Curtain top rail and venetian blind

Abstract

The utility model provides a curtain top rail and a venetian blind, the curtain top rail comprises a top rail main body, a head and a pull bead guide piece, the pull bead guide piece is embedded on the top rail main body, and the pull bead guide piece and the head are clamped and fixed; end covers are arranged at the two ends of the top rail main body, the end covers are detachably connected with the top rail main body, a containing cavity is formed in the top rail main body, the two ends of the containing cavity are blocked through the end covers, and the brake head is arranged in the containing cavity. According to the curtain top rail and the curtain, the brake head is arranged in the containing cavity of the top rail, so that the left end and the right end of the top rail look more symmetrical in appearance, and meanwhile the curtain top rail and the curtain are not limited by installation space.

Description

Technical Field

[0001] This utility model relates to the field of sunshade curtain technology, and in particular to a curtain top track and Venetian blinds. Background Technology

[0002] Venetian blinds are made primarily of aluminum alloy, wood, and bamboo with a baked enamel finish. They are durable, easy to clean, non-aging, colorfast, provide sun shading, heat insulation, breathability, and fire resistance. They are suitable for high-end office buildings, residences, hotels, villas, and other places. Venetian blinds can be used to cover the openings of windows and doors to block light and maintain privacy.

[0003] With the development of the national economy, people's demands for quality of life are increasing day by day, and window covering products have also developed rapidly. Venetian blinds, as a product with rich light-adjusting and folding functions, are increasingly in demand. Their use is also very simple; people can raise or lower the blinds by pulling the cord. However, in the current technology, the control head (usually referring to the mechanical component that controls the raising, lowering, and folding of the Venetian blinds) is generally installed at one end of the blind track. From the product's appearance, this often results in an asymmetry between the left and right ends of the track, affecting the overall aesthetics of the blinds. At the same time, the control head, installed at one end of the track, occupies some extra space (i.e., protrudes somewhat). For small apartments or window areas with limited installation space, this protruding structure often prevents the blind track from being installed properly, causing inconvenience to the user. If the control head is not installed securely, it will also affect the overall stability of the blinds.

[0004] Therefore, it is necessary to improve upon existing technologies to provide a curtain top track and Venetian blinds with a more reasonable structural design. Utility Model Content

[0005] Based on this, this application provides a curtain top track and Venetian blinds with a more reasonable structural design.

[0006] To solve the above-mentioned technical problems, this utility model provides a curtain top track, including a top track body, a control head, and a bead pull guide. The bead pull guide is embedded in the top track body and is snapped and fixed to the control head. End caps are provided at both ends of the top track body, and the end caps are detachably connected to the top track body. A receiving cavity is provided inside the top track body, and the end caps seal both ends of the receiving cavity. The control head is placed inside the receiving cavity.

[0007] Preferably, limiting plates are provided on both sides of the inner wall of the top rail body, and the limiting plates extend along the length direction of the top rail body; the cutting head has a limiting part, and when the cutting head is placed in the receiving cavity, the limiting plate can cooperate with the limiting part to fix the cutting head.

[0008] Preferably, the cutting head includes a fixed base, and a ladder is provided on both sides of the fixed base. The limiting part is the ladder. When the cutting head is placed in the receiving cavity, the limiting plate can abut against the ladder to fix the cutting head.

[0009] Preferably, the control head has a first locking portion, and the bead guide has a second locking portion that cooperates with the first locking portion. When the bead guide is embedded in the top rail body, the second locking portion is located in the receiving cavity, and the bead guide and the control head can be locked together by the first locking portion and the second locking portion.

[0010] Preferably, the control head includes a fixed base, the first snap-fit ​​portion is disposed on the fixed base, and the pull bead guide is snapped and fixed to the fixed base by the first snap-fit ​​portion and the second snap-fit ​​portion; one of the first snap-fit ​​portion and the second snap-fit ​​portion is a slot and the other is a hook, and the hook can be snapped into the slot.

[0011] Preferably, the top rail is further provided with connectors at both ends, the connectors are detachably connected to the top rail, the top of the connector is provided with a limiting groove, the two ends of the limiting groove are provided with limiting baffles, the control head includes a fixed seat, the fixed seat has an extension plate extending toward the limiting groove, when the connector is connected to the top rail, the extension plate can extend into the limiting groove, and the two side walls of the extension plate abut against the limiting baffles.

[0012] Preferably, the top rail includes a front cover plate, a bottom plate, and a rear cover plate, which are sequentially connected to form the receiving cavity; the top end face of the front cover plate is higher than the top end face of the rear cover plate.

[0013] The front cover has a mounting groove at the top, which extends along the length of the front cover. A light-shielding strip is provided in the mounting groove, and at least part of the light-shielding strip can extend out of the mounting groove. The front cover, bottom plate and rear cover are integrally formed.

[0014] Preferably, the top rail includes a front cover plate, a bottom plate, and a rear cover plate connected in sequence. The bottom of the front cover plate and the rear cover plate are respectively provided with light-proof components along their length. One end of the light-proof component is connected to the front cover plate and the rear cover plate respectively, and the other end of the light-proof component extends upward and bends towards the bottom plate to form an arc portion. The arc portion cooperates with the bottom plate to form a light-blocking groove.

[0015] A Venetian blind includes a blind body and a transmission mechanism, and also includes a top rail as described in any of the preferred embodiments above, wherein the transmission mechanism is disposed within the receiving cavity, and a first end of the blind body is fixed to the top rail;

[0016] The control head includes a fixed base, a bead sprocket, and a bead. The bead sprocket is located inside the fixed base, and the bead is sleeved on the bead sprocket and can extend from the bead guide. The bead can drive the bead sprocket to rotate relative to the fixed base.

[0017] The transmission mechanism includes a transmission shaft and a winding device. The winding device is sleeved outside the transmission shaft. One end of the transmission shaft is connected to the bead chain wheel. The bead chain wheel can drive the transmission shaft to rotate. When the transmission shaft rotates, it can drive the winding device to rotate, so that the second end of the curtain moves closer to or away from the first end of the curtain.

[0018] The top rail is provided with light-proof components on both sides of the bottom. The light-proof components extend along the length of the top rail and cooperate with the top rail to form a light-blocking groove. The first end of the curtain is located in the light-blocking groove.

[0019] Preferably, the system further includes side rails, which are disposed at both ends of the bottom of the top rail, with the curtain body located between the two side rails; the top rail is provided with connectors at both ends, which engage with the top rail; the bottom of the connector is provided with a first insertion part, and the top of the side rail is provided with a second insertion part; the first insertion part and the second insertion part cooperate to fix the side rail to the top rail through the connectors; one of the first insertion part and the second insertion part is a slot, and the other is an insertion block.

[0020] The beneficial effects of this utility model are as follows: The curtain top track and curtain provided by this utility model, by embedding the head inside the receiving cavity of the top track, make the left and right ends of the top track look more symmetrical and more beautiful, and at the same time, it is not limited by the installation space. Attached Figure Description

[0021] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0022] Figure 1 This is an exploded structural diagram of the top track of the curtain in this utility model;

[0023] Figure 2 This is a three-dimensional structural diagram of the top curtain track in this utility model;

[0024] Figure 3 This is a side view of the top curtain track in this utility model.

[0025] Figure 4 This is a first-view structural diagram of the top rail body in this utility model;

[0026] Figure 5 This is a schematic diagram of the overall structure of the Venetian blinds in this utility model;

[0027] Figure 6 This is an exploded view of the Venetian blinds of this utility model;

[0028] Figure 7 for Figure 6 A partially enlarged structural diagram of part A in the middle;

[0029] Figure 8 This is a cross-sectional view of the Venetian blinds of this utility model.

[0030] Figure 9 This is a top view of the Venetian blind structure of this utility model;

[0031] In the figure: top rail body 1, receiving cavity 10, end cover 11, limiting plate 12, connector 13, limiting groove 130, limiting baffle 131, first insertion part 132, front cover plate 14, bottom plate 15, rear cover plate 16, mounting groove 140, light leakage prevention part 17, light blocking groove 170;

[0032] 2. Control head, 20. Fixing seat, 201. Limiting part / ladder platform, 202. First locking part, 203. Extension plate, 21. Bead sprocket, 22.

[0033] 3. Bead guide; 30. Second snap-fit ​​part; 4. Curtain body; 5. Transmission mechanism; 50. Transmission shaft; 51. Winding device; 6. Side rail; 60. Second plug-in part. Detailed Implementation

[0034] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings.

[0035] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0037] refer to Figure 1-9 This utility model provides a curtain top track, including a top track body 1, a control head 2, and a beaded guide 3. The beaded guide 3 is embedded in the top track body 1, and the beaded guide 3 is snapped and fixed with the control head 2. That is, after the beaded guide 3 is embedded in the top track body 1, it is snapped and fixed with the control head 2, thereby ensuring that the beaded guide 3 will not fall off. At the same time, the beaded guide 3 and the control head 2 also form a mutually restraining state, which not only ensures the stability of the beaded guide 3, but also improves the stability of the control head 2. The top track body 1 has end caps 11 at both ends, and the end caps 11 are detachably connected to the top track body 1 (specifically, they can be plugged in, snapped in, etc.), which facilitates the disassembly and maintenance of the components inside the top track, and also serves as a dustproof function. The top track body 1 has a receiving cavity 10, and the end caps 11 seal the two ends of the receiving cavity 10. The control head 2 is placed inside the receiving cavity 10.

[0038] Compared with the prior art, the curtain top track provided by this utility model, by embedding the head 2 inside the receiving cavity, can effectively hide the head 2, making the left and right ends of the top track more symmetrical in overall shape, thus bringing a more aesthetically pleasing experience to consumers; secondly, by embedding the head 2 inside, the installation process of the top track is more convenient, and the installation will no longer be restricted due to one end being too protruding.

[0039] In a preferred embodiment, limiting plates 12 are respectively provided on both sides of the inner wall of the top rail body 1, and the limiting plates 12 extend along the length direction of the top rail body 1; the cutting head 2 has a limiting part 201. When the cutting head 2 is placed in the receiving cavity 10, the limiting plate 12 can cooperate with the limiting part 201 to fix the cutting head 2, thereby preventing the cutting head 2 from shifting longitudinally. That is, when the cutting head 2 is placed in the receiving cavity 10, the cutting head 2 cannot move up and down under the cooperation of the limiting plate 12 and the limiting part 201. In addition, after the aforementioned pull bead guide 3 is engaged with the cutting head 2, the limiting plate 12 can be relatively fixed in a specific position, thereby ensuring its stability in the receiving cavity 10.

[0040] In a preferred embodiment, the head 2 includes a fixed base 20, and a ladder 201 is provided on both sides of the fixed base 20. The limiting part 201 is a ladder 201. When the head 2 is placed in the receiving cavity 10, the limiting plate 12 can abut against the ladder 201. Here, abutting means that the limiting plate 12 and the ladder 201 are in a state of relative abutting, so as to fix the head 2 and limit the head 2.

[0041] In a preferred embodiment, the control head 2 has a first engaging portion 202, and the bead pull guide 3 has a second engaging portion 30 that cooperates with the first engaging portion 202. When the bead pull guide 3 is embedded in the top rail body 1, the second engaging portion 30 is located within the receiving cavity 10, and the bead pull guide 3 and the control head 2 can be mutually engaged through the first engaging portion 202 and the second engaging portion 30. In this embodiment, after the bead pull guide 3 is embedded in the top rail body 1, in order to ensure the stability of the bead pull guide 3, the first engaging portion 202 and the second engaging portion 30 cooperate to further engage the bead pull guide 3 with the control head 2, preventing the bead pull guide 3 from falling off and improving stability.

[0042] In a preferred embodiment, the control head 2 includes a fixed base 20, and a first snap-fit ​​portion 202 is disposed on the fixed base 20. The pull-bead guide 3 is snapped and fixed to the fixed base 20 via the first snap-fit ​​portion 202 and the second snap-fit ​​portion 30. One of the first snap-fit ​​portion 202 and the second snap-fit ​​portion 30 is a slot, and the other is a hook, which can be snapped into the slot. Through the cooperation of the hook and the slot, the fixed base 20 and the pull-bead guide 3 are quickly assembled, and a stable connection is formed between the two, while ensuring the overall stability of the control head 2 and the pull-bead guide 3.

[0043] In a preferred embodiment, connectors 13 are also provided at both ends of the top rail. The connectors 13 are detachably connected to the top rail (e.g., by plugging / clamping). For example, when using the plugging method, slots are provided at both ends of the top rail, and plugging blocks are provided on the connectors 13. The plugging blocks can be inserted into the slots to fix the connectors 13 to the top rail, thus facilitating the assembly and disassembly of the connectors 13. A limiting groove 130 is provided at the top of the connectors 13, and limiting baffles 131 are provided at both ends of the limiting groove 130. The head 2 includes a fixing seat 20, and the fixing seat 20 has an extension plate 203 extending toward the limiting groove 130. When the connectors 13 are clamped to the top rail, the extension plate 203 can extend into the limiting groove 130, and the two side walls of the extension plate 203 abut against the limiting baffles 131. During installation, the connectors 13 can be clamped to the top rail body 1 first, so that the extension plate 203 of the head 2 is inserted into the limiting groove 130, as shown in the reference. Figure 2Because the cutting head 2 is limited by the limiting plate 12 at the top and the connecting piece 13 at the bottom, and is also engaged with the pull bead guide 3, the cutting head 2 will not experience longitudinal or lateral displacement when it is located in the receiving cavity 10, resulting in better overall stability. Then, the end caps 11 are sealed at both ends of the receiving cavity 10, concealing the cutting head 2 and the connecting piece 13 within the receiving cavity 10 for a more aesthetically pleasing appearance.

[0044] In a preferred embodiment, the top rail includes a front cover plate 14, a bottom plate 15, and a rear cover plate 16, which are sequentially connected to form a receiving cavity 10. The top end face of the front cover plate 14 is higher than the top end face of the rear cover plate 16, and the front cover plate 14, bottom plate 15, and rear cover plate 16 are integrally formed. The front cover plate 14 mainly refers to the side facing the user, while the side facing away from the user is the rear cover plate 16. This design, with the front cover plate 14 higher than the rear cover plate 16, creates a height difference, allowing the front cover plate 14 to better block light from behind, resulting in better overall light-blocking performance of the curtains. Furthermore, this height difference prevents the curtain mounting brackets from being exposed and affecting the user's viewing experience.

[0045] Furthermore, a mounting groove 140 is provided at the top of the front cover panel 14, extending along the length of the front cover panel 14. A light-blocking strip (not shown, such as a brush strip) is provided within the mounting groove 140, with at least a portion of the light-blocking strip extending out of the mounting groove 140. By further installing a light-blocking strip at the top of the front cover panel 14, the light-blocking strip can serve as a dust-proof element, and also further improves the light-blocking performance of the curtain.

[0046] In a preferred embodiment, the top rail includes a front cover plate 14, a bottom plate 15, and a rear cover plate 16 connected in sequence. The bottom of the front cover plate 14 and the rear cover plate 16 are respectively provided with light-blocking components 17 along their length. One end of the light-blocking component 17 is connected to the front cover plate 14 and the rear cover plate 16 respectively, and the other end of the light-blocking component 17 extends upward and bends towards the bottom plate 15 to form an arc. The arc and the bottom plate 15 cooperate to form a light-blocking groove 170. In this embodiment, the arc and the bottom plate 15 cooperate to form a semi-enclosed light-blocking groove 170, which is used to accommodate the first end of the curtain 4 (the first end mainly refers to the top of the curtain 4 relatively close to the top rail, not just the first leaf at the top of the curtain 4; that is, there may be multiple leaves at the top that are located within the light-blocking groove 170). This allows the gap between the top of the curtain 4 and the top rail to be blocked by the light-blocking component 17, preventing light leakage. The arc design also makes the overall appearance of the curtain more aesthetically pleasing. The light-blocking component 17 and the top rail body 1 can be integrally molded to ensure overall strength; or they can be detachable to facilitate the replacement of light-blocking components 17 of different shapes.

[0047] In other embodiments, the light-blocking component 17 is respectively disposed at the bottom of the front cover plate 14 and the rear cover plate 16, and extends vertically downward relative to the front cover plate 14 and the rear cover plate 16, which can also achieve the effect of forming a light-blocking groove 170 between it and the base plate 15. Of course, other methods besides these two embodiments are not excluded to achieve the same effect.

[0048] A Venetian blind includes a curtain body 4 and a transmission mechanism 5, and also includes a top rail as described in any of the preferred embodiments above. The transmission mechanism 5 is disposed in a receiving cavity 10, and the first end of the curtain body 4 is fixed to the top rail.

[0049] The control head 2 includes a fixed base 20, a bead sprocket 21, and a bead 22. The bead sprocket 21 is located inside the fixed base 20, and the bead 22 is sleeved on the bead sprocket 21 and can extend out from the bead guide 3. Specifically, the bead guide 3 has two openings, and the two ends of the bead 22 can extend out from the two openings respectively. The bead 22 can drive the bead sprocket 21 to rotate relative to the fixed base 20. In use, the user can easily drive the bead sprocket 21 to rotate by pulling the bead 22.

[0050] The transmission mechanism 5 includes a transmission shaft 50 and a winding device 51. The winding device 51 is sleeved on the outside of the transmission shaft 50. One end of the transmission shaft 50 is connected to the bead chain wheel 21. The bead chain wheel 22 can drive the transmission shaft 50 to rotate through the bead chain wheel 21. When the transmission shaft 50 rotates, it can drive the winding device 51 to rotate, so that the second end of the curtain 4 (i.e. the end away from the top rail) moves closer to or away from the first end of the curtain 4, thereby causing the curtain 4 to be retracted or unfolded relative to the top rail body 1.

[0051] The bottom sides of the top rail are provided with light-blocking components 17. The light-blocking components 17 extend along the length of the top rail. The light-blocking components 17 and the top rail cooperate to form a light-blocking groove 170. The first end of the curtain 4 is located in the light-blocking groove 170, which can prevent light leakage caused by the gap between the top of the curtain 4 and the top rail.

[0052] In a preferred embodiment, the system further includes side rails 6, which are located at both ends of the bottom of the top rail. The curtain body 4 is situated between the two side rails 6. The side edges of the curtain body 4 can be concealed by the side rails 6, effectively reducing the possibility of light leakage from the edges of the curtain and thus improving the overall light-blocking performance of the curtain. Connectors 13 are provided at both ends of the top rail, engaging with it. A first insertion part 132 is provided at the bottom of the connector 13, and a second insertion part 60 is provided at the top of the side rail 6. The first insertion part 132 and the second insertion part 60 cooperate to fix the side rail 6 to the top rail via the connectors 13. One of the first insertion part 132 and the second insertion part 60 is a slot, and the other is a plug. By inserting the plug into the slot, quick installation between the side rail 6 and the connector 13 can be achieved, thereby improving assembly efficiency. In this embodiment, from a cross-sectional perspective, the side rail 6 is roughly U-shaped, and the two sides of the curtain 4 are wrapped inside the opening of the U-shaped side rail 6; the cross-section of the connecting seat is also roughly adapted to the side rail 6, and multiple slots and plug blocks can be provided along the length and width directions of the side rail 6 or the connecting seat, thereby improving the overall stability performance after assembly.

[0053] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A curtain top track, characterized in that, The device includes a top rail body, a control head, and a bead guide. The bead guide is embedded in the top rail body and is snapped and fixed to the control head. The top rail body has end caps at both ends, which are detachably connected to the top rail body. The top rail body has a receiving cavity inside, and the end caps seal both ends of the receiving cavity. The control head is placed inside the receiving cavity.

2. The curtain top track as described in claim 1, characterized in that, Limiting plates are respectively provided on both sides of the inner wall of the top rail body, and the limiting plates extend along the length direction of the top rail body; the cutting head has a limiting part, and when the cutting head is placed in the receiving cavity, the limiting plate can cooperate with the limiting part to fix the cutting head.

3. The curtain top track as described in claim 2, characterized in that, The cutting head includes a fixed base, and a ladder is provided on both sides of the fixed base. The limiting part is the ladder. When the cutting head is placed in the receiving cavity, the limiting plate can abut against the ladder to fix the cutting head.

4. The curtain top track as described in claim 1, characterized in that, The control head has a first locking portion, and the bead guide has a second locking portion that cooperates with the first locking portion. When the bead guide is embedded in the top rail body, the second locking portion is located in the receiving cavity, and the bead guide and the control head are mutually locked together through the first locking portion and the second locking portion.

5. The curtain top track as described in claim 4, characterized in that, The control head includes a fixed base, and the first snap-fit ​​part is disposed on the fixed base. The pull bead guide is snapped and fixed to the fixed base by the first snap-fit ​​part and the second snap-fit ​​part. One of the first snap-fit ​​part and the second snap-fit ​​part is a slot and the other is a hook. The hook can be snapped into the slot.

6. The curtain top track as described in claim 1, characterized in that, The top rail is also provided with connectors at both ends. The connectors are detachably connected to the top rail. The top of the connector is provided with a limiting groove. The limiting groove has limiting baffles at both ends. The control head includes a fixed seat. The fixed seat has an extension plate extending toward the limiting groove. When the connector is connected to the top rail, the extension plate can extend into the limiting groove. The two side walls of the extension plate abut against the limiting baffles.

7. The curtain top track as described in claim 1, characterized in that, The top rail includes a front cover plate, a bottom plate, and a rear cover plate, which are sequentially connected to form the receiving cavity; the top end face of the front cover plate is higher than the top end face of the rear cover plate. The front cover has a mounting groove at the top, which extends along the length of the front cover. A light-shielding strip is provided in the mounting groove, and at least part of the light-shielding strip can extend out of the mounting groove. The front cover, bottom plate and rear cover are integrally formed.

8. The curtain top track as described in claim 1, characterized in that, The top rail includes a front cover plate, a bottom plate, and a rear cover plate connected in sequence. The bottom of the front cover plate and the rear cover plate are respectively provided with light-proof components along their length. One end of the light-proof component is connected to the front cover plate and the rear cover plate respectively. The other end of the light-proof component extends upward and bends towards the bottom plate to form an arc. The arc cooperates with the bottom plate to form a light-blocking groove.

9. A type of Venetian blind, characterized in that, The system includes a curtain body and a transmission mechanism, and also includes a top rail as described in any one of claims 1-8, wherein the transmission mechanism is disposed within the receiving cavity, and the first end of the curtain body is fixed to the top rail; The control head includes a fixed base, a bead sprocket, and a bead. The bead sprocket is located inside the fixed base, and the bead is sleeved on the bead sprocket and can extend from the bead guide. The bead can drive the bead sprocket to rotate relative to the fixed base. The transmission mechanism includes a transmission shaft and a winding device. The winding device is sleeved outside the transmission shaft. One end of the transmission shaft is connected to the bead chain wheel. The bead chain wheel can drive the transmission shaft to rotate. When the transmission shaft rotates, it can drive the winding device to rotate, so that the second end of the curtain moves closer to or away from the first end of the curtain. The top rail is provided with light-proof components on both sides of the bottom. The light-proof components extend along the length of the top rail and cooperate with the top rail to form a light-blocking groove. The first end of the curtain is located in the light-blocking groove.

10. The Venetian blind as described in claim 9, characterized in that, It also includes side rails, which are disposed at both ends of the bottom of the top rail, and the curtain body is located between the two side rails; the top rail is provided with connectors at both ends, the connectors are engaged with the top rail, the bottom of the connectors is provided with a first insertion part, and the top of the side rails is provided with a second insertion part, the first insertion part and the second insertion part cooperate to fix the side rails to the top rails through the connectors; one of the first insertion part and the second insertion part is a slot and the other is an insertion block.

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