastic component. In some embodiments, it also comprises a linkage gear. The following is a detailed description.

[0063] Gear fixings

[0064] The gear fixing member of the utility model forms a cavity inside. The cavity is configured to accommodate a counting gear. In some embodiments, the gear fixing member has a cover portion and a bracket portion. The cover portion includes a cover portion body. The bracket portion includes a bracket portion body and a top portion. The cover portion body and the bracket portion body are arranged relative to each other. A portion of the cover portion body, a portion of the bracket portion body and a portion of the top portion of the bracket portion form a cavity. The cavity may have a display window. The display window is configured to display numbers on the counting gear. The bracket portion body and the top portion may be an integral structure. The cover portion is connected to the bracket portion by a connector. For example, it may be connected by snapping.

[0065] The cover plate portion also includes a check pawl. The check pawl is disposed on the cover plate portion body. The check pawl is configured to cooperate with the meshing teeth of the counting gear to limit the rotation direction of the counting gear. The check pawl can mesh with the meshing teeth of the counting gear, thereby limiting the reverse rotation of the counting gear in the counting direction. When there are multiple counting gears, the check pawl meshes with the meshing teeth of the lowest counting gear (e.g., the units gear). In some embodiments, one end of the check pawl is connected to the cover plate portion body, and the other end of the check pawl is a free end. The free end of the check pawl meshes with the counting gear.

[0066] A limiting protrusion is provided on the non-return pawl. The limiting protrusion is provided to cooperate with the limiting groove of the counting gear (the counting gear of the lowest counting position, such as the units gear) to limit the rotation direction of the counting gear. The limiting protrusion is provided at the free end of the non-return pawl. Specifically, it is provided on the surface of the free end close to the counting gear. The limiting protrusion can be a cylinder, or it can be formed by stacking a plurality of cylinders. When the limiting protrusion is formed by stacking a plurality of cylinders, the plurality of cylinders are stacked in descending order of diameter, wherein the diameter of the cylinder close to the non-return pawl is the largest. In this way, it plays a double limiting role with the non-return pawl, thereby improving the accuracy of counting.

[0067] The gear fixing member includes a fixed shaft, which is located in the cavity of the gear fixing member. The fixed shaft is used to fix the gear. One end of the fixed shaft is fixed to the bracket body, and the other end of the fixed shaft can be fixed to the cover part. In some embodiments, the cover part also includes a connecting sleeve. The connecting sleeve is arranged on the cover body. The connecting sleeve is arranged on the inner surface of the cover body. The other end of the fixed shaft extends into the connecting sleeve, so that the fixed shaft and the cover part are assembled together. This makes it easy to assemble the gear on the fixed shaft.

[0068] In some embodiments, the fixed shaft includes a first fixed shaft and a second fixed shaft. The first fixed shaft is higher than the second fixed shaft. The first fixed shaft is used to fix the counting gear. The second fixed shaft is used to fix the linkage gear.

[0069] The bracket part also includes a bracket part stopper. The bracket part stopper can be arranged on the bracket part body. The bracket part stopper is arranged to be able to cooperate with the stopper, and when the counting gear (the counting gear provided with the stopper) counts to 0, the counting gear is restricted from continuing to count. When the counting gear is a plurality of gears, the bracket part stopper restricts the highest counting position counting gear (for example, the hundreds position gear) from continuing to count. The bracket part stopper can be a convex structure.

[0070] The gear fixing member may be provided with a limit block. The limit block may be provided on the top of the bracket portion. The limit block is provided to limit the position of the counting gear.

[0071] The gear fixing member may be provided with a fixing portion. The fixing portion can abut against the elastic component. The fixing portion is provided with a through hole. At least a part of the connecting portion of the driving element is penetrated in the through hole. The fixing portion may be provided on the cover plate body.

[0072] The gear fixing member may be provided with a second transverse limiting structure. The second transverse limiting structure is arranged to cooperate with the first transverse limiting structure to limit the transverse movement path of the driving element. The second transverse limiting structure may be a dovetail-shaped tenon groove. The second transverse limiting structure may be arranged on the top of the bracket portion.

[0073] The gear fixing member may be provided with a second normal limit structure. The second normal limit structure is configured to cooperate with the first normal limit structure to limit the normal motion path of the driving element. The second normal limit structure may be a dovetail tenon. In some embodiments, the second normal limit structure is disposed on the cover plate body. In other embodiments, one end of the second normal limit structure is connected to the top of the bracket portion and extends downwardly from the end along the cover plate body.

[0074] Counting gear and linkage gear

[0075] The counting gear is arranged in the cavity. The counting gear can be sleeved on the first fixed shaft. A limiting groove is arranged on the surface of the counting gear. The limiting groove cooperates with the limiting protrusion on the gear fixing member (which can be located on the non-return pawl) to prevent the counting gear from rotating in the reverse direction of the counting direction. The limiting groove is arranged on the surface of the counting gear close to the cover plate body. The limiting groove and the meshing teeth are arranged on the same surface. When the counting gear is a plurality of gears, the limiting groove is arranged on the counting gear of the lowest counting position (for example, the unit position gear).

[0076] The numbers displayed on the counting gear correspond to a meshing tooth. The driving element can mesh with the meshing tooth of the counting gear at the lowest counting position, thereby driving the counting gear to count. There are multiple limit grooves. Each meshing tooth corresponds to a limit groove.

[0077] The counting gears can be provided in plurality. Two adjacent counting gears are linked by a linkage gear. The linkage gear is provided between the two counting gears it is linked with. The counting gear with the lowest counting position is close to the cover plate body, and the counting gear with the highest counting position is close to the bracket body. The counting positions of the gears from the cover plate body to the bracket body increase in sequence. The linkage gear can be sleeved on the second fixed shaft.

[0078] The side of the counting gear at the lowest counting position close to the linkage gear is provided with transmission teeth, and the side close to the cover plate body is provided with meshing teeth; the two sides of the other counting gears with low counting positions are provided with transmission teeth and meshing teeth respectively; the side of the counting gear at the highest counting position close to the linkage gear is provided with meshing teeth. The transmission teeth can be two half teeth. The linkage gear meshes with the meshing teeth of the counting gear with the higher counting position among the two adjacent counting gears; when the counting gear with the lower counting position counts to 0, when the counting gear with the lower counting position counts again, the transmission teeth of the counting gear with the lower counting position drive the linkage gear to rotate, and the linkage gear drives the counting gear with the higher counting position to rotate, and the counting gear with the higher counting position counts once.

[0079] The counting gear is provided with a stopper. The stopper is provided on the surface of the counting gear close to the bracket body. When there are multiple counting gears, the stopper is provided on the counting gear with the highest counting position. The stopper can be a convex structure. When the counting gear counts to 0, the stopper abuts against the bracket stopper, thereby limiting the counting gear from continuing to rotate in the counting direction.

[0080] According to an embodiment of the present invention, the counting gear comprises a ones gear, a tens gear and a hundreds gear. The linkage gear comprises a first linkage gear and a second linkage gear.

[0081] The ones gear, tens gear and hundreds gear are arranged on the first fixed shaft in sequence. The ones gear is arranged close to the cover plate body. The hundreds gear is arranged close to the bracket body. The tens gear is arranged between the ones gear and the hundreds gear.

[0082] The first linkage gear and the second linkage gear are arranged on the second fixed shaft. The first linkage gear is arranged between the ones gear and the tens gear, and the first linkage gear is arranged to link the ones gear and the tens gear. The second linkage gear is arranged between the tens gear and the hundreds gear, and the second linkage gear is arranged to link the tens gear and the hundreds gear.

[0083] The surface of the units gear close to the cover plate body is provided with units meshing teeth and limiting grooves. The surface of the units gear close to the tens gear is provided with units transmission teeth.

[0084] Tens of meshing teeth are arranged on the surface of the tens gear close to the ones gear, and ten of transmission teeth are arranged on the surface of the tens gear close to the hundreds gear.

[0085] The surface of the hundreds gear close to the tens gear is provided with hundreds meshing teeth. The surface of the hundreds gear close to the bracket body is provided with a stopper.

[0086] Drive elements and elastic components

[0087] The driving element is configured to move under the action of an external force, thereby driving the counting gear to rotate. The driving element includes a main body and a driving pawl.

[0088] The main body is provided with a pressing part which is configured to receive an external force to move the main body.

[0089] The main body is provided with a first normal limit structure. The first normal limit structure is arranged to cooperate with the second normal limit structure to limit the normal motion path of the driving element. The first normal limit structure can be a dovetail-shaped mortise and tenon groove. The first normal limit structure can be arranged on the side wall of the main body close to the cover body.

[0090] The main body is provided with a first transverse limiting structure. The first transverse limiting structure is arranged to cooperate with the second transverse limiting structure to limit the transverse movement path of the driving element. The first transverse limiting structure can be a dovetail tenon. The first transverse limiting structure can be arranged on the side wall of the main body near the counting gear.

[0091] The driving pawl is connected to the main body. The driving pawl is configured to drive the counting gear (the lowest counting position counting gear) to rotate through the meshing teeth. The main body moves downward under external pressure, driving the driving pawl to move downward, the driving pawl meshes with the meshing teeth, and the counting gear is driven to rotate in the counting direction. The driving pawl meshes with the meshing teeth of the lowest counting position counting gear (the units gear), and drives the lowest counting position counting gear (the units gear) to rotate in the counting direction. In some embodiments, one end of the driving pawl is connected to the lower surface of the main body, and the other end of the driving pawl is a free end, and the free end can mesh with the meshing teeth of the counting gear.

[0092] The driving pawl is provided with a deflection bending portion. The deflection bending portion is arranged so that when the counting gear rotates normally, the deflection bending portion does not affect the driving pawl driving the counting gear to rotate, and when the counting gear is locked and an external force acts on the pressing portion, the deflection bending portion generates elastic deformation, so that the driving element moves. The deflection bending portion can be arranged in the middle of the driving pawl. The deflection bending portion can be realized by designing the material and the bending structure.

[0093] The elastic component is configured to restore the driving element to an initial position when the external force is eliminated. The driving element is also provided with a connecting portion.

[0094] One end of the connecting portion is connected to the main body. Specifically, it is connected to the lower surface of the main body. The other end of the connecting portion is a free end. A portion of the connecting portion is located in the through hole of the fixing portion of the gear fixing member. The free end of the connecting portion may be provided with a longitudinal limiting structure. The longitudinal limiting structure limits the longitudinal displacement of the driving element. The longitudinal limiting structure may be a cotter pin. The projection of the connecting portion on the plane where the lower surface of the main body is located falls within the range of the lower surface of the main body.

[0095] The elastic component is sleeved on the outer periphery of the connecting part. One end of the elastic component abuts against the main body, and the other end of the elastic component abuts against the fixing part. The elastic component can be a spring.

[0096] <Metered-dose inhalation device>

[0097] The metered dose inhalation device of the utility model comprises an aerosol can and an aerosol actuator. The aerosol actuator is as described above and will not be described in detail here.

[0098] At least a part of the aerosol can is contained in the shell body. The liquid outlet pipe of the aerosol can is arranged in the liquid inlet channel. The edge of the aerosol can cover body contacts with the pressing part of the driving element.

[0099] Example 1

[0100] like Figure 1 As shown, the aerosol actuating device of the present invention comprises a housing 4 , a counting unit 5 and a dust cover 6 .

[0101] like Figure 2 As shown, the housing 4 includes a housing body 410 and a nozzle 420. The housing body 410 and the nozzle 420 are connected. The housing body 410 and the nozzle 420 can be generally arranged in an "L" shape. The housing body 410 is used to accommodate the aerosol can and the counting unit 5. A liquid inlet channel 411 is provided in the housing body 410. The liquid inlet channel 411 is used to be connected to the liquid outlet pipe of the aerosol can. A spray hole 412 is provided on the liquid inlet channel 411. The liquid inlet channel 411 is connected to the nozzle 420 through the spray hole.

[0102] like Figure 1 As shown, the dust cover 6 is sleeved on the nozzle 420. The shell body 410 has a rear wall 413, and the rear wall 413 is arranged at a position away from the nozzle 420. Part of the rear wall 413 is a detachable structure. This makes it easy to assemble the counting unit 5 into the shell body 410. The detachable structure can be assembled with other parts of the rear wall 413 by snapping. An observation window 414 is arranged on the rear wall 413, and the observation window 414 is used to display the number of usable times of the remaining medicine in the aerosol can. The observation window 414 can be arranged on the detachable part of the rear wall 413.

[0103] like Figure 3 and Figure 4 As shown, the counting unit 5 includes a gear fixing member, a counting gear, a linkage gear, a driving element 2 and an elastic component 3.

[0104] The gear fixing member has a cover plate portion 110 and a bracket portion 120. The cover plate portion 110 includes a cover plate portion body 117. The bracket portion 120 has a bracket portion body 133 and a top portion 134. The cover plate portion body 117 and the bracket portion body 133 are arranged opposite to each other. A portion of the cover plate portion body 117, a portion of the bracket portion body 133 and a portion of the top portion 134 of the bracket portion form a cavity. The cavity is used to accommodate a counting gear and a linkage gear. The cavity has a display window 140, and the display window 140 is used to display the numbers on the counting gear.

[0105] like Figure 4As shown, a first fixed shaft 171 and a second fixed shaft 172 are provided in the cavity. The first fixed shaft 171 is located higher than the second fixed shaft 172. One end of the first fixed shaft 171 is fixed to the bracket body 133, and the other end of the first fixed shaft 171 can be fixed to the cover part 110 through a connecting component. One end of the second fixed shaft 172 is fixed to the bracket body 133, and the other end of the second fixed shaft 172 can be fixed to the cover part 110 through a connecting component.

[0106] In some embodiments, the bracket body 133 and the top 134 are an integrated structure, and the cover body 117 is assembled with the top 134 through a connector, for example, by snapping together with the top 134. Figure 5 As shown, the cover plate portion 110 further includes a first connecting sleeve 111 and a second connecting sleeve 112. The first connecting sleeve 111 and the second connecting sleeve 112 are arranged on the inner surface of the cover plate portion body 117. The other end of the first fixed shaft 171 extends into the first connecting sleeve 111, so that the first fixed shaft 171 is assembled with the cover plate portion 110. The other end of the second fixed shaft 172 extends into the second connecting sleeve 112, so that the second fixed shaft 172 is assembled with the cover plate portion 110. In this way, the counting gear and the linkage gear are respectively sleeved on the first fixed shaft 171 and the second fixed shaft 172.

[0107] like Figure 3 and Figure 4 As shown, the counting gear includes a units gear 151, a tens gear 152 and a hundreds gear 153. The units gear 151, the tens gear 152 and the hundreds gear 153 are all sleeved on the first fixed shaft 171. The units gear 151 is close to the cover plate body 117, the tens gear 152 is arranged between the units gear 151 and the hundreds gear 153, and the hundreds gear 153 is close to the bracket body 133. A limit block 131 can be arranged on the top 134 of the bracket. The limit block 131 is used to limit the position of the counting gear.

[0108] The linkage gear includes a first linkage gear 161 and a second linkage gear 162. The first linkage gear 161 and the second linkage gear 162 are sleeved on the second fixed shaft 172. The first linkage gear 161 is arranged between the units gear 151 and the tens gear 152, and is used to link the units gear 151 and the tens gear 152. The second linkage gear 162 is arranged between the tens gear 152 and the hundreds gear 153, and is used to link the tens gear 152 and the hundreds gear 153.

[0109] like Figure 6As shown, the units gear 151 is provided with units gear meshing teeth 1511 on its surface close to the cover plate body 117. There are multiple units gear meshing teeth 1511, and the numbers displayed on the units gear 151 correspond to one units gear meshing tooth 1511. The driving element 2 drives the units gear 151 to rotate through the units gear meshing teeth 1511. Each rotation of the units gear 151 completes a cumulative count.

[0110] like Figure 4 As shown, a tens gear meshing tooth (not shown) is provided on the side of the tens gear 152 close to the ones gear 151. There are multiple tens gear meshing teeth, and the numbers displayed on the tens gear 152 correspond to a tens gear meshing tooth. The tens gear meshing tooth meshes with the first linkage gear 161.

[0111] The ones gear 151 is provided with a ones wheel transmission tooth 1513 on its surface away from the cover body 117. When the ones gear 151 counts down to 0, when counting again, the ones wheel transmission tooth 1513 drives the first linkage gear 161 to rotate, and the first linkage gear 161 drives the tens gear 152 to rotate, and the tens gear 152 counts once.

[0112] The surface of the hundreds gear 153 near the tens gear 152 is provided with hundreds gear meshing teeth (not shown). There are multiple hundreds gear meshing teeth, and the numbers displayed on the hundreds gear 153 correspond to one hundreds gear meshing tooth. The hundreds gear meshing teeth mesh with the second linkage wheel 162.

[0113] Tens gear 152 is provided with tens gear transmission teeth 1521 on its surface near hundreds gear 153. When tens gear 152 counts down to 0, and tens gear 152 rotates to count again, tens gear transmission teeth 1521 drives second linkage gear 162 to rotate, and second linkage gear 162 drives hundreds gear 153 to rotate, and hundreds gear 153 counts once.

[0114] A stopper 1531 is provided on the surface of the hundreds gear 153 close to the bracket body 133. The stopper 1531 may be a convex structure. The bracket stopper (not shown) is provided on the inner surface of the bracket body 133. The bracket stopper may be a boss. When the hundreds gear 153 counts to 0, the stopper 1531 and the bracket stopper abut against each other, thereby limiting the hundreds gear 153 from continuing to rotate in the counting direction. When the units gear 151 and the tens gear 152 also count to 0, two adjacent gears among the units gear 151, the first linkage gear 161, the tens gear 152, the second linkage gear 162, and the hundreds gear 153 are meshed, and since the hundreds gear 153 cannot continue to rotate in the counting direction, the units gear 151 and the tens gear 152 cannot continue to rotate in the counting direction, thereby locking the counting gear. This prevents over-counting and improves the accuracy of counting.

[0115] like Figure 5 As shown, the cover portion 110 also includes a check pawl 113. One end of the check pawl 113 is connected to the cover portion body 117, and the other end of the check pawl 113 is a free end. The free end of the check pawl 113 meshes with the units gear meshing teeth 1511, thereby preventing the units gear 151 from rotating in the reverse direction of the counting direction. A limiting protrusion 114 is provided on the surface of the free end of the check pawl 113 close to the units gear 151. The limiting protrusion 114 can be a cylinder, or can be formed by stacking a plurality of cylinders. When the limiting protrusion 114 is formed by stacking a plurality of cylinders, the plurality of cylinders are stacked in descending order of diameter, and the diameter of the cylinder close to the check pawl 113 is the largest.

[0116] like Figure 6 As shown, a limiting groove 1512 matching with the limiting protrusion 114 is provided on the surface of the units gear 151 close to the cover body 117. A plurality of limiting grooves 1512 are provided. Each units gear meshing tooth 1511 corresponds to a limiting groove 1512. The limiting protrusion 114 matches with the limiting groove 1512 to prevent the units gear 151 from rotating in the reverse direction along the counting direction. The limiting protrusion 114, the limiting groove 1512 and the non-return pawl 113 play a double non-return role, preventing the units gear 151 from rotating in the opposite direction of the counting direction when the driving element 2 is reset; at the same time, the limiting groove 1512 and the limiting protrusion 114 also have a positioning function, preventing the counting gear from rotating due to accidental contact, thereby improving the counting accuracy.

[0117] like Figure 7 As shown, the driving element 2 includes a main body portion 210 , a driving pawl 220 and a connecting portion 230 .

[0118] The upper surface of the main body 210 is provided with a pressing portion 211. External force acts on the pressing portion 211 to move the main body 210. A first normal limiting structure 212 is provided on the side wall of the main body 210 close to the cover body 117. The first normal limiting structure 212 can be a dovetail groove. Figure 4 As shown, the second normal limiting structure 115 can be arranged on the inner surface of the cover body 117; or one end of the second normal limiting structure 115 can be connected to the top 134 of the bracket part and extend downward along the cover body 117 from the end. The second normal limiting structure 115 can be a dovetail tenon. The first normal limiting structure 212 cooperates with the second normal limiting structure 115 to limit the normal motion path of the driving element 2.

[0119] like Figure 4 and 7 As shown, a first transverse limiting structure 213 is provided on the side wall of the main body 210 near the counting gear. The first transverse limiting structure 213 can be a dovetail tenon. A second transverse limiting structure 132 is provided on the top 134 of the bracket part. The second transverse limiting structure 132 can be a dovetail tenon groove. The first transverse limiting structure 213 and the second transverse limiting structure 132 cooperate to limit the transverse movement path of the driving element 2.

[0120] One end of the driving pawl 220 is connected to the lower surface of the main body 210, and the other end of the driving pawl 220 is a free end. The free end of the driving pawl 220 can mesh with the meshing teeth 1511 of the units gear, thereby driving the units gear 151 to rotate in the counting direction. The driving pawl 220 is provided with a deflection bending portion 221. The deflection bending portion 221 can be arranged in the middle of the driving pawl 220. When the counting gear rotates normally, the deflection bending portion 221 does not affect the driving pawl 220 driving the counting gear to rotate; when the counting gear is locked (in this embodiment, the units gear 151, the tens gear 152 and the hundreds gear 153 are all counted to 0) and an external force acts on the pressing portion 211, the deflection bending portion produces elastic deformation, so that the driving element 2 moves. In this way, the driving element 2 will not restrict the movement of the aerosol can relative to the aerosol can valve stem. When the count reaches 0, the aerosol can can still move relative to the aerosol can valve stem to a position where the aerosol can is opened, so that the remaining medicine in the aerosol can is sprayed out, so that the medicine can be fully used. The deflection bending portion 221 can be realized by designing the material and the bending structure.

[0121] like Figure 7 As shown, one end of the connecting portion 230 is connected to the lower surface of the main body 210, and the other end of the connecting portion 230 is a free end. The projection of the connecting portion 230 on the plane where the lower surface of the main body 210 is located falls within the range of the lower surface of the main body 210.

[0122] like Figure 5As shown, the cover portion 110 also includes a fixing portion 116. The fixing portion 116 is arranged on the inner surface of the cover portion body 110. The fixing portion 116 is provided with a through hole. A portion of the connecting portion 230 is passed through the through hole. The free end of the connecting portion 230 passes through the through hole. The free end of the connecting portion 230 is provided with a longitudinal limiting structure 231. The longitudinal limiting structure 231 can be a cotter pin. The longitudinal limiting structure 231 limits the longitudinal displacement of the driving element 2.

[0123] The elastic component 3 is sleeved on the outer periphery of the connecting portion 230. One end of the elastic component 3 abuts against the lower surface of the main body 210, and the other end of the elastic component 3 abuts against the fixing portion 116. The elastic component 3 is used to restore the driving element 2 to the initial position when the external force is eliminated. The elastic component 3 can be a spring.

[0124] When external force acts on the pressing portion 211, the driving element 2 moves downward, the elastic component 3 contracts, the driving pawl 220 engages with the units gear meshing teeth 1511, and drives the units gear 151 to rotate in the counting direction, completing one count. When the external force acting on the pressing portion 211 is eliminated, the elastic component 3 returns to the initial state, and the driving element 2 returns to the initial position.

[0125] like Figure 8 As shown, the upper and lower parts of the surface of the cover body 117 away from the rear wall 413 are respectively provided with a first positioning column 181 and a second positioning column 182, and the middle part of the surface is provided with a first buckle 191. The upper and lower parts of the surface of the bracket body 133 away from the rear wall 413 are respectively provided with a third positioning column 183 and a fourth positioning column 184, and the middle part of the surface is provided with a second buckle 192.

[0126] The shell body 410 is provided with a first positioning hole cooperating with the first positioning column 181, a second positioning hole cooperating with the second positioning column 182, a third positioning hole cooperating with the third positioning column 183, a fourth positioning hole cooperating with the fourth positioning column 184, a first card slot cooperating with the first clip 191, and a second card slot cooperating with the second clip 192.

[0127] The gear fixing part is assembled with the housing 4 by means of the connection of the positioning column, the positioning hole, the buckle and the slot, so that the accuracy of the assembly can be ensured.

[0128] Example 2

[0129] like Fig. 9 As shown, the metered dose inhalation device of the present invention comprises an aerosol can 7 and the aerosol actuator of Example 1.

[0130] like Fig.10As shown, at least a portion of the aerosol can is assembled in the housing body 410. The liquid outlet pipe 710 of the aerosol can is assembled in the liquid inlet channel 411. The edge of the cover of the aerosol can contacts the pressing portion 211 of the driving element 2.

[0131] The present invention is not limited to the above-mentioned embodiments. Without departing from the essential content of the present invention, any deformation, improvement, and substitution that can be thought of by those skilled in the art shall fall within the scope of the present invention.

Claims

1. An aerosol actuator, characterized in that: The aerosol actuator comprises a housing and a counting unit; The housing comprises a housing body and a nozzle, wherein the housing body is arranged to be in communication with the nozzle; and the housing body is arranged to accommodate the counting unit; The counting unit is arranged in the housing body, and the counting unit comprises a gear fixing member, a counting gear, a driving element and an elastic member; The interior of the gear fixing member forms a cavity; The gear fixing member includes a cover plate portion, and the cover plate portion includes a cover plate portion body and a non-return pawl; The counting gear is arranged in the cavity, and a limiting groove is arranged on the surface of the counting gear close to the cover plate body; The non-return pawl is arranged on the cover plate body, and the non-return pawl is arranged to cooperate with the meshing teeth of the counting gear, so as to limit the rotation direction of the counting gear; a limiting protrusion is arranged on the non-return pawl, and the limiting protrusion is arranged to cooperate with the limiting groove, so as to limit the rotation direction of the counting gear; The driving element is configured to move under the action of an external force, thereby driving the counting gear to rotate; The elastic component is configured to restore the driving element to an initial position when the external force is eliminated.

2. The aerosol actuator according to claim 1, characterized in that: The numbers displayed on the counting gear correspond to a meshing tooth respectively; and each meshing tooth corresponds to a limiting groove respectively.

3. The aerosol actuator according to claim 1, characterized in that: The counting unit comprises a linkage gear; the counting gear comprises at least two; two adjacent counting gears are linked by the linkage gear; The gear fixing member further comprises a bracket portion matched with the cover plate portion; the bracket portion comprises a bracket portion body and a bracket portion stopper; The counting gear comprises a lowest counting position counting gear and a highest counting position counting gear; the lowest counting position counting gear is close to the cover plate body, and the highest counting position counting gear is close to the bracket body; The counting gear of the lowest counting position is provided with a limiting groove; the non-return pawl is provided to cooperate with the meshing teeth of the counting gear of the lowest counting position, so as to limit the rotation direction of the counting gear of the lowest counting position; The bracket part stopper is arranged on the bracket part body; A stopper is provided on the surface of the highest counting position counting gear close to the bracket body; the stopper cooperates with the bracket stopper so that when the highest counting position counting gear counts to 0, the highest counting position counting gear is restricted from rotating in the counting direction.

4. The aerosol actuator according to claim 3, characterized in that: The linkage gear is arranged between two adjacent counting gears; the counting gear of the lowest counting position is provided with a transmission tooth on one side close to the linkage gear, and a meshing tooth on one side close to the cover plate body; the counting gears of other lower counting positions are provided with transmission teeth and meshing teeth on both sides respectively; the counting gear of the highest counting position is provided with meshing teeth on one side close to the linkage gear; The linkage gear is configured to be able to mesh with the meshing teeth of the counting gear with a higher counting position among the two adjacent counting gears; the linkage gear and the counting gear are configured to have the following functions: when the counting gear with a lower counting position counts to 0, when the counting gear with a lower counting position counts again, the transmission teeth of the counting gear with a lower counting position drive the linkage gear to rotate, and the linkage gear drives the counting gear with a higher counting position to rotate, and the counting gear with a higher counting position counts once.

5. The aerosol actuator according to claim 3, characterized in that: The gear fixing member includes a first fixed shaft and a second fixed shaft; the first fixed shaft and the second fixed shaft are arranged in the cavity, and the first fixed shaft is higher than the second fixed shaft; the first fixed shaft is used to fix the counting gear, and the second fixed shaft is used to fix the linkage gear.

6. The aerosol actuator according to claim 1, characterized in that: The driving element comprises a main body and a driving pawl; The main body is provided with a pressing part; the pressing part is configured to receive an external force to move the main body; The driving pawl is connected to the main body, and the driving pawl is configured to drive the counting gear to rotate through the meshing teeth; The driving pawl is provided with a deflection bending portion; the deflection bending portion is arranged so that when the counting gear rotates normally, the deflection bending portion does not affect the driving pawl driving the counting gear to rotate, and when the counting gear is locked and an external force acts on the pressing portion, the deflection bending portion produces elastic deformation, so that the driving element moves.

7. The aerosol actuator according to claim 6, characterized in that: The driving element further comprises a connecting portion, and the gear fixing member is provided with a fixing portion; The elastic component is sleeved on the connecting portion, one end of the elastic component is in contact with the main body, and the other end of the elastic component is in contact with the fixing portion; The fixing portion is provided with a through hole, and at least a portion of the connecting portion passes through the through hole.

8. The aerosol actuator according to claim 7, characterized in that: The main body is provided with a first normal limiting structure and a first lateral limiting structure, and the gear fixing member is provided with a second normal limiting structure and a second lateral limiting structure; The first normal limiting structure cooperates with the second normal limiting structure to limit the normal movement path of the driving element; the first lateral limiting structure cooperates with the second lateral limiting structure to limit the lateral movement path of the driving element; A longitudinal limiting structure is arranged at the lower part of the connecting part, which is arranged to limit the longitudinal displacement of the driving element.

9. The aerosol actuator according to claim 1, characterized in that: The aerosol actuator further comprises a dust cover; The shell body is provided with a liquid inlet channel, and the liquid inlet channel has a spray hole; the liquid inlet channel is arranged to be connected with the nozzle through the spray hole; The dustproof cover is sleeved on the nozzle.

10. A metered dose inhalation device, characterized in that: It comprises an aerosol can and the aerosol actuator according to claim 9; At least a portion of the aerosol can is configured to be accommodated in the shell body, and the liquid inlet channel is configured to be connected to the liquid outlet pipe of the aerosol can.

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