Venetian blind

Abstract

The venetian blind comprises a rectangular window frame, a plurality of venetian blind pieces, a lifting pull rope, a turnover ladder rope and a lifting turnover device, the venetian blind pieces are arranged in the middle of the window frame, one end of the lifting pull rope penetrates through the venetian blind pieces and is fixed to the lowest venetian blind piece, and the other end of the lifting pull rope bypasses the lifting turnover device. The middle part of the turnover ladder rope bypasses the two ends of the lifting turnover device and then is respectively connected with a plurality of venetian blind sheets from top to bottom; the lifting and overturning device comprises two rotating units which move at the same time, the lifting pull rope and the overturning ladder rope are matched with the two rotating units respectively, and the lifting pull rope drives the overturning ladder rope to move through the rotating units so that the shutter blind pieces can be overturned when opened and closed up and down.

Description

Technical Field

[0001] The invention relates to a venetian blind. Background Art

[0002] Double-layer insulating glass built-in blinds are a window design with integrated sunshade function, which combines the thermal insulation and sound insulation performance of traditional insulating glass with the sunshade effect of blinds. This design makes the blinds located between two layers of glass, which is not only beautiful but also practical, avoiding the impact of the external environment on the blinds and extending their service life. The built-in blinds can control the opening and closing of the blades and the angle adjustment through the control device, which can block the sunlight and adjust the indoor light, providing a comfortable living environment.

[0003] The opening and closing of the shutter blades is controlled by a pull cord, and the angle adjustment of the blades is controlled by a ladder rope. A control device is provided on the side of the window. There are two common settings in the prior art. One is to provide a control device on each side of the window, one of which is used to control the pull cord to adjust the opening and closing of the blades, and the other is used to control the ladder rope to adjust the angle of the blades. The other is to use a control device to adjust the opening and closing and angle of the blades at the same time.

[0004] However, the above two settings both use the following structures for adjusting the angle of the blades: a transmission shaft parallel to the length direction of the blades is set at the top, a ladder rope pulley is sleeved on the transmission shaft, and the control device is connected to the transmission shaft through a circulating rope. When the control device is controlled up and down, the transmission shaft rotates to drive the ladder rope pulley to rotate, thereby controlling the blades to turn pages.

[0005] In the case of a large window, the design of this structure requires the transmission shaft to be longer. At this time, when the transmission shaft rotates, the two ends of the transmission shaft will rotate asynchronously, resulting in torsional deformation of the transmission shaft. Although this deformation is normal to a certain extent, the final effect is that the angle of the blade is inconsistent on the left and right, which affects the appearance. In addition, when the control device is connected to the transmission shaft through a loop rope, pulleys need to be installed at the top and bottom of the window, which has many parts. At the same time, a counterweight block is generally set under the control device. In order to prevent the counterweight block from affecting the loop rope, a groove for the loop rope to pass through needs to be opened on the counterweight block, which increases the production process and cost. Summary of the invention

[0006] The purpose of the present invention is to provide a blind to solve the technical problems mentioned in the above background technology.

[0007] The technical solution for achieving the purpose of the present invention is: a venetian blind, the venetian blind comprising a rectangular window frame, a plurality of venetian blinds, a lifting cord, a reversing ladder cord and a lifting and reversing device, the venetian blinds being arranged in the middle of the window frame, one end of the lifting cord passing through a plurality of venetian blinds and being fixed to the lowest venetian blinds, and the other end passing around the lifting and reversing device, the middle part of the reversing ladder cord passing around the lifting and reversing device and the two ends of the reversing ladder cord respectively connecting to a plurality of venetian blinds from top to bottom; the lifting and reversing device comprising two rotating units moving simultaneously, the lifting cord and the reversing ladder cord respectively cooperating with the two rotating units, the lifting cord driving the reversing ladder cord to move through the rotating unit so that the venetian blinds are opened and closed and simultaneously reversed.

[0008] Furthermore, the lifting and flipping device includes a lifting and flipping seat, a lifting wheel and a flipping wheel. The lifting and flipping seat is fixed on the upper side of the window frame, the lifting wheel and the flipping wheel are rotatably arranged in the lifting and flipping seat, and the lifting wheel and the flipping wheel are transmission connected; the lifting rope cooperates with the lifting wheel, and the flipping ladder rope cooperates with the flipping wheel.

[0009] Furthermore, the lifting wheel and the flipping wheel each include a central rotating shaft and gear parts on both sides of the rotating shaft, and the gear parts of the lifting wheel and the flipping wheel are meshed with each other.

[0010] Furthermore, a guiding slope is arranged on the gear portion of the flip wheel, and the guiding slope gradually approaches the middle of the rotating shaft as the radius decreases; the rotating shaft length of the flip wheel is adapted to the diameter of the flip ladder rope.

[0011] Furthermore, the axis center of the lifting wheel is higher than the axis center of the flipping wheel.

[0012] Furthermore, threading holes for the lifting rope to pass through are arranged on both sides of the lifting and flipping seat, and wire passing holes for the lifting rope and the flipping ladder rope to pass through are arranged on the bottom of the lifting and flipping seat.

[0013] Furthermore, the venetian blind curtain also includes a lower beam, which is arranged below the venetian blind slats. A spring is arranged in the lower beam, and one end of the lifting rope passes through a plurality of venetian blind slats and is connected to the bottom of the spring.

[0014] Furthermore, the venetian blinds also include a corner transition device and a control device, the corner transition device includes a corner transition bracket and a corner transition wheel, the corner transition bracket is fixed to the upper end of the window frame, the corner transition wheel is rotatably arranged on the corner transition bracket, the corner transition bracket is provided with a pull cord fixing portion, and one end of the lifting pull cord is fixedly connected to the pull cord fixing portion.

[0015] Furthermore, a vertical sliding groove is provided on the side of the window frame, and the control device slides in the sliding groove; a movable pulley, a roller and a magnet are provided on the control device, the magnet cooperates with the control handle outside the window frame, the roller cooperates with the glass fixed on the window frame, and a counterweight block is connected at the bottom of the control device.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects:

[0017] (1) The present invention uses a lifting and flipping device that cooperates with a lifting rope and a flipping ladder rope at the same time. It is no longer necessary to set a transmission shaft and a pulley and a circulating rope for controlling the rotation of the transmission shaft. The up and down opening and closing of the venetian blinds and the angle adjustment can be achieved, which solves the problem of inconsistent flipping angles of the blades when the window is large. At the same time, it greatly reduces the number of parts required and reduces production costs.

[0018] (2) The lifting and flipping device of the present invention comprises a lifting wheel and a flipping wheel meshing with each other. When the control device controls the opening and closing of the venetian blind, the flipping wheel is driven to rotate, thereby driving the venetian blind to flip.

[0019] (3) A guiding inclined surface is provided on the gear portion of the flip wheel of the present invention. When the venetian blinds are fully retracted, the flipping ladder rope is not subjected to force. When the venetian blinds are unfolded again, the flipping ladder rope can slide along the guiding inclined surface toward the middle rotating shaft. The width of the rotating shaft corresponds to the flipping ladder rope, which is convenient for increasing the friction between the flipping ladder rope and the flipping wheel, thereby preventing the flipping ladder rope from slipping and affecting the flipping effect of the venetian blinds.

[0020] (4) The shaft of the lifting wheel of the present invention is higher than the shaft of the flip wheel, thereby preventing the lifting rope from being affected by the flip wheel.

[0021] (5) One end of the lifting rope of the present invention passes through a plurality of venetian blinds and is fixed to the lowest venetian blind, and the other end passes through the flip wheel, the corner transition wheel and the control device in sequence and is fixed to the rope fixing part on the corner transition bracket, which can reduce the distance that the control device needs to move, make it more convenient for users to operate, and improve the comfort of use.

[0022] (6) A spring is disposed in the lower beam of the present invention. When the venetian blinds are fully extended, the control device is moved and the spring is compressed, thereby solving the problem that the venetian blinds cannot be turned over when they are fully extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Figure 2 It is a schematic structural diagram of the lifting and flipping device of the present invention.

[0026] Figure 3 It is a top view of the lifting and flipping device of the present invention.

[0027] The numbers in the accompanying drawings are: window frame 1, venetian blind slats 2, lifting cord 3, flip ladder rope 4, lifting and flipping device 5, lifting and flipping seat 5-1, threading hole 5-1-1, wire hole 5-1-2, lifting wheel 5-2, flip wheel 5-3, guide slope 5-3-1, corner transition device 6, corner transition bracket 6-1, cord fixing part 6-1-1, corner transition wheel 6-2, control device 7, movable pulley 7-1, roller 7-2, magnet 7-3, sliding groove 8. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when used, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0034] (Example 1)

[0035] See Figure 1-3 A venetian blind curtain of the present embodiment comprises a rectangular window frame 1, a plurality of venetian blind slats 2, a lifting cord 3, a reversing ladder cord 4, a lifting and reversing device 5, a corner transition device 6 and a control device 7. The venetian blind slats 2 are arranged in the middle of the window frame 1. One end of the lifting cord 3 passes through the plurality of venetian blind slats 2 and is fixed to the bottom venetian blind slat 2. The other end is fixed to the corner transition device 6 after passing through the lifting and reversing device 5, the corner transition device 6 and the control device 7 in sequence. After the reversing ladder cord 4 passes through the lifting and reversing device 5, both ends are connected to the plurality of venetian blind slats 2 from top to bottom respectively; the lifting and reversing device 5 comprises two rotating units that move simultaneously, the lifting cord 3 and the reversing ladder cord 4 cooperate with the two rotating units respectively, and when the control device 7 moves, the lifting cord 3 drives the reversing ladder cord 4 to move through the rotating unit so that the venetian blind slats 2 are opened and closed up and down and are reversed at the same time.

[0036] For details, see Figure 2-3 The lifting and flipping device 5 includes a lifting and flipping seat 5-1, a lifting wheel 5-2 and a flipping wheel 5-3. The lifting and flipping seat 5-1 is fixed on the upper side of the window frame 1. The lifting wheel 5-2 and the flipping wheel 5-3 are rotatably arranged in the lifting and flipping seat 5-1. The lifting wheel 5-2 and the flipping wheel 5-3 are transmission-connected. The lifting rope 3 cooperates with the lifting wheel 5-2, and the flipping ladder rope 4 cooperates with the flipping wheel 5-3. The lifting wheel 5-2 and the flipping wheel 5-3 both include a rotating shaft in the middle and gear parts on both sides of the rotating shaft, and the gear parts of the lifting wheel 5-2 and the flipping wheel 5-3 are meshed. Both sides of the lifting and flipping seat 5-1 are provided with threading holes 5-1-1 for the lifting rope 3 to pass through, and the bottom of the lifting and flipping seat 5-1 is provided with threading holes 5-1-2 for the lifting rope 3 and the flipping ladder rope 4 to pass through.

[0037] The corner transition device 6 includes a corner transition bracket 6-1 and a corner transition wheel 6-2. The corner transition bracket 6-1 is fixed to the upper end (i.e., the upper right corner) of the window frame 1. The corner transition wheel 6-2 is rotatably arranged on the corner transition bracket 6-1. A pull rope fixing portion 6-1-1 is arranged on the corner transition bracket 6-1. The lifting pull rope 3 is fixedly connected to the pull rope fixing portion 6-1-1.

[0038] A vertical sliding groove 8 (i.e., the right side) is provided on the side of the window frame 1, and the control device 7 slides in the sliding groove 8. The control device 7 is provided with a movable pulley 7-1, a roller 7-2, and a magnet 7-3. The magnet 7-3 cooperates with a control handle outside the window frame. The control handle is also provided with a magnet. The movement of the control device 7 is controlled by moving the control handle. The roller 7-2 cooperates with the glass fixed on the window frame 1 to reduce friction and facilitate the movement of the control device. A counterweight is connected below the control device 7.

[0039] In this embodiment, two lifting ropes 3, two reversing ladder ropes 4, and two lifting and reversing devices 5 are provided. Of course, if the window is too wide, the number of them can be increased. One end of the lifting rope 3 on the left side passes through multiple venetian blinds 2 and is fixed to the lowest venetian blinds 2. The other end passes through the lifting wheel 5-2 on the left side, passes through the lifting and reversing seat 5-1 on the right side, passes through the corner transition wheel 6-2, passes through the movable pulley 7-1 on the control device 7, and is fixed to the rope fixing part 6-1-1 on the corner transition bracket 6-1. One end of the lifting rope 3 on the right side passes through multiple venetian blinds 2 and is fixed to the lowest venetian blinds 2. The other end passes through the lifting wheel 5-2 on the right side, passes through the corner transition wheel 6-2, passes through the movable pulley 7-1 on the control device 7, and is fixed to the rope fixing part 6-1-1 on the corner transition bracket 6-1. After passing through the corresponding reversing wheel 5-3, the two ends of the reversing ladder rope 4 pass through multiple venetian blinds 2 respectively.

[0040] In order to prevent the lifting rope 3 on the left side from being affected by the flip wheel 5 - 3 on the right side, the axis of the lifting wheel 5 - 2 in this embodiment is higher than the axis of the flip wheel 5 - 3 .

[0041] The working mode of this embodiment is as follows: when the control device 7 moves up and down, the corresponding lifting wheel 5-2 is driven to rotate by the lifting rope 3, and the venetian blind slats 2 are stored and unfolded. At the same time, the lifting wheel 5-2 drives the flip wheel 5-3 to rotate, and the flip wheel 5-3 cooperates with the flip ladder rope 4 wound around the flip wheel 5-3, so that the venetian blind slats 2 can be flipped to adjust the angle.

[0042] See Figure 3A guiding slope 5-3-1 is provided on the gear portion of the flip wheel 5-3. When the venetian blind slats 2 are fully retracted, the flip ladder rope 4 is not subjected to force. When the venetian blind slats 2 are unfolded again, the flip ladder rope 4 can slide along the guiding slope 5-3-1 toward the middle shaft. The width of the shaft corresponds to the flip ladder rope 4, which is convenient for increasing the friction between the flip ladder rope 4 and the flip wheel 5-3, and preventing the flip ladder rope 4 from slipping and affecting the flipping effect of the venetian blind slats 2.

[0043] When the venetian blind slats 2 are opened and closed up and down, when they are turned over to the limit, the turning ladder rope 4 will slip with the turning wheel 5-3.

[0044] The present invention cooperates with the lifting rope 3 and the flipping ladder rope 4 through the lifting and flipping device 5, and there is no need to set a transmission shaft and a pulley and a circulating rope for controlling the rotation of the transmission shaft. The up and down opening and closing and angle adjustment of the blind slats 2 can be realized, which solves the problem of inconsistent flipping angles of the blades when the window is large, and at the same time greatly reduces the required parts and reduces the production cost.

[0045] (Example 2)

[0046] The venetian blinds also include a lower beam 9, which is arranged below the venetian blinds. A spring 10 is arranged inside the lower beam 9. As a preferred solution, a guide column is arranged inside the lower beam, and the spring is sleeved on the guide column. One end of the lifting rope 3 passes through a plurality of venetian blinds 2 and is connected to the bottom of the spring 10. When the venetian blinds 2 are fully extended, the control device 7 is moved, and the spring 10 is compressed. At this time, the venetian blinds 2 will not be retracted, but the end of the lifting rope 3 connected to the spring 10 will rise, driving the lifting wheel 5-2 and the flip wheel 5-3 to rotate, thereby driving the venetian blinds 2 to flip, solving the problem that the venetian blinds 2 cannot be flipped when they are fully extended.

[0047] Embodiment (3)

[0048] The difference between this embodiment and embodiment (1) is that embodiment 1 is a built-in Venetian blind, and therefore requires a control device 7 and an external control handle for operation, while this embodiment is an external Venetian blind, and therefore does not require a control device 7, and is controlled by the user manually pulling the lifting cord 3. As for how to jam the lifting cord 3 to prevent the Venetian blind slats 2 from falling, it is a conventional setting in the art and will not be described in detail here.

[0049] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A venetian blind, characterized in that: The venetian blind curtain comprises a rectangular window frame (1), a plurality of venetian blind slats (2), a lifting cord (3), a reversing ladder cord (4) and a lifting and reversing device (5); the venetian blind slats (2) are arranged in the middle of the window frame (1); one end of the lifting cord (3) passes through the plurality of venetian blind slats (2) and is fixed to the lowest venetian blind slat (2); the other end passes around the lifting and reversing device (5); the middle part of the reversing ladder cord (4) passes around the lifting and reversing device (5) and then the two ends are respectively connected to the plurality of venetian blind slats (2) from top to bottom; the lifting and reversing device (5) comprises two rotating units that move simultaneously; the lifting cord (3) and the reversing ladder cord (4) are respectively matched with the two rotating units; the lifting cord (3) drives the reversing ladder cord (4) to move through the rotating unit so that the venetian blind slats (2) open up and down and are simultaneously reversed.

2. The blind according to claim 1, characterized in that: The lifting and flipping device (5) comprises a lifting and flipping seat (5-1), a lifting wheel (5-2) and a flipping wheel (5-3); the lifting and flipping seat (5-1) is fixed on the upper side of the window frame (1); the lifting wheel (5-2) and the flipping wheel (5-3) are rotatably arranged in the lifting and flipping seat (5-1); the lifting wheel (5-2) and the flipping wheel (5-3) are transmission-connected; the lifting rope (3) cooperates with the lifting wheel (5-2); and the flipping ladder rope (4) cooperates with the flipping wheel (5-3).

3. The blind according to claim 2, characterized in that: The lifting wheel (5-2) and the flip wheel (5-3) both comprise a central rotating shaft and gear parts on both sides of the rotating shaft, and the gear parts of the lifting wheel (5-2) and the flip wheel (5-3) are meshed with each other.

4. The blind according to claim 3, characterized in that: A guide slope (5-3-1) is arranged on the gear portion of the flip wheel (5-3), and the guide slope (5-3-1) gradually approaches the middle of the rotating shaft as the radius decreases; the rotating shaft length of the flip wheel (5-3) is adapted to the diameter of the flip ladder rope (4).

5. The blind according to claim 2, characterized in that: The axis center of the lifting wheel (5-2) is higher than the axis center of the turning wheel (5-3).

6. The blind according to claim 2, characterized in that: Both sides of the lifting and flipping seat (5-1) are provided with threading holes (5-1-1) for the lifting and flipping rope (3) to pass through, and the bottom of the lifting and flipping seat (5-1) is provided with a wire passing hole (5-1-2) for the lifting and flipping rope (3) and the flipping ladder rope (4) to pass through.

7. The blind according to claim 1, characterized in that: The venetian blind curtain further comprises a lower beam (9), the lower beam (9) being arranged below the venetian blind slats (2), a spring (10) being arranged inside the lower beam (9), and one end of the lifting rope (3) passing through a plurality of venetian blind slats (2) and connected to the bottom of the spring (10).

8. The blind according to claim 1, characterized in that: The venetian blind also includes a corner transition device (6) and a control device (7). The corner transition device (6) includes a corner transition bracket (6-1) and a corner transition wheel (6-2). The corner transition bracket (6-1) is fixed to the upper end of the window frame (1). The corner transition wheel (6-2) is rotatably arranged on the corner transition bracket (6-1). The corner transition bracket (6-1) is provided with a pull cord fixing portion (6-1-1). One end of the lifting pull cord (3) is fixedly connected to the pull cord fixing portion (6-1-1).

9. The blind according to claim 8, characterized in that: The side of the window frame (1) is provided with a vertical sliding groove (8), and the control device (7) slides in the sliding groove (8); the control device (7) is provided with a movable pulley (7-1), a roller (7-2) and a magnet (7-3), the magnet (7-3) cooperates with a control handle outside the window frame (1), the roller (7-2) cooperates with a glass fixed on the window frame (1), and a counterweight block is connected below the control device (7).

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