A louvered blind

Abstract

The utility model discloses a louver roller, including roller, drive arrangement, a plurality of curtain piece, lift pull rope, light control pull rope, light control axle and light control support, lift pull rope one end is fixed on the roller, and the other end is fixed after passing a plurality of curtain piece in proper order with the lowest curtain piece, drive arrangement drives the rotation of roller, light control axle and light control support are set on the roller, light control pull rope both ends are connected with the both sides of a plurality of curtain piece in proper order and form the ladder band, and both ends are connected with light control axle, the roller drives light control axle rotation, when light control axle rotates to the extreme position, light control support prevents light control axle rotation. The utility model discloses when the curtain piece lifting can carry out light control simultaneously, sets up light control support to limit the extreme rotation position of light control axle, prevents the friction between light control pull rope and light control axle, prevents excessive rotation simultaneously and causes light control pull rope or curtain piece damage, has promoted product life.

Description

Technical Field

[0001] This utility model relates to a venetian roller blind. Background Technology

[0002] As a common indoor sun shading product, Venetian roller blinds are widely used in homes, offices, and commercial spaces, offering functions such as light blocking, light adjustment, heat insulation, privacy protection, and decoration. Traditional Venetian roller blinds typically consist of slats, rollers, a lifting mechanism, and a light-adjusting mechanism. The overall raising and lowering of the blinds, as well as the adjustment of the slat angle, are achieved manually or electrically to control indoor light intensity and visual transparency.

[0003] In existing technologies, most multi-blade roller blinds employ independent lifting and dimming cord systems. The lifting function involves winding or releasing the lifting cord, causing the entire blind slat to move up and down. The dimming function is achieved by pulling the dimming cord, which drives a ladder-like structure connecting the blind slats, causing the blind slats to rotate around an axis, thus adjusting the opening angle. However, this structure makes it difficult to achieve automatic dimming during lifting, requiring separate operation by the user, which is inconvenient.

[0004] Building upon this, Venetian roller blinds with automatic light adjustment during lifting and lowering were developed. These blinds feature a light-adjusting shaft mounted on a roller, with a light-adjusting cord looping around it. The rotation of the roller causes the curtain slats to rise and fall, simultaneously rotating the light-adjusting shaft. The shaft, through friction, drives the light-adjusting cord to move synchronously for light adjustment. After the curtain slats reach their limit, the light-adjusting shaft continues to rotate, causing slippage between it and the light-adjusting cord. In this structure, frequent friction occurs between the light-adjusting cord and the light-adjusting shaft during the lifting and lowering process. Furthermore, the curtain slats are subjected to tension from the light-adjusting cord after reaching their limit, affecting the lifespan of the blinds. Utility Model Content

[0005] The purpose of this utility model is to provide a venetian blind to solve the technical problems mentioned in the background art.

[0006] The technical solution to achieve the purpose of this utility model is: a Venetian roller blind, including a roller shaft, a drive device, multiple curtain slats, a lifting pull cord, a dimming pull cord, a dimming shaft, and a dimming bracket. One end of the lifting pull cord is fixed to the roller shaft, and the other end passes through multiple curtain slats in sequence and is fixed to the lowest curtain slat. The drive device drives the roller shaft to rotate. The dimming shaft and the dimming bracket are sleeved on the roller shaft. The two ends of the dimming pull cord are connected to the two sides of multiple curtain slats in sequence to form a ladder, and both ends are connected to the dimming shaft. The roller shaft drives the dimming shaft to rotate. When the dimming shaft rotates to the limit position, the dimming bracket prevents the dimming shaft from rotating.

[0007] Furthermore, the dimming bracket has a groove, and the dimming shaft has a protrusion. When the dimming shaft rotates, the protrusion moves in the groove. When the dimming shaft rotates to its limit position, the protrusion abuts against the edge of the groove.

[0008] Furthermore, a torque limiting coupling is provided between the dimming shaft and the roller shaft.

[0009] Furthermore, the torque limiting coupling is a coil spring, which is sleeved on the roller shaft. The two ends of the coil spring abut against the two sides of the protrusion, and the roller shaft drives the dimming shaft to rotate through the coil spring. When the dimming shaft rotates to the limit position, the coil spring is rotatably connected to the roller shaft.

[0010] Furthermore, the torque limiting coupling is a friction plate, which is disposed between the roller shaft and the dimming shaft.

[0011] Furthermore, the dimming bracket is also provided with a limiting block, which restricts the dimming shaft from detaching from the dimming bracket along the axial direction; the dimming bracket is also provided with an inlet groove, one end of which is connected to the groove and the other end extends to the edge of the dimming bracket.

[0012] Furthermore, the dimming bracket is provided with a wire hole, the dimming shaft is provided with a wire groove, and one end of the lifting rope passes through the wire hole and the wire groove in sequence and is then fixed on the roller shaft.

[0013] Furthermore, it also includes a lower beam, on which an adjusting wheel is provided, and one end of the lifting rope is fixed to the adjusting wheel, and the other end is fixed to the roller.

[0014] Furthermore, a slot is provided on the outer surface of the dimming shaft, and a locking strip is fixed to the end of the dimming pull rope, the locking strip being embedded in the slot.

[0015] Furthermore, it also includes a housing, in which the roller is rotatably disposed, and the dimming bracket is fixedly connected to the housing.

[0016] By adopting the above technical solution, this utility model has the following beneficial effects:

[0017] (1) This utility model can dim the light while the curtain is being raised and lowered. A dimming bracket is set to limit the extreme rotation position of the dimming shaft, prevent friction between the dimming pull rope and the dimming shaft, and prevent excessive rotation from damaging the dimming pull rope or the curtain, thus improving the product life.

[0018] (2) This utility model achieves mechanical limiting by the cooperation of protrusions and grooves. The limiting process is stable and reliable, avoiding the dimming action from exceeding the design range and protecting the dimming pull rope and curtain.

[0019] (3) The present invention provides a torque limiting coupling between the dimming shaft and the roller shaft. When dimming, the roller shaft drives the dimming shaft to rotate. When the dimming shaft rotates to the limit position, the dimming shaft and the roller shaft rotate relative to each other to prevent the motor from jamming and burning out.

[0020] (4) The present invention provides a wire groove and a wire hole on the dimming shaft and dimming bracket, and the wire route of the lifting rope is blocked by the ladder belt, making the appearance neater and more beautiful.

[0021] (5) This utility model uses adjusting wheels set on the lower beam to adjust the balance of the lower beam, ensuring that the curtain is vertical and flat as a whole.

[0022] (6) In this utility model, the dimming pull rope is connected to the dimming shaft by a clip, which makes it easy to install and disassemble, and facilitates production assembly and later maintenance. Attached Figure Description

[0023] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0024] Figure 1 This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 This is a structural schematic diagram of the present invention from another angle.

[0026] Figure 3 This is a schematic diagram of the dimming shaft and dimming bracket of this utility model.

[0027] Figure 4 This is a schematic diagram of the dimming bracket of this utility model.

[0028] Figure 5 This is a schematic diagram of the dimming shaft of this utility model.

[0029] Figure 6 This is a structural schematic diagram of the dimming axis of this utility model from another angle.

[0030] The labels in the attached diagram are as follows: roller 1, curtain 2, lifting pull rope 3, dimming pull rope 4, dimming shaft 5, protrusion 5-1, wire guide groove 5-2, slot 5-3, dimming bracket 6, groove 6-1, wire guide hole 6-2, limit block 6-3, inlet groove 6-4, coil spring 7, lower beam 8, adjusting wheel 8-1, locking strip 9, cover 10. Detailed Implementation

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] 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 claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of the embodiments of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this utility model and should not be used to limit the scope of protection of this utility model.

[0037] (Example 1)

[0038] See Figure 1-6The Venetian blind of this embodiment includes a roller 1, a drive device, multiple curtain slats 2, a lifting cord 3, a dimming cord 4, a dimming shaft 5, and a dimming bracket 6. One end of the lifting cord 3 is fixed to the roller 1, and the other end passes through multiple curtain slats 2 in sequence and is fixed to the lowest curtain slat 2. The drive device drives the roller 1 to rotate. The dimming shaft 5 and the dimming bracket 6 are sleeved on the roller 1. The two ends of the dimming cord 4 are connected to the two sides of multiple curtain slats 2 in sequence to form a ladder, and both ends are connected to the dimming shaft 5. The roller 1 drives the dimming shaft 5 to rotate. When the dimming shaft 5 rotates to its limit position, the dimming bracket 6 prevents the dimming shaft 5 from rotating. In this embodiment, the drive device is a tubular motor, which is set inside one end of the roller 1. Of course, it can also be installed in parallel with the roller 1 and drive the roller 1 to rotate through a transmission device. These motor installation methods are common in the industry and will not be described in detail here.

[0039] Specifically, the dimming bracket 6 has a groove 6-1, and the dimming shaft 5 has a protrusion 5-1. The groove 6-1 is arc-shaped, and the protrusion 5-1 is located within the groove 6-1. When the dimming shaft 5 rotates, the protrusion 5-1 moves within the groove 6-1. When the dimming shaft 5 rotates to its limit position, the protrusion 5-1 abuts against the inner edge of the groove 6-1. The mechanical limiting is achieved through the cooperation of the protrusion 5-1 and the groove 6-1. The limiting process is stable and reliable, preventing the dimming action from exceeding the design range and protecting the dimming pull cord 4 and the curtain slat 2.

[0040] A torque limiting coupling is provided between the dimming shaft 5 and the roller shaft 1. In this embodiment, the torque limiting coupling is a coil spring 7, which is sleeved on the roller shaft 1. The two ends of the coil spring 7 abut against the two sides of the protrusion 5-1 respectively. The roller shaft 1 drives the dimming shaft 5 to rotate through the coil spring 7. When the dimming shaft 5 rotates to the limit position, the coil spring 7 slips and forms a rotational connection with the roller shaft 1.

[0041] The dimming bracket 6 is also provided with a limiting block 6-3, which restricts the dimming shaft 5 from axially disengaging from the dimming bracket 6. The dimming shaft 5 is provided with a stop that matches the limiting block 6-3, and the stop is provided between the main body of the dimming bracket 6 and the limiting block 6-3. The dimming bracket 6 is also provided with an inlet groove 6-4, one end of which is connected to the groove 6-1, and the other end extends to the edge of the dimming bracket 6. During installation, the protrusion 5-1 is slid from the inlet groove 6-4 into the groove 6-1, so that the dimming shaft 5 is coaxial with the dimming bracket 6 and then sleeved on the roller 1.

[0042] The dimming bracket 6 is provided with a wire-passing hole 6-2, and the dimming shaft 5 is provided with a wire-passing groove 5-2. One end of the lifting rope 3 passes through the wire-passing hole 6-2 and the wire-passing groove 5-2 in sequence and is then fixed to the roller shaft 1. As a preferred embodiment, the wire-passing hole 6-2 and the wire-passing groove 5-2 are located behind the ladder belt, and the wire path of the lifting rope 3 is blocked by the ladder belt, resulting in a cleaner and more aesthetically pleasing appearance.

[0043] It also includes a lower beam 8, on which an adjusting wheel 8-1 is provided. One end of the lifting rope 3 is fixed to the adjusting wheel 8-1, and the other end is fixed to the roller 1. Adjusting the balance of the lower beam 8 by adjusting the adjusting wheel 8-1 is existing technology and will not be described in detail here.

[0044] The outer surface of the dimming shaft 5 is provided with two slots 5-3. Each end of the dimming pull rope 4 is fixed with a retaining strip 9, which is embedded in the slot 5-3. The dimming pull rope 4 is engaged with the dimming shaft 5 through the retaining strips 9, which is convenient for installation and disassembly, and facilitates production assembly and subsequent maintenance.

[0045] It also includes a housing 10, in which the roller 1 is rotatably disposed, and the dimming bracket 6 is fixedly connected to the housing 10.

[0046] (Example 2)

[0047] In this embodiment, the torque limiting coupling is a friction plate, which is disposed between the roller shaft 1 and the dimming shaft 5. When the roller shaft 1 rotates, it drives the dimming shaft 5 to rotate together through the friction plate. When the protrusion 5-1 abuts against the edge of the groove 6-1, the roller shaft 1 and the dimming shaft 5 slip and form a rotational connection.

[0048] This invention allows for dimming simultaneously when the curtain slat 2 is raised or lowered. A dimming bracket 6 is provided to limit the extreme rotation position of the dimming shaft 5, preventing friction between the dimming pull rope 4 and the dimming shaft 5, and preventing excessive rotation from damaging the dimming pull rope 4 or the curtain slat 2, thereby improving the product's lifespan.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A type of Venetian blind, characterized in that: The device includes a roller (1), a drive unit, multiple curtain slats (2), a lifting cord (3), a dimming cord (4), a dimming shaft (5), and a dimming bracket (6). One end of the lifting cord (3) is fixed on the roller (1), and the other end passes through multiple curtain slats (2) in sequence and is fixed to the lowest curtain slat (2). The drive unit drives the roller (1) to rotate. The dimming shaft (5) and the dimming bracket (6) are sleeved on the roller (1). The two ends of the dimming cord (4) are connected to the two sides of multiple curtain slats (2) in sequence to form a ladder, and both ends are connected to the dimming shaft (5). The roller (1) drives the dimming shaft (5) to rotate. When the dimming shaft (5) rotates to the limit position, the dimming bracket (6) prevents the dimming shaft (5) from rotating.

2. The Venetian blind according to claim 1, characterized in that: The dimming bracket (6) has a groove (6-1) and the dimming shaft (5) has a protrusion (5-1). When the dimming shaft (5) rotates, the protrusion (5-1) moves in the groove (6-1). When the dimming shaft (5) rotates to the limit position, the protrusion (5-1) abuts against the edge of the groove (6-1).

3. A venetian roller blind according to claim 1, characterized in that: A torque limiting coupling is provided between the dimming shaft (5) and the roller shaft (1).

4. A venetian roller blind according to claim 3, characterized in that: The torque limiting coupling is a coil spring (7), which is sleeved on the roller shaft (1). The two ends of the coil spring (7) abut against the two sides of the protrusion (5-1) respectively. The roller shaft (1) drives the dimming shaft (5) to rotate through the coil spring (7). When the dimming shaft (5) rotates to the limit position, the coil spring (7) is rotatably connected to the roller shaft (1).

5. A venetian roller blind according to claim 3, characterized in that: The torque limiting coupling is a friction plate, which is disposed between the roller shaft (1) and the dimming shaft (5).

6. A venetian roller blind according to claim 1, characterized in that: The dimming bracket (6) is also provided with a limiting block (6-3), which restricts the dimming shaft (5) from detaching from the dimming bracket (6) along the axial direction; the dimming bracket (6) is also provided with an inlet groove (6-4), one end of which is connected to the groove (6-1), and the other end extends to the edge of the dimming bracket (6).

7. A venetian roller blind according to claim 1, characterized in that: The dimming bracket (6) is provided with a wire hole (6-2), the dimming shaft (5) is provided with a wire groove (5-2), and one end of the lifting rope (3) passes through the wire hole (6-2) and the wire groove (5-2) in sequence and is fixed on the roller shaft (1).

8. A venetian roller blind according to claim 1, characterized in that: It also includes a lower beam (8), on which an adjusting wheel (8-1) is provided. One end of the lifting rope (3) is fixed on the adjusting wheel (8-1), and the other end is fixed on the roller (1).

9. A venetian roller blind according to claim 1, characterized in that: A slot (5-3) is provided on the outer side of the dimming shaft (5), and a clip (9) is fixed to the end of the dimming pull rope (4), and the clip (9) is embedded in the slot (5-3).

10. A venetian roller blind according to claim 1, characterized in that: It also includes a housing (10), the roller (1) is rotatably disposed in the housing (10), and the dimming bracket (6) is fixedly connected to the housing (10).

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