Retractable blind system

Abstract

A retractable blind system including a first drive mechanism and a second drive mechanism. The system also includes a fabric having a first lateral side and a second lateral side, with the fabric being movable between a first fabric position and a second fabric position. The fabric comprises a plurality of drive holes located on the first lateral side and the second lateral side. The first drive mechanism is configured to engage the plurality of drive holes on the first lateral side of the fabric, and the second drive mechanism is configured to engage the plurality of drive holes on the second lateral side of the fabric when moving the fabric between the first fabric position and the second fabric position.

Description

[0001] Retractable Blind System

[0002] Field

[0003] The technology relates to the field of window coverings, specifically retractable blind systems used for controlling light, privacy, and insulation in residential, commercial, and industrial settings. These systems typically involve a fabric or material that can be extended or retracted to cover or uncover a window or other opening, and may include various mechanisms for controlling the movement and positioning of the fabric.

[0004] Retractable blind systems, such as zip blinds, are commonly used in residential and commercial settings to provide privacy, control sunlight, and enhance the aesthetics of a space. These systems typically comprise a fabric that is rolled onto a fabric barrel that can be extended or retracted whilst applying force to either side of the fabric. The fabric is often held in place by a zip or other attachment mechanism on each side, which engages with guide channels to maintain the position of the fabric.

[0005] Existing zip blind systems, however, suffer from several problems that affect their overall appearance and functionality. One such problem is fabric rippling, which occurs due to uneven distribution of forces in the fabric. Fabric rippling not only affects the appearance of the blinds but also their functionality, as it may develop into creasing, and potentially cause the blinds to not fully close or open.

[0006] Another issue with existing zip blind systems is their size limitations. The elasticity of the fabric and uneven lines of force restrict the size of zip blind systems, limiting their application in larger spaces. This is particularly problematic in commercial settings, where larger blinds may be required to cover expansive windows or partitions.

[0007] To avoid fabric rippling, zip blind systems often require large and strong bars and fabric barrels. These components must be able to resist deflection, which would result in fabric rippling. However, the use of large and strong components increases the overall weight and complexity of the system, making it more difficult to install and maintain. Additionally, large fabric barrels are necessary for resistance to bending and zip stackup, but they are undesirable due to space, aesthetics, and cost concerns. In a conventional zip system, the zip must be thicker than the fabric it is attached to, which causes the edges of the fabric to stack up and limits the diameter of the barrel that can be used. Too small a diameter will cause unworkable zip stackup, leading to the need for large fabric barrels.

[0008] Summary

[0009] According to a first aspect of the disclosure, a retractable blind system is provided. The system comprises a first drive mechanism and a second drive mechanism. The system also includes a fabric having a first lateral side and a second lateral side, with the fabric being movable between a first fabric position and a second fabric position. The fabric comprises a plurality of drive holes located on the first lateral side and the second lateral side. The first drive mechanism is configured to engage the plurality of drive holes on the first lateral side of the fabric and the second drive mechanism is configured to engage the plurality of drive holes on the second lateral side of the fabric when moving the fabric between the first fabric position and the second fabric position. This configuration allows for precise control over the movement of the fabric, enhancing the functionality and user experience of the blind system. Furthermore, the drive holes avoid an uneven diameter of the fabric when rolled up and does not wrinkle along the sides of the fabric.

[0010] Optionally, the system comprises a motor system operatively coupled to the drive mechanism and the second drive mechanism. Optionally the system comprises a manually operated actuator coupled to the first and second drive mechanisms.

[0011] Optionally in some examples, the first drive mechanism and the second drive mechanism each comprise a tractor feed fabric system configured to engage the respective plurality of drive holes on the first lateral side and the second lateral side of the fabric. This configuration provides a robust and reliable mechanism for moving the fabric, enhancing the durability and longevity of the blind system. Optionally in some examples, the tractor feed fabric system comprises a belt having a plurality of contact pins configured to engage the plurality of drive holes. This configuration provides a secure and firm grip on the fabric, ensuring smooth and consistent movement of the fabric.

[0012] Optionally in some examples, the tractor feed fabric system comprises a bead chain having a plurality of beads, with the plurality of beads being configured to engage the plurality of drive holes. This configuration provides an alternative mechanism for engaging the drive holes, offering flexibility in the design and operation of the blind system.

[0013] Optionally in some examples, the first drive mechanism and the second drive mechanism are synchronised to move the fabric evenly between the first fabric position and the second fabric position. This configuration ensures that the fabric is moved evenly and smoothly, enhancing the aesthetic appeal and functionality of the blind system.

[0014] Optionally in some examples, the system further comprises a control unit configured to send control signals to the motor system to control the movement of the fabric between the first fabric position and the second fabric position. This configuration allows for precise and automated control over the movement of the fabric, enhancing the user experience and convenience of the blind system.

[0015] Optionally in some examples, the motor system comprises a first motor operatively coupled to the first drive mechanism. This configuration provides a dedicated power source for the first drive mechanism, ensuring reliable and efficient operation of the blind system.

[0016] Optionally in some examples, the system further comprises a coupling rod operatively connecting the first motor to the second drive mechanism, wherein the coupling rod is configured to transmit rotational force from the first motor to the second drive mechanism. This configuration allows for efficient transmission of power from the first motor to the second drive mechanism, enhancing the overall efficiency and performance of the blind system. Optionally in some examples, the coupling rod is located within a fabric barrel and is positioned above the first fabric position or below the second fabric position. This configuration allows for a compact and space-efficient design of the blind system, enhancing its aesthetic appeal and ease of installation.

[0017] Optionally in some examples, the motor system further comprises a second motor operatively coupled to the second drive mechanism. This configuration provides a dedicated power source for the second drive mechanism, ensuring reliable and efficient operation of the blind system.

[0018] Optionally in some examples, the system further comprises a headbox configured to house a fabric barrel for storing the fabric as a roll. This configuration provides a secure and protected storage space for the fabric when not in use, enhancing the durability and longevity of the fabric.

[0019] Optionally in some examples, the fabric barrel is rotatably mounted in the headbox and comprises a return spring configured to provide a pulling force to return the fabric barrel to its original position after the fabric has been retracted or extended. This configuration ensures that the fabric is neatly and securely stored after use, enhancing the aesthetic appeal and functionality of the blind system.

[0020] Optionally in some examples, the system further comprises a hembar configured to hold the fabric securely in place at the bottom of the blind. This configuration ensures that the fabric is held securely and firmly in place, enhancing the functionality and user experience of the blind system.

[0021] Optionally in some examples, the first fabric position and the second fabric position are determined by control signals sent by the control unit. This configuration allows for precise and automated control over the positioning of the fabric, enhancing the user experience and convenience of the blind system.

[0022] According to a second aspect of the disclosure, a method of operating the retractable blind system is provided The method comprises driving the first drive mechanism and the second drive mechanism, with the first drive mechanism and the second drive mechanism being respectively arranged on a first lateral side and a second lateral side of a fabric, and engaging and moving the fabric towards or away from a fabric barrel by the first drive mechanism and the second drive mechanism when moving the fabric between a first fabric position and a second fabric position. This method allows for precise and automated control over the operation of the blind system, enhancing the user experience and convenience of the blind system.

[0023] Optionally, the method comprises, sending control signals from a control unit to a motor system coupled to the first drive mechanism and the second drive mechanism.

[0024] According to a third aspect of the disclosure, a blind fabric for a retractable blind system is provided. The blind fabric has a first lateral side and a second lateral side, with the blind fabric being movable between a first fabric position and a second fabric position. The blind fabric comprises a plurality of drive holes located on the first lateral side and the second lateral side, with the drive holes being configured to engage with a first drive mechanism and a second drive mechanism of the retractable blind system when moving the blind fabric between the first fabric position and the second fabric position. This configuration allows for precise control over the movement of the blind fabric, enhancing the functionality and user experience of the blind system.

[0025] Brief Description of the Drawings

[0026] Examples are described in more detail below with reference to the appended drawings. Figure 1 is a schematic view of a retractable blind system according to an example.

[0027] Figure 2 shows a first example of the first drive mechanism and the second drive mechanism according to an example.

[0028] Figure 3 illustrates a second example of the first drive mechanism and the second drive mechanism according to an example.

[0029] Figure 4 depicts a third example of the first drive mechanism and the second drive mechanism according to an example.

[0030] Figure 5 presents a schematic view of another retractable blind system wherein a first motor drives the first drive mechanism and the second drive mechanism. Detailed Description

[0031] The detailed description set forth below provides information and examples of the disclosed technology with sufficient detail to enable those skilled in the art to practise the disclosure.

[0032] Figure 1 illustrates a detailed view of the retractable blind system 100. The retractable blind system 100 is designed to control the amount of light entering a room by adjusting the position of a fabric 112. The retractable blind system 100 includes various components that work together to move the fabric 112 between a first fabric position 158 and a second fabric position 160. The components of the retractable blind system 100 are housed within a headbox 102 and include a fabric barrel 104, bearings 106, and a barrel shaft 108.

[0033] As shown in Figure 1 , the headbox 102 is a housing component of the retractable blind system 100. The headbox 102 is configured to receive the fabric barrel 104 and protect the fabric 112 when it is rolled onto the fabric barrel 104. The headbox 102 is designed to be robust and durable to protect the internal components of the retractable blind system 100 from damage. The headbox 102 also provides a neat and tidy appearance to the retractable blind system 100 when the fabric 112 is fully retracted.

[0034] The fabric barrel 104 is configured to store the fabric 112 as a roll. The fabric barrel 104 is rotatably mounted within the headbox 102 and is designed to rotate about a rotational axis 110. The rotation of the fabric barrel 104 allows the fabric 112 to be moved towards or away from the fabric barrel 104 by the drive system 124. A first longitudinal fabric end 118 of the fabric 112 is connected to the fabric barrel 104 as shown in Figure 1 .

[0035] In some configurations, the retractable blind system 100 comprises bearing 106 that support the rotation of the fabric barrel 104. The bearings 106 are positioned within the headbox 102 and are configured to rotatably support the barrel shaft 108. The bearings 106 allow for smooth and efficient rotation of the fabric barrel 104, thereby facilitating the movement of the fabric 112. The barrel shaft 108 is rotatably mounted in the bearings 106. The barrel shaft 108 is connected to the fabric barrel 104 and allows for the rotation of the fabric barrel 104 about the rotational axis 110. The barrel shaft 108 is designed to withstand the forces exerted by the fabric 112 and the drive system 124 during the operation of the retractable blind system 100.

[0036] The fabric 112 is configured to be moved by the first drive mechanism 126 and the second drive mechanism 128 between a first fabric position 158 and a second fabric position 160. The fabric 112 is configured to provide solar shading for a window or any other part of a building when deployed.

[0037] The fabric 112 has a first lateral side 114 and a second lateral side 116, each of which is engaged by the respective first drive mechanism 126 and second drive mechanism 128. The first and second drive mechanisms 126, 128 are discussed in more detail below.

[0038] The fabric 112 also includes a plurality of drive holes 136 located on both the first lateral side 114 and the second lateral side 116. These drive holes 136 are configured to engage with the sprocket teeth 152, or the contact pins 146 of the belt 144, or the bead chain 164, allowing the fabric 112 to be moved towards or away from the fabric barrel 104 by the drive system 124 as discussed in more detail with reference to Figures 2, 3 and 4. The fabric 112 is also configured to be stored on the fabric barrel 104 as a roll when not in use. In some examples, the fabric 112 can be any suitable material for solar shading. The fabric 112 is rollable on the fabric barrel 104. In some examples, the fabric 112 can be a polyester fabric, a polypropylene fabric, a nylon fabric, or a cotton fabric or any other suitable fabric 112 or rollable material.

[0039] In some examples, the hembar 122 is configured to hold the fabric 112 securely in place at the bottom of the fabric 112 at the second longitudinal fabric end 120. The hembar 122 is connected to the second longitudinal fabric end 120 of the fabric 112 and provides weight to the fabric 112, helping to keep it taut and preventing it from billowing or flapping in the wind. The hembar 122 also aids in the smooth and even retraction and extension of the fabric 112 by the drive system 124. In order to move the fabric 112 between the first fabric position 158 and the second fabric position 160, the retractable blind system 100 comprises a drive system 124. The drive system 124 is configured to move the fabric 112 by engaging and moving it towards or away from the fabric barrel 104. The drive system 124 includes a motor system 130 that drives the first drive mechanism 126 and the second drive mechanism 128. This dual drive mechanism allows for even distribution of force along each side of the fabric 112, preventing rippling and ensuring smooth operation of the retractable blind system 100.

[0040] The first drive mechanism 126 is configured to engage and move the fabric 112. The first drive mechanism 126 is operatively coupled to the motor system 130 and is arranged on the first lateral side 114 of the fabric 112. The first drive mechanism 126 engages the plurality of drive holes 136 on the first lateral side 114 of the fabric 112, allowing the fabric 112 to be moved towards or away from the fabric barrel 104. The first drive mechanism 126 can comprise a tractor feed fabric system 142, a belt 144 with contact pins 146, or drive sprockets 150, depending on the specific implementation of the retractable blind system 100.

[0041] The second drive mechanism 128 is also configured to engage and move the fabric 112. The second drive mechanism 128 is also operatively coupled to the motor system 130 and is arranged on the second lateral side 116 of the fabric 112. The second drive mechanism 128 engages the plurality of drive holes 136 on the second lateral side 116 of the fabric 112, allowing the fabric 112 to be moved towards or away from the fabric barrel 104.

[0042] Like the first drive mechanism 126, the second drive mechanism 128 can comprise a tractor feed fabric system 142, a belt 144 with contact pins 146, or drive sprockets 150, depending on the specific implementation of the retractable blind system 100. In some configurations, the first drive mechanism 126 and the second drive mechanism 128 are synchronised to move the fabric 112 evenly between the first fabric position 158 and the second fabric position 160.

[0043] In some examples, the retractable blind system 100 optionally includes a sensor that is connected to the control unit 132. The sensor is configured to detect the position of the fabric 112 and provide feedback to the control unit 132. This feedback allows the control unit 132 to accurately control the movement of the fabric 112 between the first fabric position 158 and the second fabric position 160. The sensor can be any suitable type of sensor, such as an optical sensor, a mechanical sensor, or an electronic sensor, depending on the specific implementation of the retractable blind system 100. In some examples, the sensor is the first motor 134 and I or second motor 140. For example, the first motor 134 and the second motor 140 are a stepper motor or a servo motor.

[0044] In some implementations, the retractable blind system 100 includes a processor that is part of the control unit 132. The control unit 132 is configured to issue control signals to the motor system 130. The processor also processes the feedback received from the sensor to determine the current position of the fabric 112 and to control the movement of the fabric 112 between the first fabric position 158 and the second fabric position 160. The processor can be any suitable type of processor, such as a microprocessor or a digital signal processor, depending on the specific implementation of the retractable blind system 100.

[0045] In some configurations, the retractable blind system 100 includes a memory that is part of the control unit 132. The memory is configured to store the control signals sent by the control unit 132 to the motor system 130. The memory also stores the feedback received from the sensor, as well as any other data related to the operation of the retractable blind system 100. The memory can be any suitable type of memory, such as a random access memory (RAM), a read-only memory (ROM), or a flash memory, depending on the specific implementation of the retractable blind system 100.

[0046] In some examples, the retractable blind system 100 optionally includes an output device that is connected to the control unit 132. The output device is configured to provide visual, auditory, or tactile feedback to a user regarding the operation of the retractable blind system 100. For example, the output device may provide a visual indication of the current position of the fabric 112, or it may provide an auditory or tactile alert when the fabric 112 reaches the first fabric position 158 or the second fabric position 160. The output device can be any suitable type of output device, such as a display, a speaker, or a vibration motor, depending on the specific implementation of the retractable blind system 100.

[0047] In some configurations, the retractable blind system 100 optionally includes a communication interface that is part of the control unit 132. The communication interface is configured to facilitate communication between the control unit 132 and the motor system 130, as well as between the control unit 132 and any external devices. The communication interface can support any suitable communication protocol, such as a wired protocol (e.g., USB, Ethernet) or a wireless protocol (e.g., Bluetooth, Wi-Fi), depending on the specific implementation of the retractable blind system 100.

[0048] The first motor 134 is operatively coupled to the first drive mechanism 126. The first motor 134 is configured to drive the first drive mechanism 126, thereby moving the fabric 112 towards or away from the fabric barrel 104. The first motor 134 can be any suitable type of motor, such as an electric motor, a hydraulic motor, or a pneumatic motor, depending on the specific implementation of the retractable blind system 100. The first motor 134 can be coupled to the first drive mechanism 126 by any suitable mechanism. For example, a drive shaft of the first motor 134 can be directly coupled to the first drive mechanism 126. In other examples, the first motor 134 can be coupled to the first drive mechanism 126 via an intermediate transmission such as a gearbox, belt drive etc.

[0049] As shown in Figure 1 , the fabric 112 comprises drive holes 136. The drive holes 136 are configured to engage with the sprocket teeth 152 or the contact pins 146 of the belt 144 (e.g. see Figures 2 or 3). In other examples, the beads 168 of the bead chain 164 are configured to engage the drive holes 136 (e.g. see Figure 4). The drive holes 136 are located on both the first lateral side 114 and the second lateral side 116 of the fabric 112, and they are spaced evenly in a longitudinal direction of the fabric 112. The drive holes 136 allow the fabric 112 to be moved towards or away from the fabric barrel 104 by the drive system 124. In other examples, the drive holes 136 can be located in any other position on the fabric 112. For example, in a less preferred example, the drive holes 136 can be positioned in the middle of the fabric 112 remote from the first lateral side 114 and the second lateral side 116. It may be preferable to position the drive holes 136 along the first lateral side 114 and the second lateral side 116 because then the drive holes 136 can be more easily concealed. This makes the fabric 112 more aesthetically pleasing.

[0050] The longitudinal axis 138 is shown in Figure 1 and illustrates the direction the fabric 112 moves when the fabric 112 moves between the first position and the second position. The longitudinal axis 138 is perpendicular to the rotational axis 110 of the fabric barrel 104. The longitudinal axis 138 provides a reference for the movement of the fabric 112 and the operation of the retractable blind system 100.

[0051] In some implementations, the motor system 130 of the retractable blind system 100 optionally includes a second motor 140. The second motor 140 is operatively coupled to the second drive mechanism 128. The second motor 140 can be used to drive the second drive mechanism 128, thereby moving the fabric 112 towards or away from the fabric barrel 104. The use of the second motor 140 is optional and can be determined based on the specific requirements of the retractable blind system 100. For example, the second motor 140 can be used to provide additional power to the drive system 124, or it can be used to provide redundancy in case of failure of the first motor 134. The second motor 140 can be coupled to the second drive mechanism 128 by any suitable mechanism. For example, a drive shaft of the second motor 140 can be directly coupled to the second drive mechanism 128. In other examples, the second motor 140 can be coupled to the second drive mechanism 128 via an intermediate transmission such as a gearbox, belt drive etc.

[0052] In some configurations, the fabric barrel 104 of the retractable blind system 100 optionally includes a return spring 156. The return spring 156 provides a pulling force to bring the fabric barrel 104 back to its original position after the blind has been retracted or extended. The return spring 156 is configured to be wound around the barrel shaft 108 and to be tensioned when the fabric 112 is moved away from the fabric barrel 104. When the fabric 112 is released, the tension in the return spring 156 causes the fabric barrel 104 to rotate in the opposite direction, thereby pulling the fabric 112 back towards the fabric barrel 104. In some examples, the return spring 156 can be omitted and the first drive mechanism 126 and the second drive mechanism 128 can feed the fabric 112 back onto the fabric barrel 104. Figure 2 provides a detailed view of the motor system 130, the first drive mechanism housing 148, and the tractor feed fabric system 142 of the retractable blind system 100. The tractor feed fabric system 142 as shown in Figure 2 shows a first example which comprises a belt 144 having contact pins 146 which engage the drive holes 136.

[0053] As mentioned above, the motor system 130 drives the first drive mechanism 126 and the second drive mechanism 128. The motor system 130 is configured to receive control signals from the control unit 132 and to convert these control signals into mechanical motion that moves the fabric 112 towards or away from the fabric barrel 104. As mentioned, the motor system 130 can optionally have a first motor 134 and I a second motor 140.

[0054] Whilst the examples discussed in reference to the Figures comprise a motor system 130. In some examples, the motor system 130 is optional. Alternatively, the first and second drive mechanism 126, 128 are manually operated via a rotatable hand crank. In this way, the hand crank is rotated which actuates the first and second drive mechanisms 126, 128.

[0055] The first drive mechanism housing 148 contains and supports the first drive mechanism 126. The first drive mechanism 126 engages the first lateral side 114 of the fabric 112 within the first drive mechanism housing 148. The first drive mechanism housing 148 is designed to be robust and durable to protect the first drive mechanism 126 from damage and to ensure smooth operation of the retractable blind system 100.

[0056] As shown in Figure 2, the tractor feed fabric system 142 is configured to engage the plurality of drive holes 136 on the first lateral side 114 of the fabric 112. The same tractor feed fabric system 142 is also implemented on the second lateral side 116 of the fabric 112 to engage with the drive holes 136.

[0057] In some examples, the tractor feed fabric system 142 optionally extends along the entire length of the first lateral side 114 and the second lateral side 116. This means that the first drive mechanism 126 and the second drive mechanism 128 are optionally always in engagement with at least one drive hole 136 of the fabric 112. This may be advantageous because the fabric 112 does not have to be fed into the first drive mechanism 126 and the second drive mechanism 128 before moving the fabric 112 between the first fabric position 158 and the second fabric position 160.

[0058] In a first example, as shown in Figure 2, the tractor feed fabric system 142 includes a belt 144 that has a plurality of contact pins 146. However, the tractor feed fabric system 142 is any suitable mechanism which engages the drive holes 136 of the fabric 112 when the fabric 112 is moved between the first fabric position 158 and the second fabric position 160. Figures 2, 3, and 4 show different implementations of the tractor feed fabric system 142.

[0059] The belt 144 engages the first lateral side 114 of the fabric 112 as shown in Figure 2. The belt 144 is driven by the motor system 130 and includes a plurality of projecting contact pins 146. The belt 144 extends along the side of the fabric 112 so that it is always engaged with the drive holes 136, regardless of the position of the fabric 112. This ensures that the fabric 112 is moved smoothly and evenly between the first fabric position 158 and the second fabric position 160.

[0060] The contact pins 146 are components of the belt 144 that engage and grip the first lateral side 114 of the fabric 112. The contact pins 146 are mounted on the belt 144 and are configured to protrude through the drive holes 136 in the fabric 112. This engagement between the contact pins 146 and the drive holes 136 allows the belt 144 to move the fabric 112 towards or away from the fabric barrel 104. Since a plurality of contact pins 146 engage the drive holes 136 at the same time, the force exerted at any one point on the fabric 112 will not damage the fabric 112. This maintains the integrity of the fabric 112 and reduces creasing of the fabric 112 during operation.

[0061] The control unit 132 is a component of the retractable blind system 100 that sends control signals to the motor system 130. The control unit 132 includes a sensor, a processor, a memory, an output device, and a communication interface. The control unit 132 is configured to receive feedback from the sensor regarding the position of the fabric 112, to process this feedback using the processor, to store the feedback and control signals in the memory, to provide feedback to a user via the output device, and to communicate with the motor system 130 and any external devices via the communication interface. The control unit 132 controls the movement of the fabric 112 between the first fabric position 158 and the second fabric position 160 based on the control signals and the feedback from the sensor.

[0062] Figure 3 shows a second example of the tractor feed fabric system 142. In Figure 3 the tractor feed fabric system 142 comprises a series of drive sprockets 150 with sprocket teeth 152.

[0063] The first drive mechanism 126 and the second drive mechanism 128 both comprise drive sprockets 150 having sprocket teeth 152. The sprocket teeth 152 are components of the drive sprockets 150 that engage the drive holes 136 on first lateral side 114 and the second lateral side 116 of the fabric 112. The sprocket teeth 152 are configured to protrude through the drive holes 136 in the fabric 112, allowing the drive sprockets 150 to move the fabric 112 towards or away from the fabric barrel 104. The sprocket teeth 152 are designed to engage the drive holes 136 securely and reliably, ensuring smooth and efficient operation of the retractable blind system 100.

[0064] Figure 3 shows four separate drive sprockets 150, however in other examples there can be any number of drive sprockets 150, for example, 2, 3, 4, ,5 etc. At least one of the drive sprockets 150 is operatively coupled to the first motor 134 or the second motor 140. Additional drive sprockets 150 can also be connected to the first motor 134. In other examples, the other drive sprockets 150 can free wheel and are not operatively coupled to the first motor 134 or the second motor 140.

[0065] Figure 4 shows a third example of the tractor feed fabric system 142. Figure 4 provides a detailed view of the bead chain 164 of the retractable blind system 100.

[0066] The first drive mechanism 126 and the second drive mechanism 128 both comprise a bead chain 164 that is a component of the tractor feed fabric system 142 that engages the drive holes 136 on the first lateral side 114 and the second lateral side 116 of the fabric 112. The bead chain 164 includes a cord 166 and a plurality of beads 168. The plurality of beads 168 are spaced on the cord 166 and are configured to engage the drive holes 136 on the first lateral side 114 of the fabric 112. The bead chain 164 is driven by the motor system 130 via sprocket bead recesses 170. When the drive sprockets 150 comprise sprocket bead recesses 170, the drive sprockets 150 do not engage the fabric 112 directly, reducing wear and tear on the fabric 112.

[0067] The cord 166 extends along the centre of the bead chain 164 that connects the plurality of beads 168. The cord 166 is designed to be flexible and durable, allowing the bead chain 164 to move smoothly and reliably along the first lateral side 114 of the fabric 112. The cord 166 is also designed to withstand the forces exerted by the motor system 130 and the drive sprockets 150, ensuring the longevity of the bead chain 164.

[0068] The plurality of beads 168 are components of the bead chain 164 that engage the drive holes 136 on the first lateral side 114 of the fabric 112. The plurality of beads 168 are spaced evenly along the cord 166 and are configured to fit snugly into the drive holes 136. For example, the plurality of beads 168 partially protrude through the drive holes 136 when the bead chain 164 in engagement with the drive holes 136. This engagement between the plurality of beads 168 and the drive holes 136 allows the bead chain 164 to move the fabric 112 towards or away from the fabric barrel 104.

[0069] In the example as shown in Figure 4, the drive sprockets 150 comprise sprocket bead recesses 170 that engage the plurality of beads 168 on the bead chain 164. The sprocket bead recesses 170 are configured to receive the plurality of beads 168, allowing the drive sprockets 150 to move the bead chain 164 and, in turn, the fabric 112.

[0070] Figure 5 provides a detailed view of the coupling rod 172 of the retractable blind system 100.

[0071] The coupling rod 172 is a component of the retractable blind system 100 that operatively connects the first motor 134 to the second drive mechanism 128. The coupling rod 172 is configured to transmit rotational force from the first motor 134 to the second drive mechanism 128, allowing the second drive mechanism 128 to move the fabric 112 towards or away from the fabric barrel 104. The coupling rod 172 is located within the fabric barrel 104 and is positioned above the first fabric position 158 or below the second fabric position 160. The coupling rod 172 ensures that the first motor 134 and the second drive mechanism 128 are synchronised, ensuring smooth and even movement of the fabric 112. This means that the second motor 140 is not needed and the first motor 134 can optionally drive both the first drive mechanism 126 and the second drive mechanism 128.

[0072] The operation of the retractable blind system 100 involves several steps which will now be discussed.

[0073] First, the control unit 132 sends control signals to the motor system 130. These control signals instruct the motor system 130 to drive the first drive mechanism 126 and the second drive mechanism 128, which are respectively arranged on the first lateral side 114 and the second lateral side 116 of the fabric 112. The first drive mechanism 126 and the second drive mechanism 128 then engage the drive holes 136 on the respective sides of the fabric 112 and move the fabric 112 towards or away from the fabric barrel 104. This movement of the fabric 112 occurs between the first fabric position 158 and the second fabric position 160. The control unit 132 optionally uses feedback from the sensor to accurately control the movement of the fabric 112, ensuring that the fabric 112 is moved to the desired position. The operation of the retractable blind system 100 is designed to be smooth and efficient, providing a user with precise control over the amount of light entering a room.

[0074] The fabric 112 is moved by the first drive mechanism 126 and the second drive mechanism 128 towards or away from the fabric barrel 104. This movement occurs between the first fabric position 158 and the second fabric position 160. The movement of the fabric 112 is controlled by the control unit 132, which sends control signals to the motor system 130 based on the desired position of the fabric 112.

[0075] When the fabric 112 is moved towards the fabric barrel 104, the first drive mechanism 126 and the second drive mechanism 128 engage the drive holes 136 on the respective sides of the fabric 112 and pull the fabric 112 towards the fabric barrel 104. This movement winds the fabric 112 onto the fabric barrel 104, retracting the blind and allowing more light to enter the room.

[0076] In some examples, the first drive mechanism 126 and the second drive mechanism 128 engage the drive holes 136 e.g. via teeth, pins, beads etc the fabric 112 is held with a greater over all tension by the first drive mechanism 126 and the second drive mechanism 128 at each of the drive holes 136. This means the fabric 112 is strongly held in place. This can facilitate manufacture and installation of a horizontal blind for a skylight for example, which may not require an additional tension mechanism or could utilise a much simpler tension mechanism than present technology. The first drive mechanism 126 and the second drive mechanism 128 engaging the drive holes 136 also allows the selection of much lighter weight fabrics, as only a minimal level of tension force is applied at each drive hole 136.

[0077] When the fabric 112 is moved away from the fabric barrel 104, the first drive mechanism 126 and the second drive mechanism 128 engage the drive holes 136 on the respective sides of the fabric 112 and pull the fabric 112 away from the fabric barrel 104. This movement unwinds the fabric 112 from the fabric barrel 104, extending the blind and blocking light from entering the room.

[0078] The first drive mechanism 126 and the second drive mechanism 128 are designed to move the fabric 112 evenly between the first fabric position 158 and the second fabric position 160. This synchronisation prevents rippling of the fabric 112 and ensures smooth operation of the retractable blind system 100. Since the fabric 112 comprises drive holes 136, the fabric 112 diameter does not vary along the longitudinal axis of the fabric 112. This means that the fabric 112 does not wrinkle down the sides of the fabric 112.

[0079] The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises," "comprising," "includes," and / or "including" when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and / or groups thereof. It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0080] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

[0081] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealised or overly formal sense unless expressly so defined herein.

[0082] It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims.

Claims

Claims1 . A retractable blind system (100) comprising: a fabric (112) having a first lateral side (114) and a second lateral side (116), the fabric (112) being movable between a first fabric position (158) and a second fabric position (160); wherein the fabric (112) comprises a plurality of drive holes (136) located on the first lateral side (114) and the second lateral side (116); and a first drive mechanism (126) is configured to engage the plurality of drive holes (136) on the first lateral side (114) of the fabric (112) and a second drive mechanism (128) is configured to engage the plurality of drive holes (136) on the second lateral side (116) of the fabric (112) when moving the fabric (112) between the first fabric position (158) and the second fabric position (160).

2. The retractable blind system (100) according to claim 1 , wherein the first drive mechanism (126) and the second drive mechanism (128) each comprise a tractor feed fabric system (142) configured to engage the respective plurality of drive holes (136) on the first lateral side (114) and the second lateral side (116) of the fabric (112).

3. The retractable blind system (100) according to claim 2, wherein the tractor feed fabric system (142) comprises a belt (144) having a plurality of contact pins (146) configured to engage the plurality of drive holes (136).

4. The retractable blind system (100) according to claim 2, wherein the tractor feed fabric system (142) comprises a bead chain (164) having a plurality of beads (168), the plurality of beads (168) being configured to engage the plurality of drive holes (136).

5. The retractable blind system (100) according to any one of claims 2 to 4, wherein the first drive mechanism (126) and the second drive mechanism (128) are synchronised to move the fabric (112) evenly between the first fabric position (158) and the second fabric position (160).

6. The retractable blind system (100) according to any one of the preceding claims further comprising a motor system (130) operatively coupled to a first drive mechanism (126) and a second drive mechanism (128).

7. The retractable blind system (100) according to claim 6, further comprising a control unit (132) configured to send control signals to the motor system (130) to control the movement of the fabric (112) between the first fabric position (158) and the second fabric position (160).

8. The retractable blind system (100) according to any one of claims 6 or 7, wherein the motor system (130) comprises a first motor (134) operatively coupled to the first drive mechanism (126).

9. The retractable blind system (100) according to claim 8, further comprising a coupling rod (172) operatively connecting the first motor (134) to the second drive mechanism (128), wherein the coupling rod (172) is configured to transmit rotational force from the first motor (134) to the second drive mechanism (128).

10. The retractable blind system (100) according to claim 9, wherein the coupling rod (172) is located within a fabric barrel (104) and is positioned above the first fabric position (158) or below the second fabric position (160).

11. The retractable blind system (100) according to any one of claims 6 to 10, wherein the motor system (130) further comprises a second motor (140) operatively coupled to the second drive mechanism (128).

12. The retractable blind system (100) according to any one of claims 1 to 11 , further comprising a headbox (102) configured to house a fabric barrel (104) for storing the fabric (112) as a roll.

13. The retractable blind system (100) according to claim 12, wherein the fabric barrel (104) is rotatably mounted in the headbox (102) and comprises a return spring (156) configured to provide a pulling force to return the fabric barrel (104) to its original position after the fabric (112) has been retracted or extended.

14. The retractable blind system (100) according to any one of claims 1 to 13, further comprising a hembar (122) configured to hold the fabric (112) securely in place at a bottom of the blind.

15. The retractable blind system (100) according to claim 7, wherein the first fabric position (158) and the second fabric position (160) are determined by control signals sent by the control unit (132).

16. A method of operating the retractable blind system (100) according to any one of claims 1 to 15, the method comprising: driving the first drive mechanism (126) and the second drive mechanism (128), the first drive mechanism (126) and the second drive mechanism (128) being respectively arranged on a first lateral side (114) and a second lateral side (116) of a fabric (112); and engaging and moving the fabric (112) towards or away from a fabric barrel (104) by the first drive mechanism (126) and the second drive mechanism (128) when moving the fabric (112) between a first fabric position (158) and a second fabric position (160).

17. A blind fabric (112) for a retractable blind system (100) having a first drive mechanism (126) and a second drive mechanism (128), the blind fabric (112) comprising: a first lateral side (114) and a second lateral side (116), the blind fabric (112) being movable between a first fabric position (158) and a second fabric position (160), a plurality of drive holes (136) located on the first lateral side (114) and the second lateral side (116), the drive holes (136) being configured to engage with the first drive mechanism (126) and the second drive mechanism (128) of the retractable blind system (100) when moving the blind fabric (112) between the first fabric position (158) and the second fabric position (160).

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