Our Ref: 57301nno P/00/009 Regulation 3.2 AUSTRALIA Patents Act 1990 INNOVATION SPECIFICATION FOR AN INVENTION ENTITLED Invention title: String-guiding structure for a curtain-reeling device Name of Applicant: Shih-Ming Lin Address for Service A.P.T. Patent and Trade Mark Attorneys PO Box 222 Mitcham, S.A. 5062 The invention is described in the following statement: 1 STRING-GUIDING STRUCTURE FOR A CURTAIN-REELING DEVICE 2 BACKGROUND OF THE INNOVATION 3 1. Field of the Innovation 4 The present innovation relates to a string-guiding structure for a curtain 5 reeling device that stabilizes the movement of the string after the string goes 6 through a string-guiding frame and winds on a string-guiding wheel assembly 7 during operation. 8 2. Description of Related Art 9 The curtain or blade of window shade is driven by strings of a curtain 10 reeling device. Because the curtain-reeling device is attached to an upper rail and 11 the blade is suspended below the upper rail by the strings, two string-guiding wheel 12 assemblies are mounted on two ends of the upper rail and been wound by the 13 strings to keep the string in good stability and proper tense during operation. 14 However, the speed of curtain-reeling device to release or collect the 15 strings is fast (no matter the curtain-reeling device is manual or automatic one), the 16 strings wound on the string-guiding wheel assemblies easily oscillate or swing to 17 make themselves jammed to the string-guiding wheel assemblies. Especially one of 18 the conventional string-guiding wheel assembly 1 is composed of multiple rollers 19 11 pivotally attached inside a frame 12 (as shown in Figs. 1 and 2), gaps exist 20 between each of two ends of the rollers 11 and the frame 12 (to reduce the friction 21 force between the rollers 11 and the frame 12 and to make the rollers 11 rotate 22 freely) so that a string 13 might fall into the gaps and influence the smooth 23 operation and tense when the string 13 moves rapidly and reciprocally on the 24 corresponding roller 11 when the string 13 violently and transversally swing and 2 1 vertically rebound. Therefore, the conventional curtain-reeling device often has 2 malfunction because of the operational problem that the string 13 gets stuck in the 3 gaps between the rollers 11 and the frame 12 and then jams the curtain-reeling 4 device having no design to limit the oscillation and swing of the string 13. 5 SUMMARY OF THE INNOVATION 6 A main objective of the present innovation is to provide a string-guiding 7 structure for a curtain-reeling device, which has a string-guiding frame mounted at 8 an entrance of a string-guiding wheel assembly to make a string extending from the 9 curtain-reeling device to be limited in its movement and thus to keep the string 10 smoothly being released or collected without getting seized in operation. 11 To achieve the foregoing objectives, the string-guiding structure for a 12 curtain-reeling device comprises: 13 a string-guiding frame mounted at an entrance of a string-guiding wheel 14 assembly to make a string, which is extended from a curtain-reeling device 15 accommodated in an upper rail, to be limited inside the string-guiding frame and 16 wound on multiple rollers inside a frame of the string-guiding wheel assembly to 17 drive a curtain. 18 Further benefits and advantages of the present innovation will become 19 apparent after a careful reading of the detailed description with appropriate 20 reference to the accompanying drawings. 21 BRIEF DESCRIPTION OF THE DRAWINGS 22 Fig. 1 is a partially exploded perspective view of a string-guiding structure 23 for a curtain-reeling device in accordance with the prior art; 24 Fig. 2 is a perspective view of multiple sets of the string-guiding structure 3 1 mounted on the curtain-reeling device in accordance with the prior art; 2 Fig. 3 is a perspective view of a curtain-reeling device having multiple 3 string-guiding structures in accordance with the present innovation; 4 Fig. 4 is a partially cross-sectional side view of the string-guiding structure 5 mounted at an entrance of one string-guiding wheel assembly in Fig. 3; 6 Fig. 5 is a perspective view the string-guiding structure mounted at an 7 entrance of another string-guiding wheel assembly in accordance with the present 8 innovation; 9 Fig. 6 is a perspective view of an embodiment of the string-guiding 10 structure for a curtain-reeling device, wherein the string-guiding structure has two 11 compartments; 12 Fig. 7 is a perspective view of one embodiment of engagement of the 13 string-guiding structure to the string-guiding wheel assembly; and 14 Fig. 8 is a perspective view of another embodiment of engagement of the 15 string-guiding structure to the string-guiding wheel assembly. 16 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 17 A string-guiding structure for a curtain-reeling device in accordance with 18 the present innovation substantially has a string-guiding frame mounted at an 19 entrance of string-guiding wheel assembly to make a string extended from the 20 curtain-reeling device to be limited within the string-guiding frame and to be 21 wound on the string-guiding wheel assembly when the string is released or 22 collected. Therefore, the string-guiding frame depresses the oscillation and swing 23 of the string during operation to avoid the string being jammed in the gaps of the 24 string-guiding wheel assembly. 4 1 A string-guiding structure for a curtain-reeling device substantially has a 2 string-guiding frame 4 mounted at an entrance of a string-guiding wheel assembly 2 3 of a curtain structure 10 for a string 31 (as shown in Fig. 3) to make the string 31 4 extended from the curtain-reeling device 3 on a upper rail 6 to be limited within the 5 string-guiding frame 4 and to be wound on the rollers 21 of the string-guiding 6 wheel assembly 2 to drive the blades 5. The string-guiding frame 4 depresses the 7 oscillation and swing of the string 31 during operation to avoid the string 31 being 8 jammed in the gaps between the rollers 21 and a frame 22 of the string-guiding 9 wheel assembly 2. 10 By having the structure described above, the string-guiding frame 4 is 11 mounted at the entrance of the string-guiding wheel assembly 2 for the string 31 (as 12 shown in Figs. 4 and 5), the path of the string 31 extended from the string reel 3 to 13 the string-guiding wheel assembly 2 is limited within the string-guiding frame 4 14 and thus the string 31 is rectified to wind on correct location of the rollers 21 to 15 avoid the string 31 displacing to ends of the rollers 21. Moreover, vertical rebound 16 and transversal swing range of the string 31 is limited within the string-guiding 17 frame 4 when the string 31 is rapidly pulled or collected so that movement of the 18 string 31 neither exceeds space of the frame 22 nor enters the gaps between the 19 rollers 21 and the frame 22 to keep the curtain-reeling device durable without jam 20 malfunction. 21 The string-guiding frame 4 is a rod 41 shaped into an arch and fixed at the 22 entrance for the string 31 of the string-guiding wheel assembly 2 (the arc-shape is 23 to make less friction to the string 31 and avoid obstruction to the movement of the 24 string 31 by any angle) by inserting distal ends of rod 41 of the string-guiding 5 1 frame 4 at a bottom of the frame 22 of the string-guiding wheel assembly 2 (as 2 shown in Fig. 6) or by directly fixing to the upper rail 6 to correspond to the string 3 guiding wheel assembly 2 to make the string-guiding frame 4 to define a space 42 4 so that the path of the string 31 extended from the string reel 3 to the string-guiding 5 wheel assembly 2 is limited within the space 42 of the string-guiding frame 4. 6 Moreover, the rod 41 is shaped into M-shape with two arches or 7 selectively shaped into multi-arch to define multiple limiting spaces 42 8 corresponding to the numbers of multiple strings 31 (the rod 41 is shaped by 9 conventional technology such as bending, punch pressing or projecting shaping etc.) 10 to make each limiting space 42 through by one string 31 to avoid friction between 11 the multiple strings 3 1. 12 Additionally, the bottom of the frame 22 of the string-guiding wheel 13 assembly 2 has multiple notches 221 defined thereon and pivotally engaged with 14 the rod 41 of the string-guiding frame 4 (as shown in Fig. 7) to make the string 15 guiding frame 4 enable to swing along with the string 31 when the string 31 16 vibrates. 17 Still another embodiment, the bottom of the frame 22 has a pivoting recess 18 222 to accommodate the two distal ends of the rod 41 of the string-guiding frame 4 19 (as shown in Fig. 8) and has a cover 23 matching the pivoting recess 222 to 20 pivotally keep the string-guiding frame 4 on the frame 22, wherein the bottom of 21 the frame 22 and the cover 23 have two slits 231 defined respectively to be paired 22 to receive the two distal ends of the rod 41 and allow the string-guiding frame 4 to 23 pivotally move within the paired two slits 231. 24 When a user operates the curtain structure 10, the string 31 of the string 6 1 reel 3 and the blades 5 are extended or collected and movement of the string 31 2 moves along the path from the string-guiding frame 4, the string-guiding wheel 3 assembly 2, passing the upper rail 6 to hang the blades 5 so that oscillation range of 4 the string 31 between the string reel 3 and the string-guiding wheel assembly 2 is 5 limited by the string-guiding frame 4. The height of the string-guiding frame 4 is 6 preferable to lower than the first roller 21 of the string-guiding wheel assembly 2 7 and the width of the string-guiding frame 4 is preferable to less than half length of 8 the rollers 21 to make the string 31 to enter the string-guiding wheel assembly 2 9 from the center of the entrance and to avoid jam caused by the string 31 dislocated 10 to close the ends of the rollers 21. 11 Additionally, exit of the string reel 3 also has a string-guiding frame 4 to 12 guide the string 31 during extending or collecting operation (as shown in Fig. 3). 13 Although this innovation has been described in its preferred form with a 14 certain degree of particularity, it is understood that the present innovation of the 15 preferred form has been made only by way of example and that numerous changes 16 in the details of construction and the combination and arrangement of parts any be 17 resorted to without departing from the spirit and scope of the innovation. 7