Roller shutter

Abstract

The roller shutter is characterized in that a shutter material is wound on a reel, and one side of the free end of the shutter material is connected with a length limiting positioning piece; the tensioning device comprises a one-way wheel assembly and a transmission part, one end of the reel is connected with the one-way wheel assembly through the tensioning device, so that the reel and the one-way wheel assembly rotate in the same direction, one end of the transmission part surrounds the one-way wheel assembly, and the transmission part is annular and surrounds the one-way wheel assembly and the positioning roller; the transmission part is connected with the length limiting positioning part, the curtain material is connected with the transmission part through the length limiting positioning part, and in the unwinding or winding process of the curtain material, after the curtain material is stressed, the tension device is driven to move through the length limiting positioning part, and then the reel moves along with the tension device. In the winding and unwinding process, the curtain material can be kept tensioned, flat and free of drooping, and the device can be widely applied to various scenes where the roller shutter is installed on the top face, the inclined face and the vertical face and needs to be inversely installed.

Description

Technical Field

[0001] The invention belongs to the field of rolling blinds and relates to a rolling blind. Background Art

[0002] As people's life concepts are gradually changing, the demand for sunshade products is also increasing. Electric ceiling curtains are one of the widely used products. Most of the ceiling curtains on the market are installed horizontally. Since they cannot be closed by gravity, most of them are rolled up by telescopic belt structures on both sides. When the curtains are rolled up, the telescopic belts are under stress for a long time and are easily fatigued, which seriously affects the service life of the ceiling curtains. In addition, there are two types of ceiling curtain products on the market: tension springs and gas springs. Their characteristics are that the tension springs and gas springs are installed in the traction rod. The length of the tension springs and gas springs is limited by the length of the traction rod, so the compensation distance cannot exceed the length of the traction rod. And there is also the problem of spring fatigue. Summary of the invention

[0003] In order to solve the problem that the curtain material sags, is uneven, and is not tensioned after and during the unrolling of the rolling curtain, the present invention discloses a rolling curtain, including a reel, a curtain material, a length-limiting positioning member, and a tensioning device, wherein the fixed end of the curtain material is arranged on the reel, the free end of the curtain material is provided with a bottom rail, and the length-limiting positioning member is used to limit the unrolling length of the curtain material, and includes a positioning roller;

[0004] The tensioning device comprises a one-way wheel assembly and a transmission member, one end of the reel is connected to the one-way wheel assembly through the tensioning device, so that the reel and the one-way wheel assembly rotate in the same direction, and the transmission member is annular and surrounds the one-way wheel assembly and the positioning roller;

[0005] The transmission member is connected to the length-limiting positioning member, and the curtain material is connected to the transmission member via the length-limiting positioning member. During the unwinding or rewinding process of the curtain material, the curtain material, the length-limiting positioning member, and the transmission member move synchronously.

[0006] Preferably, the tensioning device further comprises a synchronization device assembly drivingly connected to the reel; the synchronization device assembly comprises a housing, a friction assembly and a rotating shaft, and the friction assembly and the rotating shaft are both arranged in the housing.

[0007] The friction assembly includes a first friction ring and a second friction ring; the rotating shaft passes through the first friction ring and the second friction ring; a second linkage component matching the outer contour of the rotating shaft is arranged on the inner ring contour of the second friction ring, so that the second friction ring rotates synchronously with the rotating shaft; the first friction ring is close to the second friction ring, and the first friction ring and the second friction ring are driven to rotate in the same direction through the friction force between the two; a first linkage component matching the inner wall of the outer shell is arranged on the outer ring contour of the first friction ring, so that the outer shell rotates synchronously with the first friction ring; the synchronization device assembly is connected to the transmission member through the one-way wheel assembly.

[0008] Preferably, the housing and the reel are integrally formed.

[0009] Preferably, the synchronizer assembly further comprises an adjusting assembly; the adjusting assembly adjusts the friction force between the first friction ring and the second friction ring by applying pressure to the friction assembly.

[0010] Preferably, the adjustment component comprises an elastic member; the elastic member controls the pressure applied to the friction component by the degree of elastic deformation, thereby adjusting the friction force between the first friction ring and the second friction ring.

[0011] Preferably, the adjustment assembly further includes a first pressure-applying member; the elastic member transmits pressure generated by elastic deformation to the friction assembly via the first pressure-applying member.

[0012] Preferably, an outer contour of the first pressure member matches an outer contour of the first friction ring, so that the first pressure member can rotate with the housing.

[0013] Preferably, the first pressure member is annular; the inner ring profile of the first pressure member is the same as the inner ring profile of the second friction ring, so that the rotating shaft can rotate with the first pressure member.

[0014] Preferably, the adjustment assembly further includes a second pressure member; the first pressure member, the elastic member and the second pressure member are arranged in sequence.

[0015] Preferably, the first pressure member and the second pressure member are ring-shaped;

[0016] The outer contour of the first pressure member and the outer contour of the second pressure member are both the same as the outer contour of the first friction ring, so that the first pressure member and the second pressure member can rotate with the housing; or

[0017] The inner contours of the first pressure member and the second pressure member are both the same as the inner contour of the second friction ring, so that the rotating shaft can rotate with the first pressure member and the second pressure member.

[0018] Preferably, the elastic deformation degree of the elastic member is adjusted by a fastener; the fastener includes a push rod; the extension and retraction degree of the push rod can change the elastic deformation force exerted on the elastic member, thereby adjusting the elastic deformation degree of the elastic member.

[0019] Preferably, the adjustment assembly further includes a first pressure member and a second pressure member; the first pressure member, the elastic member and the second pressure member are arranged in sequence; and the fastener is arranged on the first pressure member and / or the second pressure member.

[0020] Preferably, the adjustment assembly and the friction assembly are arranged in a space enclosed by the side wall of the outer shell and the end plate of the outer shell; the push rod passes through the end plate of the outer shell; the first end of the push rod supports the adjustment assembly, and the second end of the push rod is exposed to the outside of the end plate and is provided with a fixing member to fix the push rod.

[0021] Preferably, the first linking component is a protrusion extending outward, and a recess matching the first linking component is arranged at a corresponding position of the inner wall of the shell; or the first linking component is a recess retracted inward, and a protrusion matching the first linking component is arranged at a corresponding position of the inner wall of the shell; or the first linking component includes both a protrusion extending outward and a recess retracted inward, and the inner wall of the shell is provided with a recess matching the protrusion extending outward at a position corresponding to the protrusion extending outward, and the inner wall of the shell is provided with a protrusion matching the protrusion extending outward at a position corresponding to the inwardly retracted recess.

[0022] Preferably, the outer contour of the first friction ring matches the inner wall contour of the cross section of the housing, so that the first friction ring can rotate with the housing; the first linkage component is a part of the outer contour of the first friction ring that makes the outer ring contour of the first friction ring become matched with the inner wall contour of the cross section of the housing.

[0023] Preferably, the second linking component is a protrusion extending inwardly, and a depression matching the second linking component is arranged at a corresponding position of the outer contour of the rotating shaft; or the second linking component is a depression retracted into the ring, and a protrusion matching the second linking component is arranged at a corresponding position of the outer contour of the rotating shaft; or the second linking component includes both a protrusion extending inwardly and a depression retracted into the ring, and the outer contour of the rotating shaft is provided with a depression matching the protrusion extending inwardly at a position corresponding to the protrusion extending inwardly, and the outer contour of the rotating shaft is provided with a protrusion matching the recess retracted into the ring at a position corresponding to the recess retracted into the ring.

[0024] Preferably, the inner contour of the second friction ring matches the outer contour of the cross section of the rotating shaft, so that the rotating shaft can rotate with the second friction ring; the second linkage component is a part of the inner contour of the second friction ring that makes the inner ring contour of the second friction ring become matched with the outer contour of the cross section of the rotating shaft.

[0025] Preferably, the number of the first friction ring or the second friction ring is greater than or equal to 1, and the transmission effect of the housing to the rotating shaft is adjusted by changing the friction area by adjusting the arrangement of the first friction ring and the second friction ring.

[0026] Preferably, the one-way wheel assembly includes the transmission wheel, a pawl and a pawl support shaft; the inner ring of the transmission wheel is a ratchet gear; the ratchet teeth of the ratchet gear are arranged in a circle on the inner circumferential surface of the ratchet gear in an inclined direction in the same rotation direction, the front end of the pawl is placed in the ratchet teeth of the ratchet gear, and the root of the pawl is arranged on the outer circumferential surface of the pawl support shaft; the one-way wheel assembly is configured: when the rotation direction of the pawl support shaft is the same as the inclination direction of the ratchet teeth of the ratchet gear, the pawl is engaged in the ratchet teeth of the ratchet gear, pushing the ratchet gear and the pawl support shaft to rotate synchronously and the two have the same rotation direction; when the rotation direction of the pawl support shaft is opposite to the inclination direction of the ratchet teeth of the ratchet gear, the pawl slips in the ratchet teeth of the ratchet gear, and the ratchet gear does not rotate synchronously with the pawl support shaft; the pawl support shaft is transmission connected to the reel or the pawl support shaft and the reel are integrally formed.

[0027] In some specific embodiments, in a right side view of the ratchet gear, the ratchet teeth of the ratchet gear are arranged around the inner circumferential surface of the ratchet gear in a clockwise tilt.

[0028] In some specific embodiments, in a right side view of the ratchet gear, the ratchet teeth of the ratchet gear are arranged counterclockwise and tilted around the inner circumferential surface of the ratchet gear.

[0029] In some embodiments, the inclination angle of each ratchet tooth is the same.

[0030] In some embodiments, the inclination angles of some or all of the ratchet teeth are different.

[0031] In some specific embodiments, a limiting groove is provided on the outer circumferential surface of the pawl support shaft; the limiting groove is connected to the pawl through a support member; the limiting groove is used to limit the rotation range of the pawl around the support member, so as to ensure that the pawl can rotate to facilitate slipping when the pawl slips in the ratchet teeth of the ratchet gear, and ensure that the pawl does not rotate around the support member when the pawl is engaged in the ratchet teeth of the ratchet gear to push the ratchet gear and the pawl support shaft to rotate synchronously, so as to facilitate pushing the ratchet gear.

[0032] In some specific embodiments, the transmission member is a transmission belt, and the ratchet gear is a ratchet pulley that can cooperate with the transmission belt for transmission.

[0033] In some specific embodiments, the transmission member is a transmission wire, and the ratchet gear is a ratchet wire wheel that can cooperate with the transmission wire for transmission.

[0034] In some specific embodiments, the transmission member is a transmission chain, and the ratchet gear is a ratchet sprocket that can cooperate with the transmission chain. The outer contour of the ratchet sprocket is provided with convex teeth that can be inserted into the gap between the transmission chains, thereby ensuring that the transmission chain and the ratchet sprocket are synchronously driven without slipping.

[0035] Preferably, the one-way wheel assembly includes a transmission wheel and a gear shift assembly; the gear shift assembly includes n gear sets, which are the first gear set...the nth gear set in sequence, n>1; the one-way wheel assembly is configured such that: the reel is transmission-connected with the gear set, the gear set is transmission-connected with the transmission wheel, and the rotation speed of the reel causes the rotation speed of the transmission wheel to change after passing through the gear sets of different gears. Further, the rotating shaft is transmission-connected with the gear set, the gear set is transmission-connected with the transmission wheel, and the rotation speed of the rotating shaft causes the rotation speed of the transmission wheel to change after passing through the gear sets of different gears. The ellipsis here indicates that the number increases from 1 to n in sequence. For example, when n=4, "the first gear set...the nth gear set in sequence" means the first gear set, the second gear set, the third gear set, and the fourth gear set in sequence. Thus, when n takes different values ​​greater than 1, n can be deduced by analogy, and n is equal to 2, 3, 4, 5, 6, 7, 8 or 9.

[0036] In some specific implementation schemes, the transmission wheels include a 1st gear transmission wheel... an mth gear transmission wheel with decreasing radius, m>1; the gear shifting between the gear transmission wheels is performed by a mountain bike shifting method, an electromagnet method, or a servo method, so that the transmission member can be connected to the transmission wheels of different radii. The ellipsis here indicates increasing from 1 to m. For example, when m=4, "the 1st gear transmission wheel... the mth gear transmission wheel" means the 1st gear transmission wheel, the 2nd gear transmission wheel, the 3rd gear transmission wheel, and the 4th gear transmission wheel. Therefore, when m takes different values ​​greater than 1, the same can be applied.

[0037] In some specific embodiments, m is selected from 2-9.

[0038] Preferably, the transmission wheel is annular, and n rows of gear tracks are arranged on its inner ring to match the n-gear set; the gear set includes at least two gears connected in transmission, namely a driving wheel and a driven wheel; the driving wheel is connected in transmission with the reel, and the driven wheel is arranged on the gear track; the diameters of the n rows of gear tracks are different and / or the diameters of the driving wheels in the n-gear set are different; the gear set is shifted on the gear track by a mountain bike shifting method, an electromagnet method or a steering gear method. Further, the driving wheel is connected in transmission with the rotating shaft. The transmission member is a transmission belt, and the transmission wheel is a transmission belt pulley that can cooperate with the transmission belt for transmission. In some examples, the transmission member is a transmission wire, and the transmission wheel is a transmission wire wheel that can cooperate with the transmission wire for transmission.

[0039] Preferably, the one-way wheel assembly comprises a plurality of coaxially arranged sprockets of different diameters, each sprocket being connected to the reel, and the transmission member being a chain. Further, the chain is a transmission chain, and the sprocket is a transmission sprocket that can cooperate with the transmission chain for transmission. The outer contour of the transmission sprocket is provided with convex teeth that can be inserted into the gap between the transmission chains, thereby ensuring that the transmission chain and the transmission sprocket are synchronously transmitted without slipping.

[0040] Preferably, the one-way wheel assembly further comprises an auxiliary wheel, wherein the auxiliary wheel is arranged below the transmission wheel, and after the transmission member surrounds the transmission wheel, it also surrounds the auxiliary wheel, and the transmission wheel drives the auxiliary wheel to rotate.

[0041] Preferably, when the curtain material is unrolled and reeled, the displacement length of the transmission member is balanced to be consistent with the displacement length of the curtain material through the friction between the transmission member and the transmission wheel, and / or the friction between the reel and the transmission wheel, and / or the friction between the reel and the pawl support shaft.

[0042] Preferably, the rolling curtain also includes a power source, which is connected to the positioning roller and drives the positioning roller to rotate. After the positioning roller rotates, it drives the transmission member to rotate. The length limiting positioning member follows the transmission member, and the transmission member drives the one-way wheel assembly to rotate. The one-way wheel assembly drives the reel to rotate, thereby realizing the unwinding and / or winding of the curtain material.

[0043] Preferably, the roller blind also includes a power source, which is arranged in the reel and drives the reel to rotate, the reel drives the one-way wheel assembly to rotate, the one-way wheel assembly drives the transmission member to rotate, and the length limiting positioning member rotates with the transmission member to achieve unwinding and / or winding of the curtain material.

[0044] Preferably, there is at least one of the length-limiting positioning member and the tensioning device.

[0045] Preferably, the roller blind further comprises a rigid transmission assembly, the rigid transmission assembly comprises a transmission rigid belt, a reversing pulley and a steering pulley, the two ends of the transmission rigid belt are fixedly connected to the two ends of the bottom rail through a length-limiting positioning member, the transmission rigid belt extends along the outer edge of the transmission member, the reel and the bottom rail, and is turned through the steering pulley at both ends of the reel, and is reversed at one end of the bottom rail through the reversing pulley. 。

[0046] In some specific embodiments, the curtain material is connected to the transmission member via a bottom rail disposed at the bottom of the curtain material.

[0047] In some specific embodiments, the cross-sectional outer contour of the shaft is an octagon, triangle, square, rectangle, hexagon, heptagon, ellipse, trapezoid, pentagon, rhombus, semicircle or irregular shape, etc. Further, the cross-sectional outer contour of the shaft is a regular octagon.

[0048] In some specific embodiments, there are two length-limiting positioning members, which are symmetrically arranged; there are two tensioning devices, which are symmetrically arranged. Further, there are two positioning rollers, which are symmetrically arranged; there are two one-way wheel assemblies, which are symmetrically arranged; there are two transmission members, which are symmetrically arranged; there are two synchronization device assemblies, which are symmetrically arranged; and there are two side rails, which are symmetrically arranged.

[0049] In some specific embodiments, the rolling curtain also includes a power source, which is connected to the positioning roller and drives the positioning roller to rotate. After the positioning roller rotates, it drives the transmission member to rotate, and the length limiting positioning member rotates with the transmission member. The transmission member drives the one-way wheel assembly to rotate, and the one-way wheel assembly drives the reel to rotate, thereby realizing the unwinding and / or winding of the curtain material.

[0050] In some specific embodiments, the roller blind also includes a power source, which is disposed in the reel and drives the reel to rotate, the reel drives the one-way wheel assembly to rotate, the one-way wheel assembly drives the transmission member to rotate, and the length limiting positioning member rotates with the transmission member to achieve unwinding and / or winding of the blind material.

[0051] In some specific embodiments, the one-way wheel assembly includes a transmission wheel and a gear shift assembly; the gear shift assembly includes n gear sets, which are the 1st gear set...the nth gear set, n>1; the one-way wheel assembly is configured such that: the reel is transmission-connected to the gear set, the gear set is transmission-connected to the transmission wheel, and the rotation speed of the reel will cause the rotation speed of the transmission wheel to change after passing through the gear sets of different gears.

[0052] In some specific embodiments, the transmission wheel is annular, and its inner ring is provided with n rows of gear tracks matching the n-gear gear set; the gear set includes at least two transmission-connected gears, namely a driving wheel and a driven wheel; the driving wheel is transmission-connected to the reel, and the driven wheel is arranged on the gear track; the diameters of the n rows of the gear tracks are different and / or the diameters of the driving wheels in the n-gear gear set are different; the gear set is shifted on the gear track by a mountain bike shifting method, an electromagnet method or a servo method.

[0053] In some specific embodiments, the one-way wheel assembly includes a plurality of coaxially arranged sprockets with different diameters, each sprocket is connected to the reel, and the transmission member is a chain.

[0054] In some specific embodiments, the maximum diameter of the working part where the one-way wheel assembly cooperates with the transmission member is greater than the diameter of the outermost circle of the curtain material when the curtain material is fully retracted under normal working conditions of the rolling curtain; the rolling curtain also includes a rigid transmission assembly, and the rigid transmission assembly includes a transmission rigid belt, a reversing pulley and a steering pulley. The two ends of the transmission rigid belt are fixedly connected to the two ends of the bottom rail through length-limiting positioning members, and the transmission rigid belt extends along the outer edge of the transmission member, the reel and the bottom rail, and is turned at both ends of the reel through the steering pulley, and is reversed at one end of the bottom rail through the reversing pulley.

[0055] Beneficial effects of the present invention:

[0056] 1. The setting of the tensioning device allows the curtain material to maintain tension during winding and unwinding. Whether the tensioning device is through the friction between the transmission member and the transmission wheel, the friction between the reel and the transmission wheel, or the friction between the reel and the ratchet support shaft, it plays a role in making the displacement length of the transmission member consistent with the displacement length of the curtain material, so that the curtain material is kept in a tensioned state during unwinding and winding. Especially when the synchronization device assembly is set, the tensioning effect is better and will not wear the transmission member and other components.

[0057] 2. The setting of the synchronization device assembly ensures that the length of the curtain material wound and unwound by the reel is always synchronized with the running length of the side rail, keeping the curtain material taut, flat and not sagging, and also ensuring that the curtain material roll formed in the process of winding the curtain material onto the reel is neat, and each turn is evenly tight.

[0058] 3. The arrangement of the ratchet gear, the pawl and the pawl support shaft is such that: when the rotation direction is the same as the ratchet tooth tilting direction of the ratchet gear, the pawl is engaged in the ratchet tooth of the ratchet gear, pushing the ratchet gear and the pawl support shaft to rotate synchronously and the two rotate in the same direction; when the rotation direction is opposite to the ratchet tooth tilting direction of the ratchet gear, the pawl slips in the ratchet tooth of the ratchet gear, and the ratchet gear does not rotate synchronously with the pawl support shaft. Thus, the one-way transmission of the one-way wheel assembly is realized.

[0059] The roller blind of the present invention can keep the blind material taut, flat, and not sagging during the rolling and unrolling process, has a good user experience, and can be widely used in various scenarios where the roller blind is installed on the top surface, inclined surface, vertical surface, and needs to be inverted (closing downward is upright, closing upward is inverted).

[0060] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the rolling blind involved in the present invention.

[0062] Figure 2 It is a schematic exploded view of Example 1 of the rolling shutter involved in the present invention.

[0063] Figure 3 It is a partial cross-sectional schematic diagram of Example 1 of the rolling blind involved in the present invention.

[0064] Figure 4 It is a schematic diagram of the partial structure of the one-way wheel assembly in Example 1 of the present invention.

[0065] Figure 5 It is a right side view of the ratchet gear in embodiment 1 of the present invention.

[0066] Figure 6It is an exploded view of the ratchet gear in Example 1 of the present invention.

[0067] Figure 7 It is a cutaway exploded view of the synchronization device assembly in Embodiment 1 of the present invention.

[0068] Figure 8 It is a schematic cross-sectional structural diagram of the synchronization device assembly in Example 1 of the present invention.

[0069] Fig. 9 It is a schematic diagram of the appearance structure of the synchronization device assembly in Example 1 of the present invention.

[0070] Fig.10 It is a schematic diagram of the partial structure of the gear shifting assembly in embodiment 10 of the present invention.

[0071] Fig.11 It is a schematic diagram of the local structure including the transmission chain in Example 11 of the present invention.

[0072] Fig.12 It is a schematic diagram of the local structure including auxiliary wheels in Example 13 of the present invention.

[0073] Fig.13 It is a schematic diagram of the overall structure including the power source in Example 15 of the present invention (the power source drives the positioning pulley).

[0074] Fig.14 It is an exploded view of the power source in Example 15 of the present invention (the power source drives the positioning pulley).

[0075] Fig.15 It is a schematic diagram of the overall structure of the power source (power source driving reel) in Example 16 of the present invention.

[0076] Fig.16 It is an exploded view of the power source (power source driving reel) in Example 16 of the present invention.

[0077] Fig.17 It is a schematic diagram of the overall structure containing dual transmission parts in Example 17 of the present invention.

[0078] Fig.18 It is a schematic diagram of the cross-sectional structure containing dual transmission parts in Example 17 of the present invention.

[0079] Fig.19 It is an exploded view of the double transmission parts in Example 17 of the present invention.

[0080] Fig. 20 It is a schematic diagram of the overall structure of a dual transmission member with a power source in Example 18 of the present invention (the power source drives the positioning pulley).

[0081] Fig.21This is another schematic diagram of the overall structure of the embodiment 18 of the present invention containing a double transmission member with a power source (the power source drives the positioning pulley).

[0082] Fig. 22 It is an exploded view of the dual transmission member with power source in embodiment 18 of the present invention ((power source drives the positioning pulley).

[0083] Fig.23 It is a schematic diagram of the overall structure including rigid parts in Example 19 of the present invention.

[0084] Fig.24 It is an exploded view of the rigid parts in Example 19 of the present invention.

[0085] Fig.25 It is a schematic diagram of the overall structure of the rigid component with a power source in Example 20 of the present invention (the power source drives the positioning pulley).

[0086] Fig.26 It is an exploded view of the rigid component with a power source in Example 20 of the present invention (the power source drives the positioning pulley).

[0087] Fig. 27 It is a schematic diagram of the overall structure of the rigid component with a power source in Example 21 of the present invention (the power source drives the reel).

[0088] Fig.28 It is an exploded view of the rigid member with a power source (power source driving the reel) in Example 21 of the present invention.

[0089] Fig.29 It is a schematic diagram of the overall structure of the roller blind in Example 22 of the present invention.

[0090] Fig.30 It is an exploded view of the roller blind in Example 22 of the present invention. DETAILED DESCRIPTION

[0091] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0092] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "several" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0093] In addition, terms indicating orientation or positional relationships, such as “center”, “lateral”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, and “top”, are described based on the orientation or relative positional relationships shown in the accompanying drawings. They are only simplified descriptions for the convenience of describing the present invention, and do not indicate that the device or element referred to must have a specific orientation, a specific orientation structure, and an operation, and therefore should not be understood as a limitation on the present invention.

[0094] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 internally connected between 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.

[0095] Example 1

[0096] like Figure 1 and 2 As shown, the roller blind disclosed in this embodiment includes a reel 2, a curtain material 3, a length-limiting positioning member and a tensioning device. The curtain material 3 is wound around the reel 2, the fixed end of the curtain material 3 is connected to the reel 2, and the free end of the curtain material 3 can be unwound and reeled. The unwound and reeled-in of the curtain material 3 are realized by the rotation of the reel 2. For example, when the reel 2 rotates along a first direction, the curtain material 3 is unwound, and when the reel 2 rotates along a second direction, the curtain material 3 is reeled. A limited length positioning member is provided on one side of the free end of the curtain material 3. The limited length positioning member is used to limit the unwinding length and the reeling length of the curtain material 3. The limited length positioning member includes a positioning block 7. The positioning block 7 is connected to the curtain material 3. When the curtain material 3 moves, the positioning block 7 moves with the curtain material 3. In addition, the roller blind also includes a side rail 6. The positioning block 7 is provided in the side rail 6 and slides in the side rail 6.

[0097] The free end of the curtain material 3 is provided with a bottom rail 8, and the length-limiting positioning member is used to limit the unwinding length of the curtain material 3, including a positioning roller. The tensioning device can be located on the same side of the curtain material 3 as the length-limiting positioning member, or on the other side of the curtain material 3. The tensioning device includes a one-way wheel assembly 5, a transmission member 9 and a synchronization device assembly 4. Among them, the one-way wheel assembly 5 is arranged at one end of the reel 2 and is located on the same side as the length-limiting positioning member. One end of the reel 2 is connected to the one-way wheel assembly 5 so that the reel 2 and the one-way wheel assembly 5 rotate in the same direction. It should be noted that the one-way wheel assembly 5 also plays a role in fixing the reel 2. One end of the reel 2 is fixed on the one-way wheel assembly 5. For the convenience of installation, the other end of the reel 2 is fixed to the reel mounting seat 20 using a mechanism for fixing the reel. The mechanism for fixing the reel includes a shaft shell 21 and a sleeve 22. The shaft shell 21 is inserted into the reel 2, and the outer wall of the shaft shell 21 is in close contact with the inner wall of the reel 2. The sleeve 22 is inserted into the shaft shell 21. In some examples, the inner wall of the shaft shell 21 has a groove, and the outer wall of the sleeve 22 has a groove. The groove on the inner wall of the shaft shell 21 matches the groove on the outer wall of the sleeve 22. The sleeve 22 is installed on the reel mounting seat 20 by fasteners, so that the rotation of the reel 2 will not be affected by the reel mounting seat 20.

[0098] The transmission member 9 is annular, one end of the transmission member 9 is wrapped around the one-way wheel assembly 5, and the other end of the transmission member 9 is wrapped around the positioning roller. In this embodiment, the positioning roller is a fixed pulley or a positioning pulley. The transmission member 9 can realize transmission under the action of the one-way wheel assembly 5 and the fixed pulley. That is, the transmission member 9 can rotate in a circular track under the action of the one-way wheel assembly 5 and the positioning roller, and drive the one-way wheel assembly 5 to rotate. The transmission member 9 in this embodiment is specifically a conveyor belt. The reel 2 is connected to the transmission member 9 through the curtain material 3, and the synchronization device assembly 4 is arranged in the reel 2. The curtain material 3 is connected to the transmission member 9 through the bottom rail 8 arranged at the bottom of the free end of the curtain material 3. The transmission member 9 is connected to the positioning block 7, and the curtain material 3 is connected to the transmission member 9 through the positioning block 7. During the unwinding or winding process of the curtain material 3, the curtain material 3 is subjected to force and drives the tensioning device to move through the length-limiting positioning member, so that the reel 2 follows the tensioning device to move.

[0099] In this embodiment, the maximum diameter of the part where the one-way wheel assembly 5 cooperates with the transmission member is not greater than the diameter of the winding tube formed by the reel 2 and the curtain material 3 when the curtain material 3 is fully retracted in the normal working state of the rolling blind, that is, not greater than the sum of the diameter of the reel 2 when the curtain material 3 is fully retracted and twice the thickness of the curtain material 3 rolled on the winding tube. Compared with the reel 2, the one-way wheel assembly 5 is designed as a small disk, which is more practical and beautiful when the rolling blind is installed.

[0100] like Figure 4As shown, the one-way wheel assembly 5 includes a transmission wheel 51, a pawl 52 and a pawl support shaft 53. In this embodiment, the inner ring of the transmission wheel 51 is a ratchet gear. The ratchet teeth 511 of the ratchet gear are arranged in a circle and tilted toward the same side (i.e., arranged in a circle and tilted toward the same rotation direction) on the inner circumferential surface of the transmission wheel 51, the front end 522 of the pawl is placed in the ratchet teeth 511 of the ratchet gear, and the root 521 of the pawl is arranged on the outer circumferential surface of the pawl support shaft 53. The one-way wheel assembly 5 is configured so that when the rotation direction of the pawl support shaft 53 is the same as the tilt direction of the ratchet teeth 511 of the ratchet gear toward the outer periphery, the pawl 52 is engaged in the ratchet teeth 511 of the ratchet gear, and the transmission wheel 51 and the pawl support shaft 53 are driven to rotate synchronously and the two rotate in the same direction. When the rotation direction of the pawl support shaft 53 is opposite to the direction in which the ratchet teeth 511 of the ratchet gear are inclined toward the periphery, the pawl 52 slips in the ratchet teeth 511 of the ratchet gear, and the transmission wheel 51 does not rotate synchronously with the pawl support shaft 53. Figure 5 ), the ratchet teeth 511 of the ratchet gear are arranged counterclockwise and tilted around the inner circumference of the ratchet gear, and the inclination angle of each ratchet tooth is the same.

[0101] A limiting groove is provided on the outer circumferential surface of the pawl support shaft 53, and the limiting groove is connected to the pawl 52 through the support member 523 ( Figure 5 The limiting groove is used to limit the rotation range of the pawl 52 around the support member 523, so that the pawl 52 can rotate to facilitate slipping when the pawl 52 slips in the ratchet teeth 511 of the ratchet gear, and the pawl 52 is engaged in the ratchet teeth 511 of the ratchet gear to drive the transmission wheel 51 and the pawl support shaft 53 to rotate synchronously, and the pawl 52 does not rotate around the support member 523 to facilitate driving the transmission wheel 51.

[0102] like Figures 7 to 9 As shown, the synchronization device assembly 4 includes a housing, a friction assembly, an adjustment assembly and a rotating shaft 47. The housing is in transmission connection with the reel 2. In some examples, the housing is integrally formed with the reel 2. The adjustment assembly and the friction assembly are both arranged in the housing, and the friction assembly and the adjustment assembly are both sleeved on the rotating shaft 47. The friction assembly drives the housing and the rotating shaft 47 to rotate synchronously by friction force, and the adjustment assembly adjusts the friction force inside the friction assembly by applying pressure to the friction assembly, that is, the housing is in transmission connection with the rotating shaft 47 through the friction assembly.

[0103] Specifically, the friction assembly includes a first friction ring 42 and a second friction ring 43. The rotating shaft 47 passes through the first friction ring 42 and the second friction ring 43. A first linkage component 421 is provided on the outer ring profile of the first friction ring 42, which is a protrusion extending outward. The first linkage component 421 matches the depression provided at the corresponding position of the inner wall of the outer shell, so that the outer shell and the first friction ring 42 rotate synchronously (for example, the first friction ring 42 can rotate with the outer shell). The first friction ring 42 is close to the second friction ring 43, and the friction force between the two drives the first friction ring 42 to rotate with the second friction ring 43. That is, the friction force between the two drives the first friction ring 42 and the second friction ring 43 to rotate in the same direction.

[0104] The inner contour of the second friction ring 43 matches the shape of the outer contour of the cross section of the rotating shaft 47, so that the rotating shaft 47 can rotate with the second friction ring 43. The outer contour of the cross section of the rotating shaft 47 is a regular octagon (so the rotating shaft 47 in this embodiment is also called an octagonal tube. It can also be understood that a second linkage component matching the outer contour of the rotating shaft 47 is provided on the inner ring contour of the second friction ring 43, so that the second friction ring 43 rotates synchronously with the rotating shaft (for example, the rotating shaft 47 can rotate with the second friction ring 43), but the second linkage component is a part of the inner contour of the second friction ring 43 that makes the inner ring contour of the second friction ring 43 become the inner contour of the second friction ring 43 that matches the outer contour of the cross section of the rotating shaft 47. For example, the cross section of the inner ring contour of the second friction ring 43 is circular, and due to the presence of the second linkage component, the cross section of the inner contour of the second friction ring 43 becomes a regular octagon that matches the outer contour of the cross section of the rotating shaft 47 (not shown in the figure). The rotating shaft 47 is connected to the pawl support shaft 53, so that the rotating shaft 47 can rotate with the pawl support shaft 53.

[0105] The adjusting component adjusts the friction between the first friction ring 42 and the second friction ring 43 by applying pressure to the friction component. The adjusting component includes a first pressure member 44, an elastic member 45, and a second pressure member 46 arranged in sequence; the adjusting component changes the pressure applied to the friction component by the expansion and contraction of the elastic member 45, thereby adjusting the friction between the first friction ring 42 and the second friction ring 43. The outer contour of the first pressure member 44 and the outer contour of the second pressure member 46 are both the same as the outer contour of the first friction ring 42, so that the first pressure member 44 and the second pressure member 46 can rotate with the housing. In some examples, the outer contour of the first pressure member 44 and the outer contour of the second pressure member 46 may also be different from the outer contour of the first friction ring 42, but the first pressure member 44 and the second pressure member 46 need to be close to the first friction ring 42. The first pressure member 44 and the second pressure member 46 are annular. The first friction ring 42, the second friction ring 43, the first pressure member 44 and / or the second pressure member 46 use brake pads.

[0106] like Figure 8 and 9As shown, the elastic member 45 is a spring. The elastic deformation degree of the elastic member 45 is adjusted by a fastener. The fastener is a bolt structure, and the fastener includes a push rod 413 and a fixing member 414. The extension degree of the push rod 413 can change the elastic deformation force on the elastic member 45, thereby adjusting the elastic deformation degree of the elastic member 45. In some examples, the first pressure member 44 and the second pressure member 46 can be omitted, that is, the elastic member 45 is installed on the first friction ring 42 by welding, and the push rod 413 and the spring are used to apply pressure. In some examples, the first pressure member 44 and the second pressure member 46 are respectively placed close to the first friction ring 42 or the second friction ring 43, and the outer contours of the first pressure member 44 and the second pressure member 46 do not need to be the same as the outer contours of the first friction ring 42 or the second friction ring 43, and the first pressure member 44 and the second pressure member 46 only need to be annular.

[0107] The adjustment assembly and the friction assembly are arranged in a space enclosed by the side wall 415 of the housing and the end plate 412 of the housing. The push rod 413 passes through the end plate 412 of the housing. The first end of the push rod 413 supports the adjustment assembly, and the second end of the push rod 413 is exposed outside the end plate 412 and is provided with a fixing member 414 to fix the push rod 413. In this embodiment, the fixing member 414 and the push rod 413 are a nut and a screw respectively, and the number of each is 3.

[0108] The number of the first friction ring 42 and the second friction ring 43 are both greater than or equal to 1, and the transmission effect from the housing to the rotating shaft 47 is adjusted by changing the friction area by adjusting the arrangement of the first friction ring 42 and the second friction ring 43. In this embodiment, the number of the first friction ring 42 is 4, and the number of the second friction ring 43 is 3, but the number of the two in the present invention is not limited thereto.

[0109] When the friction area between the first friction ring 42 and the second friction ring 43 needs to be increased, the first friction ring 42 and the second friction ring 43 are all arranged alternately; when the friction area between the first friction ring 42 and the second friction ring 43 needs to be appropriately reduced, the first friction ring 42 and the second friction ring 43 are partially arranged alternately; when the friction area between the first friction ring 42 and the second friction ring 43 needs to be reduced to the maximum and the friction area is not zero, the first friction ring 42 and the second friction ring 43 are arranged in two teams, so that the friction area is only the area where one first friction ring 42 contacts one second friction ring 43. In most cases of this embodiment, the first friction ring 42 and the second friction ring 43 are all arranged alternately.

[0110] The following specifically introduces the unwinding process and the rewinding process of the roller blind.

[0111] When the rolling curtain is unrolled, the one-way wheel assembly 5 is in a slipping state, and the bottom rail 8 is manually pulled to unfold the curtain material 3. At this time, the manually generated power can be divided into two force transmission paths. The first force transmission path is that the power drives the bottom rail 8. Since the bottom rail 8 is connected to the transmission member 9, the bottom rail 8 drives the transmission member 9 to move. Since the transmission member 9 surrounds the transmission wheel 51, the transmission member 9 drives the transmission wheel 51 to rotate, that is, the first force transmission path is from the bottom rail 8 to the transmission member 9 to the transmission wheel 51. The second force transmission path is that the power drives the bottom rail 8. Since the bottom rail 8 is connected to the curtain material 3, the bottom rail 8 drives the curtain material 3 to move. Since the curtain material 3 is wrapped around the reel 2, the curtain material 3 drives the reel 2 to rotate. The inner wall of the reel 2 fits with the outer shell of the synchronization device assembly 4, so that the outer shell rotates with the reel 2. At this time, the first friction ring 42 located in the outer shell rotates with the outer shell, and the second friction ring 43 rotates with the first friction ring 42 due to the influence of friction force, and then drives the rotating shaft 47 to rotate, and the rotating shaft 47 drives the pawl support shaft 53 to rotate. That is, the second force transmission path is from the bottom rail 8 to the curtain material 3 to the reel 2 to the outer shell of the synchronization device assembly 4 to the first friction ring 42 to the second friction ring 43 to the rotating shaft 47 to the pawl support shaft 53. Since the minimum diameter of the curtain material 3 wound on the reel 2 under tension is different from the maximum diameter of the transmission member 9 at the one-way wheel assembly 5, the difference between the two forces is offset by the slipping ratchet gear at the outer ring of the transmission wheel, so that the curtain material 3 and the transmission member 9 produce the same displacement distance.

[0112] During the unwinding process, affected by the first force transmission path, the bottom rail 8 drives the transmission member 9, and the transmission member 9 drives the transmission wheel 51 to rotate, and the length of the curtain material pulled out (L'unwinding) is equal to the transmission wheel speed (vtransmission wheel) multiplied by time (t) multiplied by 2π the radius of the transmission member on the transmission wheel (rtransmission member), that is, Formula 1. Note: The speed in the present invention refers to the number of revolutions per unit time, so it needs to be multiplied by the circumference of each revolution.

[0113] L'release = v transmission wheel × t × 2πr transmission parts formula 1

[0114] At the same time, the curtain material 3 drives the reel 2 to rotate, the reel 2 drives the outer shell, the outer shell drives the first friction ring 42, the first friction ring 42 drives the second friction ring 43, the second friction ring 43 drives the rotating shaft 47, and the rotating shaft 47 drives the pawl support shaft 53. At this time, the length of the unwound curtain material (Lun) is equal to the reel rotation speed (vreel) multiplied by the time (t) multiplied by 2π The radius of the outermost circle of the unwound curtain material on the reel (rcurtain material), that is, Formula 2.

[0115] L release = v reel × t × 2πr curtain material formula 2

[0116] The t in formulas 1 and 2 always remains the same. Since the radius of the outermost unwinding curtain material on the reel in this embodiment (r curtain material) is greater than or equal to the radius of the transmission member on the transmission wheel (r transmission member), when the curtain material is unwinding, the maximum value of r curtain material exceeds r transmission member. Therefore, at the initial stage of unwinding, r curtain material must be greater than r transmission member. Then according to formulas 1 and 2, L' release tends to be less than L release, which will inevitably cause the curtain material to wrinkle. However, due to the setting of the one-way wheel assembly, unwinding will cause the pawl to slip, so that v transmission wheel is greater than v reel, so as to continue to keep L' release equal to L release. Or because the pawl slips, the pawl cannot drive the transmission wheel at all, and only the bottom rail pulls the transmission member, and the transmission member drives the transmission wheel to move, so as to continue to keep L' release equal to L release.

[0117] When the roller blind is rolled up, the bottom rail 8 is manually pulled to roll up the blind material 3. At this time, the manual power is generated to drive the bottom rail 8, the bottom rail 8 drives the transmission member 9, and the transmission member 9 drives the transmission wheel 51. At this time, the one-way wheel assembly 5 is in a locked state, and the pawl 52 is engaged in the ratchet 511, pushing the transmission wheel 51 and the pawl support shaft 53 to rotate synchronously, the pawl support shaft 53 drives the rotating shaft 47 to rotate, and the rotating shaft 47 drives the second friction ring 43. That is, in the first force transmission path, the bottom rail 8 to the transmission member 9 to the transmission wheel 51 to the pawl support shaft 53 to the second friction ring 43 and the rotating shaft 47.

[0118] In this embodiment, the maximum diameter of the working part where the one-way wheel assembly 5 cooperates with the transmission member 9 is not greater than the diameter of the outermost circle of the curtain material 3 when the curtain material 3 is fully retracted in the normal working state of the roller blind.

[0119] Example 2

[0120] In this embodiment, in the right view of the ratchet gear, the ratchet teeth of the ratchet gear are arranged clockwise and around the inner circumference of the ratchet gear. The rest of the structure is the same as that of embodiment 1. The unwinding process is similar to the winding process of embodiment 1, except that the unwinding direction and the winding direction are different.

[0121] Example 3

[0122] In this embodiment, the inclination angles of some ratchet teeth are different. The rest are the same as in the first embodiment.

[0123] Embodiment 4 (without synchronization device assembly)

[0124] The roller blind in the present embodiment does not include a synchronization device assembly. The function of the synchronization device assembly is realized by friction slipping due to the coaxial rotation of the transmission member and the ratchet gear, that is, the pulling force is transmitted to the transmission member through the bottom rail, the transmission member is transmitted to the ratchet gear, the ratchet gear transmits the power to the reel, and the reel realizes the unwinding or winding of the curtain material, while the transmission member drives the unwinding or winding of the curtain material connected to the bottom rail. The speed of the reel rewinding and unwinding the curtain material is synchronized with the speed of the side rail rewinding and unwinding the curtain material, which will cause friction slipping between the transmission member and the ratchet gear to realize the synchronization function of the synchronization device assembly in Example 1. However, the difference between this embodiment and Example 1 is that the rapid friction between the transmission member and the ratchet gear will generate high temperature, and a large amount of heat will increase the temperature of the transmission member. The inability to effectively dissipate heat will cause the transmission member to soften, thereby accelerating the wear of the transmission member. Therefore, the slipping of the transmission member does not mean that the tensioning purpose cannot be achieved, but the transmission member is easy to wear and has a short service life. The purpose of using a single synchronization device assembly in Example 1 is to use the wear resistance of the friction assembly (for example, the first friction ring, the second friction ring, the first pressure member and / or the second pressure member are all brake pads) to extend the service life of the roller blind with the tensioning device, which is considered from the perspective of product life. The rest of the structure is the same as that in Example 1.

[0125] During unwinding, the ratchet support shaft drives the reel, and when r curtain material is greater than r transmission member, enough to make the pulling force of the bottom rail on the curtain material greater than the friction between the transmission member and the ratchet gear, slippage occurs between the transmission member and the ratchet gear, making v ratchet gear smaller than v reel, so that L unwinding continues to be equal to L' unwinding. The rest of the unwinding process is the same as that of Example 1.

[0126] During winding, the ratchet support shaft drives the winding shaft, and the bottom rail pulls the transmission member, and the movement of the transmission member can still continue to keep L'wind equal to Lwind. The rest of the winding process is the same as that of Example 1.

[0127] Example 5

[0128] In this embodiment, the adjustment component includes a first pressure member, an electromagnetic relay, and a second pressure member. The adjustment component adjusts the distance between the first pressure member and the second pressure member through the electromagnetic relay to change the pressure applied by the adjustment component to the friction member, thereby adjusting the friction between the first friction ring and the second friction ring. The distance between the first pressure member and the second pressure member changes with the change of the electromagnetic field generated by the electromagnetic relay. In some examples, the electromagnetic relay can be used to adjust the first pressure member without adjusting the second pressure member. The rest is the same as in Example 1.

[0129] Example 6

[0130] In this embodiment, the fastener is a punching pin structure, and the distance between the first pressure member and the second pressure member is adjusted according to the distance of the holes on the rod inserted between the first pressure member and the second pressure member to change the pressure applied by the adjustment component to the friction component, thereby adjusting the friction between the first friction ring and the second friction ring. The rest is the same as in embodiment 1.

[0131] Example 7

[0132] In this embodiment, the first linkage component is a recessed inward, and a protrusion matching the first linkage component is provided at a corresponding position on the inner wall of the housing; the second linkage component is a protrusion extending inward, and a recess matching the second linkage component is provided at a corresponding position on the outer contour of the shaft. In some examples, it is sufficient that the first linkage component matches the outer contour of the housing, and an octagonal tube-shaped shaft is directly used without providing a recess on the outer wall of the shaft. The rest is the same as in Embodiment 1.

[0133] Example 8

[0134] In this embodiment, the first linkage member includes both an outwardly extending protrusion and an inwardly retracted recess, and the inner wall of the housing is provided with a recess matching the outwardly extending protrusion at a position corresponding to the outwardly extending protrusion, and the inner wall of the housing is provided with a protrusion matching the inwardly retracted recess at a position corresponding to the inwardly retracted recess. In some examples, it is sufficient for the first linkage member to be clamped on the inner wall of the housing. The rest is the same as in Embodiment 1.

[0135] Example 9

[0136] In this embodiment, the inner wall profile of the cross section of the housing may be circular or non-circular. When the inner wall profile of the cross section of the housing is circular, the inner wall of the housing needs to be clamped to the first friction ring by a circular interference fit. When the inner wall profile of the cross section of the housing is not circular, the outer contour of the first friction ring matches the inner wall profile of the cross section of the housing, so that the first friction ring can rotate with the housing and can move arbitrarily in the horizontal direction when under pressure; the first linkage component is a part of the outer contour of the first friction ring that makes the outer ring profile of the first friction ring match the inner wall profile of the cross section of the housing. The second linkage component includes both a protrusion extending inward and a recess retracted into the ring. The outer contour of the rotating shaft 47 is provided with a recess matching the protrusion extending inward at a position corresponding to the protrusion extending inward, and the outer contour of the rotating shaft 47 is provided with a protrusion matching the recess retracted into the ring at a position corresponding to the recess retracted into the ring. The rest is the same as in Example 1.

[0137] Example 10

[0138] In this embodiment ( Fig.10), the transmission wheel assembly does not include a pawl and a pawl supporting shaft, but includes a gear shift assembly; the gear shift assembly includes n gear sets, which are the first gear set...the nth gear set in sequence, n>1; the transmission wheel assembly is configured as follows: the rotating shaft 47 is transmission-connected with the gear set, the gear set is transmission-connected with the transmission wheel 5, and the rotation speed of the rotating shaft 47 will cause the rotation speed of the transmission wheel 5 to change after passing through the gear sets of different gears. The transmission wheel 5 is annular, and n rows of gear tracks 61 are arranged on its inner ring to match the n gear sets; the gear set includes at least two transmission-connected gears, namely a driven wheel 63 and a driving wheel 62; the driving wheel 62 is transmission-connected with the rotating shaft 47, and the driven wheel 63 is arranged on the gear track 61; the diameters of the n rows of gear tracks are different and / or the diameters of the driven wheels in the n gear sets are different. In this embodiment, n=2. The remaining structures are the same as those in embodiment 1.

[0139] Embodiment 11

[0140] like Fig.11 As shown, in this embodiment, the transmission member 9 is a transmission chain; the outer peripheral contours of the transmission wheel 51 and the positioning roller have teeth matching the transmission chain to ensure that there is no slippage between the transmission chain and the transmission wheel, and between the transmission chain and the positioning roller. The transmission wheel assembly does not include a pawl and a pawl support shaft, but the number of transmission wheels 51 is m, namely, the first gear transmission wheel...the mth gear transmission wheel, m>1. The radius of the first gear transmission wheel is the largest, the radius of the second gear transmission wheel is the second,..., the radius decreases successively, and the radius of the mth gear transmission wheel is the smallest. In this embodiment, m is equal to 2, that is, the transmission wheels include the first gear transmission wheel 5110 and the second gear transmission wheel 5120. The rotating shaft 47 is transmission-connected to the transmission wheel 51, and the transmission member 9 is transmission-connected between the transmission wheels 51 of different radii through the mountain bike shifting method.

[0141] When unwinding, the shift mechanism (i.e., the mountain bike shift mechanism) switches to the (small radius) transmission wheel (the second gear transmission wheel 5120), thereby achieving the purpose that the curtain material radius is larger than the transmission wheel radius, so that the curtain material will be tensioned when the roller curtain with the tensioning device is unwinding; when winding, the shift mechanism switches to the (large radius) transmission wheel (the first gear transmission wheel 5110), thereby achieving the purpose that the curtain material radius is smaller than the transmission member radius, so that the curtain material will be tensioned when the roller curtain with the tensioning device is winding. The rest is the same as in Example 1. For example, both ends of the bottom rail 8 are connected to the transmission member 9, so that the bottom rail 8 moves with the transmission member 9. The installation position of the synchronization device assembly 4 is the same as in Example 1.

[0142] Example 12

[0143] In this embodiment, the transmission member is a transmission chain, and the ratchet gear is a ratchet sprocket that can cooperate with the transmission chain for transmission. The outer contour of the ratchet sprocket is provided with convex teeth that can be inserted into the gap between the transmission chains, thereby ensuring that the transmission chain and the ratchet sprocket are synchronously transmitted without slipping. The rest is the same as in embodiment 1.

[0144] Example 13

[0145] like Fig.12 As shown, the one-way wheel assembly further includes an auxiliary wheel 71, which is disposed near the transmission wheel 51. Here, the auxiliary wheel 71 needs to be kept parallel to the axis of the transmission wheel 51. After the transmission member 9 surrounds the transmission wheel 51, it also surrounds the auxiliary wheel 71, and the transmission wheel 51 drives the auxiliary wheel 71 to rotate. The rest is the same as in Example 1.

[0146] Embodiment 14

[0147] In this embodiment, the transmission member is a transmission wire, and the transmission wheel is a transmission wire wheel that can cooperate with the transmission wire for transmission. The rest is the same as that of embodiment 1 or 10 (shift gear).

[0148] Embodiment 15

[0149] In this embodiment, if Fig.13 and Fig.14 As shown, the roller blind further comprises a power source 1, which is a motor. The power source 1 is connected to the positioning roller and drives the positioning roller to rotate. After the positioning roller rotates, it drives the transmission member 9 to rotate. The positioning block 7 moves following the transmission member 9. The transmission member 9 drives the one-way wheel assembly 5 to rotate. The one-way wheel assembly 5 drives the reel 2 to rotate, thereby realizing the unwinding and / or winding of the curtain material 3. The rest is the same as that of the embodiment 1.

[0150] Example 16

[0151] In this embodiment, if Fig.15 and Fig.16 As shown, the roller blind further includes a power source 1, which is a motor. The power source 1 is arranged in the reel inside the shaft 2, and drives the reel 2 to rotate, the reel 2 drives the one-way wheel assembly 5 to rotate, the one-way wheel assembly 5 drives the transmission member 9 to rotate, and the positioning block 7 moves with the transmission member 9 to achieve the unwinding and / or winding of the curtain material. The power source 1 is arranged inside the reel 2, and the rotating shaft 47 is a hollow shaft at this time. The wire of the motor serving as the power source 1 passes through the hollow shaft and is connected to the power socket.

[0152] Embodiment 17

[0153] In this embodiment, if Fig.17 , Fig.18 , Fig.19 As shown, there are two length-limiting positioning members 7 and two tensioning devices, the two length-limiting positioning members 7 are respectively connected to the two sides of the free end of the curtain material 3, and the two tensioning devices are arranged in the reel 2, preferably at the two ends of the reel 2. The rest is the same as in Example 1.

[0154] Embodiment 18

[0155] In this embodiment, if Fig. 20 , Fig.21 , Fig. 22 As shown, the roller blind also includes a power source 1, and the power source 1 is a motor. The power source 1 is connected to the positioning roller and drives the positioning roller to rotate. At this time, the positioning roller is a positioning roller. After the positioning roller rotates, it drives the transmission member 9 to rotate. The positioning block 7 moves following the transmission member 9. The transmission member 9 drives the one-way wheel assembly 5 to rotate. The one-way wheel assembly 5 drives the reel 2 to rotate to achieve the unwinding and / or winding of the curtain material. The rest is the same as Example 17. In this embodiment, one power source 1 can be set, and one power source 1 can simultaneously drive the two positioning rollers on both sides to rotate. Fig. 20 As shown. Two power sources 1 can also be provided, and the two power sources 1 respectively drive the two positioning rollers to rotate, as shown in FIG. Fig.21 As shown, at this time, the two power sources 1 need to be kept synchronous so that the two positioning rollers can keep rotating synchronously.

[0156] Embodiment 19

[0157] In this embodiment, if Fig.23 and Fig.24 As shown, the rolling curtain further includes a rigid member 80, which is a steel wire. The free end of the curtain material is provided with a bottom rail 8 parallel to the reel 2, and the two ends of the bottom rail 8 are respectively connected to the two symmetrically arranged positioning blocks 7, and a fixing seat 81 is symmetrically arranged with the positioning roller, and a reversing wheel is arranged in the fixing seat 81, and a steering wheel is arranged near the two ends of the reel 2, and a steering wheel is arranged at one end of the reel 2 close to the one-way wheel assembly 5. The rigid member 80 is extended from the length-limiting positioning member to one end of the reel 2 to achieve steering, and the steering is achieved at the other end of the reel 2 by two steering wheels stacked up and down to prevent the rigid member 80 from touching the rolling curtain 3 and affecting the unwinding and winding.

[0158] It can be understood that one end of the rigid member 80 is connected to the positioning block 7, and the other end of the rigid member is connected to the bottom rail through the fixing seat 81. The rigid member 80 is a rigid connection line with two symmetrically arranged positioning blocks 7 as the starting point and the end point. The rigid member 80 surrounds the transmission member 9 and the reel 2, and is turned by a plurality of the steering wheels during the process, and then reversed by the reversing wheel. The reversing wheel is arranged in the fixing seat 81, and the two positioning blocks 7 are symmetrical with the longitudinal center axis of the reel, and the positioning roller and the fixing seat 81 are also symmetrical with the longitudinal center axis of the reel. The rest is the same as that of Example 1.

[0159] In one example, the roller blind also has a rigid transmission assembly, and the rigid transmission assembly includes a transmission rigid belt (similar to a steel wire), a reversing pulley and a steering pulley. The two ends of the transmission rigid belt are fixedly connected to the two ends of the bottom rail 8 through length-limiting positioning parts. The transmission rigid belt extends along the outer edge of the transmission member 9, the reel 2 and the bottom rail 8, and is turned at both ends of the reel 2 through the steering pulley, and is reversed at one end of the bottom rail 8 through the reversing pulley.

[0160] Embodiment 20

[0161] In this embodiment, if Fig.25 and Fig.26 As shown, the roller blind further comprises a power source 1, the power source 1 is connected to the positioning roller, and drives the positioning roller to rotate, the positioning roller rotates and drives the transmission member 9 to rotate, the positioning block 7 moves following the transmission member 9, the transmission member 9 drives the one-way wheel assembly 5 to rotate, the one-way wheel assembly 5 drives the reel 2 to rotate, and the unwinding and / or rewinding of the blind material is realized. The rest is the same as that of embodiment 19.

[0162] Embodiment 21

[0163] In this embodiment, if Fig. 27 and Fig.28 As shown, the roller blind further comprises a power source 1, the power source 1 is arranged in the reel 2, and drives the reel 2 to rotate, the reel 2 drives the one-way wheel assembly 5 to rotate, the one-way wheel assembly 5 drives the transmission member 9 to rotate, and the positioning block 7 moves following the transmission member 9 to achieve unwinding and / or winding of the blind material. The rest is the same as that of embodiment 19.

[0164] Embodiment 22

[0165] In this embodiment, if Fig.29 and Fig.30As shown, the maximum diameter of the portion where the one-way wheel assembly 5 cooperates with the transmission member is larger than the diameter of the rolling tube formed by the reel 2 and the curtain material 3 when the curtain material 3 is fully retracted in the normal working state of the roller blind, that is, it is not larger than the sum of the diameter of the reel 2 when the curtain material 3 is fully retracted and twice the thickness of the curtain material 3 rolled on the rolling tube.

[0166] The roller shutter also includes a rigid member 8 and a power source 1. The free end of the curtain material 3 is provided with a bottom rail parallel to the roller 2. The two ends of the bottom rail 8 are respectively connected to the two symmetrically arranged positioning blocks 7. A fixing seat 81 is symmetrically arranged with the positioning roller. A reversing wheel is arranged in the fixing seat 81. Steering wheels are arranged near the two ends of the roller 2. A steering wheel is arranged at one end of the roller 2 close to the one-way wheel assembly 5. The rigid member 80 is extended from the positioning block 7 to one end of the roller 2 to achieve steering. At the other end of the roller 2, steering is achieved by two steering wheels stacked up and down. At this time, the rigid member 80 can be higher than the roller shutter 3 after steering to avoid the rigid member 80 touching the roller shutter 3 and affecting the unwinding and winding.

[0167] The power source 1 is arranged in the reel 2 and drives the reel 2 to rotate, the reel 2 drives the one-way wheel assembly 5 to rotate, the one-way wheel assembly 5 drives the transmission member 9 to rotate, and the positioning block 7 moves following the transmission member 9 to realize the unwinding and / or winding of the curtain material;

[0168] One end of the rigid member 80 is connected to the length-limiting positioning member 7, and the other end of the rigid member is connected to the bottom rail 8 through the fixed seat 81. The rigid member 80 is a rigid connection line with the two symmetrically arranged positioning blocks 7 as the starting point and the end point. After the rigid member 80 surrounds the transmission member 9 and the reel 2, it is steered by multiple steering wheels and then reversed by a reversing wheel. The reversing wheel is arranged in the fixed seat 81. The two positioning blocks 7 are symmetrical with respect to the longitudinal center axis of the reel, and the positioning roller and the fixed seat 81 are also symmetrical with respect to the longitudinal center axis of the reel.

[0169] The above describes in detail the preferred specific embodiments of the present invention, but does not exhaust all implementation schemes. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rolling blind, characterized in that: It includes a reel, a curtain material, a length-limiting positioning member and a tensioning device, wherein the fixed end of the curtain material is arranged on the reel, the free end of the curtain material is provided with a bottom rail, and the length-limiting positioning member is used to limit the unwinding length of the curtain material, and includes a positioning roller; The tensioning device comprises a one-way wheel assembly and a transmission member, one end of the reel is connected to the one-way wheel assembly through the tensioning device, so that the reel and the one-way wheel assembly rotate in the same direction, and the transmission member is annular and surrounds the one-way wheel assembly and the positioning roller; The transmission member is connected to the length-limiting positioning member, and the curtain material is connected to the transmission member through the length-limiting positioning member. During the unwinding or rewinding process of the curtain material, the curtain material, the length-limiting positioning member, and the transmission member move synchronously; The maximum diameter of the working part where the one-way wheel assembly cooperates with the transmission member is not greater than the diameter of the outermost circle of the curtain material when the curtain material is fully retracted in the normal working state of the rolling curtain.

2. The roller blind according to claim 1, characterized in that: The tensioning device also includes a synchronization device assembly connected to the reel in a transmission manner; the synchronization device assembly includes a housing, a friction assembly and a rotating shaft, and the friction assembly and the rotating shaft are both arranged in the housing. The friction assembly includes a first friction ring and a second friction ring; the rotating shaft passes through the first friction ring and the second friction ring; a second linkage component matching the outer contour of the rotating shaft is arranged on the inner ring contour of the second friction ring, so that the second friction ring rotates synchronously with the rotating shaft; the first friction ring is close to the second friction ring, and the first friction ring and the second friction ring are driven to rotate in the same direction through the friction force between the two; a first linkage component matching the inner wall of the outer shell is arranged on the outer ring contour of the first friction ring, so that the outer shell rotates synchronously with the first friction ring; the synchronization device assembly is connected to the transmission member through the one-way wheel assembly.

3. The roller blind according to claim 2, characterized in that: The housing and the reel are integrally formed.

4. The roller blind according to claim 2, characterized in that: The synchronizer assembly further includes an adjusting assembly; the adjusting assembly adjusts the friction force between the first friction ring and the second friction ring by applying pressure to the friction assembly.

5. The roller blind according to claim 4, characterized in that: The adjustment component includes an elastic member; the elastic member controls the pressure applied to the friction component through the degree of elastic deformation, thereby adjusting the friction force between the first friction ring and the second friction ring.

6. The rolling blind according to claim 5, characterized in that The adjustment component also includes a first pressure-applying member; the elastic member transmits pressure generated by elastic deformation to the friction component via the first pressure-applying member.

7. The roller blind according to claim 6, characterized in that The outer contour of the first pressure member matches the outer contour of the first friction ring, so that the first pressure member can rotate with the housing.

8. The roller blind according to claim 7, characterized in that: The first pressure member is annular; the inner ring profile of the first pressure member is the same as the inner ring profile of the second friction ring, so that the rotating shaft can rotate with the first pressure member.

9. The rolling blind according to claim 7, characterized in that: The adjustment assembly also includes a second pressure member; the first pressure member, the elastic member and the second pressure member are arranged in sequence.

10. The roller blind according to claim 9, characterized in that The first pressure member and the second pressure member are ring-shaped; The outer contour of the first pressure member and the outer contour of the second pressure member are both the same as the outer contour of the first friction ring, so that the first pressure member and the second pressure member can rotate with the housing; or The inner contours of the first pressure member and the second pressure member are both the same as the inner contour of the second friction ring, so that the rotating shaft can rotate with the first pressure member and the second pressure member.

11. The roller blind according to claim 5, characterized in that: The elastic deformation degree of the elastic member is adjusted by a fastener; the fastener includes a push rod; the extension and retraction degree of the push rod can change the elastic deformation force applied to the elastic member, thereby adjusting the elastic deformation degree of the elastic member.

12. The roller blind according to claim 11, characterized in that The adjustment assembly further includes a first pressure member and a second pressure member; the first pressure member, the elastic member and the second pressure member are arranged in sequence; and the fastener is disposed on the first pressure member and / or the second pressure member.

13. The roller blind according to claim 11, characterized in that: The adjustment assembly and the friction assembly are arranged in a space enclosed by the side wall of the outer shell and the end plate of the outer shell; the push rod passes through the end plate of the outer shell; the first end of the push rod supports the adjustment assembly, and the second end of the push rod is exposed to the outside of the end plate and is provided with a fixing member to fix the push rod.

14. The roller blind according to claim 2, characterized in that: The first linkage component is a protrusion extending outward, and a depression matching the first linkage component is arranged at a corresponding position of the inner wall of the shell; or the first linkage component is a depression retracted inward, and a protrusion matching the first linkage component is arranged at a corresponding position of the inner wall of the shell; or the first linkage component includes both a protrusion extending outward and a recess retracted inward, and the inner wall of the shell is provided with a recess matching the protrusion extending outward at a position corresponding to the protrusion extending outward, and the inner wall of the shell is provided with a protrusion matching the protrusion extending outward at a position corresponding to the inwardly retracted recess.

15. The roller blind according to claim 2, characterized in that: The outer contour of the first friction ring matches the inner wall contour of the cross section of the housing, so that the first friction ring can rotate with the housing; the first linkage component is a part of the outer contour of the first friction ring that makes the outer ring contour of the first friction ring become the part that matches the inner wall contour of the cross section of the housing.

16. The roller blind according to claim 2, characterized in that: The second linking component is a protrusion extending inwardly, and a depression matching the second linking component is arranged at a corresponding position of the outer contour of the rotating shaft; or the second linking component is a depression retracted into the ring, and a protrusion matching the second linking component is arranged at a corresponding position of the outer contour of the rotating shaft; or the second linking component includes both a protrusion extending inwardly and a depression retracted into the ring, and the outer contour of the rotating shaft is provided with a depression matching the protrusion extending inwardly at a position corresponding to the protrusion extending inwardly, and the outer contour of the rotating shaft is provided with a protrusion matching the depression retracted into the ring at a position corresponding to the depression retracted into the ring.

17. The roller blind according to claim 2, characterized in that: The inner contour of the second friction ring matches the outer contour of the cross section of the rotating shaft, so that the rotating shaft can rotate with the second friction ring; the second linkage component is a part of the inner contour of the second friction ring that makes the inner ring contour of the second friction ring become matched with the outer contour of the cross section of the rotating shaft.

18. The roller blind according to claim 2, characterized in that: The number of the first friction ring or the second friction ring is greater than or equal to one, and the transmission effect from the housing to the rotating shaft is adjusted by changing the friction area through adjusting the arrangement of the first friction ring and the second friction ring.

19. The rolling blind according to claim 1, characterized in that: The one-way wheel assembly includes a transmission wheel, a pawl and a pawl support shaft; the inner ring of the transmission wheel is a ratchet gear; the ratchet teeth of the ratchet gear are arranged in a circle on the inner circumferential surface of the ratchet gear in the same rotation direction, the front end of the pawl is placed in the ratchet teeth of the ratchet gear, and the root of the pawl is arranged on the outer circumferential surface of the pawl support shaft; the one-way wheel assembly is configured as follows: when the rotation direction of the pawl support shaft is the same as the inclination direction of the ratchet teeth of the ratchet gear, the pawl is engaged in the ratchet teeth of the ratchet gear, pushing the ratchet gear and the pawl support shaft to rotate synchronously and the two have the same rotation direction; when the rotation direction of the pawl support shaft is opposite to the inclination direction of the ratchet teeth of the ratchet gear, the pawl slips in the ratchet teeth of the ratchet gear, and the ratchet gear does not rotate synchronously with the pawl support shaft; the pawl support shaft is transmission connected to the reel or the pawl support shaft and the reel are integrally formed.

20. The roller blind according to claim 19, characterized in that When the curtain material is unrolled and wound, the displacement length of the transmission member is balanced to be consistent with the displacement length of the curtain material through the friction between the transmission member and the transmission wheel, and / or the friction between the reel and the transmission wheel, and / or the friction between the reel and the pawl support shaft.

21. The roller blind according to any one of claims 1 to 20, characterized in that: The rolling curtain also includes a power source, which is connected to the positioning roller and drives the positioning roller to rotate. After the positioning roller rotates, it drives the transmission member to rotate. The length limiting positioning member follows the transmission member, and the transmission member drives the one-way wheel assembly to rotate. The one-way wheel assembly drives the reel to rotate, thereby realizing the unwinding and / or winding of the curtain material.

22. The roller blind according to any one of claims 1 to 20, characterized in that The roller blind also includes a power source, which is arranged in the reel and drives the reel to rotate. The reel drives the one-way wheel assembly to rotate, and the one-way wheel assembly drives the transmission member to rotate. The length limiting positioning member rotates with the transmission member to achieve unwinding and / or winding of the blind material.

23. The roller blind according to any one of claims 1 to 20, characterized in that There is at least one of the length-limiting positioning member and the tensioning device.

24. The roller blind according to any one of claims 1 to 20, characterized in that The roller blind also includes a rigid transmission component, which includes a transmission rigid belt, a reversing pulley and a steering pulley. The two ends of the transmission rigid belt are fixedly connected to the two ends of the bottom rail through length-limiting positioning pieces. The transmission rigid belt extends along the outer edges of the transmission member, the reel and the bottom rail, and is turned at both ends of the reel through the steering pulley, and is reversed at one end of the bottom rail through the reversing pulley.

25. The roller blind according to claim 24, characterized in that The rolling curtain also includes a power source, which is connected to the positioning roller and drives the positioning roller to rotate. After the positioning roller rotates, it drives the transmission member to rotate. The length limiting positioning member rotates with the transmission member. The transmission member drives the one-way wheel assembly to rotate, and the one-way wheel assembly drives the reel to rotate, thereby realizing the unwinding and / or winding of the curtain material.

26. The roller blind according to claim 24, characterized in that The roller blind also includes a power source, which is arranged in the reel and drives the reel to rotate. The reel drives the one-way wheel assembly to rotate, and the one-way wheel assembly drives the transmission member to rotate. The length limiting positioning member rotates with the transmission member to achieve unwinding and / or winding of the blind material.

27. The roller blind according to any one of claims 1 to 19, characterized in that The one-way wheel assembly includes a transmission wheel and a gear shift assembly; the gear shift assembly includes n gear sets, which are the 1st gear set...the nth gear set in sequence, n>1; the one-way wheel assembly is configured as follows: the reel is transmission-connected to the gear set, the gear set is transmission-connected to the transmission wheel, and the rotation speed of the reel will cause the rotation speed of the transmission wheel to change after passing through the gear sets of different gears.

28. The roller blind according to claim 27, characterized in that The transmission wheel is annular, and its inner ring is provided with n rows of gear tracks matching with the n gear sets; the gear set includes at least two transmission-connected gears, namely a driving wheel and a driven wheel; the driving wheel is transmission-connected with the reel, and the driven wheel is arranged on the gear track; the diameters of the n rows of gear tracks are different and / or the diameters of the driving wheels in the n gear sets are different; the gear set is shifted on the gear track by a mountain bike shifting method, an electromagnet method or a servo method.

29. The roller blind according to any one of claims 1 to 19, characterized in that The one-way wheel assembly comprises a plurality of coaxially arranged sprockets with different diameters, each sprocket is connected to the reel, and the transmission member is a chain.

30. The roller blind according to any one of claims 1 to 18, characterized in that The one-way wheel assembly further comprises an auxiliary wheel and a transmission wheel. The auxiliary wheel is arranged below the transmission wheel. After the transmission member surrounds the transmission wheel, it also surrounds the auxiliary wheel. The transmission wheel drives the auxiliary wheel to rotate.

31. The roller blind according to any one of claims 1 to 20, characterized in that: The maximum diameter of the working part where the one-way wheel assembly cooperates with the transmission member is greater than the diameter of the outermost circle of the curtain material when the curtain material is fully retracted under the normal working state of the rolling curtain; the rolling curtain also includes a rigid transmission assembly, and the rigid transmission assembly includes a transmission rigid belt, a reversing pulley and a steering pulley. The two ends of the transmission rigid belt are fixedly connected to the two ends of the bottom rail through length-limiting positioning members. The transmission rigid belt extends along the outer edge of the transmission member, the reel and the bottom rail, and is turned at both ends of the reel through the steering pulley, and is reversed at one end of the bottom rail through the reversing pulley.

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