Manual shutter

Abstract

The utility model discloses a manual shutter which comprises a shutter frame, a shutter sash and a window opener, and the window opener comprises a shell arranged in the shutter frame; the push rod is sleeved in the shell in an up-down moving manner, and the upper end of the push rod extends out of the shell, is connected with the louver fan through a connecting rod assembly and is used for driving the louver fan to rotate to open and close; the upper portion of the hand-driven rod extends into the shell to be connected with the lower end of the push rod, and the lower portion of the hand-driven rod extends downwards to form the shutter frame and is used for being held by a user to drive the push rod to move up and down. According to the manual louver, the louver higher than the ground can be manually opened, a power supply is not needed, opening and closing are convenient, and the cost is low.

Description

Technical Field

[0001] This utility model relates to the field of venetian blind technology, and more specifically, to a manual venetian blind. Background Technology

[0002] In the case of blinds that are high off the ground and cannot be opened by hand, electric push-shaft type blind openers are usually used to open or close the blinds. However, the blinds cannot be opened or closed in the event of a power outage, and electric blinds are also more expensive.

[0003] Therefore, how to provide a manual louver that requires no power supply, is easy to open and close, and is low in cost is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a manual venetian blind that can be manually opened from a height above the ground, requires no power supply, is easy to open and close, and is low in cost.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A manual venetian blind includes a venetian frame, venetian sashes, and a window opener, the window opener comprising:

[0007] The outer casing is located within the louvered frame;

[0008] A push rod is movable up and down and is fitted inside the housing. The upper end of the push rod extends out of the housing and is connected to the louver fan through a connecting rod assembly, so as to drive the louver fan to rotate and open and close.

[0009] A hand-operated lever, the upper part of which extends into the housing and connects to the lower end of the push rod, and the lower part of the hand-operated lever extends downward out of the louvered frame for the user to hold and drive the push rod to move up and down.

[0010] Preferably, the hand-driven rod includes a threaded screw and a hand crank. The threaded screw is rotatably sleeved inside the housing. A nut is sleeved on the threaded screw and threadedly connected to the outer wall of the lower end of the push rod. The push rod has a through hole for the threaded screw to be inserted. The lower end of the threaded screw extends out of the housing and connects to the downwardly extending hand crank.

[0011] Preferably, the upper end of the outer casing is provided with an upper end cover that is sleeved on the push rod and has a clearance fit, and the lower end of the outer casing is provided with a lower end cover that is sleeved on the threaded screw and has a threaded fit.

[0012] Preferably, the inner wall of the outer casing adjacent to the lower end cover is provided with an annular groove, and a thrust ball bearing sleeved on the threaded screw is provided in the annular groove.

[0013] Preferably, the hand-drive lever further includes a connecting shaft, the upper end of which is rotatably connected to the lower end of the threaded screw via an upper rotating shaft, and the lower end of which is rotatably connected to the hand crank via a lower rotating shaft, wherein the upper rotating shaft and the lower rotating shaft are perpendicular to each other.

[0014] Preferably, the hand crank includes a vertical bar and a horizontal bar. One end of the vertical bar is rotatably connected to the connecting shaft, and the other end extends downward in the vertical direction and is connected to the first handle sleeve. One end of the horizontal bar is connected to the first handle sleeve, and the other end extends out of the louvered frame in the horizontal direction and is connected to the second handle sleeve.

[0015] Preferably, the linkage assembly is provided in two sets, and the two sets of linkage assemblies are respectively provided on both sides of the louver frame. Each set of linkage assemblies includes several supports and connecting rods. The several supports are rotatably provided on the inner wall of the louver frame at intervals in the vertical direction and are rotatably connected to the vertical connecting rods. The connecting rod in any set of linkage assemblies is connected to the upper end of the push rod. The several supports in the two sets of linkage assemblies are arranged one-to-one in the horizontal direction, and the two corresponding supports are used to support the louver fan.

[0016] Preferably, the outer casing is mounted on the inner wall of the louvered frame via a fixed bracket, the upper end of the push rod is connected to the connecting rod via a movable bracket, and the fixed bracket and the movable bracket are located on the same side.

[0017] Preferably, the support has legs on both sides at one end, one leg is rotatably connected to the connecting rod, and the other leg is suspended in the air.

[0018] Preferably, the louvered frame is provided with slots extending along a vertical distribution path of a plurality of the supports, the supports are provided with grooves inside, one end of the support rod is rotatably connected to the slots, and the other end is rotatably connected to the grooves.

[0019] The manual blinds provided by this utility model have a louver frame extending downwards from the lower part of the hand drive rod. When the blinds are high off the ground, it is convenient for the user to hold the hand drive rod and drive the push rod to move up and down. Since the push rod is connected to the louver fan through the linkage assembly, the up and down movement of the push rod can drive the louver fan to rotate up and down, so as to realize the opening and closing of the louver fan in the absence of power, and save energy and reduce costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of a manual louver provided by this utility model;

[0022] Figure 2 A schematic diagram of the window opener provided by this utility model;

[0023] Figure 3 This is a partial cross-sectional view of the window opener provided by this utility model;

[0024] Figure 4 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 5 for Figure 2 A magnified view of a section at point B in the middle;

[0026] Figure 6 A partial structural schematic diagram of the manual louver provided by this utility model;

[0027] Figure 7 for Figure 6 A magnified view of a section at point C;

[0028] Figure 8 This is a schematic diagram of the support provided by this utility model.

[0029] Figure label:

[0030] 1-Venetian louver frame; 2-Venetian louver; 3-Window opener; 4-Linkage assembly;

[0031] 11-slot;

[0032] 31-Outer casing; 311-Upper end cover; 312-Lower end cover; 313-Thrust ball bearing;

[0033] 32 - Push rod; 321 - Push head;

[0034] 33-Hand drive lever; 331-Threaded screw; 332-Hand crank; 333-Threaded nut; 334-Connecting shaft; 335-Upper rotating shaft; 336-Lower rotating shaft; 3321-Vertical lever; 3322-Horizontal lever; 3323-First handle sleeve; 3324-Second handle sleeve;

[0035] 34-Fixed bracket;

[0036] 35-Modible support;

[0037] 41-Support; 42-Connecting rod; 43-Support leg; 44-Support rod; 45-First pivot; 46-Third pivot. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] The core of this utility model is to provide a manual venetian blind that can be manually opened from a height above the ground. It requires no power supply, is easy to open and close, and is low in cost.

[0040] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0041] Please refer to Figure 1 and Figure 2 This application provides a manual louver, including a louver frame 1, louver sash 2, and a louver opener 3. The louver opener 3 includes a housing 31, a push rod 32, and a hand-operated rod 33. The housing 31 is located inside the louver frame 1. The push rod 32 is movably mounted inside the housing 31, and its upper end extends out of the housing 31 and is connected to the louver sash 2 via a connecting rod assembly 4, for driving the louver sash 2 to rotate and open / close. The upper part of the hand-operated rod 33 extends into the housing 31 and is connected to the lower end of the push rod 32. The lower part of the hand-operated rod 33 extends downward out of the louver frame 1 for the user to hold and drive the push rod 32 to move up and down.

[0042] Specifically, the outer casing 31 is mounted inside the louver frame 1 via a fixed bracket 34. The upper part of the hand-drive rod 33 extends into the outer casing 31 and connects to the lower end of the push rod 32. The lower part of the hand-drive rod 33 extends out of the louver frame 1, allowing the user to hold the hand-drive rod 33 and push the push rod 32 up and down. The upper end of the push rod 32 extends out of the outer casing 31 and connects to the louver fan 2 via the connecting rod assembly 4. Thus, pushing the push rod 32 up and down can drive the louver fan 2 to rotate up and down through the connecting rod assembly 4, thereby achieving rotational opening and closing. Preferably, the outer casing 31 extends vertically, and the portions of the outer casing 31, the push rod 32, and the hand-drive rod 33 that extend into the outer casing 31 (i.e., the upper part of the hand-drive rod 33) are coaxially arranged. Vertical transmission can save space, reduce resistance and wear, and improve the stability of the opening and closing of the louver fan 2.

[0043] Therefore, when the louvers are high off the ground, the user can hold the drive rod 33 to drive the push rod 32 to move up and down. Since the push rod 32 is connected to the louver 2 through the linkage assembly 4, the up and down movement of the push rod 32 can drive the louver 2 to rotate up and down, so as to open and close the louver 2 without power, and save energy and reduce costs.

[0044] For the specific settings of the hand-drive lever 33, please refer to the above embodiment. Figure 2 and Figure 3 The hand-operated lever 33 includes a threaded screw 331 and a hand crank 332. The threaded screw 331 is rotatably sleeved inside the housing 31. A nut 333 is sleeved on the threaded screw 331 and threadedly connected to the outer wall of the lower end of the push rod 32. The push rod 32 has a through hole for the threaded screw 331 to be inserted. The lower end of the threaded screw 331 extends out of the housing 31 and connects to the downwardly extending hand crank 332.

[0045] Specifically, the upper part of the hand-drive lever 33 is the threaded screw 331, and the lower part is the hand crank 332. The threaded screw 331 is rotatably mounted inside the housing 31 via a thrust ball bearing 313, and the lower end of the threaded screw 331 extends out of the housing 31 and connects to the downwardly extending hand crank 332. Rotating the hand crank 332 can drive the threaded screw 331 to rotate. It is easy to see that the outer wall of the threaded screw 331 has external threads, and the inner wall of the nut 333 has internal threads. The nut 333 is fitted onto the threaded screw 331, and the external and internal threads are connected and engaged. Rotating the threaded screw 331 can drive the nut 333 to move up and down along the threaded screw 331. Therefore, the internal thread at the lower end of the nut 333 engages with the external thread of the threaded rod 331, and the internal thread at the upper end of the nut 333 engages with the external thread at the lower end of the push rod 32. This allows the push rod 32 to move up and down on the threaded rod 331 via the nut 333, enabling the threaded rod 331 to be rotated to push out or pull in the push rod 32. It should be noted that the push rod 32 has a through hole with a diameter larger than that of the threaded rod 331, allowing the threaded rod 331 to be inserted into the push rod 32, thus allowing the push rod 32 to be fitted around the outer circumference of the threaded rod 331.

[0046] The aforementioned hand-drive rod 33 uses a threaded screw 331 and a screw nut 333 to convert the rotational motion of the hand crank 332 into linear motion, thereby driving the push rod 32 to move up and down. This driving method has smooth motion, high transmission efficiency and low cost, and also has a compact structure that saves vertical space.

[0047] To ensure the safe operation of the window opener 3, please refer to the following based on the above embodiment: Figure 3 The upper end of the outer casing 31 is provided with an upper end cover 311 that is sleeved on the push rod 32 and has a clearance fit, and the lower end of the outer casing 31 is provided with a lower end cover 312 that is sleeved on the threaded screw 331 and has a threaded fit.

[0048] Specifically, the upper end cover 311 has external threads and screws into the upper end of the outer shell 31, connecting with its internal threads. The lower end cover 312 has external threads and screws into the lower end of the outer shell 31, connecting with its internal threads. Thus, both ends of the outer shell 31 are covered with end covers, preventing external impurities from falling into the outer shell 31 and ensuring the normal operation of the components inside the outer shell 31, thereby ensuring the safe operation of the window opener 3. In addition, the upper end cover 311 has an upper through hole for the push rod 32 to pass through, and the outer wall of the push rod 32 is clearance-fitted with the upper through hole to avoid obstructing the up and down movement of the push rod 32. The lower end cover 312 has a lower through hole for the threaded rod 331 to pass through, and the outer wall of the threaded rod 331 is threadedly connected to the lower through hole. This allows the lower end cover 312 to support the threaded rod 331, ensuring the stable rotation of the threaded rod 331 and further ensuring the safe operation of the window opener 3.

[0049] Regarding the specific configuration of the thrust ball bearing 313, please refer to the above embodiment. Figure 3 The inner wall of the outer casing 31 near the lower end cover 312 is provided with an annular groove, and a thrust ball bearing 313 sleeved on the threaded screw 331 is provided in the annular groove.

[0050] It is understandable that the thrust bearing is installed in the annular groove, which prevents the thrust bearing from being pushed out with the rotation of the threaded screw 331, thus limiting the axial displacement of the thrust bearing. Furthermore, the thrust bearing is located near the lower end cover 312, which can avoid the phenomenon of obstructing the movement of the nut 333 on the threaded screw 331.

[0051] To improve the operational flexibility of the hand crank 332, please refer to the following based on the above embodiment: Figure 2 and Figure 5 The hand-operated lever 33 also includes a connecting shaft 334. The upper end of the connecting shaft 334 is rotatably connected to the lower end of the threaded screw 331 via an upper rotating shaft 335. The threaded screw 331 can rotate around the upper rotating shaft 335. The lower end of the connecting shaft 334 is rotatably connected to the hand crank 332 via a lower rotating shaft 336. The hand crank 332 can rotate around the lower rotating shaft 336, thereby enabling the threaded screw 331 and the hand crank 332 to rotate in space with a high degree of freedom. Power can be transmitted between the two at multiple angles, allowing the hand crank 332 to achieve complex motion trajectories and actions relative to the threaded screw 331, which is beneficial to improving the flexibility of the hand crank 332 operation. It should be noted that the upper rotating shaft 335 and the lower rotating shaft 336 are perpendicular to each other, which ensures effective power transmission between the hand crank 332 and the threaded screw 331.

[0052] For specific settings of the hand crank 332, please refer to the above embodiment. Figure 2 The hand crank 332 includes a vertical bar 3321 and a horizontal bar 3322. One end of the vertical bar 3321 is rotatably connected to the connecting shaft 334, and the other end extends downward in the vertical direction and is connected to the first handle sleeve 3323. One end of the horizontal bar 3322 is connected to the first handle sleeve 3323, and the other end extends out of the louvered frame 1 in the horizontal direction and is connected to the second handle sleeve 3324.

[0053] Understandably, the hand crank 332 consists of a vertically extending vertical rod 3321 and a horizontally extending horizontal rod 3322, which can save the installation space of the hand crank 332 within the louvered frame 1. The lower end of the vertical rod 3321 has a first handle sleeve 3323, and the part of the horizontal rod 3322 extending out of the louvered frame 1 has a second handle sleeve 3324. The user can choose to hold either handle sleeve, which can improve the convenience of operating the hand crank 332 and also improve the user's grip and reduce friction.

[0054] Regarding the specific transmission connection between push rod 32 and louvered fan 2, please refer to the above embodiment. Figure 6 and Figure 7The linkage assembly 4 is set in two groups, and the two groups of linkage assemblies 4 are respectively set on both sides of the louver frame 1. Each group of linkage assembly 4 includes several supports 41 and connecting rods 42. Several supports 41 are rotatably set on the inner wall of the louver frame 1 at intervals in the vertical direction and are rotatably connected to the vertical connecting rods 42. The connecting rods 42 in any group of linkage assembly 4 are connected to the upper end of the push rod 32. Several supports 41 in the two groups of linkage assembly 4 are set one-to-one in the horizontal direction. The two corresponding supports 41 are used to support the louver fan 2. That is to say, both sides of the louver fan 2 are fixed to the two supports 41 located in the same horizontal direction by bolts.

[0055] In this way, when push rod 32 moves upward, it causes connecting rod 42 to move upward. Since several supports 41 are rotatably connected to connecting rod 42, connecting rod 42 can cause several supports 41 to rotate downward, thereby causing several louvered fans 2 to rotate downward and close, so as to close the louvers. Conversely, when push rod 32 moves downward, it causes connecting rod 42 to move downward. Connecting rod 42 can cause several supports 41 to rotate upward, thereby causing several louvered fans 2 to rotate upward and open, so as to open the louvers.

[0056] It should also be noted that the push rod 32 and the louver 2 are driven by the linkage assembly 4 with the above-mentioned structure. The louver 2 can be rotated and opened and closed by using one window opener 3 to drive a set of linkage assemblies 4. The structure is simple and the cost is low. Moreover, the use of two sets of linkage assemblies 4 to support the louver 2 can improve the stability of the overall structure.

[0057] Regarding the specific installation method of the housing 31 and the connecting rod 42, please refer to the above embodiment. Figure 4 The outer casing 31 is mounted on the inner wall of the louver frame 1 via a fixed bracket 34. The upper end of the push rod 32 is connected to the connecting rod 42 via a movable bracket 35, with the fixed bracket 34 and the movable bracket 35 located on the same side. Therefore, regardless of whether the louver is open or closed, the window opener 3 and the connecting rod 42 connected to its push rod 32 are located on the same side inside the louver frame 1, allowing the window opener 3 and the connecting rod assembly 4 to be compactly arranged in the width direction of the louver frame 1, thus reducing the width dimension of the louver frame 1. It should be noted that the two sides of the louver frame 1 refer to the two sides of the louver frame 1 along its length direction. The louver sash 2 is arranged along the length direction of the louver frame 1, and the width direction of the louver frame 1 is the direction perpendicular to the length of the louver sash 2 (or the louver frame 1).

[0058] Optional, please refer to Figure 3 The upper end of the push rod 32 is provided with a push head 321. Specifically, the external thread of the push head 321 is connected to the internal thread of the upper end of the push rod 32, so that the push head 321 is screwed into the upper end of the push rod 32. The push head 321 is connected to the movable fixed seat by bolts to facilitate the connection between the push rod 32 and the movable fixed seat.

[0059] Regarding the specific connection method between support 41 and connecting rod 42, please refer to the above embodiment. Figure 7 and Figure 8 The support 41 has two legs 43 on both sides of one end. One leg 43 is rotatably connected to the connecting rod 42, while the other leg 43 is suspended. Thus, the two legs 43 are respectively set on both sides of the end of the support 41, which can balance the structure of the support 41 and ensure the stability of the structure of the support 41. At the same time, one leg 43 is connected to the connecting rod 42 through the first rotating shaft 45, realizing the rotatable connection between the support 41 and the connecting rod 42.

[0060] Regarding the specific rotational arrangement of the support 41 on the louvered frame 1, please refer to the above embodiment. Figure 7 and Figure 8 The louvered frame 1 is provided with slots 11 extending along a vertical distribution path of several supports 41. The supports 41 are provided with grooves inside. One end of the support rod 44 is connected to the slot 11 through a second rotating shaft, and the other end is connected to the groove through a third rotating shaft 46, thereby enabling the supports 41 to be rotatably set in the louvered frame 1.

[0061] It should be particularly noted that in the above structure, the support leg 43, support rod 44, and connecting rod 42 on the support 41 form a triangular connecting rod 42 transmission structure. This triangular connecting rod 42 transmission structure has high stability and high transmission efficiency, and can drive the fan blades to rotate and open and close smoothly and efficiently. In addition, the two ends of the support rod 44 are respectively inserted into the slot 11 of the louver frame 1 and the groove inside the support 41, which allows the support 41 to be compactly set with the louver frame 1, further reducing the width of the louver frame 1.

[0062] For preferred options, please refer to [the following]. Figure 7 The first rotating shaft 45, the second rotating shaft (not shown in the figure) and the third rotating shaft 46 are parallel to each other, and the two support legs 43 are arranged horizontally on both sides of the end of the support 41. This can prevent the support 41 from shifting when it rotates and improve the smoothness of the louver fan 2 opening and closing.

[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The manual louver provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A manually operated venetian blind, characterized in that, Includes a louver frame (1), louver sashes (2), and a window opener (3), wherein the window opener (3) includes: The outer casing (31) is located inside the louvered frame (1); The push rod (32) can be moved up and down and is sleeved inside the outer shell (31). The upper end of the push rod (32) extends out of the outer shell (31) and is connected to the louver fan (2) through the connecting rod assembly (4) to drive the louver fan (2) to rotate and open and close. The upper part of the hand-drive lever (33) extends into the housing (31) and connects to the lower end of the push rod (32). The lower part of the hand-drive lever (33) extends downward out of the louvered frame (1) for the user to hold and drive the push rod (32) to move up and down.

2. The manual venetian blind according to claim 1, characterized in that, The hand-driven lever (33) includes a threaded screw (331) and a hand crank (332). The threaded screw (331) is rotatably sleeved inside the housing (31). A nut (333) is sleeved on the threaded screw (331) and threadedly connected to the lower outer wall of the push rod (32). The push rod (32) has a through hole for the threaded screw (331) to be inserted. The lower end of the threaded screw (331) extends out of the housing (31) and connects to the downwardly extending hand crank (332).

3. The manual venetian blind according to claim 2, characterized in that, The upper end of the outer shell (31) is provided with an upper end cover (311) that is sleeved on the push rod (32) and has a clearance fit, and the lower end of the outer shell (31) is provided with a lower end cover (312) that is sleeved on the threaded screw (331) and has a thread fit.

4. The manual venetian blind according to claim 3, characterized in that, The inner wall of the outer casing (31) adjacent to the lower end cover (312) is provided with an annular groove, and a thrust ball bearing (313) sleeved on the threaded screw (331) is provided in the annular groove.

5. The manual venetian blind according to claim 2, characterized in that, The hand-drive lever (33) also includes a connecting shaft (334), the upper end of which is rotatably connected to the lower end of the threaded screw (331) via an upper rotating shaft (335), and the lower end of which is rotatably connected to the hand crank (332) via a lower rotating shaft (336), and the upper rotating shaft (335) and the lower rotating shaft (336) are perpendicular to each other.

6. The manual venetian blind according to claim 5, characterized in that, The hand crank (332) includes a vertical bar (3321) and a horizontal bar (3322). One end of the vertical bar (3321) is rotatably connected to the connecting shaft (334), and the other end extends downward in the vertical direction and is connected to the first handle sleeve (3323). One end of the horizontal bar (3322) is connected to the first handle sleeve (3323), and the other end extends out of the louvered frame (1) in the horizontal direction and is connected to the second handle sleeve (3324).

7. The manual venetian blind according to any one of claims 1 to 6, characterized in that, The connecting rod assembly (4) is set in two groups, and the two groups of connecting rod assemblies (4) are respectively set on both sides of the louver frame (1). Each group of connecting rod assemblies (4) includes several supports (41) and connecting rods (42). Several supports (41) are rotatably set on the inner wall of the louver frame (1) in the vertical direction and are rotatably connected to the vertical connecting rods (42). The connecting rods (42) in any group of connecting rod assemblies (4) are connected to the upper end of the push rod (32). Several supports (41) in the two groups of connecting rod assemblies (4) are set in a corresponding manner in the horizontal direction. The two corresponding supports (41) are used to support the louver fan (2).

8. The manual venetian blind according to claim 7, characterized in that, The outer shell (31) is mounted on the inner wall of the louvered frame (1) via a fixed bracket (34). The upper end of the push rod (32) is connected to the connecting rod (42) via a movable bracket (35), and the fixed bracket (34) and the movable bracket (35) are mounted on the same side.

9. The manual venetian blind according to claim 7, characterized in that, The support (41) has two legs (43) on both sides of one end. One leg (43) is rotatably connected to the connecting rod (42), and the other leg (43) is suspended in the air.

10. The manual venetian blind according to claim 7, characterized in that, The louvered frame (1) is provided with slots (11) extending along a vertical distribution path of several supports (41). The support (41) has a groove inside. One end of the support rod (44) is rotatably connected to the slot (11), and the other end is rotatably connected to the groove.

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