Shroud portion 83 covers the pulley and, in the particular part shown, provides exit slots in both the front and back for the operating cord loop which is not shown. During assembly, as rotating element 35 is fitted over cylindrical extension 45, slot 53 is aligned with tail 57 and they fit together with minimal clearance. No. The characteristics of the clutch should be chosen so that it will slip at a torque somewhat greater than the highest torque that can be realized from the weight of the largest shade to be used. 
6 is a perspective view of the clutch of FIG. Since our clutch mechanism is likely to find its major application in mass produced, prefabricated shades, this consideration is not really a limitation at all. One can also tackle the problem related to the brackets positioning. This permits the external, rotating element to be fitted into the shade roller, as exemplified by the embodiments above described. You must know it in detail so that the blinds can work properly and give an extraordinary, imperial look to your living place. The clutch can be adapted easily to accommodate know shade weights. When the shade is stationary, the torque due to the weight of the shade material hanging from the roller tends to tighten the helical spring about the tubular core to hold the shade in place. Most prefabricated, mass produced shades are made of rather light shade material and they are made for the most popular and standard window sizes. All rights reserved.
Criticisms include the necessity of handling the shade material in order to operate the shade, and unreliable operation. blind roller 38mm mechanism curtain shade accessories clutch shades chain manual ball 4sets package tube Other objects and advantages of our invention will become apparent from the descriptions that follow. This permits the shade to be raised. This mounting is also convenient where a wooden or aluminum headboard is employed. It is another object of our invention to provide a mechanism for the control and operation of a roller-shade that is more reliable than the conventional ratchet and pawl mechanism. FIGS. s6 contral mechanism Copyright ZebraBlinds.com. roller blind accessory spring mechanism larger 1 Is a view of a roller shade in which the clutch of our invention has been installed and mounted on brackets; FIG. Another limitation inherent in the design of our inventive clutch is that the approximate weight of the shade determines the design of the clutch spring. roller alibaba mechanism clutch blinds website larger blind No. To raise the shade, the operator pulls the other leg of the cord loop until the shade reaches the desired position, again with no further action required to hold it in position. A further object of our invention is to provide a roller shade mechanism that requires less lifting force than the friction brakes of the prior art. 1 shows a mounted shade and roller assembly. No. Ratchet and pawl mechanisms are often difficult to engage and can only be set at heights corresponding to the tooth spacing of the ratchet. It is to be expected that larger and non-standard window sizes would continue to be fitted with prior art clutches. What Are Valance Returns and Do You Need Them? 2 is a perspective view of the preferred embodiment of the inventive roller window shade clutch showing the end which, in use, is inserted into an opening in the end of the shade roller; FIG. This is an important consideration where it cannot be determined in advance which direction of rotation will be required. Shaft portion 87 extends axially from bearing and mounting portion 85 of fixed housing 79. In the preferred embodiment of FIGS. The friction brake must provide a force no less than the weight of the shade that is to be supported. 5-8 can, as well, be incorporated into the general design depicted in FIG. Rotate the pulley and grip the chain up to the extent that the chain comes out of the right side of the guard, and then pull down with both the ends dangling out of the clutch. No. In the preferred embodiment, this is accomplished by a number of small ribs 33 which slightly deform roller 3 upon insertion.
8 is a perspective view of a clutch similar to the embodiment of FIG. 43mm 4,009,745. However, this embodiment provides the advantage that the characteristics of spring 55 can be easily modified to accommodate a wide range of shade sizes and weights. 5, cut-away to show the spring; FIG. Embodiments are disclosed which are configured for use in roller shades and for other types of window coverings. 32mm FIG. 7, but made from two molded parts. This mechanism has been in use for many years, but it is notoriously unpopular among users. blind 38mm Counter-clockwise rotation tends to tighten the grip of spring 27 about cylindrical extension 21. 38mm mechanisme blinde rolgordijn The brackets and the pivoting assembly depicted are made according to U.S. Pat. Many a time, problems crop up due to the small parts of the blinds which we generally dont think about. Those who are expert in the art of wrap spring clutches will be familiar with the methods and techniques required. Helical spring 27, as seen in FIG.
Since all blinds and shades are different, we always recommend checking with your blind manufacturer or retailer first before making any modifications to your blinds. The housing is mounted to the wall as described above so that it cannot rotate. Detach the blinds from the wall and pull out the clutch (the part with the chain). 6, the clutch assembly includes cylindrical extension 45 of fixed element 41. blinds clutch roller blind spring chain mechanism shangri 38mm cassette larger Another embodiment shows the application of our invention to installations in which the mounting is to a board or a headrail. Pivoting assembly 7 is inserted into the opposite end of roller 3. roller To prevent such expansion of spring portion 93, shaft portion 87 of fixed housing 79 has shoulder 101 whose inside diameter is slightly smaller than the inside diameter of spring portion 93. roller blind accessory curtain 28mm clutch shade mechanism shutter components parts larger FIG. This is an advantage in public buildings where shades are operated by those unfamiliar with cord operation. No. This clutch mechanism is designed to release for raising the shade so as to minimize effort. 
contral 
Therefore, friction devices are usually made to be adjustable in the field. This introduction of an additional component part does tend to increase cost, but it simplifies the plastic molds and allows greater adaptability to differing performance requirements. generation, Spring clutch assembly with reduced radial bearing forces, Structure of cloth curtain lift controller, Apparatus for opening and closing a window shade or the like, Screen-operating device for use in a roller blind, <- Previous Patent (Guide system for ver). It is a significant advantage of the invention that the clutch releases for motion in the upward direction, so that little additional force is needed beyond that necessary to overcome the weight of the shade itself. 7 shows another embodiment of our invention. ZebraBlinds takes no liability for any issues or damaged caused through following DIY methods. Quite often blinds get stuck while rolling up. The clutch is assembled by inserting rotating pulley element 81 into fixed housing 79. Spring 55 is formed in a closely wound cylindrical helix to fit snugly about cylindrical extension 45. 2004-2022 FreePatentsOnline.com. In elevating the shade, it is, of course, necessary for the operator to apply all of the torque needed to raise the shade. Most of the time, the clutch is broken so it should be replaced as soon as possible. Those with expertise in the art of spring clutch design will realize that, among the parameters that can be adjusted are, the grip of spring 55 on cylindrical extension 45, the number of turns of spring 55, and the size of the wire of which spring 55 is wound. Firstly, pull the clutch back into the blinds and hang them on the wall. With our inventive clutch mechanism, it is possible to lower the shade by pulling directly on the shade itself without damaging the mechanism. Each of the two parts, fixed housing element 15 and rotating pulley element 17, can be formed in a single piece which can be injection molded using a plastic material or die cast using a metal such as zinc. 995,422. 4,433,765, that each of the spring can have fewer turns which provides for smoother operating characteristics. clutch curtain window factory china roller mechanism blind larger Take the chain from the bottom of the roller, bring both ends together, and then fit the connector into it to shut the blinds. It will thus be seen that the objects set forth above among those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the construction of the inventive spring clutch without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. As mentioned above, the clutch mechanism provides a significant advantage over symmetric friction brake devices because, in those devices, the friction must also be overcome when raising the shade, whereas, the clutch of our invention releases when raising the shade so that the force required is only slightly greater than the weight of the shade. General Clutch Corporation (Stamford, CT), 160/291, 160/298, 160/307, 160/308, 160/319, 160/321, 160/323.1, 192/8C, 192/81C, 192/41S, GOTTLIEB, RACKMAN & REISMAN, P.C. This method is appropriate for the blinds which have ball and chain styles of cords. For the clutch shown in FIG. An alternative embodiment of our invention can advantageously be constructed by separating the spring portion from the remainder of rotating element. This requires expensive field service. clutch curtain window factory china roller larger mechanism blind How to Automate My Home Getting Started with Smart Homes. Spring 55 acts in the same way as spring 27 of the preferred embodiment. Privacy Policy It also permits the shade to be operated from one end rather than from the center which can be difficult to reach if the window is behind a piece of furniture. & Terms of Use. It occurs when brackets are placed too far from one another. Save my name, email, and website in this browser for the next time I comment. Referring now to FIG. The fixed and the rotating elements form a wrap spring clutch that is configured to slip in one direction almost without resistance, and to provide moderate resistance to slippage in the other direction. Among these are U.S. Pat. And, it will be easily understood that the variations shown in FIGS. Hold the clutch in such a manner that barrel faces upwards and the base faces downwards of the blinds and slide the chain from the left side of the guard. In its preferred embodiment, it can advantageously be used to raise and lower window shades. The need to predetermine the direction of winding, together with the potential for low manufacturing cost, make this invention an ideal clutch mechanism for prefabricated shades. No. An alternative embodiment for the same use and of the same general configuration uses discrete wire springs. The height of the shade is adjusted by pulling on one or the other side of cord loop 13. Generally, fixed housing 79 is comprised of shroud portion 83, bearing and mounting portion 85, and shaft portion 87, while rotating pulley element 81 is comprised of pulley portion 89, bearing portion 91, and spring portion 93. (NEW YORK, NY, US), Click for automatic bibliography Such installations are appropriate to Venetian blinds, or balloon shades that are raised by cords that lift the shade from the bottom. A further disadvantage of friction brake mechanisms is that they require a substantial number of component parts, usually including friction pads, a spring, and an adjustment screw. And, as before, the weight of the shade contributes to this torque. Therefore, when raising the shade, the operator must, at the very least, provide a force equal to twice the weight of the shade, since the weight must be lifted and the brake force must be overcome. roller contral mechanism Disclaimer: Please follow these instructions at your own risk. Nos. To restore the correct working of blinds, it is necessary for you to know the way of fixing roller blind clutch. All rights reserved. clutch roller mechanism blinds customized middle larger Therefore, the range of weights that such a mechanism would be expected to support can be rather limited. 3 is another perspective view of the same clutch showing the opposite face of the clutch, together with its bracket and cord loop; FIG. The clutch is held together by barbs 47 which are molded as a part of fixed element 41 and which protrude through hole 49 located at the end of rotating element 35. The device of our invention contains fewer parts than the clutches of the prior art. A cover, which is not shown, snaps over the open face of shroud portion 83 to keep the clutch together. This has the advantage of only two component parts, but lacks the adaptability of the version with separate wire springs. 7 is a perspective, partially cut-away view of a third embodiment of our inventive clutch that employs two springs; and. One thing that you should be keeping mind is to trim the new cord according to the size of the blinds. The device is, in effect, an overrunning spring clutch that is designed to slip in either direction, but at different values of applied torque. 2-4, this corresponds to separating spring 27 from the rest of rotating pulley element 17. Rotation of the pulley teeth: Keep rotating the pulley until the tip of the chain reaches the left side of the guard and then put the chain in right place. Further understanding of our invention will become apparent upon consideration of the following detailed description in conjunction with the drawings, in which: FIG. These devices suffer from the disadvantage that a substantial force is needed to raise the shade. This rotation tends to unwind spring 27 and loosen its grip on cylindrical extension 21 of fixed housing element 15. contral s4 9, rib 95 is visible, and ribs 97 and 99 are partially visible, having been cut away to show the interior of the clutch. The device contains a means for receiving a wall or ceiling mounted window shade bracket. Your email address will not be published. When the cord is first pulled, some motion is required before the shade begins to move. Rotating pulley element 17 is generally comprised of three portions, pulley 23, sleeve 25, and spring 27. However, bi-directional clutch devices contain a larger number of parts which makes them more expensive to manufacture. In the direction for lowering the shade, the clutch requires that a high torque be applied for slippage to occur. FIG. FIG. When cord 13 is no longer pulled, clutch assembly 5 again holds shade 1 in position. However, this mounting arrangement is often inconvenient. 5 and 6, although this is clearly not a requirement. So, it may be necessary to re-position them appropriately and timely. 8 shows a clutch assembly with the same operating algorithm as the clutch of FIG. 4,323,105, 4,223,714, and 4,094,904. Nos. Brackets 9 and 11 support the shade and roller assembly. roller The prior art does contain examples of other wrap spring clutch mechanisms used to operate roller shades. When someone pulls the chain of custom roller blinds in the up or down position for raising or lowering the blinds, it can disturb the spring tension and makes it hard to move the blind. Another object of our invention is to provide a roller shade mechanism with minimal lost motion. A spring clutch mechanism for the operation of roller shades and other rollable items. Yet another object of our invention is to provide a roller shade mechanism with containing the minimum number of parts. After assembly, sleeve 37 and spring 55 rotate together, as one piece. The resistance provided by clutch assembly 5 to that rotation holds the shade in position. The shade is operated by a cord loop which passes over a pulley in the device. It also is essentially devoid of lost motion which makes it more aesthetically pleasing to operate. 5 is a perspective view of another embodiment of the invention; FIG. But while doing this, keep it in mind to always use a flat-head screwdriver to pop the clutch of the blinds. According to your need and design of your room, pop out or open the connector from one of the side ends and then pull the chain out to fix the problem of the blinds.
6 is a perspective view of the clutch of FIG. Since our clutch mechanism is likely to find its major application in mass produced, prefabricated shades, this consideration is not really a limitation at all. One can also tackle the problem related to the brackets positioning. This permits the external, rotating element to be fitted into the shade roller, as exemplified by the embodiments above described. You must know it in detail so that the blinds can work properly and give an extraordinary, imperial look to your living place. The clutch can be adapted easily to accommodate know shade weights. When the shade is stationary, the torque due to the weight of the shade material hanging from the roller tends to tighten the helical spring about the tubular core to hold the shade in place. Most prefabricated, mass produced shades are made of rather light shade material and they are made for the most popular and standard window sizes. All rights reserved. Criticisms include the necessity of handling the shade material in order to operate the shade, and unreliable operation. blind roller 38mm mechanism curtain shade accessories clutch shades chain manual ball 4sets package tube Other objects and advantages of our invention will become apparent from the descriptions that follow. This permits the shade to be raised. This mounting is also convenient where a wooden or aluminum headboard is employed. It is another object of our invention to provide a mechanism for the control and operation of a roller-shade that is more reliable than the conventional ratchet and pawl mechanism. FIGS. s6 contral mechanism Copyright ZebraBlinds.com. roller blind accessory spring mechanism larger 1 Is a view of a roller shade in which the clutch of our invention has been installed and mounted on brackets; FIG. Another limitation inherent in the design of our inventive clutch is that the approximate weight of the shade determines the design of the clutch spring. roller alibaba mechanism clutch blinds website larger blind No. To raise the shade, the operator pulls the other leg of the cord loop until the shade reaches the desired position, again with no further action required to hold it in position. A further object of our invention is to provide a roller shade mechanism that requires less lifting force than the friction brakes of the prior art. 1 shows a mounted shade and roller assembly. No. Ratchet and pawl mechanisms are often difficult to engage and can only be set at heights corresponding to the tooth spacing of the ratchet. It is to be expected that larger and non-standard window sizes would continue to be fitted with prior art clutches. What Are Valance Returns and Do You Need Them? 2 is a perspective view of the preferred embodiment of the inventive roller window shade clutch showing the end which, in use, is inserted into an opening in the end of the shade roller; FIG. This is an important consideration where it cannot be determined in advance which direction of rotation will be required. Shaft portion 87 extends axially from bearing and mounting portion 85 of fixed housing 79. In the preferred embodiment of FIGS. The friction brake must provide a force no less than the weight of the shade that is to be supported. 5-8 can, as well, be incorporated into the general design depicted in FIG. Rotate the pulley and grip the chain up to the extent that the chain comes out of the right side of the guard, and then pull down with both the ends dangling out of the clutch. No. In the preferred embodiment, this is accomplished by a number of small ribs 33 which slightly deform roller 3 upon insertion.
8 is a perspective view of a clutch similar to the embodiment of FIG. 43mm 4,009,745. However, this embodiment provides the advantage that the characteristics of spring 55 can be easily modified to accommodate a wide range of shade sizes and weights. 5, cut-away to show the spring; FIG. Embodiments are disclosed which are configured for use in roller shades and for other types of window coverings. 32mm FIG. 7, but made from two molded parts. This mechanism has been in use for many years, but it is notoriously unpopular among users. blind 38mm Counter-clockwise rotation tends to tighten the grip of spring 27 about cylindrical extension 21. 38mm mechanisme blinde rolgordijn The brackets and the pivoting assembly depicted are made according to U.S. Pat. Many a time, problems crop up due to the small parts of the blinds which we generally dont think about. Those who are expert in the art of wrap spring clutches will be familiar with the methods and techniques required. Helical spring 27, as seen in FIG.
Since all blinds and shades are different, we always recommend checking with your blind manufacturer or retailer first before making any modifications to your blinds. The housing is mounted to the wall as described above so that it cannot rotate. Detach the blinds from the wall and pull out the clutch (the part with the chain). 6, the clutch assembly includes cylindrical extension 45 of fixed element 41. blinds clutch roller blind spring chain mechanism shangri 38mm cassette larger Another embodiment shows the application of our invention to installations in which the mounting is to a board or a headrail. Pivoting assembly 7 is inserted into the opposite end of roller 3. roller To prevent such expansion of spring portion 93, shaft portion 87 of fixed housing 79 has shoulder 101 whose inside diameter is slightly smaller than the inside diameter of spring portion 93. roller blind accessory curtain 28mm clutch shade mechanism shutter components parts larger FIG. This is an advantage in public buildings where shades are operated by those unfamiliar with cord operation. No. This clutch mechanism is designed to release for raising the shade so as to minimize effort. 
contral 
Therefore, friction devices are usually made to be adjustable in the field. This introduction of an additional component part does tend to increase cost, but it simplifies the plastic molds and allows greater adaptability to differing performance requirements. generation, Spring clutch assembly with reduced radial bearing forces, Structure of cloth curtain lift controller, Apparatus for opening and closing a window shade or the like, Screen-operating device for use in a roller blind, <- Previous Patent (Guide system for ver). It is a significant advantage of the invention that the clutch releases for motion in the upward direction, so that little additional force is needed beyond that necessary to overcome the weight of the shade itself. 7 shows another embodiment of our invention. ZebraBlinds takes no liability for any issues or damaged caused through following DIY methods. Quite often blinds get stuck while rolling up. The clutch is assembled by inserting rotating pulley element 81 into fixed housing 79. Spring 55 is formed in a closely wound cylindrical helix to fit snugly about cylindrical extension 45. 2004-2022 FreePatentsOnline.com. In elevating the shade, it is, of course, necessary for the operator to apply all of the torque needed to raise the shade. Most of the time, the clutch is broken so it should be replaced as soon as possible. Those with expertise in the art of spring clutch design will realize that, among the parameters that can be adjusted are, the grip of spring 55 on cylindrical extension 45, the number of turns of spring 55, and the size of the wire of which spring 55 is wound. Firstly, pull the clutch back into the blinds and hang them on the wall. With our inventive clutch mechanism, it is possible to lower the shade by pulling directly on the shade itself without damaging the mechanism. Each of the two parts, fixed housing element 15 and rotating pulley element 17, can be formed in a single piece which can be injection molded using a plastic material or die cast using a metal such as zinc. 995,422. 4,433,765, that each of the spring can have fewer turns which provides for smoother operating characteristics. clutch curtain window factory china roller mechanism blind larger Take the chain from the bottom of the roller, bring both ends together, and then fit the connector into it to shut the blinds. It will thus be seen that the objects set forth above among those made apparent from the preceding description, are efficiently attained and, since certain changes may be made in the construction of the inventive spring clutch without departing from the spirit and scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. As mentioned above, the clutch mechanism provides a significant advantage over symmetric friction brake devices because, in those devices, the friction must also be overcome when raising the shade, whereas, the clutch of our invention releases when raising the shade so that the force required is only slightly greater than the weight of the shade. General Clutch Corporation (Stamford, CT), 160/291, 160/298, 160/307, 160/308, 160/319, 160/321, 160/323.1, 192/8C, 192/81C, 192/41S, GOTTLIEB, RACKMAN & REISMAN, P.C. This method is appropriate for the blinds which have ball and chain styles of cords. For the clutch shown in FIG. An alternative embodiment of our invention can advantageously be constructed by separating the spring portion from the remainder of rotating element. This requires expensive field service. clutch curtain window factory china roller larger mechanism blind How to Automate My Home Getting Started with Smart Homes. Spring 55 acts in the same way as spring 27 of the preferred embodiment. Privacy Policy It also permits the shade to be operated from one end rather than from the center which can be difficult to reach if the window is behind a piece of furniture. & Terms of Use. It occurs when brackets are placed too far from one another. Save my name, email, and website in this browser for the next time I comment. Referring now to FIG. The fixed and the rotating elements form a wrap spring clutch that is configured to slip in one direction almost without resistance, and to provide moderate resistance to slippage in the other direction. Among these are U.S. Pat. And, it will be easily understood that the variations shown in FIGS. Hold the clutch in such a manner that barrel faces upwards and the base faces downwards of the blinds and slide the chain from the left side of the guard. In its preferred embodiment, it can advantageously be used to raise and lower window shades. The need to predetermine the direction of winding, together with the potential for low manufacturing cost, make this invention an ideal clutch mechanism for prefabricated shades. No. An alternative embodiment for the same use and of the same general configuration uses discrete wire springs. The height of the shade is adjusted by pulling on one or the other side of cord loop 13. Generally, fixed housing 79 is comprised of shroud portion 83, bearing and mounting portion 85, and shaft portion 87, while rotating pulley element 81 is comprised of pulley portion 89, bearing portion 91, and spring portion 93. (NEW YORK, NY, US), Click for automatic bibliography Such installations are appropriate to Venetian blinds, or balloon shades that are raised by cords that lift the shade from the bottom. A further disadvantage of friction brake mechanisms is that they require a substantial number of component parts, usually including friction pads, a spring, and an adjustment screw. And, as before, the weight of the shade contributes to this torque. Therefore, when raising the shade, the operator must, at the very least, provide a force equal to twice the weight of the shade, since the weight must be lifted and the brake force must be overcome. roller contral mechanism Disclaimer: Please follow these instructions at your own risk. Nos. To restore the correct working of blinds, it is necessary for you to know the way of fixing roller blind clutch. All rights reserved. clutch roller mechanism blinds customized middle larger Therefore, the range of weights that such a mechanism would be expected to support can be rather limited. 3 is another perspective view of the same clutch showing the opposite face of the clutch, together with its bracket and cord loop; FIG. The clutch is held together by barbs 47 which are molded as a part of fixed element 41 and which protrude through hole 49 located at the end of rotating element 35. The device of our invention contains fewer parts than the clutches of the prior art. A cover, which is not shown, snaps over the open face of shroud portion 83 to keep the clutch together. This has the advantage of only two component parts, but lacks the adaptability of the version with separate wire springs. 7 is a perspective, partially cut-away view of a third embodiment of our inventive clutch that employs two springs; and. One thing that you should be keeping mind is to trim the new cord according to the size of the blinds. The device is, in effect, an overrunning spring clutch that is designed to slip in either direction, but at different values of applied torque. 2-4, this corresponds to separating spring 27 from the rest of rotating pulley element 17. Rotation of the pulley teeth: Keep rotating the pulley until the tip of the chain reaches the left side of the guard and then put the chain in right place. Further understanding of our invention will become apparent upon consideration of the following detailed description in conjunction with the drawings, in which: FIG. These devices suffer from the disadvantage that a substantial force is needed to raise the shade. This rotation tends to unwind spring 27 and loosen its grip on cylindrical extension 21 of fixed housing element 15. contral s4 9, rib 95 is visible, and ribs 97 and 99 are partially visible, having been cut away to show the interior of the clutch. The device contains a means for receiving a wall or ceiling mounted window shade bracket. Your email address will not be published. When the cord is first pulled, some motion is required before the shade begins to move. Rotating pulley element 17 is generally comprised of three portions, pulley 23, sleeve 25, and spring 27. However, bi-directional clutch devices contain a larger number of parts which makes them more expensive to manufacture. In the direction for lowering the shade, the clutch requires that a high torque be applied for slippage to occur. FIG. FIG. When cord 13 is no longer pulled, clutch assembly 5 again holds shade 1 in position. However, this mounting arrangement is often inconvenient. 5 and 6, although this is clearly not a requirement. So, it may be necessary to re-position them appropriately and timely. 8 shows a clutch assembly with the same operating algorithm as the clutch of FIG. 4,323,105, 4,223,714, and 4,094,904. Nos. Brackets 9 and 11 support the shade and roller assembly. roller The prior art does contain examples of other wrap spring clutch mechanisms used to operate roller shades. When someone pulls the chain of custom roller blinds in the up or down position for raising or lowering the blinds, it can disturb the spring tension and makes it hard to move the blind. Another object of our invention is to provide a roller shade mechanism with minimal lost motion. A spring clutch mechanism for the operation of roller shades and other rollable items. Yet another object of our invention is to provide a roller shade mechanism with containing the minimum number of parts. After assembly, sleeve 37 and spring 55 rotate together, as one piece. The resistance provided by clutch assembly 5 to that rotation holds the shade in position. The shade is operated by a cord loop which passes over a pulley in the device. It also is essentially devoid of lost motion which makes it more aesthetically pleasing to operate. 5 is a perspective view of another embodiment of the invention; FIG. But while doing this, keep it in mind to always use a flat-head screwdriver to pop the clutch of the blinds. According to your need and design of your room, pop out or open the connector from one of the side ends and then pull the chain out to fix the problem of the blinds.
