Roller shutter lifting mechanism and roller shutter structure

Abstract

The utility model discloses a roller shutter lifting mechanism and a roller shutter structure. The roller shutter lifting mechanism comprises a shell. A central shaft; the inner cylinder is arranged on the central shaft in a sleeving manner; the outer cylinder is arranged on the inner cylinder in a sleeving manner; the driving assembly can drive the outer cylinder to rotate; the outer circumferential wall of the inner cylinder is provided with a track groove surrounding the inner cylinder by a circle, the inner wall of the outer cylinder is provided with a concave part, and a track ball is arranged between the concave part and the track groove; a plurality of V-shaped guide grooves which are arranged at intervals are formed in the peripheral wall of the inner cylinder, and positioning positions are arranged in the guide grooves; the guide groove is communicated with the track groove; the track groove comprises a track section located between openings in the two ends of the guide groove. When the driving assembly drives the outer cylinder to rotate and drives the trackball to enter the guide groove to the positioning position, the trackball and the outer cylinder are locked and stop rotating; the driving assembly drives the outer cylinder to rotate and drives the trackball to enter the track section, so that the trackball continuously moves in the track groove, and the trackball and the outer cylinder can rotate.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling curtains, in particular to a rolling curtain lifting mechanism and a rolling curtain structure. Background Art

[0002] Roller blinds are one of the window decoration products. They are suitable for many places, such as business office buildings, hotels, restaurants, offices, homes, and are especially suitable for large-area glass curtain walls. Roller blinds are made by processing curtain fabric with resin and rolling it into a roller shape. The curtains are raised and lowered by using a pull rope or chain. When the curtain fabric is lowered, it can soften the indoor light and avoid the trouble of direct sunlight, achieving a good sunshade effect. When the curtain is raised, its volume is very small, so it is not easy to be noticed. However, due to the certain weight of the roller blind itself, when the anti-reverse force of the roller blind lifting mechanism is not enough, the roller blind will fall due to its own gravity, or the positioning of the rise and fall of the roller blind is not accurate enough, which needs further improvement. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the utility model is to provide a rolling curtain lifting mechanism and a rolling curtain structure, which are provided with a positioning position in the guide groove, so that the rolling curtain can stay at different heights with precise positioning, and when locked, the locking force is strong through the cooperation between the trackball and the positioning position, thereby solving the problem in the prior art that the rolling curtain will fall due to its own gravity.

[0005] (II) Technical solution

[0006] The utility model solves the above technical problems by adopting a rolling curtain lifting mechanism, which is used to be installed on the shaft end of a hollow rolling curtain shaft, on which a rolling curtain is wound. The rolling curtain lifting mechanism includes

[0007] shell;

[0008] A central axis, which is fixedly arranged relative to the outer shell, and one end of the central axis along its length direction is fixedly connected to the outer shell;

[0009] An inner cylinder, which is sleeved on the central axis and fixed relative to the central axis;

[0010] An outer cylinder is sleeved on the inner cylinder and connected to the roller blind shaft; and the inner cylinder can rotate around its own central axis;

[0011] A driving assembly connected to the outer cylinder and capable of driving the outer cylinder to rotate around its own central axis;

[0012] The outer wall of the inner cylinder is provided with a track groove which surrounds the whole circle, the inner wall of the outer cylinder is provided with a recess, and a track ball is provided between the recess and the track groove; when the outer cylinder rotates, the track ball can be driven to move around the track of the track groove; the outer wall of the inner cylinder is also provided with a plurality of V-shaped guide grooves which are arranged at intervals along the circumferential direction, and a positioning part is provided in the guide groove; both end openings of the guide groove are connected with the track groove, so that the guide groove and the track groove are communicated; the track groove includes a track section located between the two end openings of the guide groove;

[0013] When the driving assembly drives the outer cylinder to rotate and drives the trackball to enter the guide groove to the positioning position, the trackball and the outer cylinder are locked and stop rotating;

[0014] When the driving assembly drives the outer cylinder to rotate and drives the track ball to enter the track segment, so that the track ball continues to move in the track groove, the track ball and the outer cylinder can rotate.

[0015] In some embodiments, the positioning portion is formed by a depression of the guide groove in a direction close to another guide groove, so that the positioning portion can firmly lock the trackball, so that the roller blind is firmly locked at the unfolded height.

[0016] In some embodiments, the outer cylinder and the inner cylinder are relatively sleeved on the central axis; along the axial direction of the central axis, the drive assembly and the outer shell are sequentially arranged on one side of the outer cylinder and the inner cylinder, and a retaining spring for limiting the axial separation of the outer cylinder is arranged on the other side; the central axis is provided with two grooves along the axial direction, and a double-legged stabilizing buckle is provided on the side of the inner cylinder close to the retaining spring, the double-legged stabilizing buckle includes a fixing ring, and two extension arms extended from one end of the fixing ring, the two extension arms are respectively adapted in the two grooves, and a retaining portion is provided on the outer wall of the extension arm away from the fixing ring; the inner cylinder is placed between the fixing ring and the retaining portion, and the retaining portion is inverted on the end of the inner cylinder to limit the axial movement of the inner cylinder; at the same time, the inner wall of the fixing ring is provided with a block that can be engaged in the groove, so that the double-legged stabilizing buckle can be firmly engaged on the central axis, so that the inner cylinder can be firmly The inner cylinder is sleeved on the central axis; a snap ring that can be snapped on the outer wall of the fixing ring is provided on the side of the inner cylinder close to the fixing ring, so that the fixing ring can be firmly sleeved on the central axis, making the whole structure more stable; and the axial length of the outer cylinder is greater than the axial length of the inner cylinder, so that the fixing ring and the inner cylinder are covered inside; and the side of the outer cylinder close to the retaining spring is detachably connected to an end cover by a snap-fit ​​method, and the end cover is placed in the retaining spring; A raised outer ring is provided on one end of the outer wall of the outer cylinder close to the outer shell, and a mounting portion which can be connected with the axial end of the rolling curtain shaft is formed on the side of the outer ring facing away from the outer shell to connect the outer cylinder and the rolling curtain shaft. The rotation of the outer cylinder can drive the rotation of the rolling curtain shaft, thereby realizing the unfolding and folding of the rolling curtain; and a plurality of convex ribs connected with the mounting portion are provided on the outer wall of the outer cylinder, and the convex ribs can be abutted against the inner wall of the rolling curtain shaft to improve the connection tightness between the outer cylinder and the rolling curtain shaft.

[0017] By adopting the above scheme, the driving assembly can provide different mileages. When the rolling curtain needs to be unfolded, the driving assembly is driven to drive the outer cylinder to rotate forwardly for a first mileage, so that the track ball can be driven to move along the track groove to a nearby guide groove. When the track ball matches with the positioning position in the guide groove, the outer cylinder is locked. When the rolling curtain needs to be retracted, the driving assembly is driven to drive the outer cylinder to rotate forwardly for a second mileage, so that the track ball can be driven to break away from the positioning position in the guide groove. However, the second mileage of rotation is not enough to drive the track ball into another guide groove. Then, the track ball will enter the track segment under the action of the reverse driving force, so that the track ball continues to move in the track segment. The track ball and the outer cylinder are driven to rotate in the opposite direction to retract the rolling curtain. The first mileage is greater than the second mileage. By arranging a positioning portion in the guide groove, the rolling curtain can be stopped at different heights with precise positioning. When locked, the locking force is strong through the cooperation between the track ball and the positioning portion, which solves the problem that the rolling curtain in the prior art will fall due to its own gravity. By driving the driving component to drive the outer cylinder to rotate intermittently in the forward direction for the first mileage, intermittent unfolding can be achieved, so that the rolling curtain can be unfolded at different heights. The unfolding distance each time can be adjusted by the number of the guide grooves on the inner cylinder. The above structure can meet various needs.

[0018] In some embodiments, the recess is axially arranged on the inner wall of the outer cylinder, and a size of the recess in the axial direction of the outer cylinder is larger than a movement range of the trackball in the axial direction of the inner cylinder.

[0019] By adopting the above scheme, when the outer tube rotates, the track ball moves along the track groove and the guide groove, and the track ball moves axially along the recess on the inner wall of the outer tube, so that the outer tube only performs rotational movement, which can limit the axial movement of the outer tube.

[0020] In some embodiments, the driving assembly includes a driving wheel for driving the outer cylinder to rotate, and a pull rope is provided on the driving wheel; pulling the pull rope can drive the driving wheel to rotate.

[0021] In some embodiments, the pull cord is an elastic pull cord. After the pull cord is pulled downward to drive the driving wheel to rotate and drive the outer cylinder to rotate the first mile or the second mile, the pull cord will retract upward under the action of its own elastic force, so that the pull cord is in a higher position, which can prevent children from pulling it, and is safer; and an opening is provided at the lower end of the outer shell to allow the pull cord to extend out of the outer shell, one end of the pull cord is connected to the driving wheel, and the other end is connected to a pull rod for facilitating pulling the cord, and the pull rod is placed outside the outer shell. When the pull cord retracts, the pull rod will resist the lower end of the outer shell, so that the pull rod is always placed outside the outer shell, making it convenient to pull the pull rod to pull down the pull cord when in use.

[0022] In some embodiments, a receiving cavity for receiving the driving wheel is provided in the outer shell, a hollow mounting shaft coaxially arranged with the central axis is provided in the outer shell, the driving wheel is sleeved on the mounting shaft and can rotate around the mounting shaft; one end of the central shaft passes through the outer shell and is adapted in the mounting shaft, and is locked with the outer shell by a screw to achieve a fixed connection between the central shaft and the outer shell, and the screw is locked at the center of the central shaft and the outer shell to achieve a coaxial arrangement of the central shaft and the mounting shaft, thereby ensuring that the driving wheel and the outer cylinder rotate around the same central axis.

[0023] By adopting the above scheme, by pulling the pull rope, different distances can be pulled, so that the driving wheel drives the outer cylinder to rotate different distances to realize the unfolding or folding of the roller blind. The structure is simple and the operation is convenient; and, a long pull on the pull rope can drive the outer cylinder to rotate a first distance, and a short pull on the pull rope can drive the outer cylinder to rotate a second distance.

[0024] In some embodiments, the driving wheel is disposed in the housing, and a coil spring is connected between the driving wheel and the housing.

[0025] In some embodiments, the coil spring is sleeved on the mounting shaft inside the outer shell, and one end of the coil spring is connected to the mounting shaft, and the other end is connected to the inner wall of the driving wheel. After pulling the pull rope for a long time, the pull rope can drive the driving wheel to rotate forward, and drive the outer cylinder to rotate forward for a first distance. During this process, the coil spring will be deformed under the action of the driving wheel; after pulling the pull rope for a short time, the pull rope can drive the driving wheel to rotate, and drive the outer cylinder to rotate forward for a second distance. At this time, the trackball is not large enough to enter the guide groove, and under the action of the restoring force of the coil spring, the driving wheel will be driven to rotate in the opposite direction, and the driving wheel will drive the outer cylinder to rotate in the opposite direction to achieve the retraction of the roller blind; and when the roller blind is completely retracted, the elastic force of the coil spring is exhausted, and the driving wheel stops rotating, and the outer cylinder stops rotating.

[0026] With the above solution, the setting of the coil spring can provide a restoring force for the reverse rotation of the outer cylinder, so that the roller blind can automatically rise and be recovered after a short pull of the pull rope, which is easy to operate.

[0027] In some embodiments, the drive assembly also includes a first sleeve connected to the drive wheel, and a second sleeve connected to the first sleeve; the second sleeve is abutted against the outer sleeve through a connecting column to drive the sleeve to rotate; wherein the first sleeve and the second sleeve are sleeved on the central axis and can rotate relative to the central axis.

[0028] In some embodiments, the second sleeve is arranged close to the inner sleeve, and the first sleeve is arranged close to the driving wheel; the center axis protrudes outward near the second sleeve to form a supporting portion for abutting against the end of the second sleeve to limit the axial movement of the second sleeve and the first sleeve on the center axis, thereby making the rotation smoother.

[0029] By adopting the above scheme, by pulling the pull rope for a long time, the driving wheel will be driven to rotate, and the driving wheel will drive the first sleeve to rotate, the first sleeve will drive the second sleeve to rotate, and the second sleeve will drive the outer cylinder to rotate, so that the rolling curtain can be lowered, and during the rotation of the outer cylinder, the ball will be driven to enter the positioning position of the guide groove to achieve the positioning of the pull rope at different heights by pulling it for a long time; and after a short pull of the pull rope, the ball is driven to leave the positioning position and enter the track groove; at this time, the restoring force of the coil spring will drive the driving wheel to rotate in the opposite direction, the driving wheel drives the first sleeve to rotate in the opposite direction, the first sleeve drives the second sleeve to rotate in the opposite direction, and the second sleeve drives the outer cylinder to rotate in the opposite direction, thereby realizing the rising and recovery of the rolling curtain.

[0030] In some embodiments, the driving wheel is provided with a plug-in, and correspondingly, the first sleeve is provided with a slot for adapting the plug-in; the first sleeve is arranged between the driving wheel and the second sleeve, a support portion is provided on the side of the first sleeve facing away from the driving wheel, and the second sleeve is provided with a groove capable of accommodating the support portion, the connecting column is placed between the inner wall of the outer shell and the groove, and part of the connecting column is placed in the groove, and the supporting portion can give the connecting column a force so that the connecting column can connect the second sleeve and the outer sleeve.

[0031] By adopting the above scheme, a plurality of the plug-ins are formed on a protrusion on one side of the driving wheel close to the first sleeve, and the first sleeve is provided with a plurality of the slots; the plug-ins and the slots are plugged in one by one to realize the synchronous movement between the driving wheel and the first sleeve; the supporting portion is provided with an inclined end face, and after it is inserted into the slot, the inclined end face can give a force to the connecting column, so that the connecting column partly abuts against the slot wall of the slot, and the top end of the connecting column abuts against the outer cylinder, and the inner wall of the outer cylinder is provided with a recessed portion recessed outward, so that the connecting column abuts against the recessed portion, the supporting portion and the slot, thereby realizing the synchronous movement between the first sleeve and the outer cylinder.

[0032] In some embodiments, a center cylinder is provided on the side of the first sleeve away from the driving wheel, a rotating cylinder is provided inside the center cylinder, a stop torsion spring is provided between the rotating cylinder and the center cylinder, and two ends of the stop torsion spring are respectively connected to the rotating cylinder and the center cylinder.

[0033] By adopting the above scheme, the setting of the retaining torsion spring can realize the synchronous movement between the central tube and the rotating tube. When the first sleeve rotates, it will drive the rotating tube to rotate on the central axis, making the rotation of the first sleeve more stable.

[0034] In some embodiments, the roller blind lifting mechanism further comprises a stopping structure for stopping the rotational movement of the outer cylinder.

[0035] In some embodiments, the stopping structure includes a stopper sleeved on the central axis, and the stopper is fixed relative to the central axis; the outer cylinder is connected with a stop buckle that can cooperate with the stopper for stopping, and a stop plate connected to the stop buckle; the stop plate can approach or move away from the outer cylinder; wherein the rolling curtain is partially covered on the stop plate; after the rolling curtain is fully unfolded, the rolling curtain is separated from the stop plate, the stop plate can move away from the outer cylinder, the stop buckle is driven to move and cooperate with the stopper for stopping, and the outer cylinder stops rotating; when the rolling curtain is covered on the stop plate, the stop plate gives the stop buckle a thrust under the action of the rolling curtain, the stop buckle is separated from the stopper, and the outer cylinder can rotate.

[0036] In some embodiments, the central axis is located on an outer wall on a side of its abutment portion facing away from the second sleeve and protrudes outward to form a plurality of first protrusions arranged at intervals; correspondingly, the inner wall portion of the stopper is protruded to form a plurality of second protrusions arranged at intervals, and the second protrusion is placed between two adjacent first protrusions to limit the rotation range of the stopper to within the range between the two first protrusions; and an annular protrusion is provided on the inner wall of one end of the stopper close to the inner cylinder, the annular protrusion and the second protrusion are arranged at intervals, and a stabilizing torsion spring is sleeved on the central axis in the space between the annular protrusion and the second protrusion; the outer cylinder is provided with a first moving groove and a second moving groove in the same moving direction. The cam is an assembly made of a plurality of movable members, each of which is a plurality of movable members, each of which is a plurality of movable members, each of which is a plurality of movable members. The plurality of movable members are assembled in a plurality of opposite ends of the movable member, and the plurality of movable members are assembled in a plurality of opposite ends of the movable member. The plurality of movable members are assembled in a plurality of opposite ends of the movable member, and the plurality of movable members are assembled in a plurality of opposite ends of the movable member. When the roller blind is on the stop plate, the roller blind applies a pressure to the stop plate so that the limiting part is close to the limiting groove. At this time, the stop buckle and the stop piece are in a separated state and do not contact each other; the outer cylinder will not be restricted and can rotate. At this time, the center of the inner wall arc surface of the stop buckle is concentric with the center of the stop piece; after the roller blind is completely lowered, the roller blind is separated from the stop plate; when the outer cylinder is rotated until the stop plate is rotated to the bottom, the stop plate will move downward along the first moving groove and the second moving groove under the action of the gravity of the stop plate and the stop buckle, so that the stop plate is away from the outer cylinder, and the center of the inner wall arc surface of the stop buckle is concentric with the stop The center of the movable member is eccentric; after continuing to rotate the outer cylinder, the stop portion of the stop buckle will abut against the stop matching portion of the stop member, so that the stop member stops rotating, thereby stopping the outer cylinder from rotating, which can prevent the rolling curtain from continuing to rotate and recover in the same direction after being fully lowered; similarly, under the action of the coil spring, after the outer cylinder is driven to rotate in the opposite direction, the rolling curtain will give the stop plate a force to move it closer to the outer cylinder, and drive the stop buckle to move along the first moving groove and the second moving groove, thereby making the stop portion disengage from the stop matching portion, and the outer cylinder can rotate, and the stabilizing torsion spring will give the stop member a restoring force to return it to its original position.

[0037] The solution adopted by the utility model to solve the above technical problem is a rolling curtain structure, including the rolling curtain lifting mechanism as mentioned above.

[0038] In some embodiments, the rolling curtain structure includes a hollow rolling curtain shaft, which is sleeved on the outer cylinder, and the shaft end of the rolling curtain shaft is connected to the mounting portion on the outer cylinder to achieve a fixed connection between the two, so that the outer cylinder drives the rolling curtain shaft to rotate synchronously; and a rolling curtain is wound on the rolling curtain shaft, and the rolling curtain portion is covered on the outer cylinder.

[0039] (III) Beneficial effects

[0040] Compared with the prior art, the utility model designs a rolling curtain lifting mechanism and a rolling curtain structure.

[0041] (1) The driving assembly in the utility model can provide different mileages. When the rolling curtain needs to be unfolded, the driving assembly is driven to drive the outer cylinder to rotate forwardly for a first mileage, thereby driving the track ball to move along the track groove to a nearby guide groove. When the track ball matches with the positioning position in the guide groove, the outer cylinder is locked. When the rolling curtain needs to be retracted, the driving assembly is driven to drive the outer cylinder to rotate forwardly for a second mileage, thereby driving the track ball to break away from the positioning position in the guide groove. However, the second mileage of rotation is not enough to drive the track ball to enter another guide groove. Then, the track ball will enter the track segment under the action of the reverse driving force, so that the track ball continues to move in the track segment. The track ball and the outer cylinder are driven to rotate in the opposite direction to retract the rolling curtain; the first mileage is greater than the second mileage; and by providing a positioning portion in the guide groove, the rolling curtain can be stopped at different heights, with accurate positioning, and when locked, the locking force is strong through the cooperation between the track ball and the positioning portion, which solves the problem that the rolling curtain in the prior art will fall due to its own gravity; by driving the driving component to drive the outer cylinder to intermittently rotate forward for the first mileage, intermittent unfolding can be achieved, so that the rolling curtain can be unfolded at different heights; and the unfolding distance each time can be adjusted by the number of the guide grooves on the inner cylinder, and the above structure can meet various needs;

[0042] (2) The utility model can provide a restoring force for the reverse rotation of the outer cylinder by setting a coil spring, so that the roller blind can automatically rise and retract after a short pull of the pull rope, and the operation is simple;

[0043] (3) When the roller blind in the utility model is wrapped around the stop plate, the roller blind applies pressure to the stop plate, so that the limiting part is tightly attached to the limit groove. At this time, the stop buckle and the stop member are in a separated state and do not contact each other. Then the outer cylinder will not be restricted and can rotate. At this time, the center of the inner wall arc surface of the stop buckle is concentric with the center of the stop member. After the roller blind is completely lowered, the roller blind is separated from the stop plate. When the outer cylinder rotates until the stop plate rotates to the bottom, the stop plate will move downward along the first moving groove and the second moving groove under the action of the gravity of the stop plate and the stop buckle, so that the stop plate is away from the outer cylinder. Then the inner wall arc surface of the stop buckle The center of the stopper is eccentric to the center of the stop member; after continuing to rotate the outer cylinder, the stop portion of the stop buckle will abut against the stop matching portion of the stop member, so that the stop member stops rotating, thereby stopping the outer cylinder from rotating, which can prevent the rolling curtain from continuing to rotate and recover in the same direction after being fully lowered; similarly, under the action of the coil spring, after the outer cylinder is driven to rotate in the opposite direction, the rolling curtain will give the stop plate a force to make it move closer to the outer cylinder, and drive the stop buckle to move along the first moving groove and the second moving groove, thereby making the stop portion disengage from the stop matching portion, and the outer cylinder can rotate, and the stabilizing torsion spring will give the stop member a restoring force to return it to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is a structural schematic diagram of a roller shutter lifting mechanism of the utility model;

[0046] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0047] Figure 3 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0048] Figure 4 This is an exploded view of a roller shutter lifting mechanism of the utility model;

[0049] Figure 5 It is a structural schematic diagram of the inner cylinder of the utility model;

[0050] Figure 6This is another structural schematic diagram of a roller blind lifting mechanism of the utility model;

[0051] Figure 7 for Figure 6 Sectional view at CC;

[0052] Figure 8 for Figure 7 The enlarged schematic diagram at F in the middle;

[0053] Fig. 9 for Figure 6 Sectional view at DD in the middle;

[0054] Fig.10 for Figure 6 Sectional view at EE;

[0055] Fig.11 This is a structural schematic diagram of a roller shutter lifting mechanism of the utility model (the stop structure is in an unlocked state);

[0056] Fig.12 for Fig.11 Sectional view at GG in the middle;

[0057] Fig.13 for Fig.11 Sectional view at HH in the middle;

[0058] Fig.14 It is a cross-sectional view of a roller blind lifting mechanism of the utility model;

[0059] Fig.15 for Fig.14 The enlarged schematic diagram at I in the middle;

[0060] Fig.16 An exploded view of the drive assembly of the utility model;

[0061] Fig.17 It is a structural schematic diagram of the central axis of the utility model;

[0062] Fig.18 It is a structural schematic diagram of the double-leg stabilizing buckle of the utility model;

[0063] Fig.19 It is a structural schematic diagram of the outer cylinder of the utility model.

[0064] 1 , the first moving groove; 2 , the second moving groove; 3 , the second moving groove; 4 , the second moving groove; 5 , the first moving groove; 6 , the second moving groove; 7 , the second moving groove; 8 , the first moving groove; 9 , the second moving groove; 10 , the first moving groove; 11 , the second moving groove; 12 , the second moving groove; 13 , the second moving groove; 14 , the second moving groove; 15 , the second moving groove; 16 , the second moving groove; 17 , the second moving groove; 18 , the second moving groove; 19 , the second moving groove; 20 , the second moving groove; 21 , the second moving groove; 22 , the second moving groove; 23 , the second moving groove; 24 , the second moving groove; 25 , the second moving groove; 26 , the second moving groove; 27 , the second moving groove; 28 , the second moving groove; 29 , the second moving groove; 30 , the second moving groove; 31 , the second moving groove; 32 , the second moving groove; 33 , the second moving groove; 34 , the second moving groove; 35 , the second moving groove; 36 , the second moving groove; 37 , the second moving groove; 38 , the second moving groove; 39 , the second moving groove; 40 , the second moving groove; 41 , the second moving groove; 42 , the second moving groove; 43 , the second moving groove; 44 , the second moving groove; 45 , the first moving groove; 46 , the second moving groove; 47 , the second moving groove; 48 , the second moving groove; 49 , the second moving groove; 50 , the second moving groove; 51 , the second moving groove; 52 , the second moving groove; A sleeve; 531, a slot; 532, a supporting portion; 532a, an inclined end surface; 542, a central tube; 54, a second sleeve; 541, a slot; 55, a connecting column; 56, a rotating tube; 57, a retaining torsion spring; 600, a trackball; 700, a retaining structure; 70, a retaining member; 701, a second protrusion; 702, an annular protrusion; 703, a retaining mating portion; 71, a retaining buckle; 711, a first moving portion; 712, a second moving portion; 712a, a retaining portion; 72, a retaining sheet; 721, a limiting portion; 73, a stabilizing torsion spring; 800, a retaining spring; 900, a double-foot stabilizing buckle; 90, a fixing ring; 901, a clamping block; 91, an extension arm; 911, a clamping portion. DETAILED DESCRIPTION

[0065] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0066] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0068] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0069] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0070] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0071] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0072] like Figure 1-Figure 19As shown, the utility model provides a rolling curtain lifting mechanism, which is used to be installed on the shaft end of a hollow rolling curtain shaft, on which a rolling curtain is wound, and the rolling curtain lifting mechanism includes a shell 100; a central shaft 200, which is fixedly arranged relative to the shell 100, and one end of the central shaft 200 along its length direction is fixedly connected to the shell 100; an inner cylinder 300, which is sleeved on the central shaft 200, and the inner cylinder 300 is fixedly arranged relative to the central shaft 200; an outer cylinder 400, which The inner cylinder 300 is sleeved on the inner cylinder 300 and connected to the roller blind shaft; the inner cylinder 300 can rotate around its own central axis 200; the driving assembly 500 is connected to the outer cylinder 400 and can drive the outer cylinder 400 to rotate around its own central axis 200; wherein the outer peripheral wall of the inner cylinder 300 is provided with a track groove 30 that surrounds the whole circle, the inner wall of the outer cylinder 400 is provided with a recess 40, and a track ball 6 is provided between the recess 40 and the track groove 30 00; when the outer cylinder 400 rotates, the track ball 600 can be driven to move around the track of the track groove 30; a plurality of V-shaped guide grooves 31 arranged at intervals are also provided on the outer peripheral wall of the inner cylinder 300 along the circumferential direction, and a positioning portion 311 is provided in the guide groove 31; both end openings of the guide groove 31 are connected to the track groove 30, so that the guide groove 31 and the track groove 30 are connected; the track groove 30 includes a track ball 600 located between the two end openings of the guide groove 31 The driving assembly 500 drives the outer cylinder 400 to rotate and drives the trackball 600 to enter the guide groove 31 to the positioning position 311, and the trackball 600 and the outer cylinder 400 are locked and stop rotating; the driving assembly 500 drives the outer cylinder 400 to rotate and drives the trackball 600 to enter the track segment 301, so that the trackball 600 continues to move in the track groove 30, and the trackball 600 and the outer cylinder 400 can rotate. In some embodiments, the positioning position 311 is formed by the guide groove 31 being concave in the direction close to another guide groove 31, so that the positioning position 311 can firmly lock the trackball 600, so that the roller blind is firmly locked at the unfolded height.In some embodiments, the outer cylinder 400 and the inner cylinder 300 are relatively sleeved on the central shaft 200; along the axial direction of the central shaft 200, the driving assembly 500 and the outer shell 100 are sequentially arranged on one side of the outer cylinder 400 and the inner cylinder 300, and a retaining spring 800 for limiting the axial separation of the outer cylinder 400 is arranged on the other side; the central shaft 200 is provided with two grooves 20 along the axial direction, and the central shaft 200 is provided with a double-leg stabilizing buckle 900 on one side of the inner cylinder 300 close to the retaining spring 800, and the double-leg stabilizing buckle 900 includes a fixing ring 90 and a retaining ring 90 formed by the retaining ring 800. Two extension arms 91 are formed by extending from one end of the fixing ring 90, and the two extension arms 91 are respectively adapted in the two grooves 20, and a buckle portion 911 is provided on the outer wall of the extension arm 91 away from the fixing ring 90; the inner cylinder 300 is placed between the fixing ring 90 and the buckle portion 911, and the buckle portion 911 is buckled on the end of the inner cylinder 300 to limit the axial movement of the inner cylinder 300; at the same time, a block 901 that can be snapped into the groove 20 is provided on the inner wall of the fixing ring 90, so that the double-leg stabilizing buckle 900 can be firmly snapped on the central axis 200, so that The inner cylinder 300 can be firmly sleeved on the central shaft 200; a snap ring 32 that can be snapped on the outer wall of the fixing ring 90 is provided on the side of the inner cylinder 300 close to the fixing ring 90, so that the fixing ring 90 can be firmly sleeved on the central shaft 200, making the entire structure more stable; and the axial length of the outer cylinder 400 is greater than the axial length of the inner cylinder 300, so that the fixing ring 90 and the inner cylinder 300 are covered inside; and the side of the outer cylinder 400 close to the retaining ring 800 is detachably connected to the end cover 41 by snapping, and the end cover 41 is placed in the The outer wall of the outer cylinder 400 is provided with a raised outer ring 42 at one end close to the outer shell 100, and the outer ring 42 is formed with a mounting portion 421 which can be connected with the axial end of the rolling curtain shaft on the side away from the outer shell 100 to connect the outer cylinder 400 and the rolling curtain shaft. The rotation of the outer cylinder 400 can drive the rotation of the rolling curtain shaft, thereby realizing the unfolding and folding of the rolling curtain; and a plurality of convex ribs 43 connected with the mounting portion 421 are provided on the outer wall of the outer cylinder 400, and the convex ribs 43 can be abutted against the inner wall of the rolling curtain shaft to improve the connection tightness between the outer cylinder 400 and the rolling curtain shaft.By adopting the above scheme, the driving assembly 500 can provide different mileages. When the rolling curtain needs to be unfolded, the driving assembly 500 is driven to drive the outer cylinder 400 to rotate forwardly for a first mileage, and the track ball 600 can be driven to move along the track groove 30 to a nearby guide groove 31. When the track ball 600 cooperates with the positioning position 311 in the guide groove 31, the outer cylinder 400 is locked. When the rolling curtain needs to be retracted, the driving assembly 500 is driven to drive the outer cylinder 400 to rotate forwardly for a second mileage, and the track ball 600 can be driven to separate from the positioning position 311 in the guide groove 31. However, the second rotation mileage is not enough to drive the track ball 600 to enter another guide groove 31, then the track ball 600 will enter the track segment 301 under the action of the reverse driving force, so that the rolling curtain can be retracted. The trackball 600 continues to move in the reverse direction in the track groove 30; the trackball 600 and the outer cylinder 400 are driven to rotate in the reverse direction to retract the rolling curtain; the first mileage is greater than the second mileage; and by providing a positioning portion 311 in the guide groove 31, the rolling curtain can be stopped at different heights with precise positioning, and when locked, the locking force is strong through the cooperation between the trackball 600 and the positioning portion 311, which solves the problem in the prior art that the rolling curtain will fall due to its own gravity; by driving the driving component 500 to drive the outer cylinder 400 to intermittently rotate forward for the first mileage, intermittent unfolding can be achieved, so that the rolling curtain can be unfolded at different heights; and the unfolding distance each time can be adjusted by the number of the guide grooves 31 on the inner cylinder 300, and the above structure can meet various needs. In some embodiments, the recess 40 is provided on the inner wall of the outer cylinder 400 along the axial direction, and the size of the recess 40 in the axial direction of the outer cylinder 400 is larger than the movement range of the trackball 600 in the axial direction of the inner cylinder 300. With the above solution, when the outer cylinder 400 rotates, the trackball 600 moves along the track groove 30 and the guide groove 31, and the trackball 600 moves axially along the recess 40 on the inner wall of the outer cylinder 400, so that the outer cylinder 400 only performs rotational movement, and the axial movement of the outer cylinder 400 can be limited.

[0073] In some embodiments, the driving assembly 500 includes a driving wheel 50 for driving the outer cylinder 400 to rotate, and a pull rope 51 is sleeved on the driving wheel 50; pulling the pull rope 51 can drive the driving wheel 50 to rotate. In some embodiments, the pull cord 51 is an elastic pull cord 51. After the pull cord 51 is pulled downward to drive the driving wheel 50 to rotate and drive the outer cylinder 400 to rotate the first mile or the second mile, the pull cord 51 will retract upward under the action of its own elastic force, so that the pull cord 51 is in a higher position, which can prevent children from pulling it and is safer; and an opening is provided at the lower end of the outer shell 100 so that the pull cord 51 can extend out of the outer shell 100, one end of the pull cord 51 is connected to the driving wheel 50, and the other end is connected to a pull rod 511 for facilitating the pulling of the pull cord 51, and the pull rod 511 is placed outside the outer shell 100. When the pull cord 51 retracts, the pull rod 511 will abut against the lower end of the outer shell 100, so that the pull rod 511 is always placed outside the outer shell 100, so that the pull rod 511 can be pulled down to facilitate use when in use. In some embodiments, a receiving cavity 10 for accommodating the driving wheel 50 is provided in the outer shell 100, and a hollow mounting shaft 11 coaxially arranged with the central axis 200 is provided in the outer shell 100, and the driving wheel 50 is sleeved on the mounting shaft 11 and can rotate around the mounting shaft 11; one end of the central axis 200 passes through the outer shell 100 and is adapted in the mounting shaft 11, and is locked together with the outer shell 100 by a screw to achieve a fixed connection between the central axis 200 and the outer shell 100, and the screw is locked at the center of the central axis 200 and the outer shell 100 to achieve the coaxial arrangement of the central axis 200 and the mounting shaft 11, ensuring that the driving wheel 50 and the outer cylinder 400 rotate around the same central axis 200 line. By adopting the above scheme, by pulling the pull cord 51, different distances can be pulled, so that the driving wheel 50 drives the outer cylinder 400 to rotate different distances to achieve the deployment or folding of the roller blind, the structure is simple and the operation is convenient; and, by pulling the pull cord 51 for a long time, the outer cylinder 400 can be driven to rotate a first distance, and by pulling the pull cord 51 for a short time, the outer cylinder 400 can be driven to rotate a second distance. In some embodiments, the driving wheel 50 is disposed in the housing 100, and a coil spring 52 is connected between the driving wheel 50 and the housing 100.In some embodiments, the coil spring 52 is sleeved on the mounting shaft 11 in the housing 100, and one end of the coil spring 52 is connected to the mounting shaft 11, and the other end is connected to the inner wall of the driving wheel 50. After the pull rope 51 is pulled long, the pull rope 51 can drive the driving wheel 50 to rotate forward, and drive the outer cylinder 400 to rotate forward for a first mile. In this process, the coil spring 52 will be deformed under the force of the driving wheel 50; after the pull rope 51 is pulled short, the pull rope 51 can drive the driving wheel 50 to rotate forward. 51 can drive the driving wheel 50 to rotate, and drive the outer cylinder 400 to rotate forwardly for the second mileage. At this time, the trackball 600 is not enough to enter the guide groove 31, and under the action of the restoring force of the coil spring 52, the driving wheel 50 will be driven to rotate in the opposite direction, and the driving wheel 50 will drive the outer cylinder 400 to rotate in the opposite direction to achieve the retraction of the rolling curtain; and when the rolling curtain is completely retracted, the elastic force of the coil spring 52 is exhausted, and the driving wheel 50 stops rotating, and the outer cylinder 400 stops rotating. With the above scheme, the setting of the coil spring 52 can provide a restoring force for the reverse rotation of the outer cylinder 400, so that the rolling curtain can automatically rise and be recovered after the pull rope 51 is pulled short, and the operation is simple.

[0074] In some embodiments, the driving assembly 500 further includes a first sleeve 53 connected to the driving wheel 50, and a second sleeve 54 connected to the first sleeve 53; the second sleeve 54 abuts against the outer cylinder 400 through a connecting column 55 to drive the sleeve to rotate; wherein the first sleeve 53 and the second sleeve 54 are sleeved on the central shaft 200 and can rotate relative to the central shaft 200. In some embodiments, the second sleeve 54 is arranged close to the inner cylinder 300, and the first sleeve 53 is arranged close to the driving wheel 50; the central shaft 200 is protruded outwardly near the second sleeve 54 to form an abutting portion 21 for abutting against the end of the second sleeve 54, so as to limit the axial movement of the second sleeve 54 and the first sleeve 53 on the central shaft 200, thereby making the rotation more stable. By adopting the above scheme, by pulling the pull rope 51 for a long time, the driving wheel 50 will be driven to rotate, and the driving wheel 50 will drive the first sleeve 53 to rotate, the first sleeve 53 will drive the second sleeve 54 to rotate, and the second sleeve 54 will drive the outer cylinder 400 to rotate, so that the rolling curtain can be lowered, and during the rotation of the outer cylinder 400, the ball will be driven to enter the positioning position 311 of the guide groove 31, so that the pull rope 51 can be positioned at different heights by pulling for a long time; and after the pull rope 51 is pulled for a short time, the ball is driven to leave the positioning position 311 and enter the track groove 30; at this time, the restoring force of the coil spring 52 will drive the driving wheel 50 to rotate in the opposite direction, the driving wheel 50 drives the first sleeve 53 to rotate in the opposite direction, the first sleeve 53 drives the second sleeve 54 to rotate in the opposite direction, and the second sleeve 54 drives the outer cylinder 400 to rotate in the opposite direction, so as to realize the rising and recovery of the rolling curtain. In some embodiments, the driving wheel 50 is provided with a plug-in 501, and correspondingly, the first sleeve 53 is provided with a slot 531 for adapting the plug-in 501; the first sleeve 53 is arranged between the driving wheel 50 and the second sleeve 54, and a support portion 532 is provided on the side of the first sleeve 53 facing away from the driving wheel 50, and the second sleeve 54 is provided with a groove 541 capable of accommodating the support portion 532, the connecting column 55 is placed between the inner wall of the outer shell 100 and the groove 541, and part of the connecting column 55 is placed in the groove 541, and the supporting portion 532 can give a force to the connecting column 55 so that the connecting column 55 can connect the second sleeve 54 and the outer cylinder 400.By adopting the above scheme, a plurality of the plug-ins 501 are formed on a protrusion on one side of the driving wheel 50 close to the first sleeve 53, and the first sleeve 53 is provided with a plurality of the slots 531; the plug-ins 501 and the slots 531 are plugged in one by one to realize the synchronous movement between the driving wheel 50 and the first sleeve 53; the support portion 532 is provided with an inclined end surface 532a, and after it is inserted into the slot 541, the inclined end surface 532a can give a force to the connecting column 55, so that the connecting column 55 partially abuts against the slot wall of the slot 541, and the top of the connecting column 55 abuts against the outer cylinder 400, and the inner wall of the outer cylinder 400 is provided with a recessed portion 44 recessed outward, so that the connecting column 55 abuts against the recessed portion 44, the support portion 532 and the slot 541, thereby realizing the synchronous movement between the first sleeve 53 and the outer cylinder 400. In some embodiments, a central tube 542 is disposed on the side of the first sleeve 53 away from the driving wheel 50, a rotating tube 56 is disposed in the central tube 542, a stop torsion spring 57 is disposed between the rotating tube 56 and the central tube 542, and the two ends of the stop torsion spring 57 are respectively connected to the rotating tube 56 and the central tube 542. With the above solution, the setting of the stop torsion spring 57 can realize the synchronous movement between the central tube 542 and the rotating tube 56, so that when the first sleeve 53 rotates, it will drive the rotating tube 56 to rotate on the central axis 200, so that the rotation of the first sleeve 53 is more stable.

[0075] In some embodiments, the roller blind lifting mechanism further includes a stopping structure 700 for stopping the rotational movement of the outer cylinder 400 . In some embodiments, the stopping structure 700 includes a stopping member 70 sleeved on the central axis 200, and the stopping member 70 is fixedly arranged relative to the central axis 200; the outer cylinder 400 is connected with a stopping buckle 71 that can cooperate with the stopping member 70 for stopping, and a stopping plate 72 connected to the stopping buckle 71; the stopping plate 72 can approach or move away from the outer cylinder 400; wherein, the rolling curtain is partially covered on the stopping plate 72; after the rolling curtain is fully unfolded, the rolling curtain is separated from the stopping plate 72, the stopping plate 72 can move away from the outer cylinder 400, the stopping buckle 71 is driven to move and cooperate with the stopping member 70 for stopping, and the outer cylinder 400 stops rotating; when the rolling curtain is covered on the stopping plate 72, the stopping plate 72 gives the stopping buckle 71 a thrust under the action of the rolling curtain, the stopping buckle 71 is separated from the stopping member 70, and the outer cylinder 400 can rotate. In some embodiments, the outer wall of the central axis 200 located on the side of the abutment portion 21 away from the second sleeve 54 is protruded outward to form a plurality of first protrusions 22 arranged at intervals; correspondingly, the inner wall portion of the stopper 70 is protruded to form a plurality of second protrusions 701 arranged at intervals, and the second protrusion 701 is placed between two adjacent first protrusions 22 to limit the rotation range of the stopper 70 to the range between the two first protrusions 22; and, an annular protrusion 702 is provided on the inner wall of the end of the stopper 70 close to the inner cylinder 300, the annular protrusion 702 and the second protrusion 701 are arranged at intervals, and a stabilizing torsion spring 73 is sleeved on the central axis 200 in the space between the annular protrusion 702 and the second protrusion 701; the outer cylinder 400 is provided with a first moving groove 404 in the same moving direction. 5 and a second movable groove 46, and the first movable groove 45 and the second movable groove 46 are located at different heights, and the second movable groove 46 is arranged close to the stopper 70; the stop buckle 71 includes a first movable portion 711 respectively arranged in the first movable groove 45 and a second movable portion 712 arranged in the second movable groove 46, the first movable portion 711 is connected to the stopper 72 by snapping, and the stopper 72 includes a limiting portion 721 arranged outside the outer cylinder 400; the outer cylinder 400 includes a limiting groove 47 for accommodating the limiting portion 721; a stopper 712a protruding inwardly is arranged on the part of the second movable portion 712 close to the inner part of the outer cylinder 400, and correspondingly, a stopper matching portion 703 that can abut against the stopper 712a to achieve stopping is formed on the outer wall of the stopper 70;When the locking cam 77 is in the unlocked position, the locking cam 77 will be in the unlocked position, and the locking cam 77 will be in the unlocked position when the locking cam 77 is unlocked. The outer cylinder 400 is eccentric to the center of the stopper 70; after the outer cylinder 400 continues to rotate, the stopper 712a of the stopper buckle 71 will abut against the stopper matching portion 703 of the stopper 70, so that the stopper 70 stops rotating, thereby stopping the outer cylinder 400 from rotating, and preventing the rolling curtain from continuing to rotate and recover in the same direction after being fully lowered; similarly, under the action of the coil spring 52, after the outer cylinder 400 is driven to rotate in the opposite direction, the rolling curtain will give the stopper 72 a force to move closer to the outer cylinder 400, and drive the stopper buckle 71 to move along the first moving groove 45 and the second moving groove 46, so that the stopper 712a is disengaged from the stopper matching portion 703, and the outer cylinder 400 can rotate, and the stable torsion spring 73 will give the stopper 70 a restoring force to return it to its original position. ;

[0076] Based on the same inventive concept, the embodiments of this specification also provide a rolling curtain structure, including the rolling curtain lifting mechanism as described above. In some embodiments, the rolling curtain structure includes a hollow rolling curtain shaft (not shown in the figure), the rolling curtain shaft is sleeved on the outer cylinder 400, and the shaft end of the rolling curtain shaft is connected to the mounting portion 421 on the outer cylinder 400 to achieve a fixed connection between the two, so that the outer cylinder 400 drives the rolling curtain shaft to rotate synchronously; and a rolling curtain (not shown in the figure) is wound on the rolling curtain shaft, and the rolling curtain is partially covered on the outer cylinder 400.

[0077] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0078] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A roller blind lifting mechanism, used to be installed on the shaft end of a hollow roller blind shaft, on which a roller blind is wound, characterized in that: The roller blind lifting mechanism comprises Housing (100); A central axis (200) is fixedly arranged relative to the outer shell (100), and one end of the central axis (200) along its length direction is fixedly connected to the outer shell (100); An inner cylinder (300) is sleeved on the central axis (200), and the inner cylinder (300) is fixedly arranged relative to the central axis (200); The outer cylinder (400) is sleeved on the inner cylinder (300) and connected to the roller blind shaft; and the inner cylinder (300) can rotate around its own central axis (200); A driving assembly (500), which is connected to the outer cylinder (400) and is capable of driving the outer cylinder (400) to rotate around its own central axis (200); The outer wall of the inner cylinder (300) is provided with a track groove (30) which surrounds the inner cylinder (30), the inner wall of the outer cylinder (400) is provided with a recess (40), and a track ball (600) is provided between the recess (40) and the track groove (30); when the outer cylinder (400) rotates, the track ball (600) can be driven to move along the track of the track groove (30); the outer wall of the inner cylinder (300) is also provided with a plurality of V-shaped guide grooves (31) arranged at intervals along the circumferential direction, and a positioning portion (311) is provided in the guide groove (31); both end openings of the guide groove (31) are connected to the track groove (30), so that the guide groove (31) and the track groove (30) are communicated; the track groove (30) includes a track section (301) located between the two end openings of the guide groove (31); When the driving assembly (500) drives the outer cylinder (400) to rotate and drives the trackball (600) to enter the guide groove (31) to the positioning position (311), the trackball (600) and the outer cylinder (400) are locked and stop rotating; The driving assembly (500) drives the outer cylinder (400) to rotate and drives the track ball (600) to enter the track segment (301), so that the track ball (600) continues to move in the track groove (30), and the track ball (600) and the outer cylinder (400) can rotate.

2. The roller blind lifting mechanism according to claim 1, characterized in that: The recess (40) is axially arranged on the inner wall of the outer cylinder (400), and the size of the recess (40) in the axial direction of the outer cylinder (400) is larger than the movement range of the trackball (600) in the axial direction of the inner cylinder (300).

3. The roller blind lifting mechanism according to claim 1, characterized in that: The driving assembly (500) comprises a driving wheel (50) for driving the outer cylinder (400) to rotate, and a pull rope (51) is sleeved on the driving wheel (50); pulling the pull rope (51) can drive the driving wheel (50) to rotate.

4. The roller blind lifting mechanism according to claim 3, characterized in that: The driving wheel (50) is disposed in the housing (100), and a coil spring (52) is connected between the driving wheel (50) and the housing (100).

5. The roller blind lifting mechanism according to claim 3, characterized in that: The driving assembly (500) further comprises a first sleeve (53) connected to the driving wheel (50), and a second sleeve (54) connected to the first sleeve (53); the second sleeve (54) abuts against the outer cylinder (400) via a connecting column (55) to drive the sleeve to rotate; wherein the first sleeve (53) and the second sleeve (54) are sleeved on the central axis (200) and are rotatable relative to the central axis (200).

6. The roller blind lifting mechanism according to claim 5, characterized in that: The driving wheel (50) is provided with a plug-in (501), and correspondingly, the first sleeve (53) is provided with a slot (531) for adapting the plug-in (501); the first sleeve (53) is arranged between the driving wheel (50) and the second sleeve (54); a support portion (532) is provided on the side of the first sleeve (53) facing away from the driving wheel (50); the second sleeve (54) is provided with a groove (541) capable of accommodating the support portion (532); the connecting column (55) is arranged between the inner wall of the outer shell (100) and the groove (541), and part of the connecting column (55) is arranged in the groove (541); the supporting portion (532) can give a force to the connecting column (55) so that the connecting column (55) can connect the second sleeve (54) and the outer cylinder (400).

7. The roller blind lifting mechanism according to claim 5, characterized in that: A center tube (542) is arranged on the side of the first sleeve (53) facing away from the driving wheel (50), a rotating tube (56) is arranged inside the center tube (542), a stop torsion spring (57) is arranged between the rotating tube (56) and the center tube (542), and two ends of the stop torsion spring (57) are respectively connected to the rotating tube (56) and the center tube (542).

8. The roller blind lifting mechanism according to claim 1, characterized in that: The roller blind lifting mechanism further comprises a stopping structure (700) for stopping the rotational movement of the outer cylinder (400).

9. The roller blind lifting mechanism according to claim 8, characterized in that: The stopping structure (700) comprises a stopping member (70) sleeved on the central axis (200), and the stopping member (70) is fixedly arranged relative to the central axis (200); the outer cylinder (400) is connected with a stopping buckle (71) capable of cooperating with the stopping member (70) for stopping, and a stopping plate (72) connected to the stopping buckle (71); the stopping plate (72) can be close to or away from the outer cylinder (400); wherein the rolling curtain part is covered on the stopping plate (72); After the rolling curtain is fully unfolded, the rolling curtain is separated from the stop plate (72), the stop plate (72) can be separated from the outer cylinder (400), the stop buckle (71) is driven to move and cooperate with the stop member (70) to stop, and the outer cylinder (400) stops rotating; when the rolling curtain is wrapped around the stop plate (72), the stop plate (72) gives the stop buckle (71) a thrust under the action of the rolling curtain, and the stop buckle (71) is separated from the stop member (70), and the outer cylinder (400) can rotate.

10. Roller blind structure, characterized in that: It comprises a roller blind lifting mechanism as described in any one of claims 1 to 9 above.

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