BRIEF DESCRIPTION OF THE DRAWINGS
A preferred embodiment of the present invention will now be described with reference to the accompanying drawings in which:
FIG. 1 is a side view of the lift cord anchor clip constructed in accordance with the present invention;
FIG. 2 is a side view of FIG. 1, the opposite side being identical;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a fragmented section view showing the clamping tooth formed on opposite sides of the anchor clip adjacent the throat opening thereof;
FIG. 5 is a fragmented section view showing the construction of one of the cord attaching formations;
FIG. 6 is an end section view showing the construction of the cord attaching formations;
FIG. 7 is a rear schematic view illustrating the construction of a roman blind attaching system using a shade roller and a pair of lift cord anchor clips constructed in accordance with the present invention; and
FIG. 8 is a cross section view showing how the lift cord anchor clip of the present invention is displaceable about the shade roller to adjust its position thereabout or removable from the shade roller.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings and more particularly to FIGS. 1 to 3 there is shown generally at 10 the lift cord anchor clip of the present invention. The clip is comprised of a spring metal band 11 having a partly spherical shape which defines a throat opening 12 which is narrower than the diameter 13 of the spherical shaped band 11. The free ends 14 of the anchor clip are outwardly turned to provide an end flange to provide a smooth surface for ease of placement of the band about a shade roller, and to further provide an engageable means 16, as will be described later. The band is also of a width as illustrated in FIG. 2, but this can vary.
Formed on opposed sides of the anchor clip 10 and above the outwardly turned free ends 14 is a clamping means constituted by a punched out formation which forms a clamping tooth 15 as better illustrated in FIG. 4. This clamping tooth 15 has a pointed end 151 which projects inwardly from the inner surface 17 of the band 11 and upwards from the opening 12 to provide for engagement with a shade roller as will be described later. It is also contemplated that a single clamping means can be provided with teeth pointing in opposite directions on one side only of the anchor clip.
The engageable means 16 is in the form of a slot 16 punched out of the end flange spring metal band 11 on opposed sides of the anchor clip below the clamping teeth 15. This slot 16 permits the insertion of a screwdriver tip 50 (see FIG. 8) for a purpose as will be described later. If a single clamping means is provided, then only one metal flange 16 would be required. The engageable means may also be constituted by the extension of the free ends 14 wherein to provide gripping thereof by a pair of pliers (not shown) to disengage the clamping tooth 15.
With additional reference to FIGS. 5 and 6, it can be seen that located centrally on the top of the anchor clip 10 is a cord attachment means constituted by a cord attaching formation 20 which is formed integral with the band. This cord attaching formation 20 is illustrated in top view in FIG. 3 and side view in FIGS. 1 and 6. It is formed from a single elongated flat rectangular spring metal band which is stamped to define an elevated transverse wall 21 having opposed outwardly curved guide walls 22. A pair of cylindrical through bores 23 are formed by punching a sleeve adjacent a respective side edge 24 of the clips and then punching it outwardly downwards over the elevated transverse wall 21 to form a pair of spaced-apart tunnel-like through bore formations 23. These hollow cylindrical through bores provide for the passage of a string therethrough. The cylinders have an inner rounded surface 231 to provide low friction with the string. As well, the curved guide walls 22 provide low friction with the string attached through one of the hollow cylinders, as will be described later, and in functional contact with the guide walls 22.
The clamping teeth 15 may have a slightly different configuration then that illustrated and could be jagged or rounded instead of pointed as long as it can bite within a shade roller. FIG. 4 illustrates the position of the tooth 15 which is punched inwardly and wherein the free end or pointed 151 end projects inwardly upward from the bottom opening 12, as shown in FIG. 1.
As shown in FIG. 7 the roman blind attaching system is comprised of an elongated shade roller 31 which is supported between a pair of support brackets 32. Support pins 33 are provided at opposed ends of the roller to secure the roller to the brackets and to permit rotation of the roller. The support brackets 32 are secured to a header board 34 by the use of screws 35, and this is well known in the art. A clutch mechanism 36, having a pull chain 37, imparts rotation to the roller 31. Such clutch mechanism is also well known in the art. As herein shown the roman shade 38 consists of panels 39 and cord guide rings 40 secured to each sewn panel pleat junction 41 in the rear of the roman shade 38. The guide rings 40 guide the lift cords 42 therethrough. There are two lift cords 42 and 421 each secured at a lower end 43 and 431 of the roman shade 38 with the guide rings positioned in vertical alignment.
Two lift cord anchor clips 10 and 101 are secured about the shade roller 31 at desired locations offset with respect to an associated one of the lift cords 42 and 421 such that the cords will wind about the roller 31 to a side of the clips 10 and 101, as shown in phantom lines at 42 and 421. It should be noted that the clip 10 is of symmetrical design, and therefore it can be clipped to any side of the roller, either the right side or the left side. Because the clip is symmetrical the user person cannot make a mistake in the installation.
As shown in FIG. 8 a free end portion 45 of each of the lift cords 42, 421, herein lift cord 42, is secured to one of the through bores 23 by passing the free end 45 of the cord through one of the through bores 23, the one facing inside the roller, and while holding the lift cord taut. A knot or several knots 46 are formed adjacent the exit end of the though bore 23 whereby to secure the lift cord to the anchor clip 10. The lift cord abuts against the curved guide wall 22 under the elevated wall 21 and is thus not exposed to any sharp edges. In fact the clip is also formed with rounded edges, such as shown at 25 in FIG. 5.
Because these shade rollers 31 are provided with different diameters, depending on their application and manufacturers, the lift cord anchor clip 10 of the present invention is also fabricated of different diameter sizes so that these clips may be secured to these different diameter size shade rollers. The spring metal clip 10 has a diameter which is slightly smaller than the diameter of the shade roller 31 and sufficient to permit clamping engagement of the anchor clip 10 about the shade roller 31 with the clamping teeth 15 biased against and biting into the outer surface 311 of the shade roller to prevent rotational displacement of the anchor clips 10 and 101 about the shade roller 31.
As also shown in FIG. 8, in order to adjust the position of the anchor clip 10 about the outer surface of the roller 31, it is necessary to disengage one clamping tooth 15 from the outer surface 311 of the roller 31 and this is done by placing a tool, herein a screwdriver tip 50, in the slot 16 in the free end 14 below the tooth 15 and pulling the screwdriver outwardly in the direction of arrow 51 whereby to draw out the lower portion 53 of the anchor clip to disengage the tooth 15 from the outer surface 311. The anchor clip 10 can then be adjusted by rotating it in the direction of arrow 54 which is counter to the projection of the opposite clamping tooth 151 which can then slide over the outer surface 311 of the roller. When the retracting action of a screwdriver is removed, the section 53 of the anchor clip will snap back into position about the outer surface 311 of the roller 31 with both clamping teeth 15 and 151 biting into the outer surface 311 of the roller and preventing rotation of the clip. This adjustment is made after the cord 42 is secured thereto whereby to make the cord taut. By retracting the anchor clip 10, as shown in FIG. 8, the clip can also be removed from its engagement with the roller 31 by pushing the clip in an upward direction.
It is within the ambit of the present invention to cover any obvious modifications over the preferred embodiments described herein, provided such modifications fall within the scope of the appended claims.
Patent Application
20070277936
