Abstract
A peak cover for lift cord and tilt ladder includes a limiter having an arcuate cover. A fixed engagement plate is disposed at an upper end of a left side of the arcuate cover. Two stop walls are disposed on two sides of a lower end of the left side of the arcuate cover. Two grooves are formed inside the stop walls. Two annular ribs of a cord winding reel are engaged in the grooves, whereby the cord winding reel is freely rotatable. A movable engagement plate is disposed at an upper end of a right side of the arcuate cover. Four raised columns are formed on an upper end of the arcuate cover. The arcuate cover of the limiter is capped on the cord winding reel. The fixed engagement plate and the movable engagement plate of the arcuate cover are engaged with the annular ribs on two sides of the cord winding reel. Accordingly, after the arcuate cover is connected with the cord winding reel, the arcuate cover blocks the space above the cord winding reel so as to prevent the cord wound on the cord winding reel from jumping out of the cord winding reel.
Claims
1. A peak cover for lift cord and tilt ladder, comprising a limiter having an arcuate cover, the arcuate cover having two openings passing through the arcuate cover in communication with each other, four raised columns being formed on an upper end of the arcuate cover, the four raised columns being respectively disposed on four corners of the upper end of the arcuate cover, the limiter being disposed between a cord winding reel and a rotational polygonal drum of a blind, when operating blind slats to move up and down, the cord wound on the body of the cord winding reel becoming loosened, the loosened cord being stopped by the arcuate cover from jumping out of the cord winding reel, whereby when the cord winding reel bounces, the four raised columns of the upper end of the arcuate cover stopping lateral sides of the rotational polygonal drum, whereby the limiter can locate and balance the cord winding reel and a ladder of the rotational polygonal drum can downward suspend along the gap between the four raised columns of the arcuate cover to be smoothly wound on the rotational polygonal drum.
2. The peak cover for lift cord and tilt ladder as claimed in claim 1, wherein four slopes are formed on inner sides of the four raised columns.
3. The peak cover for lift cord and tilt ladder as claimed in claim 1, wherein a fixed engagement plate is disposed at an upper end of a left side of the arcuate cover, the fixed engagement plate being engaged with an outer side of an annular rib of the cord winding reel with the cord winding reel freely rotatable.
4. The peak cover for lift cord and tilt ladder as claimed in claim 1, wherein a movable engagement plate is disposed at an upper end of a right side of the arcuate cover, the movable engagement plate being engaged with an outer side of an annular rib of the cord winding reel with the cord winding reel freely rotatable.
5. The peak cover for lift cord and tilt ladder as claimed in claim 1, wherein two stop walls are disposed on two sides of a lower end of the left side of the arcuate cover, two grooves being formed inside the stop walls, the annular ribs of the cord winding reel being engaged in the grooves of the stop walls, whereby the cord winding reel is freely rotatable.
6. The peak cover for lift cord and tilt ladder as claimed in claim 1, wherein arcuate faces are formed between the raised columns and the ladder on the rotational polygonal drum downward suspends along arcuate faces.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a left perspective view of the limiter of the present invention;
[0009] FIG. 2 is a bottom perspective view of the limiter of the present invention;
[0010] FIG. 3 is a right perspective view of the limiter of the present invention;
[0011] FIG. 4 is a perspective exploded view of the present invention;
[0012] FIG. 5 is a perspective assembled view of the present invention;
[0013] FIG. 6 is a side view showing the installation of the present invention;
[0014] FIG. 7 is a perspective exploded view of the present invention, showing the application of the present invention to a horizontal blind;
[0015] FIG. 8 is a perspective assembled view of the present invention, showing the application of the present invention to the horizontal blind;
[0016] FIG. 9 is a perspective view of the present invention, showing the application of the present invention to the horizontal blind; and
[0017] FIG. 10 is a side view of the present invention, showing the application of the present invention to the horizontal blind.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0018] Please refer to FIGS. 1, 2 and 3. An arcuate cover 10 is disposed at a lower end of the limiter 1 of the present invention. More than one fixed engagement plate 11 is disposed at an upper end of a left side of the arcuate cover 10. In addition, two stop walls 111 are disposed on two sides of a lower end of the left side of the arcuate cover 10. Two grooves 110 are formed inside the stop walls 111. A movable engagement plate 12 is disposed at an upper end of a right side of the arcuate cover 10. In addition, four raised columns 13, 14, 15, 16 are formed on the upper end of the arcuate cover 10. Four slopes 130, 140, 150, 160 are formed on inner sides of the four raised columns 13, 14, 15, 16. The arcuate cover 10 of the limiter 1 is capped on a cord winding reel 2 and positioned under a rotational polygonal drum 3. The fixed engagement plate 11 and the movable engagement plate 12 of the arcuate cover 10 are engaged with two annular ribs 20 on two sides of the cord winding reel 2 fitted on a top tube 4. The annular ribs 20 of the cord winding reel 2 are engaged in the grooves 110 of the stop walls 111, whereby the cord winding reel 2 can be freely rotated. Accordingly, after the arcuate cover 10 is connected with the cord winding reel 2, the cord winding reel 2 can be still rotated to wind/unwind the cord (as shown in FIGS. 4, 5 and 6).
[0019] Please refer to FIGS. 7, 8 and 9, which show the application of the limiter of the present invention to a horizontal blind. Three locating support brackets 500, 501, 502 are disposed between two triangular tubes 5, 50. Each of the three locating support brackets 500, 501, 502 is connected with a rotational shaft retaining seat 570, 571, 572. A connection body 503 is disposed between the locating support bracket 500 and the triangular tube 5. A rotational polygonal drum 504 and a rotational polygonal drum 505 are respectively disposed between the locating support brackets 500, 501, 502. In addition, connection bodies 506, 507 are respectively disposed on two sides of the triangular tubes 5, 50. Each of the rotational polygonal drums 504, 505 and the connection bodies 506, 507 is formed with a central quadrangular hole fora rotational shaft 508 to pass through. The rotational shaft 508 is passed through the connection body 503, the rotational shaft retaining seats 570, 571, 572 and the rotational polygonal drums 504, 505. Two ends of the rotational shaft 508 are respectively located on a securing bracket 509 and a securing bracket 510. A bead chain controller 51 is fitted in the triangular tube 5 to control rotation of the triangular tube 5. The bead chain controller 51 is secured on the securing bracket 510. A tube plug shaft hole 511 and an insertion plate 512 are additionally disposed at lower ends of the two securing brackets 509, 510. A bead chain controller 513 is securely disposed on the insertion plate 512. A tube plug 514 is securely disposed in the tube plug shaft hole 511. The bead chain controller 513 and the tube plug 514 serve to locate a triangular top tube 515. Two cord winding reels 516 are additionally fitted on the triangular top tube 515. A limiter 1 is capped on the upper end of the cord winding reel 516 corresponding to the rotational polygonal drums 504, 505. The above components are assembled to complete the horizontal bind structure. The horizontal blind is then secured above a window by means of a rail support bracket 517 and securing leaf spring brackets 518. The bead chain controller provides driving force to make the triangular tube 5 rotate. At the same time, the connection bodies in the triangular tube and the rotational polygonal drums 504, 505 on the rotational shaft 508 are synchronously rotated. Through the rotational shaft 508, the other triangular tube 50 is synchronously rotated so as to achieve a uniform and synchronous driving effect.
[0020] Please now refer to FIGS. 9 and 10. With respect to the operation theory of the present invention, the arcuate cover 10 of the limiter 1 is capped on the cord winding reel 2 and positioned under the rotational polygonal drum 3. The fixed engagement plate 11 and the movable engagement plate 12 of the arcuate cover 10 are engaged with the annular ribs 20 on two sides of the cord winding reel 2. After the arcuate cover 10 is connected with the cord winding reel 2, the arcuate cover 10 blocks the space above the cord winding reel 2 so as to prevent the cord wound on the cord winding reel 2 from jumping out of the cord winding reel 2. When the cord winding reel 2 is rotated and bounces up and down, the four raised columns 13, 14, 15, 16 of the upper end of the arcuate cover 10 stop the lateral sides of the rotational polygonal drum 3 (as shown in FIG. 10). Therefore, the limiter 1 can locate and balance the cord winding reel 3. In addition, the ladder of the rotational polygonal drum 3 can downward suspend along the gap between the four raised columns 13, 14, 15, 16 of the arcuate cover 10 to be smoothly wound on the rotational polygonal drum 3.
[0021] The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.
