Rotary stroke compensation mechanism and dosing distributor

Abstract

The invention provides a rotation stroke compensation mechanism and a dosing distributor, and the rotation stroke compensation mechanism comprises a driving rotating part which is used for being connected with a driving assembly and rotating under the action of the driving assembly; the driven rotating part is rotationally connected with the driving rotating part and is used for winding an object to be wound; the damping assembly is arranged between the driving rotating piece and the driven rotating piece and used for generating torque between the driving rotating piece and the driven rotating piece, so that the driving rotating piece applies driving torque to the driven rotating piece through the damping assembly; wherein the driving torque is not greater than a preset threshold value; the preset threshold value is the driving torque generated when the driving rotating piece and the driven rotating piece generate relative rotation. The rotation stroke compensation mechanism can play a role in stroke compensation, and no fool-proof design is needed.

Description

Technical Field

[0001] This invention relates to the field of drug delivery device technology, and in particular to a rotary stroke compensation mechanism and a drug delivery dispenser. Background Technology

[0002] In powder inhaler delivery systems, the powdered or tablet form of the medication is loaded onto a thin paper strip, which, once opened, delivers the medication to the patient. The strip, once opened, consists of a paper strip and a blister pack. The paper strip is then wound around a winding reel, involving a stroke compensation mechanism.

[0003] Currently, the stroke compensation mechanism of the paper tape in common powder inhaler systems usually adopts the method of elastic blade wheel or torsion spring compensation wheel. However, these two mechanisms have some drawbacks. For example, in powder inhaler systems with dual drug delivery tapes, since the two paper tapes rotate in opposite directions, they cannot share the same stroke compensation mechanism. Therefore, the device needs to be designed to prevent mistakes. Summary of the Invention

[0004] The rotary stroke compensation mechanism and drug dispensing device provided in this application mainly solve the technical problem that in a powder aerosol drug delivery system with two drug tapes, since the two paper tapes rotate in opposite directions, they cannot share the same stroke compensation mechanism. Therefore, the device needs to be designed to prevent mistakes.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a rotary stroke compensation mechanism, including an active rotating component for connecting to a drive assembly and rotating under the action of the drive assembly; The driven rotating component is rotatably connected to the driving rotating component and is used to wind the object to be wound. A damping assembly is disposed between the active rotating member and the driven rotating member, and is used to generate torque between the active rotating member and the driven rotating member, so that the active rotating member applies driving torque to the driven rotating member through the damping assembly; Wherein, the driving torque is not greater than a preset threshold; the preset threshold is the driving torque when the active rotating component and the driven rotating component rotate relative to each other.

[0006] In one embodiment, the driving torque applied to the driven rotating member by clockwise and counterclockwise rotation is the same.

[0007] In one embodiment, the damping assembly does not include an elastic damping element made of a rigid material.

[0008] In one embodiment, the damping component includes one or more of an elastic material damping element, a viscous grease damping element, and a magnetic damping element.

[0009] In one embodiment, one of the active rotating member and the driven rotating member has a shaft, and the other has an opening into which the shaft is inserted.

[0010] In one embodiment, the active rotating member includes the rotating shaft and the substrate; the rotating shaft is vertically connected to one side surface of the substrate; the driven rotating member includes a hollow columnar body with the opening and is sleeved on the rotating shaft; the damping component is disposed between the end faces of the substrate and the hollow columnar body, and / or, disposed between the outer surface of the rotating shaft and the inner surface of the hollow columnar body.

[0011] In one embodiment, the damping assembly includes a first elastic material damping element disposed between the substrate and the end face of the hollow column; and / or disposed between the outer surface of the rotating shaft and the inner surface of the hollow column; and the first elastic material damping element is in a closed-loop shape.

[0012] In one embodiment, the damping assembly further includes at least one second elastic material damping element spaced apart; the at least one second elastic material damping element is disposed between the end face of the substrate and the hollow column, and is located on the side of the first elastic material damping element near the rotating shaft; and / or, the at least one second elastic material damping element is disposed between the outer surface of the rotating shaft and the inner surface of the hollow column, and is located on the side of the first elastic material damping element near the substrate.

[0013] In one embodiment, the at least one second elastic material damping element is in a closed-loop shape, and the first elastic material damping element and the at least one second elastic material damping element are coaxially sleeved. Alternatively, the at least one second elastic material damping element is sheet-shaped and is spaced apart along the circumferential direction of the axis of rotation to form at least one ring, and the first elastic material damping element and at least one ring are coaxially sleeved together.

[0014] In one embodiment, the torque generated by the first elastic material damping member between the active rotating member and the driven rotating member is less than the torque generated by the at least one second elastic material damping member between the active rotating member and the driven rotating member.

[0015] In one embodiment, there are multiple second elastic material damping elements, and the torque generated by the multiple second elastic material damping elements between the active rotating element and the driven rotating element gradually increases in the direction close to the rotating shaft.

[0016] In one embodiment, the damping assembly includes an elastic material damping element, the active rotating element has a first locking groove on its side surface facing the driven rotating element, and / or the driven rotating element has a second locking groove on its side surface facing the active rotating element. The elastic damping element is partially elastically compressed within the first snap-fit ​​groove and abuts against the bottom wall of the first snap-fit ​​groove; and / or the elastic damping element is partially elastically compressed within the second snap-fit ​​groove and abuts against the bottom wall of the second snap-fit ​​groove; the driven rotating element and the surface of the driving rotating element are in contact.

[0017] In one embodiment, the damping assembly includes the viscous grease damping element; the viscous grease damping element includes an annular viscous grease damping element disposed between the end faces of the substrate and the hollow columnar body, and / or the viscous grease damping element includes a hollow columnar viscous grease damping element disposed between the outer surface of the rotating shaft and the inner surface of the hollow columnar body.

[0018] In one embodiment, it further includes: a first sealing member and a second sealing member, sandwiched between the active rotating member and the driven rotating member; The viscous grease damping element includes an annular viscous grease damping element disposed between the end faces of the substrate and the hollow columnar body, wherein the first sealing element and the second sealing element are respectively disposed on the outer and inner sides of the annular viscous grease damping element; and / or The viscous grease damping component includes a hollow cylindrical viscous grease damping component disposed between the outer surface of the rotating shaft and the inner surface of the hollow cylindrical body, and the first sealing component and the second sealing component are respectively disposed at opposite ends of the hollow cylindrical viscous grease damping component.

[0019] In one embodiment, the damping assembly includes a magnetic damping assembly; the magnetic damping assembly includes: a first magnetic element and a second magnetic element disposed opposite to each other; one of the first magnetic element and the second magnetic element is disposed on the side of the driven rotating member facing the driving rotating member, and the other is disposed on the side of the driving rotating member facing the driven rotating member, the first magnetic element and the second magnetic element attract each other magnetically to generate torque between the first magnetic element and the second magnetic element.

[0020] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a drug dispensing device, including a rotational stroke compensation mechanism, which is the rotational stroke compensation mechanism mentioned above; A drive component, connected to the active rotating component, is used to drive the active rotating component to rotate.

[0021] This application provides a rotational stroke compensation mechanism and a drug delivery dispenser. The mechanism includes an active rotating component connected to a driving assembly and rotating under the action of the driving assembly; a driven rotating component connected to the active rotating component for winding the object to be wound; and a damping assembly between the active and driven rotating components, allowing the active rotating component to apply a driving torque to the driven rotating component. The driving torque is not greater than a preset threshold, which is the driving torque required for relative rotation between the active and driven rotating components. Thus, when the driving torque is less than the preset threshold, the driven rotating component can rotate with the active rotating component to wind the object; when the driving torque equals the preset threshold, the driven rotating component can rotate relative to the active rotating component to compensate for the stroke. Furthermore, the active rotating component can rotate clockwise or counterclockwise to meet different rotation direction requirements, eliminating the need for error-proofing design. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of a rotary stroke compensation mechanism provided in an embodiment of this application; Figure 2 for Figure 1 A disassembly diagram of the structure shown; Figure 3 for Figure 2 Vertical sectional view of the corresponding rotary stroke compensation mechanism; Figure 4 This is a schematic diagram of the structure of the damping component and the substrate provided in one embodiment of this application; Figure 5 This is a schematic diagram of the structure of the damping component and the substrate provided in another embodiment of this application; Figure 6 This is a schematic diagram of the structure of the damping component and the substrate provided in another embodiment of this application; Figure 7 A disassembled vertical sectional view of the active and driven rotating parts; Figure 8 A schematic diagram of a structure in which an elastic material damping element is disposed between the outer surface of the rotating shaft and the inner surface of the hollow cylindrical body; Figure 9 for Figure 1 Another disassembly diagram of the structure shown; Figure 10 for Figure 9 Vertical sectional view of the corresponding rotary stroke compensation mechanism; Figure 11 for Figure 1 Another vertical sectional view of the structure shown; Figure 12 for Figure 11 A top view of the medium-viscosity grease damping component, the first seal, and the second seal on the substrate; Figure 13 for Figure 1 Another disassembly diagram of the structure shown; Figure 14 for Figure 13 Vertical sectional view of the corresponding rotary stroke compensation mechanism; Figure 15 This is a schematic diagram of the internal structure of a drug dispensing device provided in an embodiment of this application.

[0024] Explanation of icon numbers: 10-Rotational stroke compensation mechanism; 1-Active rotating component; 11-Base plate; 12-Rotating shaft; 121-Upper end; 2-Driven rotating component; 20-Hollow columnar body; 21-Opening; 22-Hook part; 23-Inner surface; 24-Outer surface; 25-Flange; 31-Elastic material damping component; 311-First elastic material damping component; 312-Second elastic material damping component; 313-Third elastic material damping component; 314-Fourth elastic material damping component; 32-Viscous grease damping component; 33-Magnetic damping assembly; 331-First magnetic component; 332-Second magnetic component; A-First snap-fit ​​groove; B-Second snap-fit ​​groove; a-First sealing component; b-Second sealing component. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] This application utilizes a rotary stroke compensation mechanism 10 capable of generating torque to achieve stroke compensation. The torque can be generated by the frictional force generated after the elastic material is compressed, the viscosity of the viscous grease, and the magnetic adsorption force of the magnetic material. In powder aerosols with dual-band packaging, the rotary stroke compensation mechanism 10 of this application is universal and does not require a foolproof design.

[0029] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the overall structure of a rotary stroke compensation mechanism provided in an embodiment of this application; Figure 2 for Figure 1 A disassembly diagram of the structure shown; Figure 3 for Figure 2The vertical sectional view of the corresponding rotational stroke compensation mechanism. In this embodiment, a rotational stroke compensation mechanism 10 is provided, which can be used universally in drug delivery systems with dual drug delivery belts without requiring additional foolproof design. The rotational stroke compensation mechanism 10 includes an active rotating component 1, a driven rotating component 2, and a damping assembly 3.

[0031] The active rotating component 1 is connected to the driving assembly and rotates under the driving action of the driving assembly; the driven rotating component 2 is rotatably connected to the active rotating component 1 and is used to wind the object to be wound. The active rotating component 1 can be a rotating gear. The object to be wound can be paper tape, blister pack, substrate, or cover sheet as described in the following embodiments.

[0032] Specifically, the active rotating component 1 can rotate clockwise or counterclockwise under the drive of the drive assembly. The driving torque applied to the driven rotating component 2 by the active rotating component 1 during clockwise and counterclockwise rotation can be the same, ensuring that the force driving the driven rotating component 2 to rotate clockwise or counterclockwise is the same. Thus, the rotational stroke compensation mechanism 10 can be applied to positions requiring clockwise rotation or counterclockwise rotation. For example, in a drug delivery system with two drug delivery belts, the rotation directions of the stroke compensation mechanisms corresponding to the two belts are required to be opposite. The rotational stroke compensation mechanism 10 provided in this application can be universally used in this drug delivery system, eliminating the need for a separate rotational compensation mechanism rotating in the opposite direction, thus demonstrating strong versatility.

[0033] Specifically, the aforementioned drug strip is a drug carrier, generally a long, slender, peelable strip. Those skilled in the art will understand that the drug strip has multiple pouches for containing the drug, wherein the pouches are evenly spaced along their length and confined between two peelable sheets tightly fastened together. After being peeled open, the drug strip consists of a paper strip and a blister pack, wherein the paper strip is the material to be wrapped mentioned in all embodiments of this application; of course, the material to be wrapped in this application can also be a blister pack, or the substrate and cover sheet mentioned below. The drug can be a capsule, pill, tablet, or powder. Preferably, the drug includes a powdered drug.

[0034] In some embodiments, at least one of the active rotating member 1 and the driven rotating member 2 has a rotating shaft 12, and the other has an opening 21. The upper end 121 of the rotating shaft 12 is inserted into the opening 21 to connect the active rotating member 1 and the driven rotating member 2. Specifically, the active rotating member 1 may include a rotating shaft 12 and a substrate 11. The substrate 11 is plate-shaped, such as a disk; and the outer circumferential edge of the substrate 11 has serrations to engage with a drive assembly, thereby driving the substrate 11 to rotate via a drive member in the drive assembly. The drive member may be a motor, a pump, or manually actuated. The rotating shaft 12 is vertically connected to one side surface of the substrate 11, and the rotating shaft 12 and the substrate 11 form an integral active rotating member 1. The rotating shaft 12 extends from the substrate 11 and is vertically connected to one side surface of the substrate 11. It should be noted that the embodiments mentioned in this application are mainly described with the active rotating member 1 having a rotating shaft 12 and the driven rotating member 2 having an opening 21.

[0035] Combination Figure 1 , Figure 2 and Figure 3 In this embodiment, the active rotating member 1 has a rotating shaft 12, and the driven rotating member 2 includes a hollow cylindrical body 20 with an opening 21. The driven rotating member 2 is sleeved on the rotating shaft 12 through the opening 21 to achieve the connection between the active rotating member 1 and the driven rotating member 2. Specifically, the upper end portion 121 of the rotating shaft 12 passes through the opening 21 on the end face of the driven rotating member 2 and protrudes from the driven rotating member 2. Figure 3 As shown, the driven rotating member 2 includes a hollow cylindrical body 20 and a hook portion 22 located on the outer side wall of the hollow cylindrical body 20. Specifically, the hollow cylindrical body 20 is cylindrical with a portion of its side wall being planar. The end of the hollow cylindrical body 20 has a flange 25. The hook portion 22 is plate-shaped and is connected to the flange 25 at the end of the hollow cylindrical body 20 and is parallel to and spaced apart from the planar side wall of the hollow cylindrical body 20. The hook portion 22 is configured to receive the object to be wound to fix one end of the object to be wound. When the rotation stroke compensation mechanism 10 rotates, the object to be wound covers the outer peripheral surface of the side wall of the driven rotating member 2.

[0036] A damping assembly is disposed between the driving rotating member 1 and the driven rotating member 2, and is used to generate torque between the driving rotating member 1 and the driven rotating member 2, so that the driving rotating member 1 applies driving torque to the driven rotating member 2 through the damping assembly. That is, the damping assembly is used to generate rotational friction between the driving rotating member 1 and the driven rotating member 2, so that the driving rotating member 1 drives the driven rotating member 2 to rotate together during rotation. Specifically, the damping assembly can be disposed between the substrate 11 and the end face of the hollow columnar body 20, so that the driving rotating member 1 provides driving torque to the driven rotating member 2 from between the end face of the substrate 11 and the hollow columnar body 20 through the damping assembly. Of course, the damping component can also be disposed between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20; or the damping component can also be disposed simultaneously between the substrate 11 and the end face of the hollow columnar body 20 and between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20; so that the active rotating member 1 provides driving torque to the driven rotating member 2 from between the end face of the substrate 11 and the hollow columnar body 20, and / or between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20, thereby causing the active rotating member 1 to drive the driven rotating member 2 to rotate. It should be noted that the end face of the hollow columnar body 20 involved in this application refers to the side surface of the driven rotating member 2 facing the substrate 11.

[0037] The driving torque is not greater than a preset threshold; the preset threshold is the driving torque required for the active rotating component 1 and the driven rotating component 2 to rotate relative to each other. Thus, when the driving torque is less than the preset threshold, the driven rotating component 2 can rotate together with the active rotating component 1 to wind the object onto the driven rotating component 2; when the driving torque equals the preset threshold, the driven rotating component 2 can rotate relative to the active rotating component 1 to compensate for the travel distance. Simultaneously, the driven rotating component 2 can also rotate under a driving torque of the preset threshold value to wind the object. Furthermore, the active rotating component 1 can rotate clockwise or counterclockwise to meet different rotation direction requirements, eliminating the need for foolproof design.

[0038] Those skilled in the art will understand that the object to be wound is wound around the driven rotating member 2. The winding of the object is achieved by the driving rotating member 1 driving the driven rotating member 2 to rotate. During the winding process, the object exerts a force on the driven rotating member 2 opposite to the direction of rotation of the driven rotating member 2, thus hindering the driven rotating member 2 from rotating with the driving rotating member 1. That is, the rotation of the driven rotating member requires a certain amount of driving torque, the magnitude of which depends on the magnitude of the force exerted by the object on the driven rotating member. In fact, the force exerted by the object on the driven rotating member should generally be less than a certain limit to avoid damage to the object by excessive force. In some embodiments, the stroke of the object being wound in a single operation should be consistent to ensure that the drug is accurately and consistently distributed to a preset position for inhalation by the patient during each administration process. Therefore, when the driven rotating member 2 winds a certain amount of material, its radius increases, and the stroke of a single action becomes larger than before. Consequently, the force acting on the material gradually increases, and the driving torque also increases. When it increases to a preset threshold, the driven rotating member 2 and the driving rotating member 1 rotate relative to each other, but their rotation angles are inconsistent. In a specific embodiment, the angle of the driven rotating member 2 is slightly smaller than the rotation angle of the driving rotating member 1. Therefore, the stroke of the material driven by the driven rotating member 2 tends to be consistent with the previous stroke; the stroke does not increase due to the increase in the radius of the driven rotating member 2, i.e., the stroke compensation effect. In fact, the size of the preset threshold is directly related to the type and parameter settings of the damping component and can be preset according to design needs, which will not be elaborated here. It can be understood that the material to be wound applies a certain torque to the driven rotating member 2; when the torque is less than the preset threshold, the driven rotating member 2 rotates together with the driving rotating member 1; when the torque is equal to the preset threshold, the driven rotating member 2 and the driving rotating member 1 rotate relative to each other, ultimately achieving the stroke compensation effect.

[0039] Specifically, the damping assembly includes one or more of the following: elastic material damping element 31, viscous grease damping element 32, and magnetic damping assembly 33; and the damping assembly does not include elastic damping elements made of rigid materials.

[0040] In one embodiment, such as Figure 3 As shown, the damping assembly includes an elastic material damping element 31. The elastic material damping element 31 is located between the driven rotating member 2 and the driving rotating member 1. After the driven rotating member 2 and the driving rotating member 1 are installed, the elastic material damping element 31 is in a certain compressed state, generating a certain elastic force. This, in turn, generates a certain frictional force between the driven rotating member 2 and the elastic material damping element 31, and between the elastic material damping element 31 and the driving rotating member 1, thus generating a corresponding torque. The elastic material can be a flexible material such as rubber or silicone.

[0041] In one specific embodiment, combined with Figure 3 An elastic material damping element 31 is disposed between the substrate 11 and the end face of the hollow column 20.

[0042] For details, see Figure 4 , Figure 4 This is a schematic diagram of the structure of a damping component and a substrate provided in an embodiment of this application. The damping component includes a first elastic material damping element 311, which is disposed between the substrate 11 and the end face of the hollow columnar body 20. The first elastic material damping element 311 is in a closed-loop shape, for example, a closed circular ring. In this way, the first elastic material damping element 311 can be used to seal the circuit and prevent external dust particles or powder of the object to be wound from entering the inner ring of the rotation stroke compensation mechanism 10 and affecting the damping component of the inner ring.

[0043] In a specific embodiment, see Figure 5 , Figure 5 This is a schematic diagram of the structure of a damping component and a substrate provided in another embodiment of this application. The damping component further includes one or more second elastic material damping elements 312, which are spaced apart. Each second elastic material damping element 312 is disposed between the end face of the substrate 11 and the hollow columnar body 20, and is located on the side of the first elastic material damping element 311 near the rotating shaft 12. Specifically, the first elastic material damping element 311 is arranged around the periphery of one or more second elastic material damping elements 312.

[0044] In one specific embodiment, such as Figure 5 As shown, each second elastic material damping element 312 is in a closed-loop shape; thus, the closed-loop second elastic material damping element 312 can be used to play a certain sealing role, and the damping assembly generates a uniform torque between the active rotating element 1 and the driven rotating element 2 in the circumferential direction of the rotating shaft 12, which facilitates the stable rotation of the rotation stroke compensation mechanism 10.

[0045] Specifically, the first elastic material damping element 311 and a plurality of second elastic material damping elements 312 are coaxially sleeved; specifically, the first elastic material damping element 311 and each of the second elastic material damping elements 312 can be sleeved around the rotating shaft 12.

[0046] In another specific embodiment, see [reference] Figure 6 , Figure 6This is a schematic diagram of the damping component and substrate provided in another embodiment of this application; each second elastic material damping element 312 is sheet-shaped, and multiple sheet-shaped second elastic material damping elements 312 are spaced apart along the circumferential direction of the rotation axis 12, forming at least one annulus. The sheet shape can be arbitrary, such as rectangular, circular, arc-shaped, or fan-shaped. Specifically, the first elastic material damping element 311 and the at least one annulus formed by the multiple sheet-shaped second elastic material damping elements 312 are coaxially sleeved, and can all be sleeved around the rotation axis 12.

[0047] Of course, in other specific embodiments, those skilled in the art will understand that when there are multiple second elastic material damping elements 312, the multiple second elastic material damping elements 312 may also be partially closed-loop or partially sheet-like. Moreover, the first elastic material damping element 311 may also be sheet-like; based on this, sealing elements, such as sealing rings, may be provided to seal the rotational stroke compensation mechanism 10.

[0048] Because the first elastic material damping element 311 is located on the outer ring, it is easily damaged by external dust particles or powder from the material to be wound. To reduce the impact of damage to the first elastic material damping element 311 on the frictional force generated between the entire damping assembly and the active rotating element 1 and the driven rotating element 2, the torque generated by the first elastic material damping element 311 between the active rotating element 1 and the driven rotating element 2 can be much smaller than the torque generated by all the second elastic material damping elements 312 between the active rotating element 1 and the driven rotating element 2. For example, the torque generated by the first elastic material damping element 311 between the active rotating element 1 and the driven rotating element 2 is more than an order of magnitude smaller than the torque generated by all the second elastic material damping elements 312 between the active rotating element 1 and the driven rotating element 2. Thus, even if the first elastic material damping element 311 is damaged, the change in the overall torque generated by the damping assembly between the active rotating element 1 and the driven rotating element 2 will not be too large, effectively extending the service life of the rotational stroke compensation mechanism 10.

[0049] In some specific embodiments, the first elastic material damping element 311 and the second elastic material damping element 312 have the same cross-sectional area, and both are closed-loop in shape, meaning they have essentially the same compressive deformation. Simultaneously, the elastic coefficient and / or friction coefficient of the first elastic material damping element 311 are less than the elastic coefficient and / or friction coefficient of each of the second elastic material damping elements 312, so that the torque generated by the first elastic material damping element 311 between the driving rotating element 1 and the driven rotating element 2 is less than the torque generated by all the second elastic material damping elements 312 between the driving rotating element 1 and the driven rotating element 2. It should be noted that, combined with... Figure 3 The cross-sectional area of ​​the elastic material damping member 31 involved in this application refers to the cross-sectional area of ​​the elastic material damping member 31 along the vertical direction of the rotation stroke compensation mechanism 10.

[0050] The specific difference between the elastic coefficient and / or friction coefficient of the first elastic material damping member 311 and the elastic coefficient and / or friction coefficient of the second elastic material damping member 312 can be set according to the actual situation. This application does not limit this, as long as it ensures that the torque generated by all the second elastic material damping members 312 between the active rotating member 1 and the driven rotating member 2 is greater than the torque generated by the first elastic material damping member 311 between the active rotating member 1 and the driven rotating member 2.

[0051] Of course, in other embodiments, the elastic coefficient of the first elastic material damping member 311 can be the same as the elastic coefficient of each second elastic material damping member 312, and the cross-sectional area of ​​the first elastic material damping member 311 is smaller than the cross-sectional area of ​​each second elastic material damping member 312. Alternatively, the elastic coefficient and cross-sectional area of ​​each second elastic material damping member 312 can both be greater than the elastic coefficient and cross-sectional area of ​​the first elastic material damping member 311. It can be understood that in the above embodiments, the torque generated by the first elastic material damping member 311 and the second elastic material damping member 312 can be adjusted by adjusting parameters such as the elastic system, friction coefficient, and compressive deformation of the two, so as to avoid a significant impact on the overall torque of the device after one of them is abnormally affected.

[0052] Specifically, there are multiple second elastic material damping elements 312. The torque generated by the multiple second elastic material damping elements 312 between the active rotating element 1 and the driven rotating element 2 gradually increases in the direction close to the rotating shaft 12. In this way, after the outer ring elastic material damping elements 31 are damaged and fail, the influence ratio of these elastic material damping elements 31 on the torque generated by the entire damping assembly between the active rotating element 1 and the driven rotating element 2 can be reduced, and the normal operation of the effective rotation stroke compensation mechanism 10 can be ensured.

[0053] Those skilled in the art will understand that when the multiple second elastic material damping elements 312 are all closed-loop and coaxially sleeved around the rotating shaft 12, the torque generated by the multiple second elastic material damping elements 312 between the active rotating member 1 and the driven rotating member 2 gradually increases in the direction closer to the rotating shaft 12. When the multiple second elastic material damping elements 312 are all sheet-like and form multiple rings, the torque generated by the second elastic material damping elements 312 corresponding to the multiple rings between the active rotating member 1 and the driven rotating member 2 gradually increases in the direction closer to the rotating shaft 12. For example, multiple sheet-like second elastic material damping elements 312 form three rings. The first ring is closest to the first elastic material damping element 311, the second ring is next, and the third ring is the farthest. Then, the torque generated by the multiple second elastic material damping elements 312 corresponding to the first ring between the active rotating element 1 and the driven rotating element 2 is less than the torque generated by the multiple second elastic material damping elements 312 corresponding to the second ring between the active rotating element 1 and the driven rotating element 2. The torque generated by the multiple second elastic material damping elements 312 corresponding to the second ring between the active rotating element 1 and the driven rotating element 2 is less than the torque generated by the multiple second elastic material damping elements 312 corresponding to the third ring between the active rotating element 1 and the driven rotating element 2.

[0054] In a specific embodiment, see Figure 7 , Figure 7 This is a disassembled vertical sectional view of the active and driven rotating components. A first locking groove A is formed on one side of the substrate 11 facing the end face of the hollow cylindrical body 20. A portion of the first elastic material damping member 311 or the second elastic material damping member 312 is elastically compressed within the first locking groove A and abuts against the bottom wall of the first locking groove A. The end face of the hollow cylindrical body 20 is a flat surface and fits against the surface of the active rotating component 1 to compress the first elastic material damping member 311 or the second elastic material damping member 312 located within the first locking groove A. This generates torque between the driven rotating component 2 and the elastic material damping member 31, and between the elastic material damping member 31 and the active rotating component 1, using the first elastic material damping member 311 and / or the second elastic material damping member 312. Specifically, one first snap-fit ​​groove A corresponds to one first elastic material damping element 311 or one second elastic material damping element 312; the number of first snap-fit ​​grooves A is the same as the sum of the number of first elastic material damping elements 311 and second elastic material damping elements 312.

[0055] Of course, please continue reading Figure 7Alternatively, a second snap-fit ​​groove B can be formed on the end face of the hollow columnar body 20. A portion of the first elastic material damping member 311 or the second elastic material damping member 312 is elastically compressed within the second snap-fit ​​groove B and abuts against the bottom wall of the second snap-fit ​​groove B. The surface of the substrate 11 corresponding to the end face of the hollow columnar body 20 is a flat surface and fits against the end face of the hollow columnar body 20 to compress the first elastic material damping member 311 or the second elastic material damping member 312 located within the second snap-fit ​​groove B. Specifically, one second snap-fit ​​groove B corresponds to one first elastic material damping member 311 or one second elastic material damping member 312; the number of second snap-fit ​​grooves B is the same as the sum of the number of first elastic material damping members 311 and second elastic material damping members 312.

[0056] Alternatively, a first snap-fit ​​groove A can be formed on one side of the substrate 11 facing the hollow columnar body 20. A portion of the first elastic material damping member 311 or the second elastic material damping member 312 is elastically compressed within the first snap-fit ​​groove A and abuts against the bottom wall of the first snap-fit ​​groove A. A second snap-fit ​​groove B can be formed on the end face of the hollow columnar body 20. A portion of the first elastic material damping member 311 or the second elastic material damping member 312 is elastically compressed within the second snap-fit ​​groove B and abuts against the bottom wall of the second snap-fit ​​groove B. The total depth of the first snap-fit ​​groove A and the second snap-fit ​​groove B is less than the thickness of the first elastic material damping member 311 or less than the thickness of the second elastic material damping member 312. One first snap-fit ​​groove A corresponds to one second snap-fit ​​groove B. Figure 3 Thickness refers to the vertical dimension of the elastic material damping component 31.

[0057] By setting the first snap-fit ​​groove A and / or the second snap-fit ​​groove B, the first elastic material damping member 311 and / or the second elastic material damping member 312 can be limited, preventing relative displacement between the first elastic material damping member 311 and / or the second elastic material damping member 312 and the base plate 11 and the driven rotating member 2 during the operation of the rotation stroke compensation mechanism 10, which would affect the compensation effect.

[0058] In another specific embodiment, see [reference] Figure 8 , Figure 8This is a schematic diagram of a structure in which an elastic material damping element is disposed between the outer surface of the rotating shaft and the inner surface of the hollow columnar body. The first elastic material damping element 311 and / or the second elastic material damping element 312 may also be disposed between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20; or the first elastic material damping element 311 and / or the second elastic material damping element 312 may be disposed between the substrate 11 and the end face of the hollow columnar body 20, and between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20. For ease of distinction, the first elastic material damping element 311 disposed between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20 will be referred to as the third elastic material damping element 313; and the second elastic material damping element 312 disposed between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20 will be referred to as the fourth elastic material damping element 314.

[0059] Specifically, such as Figure 8 As shown, the damping assembly includes a third elastic material damping element 313. The third elastic material damping element 313 is disposed between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow cylindrical body 20; and the third elastic material damping element 313 is annular; for example, it is a closed ring; in this way, the third elastic material damping element 313 can be used to perform a sealing function to prevent external dust particles or powder of the object to be wound from entering the inner ring of the rotation stroke compensation mechanism 10 and affecting the inner ring part of the damping assembly.

[0060] For a detailed description of the specific implementation, please refer to the following documentation. Figure 8 The damping assembly also includes one or more fourth elastic material damping elements 314. The plurality of fourth elastic material damping elements 314 are spaced apart between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow column 20 along the axial direction of the rotating shaft 12, and each fourth elastic material damping element 314 is located on the side of the third elastic material damping element 313 near the substrate 11.

[0061] In one specific embodiment, each fourth elastic material damping element 314 is in a closed-loop shape. In this way, the closed-loop fourth elastic material damping element 314 can be used to play a certain sealing role and make the damping assembly generate a uniform torque between the active rotating element 1 and the driven rotating element 2 along the circumferential direction of the rotating shaft 12, which facilitates the stable rotation of the rotation stroke compensation mechanism 10.

[0062] The above-mentioned method makes each elastic material damping element 31 a closed annular shape. The third elastic material damping element 313, which is closest to the opening 21 of the driven rotating element 2, can play a sealing role to prevent the powder of the medicine from further entering the interior of the rotation stroke compensation mechanism 10, prevent multiple fourth elastic damping elements from losing their effect, and both the third elastic material damping element 313 and the fourth elastic material damping element 314 can enable the driving rotating element 1 to apply driving torque to the driven rotating element 2.

[0063] In another specific embodiment, each fourth elastic material damping element 314 is sheet-shaped, and multiple fourth elastic material damping elements 314 are spaced apart along the circumferential direction of the rotation shaft 12, forming at least one ring. The specific distribution of the sheet-shaped fourth elastic material damping elements 314 on the rotation shaft 12 is similar to the specific distribution of the multiple sheet-shaped second elastic materials spaced apart on the substrate 11, forming at least one ring, as described above, and will not be repeated here. In addition, similar to the distribution of the first elastic material damping elements 311 and the second elastic material damping elements 312, the fourth elastic material damping elements 314 may also be partially closed-loop and partially sheet-shaped, and the third elastic material damping element 313 may also be sheet-shaped; the two can be combined in any way.

[0064] As can be understood above, the third elastic material damping element 313 is also susceptible to damage from external dust particles or powder from the object to be wound. Therefore, the torque generated by the third elastic material damping element 313 between the active rotating element 1 and the driven rotating element 2 can be much smaller than the torque generated by all the fourth elastic material damping elements 314 between the active rotating element 1 and the driven rotating element 2. In this way, even if the third elastic material damping element 313 is damaged, the change in torque generated by the damping assembly as a whole between the active rotating element 1 and the driven rotating element 2 will not be too large, which can effectively extend the service life of the rotational stroke compensation mechanism 10. The specific implementation method is similar to the implementation method where the torque generated by the first elastic material damping element 311 between the active rotating element 1 and the driven rotating element 2 is much smaller than the torque generated by all the second elastic material damping elements 312 between the active rotating element 1 and the driven rotating element 2.

[0065] Specifically, the third elastic material damping element 313 and the fourth elastic material damping element 314 have the same cross-sectional area, and both are closed-loop. The elastic coefficient of the third elastic material damping element 313 is smaller than that of each of the fourth elastic material damping elements 314, so that the torque generated by the third elastic material damping element 313 between the driving rotating element 1 and the driven rotating element 2 is less than the torque generated by all the fourth elastic material damping elements 314 between the driving rotating element 1 and the driven rotating element 2. Of course, similar to the first elastic material damping element 311 and the second elastic material assembly, the torque generated by the third elastic material damping element 313 between the driving rotating element 1 and the driven rotating element 2 can be changed by altering the elastic coefficients and / or cross-sectional areas of the third elastic material damping element 313 and the fourth elastic material damping element 314, so that the torque generated by the third elastic material damping element 313 between the driving rotating element 1 and the driven rotating element 2 is less than the torque generated by all the fourth elastic material damping elements 314 between the driving rotating element 1 and the driven rotating element 2. The specific relationship between the elastic coefficients and / or cross-sectional areas is similar to that described above and will not be repeated here.

[0066] Specifically, there are multiple fourth elastic material damping elements 314, and the torque generated by these multiple fourth elastic material damping elements 314 between the active rotating element 1 and the driven rotating element 2 gradually increases along the direction closer to the substrate 11. The advantage is that when the third elastic material damping element 313 on the side near the opening 21 of the driven rotating element 2 is affected by pharmaceutical powder or the like, the overall frictional force generated by the damping assembly between the active rotating element 1 and the driven rotating element 2 does not change significantly.

[0067] Those skilled in the art will understand that when the plurality of fourth elastic material damping elements 314 are all in a closed-loop shape and spaced apart along the axial direction of the rotating shaft 12, the torque generated by the plurality of fourth elastic material damping elements 314 between the active rotating member 1 and the driven rotating member 2 gradually increases along the direction closer to the substrate 11. When the plurality of fourth elastic material damping elements 314 are all in a sheet shape and form a plurality of rings arranged along the axial direction of the rotating shaft 12, the torque generated by the fourth elastic material damping elements 314 corresponding to the plurality of rings between the active rotating member 1 and the driven rotating member 2 gradually increases along the direction closer to the substrate 11. For example, multiple sheet-like fourth elastic material damping elements 314 form three rings. The first ring is closest to the third elastic material damping element 313, the second ring is next, and the third ring is the farthest. Then, the torque generated by the multiple fourth elastic material damping elements 314 corresponding to the first ring between the active rotating element 1 and the driven rotating element 2 is less than the torque generated by the multiple fourth elastic material damping elements 314 corresponding to the second ring between the active rotating element 1 and the driven rotating element 2. The torque generated by the multiple fourth elastic material damping elements 314 corresponding to the second ring between the active rotating element 1 and the driven rotating element 2 is less than the torque generated by the multiple fourth elastic material damping elements 314 corresponding to the third ring between the active rotating element 1 and the driven rotating element 2.

[0068] In this specific embodiment, similarly, in order to limit the third elastic material damping member 313 and / or the fourth elastic material damping member 314 and prevent relative displacement between the third elastic material damping member 313 and / or the fourth elastic material damping member 314 and the rotating shaft 12 and the driven rotating member 2 during the operation of the rotation stroke compensation mechanism 10, thus affecting the compensation effect, a third locking groove can be formed on the outer surface 24 of the rotating shaft 12, and / or a fourth locking groove can be formed on the inner surface 23 of the hollow column 20. Part of the third elastic material damping member 313 or the fourth material damping member is elastically compressed in the third locking groove and abuts against the bottom wall of the third locking groove; and / or part of the third elastic material damping member 313 or the fourth material damping member is elastically compressed in the second locking groove B and abuts against the bottom wall of the second locking groove B; the inner surface 23 of the hollow column 20 is in contact with the outer surface 24 of the rotating shaft 12 to compress the third elastic material damping member 313 and / or the fourth material damping member. In this configuration, one snap-fit ​​groove corresponds to one elastic material damping element 31; when the third snap-fit ​​groove and the fourth snap-fit ​​groove appear simultaneously, the third snap-fit ​​groove and the fourth snap-fit ​​groove are arranged opposite to each other to jointly clamp the same elastic material damping element 31.

[0069] Those skilled in the art will understand that the aforementioned elastic material damping element 31 can be disposed between the end face of the substrate 11 and the hollow column 20, or between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow column 20, or simultaneously disposed between the end face of the substrate 11 and the hollow column 20 and between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow column 20. The specific structure and function are all involved in the above embodiments and will not be repeated here.

[0070] In another embodiment, see Figure 9 , Figure 9 for Figure 1 Another disassembly diagram of the structure shown; Figure 10 for Figure 9 The vertical sectional view of the corresponding rotational stroke compensation mechanism; the damping component includes a viscous grease damping element 32. The viscous grease damping element 32 is located between the driven rotating element 2 and the driving rotating element 1. After the driven rotating element 2 and the driving rotating element 1 are installed, the driven rotating element 2 can rotate relative to the driving rotating element 1. The viscous grease damping element 32 generates a certain torque between itself and the driven rotating element 2 and the driving rotating element 1 through its own viscosity. The viscosity of the grease and the contact area between the viscous grease damping element 32 and the driving rotating element 1 and the driven rotating element 2 determine the magnitude of the torque. The viscous grease damping element 32 can be a high-viscosity damping grease composed of an inorganic thickener thickened with an extremely high-viscosity synthetic oil; see existing technology for details.

[0071] In some specific embodiments, such as Figure 9As shown, the viscous grease damping element 32 is a hollow column, and as... Figure 10 As shown, the hollow cylindrical viscous grease damping element 32 is sleeved on the outer surface 24 of the rotating shaft 12 and is located between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow cylindrical body 20.

[0072] Specifically, in combination Figure 9 and Figure 10 The rotational stroke compensation mechanism 10 also includes a first seal a and a second seal b. The first seal a and the second seal b are clamped between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow cylindrical body 20, and as shown... Figure 10 As shown, the first seal a and the second seal b are respectively disposed at the upper and lower opposite ends of the hollow cylindrical viscous grease damping member 32 to prevent powder of the object to be wound or other external dust and particles from adhering to the viscous grease damping member 32, affecting the damping effect of the viscous grease damping member 32, and causing the viscous grease damping member 32 to fail. The first seal a and / or the second seal b can be sealing rings, such as rubber or silicone rings.

[0073] Specifically, a limiting groove can also be formed on the outer surface 24 of the rotating shaft 12 and / or the inner surface 23 of the hollow column 20 corresponding to the positions of the first sealing ring and / or the second sealing ring. The first sealing ring and / or the second sealing ring are located in the limiting groove so as to limit the first sealing ring and / or the second sealing ring through the limiting groove and enhance the sealing effect.

[0074] In other specific embodiments, see Figure 11 , Figure 11 for Figure 1 Another vertical sectional view of the structure shown; Figure 12 for Figure 11 A top view of the medium-viscosity grease damping element, the first seal, and the second seal on the substrate; the medium-viscosity grease damping element 32 is annular and is disposed between the substrate 11 and the end face of the hollow columnar body 20. In this specific embodiment, combined with Figure 11 and Figure 12 The first sealing element a and the second sealing element b are specifically disposed between the end face of the substrate 11 and the hollow columnar body 20, and the first sealing element a and the second sealing element b are respectively disposed on the outer side and the inner side of the annular viscous grease damping element 32.

[0075] The viscous grease damping element 32 can be disposed only between the end faces of the substrate 11 and the hollow columnar body 20; or, the viscous grease damping element 32 can be disposed only between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20, as described above. Of course, the viscous grease damping element 32 can also be disposed between the end faces of the substrate 11 and the hollow columnar body 20, and between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow columnar body 20; in this case, one of the first sealing element a and the second sealing element b is disposed on the outside of the annular viscous grease damping element 32, and the other is disposed on the end of the hollow columnar viscous grease damping element 32 facing away from the substrate 11. The specific structure and function are all involved in the above embodiments and will not be repeated here.

[0076] In yet another embodiment, see Figure 13 and Figure 14 , Figure 13 for Figure 1 Another disassembly diagram of the structure shown; Figure 14 for Figure 13 A vertical sectional view of the corresponding rotational stroke compensation mechanism; the damping assembly includes a magnetic damping assembly 33. The magnetic damping assembly 33 includes a first magnetic element 331 and a second magnetic element 332 that are arranged opposite to each other and have opposite magnetic properties; one of the first magnetic element 331 and the second magnetic element 332 is disposed on the side of the driven rotating member 2 facing the driving rotating member 1, and the other is disposed on the side of the driving rotating member 1 facing the driven rotating member 2. After the driven rotating member 2 and the driving rotating member 1 are installed, the first magnetic element 331 and the second magnetic element 332 attract each other magnetically to generate torque between the first magnetic element 331 and the second magnetic element 332.

[0077] In one specific embodiment, such as Figure 13 and Figure 14 As shown, the first magnetic element 331 and the second magnetic element 332 are located between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow cylindrical body 20. The first magnetic element 331 is made of ferromagnetic material and is disposed on the inner surface 23 of the hollow cylindrical body 20 facing the rotating shaft 12; the second magnetic element 332 is a magnet and is disposed on the inner surface 23 of the rotating shaft 12 facing the hollow cylindrical body 20; the first magnetic element 331 and the second magnetic element 332 attract each other magnetically to generate torque between the first magnetic element 331 and the second magnetic element 332. Of course, the first magnetic element 331 can also be a magnet and the second magnetic element 332 can be made of ferromagnetic material.

[0078] In another specific embodiment, the magnetic damping assembly 33, namely the first magnetic element 331 and the second magnetic element 332, is disposed between the substrate 11 and the end face of the hollow column 20. Specifically, the first magnetic element 331 is made of ferromagnetic material and is disposed on the side of the end face of the hollow column 20 facing the substrate 11; the second magnetic element 332 is a magnet and is disposed on the side of the substrate 11 facing the end face of the hollow column 20; the first magnetic element 331 and the second magnetic element 332 attract each other magnetically to generate torque between the first magnetic element 331 and the second magnetic element 332. Of course, the first magnetic element 331 can also be a magnet and the second magnetic element 332 can be made of ferromagnetic material.

[0079] The magnetic damping component 33 can be disposed only between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow column 20; or it can be disposed only between the substrate 11 and the end face of the hollow column 20. Of course, the magnetic damping component 33 can also be disposed between the end face of the substrate 11 and the hollow column 20, and between the outer surface 24 of the rotating shaft 12 and the inner surface 23 of the hollow column 20. The specific structure and function are all involved in the above embodiments and will not be repeated here.

[0080] The rotational stroke compensation mechanism 10 provided in this embodiment includes an active rotating member 1, a driven rotating member 2, and a damping assembly. The active rotating member 1 is connected to a driving assembly and rotates under the action of the driving assembly. The driven rotating member 2, connected to the active rotating member 1, is used to wind the object to be wound. A damping assembly is provided between the active rotating member 1 and the driven rotating member 2 to generate torque between them, allowing the active rotating member 1 to apply a driving torque to the driven rotating member 2 through the damping assembly. When the driving torque is less than a preset threshold, the driven rotating member 2 can rotate together with the active rotating member 1 to wind the object to be wound onto the driven rotating member 2. When the driving torque is equal to the preset threshold, the driven rotating member 2 can rotate relative to the active rotating member 1. Torque is generated by friction from the compression of elastic materials, viscous grease, and magnetic materials. The rotational stroke compensation mechanism 10 can compensate for the stroke, and the active rotating component 1 can rotate clockwise or counterclockwise to meet different rotation direction requirements. It is universally applicable in drug delivery systems with dual drug delivery belts and does not require error-proofing. Furthermore, compared to solutions using rigid elastic materials as compensation mechanisms, the solution in this application eliminates the continuous large tension on the drug delivery belt after each individual compensation process. This reduces the impact of tension on other structural components such as the drug delivery belt, and decreases the design complexity of other mechanisms, such as reducing the use of ratchet mechanisms.

[0081] See Figure 15 , Figure 15This is a schematic diagram of the internal structure of a drug delivery dispenser provided in one embodiment of this application. In this embodiment, a drug delivery dispenser is provided. The dispenser typically includes a body or housing, within which a drug carrier is located. The drug carrier is in the form of an elongated blister strip containing multiple discrete doses of drug in powder or tablet form. The elongated blister strip includes a substrate having pouches defined therein and a cap disposed on the substrate, wherein the substrate and cap are peelable to allow access to the contents of each pouch. Such a device typically includes a mechanism for accessing these doses, comprising a peeling device for peeling the cap off the substrate. This makes the drug available for delivery to a patient.

[0082] A suitable peeling device is positioned to peel the base and lid of the bag at the open position of the device. The peeling device typically includes a (lid or base) sheet drive for pulling the lid sheet away from the base sheet of the bag received at the open station. On one hand, the sheet drive includes a wheel of fixed diameter on which the (e.g., lid) sheet is wound, the wheel having an effective winding surface whose diameter increases as more (e.g., lid) sheet is wound onto the wheel.

[0083] The problem with using such a sizing wheel as a sheet actuator for driving drug carrier sheets is that the effective winding diameter of the wheel increases as the sheet is wound onto it, thus increasing its effective lateral pulling force (i.e., the length of the pulling force). This is problematic because it is desirable for the drug carrier bags to experience a limited pulling force in the open position during actuation to ensure that each bag of drug carrier experiences a roughly uniform indexing / opening effect. Generally, insufficient pulling will result in the bags not opening, while excessive pulling will stress the mechanical components and increase the force required to actuate the dispenser.

[0084] The drug delivery dispenser provided in this embodiment includes a rotational stroke compensation mechanism 10 and a drive assembly. The rotational stroke compensation mechanism 10 compensates for any increase in the diameter of the effective winding surface of the wheel during use of the dispenser, thereby ensuring that the drug carrier is uniformly graded with each actuation of the dispensing mechanism. This rotational stroke compensation mechanism 10 is the same as that described in any of the above embodiments. The specific structure and function of the rotational stroke compensation mechanism 10 can be found in the relevant descriptions of the rotational stroke compensation mechanism 10 provided in the above embodiments, and will not be repeated here. In this embodiment, the object to be wound can be a substrate or a cover sheet.

[0085] The drive assembly is connected to the active rotating element 1 and is used to drive the active rotating element 1 to rotate. In a specific embodiment, the drive assembly includes a motor, preferably an electric motor. The motor can provide rotational drive. The motor may include, for example, a DC motor, a piezoelectric (PZ) motor, an ultrasonic motor, a solenoid motor, or a linear motor. Preferably, the electronic drive system includes a DC motor, a PZ motor, or an ultrasonic motor. The drive assembly can also be a manually actuated structure, such as a transmission handle.

[0086] In one specific embodiment, the drug dispensing device includes two rotational stroke compensation mechanisms 10; one rotational stroke compensation mechanism 10 rotates clockwise, and the other rotates counterclockwise 10. Specifically, the drug dispensing device can accommodate two drug carriers, with each drug carrier corresponding to one of the two rotational stroke compensation mechanisms 10.

[0087] Specifically, the drug dispensing device also includes an indexing wheel, an opening station, and a base unit; the indexing wheel, the opening station, and the rotational stroke compensation mechanism 10 are all located on one side surface of the base unit. The drug carrier, i.e., the blister pack, has multiple bladders spaced along its length. Two blister packs are positioned on the side of the two rotational stroke compensation mechanisms 10 away from the edge of the dispenser to form a left chamber and a right chamber. In the drug dispensing device, each blister pack engages with its respective indexing wheel, thereby guiding the continuous bladders to the central opening station. The two indexing wheels are arbitrarily joined together by gear rotation. At the opening station, the base and cover portions of each blister pack can be peeled off from their tips, resulting in an empty base pack coiled in its respective receiving chamber, and the resulting cover pack being the aforementioned material to be wound. One end of the material to be wound is fixed to a hook on the driven rotating component. The drive assembly provides a relatively stable driving force to each rotational stroke compensation mechanism 10. During operation, the effective winding diameter of the paper tape on each driven rotating component gradually increases, and each rotational stroke compensation mechanism 10 can provide driving compensation during operation.

[0088] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A rotary stroke compensation mechanism, characterized in that, include: An active rotating component is used to connect to the drive assembly and rotate under the action of the drive assembly; The driven rotating component is rotatably connected to the driving rotating component and is used to wind the object to be wound. A damping assembly is disposed between the active rotating member and the driven rotating member, such that the active rotating member applies a driving torque to the driven rotating member through the damping assembly; Wherein, the driving torque is not greater than a preset threshold; The preset threshold is the driving torque when the active rotating component and the driven rotating component rotate relative to each other.

2. The rotary stroke compensation mechanism according to claim 1, characterized in that, The driving torque applied to the driven rotating member is the same whether the active rotating member rotates clockwise or counterclockwise.

3. The rotary stroke compensation mechanism according to claim 1, characterized in that, The damping assembly does not include elastic damping elements made of rigid materials.

4. The rotary stroke compensation mechanism according to claim 1, characterized in that, The damping component includes one or more of the following: elastic material damping components, viscous grease damping components, and magnetic damping components.

5. The rotary stroke compensation mechanism according to claim 4, characterized in that, The active rotating component includes a rotating shaft and a base plate; the rotating shaft is vertically connected to one side surface of the base plate; the driven rotating component includes a hollow columnar body with an opening and is sleeved on the rotating shaft; the damping component is disposed between the end faces of the base plate and the hollow columnar body, and / or, disposed between the outer surface of the rotating shaft and the inner surface of the hollow columnar body.

6. The rotary stroke compensation mechanism according to claim 5, characterized in that, The damping assembly includes a first elastic material damping element disposed between the substrate and the end face of the hollow column; and / or disposed between the outer surface of the rotating shaft and the inner surface of the hollow column; Furthermore, the first elastic material damping element is in a closed-loop shape.

7. The rotary stroke compensation mechanism according to claim 6, characterized in that, The damping assembly further includes at least one second elastic material damping element spaced apart; the at least one second elastic material damping element is disposed between the end face of the substrate and the hollow columnar body, and is located on the side of the first elastic material damping element near the rotating shaft; and / or, The at least one second elastic material damping element is disposed between the outer surface of the rotating shaft and the inner surface of the hollow column, and is located on the side of the first elastic material damping element closer to the substrate.

8. The rotary stroke compensation mechanism according to claim 7, characterized in that, The at least one second elastic material damping element is in a closed-loop shape, and the first elastic material damping element and the at least one second elastic material damping element are coaxially sleeved. Alternatively, the at least one second elastic material damping element is sheet-shaped and is spaced apart along the circumferential direction of the axis of rotation to form at least one ring, and the first elastic material damping element and at least one ring are coaxially sleeved together.

9. The rotary stroke compensation mechanism according to claim 8, characterized in that, The torque generated by the first elastic material damping element between the active rotating element and the driven rotating element is less than the torque generated by the at least one second elastic material damping element between the active rotating element and the driven rotating element.

10. The rotary stroke compensation mechanism according to claim 9, characterized in that, The number of the second elastic material damping elements is multiple, and the torque generated by the multiple second elastic material damping elements between the active rotating element and the driven rotating element gradually increases in the direction close to the rotating shaft.

11. The rotary stroke compensation mechanism according to any one of claims 6-10, characterized in that, The damping assembly includes an elastic material damping element, and the active rotating element has a first locking groove on one side surface facing the driven rotating element, and / or the driven rotating element has a second locking groove on one side surface facing the active rotating element. The elastic damping element is partially elastically compressed within the first snap-fit ​​groove and abuts against the bottom wall of the first snap-fit ​​groove; and / or the elastic damping element is partially elastically compressed within the second snap-fit ​​groove and abuts against the bottom wall of the second snap-fit ​​groove; the driven rotating element and the surface of the driving rotating element are in contact.

12. The rotary stroke compensation mechanism according to claim 5, characterized in that, The damping assembly includes the viscous grease damping element; the viscous grease damping element includes an annular viscous grease damping element disposed between the end faces of the substrate and the hollow columnar body, and / or the viscous grease damping element includes a hollow columnar viscous grease damping element disposed between the outer surface of the rotating shaft and the inner surface of the hollow columnar body.

13. The rotary stroke compensation mechanism according to claim 12, characterized in that, It also includes: a first seal and a second seal, sandwiched between the active rotating member and the driven rotating member; The viscous grease damping element includes an annular viscous grease damping element disposed between the end faces of the substrate and the hollow columnar body, wherein the first sealing element and the second sealing element are respectively disposed on the outer and inner sides of the annular viscous grease damping element; and / or The viscous grease damping component includes a hollow cylindrical viscous grease damping component disposed between the outer surface of the rotating shaft and the inner surface of the hollow cylindrical body, and the first sealing component and the second sealing component are respectively disposed at opposite ends of the hollow cylindrical viscous grease damping component.

14. The rotary stroke compensation mechanism according to claim 4, characterized in that, The damping assembly includes a magnetic damping assembly; the magnetic damping assembly includes: a first magnetic element and a second magnetic element disposed opposite to each other; one of the first magnetic element and the second magnetic element is disposed on the side of the driven rotating member facing the driving rotating member, and the other is disposed on the side of the driving rotating member facing the driven rotating member, and the first magnetic element and the second magnetic element attract each other magnetically to generate torque between the first magnetic element and the second magnetic element.

15. A drug dispensing device, characterized in that, The rotary stroke compensation mechanism is the rotary stroke compensation mechanism as described in any one of claims 1-14; A drive component, connected to the active rotating component, is used to drive the active rotating component to rotate.

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